METHOD AND SYSTEM FOR UNLOCKING OF OBJECTS

Abstract: It is disclosed a method and system for unlocking an object (20, 24, 25) for an authorized person, by transmitting an unlock signal and a device signal from a remote station (10) to the object and storing the same in a memory (125), by comparing the device signal with an input conducted by a person at the object, for verification of authorization of the person; and by unlocking said object by means of a locking unit (130) if the authorization of the person has been verified.

Description: Method and system for unlocking of objects The invention relates to a method and system for unlocking of objects like cars, airplanes, plants, houses or other such facilities. The operation of said objects and the entry into such objects, respectively, is in many cases restricted to persons, who -are the owner of the object or who are exclusively authorized for other reasons. For avoiding unauthorized entry, use, operation or theft, the objects can be closed or locked with a locking/unlocking means, which is for example a key, with which entry, operation etc. can be enabled and disabled. The most common application example for such a system and method is a car which the driver opens and starts with his key. However, if the driver looses the key or if he forgets the key inside the car and closes, the door so that it is locked, he has no longer access to the car until he has got a second or substitute key. This may impose great problems especially if the driver is far away from home or travelling in remote areas with no service station on his way. US-PS 6.072.402 discloses a secure entry system which makes use of radio transmissions to communicate between a central station (clearinghouse) and locks, keys and related components throughout the system. A user who seeks access to a lock establishes communication via a cellular telephone or a conventional communication link to the central station. If . this determines by verification that the user should be authorized to access the related lock, the central station RF- transmits an authorization signal to the lock or to a related key for unlocking the lock, to authorize the user to access the area secured by the lock. After identifying the presence of the user at the lock, the user can unlock the lock. It is an object of the invention to provide a simple and easy to implement method and system for unlocking of objects like cars, airplanes, plants, houses and other such facilities only by an authorized user. It is an object of the invention to provide a method and system for unlocking of objects like cars, airplanes, plants, houses and other such facilities, by which these objects can be unlocked in case that the usual locking/unlocking means is not available. It is a further object of the invention to provide a method and system for unlocking said objects in case that the usual unlocking means is not available, in such a way, that only an authorized person gets access to or can operate said object again. These and other objects are solved by a method according to claim 1. Further, these and other objects are achieved by a system according to claim 8. The subclaims are directed to advantageous embodiments of the solutions according to claims 1 and 8, respectively. Further details, features and advantages become apparent from the following description of a preferred embodiment of the invention with reference to the drawings, in which shows: Fig. 1 a schematic diagram of the components of an inventive system; Fig. 2a, 2b block diagrams of the units provided in an object and a service station according to the invention; and Fig. 3 a flow chart of a method according to the invention. The major components of a preferred embodiment of the inventive system and its environment are shown in Figur 1. It comprises a customer service center (central station or remote station) 10 with an operator 11. At least one vehicle 20, at least one boat or ship 24, as well as one or more stationary equipments 25 like a remote facility or plant communicate with the service center 10 via a cellular communication network 30 like GSM (european standard) or AMPS (US standard) and / or a satellite communication network 31, both for exchanging of information, data and voice communication, each in both directions. Even software programs can be transmitted if necessary. Emergency assistance vehicles 22 and a roadside assistance vehicle 23 communicate with the service center 10 in a similar manner or in any other way and are activated by the service center in case of need by one of the objects 20, 24, 25. A position of each object can be detected by means of a global positioning system (GPS) 40. Figure 2a shows a block diagram of units provided in an object according to the invention. According to Figure 2a, each of said objects is equipped with- an appropriate receiver unit 100 like a mobile communication unit or a satellite communication unit which is steadily installed within each object for communication with the service center. The receiver unit 100 is connected with a control unit 120 which comprises a first timer (timing circuit) 122, a second timer (timing circuit) 123 and a memory 125. At least one device 110 which can manually be actuated is provided with a sensor 111 for detecting such actuation. In the case of a car this device is e. -g. a grip of at least one door, the left or the right rear mirror, an antenna, the motor hood or another component. The sensor 111 is connected with the control unit 120. Further, a locking unit 130 is connected with the control unit 120 for locking and unlocking a lock of the object. In case of a car this lock is at least one of the door locks. A switch 140 for activating the object, e.g. a switch for starting a motor by manually pressing a button, is as well provided and connected with the control unit 120. Finally, a disable switch 150 for disabling activation of the object is connected with the control unit. In case of a car, this switch is preferably provided for blocking the entire electronic control of the motor so that it