JPS5852073B2 - Control method for electromagnetic door lock on vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for controlling an electromagnetic door lock on a vehicle, and particularly to a control method for an electromagnetic door lock that locks the vehicle door while the vehicle is stopped, parked, or running, and unlocks it when boarding or exiting the vehicle. Regarding the method.

For example, a passenger car is equipped with a lock/unlock lock on the driver's door, a lock solenoid button and an unlock solenoid in the door lock mechanism, and the door can be locked by operating the lock/unlock switch. ,
There is also a door lock control method in which a vehicle speed detection circuit is provided on the vehicle as needed, and a locking solenoid is energized when the vehicle speed exceeds a predetermined value.

In these systems, the driver locks all doors when leaving the vehicle, and unlocks the doors by inserting the key into the keyhole when entering the vehicle.
The door can be opened with a relatively simple duplicate key, and items inside the vehicle or the vehicle itself may be stolen.

SUMMARY OF THE INVENTION An object of the present invention is to provide a door lock control method in which a door cannot be unlocked unless a specific encryption key is operated using a portable keyword transmitting device assigned to the door.

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1a shows the external appearance of the keyword transmitting device used in the present invention.

On the front panel of the keyword transmitting device 10, a power-on switch operation button 11 and a keyboard 12 are installed.The keyboard 12 has 16 key switch buttons (0 to 9 degrees A-F) for entering codes. is installed.

As shown in FIG. 1b, two transmitting coil plates 131 and 132 are housed inside the keyword transmitting device 10, and these are made of flexible printed circuit boards.
It is attached to the case bottom plate.

The coil plate 13□ has figures 1c (front) and 1d.
As shown in the figure (back side), coils 131a and 131b are formed with printed electrodes on the front and back sides.

The transmitting coil plate 132 also has a similar structure to the transmitting coil plate 131.

These transmitting coil plates 131 and 132 are connected to the printed circuit board 14.

The printed circuit board 14 includes a set of key contacts, a power supply circuit, a code generator, and a transmitter.

Their configuration is shown in Figure 1e.

The power supply circuit is not shown in Figure 1e.

In FIG. 1e, the code generator 15 is a keyboard encoder 15a connected to the key contacts.

The 8-pit shift register 15b1 is composed of a low frequency clock pulse oscillator 15c and a mono multivibrator 15d.

When a certain key contact is closed, the keyboard encoder 15a generates a 4-bit code indicating this, and applies it to the 4 terminals of the 8-pit parallel input end of the shift register 15b.
And triggers the mono multivibrator 15d.

The mono multivibrator 15d produces a low level "0" output for a predetermined time 'r, 1 after being triggered, and during this period, the 8-bit input signal is stored in the shift register 15b.

When the output of the mono-multivibrator 15d returns to the high level "1", 8 pits are serially output to the serial output terminal of the shift register 15b at the period of the output pulse of the clock pulse oscillator 15c.

The output is "roxxxxxllll...", where the 4-bit "x" is a code representing the operated key.

The output of the shift register 15b amplitude modulates the output carrier wave of the carrier oscillator 16b in the analogue 16a of the oscillator 16.

The modulated wave is amplified to the transmission level by the amplifier 16c and applied to the coils of the transmitting coil plates 131 and 13□.

As a result, the transmitting coil plate 13. ．． An alternating magnetic field is generated on and off in the vertical direction of 13□ according to the transmission code.

Next, signal processing in a vehicle will be explained.

As shown in FIG. 2a, a receiving coil device 18 is bonded to the inner surface of the front window 17 of the vehicle.

An enlarged sectional view of this receiving coil device 18 is shown in FIG. 2b.

The main part of the receiving coil device 18 is a ferrite core 18a>
and the coil 18b wound thereon.
is connected to receiver 19.

Now, the keyword transmitting device 10 shown in FIG. 1a button and FIG. When the position is positioned and the key is operated, the transmitting coil plate 13. ．． A change in the magnetic field of 13□ is detected by the coil 18b of the receiving coil device 18,
The signal is amplified by an amplifier 19a of the receiver 19, and a 4KHz signal is extracted by a filter 19b.

As a result, a signal similar to the output of the oscillator 16 is obtained at the output end of the filter 19b.

The output of the filter 19b is amplified by an amplifier 19c, demodulated by a demodulator 19d into a form similar to the output of the shift register 15b, and applied to an AND gate 19e.

On the other hand, the output of the demodulator 19d is amplified and then applied to the comparator 19f, where it is compared with a predetermined level voltage Vref.

