JPH05156851A - Wireless door lock control device for vehicle - Google Patents

Abstract

PURPOSE:To eliminate switch operation by providing a receiver which is provided in a vehicle and generates the radio waves for searching a transmitter, and a transmitter to transmit the radio waves having the specified code by receiving the searching radio waves. CONSTITUTION:Radio waves for searching a transmitter are generated constantly by a receiver 1. When a transmitter 2 receives the searching radio waves on the other hand, the radio waves having the specified code are transmitted. When the receiver 1 receives the radio waves transmitted from the transmitter 2, and a micro-computer 16 makes a judgement that its code coincides with the specified code, a door unlock signal is outputted from an output circuit 17, and the door is unlocked. Successively, after transmission of the radio waves from the transmitter 2 is completed, the door lock signal is outputted from the output circuit 17 after the specified time, and the door is locked. This allows the door locking condition of a vehicle to be controlled automatically only by having a transmitter without realizing any switch operations.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle wireless door lock control device, which controls locking / unlocking of a vehicle door according to the presence or absence of radio waves transmitted from a transmitter held by a driver. Wireless door lock control device for vehicle.

[0002]

2. Description of the Related Art Conventionally, as a wireless door lock control device for a vehicle of this type, (1) a driver operates a button of a transmitter to transmit a radio wave having a predetermined code, and the code is specified. A device that locks or unlocks the car door when it matches the code, or (2) the driver has a transmitter and presses a switch installed anywhere on the vehicle to receive the signal on the vehicle side. A radio wave from a device, and the transmitter transmits a radio wave with a predetermined code by receiving the radio wave from the receiver, and if the code matches a specific code, the car door is closed. A device for locking or unlocking is considered. However, in the related art as described above,
When attempting to lock or unlock the door, some kind of switch operation is required, and there is a problem that the vehicle battery (battery on the receiver side) and the battery on the transmitter side cannot be ignored. It was

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and by eliminating the switch operation as described above, the door lock control device becomes a more convenient system. The vehicle battery and the battery on the transmitter side are reduced in consumption, and the door is not likely to be unlocked when the driver is inside the vehicle (for example, while the vehicle is traveling).

[0004]

According to the present invention, in order to solve such a problem, a receiver mounted on a vehicle for generating a radio wave for transmitter search and a predetermined receiver by receiving the radio wave for search. Characterized in that the door is unlocked when the receiver side determines that the code of the transmitted radio wave matches a specific code. A wireless door lock control device for a vehicle is provided.

Further, according to the present invention, there is provided a door lock control device in which the electric wave for the transmitter search is intermittently generated, and at that time, as an intermittent cycle of the electric wave for the transmitter search. , A door lock control device in which the intermittent cycle during which the transmitted radio wave is received is longer than the intermittent cycle during which the transmitted radio wave is not received, or the radio wave for transmitter search is generated. There is also provided a door lock control device that prevents the transmission radio wave from being transmitted while the transmission search radio wave is being interrupted, and transmits the transmission radio wave while the transmitter search radio wave is interrupted.

Further, according to the present invention, when it is detected that the driver is in the vehicle, the door lock control device for stopping the generation of the radio wave for the transmitter search, and such a door. There is also provided a door lock control device which is a lock control device and is adapted to restart the generation of the radio wave for the transmitter search when it is detected that the driver has left the vehicle.

[0007]

According to the above construction, the door can be unlocked only by the driver holding the transmitter without any switch operation, and the receiver on the vehicle side transmits the transmission code from the transmitter. Since the door can be automatically locked after the signal is no longer received, the door lock control device can be more convenient.

Further, according to the above construction, the radio wave for the transmitter search is intermittently generated, so that the consumption of the vehicle battery and the battery on the transmitter side can be reduced, and the driver is installed in the vehicle. If it is detected that the transmitter search radio wave is stopped, for example, there is no possibility that the door will be unlocked while the vehicle is traveling. In this case, the driver will move away from the vehicle. It is also possible to restart the generation of the radio wave for searching the transmitter from when the vehicle is parked (for example, when the vehicle is parked).

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the entire structure of a door lock control device as one embodiment of the present invention. Reference numeral 1 is a receiver mounted on the vehicle side, which is a battery power source 11 and a radio wave for searching the transmitter. Via a transmission circuit 12 for generating a signal, a reception circuit 13 for receiving a radio wave having a predetermined code transmitted from the transmitter 2 of the driver, and an input circuit 15 for determining whether the door is locked or unlocked. A lock / unlock detection switch (for example, it is turned off in the locked state and turned on in the unlocked state) 14 for notifying the microcomputer 16 of the above, the microcomputer 16, the output circuit 17 connected to the output side thereof, and the like. To be done. Reference numeral 18 denotes an antenna for the receiving circuit 13, but the transmitting circuit 12 is also usually provided with a small antenna.

