JPH07101314A - Transmitting device for remote control - Google Patents

Abstract

PURPOSE:To compare a check data previously created with a checked data created on the basis of a discriminating code, so that its fluctuation for whether provided or not can be known by whether both the data agree or not. CONSTITUTION:In a transmitter T, check data B0 to B3 previously produced from a check sum setting circuit 15 are output to an addition circuit part 13 of a CPU12. In the CPU12, the check data B0 to B3 are compared with a checked data created to be based on a transmission side ID code S read from an ID code memory 14. When both the data agree, an LED4 is lighted by the CPU12, simultaneously with feeding the transmission side ID code S to a decoder circuit 16, and next the code is converted into a modulation signal in a modulation circuit 18 and fed out by an infrared ray from a light emitting circuit 19. In the case of both the data not in agreement, since the LED is not lighted, voltage of a battery 17 is judged to drop. When door lock control is incapable even by lighting the LED, a transmitter T and a receiver R are judged in a trouble.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmitter for remote control.

[0002]

2. Description of the Related Art Generally, there is a door lock of an automobile that is locked or unlocked by driving a motor provided in the door. The operation of locking or unlocking the door is performed by operating a switch provided inside the door when the driver is seated in the driver's seat. When the driver locks or unlocks the door from outside the vehicle,
It is performed by inserting a key into a keyhole provided in the door and rotating the key.

Recently, a remote control device has been used to remotely lock or unlock the vehicle from the vicinity of the outside of the automobile. The transmitter of this remote control device is provided on a grip of an ignition key or a key holder. Further, the receiver of the remote control device is provided inside the vehicle.

FIG. 6 shows a block diagram of a transmitter T of a conventional remote control device. As shown in FIG. 6, the transmitter T includes an operation circuit 31, a central processing unit (hereinafter referred to as CPU) 32, a decoder circuit 33, a modulation circuit 34, and a light emitting circuit 35. The CPU 32 is connected to an ID code memory 36 that is a RAM that stores a preset identification code (hereinafter referred to as the transmission-side ID code) S. Also, the transmitter T has a built-in replaceable battery 37. The battery 37 includes an operation circuit 31, a CPU 32,
Operating power is supplied to the decoder circuit 33, the modulation circuit 34, and the light emitting circuit 35, and power is supplied to the ID code memory 36 to store and hold the transmitting side ID code S.
Further, the transmitter T is provided with a light emitting diode (hereinafter referred to as LED) 38 as a means for displaying the transmission state.

When the transmission switch provided in the operation circuit 31 of the transmitter T is pushed, the CPU 32 causes the ID code memory 36
The ID code S on the transmitting side stored in is output to the decoder circuit 33. The decoder circuit 33 performs parallel-serial conversion of the transmission side ID code S and outputs it to the modulation circuit 34. Modulation circuit 3
Reference numeral 4 frequency-modulates the transmitter ID code S at a predetermined frequency to obtain a modulated signal. This modulated signal is converted into infrared rays by the light emitting circuit 35 and transmitted. At the same time, LED38
Lights up to indicate that the modulated signal is being transmitted.
Further, the LED 38 does not light up when the voltage of the battery 37 is lowered, the capacity of the battery 37 is reduced, and the user is notified that it is time to replace the battery 37.

The infrared rays sent from the transmitter T are received by the receiver R provided in the automobile. Then, the received signal and the receiver ID code preset in the receiver R are compared, and when they match, door lock control is performed.

[0007]

By the way, even if the transmission switch of the transmitter T is pushed, the door may not be locked or unlocked. There are three possible causes for this. The first is when the capacity of the battery 37 decreases and the voltage decreases, and the voltage falls below the operating voltage of each circuit. At this time, the LED 38
Also goes out.

The second is when the door lock control signal is no longer output due to a failure of the transmitter T or the receiver R. In this case, the LED 38 may or may not be lit depending on the location of the failure.

