JPH0645985B2 - Remote control device for vehicle lock - Google Patents

Description

The present invention relates to a remote control for locking and unlocking a lock provided on a door or trunk of a vehicle such as an automobile at a position remote from the vehicle. Regarding the device.

"Prior Art" As a device for remotely controlling an automobile door or a lock of a trunk, a device having a structure shown in FIG. 6 is known.

In this figure, A is a transmitter that can be carried and used, B
Is a receiver installed in a car. Transmitter A
Is composed of a signal processing unit (microcomputer) 1, a key code setting unit 2, a driver 3, an infrared light emitting diode 4 and an operation switch 5, and transmits an infrared signal according to the key code information as a control signal.

The receiver B is a signal processing unit (microcomputer)
6, a light receiving section consisting of an infrared filter 7 and a photo diode 8, a light receiving amplifier 9, a collation code setting section 10, a driver 11, a lock driving section 12, and a sensor switch 13, and sends a control signal sent from a transmitting device. Upon reception, the locked lock is unlocked, and the unlocked lock is controlled to be locked.

Also, the sensor switch 13 is Low when unlocked.
When the signal is locked, a High signal is sent to the signal processing unit 6, and the signal processing unit 6 outputs a locking signal by receiving a control signal while receiving the Low signal, and vice versa. When a control signal is received while receiving, the signal processing unit 6 outputs an unlock signal.

"Problems to be Solved by the Invention" In the remote control device described above, the signal processing unit of the receiving device B mounted on the automobile is constantly fed by the power supply circuit, and thus the power consumption by the signal processing unit is a problem. Become.

Many electric parts such as car radios, car lighters, electronic timepieces, and anti-theft devices have been installed in conventional automobiles. Leakage current due to electrical components increases.

For this reason, it is necessary to reduce the power consumption of the above-mentioned electric components as much as possible so as not to impair the operation of each device required for safe driving such as engine start and proper lighting of headlights.

[Means for Solving Problems] In view of the above problems, the present invention is to reduce the power consumption of a signal processing unit included in a receiver for remote control to the maximum. It was developed with the main purpose of making sure to retain the code information. Therefore, in the present invention, the vehicle is provided with a receiving device and a transmitting device independent of the vehicle, and the receiving device responds to a control signal of the transmitting device transmitted from a position away from the vehicle. In a remote control device that controls locking and unlocking of a lock, the receiving device includes a signal processing unit that performs a signal processing operation in response to a control signal and outputs a lock control signal. And a memory means for storing various error code signals, which starts operation upon input of a start signal included in the above, and automatically stops operation upon completion of signal processing according to a predetermined program. We propose a remote control device for vehicle lock.

[Operation] In the remote control device of the present invention, the signal processing unit provided in the receiving device is constantly supplied with power by the power supply circuit of the vehicle, and the signal processing unit responds to the control signal from the transmitting device to provide a predetermined signal. Since the operation is automatically stopped when the processing is performed, only the power supply current for operating the memory means flows in the standby state.

Therefore, the signal processing unit temporarily consumes power in response to the control signal, but thereafter consumes very little power to maintain the memory of the memory means.

The code information stored in the memory means is read out,
It can be used as a reference material for investigating the cause of malfunctions and failures.

[Examples] Next, examples of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a receiving device of a remote control device, and 21 is a signal processing unit which is always supplied with a constant voltage Vo from a power supply circuit 22 of an automobile.
This is configured by a microcomputer, and starts operation by inputting a reset signal S ₄ sent from the reset circuit 23, and controls the lock drive unit 24 to lock or unlock by a predetermined signal processing operation according to a program. The signal Po is output.

The signal processing unit 21 has a configuration in which a stop command is executed at the time when a predetermined operation according to a program ends, and the subsequent signal processing operation is automatically stopped. This stop command can be issued by stopping the oscillation of the clock pulse. Further, the signal processing unit 21 is provided with a RAM which is an IC memory as a memory means. This RAM stores the error code signal. For example, the lock was not actually locked even though the lock control signal Po was output from the signal processing unit 21, and conversely, the lock was not unlocked when the unlock control signal Po was output. It is stored as an error code signal at the time. The sensor switch 25 detects whether the lock is actually locked or unlocked according to the control signal Po. This sensor switch 25 is, for example, High during locking.
While the signals are unlocked, a Low signal is supplied to the signal processing unit 21, and if the lock is driven correctly according to the control signal Po, these signals change from High to Lo.
It changes from w or Low to High. Therefore, since the output signal of the sensor switch 25 does not change when the locked or unlocked state is maintained according to the control signal Po, the signal processing unit 21 determines this abnormal state and writes the error code signal in the RAM. .