On the other hand, reference numeral 2 denotes a transmitter which a normal driver has, which is a battery power source 21, a receiver circuit 22 for receiving a transmitter search radio wave generated from the receiver 1 side, and the receiver circuit 2.
2, a transmission circuit 23 for transmitting a radio wave having a predetermined code to the receiver 1 side in response to the reception of the search radio wave, an iD code generator 24, and the like. A small antenna is usually attached to each of the receiver circuit 22 and the transmitter circuit 23 on the transmitter side.

Here, the receiver 1 constantly generates a radio wave for the transmitter search, and when the transmitter 2 receives the search radio wave (search signal) from the receiver 1, the radio wave has a predetermined code. (Door unlock signal) is transmitted. When the receiver 1 receives the radio wave (code signal) transmitted from the transmitter 2 and determines that the code matches a specific code, the output circuit 17 outputs the door unlock signal. Is output to unlock the door. Then, after a certain time after the transmission of the radio wave (code signal) from the transmitter 2 (hence, the reception thereof) is stopped, a door lock signal is output from the output circuit 17 to lock the door. In this way, when the driver comes within the receiving range of the search radio wave generated from the receiver 1, the radio wave having the predetermined code is automatically transmitted from the transmitter 2 of the driver to the receiver side. Since it is transmitted, the door can be unlocked without any switch operation, and when the driver leaves the search radio wave reception range, the radio wave with the predetermined code is transmitted. There is no, and this automatically locks the door.

FIG. 2 is a flow chart showing an example of the operation procedure of the device (microcomputer 16) shown in FIG. 1, which starts at step 1 and at step 2 the transmitter search signal ( (Search radio wave) is generated, and it is determined in step 3 whether or not a radio wave having a predetermined code (a code matching the code specified by the receiver) is received from the transmitter side. If yes (reception), the process proceeds to step 4 to determine whether or not the door is locked. If yes, door unlock output is made in step 5, and if no (door unlock), it remains as it is. It is said that. On the other hand, if the determination in step 3 is NO (no reception), step 6
Then, it is determined whether the door is unlocked or not. If the answer is yes, the door lock is output in step 7, and if the answer is no (door lock), the door is left as it is.

FIG. 3 is a timing chart showing another example of the operation of the apparatus shown in FIG. 1, in which the transmitter search signal (search radio wave) is intermittently generated as shown in FIG. 3 (A). It was made to let. Then, the transmitter that has received the search signal also transmits the transmission radio wave having the predetermined code while the search signal is being received, as shown in FIG. That is, when the driver comes within the reception range of the search radio wave, the door is unlocked by the radio wave transmitted from the transmitter of the driver as shown in FIGS. 3B and 3C, and 3 (B) and
As shown in (C), the radio wave transmitted from the transmitter disappears, and the door is locked after a predetermined time. In this case, it suffices if the driver can unlock the door before the driver approaches the vehicle and comes in front of the door, and it is not necessary to continuously generate the search signal. It is designed to reduce the consumption of the vehicle side battery and the transmitter side battery. The ON / OFF cycle of the transmitter search signal is, for example, 1 second as shown in the flowchart of FIG. 4 below.

FIG. 4 shows the apparatus shown in FIG.
The operation procedure (of the microcomputer 16) when operated as shown in FIG.
It starts in step 1, initialization processing is performed in step 2, the timer is started in step 3, and step 4
Then, the transmitter search signal is generated for 0.5 seconds, for example, from the start of the timer (that is, the search signal ON period in FIG. 3A is set to 0.5 seconds), and step 5
Then, it is determined whether or not the radio wave having the predetermined code is received from the transmitter side according to the generated search signal. Then, steps 6 to 9 are performed according to the determination result.
After the processing (corresponding to steps 4 to 7 in FIG. 2) is performed, it is determined in step 10 whether or not the timer has elapsed for 1 second, and if YES, the timer is reset in step 11 ( That is, the process returns to step 3 (on / off cycle of the transmitter search signal is set to 1 second).

FIG. 5 is a timing chart showing still another operation example of the apparatus shown in FIG. 1, in which the intermittent period of the transmitter search signal is set to the transmitter as shown in FIG. 5 (A). The period until the transmission radio wave (transmission code) from the side is received is short, and the period after the transmission code is received is long (therefore, the period of the transmission code transmitted only while receiving the search signal is also as shown in FIG. (It becomes the long cycle as shown in (B)).

