JPS60159260A - Radio wave type key system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This first invention wirelessly operates vehicle doors, trunks, glove boxes, house doors, etc. (hereinafter referred to as opening/closing bodies).
This invention relates to a radio key system for unlocking and locking.

(Background of the Invention) The present M Applicant u, previously specified rAllB57=13211
[Radio key system] was proposed in issue 8 (unpublished). This radio wave type key system is applied to the door lock of a vehicle as an opening/closing body, for example, and instead of the driver holding the key, the driver holds a transmitter/receiver, and the person in possession of the transmitter/receiver controls the switch installed on the door. The door lock is unlocked or locked only when the door is operated.

FIG. 1 is a block diagram showing a schematic configuration of the radio key system. In the figure, a transceiver 1 is housed in a card mold, and this cart-shaped transceiver 1
In this case, the driver carries jj instead of the mechanical key of vehicle A.

On the other hand, a control device 2 is mounted on the vehicle Δ side, a loop antenna 10 is provided on the door mirror, and a switch 12 is provided near the door handle of the driver's seat side door.

The card type transceiver 1 is always powered on and is in a state where it can receive a request signal transmitted from the control device 2 on the vehicle body side.

Then, when the driver carrying this card type transceiver 1 manually operates the switch 12 to unlock the door, as shown in FIG. It operates and transmits a request signal from the loop antenna 10 for a certain period of time. The request signal transmitted from the loop antenna 10 is received by the loop antenna 3 of the card type transceiver 1 by electromagnetic induction. Then, on the card type transceiver 1 side, the request signal detection circuit 7 detects that the above-mentioned Riffist signal is transmitted from the control device 2 on the vehicle A side, and activates the code signal generation circuit 8.

When the code signal generation circuit 8 is activated, it outputs a code signal unique to the vehicle A (a different code is set for each vehicle) that has been stored in the code storage circuit 9 in advance. Then, J''3 in the modulation circuit 5 modulates the carrier signal supplied from the Kitria oscillation circuit 6 with the code signal, and transmits it via the output circuit 4 and the loop antenna 3.

Then, on the vehicle side, the unique code signal transmitted from the card type transceiver 1 is transmitted to the loop antenna 10.
This received unique code signal is received by
The signal is supplied to the code matching circuit 14 via the receiving/demodulating circuit 13.

Code verification circuit 17! I determines whether or not the vehicle-specific code signal pre-registered in the code storage circuit 15 matches the received code signal, and only when both code signals match. It drives the actuator drive circuit 16.

Then, when the actuator drive circuit 16 is driven,
The actuator 17, which unlocks and locks the door lock, is driven to unlock the door.

In this way, the door locks are unlocked and locked only when the code signal on the card type transceiver 1 side matches the code signal registered in the control circuit 2 on the vehicle side. Even if a person who does not have the model transceiver 1 attempts to unlock the door, the door lock will not be unlocked.

Further, even if a person carrying a card-type transceiver 1 with a different code signal attempts to unlock the door, the door lock will not be unlocked in the same way. As a result, the card-type transceiver 1 has the same security performance as a conventional mechanical key.

In addition, the card-type transmitter/receiver m1 can be used while stored in a pocket or bag, which eliminates the need to take out the key every time the lock is unlocked or locked, unlike conventional mechanical keys. Become.

The actuator 17 is configured to reverse the door lock state every time the actuator 17 is driven, so that if the door lock is locked before driving, the actuator 17 performs an unlocking operation; If so, perform the locking operation.

By the way, as a result of further research, the inventors of the present application have improved the performance by improving the following points.
We concluded that it is possible to improve convenience.

That is, the above card type transceiver 1. Due to the need to maintain the long life of the built-in small battery, the vehicle body side control device 2
The configuration is such that a predetermined unique code signal is transmitted only when a request signal is transmitted from.

