JPH07964B2 - Vehicle data communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention performs a door lock or trunk lock unlocking operation using a wireless signal such as an infrared emission signal in a passenger vehicle, for example. The present invention relates to a vehicle data communication device used.

(Prior Art) In a general passenger vehicle, first, in order to lock or unlock the door from the inside of the vehicle, a door lock knob provided on the lining of the door is operated. For example, it is necessary to insert an ignition key, which is also used for starting the engine, into a key cylinder provided on the outer plate of the door and rotate it in the locking or unlocking direction. For this reason, it is very troublesome to unlock the door from the outside of the vehicle with a lot of luggage.

Therefore, recently, even if the key cylinder is not rotated by the ignition key, the unlock command signal transmitted from the small portable transmitter automatically unlocks the door lock mechanism mounted on the vehicle side. An automatic unlocking device to operate is considered. That is, this unlocking device transmits an ultrasonic signal or an optical signal modulated to a specific key code from a portable transmitter, and the transmission signal is received by a receiving unit provided on the vehicle body side. The control unit detects the receiving operation and unlocks the lock mechanism.

(Problems to be Solved by the Invention) However, in the automatic unlocking device having the above-described configuration, the key code of the unlock command signal is specified for each transceiver set, and therefore, for example, the transmitter itself may be lost. Relaxed
Further, even if it is destroyed, it is necessary to replace it in the transceiver set because the receiver side cannot judge the key code match if the transmitter is replaced. Further, the unlocking device having the above-described configuration can only control the operation of the door lock mechanism, and therefore has a drawback of low utility value in comparison with expensive equipment.

INDUSTRIAL APPLICABILITY The present invention does not have to set a specific key code for each transceiver set, and for example, if the transmitter is broken, only the transmitter needs to be replaced, and the operation control function of the door lock mechanism is not used. An object of the present invention is to provide a highly valuable vehicle data communication device.

[Structure of Invention]

(Means and Actions for Solving Problems) That is, the vehicle data communication device according to the present invention is not limited to the transmission function of the lock release signal operated by the battery power source to the transmitter, and the separate solar cell power source. In addition to being equipped with a four arithmetic operation function that operates as described above, the key code numbers stored in the key code memories provided in each of the transmitter and the receiver can be appropriately rewritten.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows an external configuration of the transmitter 11 in the data communication device. The transmitter 11 is configured as an IC card, and the key input unit 12 and the LCD display unit 13 are provided on one side of the transmitter 11. And a solar cell power supply 14 are provided. In addition to the numeric keypad 12a and the function keys 12b for four arithmetic operations, the key input section 12 is provided with a door switch DSW, a trunk switch TSW, and a key code registration switch CRSW. The door switch DSW is a vehicle door lock. It is operated when unlocking the mechanism, and the trunk switch TSW is operated when unlocking the vehicle trunk lock mechanism. Also, key code registration switch CR
The SW is operated when rewriting and registering a new key code for unlocking, and the key code number is input using the ten key 12a after the operation of the registration switch CRSW. Here, 15 is a light emitting unit for transmitting an unlock signal modulated by the registration key code as an optical signal x when the door switch DSW or the trunk switch TSW is operated.

On the other hand, in this transmitter 11, in addition to the solar cell power source 14,
Button-type battery power supplies 16a and 16b are incorporated. That is, the battery power supplies 16a and 16b are switched and used when transmitting a lock release signal that consumes a large amount of power, and the solar battery power supply 14 is switched and used during the four arithmetic operations and the key code number registration.

FIG. 2 shows the internal circuit configuration of the transmitter 11 in FIG. 1 described above. The numeric keypad 12a, the function key 12a, the door switch DSW, the trunk switch T in the key input section 12 are shown.
The SW, the key code registration switch CRSW, the LCD display unit 13, and the solar cell power source 14 are all connected to the CPU 21. This C
Inside the PU 21, there is provided a key code memory 22 in which the key code number for unlocking is stored. Further, a transistor Tr for driving the light emitting unit 15 is connected to the CPU 21 via a modulation circuit 23, and the power source voltage from the battery power source 16 is supplied only to this modulation light emitting circuit.

FIG. 3 shows the circuit configuration of the receiver 31 which receives the unlock signal transmitted from the transmitter 11 on the vehicle body side.
The unlocking optical signal x from the transmitter 11 is received and received by the light receiving unit 32 and supplied to the demodulation circuit 33. The demodulation circuit 33 demodulates the supplied lock release signal, and the transmitter 11
Is to obtain the key code number before modulation. The demodulation circuit 33 includes a key code memory 34, a key code comparison unit 35, a control unit 36, and a key code registration control unit.
37 is connected. The key code number for confirming the validity of the unlock signal is stored in the key code memory 34, and the key code number stored in the key code memory 34 and the demodulation circuit 33 are used. The obtained transmission key code number is compared with the comparison unit 35, and the coincidence determination signal is supplied to the control unit 36. The control unit 36 controls data transfer among the demodulation circuit 33, the key code memory 34, the comparison unit 35, and the key code registration control unit 37, and supplies a key code number match determination signal from the comparison unit 35. When this is done, a lock release command signal is supplied to the vehicle body lock mechanism 38, whereby the vehicle body lock mechanism 38 unlocks the door lock actuator or the trunk lock actuator. On the other hand, the key code registration control unit 37 operates as a data writing control unit when rewriting registration of the key code number stored in the key code memory 34 is performed.