As the error code signal, when the control signal sent from the transmitting device is different, noise signal gets into this control signal and it is difficult to judge the key code, etc. It can be written to RAM as a signal.

The contents of the RAM are read out as a check signal (output signal Po) from the signal processing unit 21 by a dealer or the like, which is useful for early resolution of malfunctions or failures, or used as reference material for improvement.

On the other hand, the reset circuit 23 generates the reset signal S ₄ when the power supply voltage Vo is applied, when the control signal So is received, and when the signal processing unit 21 runs out of control.

The receiving device is constantly fed with a constant voltage Vo from the power supply circuit 22, but at the beginning of this feeding, the reset signal S ₄
Generate. From this, the signal processing unit 21 executes the predetermined operation and then executes the stop command to shift to the standby mode.

Optical control signal So from the transmitter as an infrared signal
Is received, the light receiving amplifier 26 receives the light, and the output thereof is sent to the signal processing unit 21 and the reset circuit 23 as the control signal S ₁ . The control signal S ₁ includes a start signal, and the reset circuit 23 outputs the reset signal S ₄ when the start signal is input. Signal processing unit 2
1 starts its operation by inputting this reset signal, processes the control signal S ₁ according to a predetermined program, compares it with the code signal of the focusing code setting section 27, and outputs the control signal Po.

As described above, when the signal processing unit 21 starts operating with the input of the reset signal S ₄ , the high voltage as the active signal S ₂ sent from the signal processing unit 21 is the reset circuit 23, the sensor switch 25, and the focusing code setting. Join part 27.

Further, the reset circuit 23 receives the output signal S ₃ (hereinafter, referred to as WDT signal) of the watchdog timer of the signal processing unit 21, so that the signal processing unit 21 performs the runaway operation and the W.D. D. The T signal S ₃ is continuously Low for a predetermined time.
When it becomes the level or the High level, this state is detected and the reset signal S ₄ is output.

Figure 2 is a circuit example showing a specific example of the reset circuit 23, when the power supply voltage Vo is applied to the terminal 23a, the differential signal by the capacitor 28 and the resistor 29 is output from the terminal 23e as a reset signal S ₄ Also, when the control signal S ₁ is supplied to the terminal 23b, the capacitor 30
Differential signal by the above resistor 29 is outputted from the terminal 23e as a reset signal S ₄ and.

In addition, W. D. When the T signal S ₃ continuously becomes the Low level or the High level and the charging voltage of the capacitor 31 of the circuit constituted by the capacitor 31 and the resistor 32 drops to a certain value, the transistor 33 is turned on.
Then, the active signal S ₂ supplied to the terminal 23c is added to the capacitor 30 and the resistor 29, and at this time, the reset signal S ₄ is output from the terminal 23e.

Next, the operation of the above receiving apparatus will be described with reference to the time chart shown in FIG.

When the power supply voltage Vo is applied as shown in FIG. 3A, the reset circuit 23 causes the reset signal S of FIG.
₄₀ , the signal processing unit 21 starts to operate from this, and the active signals S ₂ and W. D. The T signal S ₃ is generated, and thereafter, the signal processing unit 21 executes the stop command, and the hatched portion f in FIG.
Move to standby mode as ₁ .

As described above, the operation of the signal processing unit 21 is stopped in this standby mode.

When the optical control signal So is transmitted from the transmitting device in the standby state, the light receiving amplifier 2 which receives the optical control signal So is received.
The output of 6 is the signal processing unit 21 as the control signal S _1.
And input to the reset circuit. The control signal S ₁ includes the start signal S ₁₀ as shown in FIG. 3B, and the reset circuit 23 outputs the start signal S _{10 to the} start signal S _10.
To output the reset signal S ₄₁ . The signal processing unit 21 receives the reset signal S ₄₁ and starts operating, and the active signals S ₂ , W. D. The T signal S ₃ is generated, the control signal S ₁ is processed, and the control signal Po is output. Then, after the signal processing is completed, the third
The stop command is executed as indicated by the shaded portion f ₂ in FIG.

Further, when the signal processing unit 21 performs the runaway operation, the W.
D. T signal S ₃ is continuously Low level or High
Since it becomes the level, the time To determined by the time constant of the capacitor 31 and the resistor 32 shown in FIG. 2 (see FIG. 3)
After the passage of, the reset signal S ₄ x is generated. As a result, it is possible to return the signal processing unit 21 that is running out of control to the normal state.

