JPH0634195Y2 - In-vehicle security device - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> The present invention relates to a vehicle-mounted security device, and in particular, even if the battery line is disconnected during an alarm, the alarm can be re-output by reconnecting the battery line. The present invention relates to an in-vehicle security device.

<Prior art> An anti-theft device (security device) that prevents a vehicle from being stolen is designed to steal the vehicle while security is activated by someone else opening the door of the vehicle, giving the vehicle considerable vibration or shock, or opening the trunk. Or, if it enters the car, it will be in an alarm state, sound the siren, or blink the headlight of the car,
Prevent theft by starting the engine (to prevent the engine from running) or cutting the fuel to prevent the car from running.

<Problems to be Solved by the Invention> In the conventional vehicle-mounted security device, an alarm is generated when an abnormality is detected during the security operation as described above. However, if the battery line is disconnected while the alarm is being generated, the alarm will not be regenerated even if the battery line is reconnected. For this reason, in the conventional in-vehicle security device, if the thief disconnects the battery line once to steal the car, no alarm is generated even if the battery line is reconnected, and therefore the alarm generation time is shortened and the car is stolen strongly. There was a problem that could not be prevented.

In view of the above, an object of the present invention is to provide a vehicle-mounted security device capable of outputting an alarm again when the battery line is disconnected after the occurrence of an abnormality and then reconnected.

<Means for Solving the Problem> According to the present invention, the above-mentioned problem is solved by means for detecting the fall and rise of the battery voltage in the battery line and the battery voltage fall when an alarm is output due to the occurrence of an abnormality. Rewritable RO that remembers
M and the alarm control means for referring to the stored contents of the ROM after detecting the rise of the battery voltage and outputting an alarm when the fall information of the battery voltage during the alarm occurrence is stored in the ROM. It

<Operation> An alarm is output when an abnormality is detected during security operation, and the detection of the abnormality is stored in a rewritable ROM (EEP-ROM). The battery line is disconnected and the alarm is stopped. However, after that, the rising of the battery voltage is monitored, it is judged that the battery line disconnected due to the rising of the battery voltage is reconnected, the contents stored in the EEP-ROM are referred to, and if the abnormality occurrence is stored, Regenerates the alarm.

<Embodiment> FIG. 1 is a block diagram of a security device according to the present invention. Reference numeral 1 denotes a portable transmission unit (remote control unit), which can transmit a security operation command or an operation stop command to a vehicle-mounted security device main body by pressing a key. That is, when a security operation start or operation stop is requested by operating an operation start key or an operation stop key (not shown), the microcomputer incorporated in the remote control unit 1 responds to the operation start or operation stop together with the ID code stored in the code ROM. The command code is generated and sent from the antenna ANT to the security device body.

2 is a main body of the security device, 21 is an antenna, 22 is a receiving unit for receiving and demodulating a signal transmitted from the remote control unit 1, 23 is an in-vehicle security operation panel provided with various keys, and 24 is an ID code It is a rewritable ROM for storing the data Fa indicating the occurrence of an abnormality,
For example, EEP-ROM, 25 is a voltage rise / fall detector that detects the rise and fall of the voltage in the battery line BTL, and 26 is a security controller having a microcomputer configuration.

The security operation panel 23 is provided with a ten key 23a, a set key 23b for requesting a security operation, a code key 23c operated when an ID code or the like is input.

The security control unit 26 receives the signal transmitted from the remote control unit 1, and the ID code included in the received signal is EE.
It judges whether it matches with its own ID code stored in P-ROM 24.If it does not match, the received signal is ignored, and if it matches, security is performed according to the command code sent with the ID code. Performs operation start or operation stop control. Further, the security control unit 26 performs alarm generation control, which will be described later, when a sensor detects an abnormality such as a door opening, a trunk opening, or vibration occurrence during the operation of security.

Reference numeral 3 denotes a detection unit that detects door opening / closing, trunk opening / closing, vibration, etc., and includes a door opening / closing sensor 31, a trunk opening / closing sensor 3
2, a vibration sensor 33, an ignition sensor 34, etc. are provided.

