JPH07184280A - Remote controller for vehicle load - Google Patents

Abstract

PURPOSE:To surely prevent illegal act caused by intercept of a radio wave signal from a remote key through the reception synchronously with a transmission signal from the remote key with simple configuration. CONSTITUTION:Every time an operation button of a remote key is operated, a transmission circuit sends a count code (p) and an ID code C (k) corresponding thereto as a radio wave signal. The count code is set corresponding to N sets of different ID codes to form a code signal. A receiver of a vehicle body stores similar code signals in its memory 37 and reads the received count code (p) and the designated count code P from the memory 37 upon the receipt of the code signal and reads the ID code corresponding to the received count code (p) in the case of count value k>=K for the collation and provides an output of matching detection signal when they are matched and resets the designated count code into the original count code P in the case of dismatching. Even when the code signal is intercepted illicitly, since the receiver does not accept the signal when the corresponding ID code is not set together with the advancement of the count code (p), the security is improved.

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. The transmitter circuit is installed 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 circuit is transmitted by operating the transmitter circuit when the driver turns on the operation switch. Then, the receiving device provided on the vehicle body side receives and decodes the radio wave signal, and when the radio wave signal is the signal of the identification code specified for the car, the door lock mechanism is operated to open the door. It is configured to automatically lock or unlock automatically.

Such a wireless door lock device is
The user can automatically lock the door or automatically unlock the door by simply 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 has been considered, which receives a radio wave signal, copies the identification code, and transmits the identification code again as a radio wave signal. If the controller is abused and the radio signal from the remote key is intercepted, it becomes possible to illegally unlock the car door by the radio signal from the remote controller regardless of the authorized remote key. was there.

Therefore, conventionally, a plurality of types of identification codes are stored in both the transmitter circuit on the remote key side and the receiver device on the vehicle body side, and a radio signal (identification code) is transmitted and received between the transmitter circuit and the receiver 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 each time.

[0006]

In the conventional configuration, the transmission order of the identification code from the transmission circuit side and the collation order of the identification code on the reception side have a synchronous relationship. , For example, when the remote key operation switch is inadvertently operated when the radio signal is transmitted when it is not necessary, or when the transmitted radio signal is not received by the vehicle body side receiver, Even if the receiving device on the vehicle body side does not receive this radio wave signal, only the transmission order of the identification code on the remote key side is changed, and the synchronization relationship is deviated so that the remote operation cannot be performed. 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 reception device on the vehicle side that is waiting for verification. There is a problem that becomes extremely troublesome.

In order to eliminate such inconvenience, when the receiving code from the receiving device on the vehicle body side matches the identification code waiting for verification, a response signal is sent to the remote key side to change the identification code. However, this requires both the remote key and the vehicle body to have a transmitting / receiving function, which complicates the configuration.

The present invention has been made in view of the above circumstances, and an object thereof is to reliably prevent an illegal act due to 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 and the identification code on the vehicle body side is deviated, regardless of this, the corresponding identification code on the reception side can be verified to determine that the key is a legitimate remote key. And moreover,
It is an object of the present invention to provide a remote control device for a vehicle load without complicating the configuration.

[0009]

A remote control device for a vehicle load according to the present invention comprises an operating means provided on a remote key,
The remote key is provided, and a plurality of identification codes are sequentially assigned a corresponding number of count codes to combine them to form a code signal. At the end of the count code, a reset code is added to the corresponding code signal. Key side storage means in which a plurality of configured code signals are stored, and transmission means for cyclically reading the code signal from the key side storage means and transmitting it as an air propagation signal every time the operating means is operated. A receiving means provided on the vehicle body for receiving the aerial propagation signal; a vehicle body storage means provided on the vehicle body and storing a plurality of code signals identical to the key side storage means; When the received signal from the means is given, the received count code included in the received signal and the current set count code set in the vehicle body side storage means If the two count values match and the count value of the reception count code is greater than the count value of the set count code, the identification code of the code signal corresponding to the count value of the reception count code is added to the vehicle body. The counting code collating means read from the side storage means, the reception identification code included in the signal received by the receiving means, and the identification code read by the counting code collating means are collated, and when they match, they are coincident with each other. Outputs a detection signal and sets the count code of the count code collating means to the count code next to the count value of the received count code, and when both do not match, the count value before reception to the count code collating means And an identification code collating means for setting the counting code corresponding to the setting of the counting code collating means. When setting the count code next to the count value of the reception count code, when the reset code is added to the reception identification code, the count code to be set is the first of the plurality of code signals. It is characterized in that it is configured to be set to one having a counting code of.