Thirdly, there is a case where the battery 37 receives electronic noise such as static electricity and its voltage is temporarily lowered, and the transmitting side ID code S stored in the ID code memory 36 is changed. At this time, if the voltage of the battery 37 is restored, the LED 38 lights up and the transmitting side ID code S can be transmitted, but the door cannot be locked and unlocked because it is different from the receiving side ID code.

[0010] Then, the user uses the first battery 37
If the cause is a decrease in the capacity, the LED 38 will not light up and can be detected, and the door 37 can be locked and unlocked again by replacing the battery 37. But,
When the failure of the second transmitter T or the receiver R is the cause and the voltage of the third battery 37 is temporarily reduced, the transmission side I
When the D code S has changed, the LED 38 lights up when the transmission switch is pressed, so the user could not distinguish which cause was caused.

The present invention has been made to solve the above problems, and its purpose is to send a remote control for notifying the user of the cause when the identification code fluctuates and the operation cannot be performed. To provide a device.

[0012]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention according to claim 1 provides a remote control transmitter for transmitting a preset identification code by operating means. Check data setting means for setting check data created in advance based on the check data, checked data creating means for creating checked data based on the identification code each time the operating means is operated, check data and checked data The gist of the invention is to provide a discriminating means for comparing and discriminating among the above and a notifying means for notifying the discrimination result.

According to a second aspect of the invention, in the remote control transmission device according to the first aspect, the check data setting means sets the check data shorter than the identification code, and the checked data generating means is the operating means. The gist of the invention is to create checked data shorter than the identification code based on the identification code each time the operation is performed.

[0014]

Therefore, according to the first aspect of the present invention, the check data is created in advance based on the identification code. When the operating means is operated, the checked data creating means creates checked data based on the identification code. Then, the discriminating means compares the check data with the checked data, and if they match, the notifying means notifies the fact and transmits the identification code. On the contrary, if the check data and the checked data do not match, the notification means notifies the fact. Therefore, the user can know whether or not the identification code has changed by the notification means.

According to the second aspect of the present invention, since the check data shorter than the identification code and the checked data shorter than the identification code are compared and discriminated, the checked data generating means and the discriminating means are simple in construction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a transmitter of a vehicle door lock remote control device will be described below with reference to FIGS.

As shown in FIG. 2, the key holder 1 has a transmitter T built therein. A push button 2 and a light emitting diode (hereinafter referred to as LED) 4 are provided on the upper surface of the key holder 1. On the front surface of the key holder 1, a light emitting section 3 including an infrared light emitting element is provided. Further, a receiver R is provided in the interior of an automobile (not shown).

As shown in FIG. 1, the transmitter T is provided with an operation circuit 11. The operation circuit 11 is provided with the push button 2. A central processing unit (hereinafter referred to as CPU) 12 is connected to the operation circuit 11. The operation circuit 11 sends a press signal to the CP by operating the push button 2.
Output to U12.

The CPU 12 has a built-in addition circuit section 13. Further, the CPU 12 is connected with an ID code memory 14, a checksum setting circuit 15, the LED 4 as a means for displaying a transmission state, and a decoder circuit 16. The ID code memory 14 is composed of a RAM, and in this embodiment, stores a preset 24-bit identification code (hereinafter referred to as a transmission side ID code) S. The ID code memory 14 is a replaceable battery 17 built in the transmitter T.
The power is supplied by and the transmission side ID code S is stored and held.

As shown in FIG. 3, the checksum setting circuit 15 is provided for each of the 4-bit input ports I0 to I3 of the CPU 12.
To the power supply voltage Vc via resistors R0 to R3, respectively.
And is grounded through the switches 20a to 20d of the dip switch 20. Then, each switch 20a of the DIP switch 20
Data for checksum consisting of 4-bit "1" and "0" (hereinafter referred to as check data) depending on whether each input port I0 to I3 is connected to the power supply voltage Vc or grounded by selectively operating 20d to 20d. B0 to B3 are set and input to the CPU 12. This check data B0
B3 are predetermined based on the sender ID code S preset in the ID code memory 14 as follows.

