JP3255320B2 - Remote control device for vehicle load - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle load remote control device for remotely controlling a vehicle load such as a door lock mechanism.

[0002]

2. Description of the Related Art Some vehicles such as automobiles are equipped with a so-called wireless door lock device. This means that a transmission circuit is provided inside the key grip of the remote key that can be inserted into the ignition key cylinder and the door key cylinder, and the radio signal is transmitted by operating the transmission circuit by the driver turning on the operation switch Then, the receiving device provided on the vehicle body receives and decodes the radio signal, and when the radio signal is a signal of the identification code specified for the vehicle, the door lock mechanism is operated to open the door. It is configured to lock automatically or release the lock automatically.

[0003] Such a wireless door lock device is
The door can be automatically locked or the lock can be automatically released only by the user operating the operation switch to cause the transmission circuit to perform the transmission operation, which is very convenient in use.

However, recently, a remote controller with a learning function which receives a radio signal, copies its identification code, and transmits the identification code again as a radio signal has been considered. If the radio signal from the remote key is intercepted by the abuse of the controller, the door of the automobile can be unlocked by the radio signal from the remote controller regardless of the legitimate remote key. was there.

For this reason, conventionally, a plurality of types of identification codes are stored in both a transmission circuit on the remote key side and a receiving device on the vehicle body, and transmission / reception of a radio signal (identification code) between the transmitting circuit and the receiving device. A so-called rolling code type wireless door lock device has been developed in which both identification codes are cyclically changed in a predetermined order every time the operation is performed.

[0006]

In the conventional configuration, there is a synchronous relationship between the transmission order of the identification codes from the transmission circuit and the collation order of the identification codes on the receiving device side. For example, in the case where the operation switch of the remote key is not required and the radio signal is transmitted by being carelessly operated, or in the case where the transmitted radio signal is not received by the receiving device on the vehicle body side, Even though the radio wave signal is not received by the receiver on the vehicle body, only the transmission order of the identification codes on the remote key side is changed, so that the synchronization relationship is deviated and remote operation becomes impossible. Therefore, in such a case, it is necessary to repeatedly operate the operation switch until the identification code transmitted from the transmission circuit on the remote key side matches the identification code in the vehicle-side receiving device that is waiting for verification. There is an extremely troublesome trouble.

In order to eliminate such a problem, a response signal is transmitted from the receiver on the vehicle body side to the remote key side to change the identification code when the received code matches the identification code waiting for verification. However, in this case, it is necessary to provide both the remote key and the vehicle body with a transmission / reception function, which complicates the configuration.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to prevent illegal acts caused by interception of an airborne signal from a remote key, and to transmit an identification code on the remote key side. Even if the synchronization relationship between the identification code of the vehicle and the verification of the identification code on the vehicle body is shifted, the corresponding identification code can be verified on the receiving side regardless of this, and it can be determined that the remote key is a legitimate remote key. And
An object of the present invention is to provide a remote control device for a vehicle load that does not have a complicated structure.

[0009]

According to the present invention, there is provided a remote control device for a vehicle load, comprising: an operating means provided on a remote key;
The remote key is provided, and a plurality of identification codes are sequentially assigned with a corresponding number of count codes and combined to form a code signal, and a reset code is added to a code signal corresponding to the end of the count code. Key-side storage means for storing a plurality of code signals, and transmission means for cyclically reading the code signal from the key-side storage means and transmitting it as an airborne signal each time the operation means is operated Receiving means provided on the vehicle body for receiving the airborne signal; vehicle-side storage means provided on the vehicle body and storing the same plurality of code signals as the key-side storage means; When a reception signal from the means is given, a reception count code included in the reception signal and a current set count code set in the vehicle body side storage means are provided. If the two count values match or the count value of the received count code is larger than the count value of the set count code, the identification code of the code signal corresponding to the count value of the received count code is changed to the vehicle body. Counting code collating means read from the side storage means, collating the received identification code contained in the received signal by the receiving means with the identification code read by the counting code collating means, A detection signal is output, and the set count code of the count code collating means is set to the next count code of the count value of the received count code. And an identification code collating means for setting a counting code corresponding to the identification code collating means. When the number code is set to the next count code of the count value of the reception count code, if a reset code is added to the reception identification code, the count code to be set is set to the first of the plurality of code signals. This is characterized in that it is configured to be set to one having the counting code of.