In the radio key system according to the earlier application, a carrier wave of a constant frequency is used as the request signal, so in a place where strong external noise around this frequency is generated, the card type transceiver 1 can There is a risk that external noise may be mistakenly recognized as the request signal. Therefore, while external noise is present, the unique code signal continues to be transmitted, and the small battery used as a power source for the card type transceiver 1 is rapidly consumed, requiring frequent battery replacement. must be done.

Further, the device of the prior application uses a request signal of the same frequency for all vehicles. Therefore, if the card-type transceiver of another vehicle is near the own vehicle, the card-type transceiver of the other vehicle will also transmit a unique code signal in response to the signal sent from the own vehicle to Rifnis 1. As a result, in the control device of the own vehicle, there is interference between the own vehicle's own vehicle's own mode signal and the other vehicle's fixed mode signal, causing a malfunction.

Therefore, if the request code is also encoded and used as a vehicle-specific signal, the device r't will be more convenient and have better performance.
The conclusion was that it was possible to provide the following.

(Object of the Invention) The object of the invention is to prevent malfunctions caused by receiving external noise and unique code signals of J3 and other vehicles, and to reduce battery consumption. Our goal is to provide the following.

(Structure of the Invention) Hereinafter, the (14) structure of the present invention will be described and explained using the block diagram of FIG.

The radio key system of the present invention includes a portable transmitter/receiver 100.
and an opening/closing body side control device 200.

When the encoded unique riffist signal 202 is received by the unique request signal receiving means 101, the unique request signal matching means 102 determines whether or not the received unique request signal 202 matches a preset unique request signal. If a match is determined, a unique signal 104 is transmitted from the unique signal transmitting means 103.

On the other hand, a unique request signal transmitting means 2O1 for transmitting the unique request signal 202 is provided on the opening/closing body side. After the transmission of the unique request signal 202 is completed, the unique signal receiving means 203 is activated. , the unique signal +'31 C) 4 is received, and the received unique signal is sent to the unique signal matching means 204 to determine whether it matches the unique signal set in advance on the opening/closing body side or not. It will be done.

Furthermore, only when the actuator driving means 205 determines that the unique signals match, the actuator 206, which locks and unlocks the door lock, etc., is driven only when the unique signals match. It is configured to do so.

(Description of Embodiment) FIG. 4 is a block diagram showing the electrical configuration of an embodiment of the radio wave type key system according to the present invention.

d5, the explanation of the same parts as those in the 8th prior application will be omitted.

This example device shows a case where it is applied to a vehicle door lock, like the device of the prior application, and the card type transceiver 1
8 and a control device 19 provided on the vehicle body side.

In the card-type transceiver 18, a request code signal receiving and demodulating circuit 21 extracts a vehicle-specific request code transmitted from the vehicle-side control device 19 and received by the loop antenna 20.

The microcomputer 22 inputs the received request code (hereinafter referred to as the vehicle body request code) and inputs the request code registered in advance in the code storage circuit 23 (hereinafter referred to as the card side request code). ) and the extracted vehicle body-side riffist code.

The code storage circuit 23 stores in advance the request code and a key code (hereinafter referred to as a card-side key code) corresponding to a unique code in the device of the prior application.

The key code signal generation circuit 24 outputs the card-side key code stored in the code storage circuit 23 as a serial pulse train signal in response to an activation signal from the microcomputer 22.

Then, in the modulation circuit 26, the carrier supplied from the carrier oscillation circuit 27 (Jζ) is modulated into the card-side key code signal, and after being amplified by the key code signal output circuit 25, it is wirelessly transmitted from the loop antenna 20. It is the composition.

On the other hand, in one vehicle body side control circuit, the key code signal receiving and demodulating circuit 34 receives the Iζ card side key code signal transmitted from the card type transceiver 18, removes the carrier component, and extracts the card side key code. The extracted card-side key code is supplied to the microcomputer 35.

The microcomputer 35 is activated by the operation of the switch 33, reads a vehicle-specific request code registered in advance in the code storage circuit 36, supplies it to the request code signal generation circuit 32, and processes the received request code. Enter the card-side key code] and check whether the vehicle-specific key code (hereinafter referred to as the vehicle-side key code) registered in advance in the code storage circuit 36 matches the extracted key code. This is to make a determination.