[0010]

According to the remote control device for a vehicle load of the present invention,
On the remote key side, the transmitting means reads the code signal from the key side storing means and transmits it as an airborne signal every time the operating means is operated. This allows
The code signal to be transmitted is transmitted as a code signal accompanied by 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 count code collating means collates the received count code of the code signals received by the receiving means with the set count code currently set in the vehicle body side storage means, and When the count values match, the identification code corresponding to the set count code is read from the vehicle body side storage means, and when the count value of the reception count code is ahead, the reception count code at that time is read. The identification code corresponding to is read from the vehicle body side storage means. When the count value of the set count code advances with respect to the count value of the received count code, the received code signal is ignored and the matching operation is stopped.

Next, the identification code collating means collates the identification code read by the counting code collating means with the received identification code contained in the received code signal, and when the both coincide with each other, a coincidence detection signal is issued. It will output,
At this time, at the same time, the count code set in the vehicle body side storage means is advanced to the count value corresponding to the next value of the count value of the received count code. In this case, when the reset identification code is added to the received identification code, the identification code collating means returns the count value of the reception count code to the beginning and sets it.

On the other hand, the identification code collating means does not output the coincidence detection signal if the above identification codes are not collated, and at the same time, receives the count code set in the vehicle body side storage means. The count value corresponding to the previous count value is restored and set, and the collation operation ends.

As a result, when a regular code signal is transmitted from the remote key, the count code gradually advances due to careless operation of the remote key, and the remote key side and the vehicle side are synchronized. Even if it is in a state where it can not be obtained, it is possible to collate the identification code and output the coincidence detection signal by one receiving operation on the vehicle side, and moreover,
If it is not a regular code signal, it can be canceled.

That is, even if the air propagation signal transmitted from the remote key is intercepted and the code signal is illegally copied to decode the count code and the identification code included in the code signal, the next count code Since the identification code is different even if the identification code is simply advanced, the identification code collating means does not output the coincidence detection signal, so that the safety against interception of the transmission signal becomes very high.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows an outline of the entire configuration. The remote key 1 is composed of a key plate 2 and a key grip 3 supporting the key plate 2, and the key grip 3 is provided with an operation button 4 as an operation means. A transmission circuit 5 as a transmission means is provided. Then, as will be described later, when the operation switch 4 is operated, the transmission circuit 5
Transmits a code signal including an ID code which is an identification code as a radio wave signal which is an air propagation signal.

The receiving device 6 provided on the vehicle side is adapted to receive an aerial propagation signal via an antenna 7. The input terminal of the receiving device 6 is an IG key position switch 8, which is 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 the ignition ACC rotation position is also input. Also, the receiving device 6
A door courtesy switch 10 for detecting opening / closing of the door is connected to an input terminal of the reset switch 11
Are connected.

On the other hand, at the output terminal of the receiver 6, 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 of them is operated according to a control signal given from the receiving device 6. in this case,
The alarm device 13 has a remote key 1 as will be described later.
When a radio signal is received from the key plate 2 of the remote key 1 to the ignition key cylinder,
The notification operation is performed at the time of inserting.

FIG. 2 shows an 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).
The battery 15 is connected to the power input terminal, and the 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 the control output terminal each time the operation switch 16 is turned on, and outputs the DC power supply voltage of the battery 15 from the power supply output terminal as the control power supply voltage of each circuit. ing.

The count output terminal of the switch circuit 14 is connected to the address designation terminal of the key side memory 17 as the key side storage means and is adapted to give a count signal to it. The control output terminal of the switch circuit 14 is connected to the control input terminals of the clock circuit 18, the count code shift register 19, the ID code shift register 20, and the oscillator circuit 21.

The key side memory 17 stores N ID codes C1, C2, ..., CN as a plurality of types of identification codes, and count values k for these ID codes.
So that there is a one-to-one correspondence, for example, "1", "2",
.. are stored in association with the count code p so as to increase by "N" and "1". Then, 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
It is stored in b. Further, the ID code C (N) whose count value k of the count code p is “N” is stored with the unique reset code RST added to the ID code CN.

When the count signal is applied from the switch circuit 14 to the addressing terminal, the corresponding count code p is output to the count code shift register 19 and the corresponding ID code C (k) is shifted. It is adapted to output to the register 20.

