JPS61122379A - Door lock controller - 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] <Technical Field of the Invention> This invention transmits a signal from a transmitter provided independently of a vehicle, causes a receiver in the vehicle to receive the signal, and transmits a signal from the transmitter. The present invention relates to a door lock control device that locks and unlocks the doors of a vehicle if the signal is correct.

Prior art and its problems〉 The transmitter sends a code signal to lock the vehicle door.
Conventionally, the door lock control device that unlocks the vehicle uses a method that transmits a predetermined code from the transmitting side, so someone other than the vehicle owner can use another transmitter to repeatedly transmit different codes by changing the code little by little. If transmitted, one of these codes will match the correct code and the vehicle door will be unlocked. Additionally, there is a possibility that someone other than the vehicle owner could use a receiver to receive the code from the transmitter, decipher it, output a pseudo code from another transmitter, and then open the vehicle door. Ta.

<Object of the invention>'co-iq+yo□6cy>x$94:tjtb
, □. Even if a third party receives the signal output from the transmitter, it can be prevented from easily deciphering the signal, thereby prohibiting anyone other than the owner of the vehicle from locking or unlocking the door. To provide a door lock control device capable of achieving stronger prevention of fraud by stopping a receiver on the vehicle side from receiving when a fraudulent code is sent to a vehicle.

<Configuration and Effects of the Invention> FIG. 1 is a functional block diagram showing the configuration of the present invention, which is a door lock control device according to the present invention.

A door that transmits data from a transmitting unit 2 provided separately from the vehicle, causes the receiving unit 1 provided in the vehicle to decode the data, and controls locking and unlocking of the door 31 based on the decoding result. A lock control device, wherein the transmission side unit 2 is a lock control device.

(b) A sample period data generation means 50 that generates sample period data that becomes a “1” signal and a “0# signal” at the start of data transmission; , a variable generating means 51 that performs calculations based on this arithmetic expression code and obtains answer data; (c) converting the output of the sample period data generating means and the output of the variable generating means sequentially into transmission signals; and a transmitting means 52 for outputting the received unit l.
1) a signal length detecting means 53 for separating the sample period data from the output of the transmitting means 52 to obtain the lengths of the '1' signal and 'O' signal and storing these lengths; ) The output of the transmitting means 52 is decoded based on the output of the signal length detecting means 53, and an operation is performed based on the arithmetic expression code to obtain answer data, and this answer data is the value indicated by the answer data. The determining means 54 that determines whether or not they match is used to control locking and unlocking of the door 31, and if they do not match, the discrepancy counter is incremented, and if data that differs from correct data has been received more than a predetermined number of times. The apparatus further includes a control means 55 for inhibiting the operation of the receiving side when the discriminating means 54 detects a mismatch for the number of times or more.

With such a configuration, in the door lock control device according to the present invention, the transmitting unit 2 first receives the "1" signal and the "1" signal.
The receiving unit 1 outputs a “0” signal and uses the lengths of these 1” and ’”O” signals as bit discrimination standards, and then the transmitting unit 2 selects one of the multiple arithmetic expression codes. An arithmetic expression code is selected, the arithmetic result based on this arithmetic expression code is sent to the receiving unit 1, and the receiving unit 1 of 0 determines whether or not the arithmetic result is correct. Only lock door 31,
It's unlocked. As a result, the present invention can achieve the following effects.

(b) Since the arithmetic expression code output from the sending unit and the corresponding answer data are included each time it is transmitted, even if someone who does not know the arithmetic expression corresponding to each code tries to decipher it, it is easy to decipher it. This prevents anyone other than the owner from unlocking the vehicle door.

(b) Since the receiving unit of the vehicle prohibits unlocking the door if the wrong code is entered a certain number of times, stronger prevention of unauthorized unlocking can be achieved.

(c) Even if the length of the "1"1" length 8 y 0" signal transmitted by the transmitting unit changes due to aging, etc., the receiving unit's 61
Since the "signal,"'0, and "0" reference lengths are newly set each time, the stability and reliability of the operation can be improved.

