JPH0585309A - Anti-theft device for vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] It is possible to start the operation of the anti-theft function without opening and closing the door during remote operation. [Structure] A door switch 4, a trunk switch 5, and a hood switch 6 are connected to the control device 1 as inputs,
After these operations, when the key lock state is detected by the output from the key lock / key unlock switch 7, the anti-theft function is enabled. The receiving device 20
When the signal is received by the antenna 21, the key unlock signal or the key lock signal is derived. The key unlock signal or the key lock signal is given to the hood input of the control device 1 via the diode 22. That is, a pseudo signal indicating that the hood has been opened / closed can be derived to start the operation of the anti-theft function.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antitheft device for a vehicle such as an automobile, and particularly for a vehicle which opens and closes a door by remote control.

[0002]

2. Description of the Related Art There are various types of methods for setting a vehicle anti-theft device. One example is a system in which the anti-theft function is set when the door is locked after it is detected that the door has been opened. is there. This system applies a series of operations in which the driver opens the door and dismounts when the driver leaves the vehicle, and closes and locks the door.

On the other hand, in recent years, the number of devices for remotely controlling the locking and unlocking of the door by remote control has increased, and many systems combine a theft prevention device and a remote device for the door.

[0004]

SUMMARY OF THE INVENTION However, a system for setting security is provided on condition that the door is once opened and then closed, and then the door is locked, and a remote control is used to remotely lock and unlock the door. If a system that performs the operation of is combined, the security function will malfunction. That is, with respect to door locking and unlocking by remote control, it is possible to confirm at a position away from the vehicle by, for example, turning on the headlight once or twice, but this operation is not necessarily performed once. It is not always done. In some cases, further operations are performed for careful confirmation, and in some cases, for the sake of mere interest, some operations are performed by playing. In such locking and locking of the door by remote control a plurality of times, since the door is not opened and closed, the security function is set only at the first operation immediately after the person gets out of the vehicle and closes the door. After that, if the remote control operation is performed while the door is closed, the security function remains reset by the door unlock operation even if the door is locked. Therefore, when attempting to lock the door by remote control at the same time as setting the security function, it is necessary to surely perform the first operation and confirmation of the remote control device after closing the door. Thus, great care must be taken when using the remote control.

An object of the present invention is to provide an antitheft device for a vehicle, which can surely operate an antitheft function without opening and closing a door even during remote operation such as remote control.

[0006]

According to the present invention, an antitheft function is activated when a door lock operation is detected after detecting that a vehicle door is closed, and an antitheft function is detected when a door unlock operation is detected. In a vehicle anti-theft device including a control device whose function is stopped, a remote operation means for generating a signal indicating a lock operation or an unlock operation for a door by remote operation and giving the signal to the control device, and a remote operation means. A vehicle theft characterized by including pseudo signal generating means for providing a control device with a pseudo signal indicating that the door is opened / closed when the door is locked or unlocked in response to the output. It is a prevention device.

Further, the present invention is characterized in that the pseudo signal is a signal indicating that the hood of the vehicle has been opened and closed.

[0008]

According to the present invention, in the vehicle, the anti-theft function is activated when the door lock operation is detected after the door is closed, and the vehicle is stolen when the first door unlock operation is detected. A control device is included in which the prevention function is stopped. The remote operation means generates a signal indicating a lock operation or an unlock operation of the door by remote operation and gives the signal to the control device. The pseudo signal generation means responds to the output from the remote control means and gives a pseudo signal to the control device, which indicates that the door is opened / closed, when the door is locked or unlocked. When the pseudo signal indicating that the door has been opened / closed is given, the control device activates the antitheft function. In this way, the antitheft function can be surely started even by a door lock operation by remote control.

According to the invention, a signal indicating that the hood has been opened and closed is used as the pseudo signal. Since the lamp is not turned on when opening and closing the hood, power consumption does not increase.

[0010]

1 shows a schematic electrical construction of a vehicle antitheft device according to an embodiment of the present invention. The control device 1 is
Including opening and closing control of the door, including a microcomputer,
Controls security, that is, anti-theft function. The electric power for operating the control device 1 and the like is a battery (abbreviated as “BAT
T ") 2. The control device 1 has switching states such as an accessory (abbreviation “ACC”) switch 3, a door switch 4, a trunk switch 5, a hood switch 6, a key lock / key unlock detection switch 7, and a lock / unlock detection switch 8. Corresponding inputs are given. The ACC switch 3 is turned on when a key is inserted into the ignition switch and the ACC switch 3 is operated from the off state to the acc. State and thereafter. Door switch 4 is the first
It is a switch that interlocks with the opening and closing of the door, which is usually the front door or the rear door. Hereinafter, when simply referred to as “door”, it means the first door. The trunk switch 5 is a switch interlocking with opening and closing of a trunk door or a luggage door. The hood switch 6 is a switch that interlocks with the opening and closing of the hood or the hood that is the second door. The key lock / key unlock detection switch 7 is a switch for detecting a lock operation or an unlock operation of a key with respect to a door for entering and leaving the driver's seat. The key unlock is grounded via the resistor 7a. The lock / unlock detection switch 8 is opened or opened when the door is locked and shorted or shorted when the door is unlocked.

