Control system, control device, and mobile device for vehicle

A control system a control device, and a mobile device for controlling a vehicle are provided. The control device is adapted to be disposed on a vehicle. The mobile device is configured to establish a connection with the control device via a bluetooth transmission interface. When the connection is established, the control device and the mobile device perform an audio verification means (or optionally also perform a bluetooth verification means) such that the control device performs verification on the mobile device via the transmission of an audio signal (or optionally also via the transmission of a bluetooth signal) and accordingly detects the relative position between the mobile device and the vehicle. In particular, when the mobile device is verified, the control device performs a control function on the vehicle according to the operating state of the vehicle and the relative position between the mobile device and the vehicle.

BACKGROUND OF THE INVENTION

Field of the Invention

The invention relates to a control system and an application thereof, and more particularly, to a control system, a control device of a vehicle, and a mobile device.

Description of Related Art

Among the currently available anti-theft car key systems, the most advanced one is passive keyless entry (PKE) allowing the owner to complete actions such as unlocking the doors and starting the engine without touching the key. That is, when the owner approaches the car, the car automatically detects the key carried by the owner and performs identity verification. When identity verification is complete, the car is automatically unlocked, which allows the owner to enter the car. When the owner enters the car, the car also automatically determines whether the car key is in the car. If the car key is in the car, then the owner only needs to press the engine start button to start the engine. However, microwave signals of a low frequency such as 125 kHz and a high frequency such as 433 MHz for key position detection and identity verification are utilized in the PKE system. However, such frequency bands are not microwave signal frequency bands used in a general mobile device, and therefore a specific remote sensor controller provided with a wireless signal transceiver module operating in the above frequency bands is needed as the car key. For the user, the said specific remote sensor controller still needs to be carried, thus adding to the burden of the owner.

SUMMARY OF THE INVENTION

The invention provides a control system, a control device of a vehicle and a mobile device capable of solving the issues of prior art.

The control system of the invention includes a control device and a mobile device. The control device is adapted to be disposed on a vehicle. The mobile device is configured to establish a connection with the control device via a bluetooth transmission interface. When the connection is established, the control device and the mobile device perform an audio verification means such that the control device performs verification on the mobile device via the transmission of an audio signal and accordingly detects the relative position between the mobile device and the vehicle. In particular, when the mobile device is verified, the control device performs a control function on the vehicle according to the operating state of the vehicle and the relative position between the mobile device and the vehicle.

The control device of the invention is adapted to be disposed on a vehicle. The control device includes a bluetooth module, an audio transceiver module, and a control unit. The bluetooth module is configured to provide a bluetooth transmission interface. The audio transceiver module is controlled to transmit or receive an audio signal. The control unit is electrically connected to the bluetooth module and the audio transceiver module to control the operations of the bluetooth module and the audio transceiver module. When the bluetooth module establishes a connection, the control unit performs an audio verification means, so as to perform verification on the mobile device for which a connection is established with the bluetooth module via the transmission of an audio signal, and accordingly detects the relative position between the mobile device and the vehicle. When the mobile device is verified, the control unit performs a control function on the vehicle according to the operating state of the vehicle and the relative position between the mobile device and the vehicle.

The control system of the invention includes a control device and a mobile device. The control device is adapted to be disposed on a vehicle, wherein the control device includes a first bluetooth module, a second bluetooth module, and an audio transceiver module. The mobile device is configured to establish a connection with the control device via a bluetooth transmission interface provided by the first bluetooth module. When the connection is established, the control device and the mobile device perform a bluetooth verification means and an audio verification means such that the control device performs verification on the mobile device via the second bluetooth module and the audio transceiver module using the transmission of the bluetooth signal and the transmission of the audio signal, and accordingly detect the relative position between the mobile device and the vehicle. When the mobile device is verified, the control device performs a control function on the vehicle according to the operating state of the vehicle and the relative position between the mobile device and the vehicle.

The control device of the invention is adapted to be disposed on a vehicle. The control device includes a first bluetooth module, a second bluetooth module, an audio transceiver module, and a control unit. The first bluetooth module is configured to provide a bluetooth transmission interface. The second bluetooth module is configured to transmit or receive a bluetooth signal. The audio transceiver module is configured to transmit or receive an audio signal. The control unit is electrically connected to the first bluetooth module, the second bluetooth module, and the audio transceiver module to control the operations of the first bluetooth module, the second bluetooth module, and the audio transceiver module. When the first bluetooth module establishes a connection, the control unit performs a bluetooth verification means and an audio verification means, so as to perform verification on the mobile device for which a connection is established with the first bluetooth module via the second bluetooth module and the audio transceiver module using the transmission of the bluetooth signal and the transmission of the audio signal, and accordingly detects the relative position between the mobile device and the vehicle. When the mobile device is verified, the control unit performs a control function on the vehicle according to the operating state of the vehicle and the relative position between the mobile device and the vehicle.

The mobile device of the invention is adapted to perform passive keyless remote control on a vehicle. The mobile device includes a bluetooth module, an audio transceiver module, and a processing unit. The bluetooth module is configured to provide a bluetooth transmission interface (or optionally with a bluetooth signal). The audio transceiver module is controlled to transmit or receive an audio signal. The processing unit is electrically connected to the bluetooth module and the audio transceiver module to control the operations of the bluetooth module and the audio transceiver module. When the bluetooth module establishes a connection, the processing unit performs an audio verification means (or optionally with a bluetooth verification means), so as to provide verification information to the vehicle for which connection is established with the bluetooth module via the transmission of the audio signal (or optionally with the transmission of the bluetooth signal).

Based on the above, the control system, the control device, and the mobile device of a vehicle of the invention teach the use of a bluetooth transmission interface and an audio signal (or optionally with a bluetooth signal) to implement identity verification of the mobile device and short distance detection between the mobile device and the control device by using the control device, and the vehicle is controlled to perform a corresponding control function according to the position of the mobile device. A mobile device such as a general smart phone or tablet computer can also be used for implementation without changing the hardware design. As a result, the user only needs to carry the smart phone or tablet computer thereof as the remote sensor controller of the vehicle to achieve the function of automotive passive keyless entry on a general mobile device, and usage convenience of the user is increased as a result.

DESCRIPTION OF THE EMBODIMENTS

In the following, embodiments are provided as examples of actual implementation of the invention. Moreover, when applicable, devices/components/steps having the same reference numerals in figures and embodiments represent the same or similar parts.

FIG. 1is a function block schematic of a control system of an embodiment of the invention. Referring toFIG. 1, a control system10of the present embodiment includes a control device100and a mobile device200.