<Description of Embodiment> FIG. 2 is a block diagram showing an embodiment of the door lock control device according to the present invention. The door lock control device shown in this figure has a receiving unit 1 provided on the vehicle side and a transmitting unit 1 provided independently of the vehicle. 7a0. The cutter 2 is provided with a power source, a group of setting switches 4, a power switch 5, a transistor 6 for holding power, a transmission control section 7, and a light projecting section 8.

The power source 3 is composed of a portable battery, a dry battery, etc., and the power obtained from the power source 3 is transmitted to the power terminal 7a of the transmission control section 7, the emitter of the transistor 6, one end of the power switch 5, and the setting switch group. 4 is supplied to one end of each of the setting switches 9-1 to 9-n.

The power switch 5 is a push button switch that is pressed by the operator, and when the power switch 5 is pressed, the voltage applied to one end is output from the other end and is applied to the power switch terminal 7C of the transmission control section 7. supplied to

The transistor 6 is turned on when the transmission control section 7 outputs a power hold signal from the holding terminal 7b, and if this transistor 6 is turned on, the transmission control section 7 is turned on even when the power switch 5 is not pressed. Voltage is supplied to the power switch terminal 7C.

The setting switch group 4 has some of the setting switches 9-1 to 9-n closed in advance, and contains n-bit setting data set by opening and closing each of the switches 9-1 to 9-n. is supplied to the transmission control unit 7. The transmission control unit 7 includes a CPU (microprocessor) 10, a OM (read only memory) 11, a BλM (random access memory) 12, a ring counter 13 of 164,
It is composed of an output port 14 and the like, and operates as shown below.

First, when the % power switch 5 is pressed, the process proceeds to step STI, as shown in the flowchart of FIG.

At 8T2, the CPU I O turns on the transistor 6 so that even if the power switch 5 is turned off, voltage is supplied to the power switch terminal 7C, and this state is maintained until the transmission is completed. Next, the CPU 10 reads out the setting data DO set in the setting switch group 4 in step 8T3, stores it, and causes the output port 14 to send out a start signal S1 having a width Ts in step ST4. The light projecting unit 8 is equipped with a light emitting diode, etc.
If turned on by Ul0 and turned off after time Ts, then
An optical signal 15 corresponding to a start signal 81 as shown in FIG. 4(a) is sent out. Next, the CPU 10 performs step 8.
S2. Optical signals 15 corresponding to the "θ" signal S3 are sequentially output.

In this case, these '''1''1''2.'O'' signals S
3, the widths Wl and WO are measured and stored on the receiving side, and each of these widths Wl is measured on the receiving side.

Based on WO, it is determined whether the subsequent received signal is ``1'' or 0''.

Next, the CPU 10 converts the parallel setting data DO stored in step 8T3 into serial setting data DO, and outputs it from the light projection unit 8 in step 8T7. After this,
CPU10 performs step 8T8.

The internal ring counter 13 is incremented until the power switch 5 is turned off at 8T9, and the table 16 shown in the count data D1 when the switch 5 is turned off is referred to, and the arithmetic expression code D2 corresponding to the count data D1 is calculated. , calculate the calculation numerical data D3, and calculate the sixth
While referring to the table 17 in the ROMII shown in the figure, the setting data DO, the arithmetic expression code D2. Answer data D4 is obtained from the calculated numerical value D3. Here, the setting data DO
is "00001" and the count data D1 is ``9'', then the calculation formula code D2 corresponding to the count data 19'' in table 16 is ``0'' and the calculation value D3 is 1.
”, and the arithmetic expression code “O” in Table 17 is “
+”, so the answer data D4 is '00001''
"+"'1", that is, 00001 + 1 = 000
It becomes 02. Next, in step 5TII, the CPU 10 causes the light projecting section 8 to output the start signal S1 again as shown in FIG. Calculated numerical value D3. Sequentially output the answer data D4 people 6.Next.CPU”
0 turns off the transistor 6 at the end 7ST14 and stops the transmission operation.