[0010]

According to the load remote control device for a vehicle of the present invention,
On the remote key side, the transmission means reads the code signal from the key side storage means and transmits it as an airborne signal each time the operation means is operated. This allows
The transmitted code signal is transmitted as a code signal with a corresponding identification code such that the count value of the count code is gradually increased every time the operation means is operated.

On the vehicle body side, the counting code collating means collates the received counting code of the code signal received by the receiving means with the set counting code currently set in the vehicle body side storing means. If the count values match, the identification code corresponding to the set count code is read from the vehicle-side storage means, and if the count value of the received count code is advanced, the received count code at that time is read. Is read out from the vehicle body side storage means. If the count value of the set count code is ahead of the count value of the received count code, the collation operation is stopped ignoring the received code signal.

Next, the identification code collating means collates the identification code read by the counting code collating means with the received identification code included in the received code signal. Output
At this time, at the same time, the count code set in the vehicle body side storage means is advanced to a count value corresponding to the next value of the count value of the reception count code and set. In this case, when the reset code is added to the reception identification code, the identification code collating means returns the count value of the reception count code to the initial setting.

On the other hand, the identification code collating means does not output a coincidence detection signal when the identification codes are not coincident with each other, and at this time, receives the count code set in the vehicle body side storage means at the same time. The count value is returned to the count value corresponding to the previous count value and set, and the collation operation ends.

As a result, when a normal code signal is transmitted from the remote key, careless operation of the remote key causes the counting code to gradually advance, and the remote key and the vehicle are synchronized. Even if the vehicle cannot be detected, the identification code can be collated by one receiving operation on the vehicle side to output a coincidence detection signal.
If the signal is not a legitimate code signal, it can be canceled.

That is, even if the airborne signal transmitted from the remote key is intercepted and the code signal is illegally copied to decode the count code and the identification code contained in the code signal, the next count code Since the identification code is different only by simply progressing, the identification code collating means does not output the coincidence detection signal, so that the security against interception of the transmission signal is very high.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows an outline of the overall configuration. The remote key 1 comprises a key plate 2 and a key grip 3 for supporting the key plate. The key grip 3 is provided with operation buttons 4 as operation means. A transmission circuit 5 as transmission means is provided. Then, as described later, when the operation switch 4 is operated, the transmission circuit 5
Transmits a code signal including an ID code as an identification code as a radio signal as an airborne signal.

A receiving device 6 provided on the vehicle side receives an airborne signal via an antenna 7, and has an input terminal connected to an IG key position switch 8 provided on an ignition key cylinder. The IG key ACC switch 9 is connected so that a key insertion detection signal is input and a detection signal of an ignition ACC rotation position is input. The receiving device 6
Is connected to a door courtesy switch 10 for detecting opening and closing of a door, and a reset switch 11
Is connected.

On the other hand, an output terminal of the receiving device 6 has a door lock device 12 for electrically driving a door lock mechanism (not shown) and an alarm device 1 for performing a notification operation.
3 are connected, and each operates according to a control signal given from the receiving device 6. in this case,
The alarm device 13 has a remote key 1 as described later.
When a radio signal is received a predetermined number of times from, for example, the key plate of the remote key 1 is
The notification operation is performed at the time when is inserted.

FIG. 2 shows the electrical configuration of the transmission circuit 5 provided on the remote key 1 side. That is, the switch circuit 14 is a key-side address counter (not shown).
A battery 15 is connected to the power input terminal, and an operation switch 16 that is turned on in response to the operation of the operation button 4 is connected to the input terminal. The switch circuit 14 outputs a switch control signal from a control output terminal every time the operation switch 16 is turned on, and outputs a DC power supply voltage of the battery 15 from a power supply output terminal as a control power supply voltage of each circuit. ing.