The control device100is adapted to be disposed on a vehicle50. The vehicle50can refer to a general powered vehicle such as an automobile, a boat, or a plane. In particular, the control device100can be configured to perform a specific control function on the vehicle50. Using the control device100disposed on a regular car as example, the control device100can perform various functions relating to car operation such as locking or unlocking car doors/car trunk lids, controlling the car to sound an alarm, such allowing or disabling engine start, and the invention does not limit the type of the control function.

The mobile device200can be, for instance, any electronic device having bluetooth function and audio transceiver function such as a smart phone, a smart watch, a smart bracelet, a tablet computer, a notebook computer, or a remote sensor controller, and the invention is not particularly limited in this regard.

In the present embodiment, a connection between the mobile device200and the control device100can be established via a bluetooth transmission interface BLEI, and the control device100can detect the relative position between the mobile device200and the vehicle50via a method of transmitting an audio signal Saud. Then, the control device100performs a corresponding control function according to the operating state of the vehicle50itself and the position of the mobile device200detected. In other words, from the perspective of the user, the control device100performs a corresponding control function according to the position of the user carrying the mobile device200.

The bluetooth transmission interface BLEI can support the bluetooth communications protocol of various specifications (such as bluetooth 4.0, bluetooth 4.1, bluetooth Beacon), and the invention is not limited thereto. Moreover, the frequency of the audio signal Saud can be the frequency of infrasound, acoustic, or ultrasound. To satisfy the application of a general mobile device, an acoustic frequency can be used, but the invention is not limited thereto.

Specifically, the control device100and the mobile device200of the present embodiment can form a passive keyless entry (PKE) applied in the vehicle50. The mobile device200can be used as a remote sensor controller of the system. When the control device100determines the mobile device200is close to the vehicle50or enters the vehicle50(i.e., the user is close to the vehicle50or enters the vehicle50), the control device100automatically performs a corresponding control function, such as unlocking the door and starting the engine.

In the present application, identity verification and short distance detection of the mobile device200are achieved using the bluetooth transmission interface BLEI with the audio signal Saud, wherein the bluetooth module providing the bluetooth transmission interface BLEI and the audio transceiver module transmitting and receiving the audio signal Saud (such as a speaker or a microphone) are both built into a general mobile device. Therefore, when applied in the control system10of the present application, the mobile device200used as a remote sensor controller not only can be implemented using a device traditionally only having passive keyless entry function, a mobile device such as a general smart phone or tablet computer can also be used for the implementation.

In the following,FIG. 2is provided to describe the specific operations and functions of the control device100and the mobile device200. In particular,FIG. 2is a function block schematic of a control device and a mobile device of an embodiment of the invention.

Referring toFIG. 2, the control device100of the present embodiment includes a bluetooth module110, an audio transceiver module120, and a control unit130. The mobile device200includes a bluetooth module210, an audio transceiver module220, and a processing unit230.

The bluetooth modules110and210can be configured to provide the corresponding bluetooth transmission interface BLEI. After successful pairing, the bluetooth modules110and210automatically establish a connection in a bluetooth connection range (such as 10 meters) via the bluetooth transmission interface BLEI.

The audio transceiver modules120and220can be, for instance, audio transmitting units such as buzzers, piezoelectric buzzers, receivers, or speakers or audio receiving units such as microphones. The audio transceiver modules120and220are respectively controlled by the control unit130and the processing unit230to transmit or receive the audio signal Saud. In particular, the hardware configurations of the audio transceiver modules120and220can correspondingly be that one of the audio transceiver modules120and220is the audio transmitting end and the other is the audio receiving end based on the transmission method design requirement, so as to implement the transmission of the audio signal Saud.

For instance, if the control device100is served as the audio transmitting end and the mobile device200is used as the audio receiving end, then the audio transceiver module120can include an audio transmitting unit such as a buzzer, a buzz film, or a speaker to transmit the audio signal Saud, and the audio transceiver module220can include an audio receiving unit such as a microphone to receive the audio signal Saud. On the contrary, if the control device100is served as the audio receiving end, and the mobile device200is used as the audio transmitting end, then the audio transceiver module120is the audio receiving unit to receive the audio signal Saud, and the audio transceiver module220is the audio transmitting unit to transmit the audio signal Saud.

It should be mentioned that, for the general mobile device200, a speaker and a microphone are generally provided together, and therefore the hardware configuration of the mobile device200does not need to be changed regardless of whether the mobile device200is used as the audio transmitting end or the audio receiving end. When served as the audio transmitting end, the mobile device200can enable the speaker to transmit the audio signal Saud; and when used as the audio receiving end, the mobile device200can enable the microphone to receive the audio signal Saud.

The control unit130and the processing unit230are respectively the control cores of the control device100and the mobile device200. The control unit130can be used to control the operations of the bluetooth module110, the audio transceiver module120, and the vehicle50, and the processing unit230can be used to control the operations of the bluetooth module210, the audio transceiver module220, and other components (such as a display module) in the mobile device200. In the present embodiment, the hardware configuration of the control unit130can be implemented using an independent hardware, or using the processor of the trip computer provided in the vehicle50, and the invention is not limited thereto. Moreover, the hardware configuration of the processing unit230can be implemented using the processor provided to the mobile device200.

In the following, the operation of the control system10of the present application is described. After successful pairing, when the user carrying the mobile device200enters the bluetooth connection range of the bluetooth module110, the control device100automatically establishes a connection with the mobile device200.

When the bluetooth connection is established, the control device100and the mobile device200perform an audio verification means such that the control device100performs verification on the mobile device200via the transmission of the audio signal Saud and the control device100can accordingly detect the relative position between the mobile device200and the vehicle50.

More specifically, when the audio verification means is performed, the device used as the audio transmitting end transmits an audio signal Saud, and the device used as the audio receiving end receives the audio signal Saud, and whether the signal waveform of the received audio signal Saud satisfies a preset signal requirement is determined. If the audio receiving end determines the signal waveform of the received audio signal Saud satisfies the preset signal requirement, then the mobile device200passes the verification is determined. On the other hand, if the audio receiving end determines the signal waveform of the received audio signal Saud does not satisfy the preset signal requirement, then the mobile device200does not pass the verification is determined.

For instance, the control device100is served as the audio transmitting end and the mobile device200is used as the audio receiving end as example. When the audio verification means is performed, the control unit130of the control device100enables the audio transceiver module120(implemented by an audio transmitting unit) to transmit the audio signal Saud. The processing unit230of the mobile device200enables the audio transceiver module220(implemented by an audio receiving unit) to receive the audio signal Saud. In particular, the processing unit230determines whether the signal waveform of the audio signal Saud received by the audio transceiver module220satisfies the preset signal requirement. When the processing unit230determines the signal waveform of the audio signal Saud satisfies the preset signal requirement, the processing unit230returns a confirmation signal Scfm to the control device100via the bluetooth transmission interface BLEI. When the bluetooth module110of the control device100receives the confirmation signal Scfm, the control unit130determines the mobile device200is verified.

