Abstract:
A motion sensing remote control device including a motion sensing module, a calculation unit, a motion setting unit, a transmit unit and a receiving unit is disclosed. The present invention controls a remote control car to perform various motions by sensing the user&#39;s gestures. The motion sensing module senses and converts the gestures into a voltage signal for the calculation unit to perform calculation. The motion setting unit generates a corresponding command based on the calculation result of the calculation unit, and transmits the command to the remote control car through the transmit unit and the receiving unit such that the remote control car executes the received command to perform the corresponding motion specified by the user.

Description:
CROSS-REFERENCES TO RELATED APPLICATION 
     This application claims the priority of Taiwanese Patent Application No. 102130343, filed on Aug. 23, 2013, which are incorporated herewith by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention generally relates to a remote control device, and more specifically to a motion sensing remote control device for easily controlling a remote control car to perform corresponding motions through a user&#39;s intuitive sense. 
     2. The Prior Arts 
     Among various interactive model toys, a remote control car is believed to be one of the most popular for adults and kids. The remote control car is generally remotely controlled by manipulating the joystick (or bar) or the keys provided on the remote controller to cause the remote control car to perform corresponding motions such as moving forward or backward, or turning around. 
     In the prior arts, the control system for controlling the remote control car is usually implemented by different designs such as frequency modulation (FM) or amplitude modulation (AM). The remote control car basically comprises a car body, a signal receiving unit and a drive part. The signal receiving unit and the drive part are installed in the car body, and the signal receiving unit is electrically connected to the drive part. When the user sends an operation signal, the signal receiving unit receives and converts the operation signal into an operation command, which is then transferred to the drive part so as to drive the car body to move. 
     However, the control direction of the current remote control car is oriented by the head of the remote control car. As a result, it often happens that the proceeding direction of the remote control car is opposite to the direction in which the joystick or bar is pulled by the user during remote control. This problem may cause the remote control car to bump into or get stuck in the obstacle on the way, or even suffer from serious damage. 
     In addition, the joystick and the keys lack good sensitivity. The corresponding hardware is firstly actuated to trigger the operation signal, which is transferred to the drive part to move the remote control car, and the user needs to correctly pull or move the joystick or press the keys to generate the operation signal. As a result, it takes some time for the hardware to operate and process the signal such that the remote control car often fails to move or stop immediately. Also, the remote control car easily overturns, collides with or gets stuck in the obstacle. 
     The traditional gun-like or joystick controller is provided with an actuation control mechanism for respectively controlling the turning motion and the throttle bar of the remote control car. As for the joystick controller, the throttle bar can be manipulated to move upward and downward and the turning throttle bar in the rightwise and leftwise directions so as to cause the remote control car to move forward, backward, stopping, turning and running around. However, it fails to perform some specific motions like acceleration or deceleration. As with the above problem of not meeting the real time operation, the remote control solution in the prior arts only provides the user to handle the proceeding direction of the remote control car by pulling the control bar with the fingers in an indirect sense. Such an operation is boring and lacks the variety, and further, the user can not easily control the remote control car to perform correct motion from a direct and intuitive sense. 
     Therefore, the present design only simulates few proceeding motions for a real car, leading to limited functions and applications, and hence the user may easily lose the sense of achievement and the interest in playing the remote control car in a short period of time. 
     SUMMARY OF THE INVENTION 
     The primary object of the present invention is to provide a motion sensing remote control device, which helps the user intuitively control the remote control car to perform corresponding motions through specific gestures, thereby enhancing the preciseness of control and improving the user&#39;s interest and sense of achievement. 
     To this end, the motion sensing remote control device of the present invention comprises a motion sensing module, a calculation unit, a motion setting unit, a transmit unit and a receiving unit. Specifically, the motion sensing module is provided on the motion sensing remote control device for sensing a respective physical variation of an angular velocity in X-axis and/or Y-axis. The physical variation is converted into an analog voltage signal for the respective angular velocity in X-axis and/or Y-axis, and the analog voltage signal is then transmitted. 