Also in this case, when the driver comes within the receiving range of the search radio wave, as shown in FIGS. 5B and 5C, the radio wave (transmission code) transmitted from the transmitter of the driver is transmitted. ), The door is unlocked, and when the driver moves away from the reception range of the search radio wave, the radio wave (transmission code) transmitted from the transmitter is transmitted as shown in FIGS. 5B and 5C. ) Disappears and the door is locked after a predetermined time. In this case, it is necessary to shorten the cycle of the search signal until the receiver accepts the transmission code, but after the reception, the door is unlocked, and when the transmission code is no longer accepted, the door lock control is stopped. Therefore, there is no problem even if the search signal is switched to a long cycle while receiving the transmission code. Therefore, in this example, as described above, the intermittent period of the transmitter search signal is set to be a short period until the transmission code is received, and is set to be a long period after the transmission code is received. It is supposed to do. The ON / OFF cycle of the transmitter search signal is, for example, 1 second cycle until the transmission code is received (while the transmission code is not received), as shown in the flowchart of FIG. 6 below. After the acceptance (while the transmission code is accepted), the cycle is, for example, 5 seconds.

FIG. 6 shows the apparatus shown in FIG.
The operation procedure (of the microcomputer 16) when operated as shown in FIG.
Steps 1 to 9 are step 1 in FIG.
It corresponds to step 9. When the route of steps 6 and 7 is taken (that is, when the door is unlocked by receiving the above transmission code),
In step 10, the flag is set to "1". Next, in step 11, it is determined whether or not the flag is "1". If the result is yes (that is, the door is unlocked by receiving the transmission code), it is determined in step 12 that the timer has passed 5 seconds. If it is determined that the timer is reset in step 14, the search signal is
Seconds cycle). On the other hand, when the flag is "0" in the above step 11 (that is, when there is no transmission code and the door is locked), when it is determined in step 13 that the timer has passed one second, step 14 The timer is reset at (that is, the search signal is set to 1
Seconds cycle). Next, in step 15, the flag is set to "0" and the process returns to step 3.

FIG. 7 (A) shows the entire structure of a door lock control device as another embodiment of the present invention.
The difference from the device shown in FIG.
8 is commonly used for the transmitter circuit 12 and the receiver circuit 13, while the antenna 25 on the transmitter 2 side is also commonly used for the receiver circuit 22 and the transmitter circuit 23.

FIG. 8 is a timing chart showing an example of the operation of the apparatus shown in FIG. 7, which is shown in FIGS.
As shown in (B), for example, the state in which the transmitter search signal is generated on the receiver side and the state in which the transmission code signal from the transmitter is received are alternately set, and accordingly, the transmitter side is set accordingly. However, the state in which the transmitter search signal is received and the state in which the transmission code signal is transmitted are set alternately.

That is, on the receiver side, after the transmitter search signal is generated as shown in FIG. 8A (after the transmitter search signal is turned on), the transmitter search signal is turned off (the search is performed). By switching the receiver to the reception state after the signal falls and then returning to the transmission state (turning on the search signal) after a predetermined period, transmission and reception can be repeated by one antenna 18. On the other hand, on the transmitter side, as shown in FIG. 8 (B), the code signal is received after a predetermined time (that is, when the search signal falls and the receiver is in the receiving state) after receiving the search signal. By transmitting, the same antenna 25 can be repeatedly used for transmission and reception. Then, when the driver comes within the reception range of the search signal, FIG. 8B and FIG.
As shown in FIG. 8C, when the door is unlocked by the radio wave (transmission code signal) from the transmitter of the driver, and when the driver leaves the range of the search radio wave, FIG. As shown in FIGS. 8B and 8C, the radio wave transmitted from the transmitter disappears and the door is locked after a predetermined time. In this case, in this example, the state in which the search signal is generated and the state in which the transmission code signal is received are set alternately on the receiver side, while the state in which the search signal is received on the transmitter side and the transmission code accordingly Since the state of transmitting signals is set alternately, the transmitter / receiver circuit can be configured by one common antenna (18 and 25) on the receiver side and the transmitter side, respectively, and at the same time, each battery Power consumption can also be reduced.

