JPH0747928A - Burglaproof device for vehicle - Google Patents

Abstract

PURPOSE:To aim at improvement of burglarproof effect by making it possible to continue alarm action after restoring the power supply even if the power supply is temporary cut off by a burglar, CONSTITUTION:When a lock signal is sent from a remote key 2, a control device 1 executes warning mode routine with all doors in the closed condition and, when respective cartesian switches 7, 9, 10 of a door, a trunk and an engine hood or a foray sensor 11 detect an illegal entry, it makes an alarm action by causing a position lamp 13, a tail lamp 14 and a horn 15 to make action and also causes an EEPROM 16 to memorize the execution of the alarm action. Because, even if the power supply is temporary cut off during the alarm action, the alarm actions immediately start again by the EEPROM 16 having memorized the execution of the alarm actions when the program is started after resorting the power supply, burglarproof effect is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when a lock signal is transmitted from a portable transmitter, controls a door lock mechanism to perform a lock operation and sets a warning mode state by a control means so as to prevent an unauthorized intruder. The present invention relates to an anti-theft device for a vehicle, in which an alarm operation is performed by an alarm means when detected.

[0002]

2. Description of the Related Art Recently, in automobiles as vehicles,
Some doors can be locked and unlocked by remote control without using keys. That is, when a lock signal or an unlock signal is transmitted using a remote key as a portable transmitter, the receiving device provided on the automobile side receives the signal and outputs a drive signal from the control device to the door lock mechanism. The lock operation or the unlock operation is performed, and the user does not need to insert the key into the door key cylinder and rotate the key each time, which is excellent in usability.

In this case, since the radio signal transmitted from the remote key is provided with an identification code for identifying the corresponding vehicle, the radio signal is identified even if a lock signal or an unlock signal is received from another remote key. If the codes do not match, the door lock mechanism cannot be operated. Since the number of combinations of the identification code increases as the number of digits increases, the identification code is not easily deciphered by a third party and can be extremely safe against theft. .

However, in case of an emergency, a door key cylinder is provided so that the door can be mechanically locked and unlocked as in the conventional case. If it is given, there is a risk of theft.

Therefore, recently, for example, if all the doors are in a closed state when a door lock signal is received from a remote key, the controller locks the door lock mechanism and sets a warning mode to steal the door. There are some that are designed to prevent this.

That is, in this setting mode of the warning mode, the control device causes the door lock mechanism to perform the unlocking operation and release the warning mode only when the unlock signal from the remote key is received. Therefore, when the door is opened by other means, an alarm operation is performed based on a detection signal from a door courtesy switch, an intrusion sensor, or the like.

In this alarm operation, for example, a horn is sounded, a position lamp and a tail lamp are operated to blink so that attention is given to the surroundings. It is possible to give up and prevent theft from occurring as much as possible.

[0008]

However, in carrying out such an illegal act, for example, the engine hood is illegally opened, and at the same time, the terminal of the on-vehicle battery as a power source is removed to supply power to the control device. It is possible that it will be cut off. In this case, the security program of the control device that controls a series of operations is interrupted, so when the terminal of the on-vehicle battery is reconnected and power is supplied after that, the control device executes the security program from the beginning. Will be done. Then, in the initial state, the execution mode of the warning mode and the alarm operation is canceled, and in this state, there is a problem that the degree of fraud is extremely high and the antitheft effect is reduced.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an alarm after the power is restored even if the power is temporarily cut off while the alarm is being performed due to theft. (EN) Provided is a vehicle antitheft device capable of continuously performing an operation and improving an antitheft effect.

[0010]

According to the present invention, when a door lock signal is transmitted from a portable transmitter when a door is closed and a door is closed, a door lock mechanism performs a locking operation and a warning mode state is set. However, the present invention is intended for a vehicle antitheft device provided with a control means for performing an alarm operation by an alarm means when an unauthorized intruder is detected, and a non-volatile storage means for storing the alarm operation when the alarm operation is carried out. Is provided and the control means is configured to execute the alarm operation immediately after the power is turned on when the execution of the alarm operation is stored in the storage means.

[0011]

According to the vehicle antitheft device of the present invention, when the control means detects an illegal intrusion while the warning mode is being executed,
Since the alarm operation will be started and the implementation will be stored in the non-volatile storage means, even if the power is cut off during execution of the alarm operation, the alarm operation will be stored in the storage means immediately after the power is restored. When the execution is stored, the alarm action is immediately executed, so that the illegal intrusion act can be abandoned and the theft prevention effect is improved.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an automobile will be described below with reference to the drawings. In FIG. 1 showing an outline of an electrical configuration, a control device 1 as a control means provided on the vehicle body side of an automobile includes a CPU, a ROM, and a R.
A security program is stored in advance, which is composed of a microcomputer including AM.