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

The modulation circuit 22 has its carrier wave 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 to receive the carrier wave 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 is transmitted as a radio wave signal as an air propagation signal from the antenna 24 via the output circuit 23. Note that 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 the code signal from the radio wave signal received by the antenna 7 and outputs it as a received code signal from the output terminal.
6 and each input terminal of the waveform shaping circuit 27.

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

The reception code shift register 30 comprises a count code shift register 31 and an ID code shift register 32. The count code shift register 31 receives the 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.

The reception code detection / synchronization circuit 29 is adapted to output a control signal from the control output terminal when the reception code signal is given from the waveform shaping circuit 27, and the control output terminal thereof is the control input of the clock circuit 33. It is connected to the terminal. The clock circuit 33 outputs the clock signal from the output terminal when the control signal is given from the reception code detection synchronization circuit 29, and the output terminal is connected to the clock input terminal of the reception code shift register 30. There is.

When the clock signal is applied 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. Received ID code C
The contents of each bit in (k) are sequentially shifted and output from each data output terminal.

The collating circuit 34 is composed of a count code collating circuit 35 as a count code collating means and an ID code collating circuit 36 as an identification code collating 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 matching circuit 36 is I
It is connected to the data output terminal of the D code shift register 32.

Vehicle side memory 37 as vehicle side storage means
Stores the same code signal CD (K) as the key side memory 17 on the remote key 1 side. That is, N ID codes C1 and C as plural kinds of identification codes
2, ..., CN are stored, and corresponding to the count code P such that the count value K is incremented by “1”, “2”, ... I remember it. The count code P is stored in the count code storage unit 37a, and the ID code C (K) is the ID.
It is stored in the code storage unit 37b. Further, the ID code C (N) whose count value K of the count code P is “N” is I
It is stored in a state in which the unique reset code RST is added to the D code CN.

The above-mentioned reset switch 11 is connected to the vehicle body side memory 37, and the count value k of the count code storage unit 37a is set to "1" by the reset signal supplied from the reset switch 11. It is designed to be specified as. The data output terminal of the count code storage unit 37a is the count code collating circuit 3
5 is connected to another data input terminal and is supplied with a read signal, the count code P designated at that time is read out and outputted, and thereafter, when the count code P is designated from the count code collating circuit 35, A 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 collating circuit 36, and when a read signal is given from the ID code collating circuit 36, it is designated by the count code P at that time. ID code C corresponding to the code signal CD (K) of the count value K
(K) is output to the ID code matching circuit 36.

As will be described later, the door lock control circuit 38 receives a lock code or an unlock signal from the door lock device 12 when a received code match signal as a control signal is given from the ID code check circuit 36 of the check circuit 34. By giving a signal to operate a vehicle door lock mechanism as a vehicle load (not shown), the vehicle door is locked or unlocked.

Further, 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 collating circuit 36 at the time when the radio signal from the remote key 1 is received a predetermined number of times. It outputs a control signal for performing an operation.

Next, the operation of this embodiment will be described with reference to the flowchart of the control program shown in FIG. That is, in the initial state (equipment initial state) of the present apparatus, when the operation button 4 on the remote key 1 side 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, and 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, indicating that the vehicle is in the synchronized state. To do.

Therefore, for example, if the operation button 4 on the remote key 1 side is operated in the initial state, the operation switch 16 is turned on and the designated count value k of the count code p is set to "1" in the count code shift register 19. In response to this, in the key side memory 17, the count code storage unit 17a outputs the count code p having the count value k of "1" 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.

Then, the count code shift register 19 and the ID code shift register 20 output the code signal CD (1), which is a combination of the count code and the ID code C (1), to the modulation circuit 22 and convert the carrier wave into a radio wave signal. The data is converted and transmitted from the antenna 24 via the output circuit 23. As a result, when the antenna 7 on the vehicle body side receives this radio wave signal and the receiving circuit 25 performs a receiving operation based on this radio wave signal and gives its output signal to the power supply control circuit 26, this power supply control circuit 26 will control the power supply voltage. As a result, each circuit on the vehicle body side starts to operate.

That is, in the receiving device 6 on the vehicle body side, the reception code signal CD (k) (k = 1 in this case) input via the waveform shaping circuit 27 is input to the reception 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 and stored in the ID code shift register 32. On the other hand, the power supply control circuit 26
Based on the output of the control power supply voltage, the matching circuit 34, which mainly includes a microcomputer, starts the control program shown in FIG.