     The calculation unit is provided on the motion sensing remote control device and connected to the motion sensing module for receiving the analog voltage signal for the angular velocity in X-axis and/or Y-axis from the motion sensing remote control device. Further, the calculation unit calculates a variation of the analog voltage signal for the angular velocity in X-axis and/or Y-axis through a motion prediction algorithm, and encodes the variation into a first motion message and/or a second motion message. For example, the first motion message comprises a message for turning rightwise, leftwise or backing, and the second motion message comprises a message for forward or backward moving or stopping movement. The calculation unit then converts the analog voltage signal for the angular velocity in X-axis and/or Y-axis into an X-axis pulsed width modulation signal and/or a Y-axis pulsed width modulation signal, calculates a periodical variation for the X-axis pulsed width modulation signal and/or the Y-axis pulsed width modulation signal through the motion prediction algorithm, and encodes a third motion message and/or a fourth motion message based on the periodical variation for the X-axis pulsed width modulation signal and/or the Y-axis pulsed width modulation signal. Preferably, the third motion message comprises a message for increasing, fixing or reducing a turning scale, and the fourth motion message comprises a message for accelerating, fixing or decelerating movement. 
     The motion setting unit is provided on the motion sensing remote control device and connected to the calculation unit for receiving the first, second, third and fourth motion messages from the calculation unit. The first, second, third and fourth motion messages are decoded into first, second, third and fourth motion control commands, respectively, which are further transmitted. It is preferred that the motion setting unit comprises a built-in programmable and rewritable motion setting database including the first, second, third and fourth motion control commands corresponding to the first, second, third and fourth motion messages, respectively. 
     The transmit unit is provided on the motion sensing remote control device and connected to the motion setting unit for receiving the first, second, third and/or fourth motion control commands from the motion setting unit, and wirelessly transmitting the first, second, third and/or fourth motion control commands. The receiving unit is provided in the remote control car for receiving the first, second, third and/or fourth motion control commands from the transmit unit. The remote control car steers its proceeding direction based on the first and second motion control commands, and changes its turning scale and proceeding speed based on the third and fourth motion control commands. 
     More specifically, the first motion message is a message for turning rightwise, leftwise or backing based on the variation of the analog voltage signal for the angular velocity in X-axis, the second motion message is a message for forward or backward moving, or stopping movement based on the variation of the analog voltage signal for the angular velocity in Y-axis, the third motion message is a message for increasing, fixing or reducing the turning scale based on the periodical variation of the analog voltage signal for the angular velocity in X-axis, and the fourth motion message is a message for accelerating, fixing or decelerating movement based on the periodical variation of the analog voltage signal for the angular velocity in Y-axis. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention can be understood in more detail by reading the subsequent detailed description in conjunction with the examples and references made to the accompanying drawings, wherein: 
         FIG. 1  is a functional block diagram of the motion sensing remote control device according to a first embodiment of the present invention; and 
         FIG. 2  is a functional block diagram of the motion sensing remote control device according to a second embodiment of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The present invention may be embodied in various forms and the details of the preferred embodiments of the present invention will be described in the subsequent content with reference to the accompanying drawings. The drawings (not to scale) show and depict only the preferred embodiments of the invention and shall not be considered as limitations to the scope of the present invention. Modifications of the shape of the present invention shall too be considered to be within the spirit of the present invention. 
     Please refer to  FIG. 1 , illustrating a functional block diagram of the motion sensing remote control device according to the first embodiment of the present invention. As shown in  FIG. 1 , the motion sensing remote control device  100  is used for controlling a remote control car  200 , and comprises a motion sensing module  10 , a calculation unit  20 , a motion setting unit  30 , a transmit unit  40  and a receiving unit  50 . 
     Specifically, the motion sensing module  10 , the calculation unit  20 , the motion setting unit  30  and the transmit unit  40  are provided on the motion sensing remote control device  100 , while the receiving unit  50  is provided in the remote control car  200 . 