Next, the operation of the data communication device having the above configuration will be described.

First, in order to perform unlock control of the vehicle body door lock using this data communication device, the door switch DS of the transmitter 11 is used.
By operating W, the light emitting unit 15 transmits a door lock release optical signal based on the door lock release key code stored in the key code memory 22. Then, this door lock release signal is received and received by the light receiving section 32 of the receiver 31 arranged on the outer plate of the door, and the door lock unlock transmission key code obtained by the demodulation circuit 33 is the key code. The comparison unit 35 compares the door lock unlocking reception key code stored in advance in the memory 34. Here, when it is confirmed that the transmission key code and the reception key code match, the control unit 36 outputs a door lock release control signal to the vehicle body lock mechanism 38, and the door lock actuator controls the operation in the unlock direction. Will be done. On the other hand, when unlocking the trunk lock, by operating the trunk switch TSW of the transmitter 11, the trunk lock release optical signal based on the key code number for unlocking the trunk lock stored in the key code memory 22. x is transmitted from the light emitting unit 15. The receiver 31 compares the transmission key code obtained through the demodulation circuit 33 with the reception key code for trunk unlock stored in the key code memory 34 in advance in the comparison unit 35, and the key codes match each other. When the determination is obtained, the control unit 36 outputs a trunk lock release command signal to the vehicle body lock mechanism 38. As a result, the trunk lock actuator is unlocked and the trunk lock is released.

Next, the key code memory 22 provided in the transmitter 11 side
Key code memory for the door and trunk unlock key stored in the receiver and the receiver 31 side
The key code registration operation for rewriting the received key code for door and trunk unlock stored in 34 will be described.

First, when the key code registration switch CRSW of the transmitter 11 is operated, the key code memory 22 in the CPU 21 is set to the writable state, and the key code number keyed in by the ten keys 12a in this writable state is the key code memory.
Stored and stored at 22. The key code data newly stored in the key code memory 22 is the modulation circuit.
It is transmitted from the light emitting unit 15 via 23. Where the receiver 31
By previously operating the key code registration control unit 37 in, the key code memory 34 on the receiving side is also set to the writing state, and the transmission key code data from the transmitter 11 is newly received via the demodulation circuit 33. The key code data is stored and stored in the key code memory 34. With this, it is possible to rewrite the key code data for unlocking the transmitter 11 and the receiver 31 side, respectively, even if either the transmitter 11 or the receiver 31 is replaced with a new one. Since the key code numbers can be rewritten and unified as appropriate, it is economical because it is not necessary to replace the transmitter and receiver even in the case of a failure or the like.

On the other hand, it is also possible to perform the four arithmetic operations by using the ten keys 12a, the function keys 12b and the display unit 13 of the transmitter 11. In this case, at the time of the above four arithmetic operations and the rewriting registration of the key code data, the voltage signal supplied from the solar cell power source 15 is used as a power source, and the unlock light signal x and the rewriting key code data are transmitted. , The voltage signal supplied from the battery power source 16 is used as the power source. As a result, even if the automatic unlocking function, the four arithmetic operations function, and the key code data rewriting function are provided, the power consumption by the battery power supply 16 can be suppressed to an extremely low level.

[Effects of the Invention] As described above, according to the present invention, not only the function of transmitting a lock release signal that operates on battery power to the transmitter, but also the four arithmetic functions that operate on separate solar cell power supplies are provided. In addition, the key code numbers stored in the key code memories provided in the transmitter and the receiver are rewritable, so that a specific key code is fixed and set for each transceiver set. Without need
For example, if the transmitter is broken, only the transmitter needs to be replaced, and not only the operation control function of the door lock mechanism but also an economical and highly useful vehicle data communication device can be provided.

[Brief description of drawings]

FIG. 1 is an external configuration diagram showing a transmitter of a vehicle data communication device according to an embodiment of the present invention, FIG. 2 is a configuration diagram showing an internal circuit of the transmitter in FIG. 1, and FIG. It is a circuit block diagram which shows the receiver arrange | positioned with respect to a transmitter at the vehicle body side. 11 ... Transmitter, 12 ... Key input section, 12a ... Numeric keypad, 12b ... Function key, 13 ... LCD display section, 14 ... Solar cell power supply, 15 ... Light emitting section, 16 ... Battery power supply, 22 ... Transmission key code memory, 23 … Modulation circuit, 31… Receiver, 32… Light receiving part, 33
… Demodulator, 34… Key code memory, 35… Comparison section, 36…
Control unit, 37 ... Key code registration control unit, 38 ... Body lock mechanism, DSW ... Door switch, TSW ... Trunk switch, CRSW
… Key code registration switch.

Claims (1)

[Claims] Claim: What is claimed is: 1. A transmitter having a four arithmetic operation function, which transmits a lock release signal based on a key code number stored in a transmission key code memory, and a key for receiving a lock release signal from the transmitter and a key in the release signal. Depending on whether the code number matches the key code number stored in the received key code memory, the receiver that activates the vehicle body locking mechanism and the transmitter equipped with the four arithmetic functions and the unlock signal are transmitted. A solar cell power source and a battery power source, which are separately switched for use, and a key code number registering means capable of appropriately rewriting the key code numbers stored in the key code memories provided in the transmitter and the receiver, respectively. A data communication device for a vehicle characterized by the above.