The matching circuit 34 first reads the received code signal CD (k) from the received code shift register 30 in step S1. At this time, the count code matching circuit 35 reads the received count code p from the count 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. Then, the matching circuit 34
When the process proceeds to step S2, the count code P of the count value K (K = 1 in this case) currently designated in the vehicle body side memory 37 is obtained.
Is read out to the counting code collating circuit 34.

In step S3, the collation circuit 34 determines the received count code p and the count value k and K of the read count code P.
And is compared to determine whether the reception count code p is smaller. Here, first, since it is assumed that the code signal CD is transmitted in a synchronized state from the regular remote key 1, 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 and K of the received count code p and the read count code P in step S4 are equal, the matching circuit 34 determines "YES" and proceeds to step S5. And I corresponding to the count code P
The D code C (K) is read from the vehicle body side memory 37, and in the next step S6, the reception ID code C already read.
It is checked whether (k) is equal to the ID code C (K) read from the vehicle body side memory 37 now.

Then, the matching circuit 34 confirms that the received ID is legitimate.
If the code C (k) has been read, the matching results should match. Therefore, it is determined to be "YES" in this step S6 and only step S7 is performed. Here, the ID code C ( It is determined whether k) is the ID code CN with the unique reset code RST added. Then, in this case, since the ID code C1 is still present, the matching circuit 34 determines "NO" and determines in step S8.
, The count value K of the count code P specified in the vehicle body side memory 37 is now collated, and the count value K of the count code P is incremented by “1” (in this case, K + 1 =
2), and in the subsequent step S9, a coincidence detection signal indicating that the collation results are coincident is output to the door lock control circuit 38 to end the program and return 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, the door lock control circuit 38 recognizes the coincidence detection signal as an unlock signal and causes the door lock device 12 to unlock when the door lock mechanism locks the door of the automobile. When the door lock mechanism unlocks the door, the coincidence detection signal is recognized as a lock signal and the door lock device 12 is caused to perform the lock operation.

Similarly, each time the operation switch 3 on the remote key 1 side is turned on, the transmitter circuit 5
The designated count value k of the count code p in the key side memory 17 is sequentially increased to “2”, “3”, ..., “K” ,.
The count code p is read so that it becomes "1", and the ID codes C2, C3, ..., C corresponding to each count code p are read.
, ..., CN-1 are sequentially read and added, and by these, code signals CD (2), CD (3), ..., CD (k),
, CD (N-1) are converted into radio signals and transmitted from the antenna 24.

Then, in the receiving device 6 on the vehicle body side,
When the received code signal CD (k) is received, the control program is started and steps S1 to S8 are executed in the same manner as described above, and the designated count value K of the count code P is sequentially set to "2" and "3" from the vehicle body side memory 37. , ..., "k", ..., "N-1"
, And CN-1 corresponding to the count codes P are sequentially read out and collated, whereby the remote key 1 and the receiver 6 are read. The collating operation is performed in a state in which the synchronous relationship between and is maintained.

Now, when the count value k of the count code p of the code signal transmitted from the remote key 1 becomes "N" during the collating operation as described above, the ID at this time is determined.
Since the code C (N) is the ID code CN to which the unique reset code RST is added, when the code signal is received, the matching circuit 34 operates as follows.

That is, when the collating circuit 34 starts the control program as described above, executes steps S1 to S6, and proceeds to step S7, it determines "YES" here. Then, 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", and in the subsequent step S11, the alarm is generated. An alarm control signal is output to the control circuit 39, and the process returns to step S9. Thereafter, the collation circuit 34 outputs a coincidence detection signal indicating that the collation results coincide with each other to the door lock control circuit 38 in the same manner as described above, ends the program, and returns to the main program.

Next, the operation button 4 on the side of the remote key 1 is inadvertently operated when the locking and unlocking operations are not performed, or is operated at a position distant from the receiving device 6 to receive the signal. When 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) becomes larger than the count value K of the count code P designated on the receiving device 6 side, the synchronization relationship is deviated. The matching operation in such a case will be described below.

In this case, the collation circuit 34 determines "NO" in step S4 in the above-mentioned control program, and proceeds to step S12. Here, the matching circuit 34 receives the count value K of the read count code P to the vehicle body side memory 37 and receives the count value p.
Then, the count value k is set 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 when it is determined to be "YES" in step S6, the program ends through steps S7 to S9.

