JPS62295751A - Burglar alarm control device for automobile - Google Patents

Abstract

PURPOSE:To improve burglar preventive performance where alarm bells are sounded over based on the output from an impact sensor detecting vibration caused by destructive actions against an automobile by enabling sensitivity against impact detection to be changed in accordance with day-time, night-time, more crowded places, less crowded places and the like. CONSTITUTION:Where an alarm unit 37 is actuated upon detecting destructive (burglar) actions against an automobile by a microcomputer 34 based on the output from an impact sensor 10, a time setting device 26 which sets the time for either day or night, is provided. The output from said time setting device 26 is inputted into an operating section 25 for inputting the output on the time from the operating section 25 into a timer setting memory 22 whereby its output is compared with the output from the timer adder 20 by a comparator 36, thereby actuating a sensitivity setting memory 21. And an alarm output level setting memory 24 is provided for comparing its output with the output from the operating section 25 by a comparator 23 so as to control a switching circuit 35, thereby actuating the alarm unit 37.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention Industrial Application Field The present invention detects the vibration that occurs when a parked car breaks a door, window glass, trunk lid, etc. This invention relates to an automobile theft alarm control device in which a good alarm is activated.

Conventional Technology In order to prevent the doors and windows of a car from being destroyed and the decorations and other items inside the car and the interior of the car being stolen, a shock sensor device is used to detect the vibrations generated when the doors and windows are vandalized. There is an automobile alarm system which detects the noise and uses this detection means to operate a horn and issue an alarm. If this patented invention dies,
Sensitivity can be adjusted manually according to the alarm status.

Problems to be Solved by the Invention Therefore, if you manually operate the sensitivity adjustment knob to increase the sensitivity in order to improve the sensitivity of generating the alarm, for example, when parking in a place with many passersby during the day, etc. Even if the intention is not to steal, even a light physical contact can cause an alarm to be activated, which can cause trouble for the driver. Therefore, if the driver keeps the sensitivity of the shock sensor lowered so that it does not react to weak vibrations, the operating level of this shock sensor will decrease, and theft will occur at night when there are fewer people on the road. The disadvantage is that it cannot be prevented.

Means to Solve the Problems The object of the present invention is to eliminate such drawbacks, and to provide a single sensitivity setting in order to control the alarm state during daytime and nighttime without the driver himself operating the sensitivity adjustment knob. A time setting device that can set the time for day or night rotation, and a timer setting memory that inputs the output signal of this time setting device are provided, and the output signal generated from the time setting device at a predetermined time is stored in the timer setting memory. The purpose of the present invention is to automatically control the operating state of the shock during daytime and nighttime by applying the shock to the shock absorber.

Before the driver gets out of the car, if the driver turns the knob on the sensitivity adjustment device that adjusts the sensitivity of the impact sensor to prepare for the alarm, the impact sensor will be able to capture images that occur when vandalizing a car. The output amplified by this amplifier circuit is applied to an input circuit that detects the closed state of the door, etc., and is output to the υ0 converter.

The output from this A/D converter is applied to a sensitivity setting memory that is preset to control daytime and nighttime alarms. This sensitivity setting memory is stored in memory by the driver operating a knob provided on the sensitivity setting device in advance.

Also, the output from the transmitting circuit that occurs when the door is closed and the alarm preparation state is on is input to the timer adder, and the timer setting memory that is generated from the alarm preparation state is input to the timer comparator. be done. The output of this timer comparator is input to the calculation section. In such an alarm preparation state, by operating the push button switch provided on the time setting device to set the desired time,
The output from the time setting device is input to the calculation section and the time is generated. This output signal is input to the timer setting memory.

Further, this timer setting memory and the output of the timer adder are compared by a timer comparator, and at the same time, this output is input to the calculation section.

For example, if the driver's desired time is 7:00 p.m., this 7:00 p.m. time is processed by the calculation section, the output from this calculation section is input to the timer setting memory, and the time is stored in the timer setting memory. The output from the timer adder is compared by a comparator, and the output from this comparator is input to the calculation section. This completes the alarm preparation state at night.