In this example, from the perspective of the control device100, when the audio verification means is performed, the control unit130enables the audio transceiver module120to transmit the audio signal Saud having a preset signal waveform based on the preset signal requirement. If the bluetooth module110receives the confirmation signal Scfm within a preset period, then the control unit130determines the mobile device200is verified. On the other hand, if the bluetooth module110does not receive the confirmation signal Scfmn within the preset period, then the control unit130determines the mobile device200is not verified.

Moreover, from the perspective of the mobile device200, when the audio verification means is performed, the processing unit230enables the audio transceiver module220to receive the audio signal Saud. In particular, the processing unit230determines whether the signal waveform of the received audio signal Saud satisfies the preset signal requirement. If the signal waveform of the audio signal Saud satisfies the preset signal requirement, then the processing unit230returns the confirmation signal Scfm via the bluetooth module210. On the other hand, if the signal waveform of the audio signal Saud does not satisfy the preset signal requirement, then the processing unit230does not return the confirmation signal Scfm.

The control device100is used as the audio receiving end and the mobile device200is used as the audio transmitting end. When the audio verification means is performed, the control unit130of the control device100enables the audio transceiver module120(implemented by an audio receiving unit) to receive the audio signal Saud. The processing unit230of the mobile device200enables the audio transceiver module220(implemented by an audio transmitting unit) to transmit the audio signal Saud. In particular, the control unit130determines whether the signal waveform of the audio signal Saud received by the audio transceiver module120satisfies the preset signal requirement. When the control unit130determines the signal waveform of the received audio signal Saud satisfies the preset signal requirement, the control unit130determines the mobile device200is verified. On the other hand, when the control unit130determines the signal waveform of the received audio signal Saud does not satisfy the preset signal requirement, the control unit130determines the mobile device200is not verified.

In this example, from the perspective of the control device100, when the audio verification means is performed, the control unit130enables the audio transceiver module120to receive the audio signal Saud. If the control unit130determines the signal waveform of the audio signal Saud satisfies the preset signal requirement, then the control unit130determines the mobile device200is verified. On the other hand, if the control unit130determines the signal waveform of the audio signal Saud does not satisfy the preset signal requirement, then the control unit130determines the mobile device200is not verified.

Moreover, from the perspective of the mobile device200, when the audio verification means is performed, the processing unit230enables the audio transceiver module220to transmit the audio signal Saud having a preset signal waveform based on the preset signal requirement, and uses the audio signal Saud as a verification information.

Moreover, it should be mentioned that, the preset signal requirement can be decided by the control device100or the mobile device200. In an exemplary embodiment, one of the control device100and the mobile device200can provide information relating to the preset signal requirement to the other via the bluetooth transmission interface BLEI when the bluetooth connection is established, or the information can be respectively preset in the control device100and the mobile device200. The invention is not limited thereto.

More specifically, the audio signal Saud can be an encrypted modulation signal generated by an encrypted specific signal modulation method, and the specific signal modulation method is, for instance, amplitude shift keying (ASK), frequency shift keying (FSK), or on/off keying (OOK), and the invention is not limited thereto. The signal waveform of the audio signal Saud is decided according to the specific signal modulation method, i.e., the frequency, amplitude, or phase of the audio signal Saud are decided according to the specific signal modulation method adopted. Therefore, the device used as the audio transmitting end generates and transmits the audio signal Saud according to the specific signal modulation method, and the device used as the audio receiving end receives the audio signal Saud, and whether the signal waveform of the received audio signal Saud satisfies a preset signal requirement is determined. Therefore, the device served as the audio receiving end can determine whether the signal waveform of the received audio signal Saud satisfies a preset signal requirement according to the frequency, amplitude, and/or phase of the audio signal Saud. Alternatively, the device served as the audio receiving end can also determine whether the signal waveform of the audio signal Saud received satisfies a preset signal requirement using time delay estimation (TDE) after digital signal processing.

After the mobile device200is verified, the control device100can perform the corresponding control function on the vehicle50according to the operating state of the vehicle50and the relative position between the mobile device200and the vehicle50.

In the present embodiment, the audio signal transmission range of the audio signal Saud can be set to, for instance, 1.5 meters (but not limited thereto), and the audio transceiver module120can be optionally disposed inside or outside the vehicle50according to application requirements. In other words, from the perspective of the user, the control device100can detect whether the user carrying the mobile device200enters within 1.5 meters of the vehicle50, or detect whether the user enters the vehicle50, and accordingly controls the vehicle to perform a corresponding operation such as unlocking the door or initiating engine start.

To more specifically describe a plurality of possible applications of the control system10of the present application, in the following, the vehicles and the system configurations shown inFIG. 3AandFIG. 3Bare provided as examples. In particular,FIG. 3AandFIG. 3Bare configuration schematics of a vehicle provided with a control device of an embodiment of the invention.

Referring to bothFIG. 3AandFIG. 3B, in the present embodiment, the vehicle50is shown as a car (“car50” hereinafter) as example, but the invention is not limited thereto. From the perspective of structural configuration, the car50includes a car body52, a plurality of car door trigger buttons53, a plurality of car doors54, a plurality of car door handles55, a car trunk lid trigger button56, a car trunk lid57, a car trunk lid handle58, a plurality of locking components59, and other members (such as windshields, rear view mirror, and tires, which are not repeated herein). In particular, the car door trigger buttons53are disposed on the car door handles55. The car door handles55are disposed on the car doors54. The car trunk lid trigger button56is disposed on the rear of the car body52. The car doors54and the car trunk lid57are both disposed on the car body52. The locking components59can be disposed on the car doors54and the car trunk lid57, and can be controlled by the control unit130to lock or unlock the car doors54and the car trunk lid57.

In the configuration of the car50, the space formed by the car body52, the car doors54, and the car trunk lid57with the car windows and front and back windshields is defined as an inside space IS, and the space outside the car body52is defined as an outside space OS. In particular, the inside space IS can further be divided into a sitting space SS allowing passengers and the driver to sit and a trunk space BS formed by the car body52and the car trunk lid57for placing objects.

In a general car design, in the case that the car doors54are closed and the car windows are closed, the sitting space SS and the outside space OS are isolated from each other. Moreover, in the case that the car trunk lid57is closed, the trunk space BS and the outside space OS are isolated from each other. “Isolated from each other” means that the audio signal Saud cannot be transmitted between the two spaces, and therefore whether the mobile device200is located in the sitting space SS, the trunk space BS, or the outside space OS can be determined by whether or not the audio signal Saud is received. Alternatively, “isolated from each other” means that the audio signal Saud is not readily transmitted between the two spaces, such that the audio strength of the audio signal Saud differs significantly between the two spaces. Therefore, whether the mobile device200is located in the sitting space SS, the trunk space BS, or the outside space OS can be determined by determining whether the audio strength of the received audio signal Saud is greater than an audio strength threshold. To clearly describe the invention, in the following embodiments, the audio signal Saud is not readily transmitted between two spaces, but the invention is not limited thereto. In other words, if the mobile device200is located in the outside space OS, then the audio strength of the audio signal Saud transmitted by the audio transceiver module120in the inside space IS received by the mobile device200is not greater than the audio strength threshold, or the audio strength of the audio signal Saud transmitted by the mobile device200received by the audio transceiver module120disposed in the inside space IS is also not greater than the audio strength threshold.

In the present embodiment, the control device100is served as the audio transmitting end as example (but is not limited thereto), and the audio transceiver module120thereof includes, for instance, audio transmitting units122,124,126, and128. In particular, the bluetooth module110, the audio transmitting unit124, and the control unit130are disposed in the sitting space SS, the audio transmitting unit126is disposed in the trunk space BS, and the audio transmitting unit122is disposed on the car door handles55, i.e., the outside of the car body52(outside space OS).

Moreover, the audio transmitting unit128is disposed on the car trunk lid handles58, i.e., the exterior of the car body52(outside space OS).

Moreover, the car door trigger buttons53of the present embodiment can be, for instance, disposed on the car door handles55and electrically connected to the control unit130via a circuit. The user can unlock or lock the car doors54by triggering the car door trigger buttons53. In particular, when the car door trigger buttons53are triggered, the car door trigger buttons53send a car door trigger signal to the control unit130such that the control unit130controls the locking components59to switch between locked state and unlocked state according to the car door trigger signal. The car trunk lid trigger button56can be, for instance, disposed in the rear of the car body52and electrically connected to the control unit130via a circuit. The user can unlock the car trunk lid57by triggering the car trunk lid trigger button56. In particular, when the car trunk lid trigger button56is triggered, the car trunk lid trigger button56sends a car trunk lid trigger signal to the control unit130such that the control unit130controls the locking components59disposed on the car trunk lid57to switch to unlocked state according to the car trunk trigger signal.

Moreover, the car door trigger buttons53and the car trunk lid trigger button56can be implemented in any form of hardware, such as a mechanical button or a capacitive touch button. Therefore, the action of the user can be, for instance, pressing or touching, and the invention is not limited thereto.

More specifically, under the configuration of the control device100of the present embodiment, the audio transmitting units122and128can be controlled by the control unit130and transmit an audio signal toward the outside space OS, the audio transmitting unit124can be controlled by the control unit130to transmit an audio signal toward the sitting space SS, and the audio transmitting unit126can be controlled by the control unit130to transmit an audio signal toward the trunk space BS. In other words, the control device100of the present embodiment can detect whether the mobile device200is located in or close to the space to perform a specific function on the car50with the operating state of the car50. In the following, the first to seventh embodiments shown inFIG. 4AtoFIG. 10Bare used to describe the control states of a plurality of different control devices100. AlthoughFIG. 4AtoFIG. 10Ball show the car50in a simple manner, in actuality, the descriptions of the first to seventh embodiments are all based on the configurations of the car50and the control device100shown inFIG. 3AandFIG. 3B.

FIG. 4AandFIG. 4Bare operation schematics of a control system of the first embodiment of the invention. The application of passive door unlock is implemented.

Referring toFIG. 4AandFIG. 4B, in the present embodiment, the car50is preset to the state in which the locking components are in locked state and the engine is not started. When the user is to start the car50, the user gradually approaches the car50carrying the mobile device200. When the user enters a bluetooth connection range BSR, the control device100automatically establishes a bluetooth connection with the mobile device200. At this point, the control device100provides information relating to the preset signal requirement to the mobile device200via the bluetooth transmission interface BLEI.

Then, when the user reaches the car50and triggers the car door trigger buttons53, the control unit130of the control device100receives the car door trigger signal and provides the car door trigger signal to the mobile device200via the bluetooth transmission interface BLEI. At this point, the mobile device200enables the microphone to prepare to receive the audio signal Saud1. The control unit130accordingly enables the audio transmitting unit122to transmit the audio signal Saud1.

At this point, since the mobile device200is located within the audio signal transmission range ASR of the audio signal Saud1, the microphone of the mobile device200can receive the audio signal Saud1transmitted by the audio transmitting unit122. The mobile device200determines whether the signal waveform of the received audio signal Saud1satisfies the preset signal requirement. It should be mentioned that, the audio signal transmission range ASR can be a range defined by whether the audio signal Saud1is received, or the audio signal transmission range ASR can also be a range defined by whether the audio strength of the received audio signal Saud1is greater than another audio strength threshold. The other audio strength threshold for deciding the audio signal transmission range ASR can be the same as or different from the audio strength threshold for identifying the inside space OS, the sitting space SS, and the trunk space BS isolated from one another, and the invention is not limited thereto. In other words, in addition to directly determining whether the audio signal Saud1is received, the mobile device200can also determine whether the audio signal Saud1is received according to whether the audio strength of the received audio signal Saud1is greater than the audio strength threshold. The audio strength threshold value can be set according to actual demand, and the invention is not particularly limited in this regard.

If the user is a lawful user (possessing the pairing mobile device200), then the mobile device200determines the signal waveform of the received audio signal Saud1satisfies the preset signal requirement, and therefore a confirmation signal Scfm1is further returned to the control device100via the bluetooth transmission interface BLEI. The control unit130then determines that the user currently triggering the car door trigger buttons53is a lawful user according to the received confirmation signal Scfm1, and therefore the locking components59are controlled to remove the locked state such that the user can open the car doors54.

On the other hand, if the user is an unlawful user (possessing an unpaired mobile device), then the control device100does not establish a bluetooth connection with the non-pairing mobile device. Even if a lawful user is not located in the bluetooth sensing range and an unlawful user triggers the car door trigger buttons53at this point, since the unpaired mobile device does not analyze the signal waveform of the audio signal Saud1, the unpaired mobile device does not return the confirmation signal Scfm1. Therefore, the control device100determines the user currently triggering the car door trigger buttons53is an unlawful user, and controls the locking components59to maintain locked state and controls the car to sound an alarm.

In an application of the present embodiment, the control device100can also send a notice (such as flashing lights or emitting a sound) when the bluetooth connection is successfully established, such that the user can more easily determine the position of the car50.

FIG. 5AandFIG. 5Bare operation schematics of a control system of the second embodiment of the invention. The application of passive car trunk unlock is implemented.

Referring toFIG. 5AandFIG. 5B, the concept of the present embodiment is substantially the same as that of the first embodiment, and the difference between the two is mainly that, in the present embodiment, after the user triggers the car trunk lid trigger button56disposed in the rear of the car body52, the control unit130makes the audio transmitting unit128transmit the audio signal Saud1by enabling the audio transmitting unit128disposed on the car trunk lid handle58to detect whether the user opening the car trunk lid57is a lawful user. The specific signal transmission and unlock method are as described in the first embodiment and are not repeated herein.