On the output side of the control device 1, a door lock motor 9, a door unlock motor 10, a head lamp 11,
The horn 12 and the like are connected. When the door lock motor 9 is driven, the door is locked. When the door unlock motor 10 is driven, the door is unlocked. The headlamp 11 and the horn 12 are used as an alarm for theft prevention and as a confirmation for locking / unlocking the door. When the door is open, an interior light (not shown) is illuminated, and when the trunk door is open, a trunk lamp (not shown) is illuminated. It is convenient when it is dark because the interior lights and the trunk lamps light up when the doors for getting in and out of the vehicle and the doors for the trunk are opened. Therefore, the door switch 4 and the trunk switch 5 are
Also called a courtesy switch.

The receiving device 20 is used to remotely control the locked state of the vehicle door by remote control. Radio waves from the transmitting device for operation are received by an antenna (abbreviation “ANT”) 21. Receiver 20
Generates a key unlock signal when the door is in the locked state from the state of the lock / unlock detection switch 8 and a key lock signal when the door is in the unlocked state. For example, the headlamp 11 is turned on to confirm that the signal has been received externally. Further, the horn 12 can be sounded remotely to prevent the vehicle from being stolen.

The key unlock output terminal of the receiver 20 is connected to the hood input terminal of the controller 1 via the diode 22. The key lock output terminal is connected to the hood input terminal via the resistor 23 and then the diode 22. That is, the diode 22, as a pseudo signal generating means, gives a pseudo signal indicating that the hood is opened and closed to the control device 1 when the receiving device 20 derives the key unlock output or the key lock output.

FIG. 2 shows an electrical configuration of the control device 1 shown in FIG. The control circuit 30 includes a microcomputer and the like, and controls the opening / closing of the door and the anti-theft function according to a preset program. The control circuit 30 is supplied with a DC voltage stabilized at 5V from the + B power source through the constant voltage power source circuit 31. + B
Is, for example, 12.6V. Other constant voltage power supply circuit 3
From 2, the DC voltage stabilized at 10 V is applied to the switch circuit 33. The switch circuit 33 is the control circuit 3
0 turns on for 200 μs, and
It is controlled to be OFF for m seconds.

The output from the switch circuit 33 is a resistor 34.
It is given to the key lock / key unlock input terminal 35 via. The switching state of the key lock / key unlock detection switch 7 shown in FIG. 1 connected to the key lock / key unlock input terminal 35 is the level discrimination circuit 36.
Detected by. The level difference due to the presence or absence of the resistor 7a is discriminated to determine whether the key is locked, unlocked, or neither. From the switch circuit 33, through the resistor 37,
An output is given to the input terminal 38. The input terminal 38 has
The door switch 4, the trunk switch 5, the hood switch 6 or the lock / unlock detection switch 8 shown in FIG. 1 are connected. The potential of the input terminal 38 is the resistance 39
The voltage is divided by the resistor 40 and applied to the control circuit 30. A signal from the ACC input terminal 41 is also given to the control circuit 30. The output of the control circuit 30 is connected to the output terminal 43 via, for example, a switching circuit including a transistor 42. The door lock motor 9, the door unlock motor 10, the headlamp 11, the horn 12 and the like shown in FIG. 1 are connected to the output terminal 43.

FIG. 3 shows signal waveforms during operation of the anti-theft device shown in FIG. When the remote control operation shown in FIG. 3 (1) is performed, the receiving device 20 is displayed in FIG. 3 (2) or FIG. 3 (3).
The key lock output or the key unlock output shown in is alternately derived. FIG. 3 (4) shows a signal waveform given to the hood input of the control device 1 via the diode 22.
When the remote control is not operated, it is at the high level Vh (the hood is closed). When the key lock output is derived, the level V added with the voltage drop due to the resistor 23
The output of V2, which is 1 and is almost at the ground level, is given to the key unlock output. Since the hood input discriminates the input at the discrimination level Vd, both V1 and V2 have a low level (indicating that the hood is open).
Is given to the hood input terminal as. The key lock / key unlock input terminal of the control device 1 is also supplied with the same signal as in FIG. 3 (4), but the level discrimination circuit 36 shown in FIG. 2 discriminates the level of V1 from the level of V2. . The control device 1 corresponds to the state of the key lock / unlock switch 7, and the door lock motors 9, 1
Control 0. The security is in the set state,
It is about 10 seconds after the key lock is output.