The remote key 2 is used to remotely perform a locking operation and an unlocking operation of a door (not shown) of this automobile, and a key plate 2a as a key for mechanically opening and closing the door. It is composed of a key grip 2b for holding it. The key grip 2b is provided with a lock switch 3 for transmitting a lock signal and an unlock switch 4 for transmitting an unlock signal. When these are pressed, a lock is performed by a transmission circuit (not shown) incorporated inside. The signal or unlock signal is output as a radio wave signal.

On the other hand, a receiving device 5 for receiving a radio signal from the remote key 2 is provided on the automobile side and is connected to the input terminal P1 of the control device 1. When receiving the radio wave signal via the antenna 5a, the receiving device 5 demodulates the radio wave signal into a lock signal or an unlock signal and inputs the signal to the control device 1.

The door (not shown) is provided with a door lock mechanism 6 which is driven in accordance with the rotation of the door key cylinder. The door lock mechanism 6 is locked by a turning operation in the lock side direction and is rotated in the unlock side direction. It is designed to be unlocked by dynamic operation. Further, as will be described later, when the door lock mechanism 6 receives a lock signal or an unlock signal from the output terminal Q1 of the control device 1 via the drive circuit 6a, the door lock mechanism 6 operates according to the lock signal or the unlock signal. It has become.

The door courtesy switch 7 for detecting the open / closed state of the door is provided for each door.
It is connected to an input terminal P2 of the control device 1 via an input circuit 8 (in the figure, a door courtesy switch 7 corresponding to one door is shown as a representative).

A trunk courtesy switch 9 (hereinafter abbreviated as T courtesy switch) and an engine hood courtesy switch 10 (hereinafter abbreviated as EF courtesy switch) are provided so as to detect open / close states of a trunk and an engine hood (not shown), respectively. The output terminal is connected to the input terminals P3 and P4 of the control device 1 through the input circuit 8.

The intrusion sensor 11 arranged in the vehicle interior outputs a detection signal when an object invading the vehicle interior is detected, and is composed of, for example, an infrared pyroelectric sensor or an ultrasonic sensor. The signal output terminal of the intrusion sensor 11 is an input terminal P of the control device 1 via the input circuit 11a.
Connected to 5.

The indicator 12 is a display lamp arranged in the instrument panel of the driver's seat, and receives a drive signal from the output terminal Q2 of the controller 1 via the drive circuit 12a.
In response to this, a lighting operation is performed and a display operation is performed as described later.

The position lamp 13 and the tail lamp 14 which are turned on at night or in the dusk also function as an alarm means, and control signals are output from the output terminals Q3 and Q4 of the control device 1 via the drive circuits 13a and 14a. When given, the lighting operation is performed accordingly. Further, the horn 15 also has a function as an alarm means, and when the control signal is given from the output terminal Q5 of the control device 1 via the drive circuit 15a, the horn 15 sounds.

EEPROM as nonvolatile storage means
(Electrically writable and erasable ROM) 16
The input / output bus line is connected to the control device 1, and as will be described later, the control device 1 sets the stolen mode flag F to "1" when the alarm operation is executed, as will be described later. It is set and written, and is used as data for reading the value of the theft mode flag F when the entire system starts up when the power is turned on and determining whether or not the state being executed when the power is turned off was the theft mode routine. There is. The constant voltage circuit 17 supplies a power supply voltage (for example, 12 V) from a vehicle-mounted battery 18 as a power source to a predetermined voltage (for example, 5 V) so as to supply a predetermined voltage to each unit described above.
V) VD is converted and output.

Next, the operation of this embodiment will be described with reference to the program flow charts shown in FIGS. When the power supply voltage VD is applied from the vehicle-mounted battery 18 through the constant voltage circuit 17, the control device 1 starts the security program shown in FIG. 2, and step S1
At first, the value of the theft mode flag F stored in the EEPROM 16 is read to determine whether it is "1". When the program is executed for the first time, the value of the theft mode flag F is cleared to "0", so the control device 1 determines "NO" here and proceeds to step S2.

The control unit 1 executes the vehicle stop mode routine in step S2. In this vehicle stop mode routine, the control device 1 uses the remote key 2
If a lock signal or an unlock signal from the device is received and no signal is input, only step S3 is performed. Here, since the condition for shifting to the warning mode routine is not satisfied, it is determined to be "NO". Returning to the vehicle stop mode routine of step S2, steps S2 and S3 are repeatedly executed.