In other words, in the applications of the first and second embodiments, with the locking components59in locked state, if the control unit130receives the trigger signal and determines the mobile device200is located in the outside space OS and is within a preset distance from the car body52(i.e., within the audio signal transmission range ASR) within a preset period, then the control unit130controls the locking components59to remove the locked state.

FIG. 6AandFIG. 6Bare operation schematics of a control system of the third embodiment of the invention. The application of the engine start function is implemented.

Referring toFIG. 6AandFIG. 6B, in the present embodiment, the car50is preset to the state in which the engine is not started. After the user enters the car and closes the car doors54, when the user presses an engine start button EGB, the control unit130enables the audio transmitting unit124in the car such that the audio transmitting unit124transmits an audio signal Saud2.

At this point, if the user also brings the mobile device200into the car as shown inFIG. 6A, then the mobile device200receives the audio signal Saud2for which the audio strength is greater than the audio strength threshold, and after the signal waveform of the received audio signal Saud2is determined to satisfy the preset signal requirement, a confirmation signal Scfm2is returned to the control device100via the bluetooth transmission interface BLEI. The control unit130then determines the mobile device200is located in the sitting space SS according to the received confirmation signal Scfm2and controls the car50to enter start mode from off mode.

If the user does not also bring the mobile device200inside the car as shown inFIG. 6B, then the audio strength of the audio signal Saud2transmitted by the audio transmitting unit124in the car and received by the mobile device200located outside the car is not greater than the audio strength threshold, and therefore the control unit130determines the mobile device200is not located in the sitting space SS after the preset period, and controls the car50to remain in off mode, and controls the car50to send an alarm to notify the driver that the mobile device200is not in the car.

FIG. 7is an operation schematic of a control system of the fourth embodiment of the invention. The application of detecting whether the mobile device200is unexpectedly taken from the car is implemented.

Referring toFIG. 7, in the present embodiment, the control unit130detects whether a non-driver side car door54R is open, and enables the audio transmitting unit124in the car after the non-driver side car door54R is opened and then closed, such that the audio transmitting unit124transmits the audio signal Saud2.

At this point, if the control unit130determines the mobile device200is not taken, then the control unit130does not change the operating state of the car50.

On the other hand, if a passenger in the car50leaves the car from the non-driver side car door54R and accidentally takes the mobile device200out of the car, then the audio strength of the audio signal Saud2transmitted by the audio transmitting unit124in the car and received by the mobile device200is not greater than the audio strength threshold, and therefore the control unit130determines the mobile device200is not located in the sitting space SS after the preset period, and therefore controls the car50to send an alarm prompt to notify the driver that the mobile device200is not in the car. Moreover, the mobile device200also sends an alarm prompt to remind the passenger that the mobile device200is taken outside the car.

FIG. 8AandFIG. 8Bare operation schematics of a control system of the fifth embodiment of the invention. The application of detecting whether the mobile device200is left in the car to decide whether the car doors are locked is implemented.

Referring toFIG. 8AandFIG. 8B, in the present embodiment, the car50is preset to the state in which the locking components59are in unlocked state and the engine is not started. The control unit130detects whether a driver side car door54L is open, and enables the audio transmitting unit124in the car after the driver side car door54L is opened and then closed, such that the audio transmitting unit124transmits the audio signal Saud2.

At this point, if the driver does not leave the mobile device200in the car as shown inFIG. 8A, then the control unit130determines the mobile device200is not located in the car when the confirmation signal Scfm2is not received after the preset period. Therefore, the control unit130enables the audio transmitting unit122on the car door handles55when the car door trigger signal is received (i.e., when the driver triggers the car door trigger buttons53) such that the audio transmitting unit122transmits the audio signal Saud1. Therefore, the control unit130receives the confirmation signal Scfm1and determines the driver triggers the car door trigger buttons53. The locking components59are switched to locked state to lock the car50.

On the other hand, if the driver leaves the mobile device200in the car as shown inFIG. 8B, then the control unit130receives the confirmation signal Scfm2returned by the mobile device200in response to the audio signal Saud2and determines the mobile device200is located in the car. Therefore, the control unit130controls the car50to send an alarm prompt and controls the locking components59to remain in unlocked state when the control unit130receives the car door trigger signal (i.e., when the driver triggers the car door trigger buttons53), so as to prevent the car50from locking when the driver forgets the mobile device200in the car.

In an application of the present embodiment, if the control unit130determines the mobile device200is taken outside the car by the driver but the driver does not trigger the car door trigger buttons53within a period of time or is outside the bluetooth connection range BSR, then the control unit130or the processing unit230can send an alarm prompt to remind the driver that the car50is not locked. Moreover, the control unit130can also decide whether or not to automatically lock the car doors according to the design specification requirements of the car50or the settings of the driver.

FIG. 9is an operation schematic of a control system of the sixth embodiment of the invention. The application of anti-theft detection is implemented.

Referring toFIG. 9, in the present embodiment, the car50is preset to the state in which the locking components59are in locked state. In the case that the lawful user locks the car50and is to leave, if an unlawful user is to open the car doors and triggers the car door trigger buttons53, then the control unit130enables the audio transmitting unit122outside the car when the car door trigger signal is received, such that the audio transmitting unit122transmits the audio signal Saud1.

At this point, the lawful user should be located outside the audio signal transmission range ASR of the audio signal Saud1, such that the mobile device200cannot receive the audio signal Saud1or the audio strength of the audio signal Saud1received thereby is not greater than the audio strength threshold. Therefore, the control unit130determines the user currently triggering the car door trigger buttons53is an unlawful user after the preset period, and accordingly controls the car50to send an anti-theft alarm or controls the mobile device200to send an anti-theft alarm.

FIG. 10AandFIG. 10Bare operation schematics of a control system of the seventh embodiment of the invention. The application of detecting whether the mobile device200is left in the car trunk to decide whether or not to close the car trunk lid is implemented.

Referring toFIG. 10AandFIG. 10B, in the present embodiment, the car50is preset to the state in which the locking components on the car trunk lid57are in unlocked state, i.e., the car trunk lid is in open state. The control unit130detects whether the car trunk lid57is open or closed, and when the car trunk lid57is closed, the locking components59on the car trunk lid57are switched to locked state and the audio transmitting unit126in the trunk space BS is enabled, such that the audio transmitting unit126transmits an audio signal Saud3.

At this point, if the user does not leave the mobile device200in the car trunk as shown inFIG. 10A, then the control unit130determines the mobile device200is not located in the car trunk when the confirmation signal is not received after the preset period. Therefore, the control unit130keeps the locking components on the car trunk lid57in locked state to lock the car trunk lid57.