The count output terminal of the switch circuit 14 is connected to an address designation terminal of a key memory 17 as a key storage means to supply a count signal to the address output terminal. The control output terminal of the switch circuit 14 is connected to each control input terminal of the clock circuit 18, the count code shift register 19, the ID code shift register 20, and the oscillation circuit 21.

The key-side memory 17 stores N ID codes C1, C2,..., CN as a plurality of types of identification codes, and counts a count value k for these ID codes.
, For example, "1", "2",
.., And are stored in association with the count code p so as to increase by "N" and "1". These count codes p are stored in the count code storage unit 17a, and the ID code C
(K) (k = 1, 2,..., N) is the ID code storage unit 17
b. Further, the ID code C (N) in which the count value k of the count code p is “N” is stored in a state where a unique reset code RST is added to the ID code CN.

When a count signal is supplied from the switch circuit 14 to the address designation terminal, the corresponding count code p is output to the count code shift register 19, and the corresponding ID code C (k) is shifted. The data is output to the register 20.

The clock circuit 18 outputs a clock signal from an output terminal when a switch control signal is supplied from the switch circuit 14, and the output terminal is connected to a clock input terminal of a count code shift register 19. ing. Also, the counting code shift register 19
Are sequentially shifted and output the contents of each bit of a code signal CD (k) including a count code p and an ID code C (k) output from the key side memory 17 every time a clock signal is supplied from the clock circuit 18. The output terminal is connected to the modulation input terminal of the modulation circuit 22.

The modulation circuit 22 has its carrier input terminal connected to the output terminal of the oscillation circuit 21, and its output terminal connected to the antenna 24 via the output circuit 23, and receives the carrier from the oscillation circuit 21. The signal is modulated by the code signals from the count code shift register 19 and the ID code shift register 20, and the modulated signal is transmitted from the antenna 24 via the output circuit 23 as a radio signal as an airborne signal. The antenna 24 actually uses the key plate 2 of the remote key 1.

FIG. 1 shows an electrical configuration of a receiving device 6 provided on the vehicle body side of an automobile which is a vehicle. That is, the receiving circuit 25 demodulates a code signal from a radio signal received by the antenna 7 and outputs the demodulated code signal from an output terminal as a received code signal.
6 and each input terminal of the waveform shaping circuit 27.

The power supply control circuit 26 has a power supply input terminal connected to the vehicle battery 28 and
When a reception code signal is supplied from the power supply, the power is supplied from the battery 28 and the control power supply voltage for each circuit is output from the power supply output terminal. Also, the waveform shaping circuit 2
Reference numeral 7 designates the count code transmitted from the transmission circuit 5 of the remote key 1 as a reception count code p by shaping the waveform of the reception code signal from the reception circuit 25,
A reception code signal CD (k) whose code is a reception ID code C (k) is output from an output terminal. The output terminal is connected to a reception code detection synchronization circuit 29 and a reception code shift register 30.

The reception code shift register 30 includes a count code shift register 31 and an ID code shift register 32. The count code shift register 31 stores a reception count code p of the reception code signals supplied from the waveform shaping circuit 27. The received ID code C (k) is input to the ID code shift register 32.

When a reception code signal is supplied from the waveform shaping circuit 27, the reception code detection synchronization circuit 29 outputs a control signal from a control output terminal. Connected to terminal. The clock circuit 33 outputs a clock signal from an output terminal when a control signal is supplied from the reception code detection synchronization circuit 29. The output terminal is connected to the clock input terminal of the reception code shift register 30. I have.

When a clock signal is supplied from the clock circuit 32, the reception code shift register 30 receives the reception count code p and the reception count code p input from the waveform shaping circuit 27 in each of the count code shift register 31 and the ID code shift register 32. Receive ID code C
The contents of each bit of (k) are sequentially shifted and output from each data output terminal.

The matching circuit 34 includes a counting code matching circuit 35 as counting code matching means and an ID code matching circuit 36 as identification code matching means.
The reception code input terminal of the count code matching circuit 35 is connected to the data output terminal of the count code shift register 31,
The reception ID code input terminal of the ID code verification circuit 36 is I
It is connected to the data output terminal of the D code shift register 32.

Body-side memory 37 as vehicle-side storage means
Stores the same code signal CD (K) as the key memory 17 of the remote key 1. That is, N ID codes C1, C
2,..., CN, and correspond to the count code P such that the count value K increases by “1” to “1”, “2”,. Let me remember. These count codes P are stored in the count code storage unit 37a, and the ID code C (K) is
It is stored in the code storage unit 37b. The ID code C (N) whose count value K of the count code P is “N” has I
It is stored in a state where a unique reset code RST is added to the D code CN.

The above-described reset switch 11 is connected to the vehicle body side memory 37, and the count value k in the count code storage section 37a is set to "1" by the reset signal given from the reset switch 11. Is specified as follows. The data output terminal of the counting code storage unit 37a is connected to the counting code collating circuit 3
5 is connected to another data input terminal, and when a read signal is given, reads out and outputs the count code P specified at that time. The corresponding count code P is output.

The data output terminal of the ID code storage section 37b is connected to the data input terminal of the ID code collation circuit 36. When a read signal is given from the ID code collation circuit 36, the data output terminal is designated by the count code P at that time. Code C corresponding to the code signal CD (K) of the counted value K
(K) is output to the ID code collating circuit 36.

When a reception code match signal is given as a control signal from the ID code matching circuit 36 of the matching circuit 34, the door lock control circuit 38 locks or unlocks the door lock device 12 as described later. By applying a signal to operate a door lock mechanism of the vehicle as a vehicle load (not shown), the operation of locking or unlocking the door of the vehicle is performed.

As will be described later, the alarm control circuit 39 informs the alarm device 13 when an alarm control signal is given from the ID code collation circuit 36 when a radio signal from the remote key 1 is received a predetermined number of times. It outputs a control signal for performing the operation.

Next, the operation of the present embodiment will be described with reference to a flowchart of a control program shown in FIG. That is, in the initial state of the apparatus (equipment initial state), when the operation button 4 of the remote key 1 is first turned on, the operation switch 16 of the transmission circuit 5 is turned on.
Is turned on, and the designated count value k of the count code p of the switch circuit 14 is set to “1”. In this state, the reset switch 11 on the vehicle body side is operated in advance, the designated count value K of the count code P is set to “1” in the count code storage unit 37a of the vehicle body side memory 37, and the synchronous state is established. I do.

Therefore, for example, if the operation button 4 on the remote key 1 side is operated in the initial state, the designated code value k of the count code p is set to “1” in the count code shift register 19 by turning on the operation switch 16. In response to this, the key-side memory 17 outputs the count code p having the count value k of “1” from the count code storage unit 17 a to the count code shift register 19. The ID code C (1) corresponding to the count value k of “1” is output from the ID code storage unit 17b to the ID code shift register 20.

The count code shift register 19 and the ID code shift register 20 output the code signal CD (1) obtained by synthesizing the count code and the ID code C (1) to the modulation circuit 22 to convert the code signal CD (1) into a radio signal obtained by modulating a carrier wave. The signal is converted and transmitted from the antenna 24 via the output circuit 23. As a result, the antenna 7 on the vehicle body receives the radio signal, and the receiving circuit 25 performs a receiving operation based on the signal and gives the output signal to the power control circuit 26. Is output, so that the circuits on the vehicle body side start operating.

That is, in the receiving device 6 on the vehicle body side, the received code signal CD (k) (in this case, k = 1) input through the waveform shaping circuit 27 is input to the received code shift register 30, The received code signal CD
(K) reception count code p (count value k = 1 in this case)
Is given to the count code shift register 31 and the reception ID
The code C (k) is input to the ID code shift register 32 and stored. On the other hand, the power control circuit 26
Outputs the control power supply voltage, the matching circuit 34 mainly composed of a microcomputer starts the control program shown in FIG.