As described above, FIG. 7B shows an example of the circuit configuration on the transmitter 2 side for sequentially setting the search signal reception state and the subsequent transmission code signal transmission state alternately. When the search radio wave from the receiver is received by the receiving circuit 22, 26 is triggered by the falling edge of the search radio wave (search signal), for example, for only 1 second,
The power switch SW1 of the receiving circuit 22 is turned off (while the receiving circuit is inactive), the switch SW1 is turned on again to receive the search radio wave, and the same operation is repeated thereafter by a one-shot multivibrator. is there. On the other hand, when receiving the search radio wave, 27 is triggered by the fall of the search radio wave (search signal) and, for example, 0.5 seconds, the power switch SW2 of the transmission circuit 23
Is turned on (during which the transmission code signal as shown in FIG. 8B is transmitted from the transmission circuit), the switch SW2 is turned off again, and the same operation is repeated thereafter. Thus, at the timing shown in FIGS. 8 (A) and 8 (B), the transmitter search signal from the receiver (in this case, its on / off cycle is set to, for example, 2 seconds) and the transmission. A transmission code signal from the machine (in this case, its on / off cycle is, for example, 2 seconds, and is turned on, for example, for 0.5 seconds after the fall of the search signal) is transmitted.

FIG. 9 is a flow chart showing an example of the operation procedure of the apparatus (microcomputer 16) shown in FIG. 7, which starts at step 1, initialization processing is performed at step 2, and timer is performed at step 3. Is started, a transmitter search signal is generated in step 4, and the search signal is output until the elapsed time of the timer is 1 second in step 5. Then, as described above, the transmission code signal is transmitted from the transmitter for, for example, 0.5 seconds after the fall of the search signal. Therefore, when it is detected in step 6 that the elapsed time of the timer has reached, for example, 1.2 seconds, the process proceeds to step 7, and whether a radio wave (code signal) having a predetermined code is received from the transmitter side. It is determined whether or not. Then, steps 8 to 11 (see FIG.
(Corresponding to steps 4 to 7) of
In step 12, it is determined whether or not the timer has elapsed for 2 seconds. If the result is YES, the timer is reset in step 13 (that is, the ON / OFF cycle of the search signal is set to 2 seconds) and the process returns to step 3.

FIG. 10 shows the overall construction of a door lock control device as still another embodiment of the present invention.
The difference from the device shown in (1) is that a vehicle speed sensor 19 is attached to the receiver 1 side. FIG. 11 is a timing chart showing an operation example of the device shown in FIG. 10, and when the vehicle travels at a certain speed as shown in FIG. 11 (A) (that is, shown in FIG. 11 (C)). As described above, when the vehicle speed signal from the vehicle speed sensor 19 rises), the transmitter search signal from the receiver side is stopped (hence, the door is locked accordingly), while the vehicle is stopped and, for example, manual unlock is performed. Then, the generation of the search signal is restarted. The condition for stopping the transmitter search signal is not limited to the vehicle speed signal as described above, but may be any signal as long as the driver can detect and confirm that the driver is in the vehicle compartment. (Indicating that the vehicle is traveling), for example, it may be a signal for detecting that the accessory switch is turned on. Further, the condition for restarting the transmitter search signal is not necessarily limited to the manual unlock as described above, but may be any signal as long as it can detect that the driver has left the vehicle (for example, while parked). For example, it may be a signal for detecting that the accessory switch is turned off and the door is opened.

That is, when the driver comes within the reception range of the search radio wave (transmitter search signal) in FIG.
As shown in FIG. 1 (B), FIG. 11 (D), and FIG. 11 (F), the door is unlocked by the radio wave (transmission code signal) transmitted from the transmitter of the driver, and the driver is in the passenger compartment. When the vehicle enters the vehicle and starts traveling and reaches a predetermined vehicle speed, FIG.
As shown in FIGS. 11A to 11E, when the transmitter search signal is stopped and the door is locked, and then the vehicle is stopped and, for example, the driver manually unlocks and exits the vehicle (for example, 11 (A) and FIG.
As shown in FIG. 11B, the transmission of the search signal is restarted again, and when the driver moves away from the reception range of the search radio wave, as shown in FIG. 11B, FIG. 11D, and FIG. As shown, the radio wave transmitted from the transmitter disappears and the door is locked. As described above, in this example, when the vehicle is traveling (when the driver is in the vehicle interior), such as when the vehicle reaches a certain vehicle speed, the search signal is stopped and the door is automatically locked. Is ensured (the door may be unlocked by the transmitter when the search signal is generated even if the driver locks the door). By stopping, the consumption of each battery power source is reduced, and the risk of door unlocking while the vehicle is traveling is eliminated. Since it is necessary to restart the transmission of the search signal again when the vehicle stops and the driver leaves the vehicle, for example, when the manual unlock is performed (or the accessory switch is turned off as described above, The transmission of the search signal is restarted from (when it is detected that the door of the car has been opened).