On the other hand, if the user leaves the mobile device200in the car trunk as shown inFIG. 10B, then the control unit130receives the confirmation signal Scfm3returned by the mobile device200in response to the audio signal Saud3and determines the mobile device200is located in the car trunk. Therefore, the control unit130controls the car50to send an alarm prompt and controls the locking components on the car trunk lid57to switch to unlocked state to open the car trunk lid57, so as to prevent the driver from accidentally locking the car trunk lid57when the mobile device200is left in the car trunk.

In addition to the above applications, in the present application, the pairing action of sending the passkey in an out of band (OOB) manner can also be achieved using the audio signal Saud, and by making the inside space IS an isolated space, man-in-the-middle attack (MITM attack) can be prevented, such that pairing safety is increased.

Referring toFIG. 6A, when the control device100and the mobile device200are not paired with each other and the bluetooth connection has not established yet, the control unit130enables the audio transmitting unit124and the bluetooth module110in the car when all of the car doors are closed, so as to make the audio transmitting unit124send a bluetooth passkey by transmitting the audio signal Saud2.

At this point, the mobile device200receives the audio signal Saud2, and performs bluetooth pairing according to the passkey contained in the audio signal Saud2, so as to establish bluetooth connection between the control device100and the mobile device200.

In the following,FIG. 11andFIG. 12are used to describe the specific operations and functions of the control device and the mobile device in another exemplary embodiment. In particular,FIG. 11is a function block schematic of a control system of another embodiment of the invention.FIG. 12is a function block schematic of a control device and a mobile device of another embodiment of the invention.

Referring toFIG. 11, the structure shown inFIG. 11is substantially the same as that ofFIG. 1, and the difference between the two is that, the control device100and the mobile device200perform an audio verification means and a bluetooth verification means. In the embodiment shown inFIG. 11, a connection between the mobile device200and the control device100can be established via the bluetooth transmission interface BLEI, and the control device100can detect the relative position between the mobile device200and the vehicle50via a method of transmitting the audio signal Saud and transmitting a bluetooth signal Sble. Then, the control device100performs a corresponding control function according to the operating state of the vehicle50itself and the position of the mobile device200detected. The bluetooth signal Sble can be a bluetooth communications protocol of various specifications (such as bluetooth 4.0, bluetooth 4.1, or bluetooth Beacon), and the invention is not limited thereto.

More specifically, in the embodiment shown inFIG. 11, the control device100can determine the distance between the mobile device200and the vehicle50via the transmission of the bluetooth signal Sble. Moreover, the control device100can determine if the mobile device200is located in the outside space OS, the sitting space SS, or the trunk space BS via the transmission of the audio signal Saud.

Referring further toFIG. 12, the structure of the present embodiment is substantially the same as that ofFIG. 2. The main difference between the two is that in the present embodiment, a received signal strength indicator (RSSI) verifying the bluetooth signal Sble is used to determine the distance between the mobile device200and the control device100to replace the function of transmitting the audio signal Saud toward the outside space OS or receiving the audio signal Saud in the audio transceiver module120. The embodiment shown inFIG. 12is exemplified by adding a bluetooth module112to generate the bluetooth signal Sble, but the invention is not limited thereto, and the bluetooth signal Sble can also be generated by the bluetooth module110providing the bluetooth transmission interface.

Specifically, the control device100of the present embodiment includes a bluetooth module110, a bluetooth module112, an audio transceiver module120, and a control unit130. The mobile device200includes a bluetooth module210, an audio transceiver module220, and a processing unit230.

In the present embodiment, the bluetooth module110is configured to provide the corresponding bluetooth transmission interface BLEI with the bluetooth module210of the mobile device200, such that a connection can be automatically established between the bluetooth modules110and210via the bluetooth transmission interface BLEI in the bluetooth connection range after successful pairing.

The bluetooth module112of the present embodiment is mainly used to transmit or receive the bluetooth signal Sble, wherein since the RSSI value of the bluetooth signal Sble is substantially in a proportional relationship with the distance from the device (i.e., the closer the mobile device200is to the control device100, the higher the RSSI value of the bluetooth signal Sble sensed). Based on this characteristic, the control device100of the present embodiment can use the RSSI value of the bluetooth signal Sble as the basis for verifying the distance between the mobile device200and the vehicle.

In the following, the operation of the control system10of the present application is described. After successful pairing, when the user carrying the mobile device200enters the bluetooth connection range of the bluetooth module110, the control device100automatically establishes a connection with the mobile device200.

When the bluetooth connection is established, the control device100and the mobile device200perform a bluetooth verification means and an audio verification means such that the control device100performs verification on the mobile device200via the transmission of the bluetooth signal Sble and the transmission of the audio signal Saud and the control device100can accordingly detect the relative position between the mobile device200and the vehicle50.

More specifically, when the bluetooth verification means is performed, the device served as the bluetooth signal transmitting end transmits the bluetooth signal Sble, and the device served as the bluetooth signal receiving end receives the bluetooth signal Sble, and whether the RSSI value of the received bluetooth signal Sble is located in a preset strength range is determined. When the audio verification means is performed, the device served as the audio transmitting end transmits the audio signal Saud satisfying a preset signal requirement, the device served as the audio receiving end receives the audio signal Saud, and whether the audio strength of the received audio signal Saud is greater than an audio strength threshold and whether the signal waveform thereof satisfies the preset signal requirement are determined. If the bluetooth signal receiving end determines the RSSI value of the received bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received by the audio receiving end is not greater than the audio strength threshold, then the mobile device200is determined to be verified. On the other hand, if the bluetooth signal receiving end determines the RSSI value of the received bluetooth signal Sble is located outside the preset strength range, then the mobile device200does not pass the verification is determined. Alternatively, if the bluetooth signal receiving end determines the RSSI value of the received bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received by the audio receiving end is greater than the audio strength threshold and the signal waveform of the audio signal Saud satisfies the preset signal requirement, then the mobile device200does not pass the verification is determined.