     The motion sensing module  10  senses a respective physical variation of an angular velocity in X-axis and/or Y-axis for the motion sensing remote control device  100 . The physical variation is converted into an analog voltage signal X for the angular velocity in X-axis and/or an analog voltage signal Y for the angular velocity in Y-axis, and the analog voltage signals X and Y are then transmitted. 
     Preferably, the motion sensing module  10  at least comprises an angular displacement sensor and a signal conversion circuit (not shown). The angular displacement sensor senses a physical variation for the angular velocity in X-axis and/or Y-axis of the motion sensing remote control device  100 , and the signal conversion circuit converts the physical variation for the angular velocity in X-axis and/or Y-axis into the analog voltage signals X and Y, which are transmitted. 
     The above angular displacement sensor is preferably implemented by an MEMS gyroscope, electronic compass, angular velocity meter, or other devices for sensing the horizontal change of an object. 
     The calculation unit  20  is connected to the motion sensing module  10  for receiving the analog voltage signals X and Y from the motion sensing remote control device  10 . Further, the calculation unit  20  previously stores a specific motion prediction algorithm used to calculate a variation of the analog voltage signals X and through, and encodes the variation into a first motion message X′ and/or a second motion message Y′. Here, the first motion message X′ comprises a message for turning rightwise, leftwise or backing, and the second motion message Y′ comprises a message for forward or backward moving or stopping movement. The calculation unit  20  converts the analog voltage signals X and Y into an X-axis pulsed width modulation signal and/or a Y-axis pulsed width modulation signal, calculates a periodical variation for the X-axis pulsed width modulation signal and/or the Y-axis pulsed width modulation signal through the motion prediction algorithm, and encodes a third motion message X″ and/or a fourth motion message Y″ based on the periodical variation for the X-axis pulsed width modulation signal and/or the Y-axis pulsed width modulation signal. It is preferred that the third motion message X″ comprises a message for increasing, fixing or reducing a turning scale, and the fourth motion message Y″ comprises a message for accelerating, fixing or decelerating movement. 
     The motion setting unit  30  is connected to the calculation unit  20  for receiving the first motion message X′, the second motion message Y′, the third motion message X″ and the fourth motion message Y″ from the calculation unit  20 . The first motion message X′, the second motion message Y′, the third motion message X″ and the fourth motion message Y″ are decoded into the first control command C1, the second control command C2, the third control command C3 and the fourth motion control command C4, respectively, which are further transmitted. More specifically, the motion setting unit  30  comprises a built-in programmable and rewritable motion setting database, which includes the first control command C1, the second control command C2, the third control command C3 and the fourth motion control command C4 corresponding to the first motion message X′, the second motion message Y′, the third motion message X″ and the fourth motion message Y″, respectively. 
     The transmit unit  40  is connected to the motion setting unit  30  for receiving the first control command C1, the second control command C2, the third control command C3 and the fourth motion control command C4 from the motion setting unit  30 , which are wireless transmitted. 
     The receiving unit  50  receives the first control command C1, the second control command C2, the third control command C3 and the fourth motion control command C4 such that the remote control car  200  steers its proceeding direction based on the first control command C1 and the second control command C2. That is, the remote control car  200  is controlled to perform the forward moving, backward moving, stopping, turning, running around, S turning and so on. Additionally, the remote control car  200  changes its turning scale and or proceeding speed according to the third control command C3 and or the fourth motion control command C4, thereby controlling the remote control car  200  to accelerate or decelerate, as well as its turning scale. 
     The receiving unit  50  may comprise a control chip (not shown) connected to a motor driving device and a turning system (not shown). Specifically, the control chip is used to control the motor driving device to operate and the turning system to make a turn according to the first control command C1, the second control command C2, the third control command C3 and the fourth motion control command C4. 
     In one embodiment of the present invention, the transmit unit  40  comprises a radio frequency transmit circuit (not shown), and the receiving unit  50  comprises a radio frequency receive circuit (not shown). 