As a result, even if the synchronization state is lost,
With the regular remote key 1, it is possible to drive the door lock device 12 by recognizing that it is a regular ID code by operating the operation button 4 only once, and to synchronize again. The state will be maintained.

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

This cancels the operation when a different code signal is received, returns to the state before the reception, and after that, when the code signal is transmitted from the regular remote key 1, the correct reception verification operation can be performed. It becomes.

On the other hand, when an attempt is made to drive the door lock device 12 by using a radio wave transmitting means other than the regular remote key 1, that is, for example, the radio signal transmitted from the remote key 1 is intercepted and its code signal is received. CD (k) is 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. Therefore, in the vehicle-side receiving device 6, 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 the control program associated with the reception of the radio wave signal, and proceeds to step S3 through steps S1 and S2.
It is determined as "ES", and the program ends as it is without performing the collating 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 matching circuit 34 as described above means that the code from the remote key 1 is transmitted, as will be described later. Since this is not possible in the collating circuit 34 which receives the signal in synchronization, the program is terminated without performing the collating operation because it receives the code signal received from another remote key or the like. 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 possible to transmit the code signal as a radio wave signal. However, in this case, the I
Since the value of the D code C (k) remains the same, the collation circuit 34 determines “NO” in step S3, and although the process can proceed to step S6 through steps S4 and S5, the ID code C ( Since the values of k) do not match, the determination is "NO" here, the program is terminated through step S13, and the match detection signal is not output.

In this remote key system, the door lock device 12 is operated by performing the above collating operation.
When the lock operation is performed, the receiving device 6 sets the warning mode for theft prevention when it detects that all the doors are closed based on the detection signal from the door courtesy switch 10.

Although a detailed description is omitted, in the setting state of the warning mode, when the door opening operation is detected by the door courtesy switch 10 in order to prevent unauthorized intrusion from the outside, an alarm signal is output. A notification operation is performed so as to abandon the illegal act by ringing a horn (not shown) or blinking a light.

Further, in this remote key system, it is judged whether the key inserted in the ignition key cylinder is the proper remote key 1 based on the code signal CD (k) transmitted from the transmission circuit 5. The determination is made between the IG key position switch 8 detecting the insertion of the key plate 2 of the remote key 1 and the IG key ACC switch 9 detecting the turning operation to the ACC position. If the code signal CD (k) is input, the engine is allowed to start.

As described above, in the present embodiment, the count signal p and the code signal CD (k) obtained by cyclically assigning and combining the count code p and a plurality of types of ID codes C1 to CN corresponding to the count code p are combined on the remote key 1 side. Stored in the key side memory 17,
A configuration in which the transmission circuit 5 sequentially transmits the code signal CD (k) as a radio signal according to the operation of the operation button 4,
The receiving device 6 side is provided with a vehicle side memory 37 for storing a code signal CD (K) having the same contents as the key side memory 17, and a collation circuit 34 performs a reception collation operation in synchronization with the reception count code p. When the count value k is larger than the count value K of the count code P set on the receiving device 6 side, the ID code C (k) corresponding to the received count code p is read and collated.

As a result, even if the operation button 4 of the remote key 1 is inadvertently operated, the regular remote key 1 can reliably output the coincidence detection signal by the receiving device 6 by one operation. The locked or unlocked operation can be performed and the code signal copied by the interception of the transmission signal can be reliably excluded and the security can be improved. It is possible.

In the above embodiment, the case where the count values k and K of the count codes p and P are set by incrementing by "1" has been described, but the present invention is not limited to this, and security is taken into consideration. For example, it is possible to set an increase number of "2" or more, and not only to increase the number, but also to gradually increase the number.

Further, in the above embodiment, the counting codes p, P
Although the case has been described where the count values k and K of “1” are started from “1”, the present invention is not limited to this.
It is also possible to allocate a part of ~ MN to the number of ID codes C (N), and set so as to start from the minimum value or the maximum value and return to the original value when the maximum value or the minimum value is reached. The codes p and P also have a more complicated number of configurations, and it is difficult to decipher which code signal CD the unique reset code RST is added to, and the security can be further improved.

Further, in the above-mentioned 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 switch may be separately provided.