For instance, the control device100is served as the bluetooth signal transmitting end and the audio transmitting end, and the mobile device200is served as the bluetooth signal receiving end and the audio receiving end as example. When the bluetooth verification means and the audio verification means are performed, the control unit130of the control device100enables the bluetooth module112to transmit the bluetooth signal Sble and enables the audio transceiver module120to transmit the audio signal Saud according to a preset signal requirement. The processing unit230of the mobile device200enables the bluetooth module210to receive the bluetooth signal Sble and enables the audio transceiver module220to receive the audio signal Saud. In particular, the processing unit230determines whether the RSSI value of the bluetooth signal Sble received by the bluetooth module210is located in the preset strength range and determines whether the audio strength of the audio signal Saud received by the audio transceiver module220in the preset period is greater than the audio strength threshold and whether the signal waveform thereof satisfies the preset signal requirement. When the processing unit230determines the RSSI value of the bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received in the preset period is not greater than the audio strength threshold, then the processing unit230returns the confirmation signal Scfm to the control device100via the bluetooth transmission interface BLEI. When the bluetooth module110of the control device100receives the confirmation signal Scfm, the control unit130determines the mobile device200is verified. When the processing unit230determines the RSSI value of the bluetooth signal Sble is located outside the preset strength range, the processing unit230does not return the confirmation signal Scfm to the control device100via the bluetooth transmission interface BLEI. Alternatively, if the processing unit230determines the RSSI value of the received bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received in the preset period is greater than the audio strength threshold and the signal waveform thereof satisfies the preset signal requirement, then the processing unit230does not return the confirmation signal Scfm to the control device100via the bluetooth transmission interface BLEI. When the bluetooth module110of the control device100does not receive the confirmation signal Scfm in the preset period, the control unit130determines the mobile device200is not verified.

In this example, from the perspective of the control device100, when the bluetooth verification means and the audio verification means are performed, the control unit130enables the bluetooth module112to transmit the bluetooth signal Sble and enables the audio transceiver module120to transmit the audio signal Saud satisfying a preset signal requirement. If the bluetooth module110receives the confirmation signal Scfm within a preset period, then the control unit130determines the mobile device200is verified. On the other hand, if the bluetooth module110does not receive the confirmation signal Scfm within the preset period, then the control unit130determines the mobile device200is not verified.

Moreover, from the perspective of the mobile device200, when the bluetooth verification means and the audio verification means are performed, the processing unit230determines whether the RSSI value of the bluetooth signal Sble received by the bluetooth module210is located in the preset strength range and determines whether the audio strength of the audio signal Saud received by the audio transceiver module220is greater than the audio strength threshold, and whether the signal waveform thereof satisfies the preset signal requirement. If the RSSI value of the bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received in the preset period is not greater than the audio strength threshold, then the processing unit230returns the confirmation signal Scfm via the bluetooth module210. On the other hand, when the processing unit230determines the RSSI value of the bluetooth signal Sble is located outside the preset strength range, or the RSSI value of the bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received in the preset period is greater than the audio strength threshold, and the signal waveform thereof satisfies the preset signal requirement, the processing unit230does not return the confirmation signal Scfm.

The control device100is served as the bluetooth signal receiving end and the audio receiving end, and the mobile device200is served as the bluetooth signal transmitting end and the audio transmitting end as example. When the bluetooth verification means and the audio verification means are performed, the control unit130of the control device100enables the bluetooth module112to receive the bluetooth signal Sble and enable the audio transceiver module120to receive the audio signal Saud. The processing unit230of the mobile device200enables the bluetooth module210to transmit the bluetooth signal Sble and enables the audio transceiver module220to transmit the audio signal Saud satisfying a preset signal requirement. In particular, the control unit130determines whether the RSSI value of the bluetooth signal Sble received by the bluetooth module112is located in the preset strength range and whether the audio strength of the audio signal Saud received by the audio transceiver module120in the preset period is greater than the audio strength threshold and whether the signal waveform thereof satisfies the preset signal requirement. When the control unit130determines the RSSI value of the received bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received in the preset period is not greater than the audio strength threshold, the control unit130determines the mobile device200is verified. On the other hand, when the control unit130determines the RSSI value of the received bluetooth signal Sble is located outside the preset strength range, or the RSSI value of the bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received in the preset period is greater than the audio strength threshold, and the signal waveform thereof satisfies the preset signal requirement, the control unit130determines the mobile device200is not verified.

In this example, from the perspective of the control device100, when the bluetooth verification means and the audio verification means are performed, the control unit130enables the bluetooth module112to receive the bluetooth signal Sble and enables the audio transceiver module120to receive the audio signal Saud. If the control unit130determines the RSSI value of the bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received in the preset period is not greater than the audio strength threshold, then the control unit130determines the mobile device200is verified. On the other hand, if the control unit130determines the RSSI value of the bluetooth signal Sble is located outside the preset strength range, or the RSSI value of the bluetooth signal Sble is located in the preset strength range and the audio strength of the audio signal Saud received in the preset period is greater than the audio strength threshold, and the signal waveform thereof satisfies the preset signal requirement, then the control unit130determines the mobile device200is not verified.

Moreover, from the perspective of the mobile device200, when the bluetooth verification means is performed, the processing unit230controls the bluetooth module210to transmit the bluetooth signal Sble. When the audio verification means is performed, the audio transceiver module220transmits the audio signal Saud satisfying a preset signal requirement, and uses the audio signal Saud as a verification information.

Moreover, the detailed signal transmission of the case of using the control device100as the bluetooth signal transmitting end and the audio receiving end and using the mobile device200as the bluetooth signal receiving end and the audio transmitting end, and the detailed signal transmission of the other case of using the control device100as the bluetooth signal receiving end and the audio transmitting end and using the mobile device200as the bluetooth signal transmitting end and the audio receiving end are as described in the above two examples and is not repeated herein.

After the mobile device200is verified, the control device100can perform the corresponding control function on the vehicle according to the operating state of the vehicle and the relative position between the mobile device200and the vehicle.

In the present embodiment, the bluetooth signal Sble can be, for instance, set to have the RSSI value located in the preset strength range (such as ≥−60 dBm) when two devices are within 1.5 meters of each other (but not limited thereto). Therefore, whether the mobile device200is located in the sitting space SS, the trunk space BS, or the outside space OS can be determined by determining whether the audio strength of the received audio signal Saud is greater than the audio strength threshold. In other words, from the perspective of the user, the control device100can detect whether the user carrying the mobile device200enters within 1.5 meters of the vehicle50, or detect whether the user enters the vehicle50, and accordingly controls the vehicle to perform a corresponding operation such as unlocking the car doors.

From the perspective of the specific structure of the control system, since the bluetooth module112of the present embodiment replaces the function of transmitting the audio signal toward the outside space OS or receiving the audio signal in the audio transceiver module120with the verification function in the above embodiment by transmitting or receiving the bluetooth signal Sble, the configuration of the bluetooth module112on the vehicle can be similar to the configuration of the audio transmitting units122and128in the audio transceiver unit120inFIG. 3AandFIG. 3B. In other words, the bluetooth module112of the present embodiment can be disposed on the car doors54/car door handles55or disposed on the car trunk lid handle58.

In the following, the eighth to eleventh embodiments shown inFIG. 13AtoFIG. 16are used to describe the control states of a plurality of different control devices100.