Then, in the vehicle stop mode routine S2, when the unlock key is transmitted from the remote key 2, the control unit 1 gives an unlock signal to the door lock mechanism 6 to cause the door lock mechanism 6 to perform an unlocking operation, and thereafter, a warning is issued. Since the condition for shifting to the mode routine is not satisfied, the process returns to the vehicle stop mode routine S2 through step S3, and steps S2 and S3 are repeatedly executed.

In the stop mode routine S2, when the lock signal is transmitted from the remote key 2, the control device 1 outputs the lock signal to the door lock mechanism 6 on condition that all the doors are closed. The lock operation is performed, and the vehicle stop mode routine S2 is terminated because the condition for shifting to the warning mode routine S4 is satisfied. The control device 1 determines “YES” in step S3 and proceeds to step S4.

In this case, it is assumed that the user gets out of the vehicle, closes all the doors, sends a lock signal from the outside by the remote key 2, and leaves the stopped position of the vehicle. The alert mode is set in order to prevent the vehicle from being stolen by being intruded by a third party.

In the warning mode routine of step S4, the control device 1 operates as the warning mode as follows.
In addition to activating the intrusion sensor 11 and validating the detection signal thereof, the door courtesy switch 7, T
The detection is performed by the courtesy switch 9 and the EH courtesy switch 10, and a blinking display signal is output to the indicator 12 to blink the fact that the warning mode is being executed.

In this alert mode, the controller 1
Means the above-mentioned intrusion sensor 11 and each courtesy switch 7,
When the detection signals from 9 and 10 are not input, when the warning mode routine S4 is ended, steps S5 and S6 are performed.
After that, the process returns to step S4 again, and thereafter, these steps S4 to S6 are repeatedly executed, and the state where the execution of the alert mode is continued.

When an unlock signal is transmitted from the remote key 2 in the execution state of the warning mode routine S4, the control device 1 gives an unlock signal to the door lock mechanism 6 to perform an unlock operation. The setting state of the warning mode will be released. That is, the control device 1 invalidates the detection signal from the intrusion sensor 11 and releases the detection states of the door courtesy switch 7, the T courtesy switch 9, and the EH courtesy switch 10 to establish the condition for transition to the vehicle stop mode routine S2. After the warning mode routine S4 is finished, the step S
5, the process returns to step S2 by determining "YES" here.

On the other hand, in the warning mode routine S4,
When the intrusion sensor 11 detects an unauthorized intruder, or when the door courtesy switch 7, the T courtesy switch 9, or the EH courtesy switch 10 outputs that any one of the door, the trunk, and the engine hood is opened. The control device 1 determines that the illegal intrusion act has occurred, establishes the condition for shifting to the theft mode routine S7, and ends the warning mode routine S4. Then, when the control device 1 subsequently proceeds to step S6 through step S5, it determines "YES" here and shifts to the theft mode routine of step S7.

In the theft mode routine S7,
The control device 1 comes to implement the theft mode according to the flowchart shown in FIG. That is, the control device 1
First, in step T1, it is determined whether or not the theft mode flag F is set to "1", and the value of the theft mode flag F is "0" because this is the first execution.
Since it has been cleared to No., it is determined to be "NO" and the process proceeds to step T2.

Here, the control device 1 has the EEPROM 16
Then, the value of the theft mode flag F is written and stored as "1", and then the process proceeds to step T3.
As a result, the EEP indicates that the theft mode is being executed.
It is stored in the ROM 16, and even if the power is cut off in this state, the stored state is retained in the EEPROM 16.

Now, in step T3, the control device 1 comes to execute a warning operation for a fixed time. In this alarm operation, the control device 1 outputs a blinking drive signal to the position lamp 13 and the tail lamp 14 to cause the blinking operation, and gives an intermittent drive signal to the horn 15 to intermittently ring. Thus, it becomes possible to alert the surroundings and restrain the intruder against an intruder.

After starting the alarming operation at step T4, the control device 1 temporarily terminates the theft mode routine S7 through step T4, and again executes the theft mode routine S7 through step S8. During this time,
When the unlock signal is transmitted from the remote key 2, it is determined to be "YES" in step T4, and step T4 is executed.
5 to T8 will be executed.