That is, 6 bits from the higher order of the ID code S on the transmission side are divided into four groups G3 to G0, and the 6 bits are added to each group. The result of addition of each group G3 to G0 is the lowest 1 ignoring carry.
A bit value, and the 1-bit value of each group G3 to G0 is 4-bit checksum data from the value A3 of the highest group G3 to the value A0 of the lowest group G0 (hereinafter referred to as checked data). Create A0 to A3. When creating the checked data A0 to A3 for the normal checksum, the adder circuit unit 13 is used.
Is supposed to do.

In this embodiment, when the 24-bit transmission side ID code S as shown in FIG. 4 is set, the value A0 of the lowest group G0 is "1", and the value A0 of the lowest group G0 is The value A1 of the next group G1 is "1", the value A2 of the next group G2 is "0", and the value A3 of the highest group G3 is "1". This "1, 0, 1,
The 4-bit check data B0 to B3 is set in the CPU 12 for the checked data A0 to A3 of "1".

That is, the check data B0 is the same "1" as the checked data A0, the check data B1 is the same "1" as the checked data A1, and the check data B2 is the same "0" as the checked data A2. The value of the check data B3 is set to "1", which is the same as that of the checked data A3. In this case, the switches 20a, 20c, 20d of the dip switch 20 are opened, the input ports I0, I2, I3 are connected to the power supply voltage Vc via the resistors R0, R2, R3, and the switch 20b is closed. Then, the input port I2 is grounded. That is, "1,
Check data B0 to B3 of "0, 1, 1" is the CPU 12
Entered in.

Then, the CPU 12 executes the "1, 0, 1,
The 4-bit check data B0-B3 consisting of 1 "is compared with the 4-bit checked data A0-A3 calculated by the adder circuit unit 13 based on the transmitting side ID code S. This comparison is performed by the adder circuit unit 13. In the addition circuit unit 13, the check data B0
.About.B3 and the checked data A0 to A3 are exclusive-ORed for comparison. That is, check data B
0 and checked data A0, check data B1 and checked data A1, check data B2 and checked data A2, check data B3 and checked data A3
And take the exclusive OR respectively.

When the exclusive ORs are all "0", the check data B0 to B3 and the checked data A are checked.
It is determined that 0 to A3 match, that is, the transmitting side ID code S is a preset initial code. On the contrary, when at least one of the exclusive ORs is "1", the check data B0 to B3 and the checked data A0
~ A3 do not match, that is, it is determined that the transmission-side ID code S is not a preset initial code. In other words, when the voltage of the battery 17 temporarily drops for some reason and the 24-bit sender ID code S initially set in the ID code memory 14 fluctuates, the changed sender ID code S
The values of the checked data A0 to A3 created based on are different from the original "1,0,1,1". For example, the values of the checked data A0 to A3 are "1, 0, 1,
When it becomes "0", the exclusive OR of the check data B0 and the checked data A0 becomes "1".

When it is determined that the check data B0 to B3 and the checked data A0 to A3 do not match, C
The PU 12 does not turn on the LED 4 and informs the user that the voltage of the battery 17 has temporarily dropped and the transmission side ID code S initially set in the ID code memory 14 has changed.

On the other hand, when it is determined that the check data B0 to B3 and the checked data A0 to A3 do not match, the CP
U12 is the transmitting side I read from the ID code memory 14.
The D code S is output to the decoder circuit 16 at the next stage, and the LED 4 is turned on.