FIG. 13AandFIG. 13Bare operation schematics of a control system of the eighth embodiment of the invention. The application of passive door unlock is implemented. Referring toFIG. 13AandFIG. 13B, in the present embodiment, the car50is preset to the state in which the locking components are in locked state and the engine is not started. When the user is to start the car50, the user gradually approaches the car50carrying the mobile device200. When the user enters a bluetooth connection range BSR, the control device100automatically establishes a bluetooth connection with the mobile device200.

Then, when the user reaches the car50and triggers the car door trigger buttons53, the control unit130of the control device100receives the car door trigger signal and accordingly enables the bluetooth module112to transmit the bluetooth signal Sble and enables the audio transmitting unit124to transmit the audio signal Saud2satisfying a preset signal requirement. It is assumed here that the RSSI values of the bluetooth signal Sble in a preset range PR from the car doors are all located in the preset strength range.

If the user is a lawful user (carrying a paired mobile device200), then when the user triggers the car door trigger buttons53, since the mobile device200is sufficiently close to the car doors and is located in the outside space OS, the RSSI value of the bluetooth signal Sble received by the mobile device200is determined to be located in the preset strength range and the audio strength of the audio signal Saud2received in the preset period is not greater than the audio strength threshold, and therefore the mobile device200can further return the confirmation signal Scfm1to the control device100via the bluetooth transmission interface BLEI. The control unit130then determines that the user currently triggering the car door trigger buttons53is a lawful user according to the received confirmation signal Scfm1, and therefore the locking components59are controlled to remove the locked state such that the user can open the car doors54.

On the other hand, if the user is an unlawful user (possessing an unpaired mobile device), then the control device100does not establish a bluetooth connection with the unpaired mobile device. Even if a lawful user is not located in the bluetooth sensing range and an unlawful user triggers the car door trigger buttons53at this point, the unpaired mobile device does not perform the action of determining whether the RSSI value of the bluetooth signal Sble is located in the preset strength range and also does not return the confirmation signal Scfm1. Therefore, the control device100determines the user currently triggering the car door trigger buttons53is an unlawful user, and controls the locking components59to remain in locked state and controls the car to send an alarm prompt.

It should be mentioned that, when the control device100receives the confirmation signal Scfm1, the control device100determines the mobile device200is located in the outside space and is within the preset distance from the car body. When the control device100does not receive the confirmation signal Scfm1, the control device100determines the mobile device200is located in the inside space or is located in the outside space and is farther than the preset distance away from the car body. As a result, when the lawful user carries the mobile device200and is located in the inside space, others located in the outside space cannot change the locked state of the locking components59without the permission of the lawful user.

FIG. 14AandFIG. 14Bare operation schematics of a control system of the ninth embodiment of the invention.FIG. 14AandFIG. 14Bshow the application of implementing passive car trunk unlock. The concept of the present embodiment is substantially the same as that of the eighth embodiment, and the difference between the two is mainly that, in the present embodiment, after the user triggers the car trunk lid trigger button56disposed in the rear of the car body52, the control unit130makes the bluetooth module112transmit the bluetooth signal Sble by enabling the bluetooth module112disposed on the car trunk lid handle58to detect whether the user opening the car trunk lid57is a lawful user. The specific signal transmission and unlocking method are as described in the eighth embodiment and are not repeated herein.

In other words, in the applications of the eighth and ninth embodiments, with the locking components59in locked state, if the control unit130receives the trigger signal and determines the mobile device200is located in the outside space OS and is within the preset distance PR from the car body52, then the control unit130controls the locking components59to remove the locked state.

FIG. 15AandFIG. 15Bare operation schematics of a control system of the tenth embodiment of the invention. The application of detecting whether the mobile device200is left in the car to decide whether the car doors are locked is implemented.

Referring toFIG. 15AandFIG. 15B, in the present embodiment, the car50is preset to the state in which the locking components59are in unlocked state and the engine is not started. The control unit130detects whether the driver side car door54L is open, and enables the audio transmitting unit124in the car after the driver side car door54L is opened and then closed, such that the audio transmitting unit124transmits the audio signal Saud2.

At this point, if the driver does not leave the mobile device200in the car as shown inFIG. 15A, then the control unit130determines the mobile device200is not located in the car when the confirmation signal Scfm2is not received after the preset period. Therefore, the control unit130enables the bluetooth module112on the car door handles55when the car door trigger signal is received (i.e., when the driver triggers the car door trigger buttons53) such that the bluetooth module122transmits the bluetooth signal Sble. When the RSSI value of the bluetooth signal Sble received by the mobile device200is determined to be located in the preset strength range, the control unit130receives the confirmation signal Scfm1and determines the driver triggers the car door trigger buttons53. The locking components59are switched to locked state to lock the car50.

On the other hand, if the driver leaves the mobile device200in the car as shown inFIG. 15B, then the control unit130receives the confirmation signal Scfm2returned by the mobile device200in response to the audio signal Saud2and determines the mobile device200is located in the car. Therefore, the control unit130controls the car50to send an alarm prompt and controls the locking components59to remain in unlocked state when the control unit130receives the car door trigger signal (i.e., when the driver triggers the car door trigger buttons53), so as to prevent the car50from locking when the driver forgets the mobile device200in the car.

FIG. 16is an operation schematic of a control system of the eleventh embodiment of the invention. The application of anti-theft detection is implemented. Referring toFIG. 16, in the present embodiment, the car50is preset to the state in which the locking components59are in locked state. In the case that the lawful user has locked the car50and left, if an unlawful user is trying to open the car doors and trigger the car door trigger buttons53, then the control unit130enables the bluetooth module112outside the car when the car door trigger signal is received, such that the bluetooth module112transmits the bluetooth signal Sble and enables the audio transceiver module124in the car to transmit the audio signal Saud2satisfying a preset signal requirement.

At this point, the lawful user should be located outside the preset range PR and located in the outside space OS, such that the mobile device200cannot receive the bluetooth signal Sble, or the RSSI value of the bluetooth signal Sble received is located outside the preset strength range. Therefore, the control unit130determines the user currently triggering the car door trigger buttons53is an unlawful user after the preset period, and accordingly controls the car50to send an anti-theft alarm or controls the mobile device200to send an anti-theft alarm.

Other applications such as implementing engine start function are as shown inFIG. 6AandFIG. 6B, i.e., the third embodiment of the invention. The application of detecting whether the mobile device200is unexpectedly taken from the car is as shown inFIG. 7, i.e., the fourth embodiment of the invention. The application of detecting whether the mobile device200is left in the car trunk to decide whether or not to close the car trunk lid is as shown inFIG. 10AandFIG. 10B, i.e., the seventh embodiment of the invention. The pairing action of sending the passkey is achieved in an out of band (OOB) manner using the audio signal Saud, and is not repeated herein.

Although the invention has been disclosed above by the embodiments, modifications and alterations can be made without departing from the spirit and scope of the invention. Therefore, the scope of the invention falls in the appended claims.