That is, the control device 1 stops the alarm operation at step T5, gives an unlock signal to the door lock mechanism 6 at step T6 to perform the unlock operation, and at the subsequent step T7, the theft mode flag is stored in the EEPROM 16. The value of F is rewritten to be "0", and at step T8, the condition for shifting to the vehicle stop mode routine S2 is satisfied and the theft mode routine S7 is ended. Then, in step S8, the control device 1 causes the "YE
Then, the process proceeds to the vehicle stop mode routine S2, and is executed in the same manner as described above.

Now, during execution of the theft mode routine S7 described above, it is assumed that an intruder temporarily cuts off the power. This is a fraudulent act, in which the engine hood is opened while the warning mode is being executed and the power is temporarily cut off immediately to interrupt the execution of the security program and return it to its initial state, canceling the execution of the theft mode routine. It is something to try.

However, even if the power is temporarily cut off as described above, as described above, the warning mode routine S
In step T2 of step 7, the execution state is stored by setting the theft mode flag F to "1" and writing it in the EEPROM 16, so that the control device 1 immediately after power is restored in step S1. If YES is determined, the process immediately shifts to step S7 of the theft mode routine, where the alarm operation is executed at step T3.

Therefore, in such a case,
Immediately after the power is restored and the security program is started, the control device 1 immediately starts an alarm action against the intruder's intention, so that a fraudulent act against the intruder is restrained and abandoned. Will be able to.

According to the present embodiment as described above, the EEPROM 16 is provided as a non-volatile storage means, and the controller 1 writes the value of the theft mode flag F as "1" at the time of execution of the theft mode routine S7. And at the time of implementing the security program, step S
Since the determination is made based on the storage state of the EEPROM 16 in 1, the execution of the alarm operation is stored in the EEPROM 16 immediately after the power is restored even if the power is shut off during execution of the alarm operation. In this case, it is possible to immediately shift to the theft mode routine S7 and execute an alarm operation, and it is possible to make an intruder give up an illegal intruding action, and the antitheft effect is improved.

In the above embodiment, the EEPROM 16 is used as the non-volatile storage means.
Not limited to this, a memory backed up by a battery or the like may be used, or a latch mechanism that mechanically stores the execution of the alarm operation may be used.

Further, in the above embodiment, the configuration in which the position lamp 13, the tail lamp 14 and the horn 15 are used as the alarm means has been described, but the present invention is not limited to this, and the alarm is issued by, for example, blinking the head lamp. It can be used as a means, or a dedicated alarm means can be provided.

In the above embodiment, the present invention has been described in the case of the configuration using the security program for shifting between the routines of the vehicle stop mode, the warning mode and the theft mode, but the present invention is not limited to this. It can also be applied to the case of a configuration using a security program having.

[0043]

As described above, according to the vehicle anti-theft device of the present invention, the nonvolatile memory means for storing the alarm operation when the alarm operation is carried out is provided, and the power is turned on by the control means. Since it is configured to execute the alarm operation immediately after the execution of the alarm operation is stored in the storage means, even if the power is cut off during execution of the alarm operation, the alarm is issued immediately after the power is restored. Since the operation will be executed again, it is possible to abandon the intrusion act,
It has an excellent effect that the antitheft effect is improved.

[Brief description of drawings]

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

[Figure 2] Security program flowchart

FIG. 3 is a flowchart of a theft mode routine.

[Explanation of symbols]

1 is a control device (control means), 2 is a remote key (portable transmitter), 3 is a lock switch, 4 is an unlock switch, 5 is a receiver, 6 is a door lock mechanism, 7 is a door courtesy switch, and 9 is a trunk. Courtesy switch, 10 engine hood courtesy switch, 11 intrusion sensor,
Reference numeral 12 is an indicator, 13 is a position lamp (warning means), 14 is a tail lamp (warning means), 15 is a horn (warning means), 16 is an EEPROM (nonvolatile storage means), 17 is a constant voltage circuit, and 18 is a vehicle battery. (Power supply)
Is.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Mizuno No. 1 Noda, Toyoda, Oguchi-cho, Niwa-gun, Aichi Prefecture Tokai Rika Electric Co., Ltd.

Claims (1)

[Claims] 1. When a door lock signal is transmitted from a portable transmitter when the door is closed while the vehicle is stopped, the door lock mechanism is caused to perform a lock operation and a warning mode state is set to detect an unauthorized intruder. In a vehicle anti-theft device having a control means for performing an alarm operation by an alarm means, a non-volatile storage means for storing the alarm operation when the alarm operation is performed is provided, and the control means is provided immediately after power is turned on. The anti-theft device for a vehicle according to claim 1, wherein the alarm operation is executed when the execution of the alarm operation is stored in the storage means.