FIG. 4 shows the operation of the control device 1. It starts at step a1 and the antitheft function is once reset at step a2. In steps a3, switches 4-6
Based on the above, it is determined whether or not the door, trunk or hood for getting on and off (hereinafter collectively referred to as "door") is open. If any one of the doors is open, the process waits until the door is closed in step a4, and if it is detected that the door is closed, it is determined in step a5 whether the door will be opened again. If it is closed, it is then determined in step a6 whether or not the door is in the locked state, and steps a5 and a6 are repeated until the door is locked. When the door is opened midway, the process returns from step a5 to step a4 and waits for the door to be closed again. When the locked state is detected in step a6, it is determined in step a7 whether this state has continued for 10 seconds, and if not, steps a5 and a6 are repeated. When 10 seconds have passed, the process proceeds to step a8, and the theft prevention function is set.

With the anti-theft function set,
In step a9, it is determined whether the door is unlocked. When the door is unlocked, the process returns to step a2 and the antitheft function is reset. When the door is locked, it is determined in step a10 whether the door, the trunk or the hood is opened. If it is not opened, the process returns to step b9. Step a10
If it is detected that the door has been opened, the door is opened without unlocking, and an alarm using the headlamp 11 and the horn 12 is generated in step a11.

FIG. 5 shows the operation of the receiver 20 shown in FIG. Starts at step c1 and A at step c2
It is determined whether the CC switch 3 is off. If it is in the OFF state, the process proceeds to step c3, and it is determined whether or not a remote control signal is received. When the remote control signal is received, the process proceeds to step c4, and it is determined whether or not it continues for a predetermined time. When the signal is for only a short time, the process proceeds to step c5, and it is judged from the lock / unlock detection switch 8 whether the door is in the locked state till then. In step c6, the key lock signal is output and the headlight 11 is turned on only once. If it is in the locked state in step c5, the process proceeds to step c7, the key unlock signal is output, and the headlight 1
1 lights up twice. The receiving device 20 repeats the above operation.

At steps c6 and c7, the key lock signal or the key unlock signal is output, so that the signal is given to the hood input terminal of the controller 1 through the diode 22 shown in FIG. As a result, even if the transmitter is unlocked and locked again for confirmation after locking, the hood is opened and closed in a pseudo manner, and the security function is set. If it is determined in step c4 that the time is long, the horn 12 or the like is sounded to give an alarm. When the vehicle is likely to run away,
It can be countered by remote control.

In the above embodiment, the pseudo signal is applied to the hood, but it may be applied to the door or the trunk. However, when a pseudo signal is given to the door or the trunk, the control device 1 controls the motor 9 or 10 to open the door or the trunk by the pseudo signal. Lights up, which increases battery consumption. On the other hand, in the case of a hood, the hood is not controlled by the control device 1 and the lamp does not light up, so it is most desirable in terms of battery power consumption.

In the above embodiment, the pseudo signal is output both when the receiving device 20 sends the key unlock signal and when sending the key lock signal. However, the key unlock signal is sent. The pseudo signal may be output only when the operation is performed.

[0023]

As described above, according to the present invention, the operation of the antitheft function of the control device can be started even when the door is locked by remote control. by this,
The anti-theft function can be reliably started even if the door is repeatedly locked and unlocked by remote operation, and the number of operations is limited in consideration of the effect on the anti-theft function in remote operation. It is not necessary to check the locked state by remote control any number of times.

Further, according to the present invention, when the door is locked or unlocked by each operation, a pseudo signal indicating that the hood has been opened and closed is generated. Since the lamp or the like is not turned on when the hood is opened or closed, it is possible to avoid power consumption caused by turning on the lamp or the like. In particular, since the remote operation is performed with the engine stopped and its electric power is supplied from the battery, it is possible to avoid exhaustion of the battery when the remote operation is repeated.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of a control device 1 shown in FIG.

FIG. 3 is a waveform diagram showing an operation of the anti-theft device shown in FIG.

4 is a flowchart showing an operation of the control device 1 shown in FIG.

5 is a flowchart showing an operation of the receiving device 20 shown in FIG.

[Explanation of symbols]

 1 Control Device 2 Battery 3 ACC Switch 4 Door Switch 5 Trunk Switch 6 Hood Switch 7 Key Lock / Key Unlock Detection Switch 8 Lock / Unlock Detection Switch 9 Door Lock Motor 10 Door Unlock Motor 11 Headlamp 12 Horn 20 Receiver 22 diode 30 control circuit

Claims (2)

[Claims] 1. A control device for starting an anti-theft function when detecting a door locking operation after detecting that a vehicle door is closed, and stopping the anti-theft function when detecting a door unlocking operation. In vehicle anti-theft devices, including remote control devices that generate a signal that indicates a lock or unlock operation to the door by remote control, and that responds to the output from the remote control means and the remote control means to lock the door. An anti-theft device for a vehicle, comprising: a pseudo signal generating unit that gives a pseudo signal to a control device when the door is opened or closed when an operation or an unlock operation is performed. 2. The antitheft device for a vehicle according to claim 1, wherein the pseudo signal is a signal indicating that the hood of the vehicle has been opened and closed.