The modulation circuit 30 modulates the kitria output from the carrier oscillation circuit 31 with the vehicle body side request code signal and outputs it to the request code signal horn circuit 29. And this request code signal on the vehicle body side is
After being amplified by the request code signal output circuit 2, it is transmitted via the loop antenna 28.

The actuator drive circuit 37 drives the actuator 38 in response to commands from the microcomputer 35. .

The actuator 38 includes a driver's door lock actuator for locking and unlocking the driver's side door, a passenger door lock actuator for locking and unlocking the passenger's side door, and a vehicle body door lock actuator for locking and unlocking the passenger's side door. Trunk lock actuator for locking and unlocking rear doors.

A glove box actuator for locking and unlocking the glove box, a steering lock actuator for locking the steering wheel, a power window actuator for opening and closing the windows, and the like are provided.

Here, the contents of the codes registered in the code storage circuit 23 and code storage circuit 36 will be explained using FIG. 5.

This registration code is, for example, 2/l bit "o"
.

414 codes are formed by the combination of II, II, and a different code is set for each vehicle. The upper 8 bits are a request code, and the lower 16 bits are a key code.

For example, 10110001 is registered in advance as a request code in the load storage circuits 23 and 36 of both, and 111010001010110 as a key code.
1 is registered.

Then, by not reading the upper 8 bits of the registered registration code, the vehicle body request code signal transmitted from the vehicle body side control device 19 is transmitted from the request code signal generation circuit 32 to FIG. It is formed by outputting a serial pulse train (No. 8) and modulating the carrier as shown, and is transmitted by adding marker signals M+, d3 and start signal S1.

In addition, the card side key code signal is the lower 16 of the registration code.
By not reading the bit, the code signal generation circuit 24 outputs the serial pulse train signal 1 (not shown in FIG. Figure (D)). In addition, when the card-type transceiver 18 verifies the received vehicle-side request code, the code storage circuit 23
The upper eight bits of the registration code are read from.

Similarly, when verifying the card-side key code received by the vehicle-side control device, the lower 16 bits of the registration code are read from the code storage circuit 36.

In addition, in this embodiment, the code for the transmission request signal is 8.
bit, response code signal code of 16 bits total 2/
Although it is assumed to be 1 bit, it is not limited to this.

Next, FIG. 6 (A) is a flowchart showing the processing contents executed by the microcomputer 35 in the vehicle body side control circuit 19, and FIG. Now, the flowchart 1 shows the processing contents to be executed in the microcontroller 22.

Now, assuming that all the doors of the vehicle are locked, unlock the driver's side door for the driver carrying the car 1-type transmitter/receiver 18 to enter the vehicle. An example of the operation when you try to move will be explained below. At this time, the driver only has to manually operate the switch 33 provided near the door handle of the driver's seat side door.

In FIG. 6 (△), when the switch 33 is turned ON, the 'rl-specific result in step 301 becomes YES, and the next process in step 302 is executed.
After the vehicle body request code registered in advance in the ML storage circuit 36 is read into the microcomputer 35,
The signal is supplied to the request code signal generation circuit 32.

Next, the process of step 303 is executed, and the modulation circuit 3
0, the carrier supplied from the carrier oscillation circuit 31 is modulated by the request code signal supplied from the request code signal generation circuit 32 and output to the request code signal output circuit 29. Then, this vehicle body side request code signal No. 2 is amplified via the request code signal output circuit 29 and then sent to the loop antenna 28.
Sent from.

On the other hand, when the vehicle body side request code signal is transmitted, the vehicle body side request code signal is received by the loop antenna 20 in the card type transceiver 18 .

Accordingly, the determination result at step 310 in FIG. 6(B) becomes YES, and the process at the next step 311 is executed. In the process of step 311, the vehicle body side request code signal is read and temporarily stored in a predetermined register.

In the next step 312, the code storage circuit 2
The card-side request code registered in advance in 3 is read.