In the above embodiment, the transmitter circuit 5 of the remote key 1 is provided with a battery exhaustion signal code for notifying the exhausted state of the battery 15 to the code signal when transmitting the code signal for the predetermined number of times, When the receiving device 6 receives this, the alarm device 13 may notify the user to prompt the user to replace the battery 15 of the remote key 1.

Further, although the door lock mechanism is provided as the vehicle load in the above embodiment, an engine starting device, a window opening / closing mechanism or the like may be provided instead.

In addition, the present invention is not limited to the above-mentioned embodiments, and for example, the airborne signal may be an ultrasonic signal or an infrared signal, and may be modified appropriately within the scope not departing from the gist. Of course, it can be carried out.

[0070]

The remote control device for a vehicle load according to the present invention comprises:
As described above, the remote key is provided with the key-side storage means, and the plurality of identification codes are sequentially assigned the corresponding number of count codes to be combined to form a code signal, which corresponds to the end of the count code. A plurality of code signals configured by adding a reset code to the code signal are stored, and the transmission means reads out the code signal from the key side storage means every time the operating means is operated and transmits it as an airborne signal. In addition, 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, and the reception count code included in the reception code signal is provided by the counting code collating means and the identification code collating means. And the current set count code set in the vehicle body storage means are compared, and when the count values of both match and the reception When the count value of the number code is ahead of the count value of the current 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 reception identification code and the identification code read out by the counting code collating means are collated, and when the two coincide, a coincidence detection signal is output and the set counting code of the counting code collating means is set to the reception counting code. The count value is advanced to the next count value and set, and when the two do not match, the count code matching means is configured to set the count code corresponding to the count value before reception, and the count code matching means When a reset count code is added to the reception identification code when setting the count code next to the count value of the reception count code as the set count code, And configured to set the count code constant to those having an initial count code among the plurality of code signals.

As a result, when the regular code signal is transmitted from the remote key, the count code gradually advances due to careless operation of the remote key, and the remote key side and the vehicle side are synchronized. Even if it is in a state where it can not be taken, it is possible to collate the identification code and output a coincidence signal by one receiving operation on the vehicle side, and if it is not a regular code signal, this Therefore, even if an airborne signal transmitted from a remote key is intercepted and the code signal is illegally copied to decode the count code and the identification code included in the code signal, Since the identification code is different by simply gradually advancing to the counting code of, the identification code collating means does not output the coincidence detection signal.
It has an excellent effect that the safety is very high.

[Brief description of drawings]

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

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

FIG. 3 is a block configuration diagram showing an outline of the overall 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 is a battery, 16 is an operation switch, 17 is a key side memory (key side storage means), 17a is a count code storage section, 17
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 receiving circuit, 26 is a power supply control circuit, 27 is a waveform shaping circuit, 28 is a battery, 29 is a received code detection synchronization circuit, 30 is a received code shift register, 31 is a count code shift register, 32 is an ID code shift register, 33 is a clock circuit, Reference numeral 34 is a collation circuit, 35 is a count code collation circuit (count code collation means), 36 is an ID code collation circuit (identification code collation means), 37 is a vehicle side memory (vehicle side storage means), 37a
Is a counting code storage unit, 37b is an ID code storage unit, 38
Is a door lock control circuit, and 39 is an alarm control circuit.

Claims (1)

[Claims] 1. An operating means provided on a remote key; and a plurality of identification codes, which are provided on the remote key, sequentially assigned a corresponding number of count codes to combine them to form a code signal and count the count. Key side storage means for storing a plurality of code signals formed by adding a reset code to the code signal corresponding to the end of the code, and the code signal is cyclically described each time the operation means is operated. Transmitting means for reading from the key side storage means and transmitting as an airborne signal, receiving means for receiving the airborne signal on the vehicle body, and a plurality of the same as the key side memory means provided on the vehicle body When the receiving signal from the receiving means is given, the vehicle body side storage means in which the code signal of 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,
Count code collating means for reading the identification code of the code signal corresponding to the count value of the reception count code from the vehicle body side storage means, and the reception identification code included in the signal received by the receiving means and the count code collating means. When the two match, the coincidence detection signal is output and the set count code of the count code comparison means is set to the count code next to the count value of the received count code. When there is no match, the identification code collating means for setting the counting code corresponding to the count value before reception to the counting code collating means, the identification code collating means, the counting code set by the counting code collating means. If a reset code is added to the reception identification code when setting the count code next to the count value of the reception count 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.