FIG. 12 is a flow chart showing an example of the operation procedure of the apparatus (microcomputer 16) shown in FIG. 10, which starts at step 1, initialization processing is performed at step 2, and then step 3 is performed. Through 8
The processing of (corresponding to steps 2 to 7 of FIG. 2) is performed. When the door is locked in steps 7 and 8, the process directly returns to step 3, but when the door is unlocked in steps 5 and 6, a predetermined vehicle speed signal from the vehicle speed sensor is received in step 9 If yes, the process returns to step 3. If yes, it is detected in step 10 whether or not the door is locked, and if yes, the door lock is output in step 11. After that, if the result is YES, the process directly proceeds to step 12, and the process returns to step 9 without the fear that the transmission of the search signal is stopped and the door is unlocked as described above. If the vehicle stops thereafter, the determination in step 9 becomes negative, and the process returns to step 3.

When the transmitter search signal is output intermittently as shown in the timing chart of FIG. 11, steps 3 and 4 in the flow chart of FIG.
And 10, 11 and the like are added, and when the driver leaves the vehicle after the vehicle has stopped and then the search signal output is restarted, a detection step for that (for example, If the answer is yes, go back to step 3 above, and if yes, go back to step 9 above. You can also go back to.

[0027]

According to the present invention, the locked state of the door of the vehicle can be automatically controlled by holding the transmitter without performing any switch operation, and the vehicle battery and the transmitter side can be controlled. It is possible to reduce the consumption of the battery and eliminate the risk that the door will be unlocked when the driver is inside the vehicle (for example, while the vehicle is traveling).

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a door lock control device as an embodiment of the present invention.

FIG. 2 is a flowchart showing an example of an operation procedure of the apparatus of FIG.

FIG. 3 is a timing diagram showing another operation example of the apparatus of FIG.

FIG. 4 is a flowchart showing an operation procedure when the apparatus of FIG. 1 is operated as shown in FIG.

5 is a timing diagram showing still another operation example of the apparatus of FIG.

6 is a flowchart showing an operation procedure when the apparatus of FIG. 1 is operated as shown in FIG.

FIG. 7 is a diagram showing an overall configuration of a door lock control device as another embodiment of the present invention.

8 is a timing diagram showing an operation example of the apparatus of FIG.

9 is a flowchart showing an example of an operation procedure of the apparatus of FIG.

FIG. 10 is a diagram showing an overall configuration of a door lock control device as still another embodiment of the present invention.

11 is a timing diagram showing an operation example of the apparatus of FIG.

12 is a flowchart showing an example of an operation procedure of the apparatus of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Receiver 11 ... Vehicle battery power supply 12 ... Transmission circuit 13 ... Reception circuit 14 ... Lock / unlock detection switch 16 ... Microcomputer 18 ... Antenna 19 ... Vehicle speed sensor 2 ... Transmitter 21 ... Battery power supply 22 ... Reception circuit 23 … Transmitting circuit 25… Antenna

Claims (6)

[Claims] 1. A transmitter, which is mounted on a vehicle and generates a radio wave for a transmitter search, and a transmitter which transmits a radio wave having a predetermined code by receiving the radio wave for a search. A wireless door lock control device for a vehicle, wherein a door is unlocked when the receiver determines that the code of the radio wave matches a specific code. 2. The transmitter search radio wave is generated intermittently, and the transmission radio wave is transmitted in synchronization with the search radio wave generated intermittently.
The vehicle wireless door lock control device according to claim 1. 3. As an intermittent cycle of the radio wave for the transmitter search, an intermittent cycle while the transmission radio wave is received is longer than an intermittent cycle while the transmission radio wave is not received. The wireless door lock control device for a vehicle according to claim 2, wherein: 4. The transmitter search radio wave is generated intermittently, the transmission radio wave is not transmitted while the search radio wave is generated, and the search radio wave is generated. The wireless door lock control device for a vehicle according to claim 1, wherein the transmission radio wave is transmitted while being suspended. 5. A means for detecting that the driver is inside the vehicle is provided, and when it is detected that the driver is inside the vehicle, generation of the radio wave for searching the transmitter is stopped. The wireless door lock control device for a vehicle according to claim 1, wherein the wireless door lock control device is for a vehicle. 6. A transmitter comprising means for detecting that the driver is inside the vehicle and means for detecting that the driver has left the vehicle, and the transmitter when the driver is detected inside the vehicle. The generation of the search radio wave is stopped, and the generation of the transmitter search radio wave is restarted when it is detected that the driver has left the vehicle. The vehicle wireless door lock control device described.