Then, in the process of step 313, a process of determining whether the received IJ vehicle body request code matches the card side request code is executed using a predetermined logic sieve.

In the next step 314, if the result of the matching determination process is YES, the next step 315 is ll! The X operation is executed and the card side key code is read. Further, if the determination result in step 314 is No,
The process returns to the request code signal reception standby state again.

When the card-side key code is read, the process of step 316 is executed, and the card-side key code signal is wirelessly transmitted from the loop antenna 20.

On the other hand, the vehicle side sub-911 circuit 19 receives the card-side key code signal via the loop antenna 28 , demodulates it in the key code signal reception and demodulation circuit 34 , and then supplies it to the microcomputer 35 .

As a result, the determination result in step 304 is YES.
Then, in the next step 305, the received card-side key code is read.

Next, the process in step 306 is executed to read the vehicle body key code stored in the code storage circuit 36, and in the process in step 307, the received card side key code and the vehicle body key code are Match determination processing is executed.

In the process of step 308, the above determination result is YES.
If so, the next step 309 is executed, and the microcomputer 35 outputs an actuator drive command signal. On the other hand, if the above determination result is No, no actuator drive command signal is output.

Then, in response to the actuator drive command output, a drive signal is output from the actuator drive circuit 37 to the actuator 38 (here, the driver's side door lock actuator), and the driver's side door lock is unlocked. .

Although this embodiment shows an example in which the present invention is applied to a vehicle door lock, it goes without saying that the present invention can also be applied to locking and unlocking general locks, for example.

(Effects of the Invention) As explained in detail below, the radio key system according to the present invention prevents the J3 in the card type transmitter/receiver from misrecognizing foreign noise as a request signal. Even if there is external noise, the key load signal will not be transmitted due to this noise (and battery consumption can be reliably reduced).

In addition, the request coding q is a unique code for each set of card type transmission/reception (number and opening/closing body side), and it is possible to confuse the riffist coat signal with another card type in the transceiver and transmit the key coat signal. Since there is no signal, it is possible to prevent battery wastage as well as to prevent malfunctions due to interference.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the electrical configuration of the radio key system according to the prior application, FIG. 2 is a diagram showing the appearance of the device and how it is mounted on a vehicle, and FIG. 3 is a block diagram showing the configuration of the present invention. 4 is a block diagram showing the electrical configuration of a device according to an embodiment of the present invention, FIG. 5 is a diagram showing a request code signal, a key code signal, and their transmission waveforms, and FIG. 6 is a block diagram showing the electrical configuration of a device according to an embodiment of the present invention. This is a flowchart showing the contents of the processing executed in the following. 100.18... Portable transceiver 101... Unique request signal receiving means 102...
Unique request signal matching means 103... Unique signal transmitting means 1071... Unique code signal 200... Opening/closing body side control device 201... Unique request signal transmitting means 202...
Unique request signal 203... Unique (i number receiving means 204... Unique signal matching means 205... Actuator drive means 206... Actuator 19... Vehicle body side control device 21... Request code signal reception demodulation Circuit 22.3
5...Microcomputer 23.36...Code storage circuit 32...Request code signal generation circuit Patent applicant] Sanjiri Co., Ltd.

Claims (1)

[Scope of Claims] 1) A riffist signal receiving means for receiving a coded unique riffist signal; A portable transceiver comprising a unique request signal matching means for determining whether or not the unique request signal matches, and a unique signal transmitting means for transmitting a predetermined unique signal when it is determined that the unique riffist signal matches. a unique riffist signal transmitting means installed on the opening/closing body side and transmitting the unique riffist signal; and a unique signal receiving means installed on the opening/closing body side receiving the unique signal; j signal matches a unique signal set in advance on the opening/closing body side or a unique signal matching means for determining whether it is a cup; and an actuator for driving a load of a predetermined part on the opening/closing body side such as a Ni door lock; It is determined that the unique signals match. A radio wave type key system characterized in that it comprises an actuator driving means for driving the actuator, depending on the case.