When the power switch 5 of the transmitting unit 2 is pressed in this way, the transmitting control section 7 outputs the first start signal S1, 1'' signal,
"0" signal, setting data DO 12th start signal 8
1. Arithmetic expression code D2. Calculated numerical value D3 @Next light emitter 8
Here, it is converted into an optical signal 15 and output. In addition, in step 5TIO mentioned above, if division is selected and a fraction is obtained by executing this division, round down the fraction,
Alternatively, processing such as rounding up is performed, and the digit of the integer part of the division result is treated as answer data D4.

Next, the receiving unit 1 will be explained. The receiving unit 1 shown in FIG. 2 includes a light receiving section 18 including a photodiode, a power source 19, a setting switch group 20. It is composed of an ignition key switch 21, a reception control section 22, a lock solenoid 23, and an unlock solenoid 24. The optical signal 15 sent by the transmission side unit 2 is converted into an electric signal by the light reception section 18, and is then received. 〇 Reception control unit 2 supplied to the reception terminal 22a of the control unit 22
2 consists of a CPU 25, a RAM 27, a ROM 26, a discrepancy counter 28, an input port 29, an input/output port 30, etc., and when the ignition key switch 21 is in the ignition position, the ignition key switch 21 is connected to the IIE source switch terminal 22b through the ignition key switch 21. A voltage is applied, and each part of the circuit is operated by taking in the voltage applied to the power supply terminal 22C using this voltage, and operates as shown below.

First, stop driving and turn the ignition key switch 21
t6 to the ignition position, the CPU 25 turns on the same CPU at steps 8T19 and 8T20 as shown in FIG.
The receiving system flag in U25 is set to F'G='''ON to enable reception, and at step 5T21, the discrepancy power 1 counter 28 is set to "O". Next, in steps 5T22.8T23, the CPU 25 reads the value of the setting switch group 20 set to the same value as the setting switch detail 4 of the sending unit 2, and stores this as DQa.

In this state, if the person holding the transmitting unit 2, such as the driver, gets out of the car and presses the power switch 5 of the transmitting unit 2, the light receiving unit 18 of the receiving unit +-i will transmit light from the light emitter 8. The resulting optical signal 15 is received. As a result, C
PU25 is step f! 3T24 determines whether the value of the reception prohibition flag is '1'' or *On, and in this case, the FG
=“IO”, so the process advances to step 8T25. After that, when the light receiving section 18 of the receiving unit 1 completes the reception of the optical signal 15 corresponding to the start signal S1 from the transmitting unit 2, the CPU 25 sequentially executes steps 8T26 and 8T27, and '''l sent
Measure the widths Wl and WO of the "signal, 'O" signal and find these widths Wl.

Memorize WO. Then, the CPU 25 calculates these widths Wl,
Setting data Do, second start signal S1, arithmetic expression code D2, and arithmetic numerical value D3 that are subsequently supplied based on WO
, determines whether each bit of the answer data D4 is 1m or v'0''.By doing this, even if the excavation frequency in the transmitting unit 2 changes due to aging etc.
The received data can be reliably identified by the receiving unit 1, and the reliability of data transmission can be improved.

Next, the CPU 25 receives the setting data Do sent by the sending unit 2 in step 8T28, and in step 8T2
At step 9, this setting data DO is compared with the setting data DQa obtained at step ST22, and if they match, the process proceeds to step 8T30, where it enters a standby state. Then, when the transmitting unit 2 sends out the optical signal 15 again, the CPU 25 receives the second start signal S1 in step ST31, and sequentially receives the arithmetic expression code D2 and the arithmetic value D3 in the next step 8T32. ROM2
6, that is, a table configured in the same manner as the table 17, set data DOa.
, answer data D from calculation formula code D2 and calculation value D3
4a and store it. Next, in step 8T33, the CPU 25 receives the answer data D from the sending unit 2.
4 received, 4 sf '77' 8 T 34
T2 (Q answer data D4. Determine whether D4a matches or not, and if they match, step 8T35
It is determined whether the door 31 is locked or not. Here, if the door 31 is opened and the door switch 32 is closed, the CPU 25 outputs an unlock signal in step 8T36 to turn on the unlock solenoid 24 and release the door lock. If the door 31 is not locked, the CPU 25 outputs a lock signal in step ST37 to turn on the lock solenoid 23 and lock the door 31.