A modulation circuit 18 is connected to the decoder circuit 16. When the decoder circuit 16 receives the ID code S on the transmitting side, the decoder circuit 16 performs parallel-serial conversion and outputs the parallel-serial conversion signal to the modulation circuit 18. A light emitting circuit 19 is connected to the modulation circuit 18. The modulation circuit 18 frequency-modulates the input signal with a carrier signal of a predetermined frequency (38 kHz in this embodiment),
The modulated signal is output to the light emitting circuit 19. Light emitting circuit 19
Is provided with the light emitting unit 3. The light emitting circuit 19 causes the light emitting unit 3 to emit light based on the input modulation signal, and sends the modulation signal as infrared rays.

The operation circuit 11, the CPU 12, the decoder circuit 16, the modulation circuit 18, the light emitting circuit 19 and the LED 4 are supplied with operating power by the battery 17. Next, the operation of the remote control device configured as described above will be described.

The driver approaches the automobile and pushes the push button 2 of the key holder 1 to unlock the door. The transmitter T built in the key holder 1 outputs a depression signal to the CPU 12 by operating the push button 2. When the CPU 12 receives the press signal, it reads the ID code S on the transmitting side from the ID code memory 14. Then, the CPU 12 determines whether or not the transmission side ID code S has changed according to the flowchart of FIG. First, the CPU 12 sends the sender ID code S
6 bits from the higher order are divided into four groups G0 to G3, and 6 bits are added by the addition circuit unit 13 for each group. The result of addition is the value of the least significant 1 bit ignoring carry, and the 4-bit checked data A0
~ Create A3. (Step 1). And CPU1
Reference numeral 2 denotes 4-bit check data B0 to B3 from the checksum setting circuit 15 for each input port I0 to I of the CPU 12.
3 and the data to be checked A0 to A3 are also input to the adder circuit section 13. The adder circuit unit 13 takes an exclusive OR for each corresponding bit of both (step 2). Based on the result, the CPU 12 checks the checked data A0 created from the sending side ID code S.
.About.A3 and the check data B0 to B3 are discriminated (step 3). That is, when all the bits become "0", the CPU 12 sends the sender ID code S
Is not changed, the transmitter ID code S is output to the decoder circuit 16 and the LED 4 is turned on (step 4). The decoder circuit 16 receives the input transmission side I
The D code S is converted from parallel to serial and output to the modulation circuit 18. The modulation circuit 18 transmits the ID code S on the transmission side at a predetermined frequency.
Is frequency-modulated to obtain a modulated signal. This modulated signal is converted into infrared rays by the light emitting circuit 19 and sent out. Transmitter T
The infrared rays transmitted from the receiver R are installed in the car.
Will be received at. Then, the received signal and the receiver ID code preset in the receiver R are compared, and when they match, door lock control is performed.

On the contrary, when the voltage of the battery 17 is temporarily lowered and the ID code S on the transmitting side is fluctuated, the result of the exclusive OR of the checked data A0 to A3 and the check data B0 to B3. "1" in at least one bit of
Is output. At this time, the CPU 12 determines that the transmission side ID code S is fluctuating and does not turn on the LED 4 (step 5). Since the LED 4 does not light up even if the push button 2 is pressed in this way, the voltage of the battery 17 is temporarily reduced to the user and the ID code memory 1
It is possible to inform that the sender ID code S initially set to 4 has changed.

As described above, according to this embodiment, the checksum setting circuit 15 is provided, and the checksum setting circuit 15 outputs the check data B0 to B3 to the CPU 12. C
The PU 12 compares the check data B0 to B3 with the checked data A0 to A3 created based on the transmission side ID code S read from the ID code memory 14.
Then, when the check data B0 to B3 and the checked data A0 to A3 do not match, the CPU 12 determines that the transmission-side ID code S initially set in the ID code memory 14 has changed due to a temporary voltage drop of the battery 17. Then
The LED4 was not turned on. Therefore, when the door lock cannot be controlled by the remote control device, when the transmitter ID code S is fluctuating and the capacity of the battery 17 decreases due to the temporary decrease in the voltage of the battery 17. LED4 does not light up.
On the other hand, when the transmitter T and the receiver R are broken, the LED
4 lights up. Therefore, the user can easily know the reason why the door lock cannot be controlled by the LED 4.