First, the collation circuit 34 reads the received code signal CD (k) from the received code shift register 30 in step S1. At this time, the counting code matching circuit 35 reads the received counting code p from the counting code shift register 31, and the ID code matching circuit 36 reads the received ID code C (k) from the ID code shift register 32. Next, the matching circuit 34
In step S2, the count code P of the count value K (in this case, K = 1) currently specified in the vehicle body side memory 37
Is read out to the counting code collating circuit 34.

In step S3, the collation circuit 34 determines the reception count code p and the count values k and K of the read count code P.
To determine whether the reception count code p is smaller. Here, first, it is assumed that the code signal CD is transmitted in a state synchronized with the authorized remote key 1, so that the count values k and K are the same value (k = K
= 1), the collation circuit 34 determines “NO” in step S3, and shifts to step S4.

Subsequently, since the count value k of the received count code p is equal to the count value K of the read count code P in step S4, the collation circuit 34 determines "YES" and proceeds to step S5. And I corresponding to the counting code P
The D code C (K) is read from the vehicle body side memory 37, and in the next step S6, the already read reception ID code C
It is checked whether (k) is equal to the ID code C (K) just read from the vehicle body side memory 37.

Then, the collation circuit 34 determines that the regular reception ID
If the code C (k) has been read, the collation results should match, so that "YES" is determined in this step S6, and a step S7 follows. Here, the ID code C ( It is determined whether or not k) is obtained by adding a unique reset code RST to the ID code CN. In this case, since the ID code is still C1, the collation circuit 34 determines “NO” and returns to step S8.
Then, the count value K of the count code P specified in the vehicle body side memory 37 is compared with the count value K of the count code P that has just been collated, and the count value “K + 1” (in this case, K + 1 =
In step S9, a match detection signal indicating that the matching results match is output to the door lock control circuit 38, the program ends, and the program returns to the main program.

Returning to the main program, the receiving device 6
Outputs a lock signal or an unlock signal as a control signal to the door lock device 12 to cause the door lock mechanism to perform a lock operation or an unlock operation.

In this case, when the door lock mechanism locks the door of the automobile, the door lock control circuit 38 recognizes the coincidence detection signal as an unlock signal and causes the door lock device 12 to release the lock. In the state where the door lock mechanism unlocks the door, it outputs a signal indicating that the coincidence detection signal is a lock signal and causes the door lock device 12 to perform a lock operation.

Thereafter, similarly, every time the operation switch 3 on the remote key 1 side is turned on, the transmission circuit 5 outputs
The designated count value k of the count code p in the key-side memory 17 is sequentially increased to “2”, “3”,..., “K”,.
1 "and read out the count code p, and the ID codes C2, C3,..., C corresponding to each count code p.
,..., CN-1 are sequentially read and added, and the code signals CD (2), CD (3),.
, CD (N-1) is converted into a radio signal and transmitted from the antenna 24.

In the receiving device 6 on the vehicle body side,
Upon receiving the reception code signal CD (k), the control program is started in the same manner as described above, and steps S1 to S8 are executed. The designated count value K of the count code P is sequentially changed from the vehicle body side memory 37 to "2", "3". , ..., "k", ..., "N-1"
, And the ID codes C2, C3,..., Ck,..., CN-1 corresponding to the count codes P are sequentially read and collated, whereby the remote key 1 and the receiving device 6 are read. The collation operation is performed in a state where the synchronous relationship between the two is maintained.

When the count value k of the count code p of the code signal transmitted from the remote key 1 becomes "N" during the collation operation as described above, the ID at this time is set.
Since the code C (N) is obtained by adding the unique reset code RST to the ID code CN, when the code signal is received, the verification circuit 34 operates as follows.

That is, the collation circuit 34 starts the control program as described above, executes steps S1 to S6, and proceeds to step S7, where it determines "YES". In this case, the matching circuit 34 proceeds to step S10 to set the count value K of the count code P specified in the vehicle body side memory 37 as "1". An alarm control signal is output to the control circuit 39, and the process returns to step S9. Thereafter, in the same manner as described above, the matching circuit 34 outputs a match detection signal indicating that the matching results match in step S9 to the door lock control circuit 38, ends the program, and returns to the main program.