cannot be started any more and a theft is prevented. Figure 2b shows a block diagram of the units provided in a service station or a central station (remote station) according to the invention. According to Figure 2b, such station is equipped with a transmitter/receiver unit 200 like a mobile communication unit or a satellite communication unit for communication with each object. A control unit 220 is connected with the transmitter/receiver unit 200 and provided for generating an unlock signal, a device signal, an enable signal and a disable signal for transmitting these signals by the transmitter/receiver unit 200 to an object. Finally, a data base 230 is as well provided and connected with the control unit 220 for storing a personal identification code for each approved user of one of the obj ects . Figur 3 shows a flow chart of an inventive method for remote unlocking such an object for an authorized person. It is supposed that this object is a car and that the authorized person is the driver of the car. As a starting situation 50, the driver travels on a longer journey and decides to have a break now. He leaves his car, locks the door and goes for a walk. When he retuns to his car he realizes that he has left his key inside the car so that he is now unable to get into the car. In a first step 51 the driver D takes his mobile phone P or goes to a public telefone box and contacts the related service center 10 or another related remote station. He requests the operator 11 to remotely unlock the door of his car. In a second step 52 the operator 11 of the service center 10 advises the driver to identify himself by transmitting his personal identification code which can be single letters, a word or a number. This code can be spoken to the operator or the driver enters the same into the key pad of the telephone so that the code is transmitted via audiofrequency or voice frequency dialling or signalling in a known manner to the sevice center 10. According to step 53, the personal identification code is verified and tested. If it is valid and correct which may be ensured by using the data base 230 comprising all customers and the associated personal identification codes, then the operator at the service center 10 transmits according to step 54 an unlock signal via the cellular communication network 30 (e.g. via SMS in the GSM-network) and / or the satellite communication network 31 to the car. Otherwise (identification code is invalid) the process is terminated (step 55) . Further, according to step 56, the operator instructs the driver to actuate at least one device 110 at his car (i.e. making an input at the car), for example to actuate the left and / or the right rear mirror, the antenna or the grip of one of the doors, when he is back at his car. According to step 57, the operator at the service center 10 additionally transmits at least one device signal to the car which designates and identifies each such device 110 which he told the driver to actuate. The receiver unit 100 inside the car receives the unlock signal and the device signal and stores both of them according to step 58 in the internal memory 125 of the control unit 120. When the driver returns to his car, he actuates the designated device 110 according to the instruction of the operator (step 59) . According to step 60 this actuation is detected by the sensor 111 which is associated with this device. The sensor signal is input to the control unit 120 which according to step 61 compares it with the device signal stored in the memory 125. If both signals match each other, and an unlock signal has been received from the service center, the control unit generates a first signal to the locking unit 130 for unlocking the locks of the doors of the car so that the driver now can get into his car again (step 62). If the signals don't match, the control unit 120 terminates the process without generating the first signal (step 63) . According to a second embodiment of the invention, the control unit 120 is as well provided for generating a second signal to the motor- starter switch 140 for enabling this switch for starting the motor without a key by simply pressing a button. If the driver has lost his key instead of just leaving it inside the car, he contacts the service center 10 as mentioned above and requests not only to unlock the door but also to enable the motor to be started without the key. After having identified as the authorized driver, the service center transmits the unlock signal and the at least one device signal for designating a device as mentioned above and further transmits the enable signal which is also stored in the memory 125 of the control unit 120. When the driver returns to his car, he actuates the designated device 110 and after receiving the sensor signal and verification, the control unit 120 generates the first and second signal. The driver can now open the door, get into his car and can start the motor by means of the switch 140 which is provided inside the car and is enabled by the second signal. According to a third embodiment, the actuation of the designated device 110 and / or the actuation of the switch 140 for starting the motor is effective only after expiration of a predetermined first period of time after reception of the transmitted unlock signal and - if applicable - the enable signal at the control unit 120. This time delay may be a fixed delay or the delay time is determined by the service center in dependance of the distance of the driver from his car and the time he approximately needs to return to his car. This time delay is as well transmitted from the service center to the car and evaluated by the control unit 120 which effects accordingly the first timing circuit 122 for delayed unlocking the locking unit 130 and / or the second timing circuit 123 for delayed enabling of the motor starter switch 140. In a similar manner, according to a fourth embodiment, the actuation of the designated device 110 and / or the actuation of the motor starter switch 140 is effective only during a predetermined second period of time after