     More specifically, the first motion message X′ is a message for turning rightwise, leftwise or backing, depending on the variation of the analog voltage signal X for the angular velocity in X-axis, the second motion message Y′ is a message for forward or backward moving, or stopping movement, depending on the variation of the analog voltage signal Y for the angular velocity in Y-axis, the third motion message X″ is a message for increasing, fixing or reducing the turning scale, depending on the periodical variation for the X-axis pulsed width modulation signal, and the fourth motion message Y″ is a message for accelerating, fixing or decelerating movement, depending on the periodical variation for the Y-axis pulsed width modulation signal. 
     From the above-mentioned, one aspect of the present embodiment is that the user can control the remote control car  200  to proceed to leftwise or rightwise by just adjusting the X-axis horizontal position of the motion sensing remote control device  100 , or alternatively, the remote control car  200  is controlled to move forward or backward by changing the Y-axis horizontal position of the motion sensing remote control device  100 . 
     Another aspect of the present embodiment is that the calculation unit  20  generates the X-axis pulsed width modulation signal and/or the Y-axis pulsed width modulation signal, and the periodical variation for the X-axis pulsed width modulation signal and/or the Y-axis pulsed width modulation signal is thus obtained through the motion algorithm such that the remote control car  200  is controlled to adjust the turning scale and the proceeding speed. As for the present embodiment, when the X-axis pulsed width modulation signal becomes larger, the third motion message X″ is set to the message for increasing the turning scale, and the motion setting unit  30  then decodes the third motion message X″ into the third control command C3 so as to increase the turning scale for the remote control car  200 . 
     In the present embodiment, the third control command C3 may include a command for increasing, fixing or decreasing the turning scale. Specifically, based on the X-axis pulsed width modulation signal, the third control command C3 determines which one of the above commands is used to generate the third control command C3. The user may preset the relation between the third motion message X″ and the third control command C3 for the motion setting unit  30 . 
     When the X-axis pulsed width modulation signal becomes smaller, the third motion message X″ is set to the message for decreasing the turning scale. As long as the relation between the third motion message X″ and the third control command C3 is preset in the motion setting database, the motion setting unit  30  can generate the third control command C3 for decreasing the turning scale such that the turning scale of the remote control car  200  is decreased. 
     With the above embodiment, the fourth control command may also refer to the period of the Y-axis pulsed width modulation signal so as to control the speed of the remote control car  200 . For example, the speed of the remote control car  200  is controlled to increase as the period of the Y-axis pulsed width modulation signal becomes longer. On the contrary, the speed decreases when the period of the Y-axis pulsed width modulation signal becomes shorter, or the speed keeps constant if the period does not change. 
     For example, when the user wants to control the remote control car  200  to turn rightwise, the motion sensing remote control device  100  can be switched by a tilt angle in the rightwise and forward direction to cause the motion sensing module  10  to sense the physical variation of the angular velocity in X-axis and/or Y-axis so as to generate the analog voltage signal X for the angular velocity in X-axis and the analog voltage signal Y for the angular velocity in Y-axis, which are transferred to the motion setting unit  30  through the calculation unit  20 . At the same time, the calculation unit  20  calculates the motion locus of the motion sensing remote control device  100  through the motion algorithm. In other words, the calculation unit  20  generates the first motion message X′ for turning rightwise and the second motion message Y′ for forward moving based on the variation of the analog voltage signals X and Y. Then, the motion setting unit  30  decodes the first motion message X′ and the second motion message Y′ to generate the first control command C1 for turning rightwise and the second control command C2 for forward moving such that the remote control car  200  performs the corresponding motion of turning rightwise and moving. 