Next, when the operation button 4 on the remote key 1 side is operated carelessly when the lock / unlock operation is not performed, or when the operation button 4 is operated at a position distant from the receiving device 6, the reception is performed. If the operation is not performed, the code signal CD transmitted from the remote key 1 side
Since the count value k of the count code p of (k) is ahead of the count value K of the count code P specified on the receiving device 6 side, the synchronization relationship is shifted. The matching operation in such a case is described below.

In this case, the collation circuit 34 determines "NO" in step S4 in the above-described control program, and shifts to step S12. Here, the matching circuit 34 sends the count value K of the read count code P to the vehicle body side memory 37 to the reception count code p.
, And the ID code C (K) (K = k) corresponding to the count code P is read.
Then, returning to step S5, the same collating operation as described above is performed, and if "YES" is determined in step S6, the program ends through steps S7 to S9.

Thus, even if the synchronization state is broken,
If the regular remote key 1 is operated, the operation of the operation button 4 is performed only once, so that the ID code is recognized as a regular ID code, and the door lock device 12 can be driven. The state will be maintained.

When the collating operation is performed in step S6, the received ID code C (k) and the read I
If the value of the D code C (K) does not match, the transmission signal from the remote key 1 is transmitted to the code signal CD for itself.
Therefore, the determination is “NO” and the output of the match detection signal is not performed, and the process proceeds to step S13. Then, in this step S13, the collation circuit 34 returns the count value K of the read count code P to the count value before reception and designates the count value in the vehicle body side memory 37, and terminates the program.

Thus, the operation when a different code signal is received is canceled, the state is returned to the state before the reception, and the reception collation operation can be performed correctly when the code signal is transmitted from the authorized remote key 1 thereafter. It becomes.

On the other hand, when the door lock device 12 is driven by using a radio wave transmitting means other than the authorized remote key 1, for example, a radio signal transmitted from the remote key 1 is intercepted and its code signal is transmitted. CD (k) is to be used as it is. In this case, the count value k of the count code p included in the code signal CD (k) at the time of interception is already used in the matching operation at that time. In the receiving device 6 on the vehicle side, the value of the count value K of the count code P specified in the vehicle-side memory 37 becomes the next count value “k + 1” at that time. Is set.

In this case, the collation circuit 34 executes step S3 through steps S1 and S2 in the execution of the control program in response to the reception of the radio signal.
ES ", and the program ends without performing the collation operation.

That is, the fact that the reception count code k of the reception code signal is smaller than the count value of the count code K set in the collation circuit 34 means that the code from the remote key 1 will be described later. Since it is impossible for the matching circuit 34 to receive the signal in synchronization, the program is terminated without performing the matching operation assuming that the code signal has been received from another remote key or the like or has been intercepted. is there.

Assuming such a situation, the intercepted code signal is analyzed and the count value k of the count code p is increased by "1" to form a new code signal.
It is conceivable to transmit the code signal as a radio signal. However, in this case, the I
Since the value of the D code C (k) remains as it is, the collation circuit 34 determines “NO” in step S3 and proceeds to step S6 via steps S4 and S5. The value of k) does not match, so that the determination is "NO", the program ends through step S13, and no match detection signal is output.

In the remote key system, the collation operation as described above is performed to execute the door lock device 12.
Is locked, when the receiving device 6 detects that all the doors are closed based on the detection signal from the door courtesy switch 10, the receiving device 6 sets the alert mode for theft prevention.

Although a detailed description is omitted, in this alert mode, when an opening operation of the door is detected by the door courtesy switch 10 in order to prevent an unauthorized intrusion from the outside, an alarm signal is output. A notifying operation is performed such that a horn (not shown) sounds or a light blinks to abandon the illegal act.