When the level is above a predetermined level, the output of the scolder 19f becomes a high level "1", and when it is below a predetermined level, the output becomes "O".
When this is "1", if the output of the demodulator 19d is a high level "1", the inverted output of the Antogame N9e is "0".
Thus, the demodulated code is applied to the cipher discrimination circuit 20.

The code discrimination circuit 20 on the vehicle includes non-volatile registers R11 to R14 such as battery pack-up non-volatile read/write semiconductor memory (hereinafter referred to as non-volatile RAM) for lock word (combination of four codes) memory, and unlock word. (Combination of 4 codes) Non-volatile register R for memory
21 to R24.

A lock word (for example, A I 23) is written into the registers R11 to R14 by using the write switches.

This writing is performed by closing the first switch 211 of the switch 21 for setting the lock word, and applying the write 1 designation signal to the registers R11 to R14 through the lock word A3. The number switches 216 and 21□ sequentially specify each of the registers R11 to R14('), and the second to fifth switches 21□ to 2.1. specify each of the codes (for example, A, 1. 2. Write a code indicating 3 etc. 0 In such a write, each of registers R11 to R14 is specified by the closed state of switches 126 and 217' by decoding the closed state of switches 126 and 217' with decoder DE1. Writing is designated by applying a write designation signal to one register to be written.

Writing of the code word for unlock designation, that is, the unlock word (for example, '321) is also performed using the switch 22 and the decoder DE2.

For convenience, registers R11 to R14 each contain 3,
2. The door locking and unlocking operations will be explained assuming that a code representing a trigram and A is stored in memory, and a code representing 1°2.3 and F is stored in registers R21 to R24, respectively. do.

When a code representing A arrives from the receiver 19, 1 is written in the serial-in, parallel-out shift register SH of the discrimination circuit 20.

This writing is performed using the oscillator O81, the NOR gate NR, the flip-flop F3, the AND gate A8, the monomultivibrator M1, the frequency divider FD1, the binary counter CO3, and the analog gate A7.

1. In the standby state, flip-flop F3 is reset and doubled, and its Q output is "moon", and the receiver 1
When the output of 9 becomes "0", the output of NOR gate NRI becomes "
At the rising edge of the signal ``1'', the flip-flop F3 is set, and the output of the oscillator O8 is outputted from the AND gate A8 and applied to the frequency divider FDI.

As a result, the frequency divider FDI outputs a 100Hz pulse, which is applied to the shift register SH, which generates 7 pulses (100Hz).
z), the output of counter CO3 becomes rl 1
The output of A7 becomes "1" and the flip-flop F3 is reset.

In this way, after the receiver 19 produces an output, 7 pits of data are stored in the shift register SH.

The 4 bits indicating the code in the 7-bit data are applied to all latches L11-L14 and L21-L24, but the differentiating circuit D4 detects the rising edge when the flip-flop F3 is reset, and A width pulse is generated which is applied to latches L14°L24, thereby storing a code indicating A in latches L14 and L24.

Since the memory of register R14 is A and the memory of register R24 is F, comparator C14 produces an output of "1" and comparator C24 produces an output of "11" which is "0".

When the output of the comparator C14 becomes "1", the flip-flop F2 is set, thereby
The output pulse of the differentiating circuit D4 is applied to the count pulse input terminal of the counter CO1 through the analogue AI.

As a result, the count value of the counter CO1 becomes "1", the output terminal 1 of the decoder DE3 becomes "1", and "1" is added to one input terminal of the AND gate A6.

Next, when a code indicating 1 arrives at the receiver 19, a latch signal "1" is applied to the latch L13 through the controller A6.

As a result, a code indicating 1 is stored in latch L13, the output of comparator C13 becomes "1", and counter CO1
The count value becomes 2, the output terminal 2 of the decoder DE3 becomes "1", and "1" is applied to one input terminal of the AND gate A5.

Next, when a code indicating 2 arrives, a latch signal "1" is applied to the latch L12 through the controller A5, and as a result, the code indicating 2 is stored in the latch L12, and the output of the comparator C12 becomes "1". The count value of counter CO1 becomes 3, and the output terminal 3 of decoder DE3 becomes "1".
”, and “1” is applied to one input terminal of AND gate A4.

Next, when the code indicating 3 arrives, the latch signal ``1'' is applied to the latch L11 through the controller A4.As a result, the code indicating 3 is stored in the latch Lll, and the output of the Bb comparator C11 becomes ``1''. At the same time, the output of A2 becomes "1" and the mono multipipe rake 231 is triggered, a reset signal is applied to the flip-flop F2, the flip-flop F2 is reset, and the reset signal is sent through OR2. is given to the differentiating circuit D5, and from the differentiating circuit D5 or game)C
A reset signal is applied to the latches L11 to L14 through the latches L11 to L14.