In the present embodiment, the 24-bit transmission side I
The D code S is created by the adder circuit unit 13 of the CPU 12 into 4-bit checked data A0 to A3. as a result,
Since the checksum setting circuit 15 only creates relatively small check data B0 to B3 of 4 bits corresponding to the 4-bit checked data A0 to A3, the circuit scale of the checksum setting circuit 15 can be reduced. .

The present invention is not limited to the above-mentioned embodiments, and within the scope not departing from the gist of the present invention,
For example, you may change as follows. (1) In the above embodiment, the invention is applied to the case of transmitting and receiving using infrared rays, but it may be applied to the case of transmitting and receiving using short waves and the like.

(2) In the above embodiment, the transmitter T of the present invention is used.
Was applied to the key holder 1 when the transmitter T
May be applied when mounted on the ignition key 5 as shown in FIG.

(3) In the above embodiment, when the checked data A0 to A3 and the check data B0 to B3 do not match, the LED4 is not turned on to notify the user. A notification method such as blinking or sound notification may be adopted.

(4) In the above embodiment, 6 bits each from the higher order of the 24-bit transmission side ID code S are divided into four groups G0 to G3, and 6 bits are added to each group to obtain 4 bits. Checked data A0-A3
However, it is not necessary to divide the number of bits into the groups G0 to G3 evenly.
It may be divided into 0 to G3. In this case, check data B
It is necessary to set 0 to B3 in advance according to this.
It is also possible to add all 24 bits and ignore the carry of the 5th bit onward from the least significant bit of the addition result to create 4-bit checked data A0-A3. Also in this case, similarly, it is necessary to preset the check data B0 to B3 in accordance with this.

(5) Although the check data is 4 bits in the above embodiment, the number of bits of the check data may be any number. By increasing the number of bits, it is possible to more reliably determine whether the check data and the checked data match.

(6) In the above embodiment, the setting of the check data of the checksum setting circuit 15 is set by the DIP switch 2
It was set to 0, but the DIP switch 20
Instead of the above, "1" or "0" may be set depending on whether the wiring pattern is broken or not broken.

[0040]

As described in detail above, according to the invention described in claim 1 of the present invention, there is an excellent effect that the user can know the presence or absence of the change of the identification code by the notifying means.

According to the second aspect of the invention, there is an excellent effect that the checked data creating means and the judging means can be simply structured.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment in which the present invention is embodied in a transmitter of a vehicle remote control device.

FIG. 2 is a key chain, an ignition key and a receiver R.
FIG.

FIG. 3 is a circuit diagram showing a checksum setting circuit.

FIG. 4 is a format diagram when creating checked data from a sender ID code.

FIG. 5 is a flowchart showing a comparison / discrimination processing operation of a transmission side ID code of a CPU.

FIG. 6 is a block diagram showing a conventional vehicle remote control device.

[Explanation of symbols]

4 ... LED as notification means, 11 ... Operation circuit, 12 ...
CPU as discriminating means, 13 ... Adder circuit section as checked data creating means, 15 ... Check sum setting circuit, S ... Sending side ID code, A0-A3 ... Checked data, B0-B3 ... Check data, T ... Transmitter.

Claims (2)

[Claims] 1. A remote control transmitting device for transmitting a preset identification code by operating means, wherein a check data setting means for setting check data created in advance based on the identification code and an operating means are operated. Each time the remote control is provided with a checked data creating means for creating checked data based on the identification code, a judging means for comparing and judging the check data and the checked data, and a notifying means for notifying the judgment result. Transmitter. 2. The remote control transmission device according to claim 1, wherein the check data setting means sets check data shorter than the identification code, and the checked data creating means each time the operating means is operated. A remote control transmission device that creates checked data shorter than an identification code based on the identification code.