Reference numeral 4 denotes an anti-theft unit (alarm generating unit), which uses a siren drive signal SDR output from the security control unit 26 when an anomaly is detected by a sensor during security operation, and a siren driver 41 that blinks and a flashing drive signal BLD. Light driver 4 that flashes the headlight by
Have two.

Reference numeral 5 denotes an engine control unit, which is used when an abnormality is detected by each sensor during security operation.
The signal ESP output from 26 performs engine start cut or fuel cut to prohibit engine start.

6 is an automobile battery, battery line BTL
The battery voltage is input to the security device main body 2, the detection unit 3, the alarm generation unit 4, and the engine control unit 5 via the.

FIG. 2 is a flow chart of the alarm generation control processing of the security control unit 26, and the overall operation of FIG. 1 will be described below with reference to this flow chart.

When the security is activated, it is monitored whether an abnormality has occurred (step 101). When the abnormality occurs, the abnormality occurrence flag Fa is set to "1" and stored in the EEP-ROM 24 (step 102). , An alarm such as blinking of the headlight is generated, and the engine control unit 5 is prohibited from starting the engine (step 103).

Then, it is checked whether the security operation stop is instructed from the remote control unit 1 or the security operation panel 23 (step 104). If the security operation stop is instructed, the abnormality occurrence flag Fa is set to "0" and stored in the EEP-ROM 24. At the same time (step 105), the alarm generation is terminated (step 106), and the system is brought into the security inoperative state (step 107).

On the other hand, if it is not instructed to stop the security operation in step 104, the output of the voltage rise / fall detection unit 25 is referred to, whether the voltage of the battery line BTL has dropped, in other words, whether the battery line BTL has been disconnected. Check (step 108).

If the battery line BTL is not disconnected, the process jumps to step 103 to continue the alarm generation and repeat the subsequent processes.

However, if the battery line BTL is disconnected, the alarm is interrupted due to the power supply interruption (step 10
9).

In this case, the abnormality occurrence flag Fa (= “1”) is held in the EEP-ROM 24. Then, Fa = "1" indicates that the battery voltage has fallen during the alarm output.

After that, when the battery line BTL is reconnected, the security control unit 26 detects the reconnection by referring to the output of the voltage rise / fall detection unit 25 (step 110), and the abnormality occurs due to the detection of the reconnection. It is checked whether the flag Fa is "1" (step 111).

If the abnormality occurrence flag Fa is "1", jump to step 103,
The alarm generation unit 4 is caused to generate an alarm such as siren or blinking of a headlight, and the engine control unit 5 is prohibited to start the engine, and the subsequent processing is executed.

On the other hand, if Fa = “0” in step 111, the security is deactivated and no alarm is generated (step 112).

<Advantages of Device> As described above, according to the present invention, a rewritable ROM that stores the occurrence of an abnormality during security operation, a means for detecting the rise of the battery voltage in the battery line, and Since the security device is equipped with alarm control means that refers to the stored contents and outputs an alarm when an abnormality is stored, even if the battery line is disconnected after the abnormality occurs and the alarm is stopped, the battery The alarm can be regenerated by reconnecting the line, and it is possible to strongly prevent car theft

[Brief description of drawings]

FIG. 1 is a block diagram of an in-vehicle security device according to the present invention, and FIG. 2 is a flow chart of alarm generation control processing of the present invention. 1 …… Remote control unit 2 …… Security device main body 23 …… Security operation panel, 24 …… EEP-ROM 25 …… Voltage rise / fall detection unit 26 …… Security control unit, 4 …… Alarm generation unit

Claims (1)

[Scope of utility model registration request] 1. An in-vehicle security device that outputs an alarm when an abnormality such as vibration or door opening occurs during security operation, a means for detecting falling or rising of a battery voltage in a battery line, and an alarm due to the occurrence of the abnormality. A rewritable ROM that remembers that the battery voltage has dropped when outputting
And an alarm control unit for referring to the stored contents of the ROM after detecting the rise of the battery voltage and outputting an alarm when the fall information of the battery voltage during the alarm occurrence is stored in the ROM. In-vehicle security device.