Mono multi-viprator 23. produces a high level "1" output for a predetermined time after being triggered, which energizes relay driver 241 to energize locking relay 271 (Figure 2c) for that time.

As a result, the locking solenoids (4 pieces) are energized, and all the doors (4 pieces) are locked.

In addition, in the case of a lock, after the code indicating A arrives, the code is sequentially stored in latches L14 to L11, and if the code differs from the codes other than A and 1 to 3 on the way, the game will fail.) The output of the Noah gate connected to A4 is “
1'', the flip-flop F2 is reset, the latches L11 to L14 are reset, and the mono multivibrator 23. is not triggered.

When the unlock word is input, the latch Lll
latches L21 to L24 corresponding to each of ~L14,
Differential circuit D2 and AND gate A corresponding to differentiating circuit D1
1, a counter CO2 corresponding to the counter CO1, a decoder DE4 corresponding to the decoder DE3, comparators C21 to C24 corresponding to each of the comparators C21 to C24, a flip-flop Fl corresponding to the flip-flop F2, The ORI corresponding to the OR gate OR2, the differentiating circuit D3 corresponding to the differentiating circuit D5, and the OR gate C1 corresponding to the OR game 1-C2 operate in the same way.
If the unlock word consisting of the code 4 is matched, the mono multivibrator 232 is triggered,
Relay driver 242 is energized and unlock relay 2
72 is energized, the unlocking solenoids (4 pieces) are energized 75, and all the doors are in the unlocked state.

Figure 2c shows the door lock control circuit on the vehicle.

In this door lock control circuit, 271 and 27□ indicate a locking relay and an unlocking relay added to carry out the present invention.

Other areas outside Tokyo have been equipped with 25
261 and 26□ indicate a vehicle speed detection and lock control circuit, and 261 and 26□ indicate relays for locking and unlocking, respectively.

Determination of input code and relay driver 24. .

24□ can be easily energized using a microcomputer system.

When making a microcomputer system in this way, as shown in Figure 3, a central processing unit (CPU)
28a1 semiconductor read-only memo! J(ROM)28b,
A receiver 19 button and a relay driver 24.degree. 242 are connected to an input/output port 28d of a microcomputer system 28 consisting of a semiconductor read/write memory (RAM) 28c and an input/output capacitor 28d.

The ROM 28b is programmed with the above-mentioned discrimination circuit 200A power word judgment logic and relay driver energization logic.

An example of the program will be described below with reference to the flowchart shown in FIG.

First, the ROM 28b stores a code forming a lock word and a code forming an unlock word at a predetermined address.

That address will be referred to as Regiko Yu hereafter, and the following 1st
Define the register names as shown in the table.

When the system 28 is connected to the power supply circuit connected to the battery on the vehicle, the receiver 19 and the relay driver 2 are activated based on the power-on program in the ROM 28b.
Power is turned on at 41.242.

Then, the input/output capo 28d's opening/locking latch and unlocking latch are reset (step ①).

When a code is input, the code is input to RAM28c or CP.
Temporarily store the code in the coat/latch address of U28a's internal RAM (step ■), compare whether the code of register a and the input code are equal, and if they are equal, move to the unlock flow ■ and enter the code of the equal 9 tresister e. If they are equal, the process moves to lock flow [F], and if they are not equal, the process returns to the 1-code input wait (step ■) (steps ■ and ■). When it arrives, it is temporarily stored in the code latch address mentioned above, and compared with the code in register b, and the input code in the second digit is the second digit code of the unlock word (memory in register b). If it is equal to , then the code input of the third digit is waited for, and if it is not equal, it is assumed that the input is incorrect and the process returns to the 71 code input standby (step ■) (steps ■ to ■).

When the 3rd digit code arrives, it is compared with the code in register C. If they match, it waits for the 4th digit code to be input, and if they do not match, it returns to waiting for code input (step ■) (steps ~ ■).

When the 4th digit code arrives, it is compared with the code in register d in steps 1 to 0), and if they match, ``1'' is stored in the input/output capo 28d, driver 242 energizing latch, and driver 24□ to start the timed operation (steps 0 to O), and when the timed time elapses, the driver 24□
Clear the energizing latch (step 0) and return to input code standby (step ■).

If the code of the fourth digit does not match the code of register d, the process returns to waiting for an input code (step ○), and the latch is set.