On the other hand, in order to read the error code signal stored in the RAM of the signal processing unit 21, the special optical control signal So having the “check code” is received. When receiving the optical control signal So, the receiving device outputs the error code signal stored in the RAM as the output signal Po of the signal processing unit 21. As described above, when the content of the RAM is read out, it is performed during the production process or the repair process of the vehicle. Therefore, in order to clear the content of the RAM at the time of shipment or after the repair, a special optical control signal having a "data clear code" Causes the receiving device to receive So.

4 and 5 are flow charts of the signal processing unit 21 described above.

As shown in the figure, a reset signal S ₄ is input to start, and after initialization, a high voltage is generated as the active signal S ₂ and the W.V. D. The T signal S ₃ is generated and subsequently the control signal S ₁ is read. Next, it is judged whether the format is normal or not. When the format is not normal, the active signal S ₂ becomes Low level and the stop command is immediately executed.

When the normal format is confirmed, the control signal S
_If the check code is present, the process goes to an error code reading loop, and if there is no check code, the process goes to a lock control loop.

That is, when the control signal S ₁ having no check code is confirmed, the control signal S ₁ is compared with the collation code.
At the same time as being stored in the AM, the active signal S ₂ becomes Low level and the stop command is executed.

If the control signal S ₁ matches the collation code,
Depending on the signal sent from the sensor switch, it is determined whether it is in the locked state or the unlocked state. If it is in the locked state, set "0" in the flag register and output the unlocking control signal.
If it is in the unlocked state, "1" is set in the flag register and the lock control signal is output.

After the control signal for locking or unlocking is output, whether the lock is actually locked by reading the output of the sensor switch 25,
Further, if it is confirmed that the lock is released, and if the lock is properly driven according to the control signal, the active signal S ₂ becomes Low level and the stop command is executed after the flag register is set to “1”. .

If the lock does not drive regardless of the output of the control signal and remains locked or unlocked, "n" is written in the flag register.
+1 "is set and is denied in the confirmation step of setting" 1 "in the flag register. In this case, if the flag register is" 0 ", an error code signal indicating that the lock is not unlocked is stored in the RAM. is, when the flag register is not "0" in the error code signal, which means that it is not locked are stored in the RAM, then the stop instruction is executed by the active signal S ₂ is the Low level.

In step ST100, the control signal when it is confirmed that S ₁ is to have a check code is performed to read the contents of RAM to output a check signal.

In the next step, the control signal S ₁ is read, and it is judged whether or not the signal S ₁ has a data clear code. If the data clear code is confirmed, the error data stored in the RAM After being cleared, the active signal S ₂ becomes Low level and the stop command is executed. When the data clear code is not confirmed, it is judged whether or not the user has the check code. When the check code is present, the process returns to the error data reading step described above, and when the check code is not present, the process returns to the control signal S ₁ reading step.

Although one embodiment of the present invention has been described above, the optical control signal So may not be necessarily infrared light and may be a normal electric wireless signal. In this case, the light receiving amplifier 26 serves as an electric wireless receiving amplifier. Constitute.

[Advantages of the Invention] As described above, in the remote control device of the present invention, the signal processing unit provided in the receiving device inputs the start signal included in the control signal to start the operation, and performs the signal processing according to the predetermined program. Since the operation is automatically stopped by the end of, the power consumption in the normal standby state is extremely small even though the signal processing unit is constantly fed by the power supply circuit. Since it can be easily configured by setting, it does not require additional device parts, which is extremely advantageous in production work and production cost.

In addition, since the error code signal can be saved by the memory means of the signal processing unit, if this error code signal is read, it can be used as an important reference material that is useful for investigating the cause of device malfunction, failure, or improving the device. can do.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a receiver provided in the remote control device according to the present invention, and FIG. 2 is a circuit diagram showing a specific example of a reset circuit provided in the receiver,
FIG. 3 is a time chart for explaining the operation of the receiving device, FIGS. 4 and 5 are flow charts of a signal processing unit provided in the receiving device, and FIG. 6 is a remote control device shown as a conventional example. It is a block diagram. 21 ... Signal processing unit 22 ... Power supply circuit 23 ... Reset circuit 24 ... Lock drive unit 25 ... Sensor switch 26 ... Light receiving amplifier 27 ... Verification code setting unit

Claims (1)

[Claims] 1. A vehicle equipped with a receiving device and a transmitting device independent of the vehicle, wherein the receiving device operates in response to a control signal from the transmitting device transmitted from a position remote from the vehicle. In a remote control device for controlling locking and unlocking, the receiving device includes a signal processing unit that performs a signal processing operation in response to a control signal and outputs a lock control signal, and the signal processing unit is included in the control signal. A vehicle including a stop means for starting an operation by inputting a start signal, and automatically stopping the operation when signal processing according to a predetermined program is completed, and a memory means for storing various error code signals. Remote control device for tablets.