Further, if a mismatch between the setting data DO and DOa or a mismatch between the answer data D4 and D4a is detected in steps 5T29 and 8T34 described above, the CPU 25 performs step 8T38.
Step 8T39 increments the mismatch counter 28 by "+1", and increments the mismatch counter 28 by "+1".
It is checked whether the integrated value of 8 is a predetermined value, for example, 15 or more. Then, when this integrated value exceeds the above value, that is, when the incorrect optical signal 15 is supplied from the transmitting unit 2 15 times or more, step ST40 is executed to set the reception prohibition flag to ``1'', and from then on, Prohibit reception processing. This makes it possible to prevent a person other than the vehicle owner from illegally unlocking the vehicle's door lock even if the light signal is repeatedly supplied to the light receiving section 18 while changing the bit little by little. In the embodiment, the counters 13 and 28 are provided on the transmitting side and the receiving side, but a part of the RAM 12゜27 may be used as a counter. From the arithmetic expression code D2. Although the calculation value D3 is output, a table similar to the table 16 is provided in the ROM 26, and the count data D1 is output from the transmitting unit 2.
The receiving unit 1 may convert the count data D1 into the arithmetic expression code D2 and the arithmetic numerical value D3 while referring to the table in the ROM 26.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing the configuration of the present invention, FIG. 2 is a block diagram showing an example of a door lock control device according to the present invention, and FIG. 3 is shown in FIG. Flowchart diagram illustrating an example of the operation of the transmitting side unit, No. 4
Figures (A) and (B) each show an example of the waveform of an optical signal sent from the transmitter unit shown in Figure 2, and Figures 5 and 6 each show a table in the ROM in Figure 2. diagram showing,
FIG. 7 is a flowchart showing an example of the operation of the receiving unit shown in FIG. 2. 1... Receiving side unit, 2... Sending side unit, 3
DESCRIPTION OF SYMBOLS 1... Door, 50... Sample cycle data generation means, 51... Variable generation means, 52... Transmission means, 53
... Signal length detection means, 54 ... Discrimination means, 55.
...control means.

Claims (1)

[Claims] Data is transmitted from a transmitting unit provided separately from the vehicle, the data is decoded by a receiving unit provided in the vehicle, and the doors are locked or unlocked based on the decoding result. A door lock control device for controlling a door lock, wherein the transmission side unit includes (a) sample period data generating means for generating sample period data that becomes a "1" signal and a "0" signal at the start of data transmission, and (b) (c) variable generation means for selecting a plurality of arithmetic expression codes according to the transmission state and performing arithmetic operations based on the arithmetic expression codes to obtain answer data; (c) output of the sample cycle data generation means; and transmitting means for sequentially converting the output of the generating means into a transmitting signal and outputting the transmitted signal, and (d) the receiving unit separates sample period data from the output of the transmitting means and generates a "1" signal and a "0" signal. ``Signal length detecting means for determining the length of the signal and storing this length; (e) decoding the output of the transmitting means based on the output of the signal length detecting means and based on the arithmetic expression code; (f) when a match is detected by the determining means; Controls locking and unlocking of the door, increments a mismatch counter if they do not match, and receives data when correct data and different data are received a predetermined number of times or more and the discrimination means detects mismatch for the predetermined number of times or more. A door lock control device comprising: a control means for prohibiting side operation.