reception of the transmitted unlock signal and - if applicable - the enable signal at the control unit 120. If the driver does not return to his car and actuates the designated device and - if applicable - the motor starter switch 140 before expiration of this second period of time, the control unit 120 clears the first and second timing circuits 122, 123, respectively, so that the actuation of the designated device 110 and the motor starter switch 140 has no effect and the driver has to contact the service center again and proceed as mentioned above for transmission of unlock and device signal, as well as of the enable signal, if applicable. According to a fifth embodiment of the invention, the control unit 120 clears the first and second timing circuits 122, 123, respectively, so that the actuation of the designated device has no effect, if the driver has actuated one or two non-designated devices before. Finally, the optional disable unit 140 can be activated by the control unit 120 for disabling the whole electronic control of the motor so that a theft is prevented. The disable unit 140 can be activated either upon reception of the above mentioned disable signal from the service station or e.g. together with a clearing of the first and / or second timing circuit, if the driver has actuated one or two non-designated devices before. The main advantage of the inventive solution resides in the fact that a high level of security against theft and unauthorized use, operation or entry can be provided. This is achieved by transmitting the device signal, which identifies a device to be actuated and which is known only by . the driver because of free designation by the service center. The security level is increased by providing the said first and / or second periods of time, as well as by disabling any access according to the fifth embodiment. If the car is provided with the switch 140 for starting the motor without a key which is normally disabled and can be enabled by the control unit 120 according to the second embodiment, the inventive solution is even applicable in case of lost key.

Claims: Claims 1. Method for unlocking an object for an authorized person, characterized in the following steps: transmitting an unlock signal and a device signal from a remote station to the object and storing the same in a memory; comparing the device signal with an input conducted by a person at the object, for verification of authorization- of the person; and unlocking said object by means of the unlock signal if the authorization of the person has been verified. 2. Method according to claim 1, characterized in that prior to transmitting the unlock signal and the device signal, a personal identification code of the person is transmitted to the remote station. 3. Method according to claim 1 or 2, characterized in that the device signal is a signal which designates a device at the object and that the input is an actuation of the device, which actuation is sensed by a sensor means. 4. Method according to one of claims 1 to 3, characterized is that the input is effective only after expiration of a predetermined first period of time after reception of the unlock signal from the remote station. 5 . Method according to one of claims 1 to 4 , characterized in • that the input is effective only during a predetermined second period of time after reception of the unlock signal from the remote station. 6. Method according to one of claims 1 to 5, characterized in that a second input has no effect, if authorization of the person has not been verified for a first input prior to the second input. 7. Method according to one of claims 1 to 6, characterized in that the object is a car and that the motor is enabled to be started without a key by means of an enable signal if the authorization of the person has been verified. 8. System for unlocking an object for an authorized person, comprising a remote station (10) for transmitting an unlock signal and a device signal to the object (20, 24, 25); a receiver unit (100) and a control unit (120) at the object for receiving and comparing the device signal with an input conducted by a person at the object, for verification of authorization of the person, and for unlocking the object by means of the unlock signal if the authorization of the person has been verified. 9. System according to claim 8, characterized in that the device signal is a signal which designates a device (110) at the object and that the input is an actuation of the device, wherein a sensor means (111) is provided for sensing actuation of the device and transmitting the sensor signal to the control unit (120) . 10. System according to claim 8 or 9 , characterized in a first timer (122) for providing a predetermined first period of time after reception of the unlock signal from the remote station (10) , wherein the input is effective only after expiration of this first period of time. 11. System according to one of claims 8 to 10, characterized in a second timer (123) for providing a predetermined second period of time after reception of the unlock signal from the remote station (10) , wherein the input is effective only during this second period of time. 12. Computer program for conducting a method according to one of claims 1 to 7. 13. Computer program product comprising a program code for conducting a method according to one of claims 1 to 7 on a computer. 14. Object like a car, airplane, plant, house or other facility, the operation and / or entry of which is restricted to authorized persons, characterized in a receiver unit (100) for receiving a device signal from a remote station and a control unit (120) for comparing the same with an input conducted by a person at the object, for verification of authorization of the person, and for unlocking a locking unit (130) at the object, if the authorization of the person has been verified.

Inventors: GUDMUNDSSON STEFAN, GUDMUNDSSON, STEFAN
Applicants: GUDMUNDSSON STEFAN, VOLVO TEKNISK UTVECKLING AB, GUDMUNDSSON, STEFAN
Application year: 2001
Main classification: E05B49
IPC codes: B60R25, G07C9