Lock flow [F] is also similar to unlock flow ■, but this flow ■ is based on the second to fourth digits of the manual lock word.
It is determined whether the digit matches 0 with the memory code of registers f to h.

If m matches, input/output port 2
Memorize "1" in the energizing latch of the driver 241 of 8d and energize the dry switch 24 (Step 0). Step (E5) to start the timed operation. When the cutting time has elapsed, the dry switch 24 is activated. , clear the biasing latch (step source), person?
, return to code standby (step ■).

9) The code generator 15 shown in 1c may also be a microcomputant stem.

When doing this, a character display is provided on the surface of the keyword transmitting device 10, and the
Post the ghee・9-1、-Show all Rakuta-j
That's ridiculous.

Well, depending on the example, the key word for locking and unlocking should be 4 digits or more than 1 digit. The numbers don't have to be the same.

Generally speaking, the more digits a lock word has, the easier it is to operate, and the more digits an unlock word has, the less likely it will be opened by someone else. be.

Therefore, in another embodiment of the present invention, the locking word is one digit (one code only), and the unlocking word is multiple digits (combination of multiple codes).

In addition, in the case of locking, not only is it locked by operating one specific key, but also one of several other keys (preferably keys not specified for unlocking) is activated.
It is also preferable to lock it even if one is operated.

Accordingly, in yet another embodiment of the invention:
The word for locking is one digit (one code), the number of words is set to a plurality, and locking is performed when the input word matches any one of the words.

For example, when a plurality of word data are stored in the lock word memory address of the ROM 28b and the input word (in this case, it is one digit, so it is equal to the code) matches one of the word data in the lock word address, the relay driver 24, may be energized for a predetermined period of time.

In the above embodiment, the receiving coil device 1 is installed on the vehicle.
8, the code word (lock word button and unlock word) is received by the antenna, but the code word may be received by the antenna.

As described above, in the present invention, a code word (lock word and unlock word) is transmitted by key exchange from a keyword transmitting device, and this is received by a person on the vehicle, and the received word is a fixed unlock word on the vehicle. When the received word matches the fixed lock word on the vehicle, it controls the door lock, so there is no chance of someone opening the door accidentally.

! Also, locking the door is easy.

[Brief explanation of drawings]

FIG. 1a is a plan view showing the external appearance of the keyword transmitting device 10 used in the present invention, FIG. 1b is a side view thereof, and FIG.
Figures C and 1D are plan views showing the front and back sides of the coil plate 131 housed inside. FIG. 1e is a block diagram showing the internal electric circuit of the keyword transmitting device 10. As shown in FIG. FIG. 2a is a perspective view of one vehicle implementing the invention. FIG. 2b shows a cross-sectional view of the receiving coil device 18 mounted on the vehicle, and a circuit diagram of the receiver 19 and code discrimination circuit 200. FIG. 2c is a circuit diagram showing a door lock control circuit on the vehicle. FIG. 3 is a block diagram showing the configuration of a microcomputer system 28 used in place of the cipher discrimination circuit 20, and FIG. 4 is a flow chart showing its operation. 10: Keelard transmitter, 130, 13. , : Transmission coil plate, 15: Code generator, 16: Transmitter, 17: Front window, 18: Receiving coil device, 19: Receiver, 20: Code discrimination circuit, 25: Vehicle speed detection 60-trick control circuit, 261, 271: Lock relay 262.27
□: Unlock relay.

Claims (1)

[Claims] 1. A mobile phone comprising a plurality of key switches, a code generator that generates a key switch code indicating the operated key switch, a transmitter and a transmitter coil that transmits the code using a carrier wave of a predetermined frequency. From a flexible keyword transmission device,
transmitting a key switch code; receiving the carrier wave of the predetermined frequency on the vehicle, demodulating the key switch code and comparing it with a code stored in a memory on the vehicle; a keyword consisting of one or more of the received key switch codes;
Activates the door lock control solenoid when the lock word consisting of one or more of the codes held in memory matches; When the keyword consisting of one or more of the received key switch codes matches,
A method for controlling an electromagnetic door lock on a vehicle: energizing a door unlock control solenoid when the code matches an unlock word consisting of one or more codes stored in a memory. 2. The method of controlling an electromagnetic door lock on a vehicle according to claim 1, wherein each of the lock word and the unlock word is a combination of a plurality of codes. 3. The method of controlling an electromagnetic door lock on a vehicle according to claim 1, wherein the lock word is a single code and the unlock word is a combination of a plurality of codes. 4. The method for controlling an electromagnetic door lock on a vehicle according to claim 2 or 3, wherein there is a plurality of lock words.