     At this time, if the user wants to increase the turning scale for forward moving and turning rightwise, the calculation unit  20  may convert the analog voltage signal X for the angular velocity in X-axis and the analog voltage signal Y for the angular velocity in Y-axis into the X-axis pulsed width modulation signal and the Y-axis pulsed width modulation signal, which are transferred to the motion setting unit  30 . The calculation unit  20  thus calculates the motion locus of the motion sensing remote control device  100  through the motion algorithm. That is, the calculation unit  20  generates the third motion message X″ for increasing the turning scale and the fourth motion message Y″ for speeding up according to the X-axis pulsed width modulation signal and the Y-axis pulsed width modulation signal. The motion setting unit  30  further decodes the third motion message X″ and the fourth motion message Y″ to generate the third control command C3 for increasing the turning scale and the fourth control command C4 for speeding up so as to cause the remote control car  200  to perform the specific proceeding effect of fast turning. 
     With the present invention, the problem of time lag for controlling the remote device by the user&#39;s hands in the prior arts, which is caused by triggering the control signal with the control bar, is successfully solved because the user can directly and intuitively control the motion sensing remote control device to make the remote control car to perform the corresponding motion as desired, thereby achieving the purpose of real time control. 
     Therefore, the user can use the gestures to manipulate the remote control car to perform any kind of motion with the help of the motion sensing module  10 , which is synchronously activated with the motion sensing remote control device  100  to generate the signal as long as the angular velocity of the motion sensing remote control device  100  changes. Furthermore, the motion setting unit  30  and the related units automatically perform the function of transferring and controlling the signal such that the remote control car  200  can immediately respond and act. More specifically, the remote control car  200  seems to move synchronously with the user&#39;s gesture in the actual operation, and does not only improve the preciseness of remote control, but also enhance the sense of achievement and the fun for playing the remote control game. 
     Refer to  FIG. 2  showing the functional block diagram of the motion sensing remote control device according to the second embodiment of the present invention. As shown in  FIG. 2 , the second embodiment of the present invention additionally comprises a display unit  60 , which is provided in the motion sensing remote control device  100  and connected to the motion setting unit  30 . The motion setting unit  30  further determines the offset direction for the X-axis angular displacement and/or the Y-axis angular displacement of the motion sensing remote control device  100  based on the analog voltage signal X for the angular velocity in X-axis and/or the analog voltage signal Y for the angular velocity in Y-axis. At the same time, a display command and/or a vibration command is generated and transmitted by the motion setting unit  30 . The display command from the motion setting unit  30  is transferred to the display unit  60 , which displays the corresponding music or generates the sound effect. 
     More specifically, the offset direction of the X-axis angular displacement of the motion sensing remote control device  100  at least comprises a clockwise or counter clockwise rotation in X-axis, and accordingly, the offset direction of the Y-axis angular displacement at least comprises a clockwise or counter clockwise rotation in Y-axis. 
     As for the present embodiment, if the motion sensing remote control device  100  rotates clockwise or counter clockwise in X-axis, the remote control car  200  turns right or left, and if the motion sensing remote control device  100  rotates clockwise or counter clockwise in Y-axis, the remote control car  200  moves backward or forward. The user can preset corresponding display commands for different offset directions such that the display unit performs different music or sound effect according to the display command. 
     With this, when the remote control car  200  turns left, the display unit  60  performs the music or sound effect corresponding to the motion of turning left. Similarly, when the remote control car  200  turns right, the display unit  60  performs the music or sound effect corresponding to the motion of turning right. Furthermore, after appropriate setting, the display unit  60  performs the music or sound effect corresponding to the motion of moving forward or backward when the remote control car  200  moves forward or backward. 
     As shown in  FIG. 2 , the present embodiment further comprises a vibration generation unit  70 , which is provided in the motion sensing remote control device  100  and connected to the motion setting unit  30 . The motion setting unit  30  transfers a vibration command to the vibration generation unit  70 , which is caused to generate a vibration effect. For example, the vibration generation unit  70  is implemented by a vibration generation device. 
     Although the present invention has been described with reference to the preferred embodiments, it will be understood that the invention is not limited to the details described thereof. Various substitutions and modifications have been suggested in the foregoing description, and others will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.