In this remote key system, whether or not the key inserted into the ignition key cylinder is the proper remote key 1 is determined based on the code signal CD (k) transmitted from the transmission circuit 5. The normal operation is performed between the time when the IG key position switch 8 detects the insertion of the key plate 2 of the remote key 1 and the time when the IG key ACC switch 9 detects the turning operation to the ACC position. When the code signal CD (k) is input, the start of the engine is permitted.

As described above, in the present embodiment, the code signal CD (k) obtained by cyclically allocating and combining the count code p and a plurality of types of ID codes C1 to CN corresponding to the count code p is provided to the remote key 1 side. Stored in the key side memory 17,
The transmission circuit 5 sequentially transmits the code signal CD (k) as a radio signal in response to the operation of the operation button 4,
On the receiving device 6 side, a vehicle side memory 37 for storing a code signal CD (K) having the same contents as the key side memory 17 is provided. Is larger than the count value K of the count code P set on the receiving device 6, the ID code C (k) corresponding to the received count code p is read and collated.

Thus, even if the operation button 4 of the remote key 1 is inadvertently operated, if the normal remote key 1 is used, the reception device 6 reliably outputs the coincidence detection signal by one operation. In addition to being able to perform a lock or unlock operation, reception of a code signal copied by interception of a transmission signal or the like can be reliably excluded, thereby improving security. You can do it.

In the above embodiment, the case where the count values k and K of the count codes p and P are set to be increased by "1", but the present invention is not limited to this. For example, it is possible to set an increase number of “2” or more, and it is possible not only to increase the number but also to gradually decrease the number.

In the above embodiment, the counting codes p, P
Has been described starting from "1", but the present invention is not limited to this. For example, the continuous large numerical value M1
.. MN by the number of ID codes C (N), and can be set so as to start from the minimum value or the maximum value and then return to the maximum value or the minimum value when returning to the original value. The codes p and P also have a more complicated number configuration, and it is difficult to decode which code signal CD has the unique reset code RST added thereto, so that security can be further improved.

In the above-described embodiment, the operation of locking and unlocking the door lock mechanism is performed by one operation button 4 on the remote key side. The lock operation switches may be separately provided.

In the above embodiment, when the code signal is transmitted a predetermined number of times to the transmission circuit 5 of the remote key 1, a battery consumption signal code for notifying the consumption state of the battery 15 is added to the code signal. When the receiving device 6 receives this, the alarm device 13 informs the user and prompts the user to replace the battery 15 of the remote key 1.

Further, in the above-described embodiment, the door lock mechanism is provided as the vehicle load. Alternatively, an engine starter, a window opening / closing mechanism, or the like may be provided.

In addition, the present invention is not limited to the above embodiment. For example, the airborne signal may be an ultrasonic signal or an infrared signal, and may be appropriately modified without departing from the scope of the invention. Of course, it can be implemented.

[0070]

According to the present invention, there is provided a vehicle load remote control device comprising:
As described above, the remote key is provided with the key-side storage means, and a plurality of identification codes are sequentially assigned with the corresponding number of counting codes to form a code signal by combining the identification codes, and a code signal corresponding to the end of the counting code is provided. A plurality of code signals formed by adding a reset code to a code signal are stored, and the transmission means reads out the code signal from the key-side storage means and transmits it as an airborne signal each time the operation means is operated. The vehicle body side storage means in which the same code signal as the key side storage means is stored is provided on the vehicle body side. The reception code code included in the reception code signal is provided by the count code verification means and the identification code verification means. Is compared with the currently set counting code set in the vehicle body storage means. When the count value of the number code is ahead of the count value of the currently set count code, the identification code corresponding to the count value of the received count code at that time is read from the vehicle body side storage means and included in the received signal. The received identification code is compared with the identification code read by the counting code matching means, and when they match, a match detection signal is output, and the set counting code of the counting code matching means is compared with the received counting code. The count code is set to proceed to the next count value, and when they do not match, the count code matching means is configured to set a count code corresponding to the count value before reception to the count code matching means. When the set count code is set to the next count code of the count value of the receive count code, if a reset code is added to the receive identification code, And configured to set the count code constant to those having an initial count code among the plurality of code signals.

Thus, when a normal code signal is transmitted from the remote key, careless operation of the remote key causes the counting code to gradually advance, and the remote key and the vehicle are synchronized. Even if it is not possible, the vehicle can check the identification code in one receiving operation and output a coincidence signal, and if it is not a legitimate code signal, Even if the code signal is illegally copied by intercepting the airborne signal transmitted from the remote key and deciphering the counting code and the identification code included in the code signal, it can be ignored. Since the identification code is different only by simply making the counting code of step (i) progressive, the identification code collating means does not output a match detection signal.
It has an excellent effect of extremely high safety.

[Brief description of the drawings]

FIG. 1 is an electrical block diagram of a receiving apparatus according to an embodiment of the present invention.

FIG. 2 is an electrical block diagram of a transmission circuit on a remote key side.

FIG. 3 is a block diagram showing an outline of the entire configuration.

FIG. 4 is a flowchart of a control program.

[Explanation of symbols]

1 is a remote key, 4 is an operation button (operation means), 5 is a transmission circuit (transmission means), 6 is a receiving device, 7 is an antenna,
11 is a reset switch, 12 is a door lock device (vehicle load), 13 is an alarm device, 14 is a switch circuit,
Reference numeral 15 denotes a battery, 16 denotes an operation switch, 17 denotes a key-side memory (key-side storage unit), 17a denotes a count code storage unit,
b is an ID code storage unit, 18 is a clock circuit, 19 is a count code shift register, 20 is an ID code shift register, 21 is an oscillation circuit, 22 is a modulation circuit, 23 is an output circuit, 24 is an antenna, 25 is a reception circuit, 26 is a power supply control circuit, 27 is a waveform shaping circuit, 28 is a battery, 29 is a reception code detection synchronization circuit, 30 is a reception code shift register, 31 is a count code shift register, 32 is an ID code shift register, 33 is a clock circuit, 34 is a verification circuit, 35 is a counting code verification circuit (counting code verification means), 36 is an ID code verification circuit (identification code verification means), 37 is a vehicle side memory (vehicle side storage means), 37a
Is a count code storage unit, 37b is an ID code storage unit, 38
Is a door lock control circuit, and 39 is an alarm control circuit.

Continuation of the front page (56) References JP-A-59-134285 (JP, A) JP-A-4-336185 (JP, A) JP-A-1-278671 (JP, A) JP-A-59-206573 (JP) JP-A-7-89344 (JP, A) JP-A-2-282587 (JP, A) JP-A-5-92373 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB Name) H04Q 9/00-9/16 E05B 49/00

Claims (1)

(57) [Claims] 1. An operation means provided on a remote key, and a count signal corresponding to a plurality of identification codes provided on the remote key are sequentially assigned to a plurality of identification codes and combined to form a code signal. A key-side storage unit in which a plurality of code signals configured by adding a reset code to a code signal corresponding to the end of a code are stored; and the code signal is cyclically stored every time the operation unit is operated. Transmitting means for reading from the key-side storage means and transmitting it as an airborne signal; receiving means provided on the vehicle body for receiving the airborne signal; and a plurality of the same as the key-side storage means provided on the vehicle body. Vehicle-side storage means in which a code signal is stored, and when a reception signal from the reception means is given, a reception count code included in the reception signal and Collating the current setting count code set in the side storage unit, if the count value of or received count code both counts match is greater than the count value of the set counter code,
Counting code matching means for reading an identification code of a code signal corresponding to the count value of the reception counting code from the vehicle body side storage means; reading a reception identification code included in a reception signal by the receiving means and the counting code matching means. The identification code is compared with the received identification code, and when they match, a match detection signal is output, and the set count code of the count code matching means is set to the next count code of the count value of the received count code. When there is a mismatch, identification code matching means for setting a count code corresponding to the count value before reception to the count code matching means, wherein the identification code matching means is a set count code of the count code matching means. When a count code following the count value of the receive count code is set, a reset code is added to the receive identification code. The first remote control device for a vehicle load and setting the one having a count code among the plurality of code signal counting code to set the.