If an act of vandalism occurs on the car while the alarm is in the ready state, the vibration at this time will be detected by the impact sensor, and this detection output will be input to the calculation unit, so the output of the sensitivity setting memory and the impact sensor will be detected. The output from the is processed by the arithmetic unit. The output signal processed by the calculation unit in this way is compared with the output signal of the alarm output level setting memory in a comparator, and if the output from the calculation unit is higher than the output of the alarm output level setting memory, switching is performed. The circuit is closed and an output is generated to the alarm.

Example Hereinafter, one embodiment of the present invention will be explained based on sections.

The automobile theft alarm control device installed on the driver's seat side of the automobile is controlled by a microcomputer 34, which includes a sensitivity setting memory 21 in which shock sensitivity is preset, and a sensitivity setting memory 21 in which impact sensitivity is preset. An arithmetic unit 25 connected to the memory 21, an alarm output level setting memory 24 that sets the standard for generating an alarm from the alarm device 37, a 1.9-inch converter 32, and a switch circuit 3.
A comparator 23 is connected to the comparator 25 and inputs the output from the arithmetic unit 25 and the alarm output level setting memory 24, and a timer setting memory 22 is connected to the alarm output level setting memory 22 to set the alarm preparation state from when the door is closed. It incorporates a timer adder 20 that inputs the output from the transmission circuit 2A28 generated from the set of states, and a timer comparator 36 that inputs the outputs of this timer adder 20 and the timer setting memory 22. The output from the timer comparator 36 is input to the calculation section 25, and a desired time is set.

The time output from the arithmetic unit 25 that receives an output signal generated by the operation of a time setting device 26, such as a push button switch, is input to the timer setting memory 22.

An amplifier circuit 30 that receives the output of the sensitivity adjustment device 19 provided with the impact sensor 10 and the illegitimate child (not shown) connected to a terminal (not shown) of the microcomputer 34, and an input that detects the closed state of the door. circuit 31 and this input circuit 3
A/I) converter 32 that inputs the output of 1, and input circuit 3
1, a power supply control circuit 29 connected to the input circuit 31 and the amplifier circuit 30, and a transmission circuit 28 connected to the power supply control circuit 29 which generates a signal when the door is closed. A switching circuit 35 to which the output from the microcomputer 34 is applied is connected to the time setting device 26 operated to set the time, and an alarm 37 connected to the switching circuit 35. Connect to microcomputer 34. 38 is a door switch that opens and closes when the door opens and closes.

Effects of the Invention As described above, the present invention includes a sensitivity setting memory and a time setting device, and changes the output of the sensitivity setting memory when starting the time, depending on daytime and nighttime, or places with many people and places with few people. Since it is possible to automatically set the degree of impact as appropriate based on the time, it is possible to prevent malfunctions caused by light impacts, and it is also possible to provide a variable alarm means. .

[Brief explanation of the drawing]

The figure is a block diagram of an embodiment of the present invention, and shows a system diagram of input and output. lO...Impact sensor, 19...Sensitivity adjustment device, 2
1...Sensitivity setting memory, 23...Comparator, 24.
... Alarm output level setting memory, 25 ... Arithmetic unit, 26 ... Time setting device, 34 ... Microcomputer -135 ... Switching circuit, 36 ... Timer comparator, 37 ... Alarm device , 38...door switch.

Claims (1)

[Claims] In a car theft alarm control device that is equipped with a shock sensor that detects vibrations of the car and uses this shock sensor to generate an alarm, a time setting device is connected to a microcomputer that enables the alarm preparation state, and the time setting device is connected to the microcomputer that enables the alarm preparation state. A calculation unit that inputs input/exit of the device and generates a time output, a timer setting memory that inputs the time output from this calculation unit, a timer adder, and a comparison between the outputs of the timer adder and the timer setting memory. A timer comparator, a sensitivity setting memory that generates an output when the output from the timer comparator is input to the calculation section, an alarm output level setting memory, and an output from the alarm output level setting memory and the calculation section. A comparator to compare,
a switching circuit that inputs the output from this comparator;
An alarm connected to this switching circuit is provided, and the operating time of the microcomputer in the alarm preparation state can be set using a time setting device, and the output of the sensitivity setting memory is changed from when this time is set. An automobile theft alarm control device characterized in that: