JPS62295752A - Burglar alarm control device for automobile - Google Patents

Abstract

PURPOSE:To ensure burglar prevention 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 for impact detection to be changed in accordance with daytime or nighttime, and places more crowded or less crowded with people at the set time. 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, No.1 time setting device 26 which sets the time for either day or night, and No.2 time setting device 26 which sets the time for control initiation, are provided. Outputs from these time setting devices 26 and 26' are inputted into an operating section 25 for inputting the output on time from the operating section 25 into a time setting memory 22 so as to compare 36 its output with the output from a time adder 20, thereby actuating a sensitivity setting memory 21. And an alarm output level setting memory 24 is provided for comparing 23 its output with the output from the operating section 25 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 vibrations generated when a parked car breaks a door, window glass, trunk lid, etc. The present invention relates to a theft alarm control device for an automobile that is designed to operate more efficiently.

Conventional Technology In order to prevent car doors and windows from being destroyed and interior decorations and other items stolen, shock sensors are used to detect the vibrations that occur when vandalizing doors and windows. There is an automobile alarm system which detects the noise and uses the detection means to operate the horn and issue an alarm. For example, Japanese Patent Publication No. 54-13159 has been published as a publication. In this patented invention, the sensitivity of the alarm state can be adjusted by manual operation as appropriate.

Problems to be Solved by the Invention I: Therefore, if you manually operate the 16-degree adjustment knob to increase the sensitivity in order to raise the sensitivity of the alarm, for example, in a place where there are many passersby, such as during the daytime. Even when the purpose of theft is not intended, such as when the vehicle is parked in a parking lot, even a slight physical contact can set off the alarm, 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. Not only is the system unable to prevent theft, but the alarm is activated from the moment the driver removes the key from the steering lock and closes the door, so even if it is not the time or place where theft prevention is necessary,
There are disadvantages such as wasteful consumption of electricity.

Means for Solving the Problems (Objective of the Invention) In order to eliminate such drawbacks, the driver himself/herself can control the alarm state during daytime and nighttime without operating the sensitivity adjustment knob. A sensitivity setting memory, a first time setting device capable of setting time on either the day or night side, and a timer setting memory inputting an output signal of the first time setting device are provided, and a timer setting memory is provided to input an output signal of the first time setting device, and a signal is generated at a predetermined time from the first time setting device. The output signal is applied to the timer setting memory to automatically control the operating state of the shock during daytime and nighttime, and by providing a second time setting device, the time at which the control occurs can be set appropriately. It's about doing.

Before the driver gets out of the car, he or she operates the knob on the sensitivity adjustment device that adjusts the sensitivity of the impact sensor to prepare for the alarm, and the impact sensor detects the vibrations that occur when the vehicle is vandalized. The output amplified by this amplification circuit (ζ) is applied to an input circuit for detecting the closed state of the door, etc., and is outputted from a power converter.

The output from this transducer is applied to a preset sensitivity setting memory 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.

In addition, the output from the transmitting circuit that occurs when the door is closed and the set time of the second time setting device starts 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. The output of this timer comparator is input to the calculation section.

In such an alarm preparation state, by operating a 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 a.m., this time is processed by the calculation section, and the output from this calculation section is input to 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 step 11 completes the alarm preparation state at night.

If an act of vandalism occurs on the car in such a warning preparation 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 1. The output of the sensitivity setting memory and the output from the impact sensor are processed by the calculation section. The output signal processed by the calculation unit in this way is compared with the output signal of the alarm output level setting memory using a comparator, and the output from the calculation unit is higher than the output of the alarm output level setting memory. If the switching circuit is closed, an output to the f″l-alarm is generated.

Example An embodiment of the present invention will be described below with reference to the drawings.

The automobile theft alarm control device installed on the driver's seat side of the automobile is controlled by a microcomputer 3.1, and the microcomputer 34 includes a sensitivity setting memory 21 in which impact sensitivity is preset, and a sensitivity setting memory 21 in which impact sensitivity is preset. A calculation unit 25 connected to the sensitivity setting memory 21 and a sacrificial device 3
It is connected to the alarm output level setting memory 24 in which the standard for generating the first report of 7 is set, and to the converter 32 and the switching circuit 35, and inputs the output from the arithmetic unit 25 and the alarm output level setting memory 24. Comparator 2
3, a timer setting memory 22 that sets the alarm preparation state from the time the door is closed, a timer adder 20 that similarly inputs the output from the transmitting circuit 28 generated from setting the alarm preparation state, and this timer. Addition @20
and a timer comparator 36 that inputs the output of the timer setting memory 22. This timer comparator 3
The output from 6 is input to the calculation unit 25, and the first time setting device 26 is operated to set a desired time.
For example, a time output from a calculation unit 25 that receives an output signal generated by operating a pushbutton switch is input to a timer setting memory 22.

An amplifier circuit 3o inputs the output of a sensitivity adjustment device 19 provided with an impact sensor 10 and a legitimate child (not shown) connected to the terminals (not shown) of the microcomputer 3.1, and detects the closed state of the door. a converter 32 that inputs the output of this input circuit 31, a reset circuit 33 connected to the input circuit 31, a power supply control circuit 29 connected to the input circuit 31 and the amplifier circuit 30, and a converter 32 that inputs the output of this input circuit 31; Transmission circuit 2 connected to the power supply control circuit 29 and generated when the door is closed
8 and a first time setting device 26 operated by the driver to set a desired time, and a switching circuit 35 that applies an output from such a microcomputer 34; and an alarm device 37 connected to the microcomputer 34. Further, a second time setting device 26' is connected between the power supply control circuit 29 and the transmitting circuit 28, and this second time setting device 26' is connected to the calculation section 25. 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 is provided with a sensitivity setting memory, a first time setting device, and a second time setting device, and changes the output of the sensitivity setting memory when the time is started, so that the output of the sensitivity setting memory is changed during the daytime and nighttime, or when there are many people. Since the degree of impact can be automatically set according to the time depending on the location, it is possible to prevent malfunctions caused by light impact, and it is also possible to obtain a variable alarm means. Since the alarm preparation state is configured such that the time can be set by the second time setting device, it is possible to prevent wastage of the battery.

[Brief explanation of drawings]

The figure is a professional diagram of one embodiment of the present invention, and represents a system diagram of input and output. 10... Shock sensor, 19... Sensitivity adjustment device, 2
1... Sensitivity setting memory, 22... Timer setting memo 'J-123... Comparator, 24... Alarm output level setting memory, 25... Arithmetic unit, 26... First time setting Device, 26'...Second time setting device, 34
...Microcomputer-135...Switching circuit, 36...Timer comparator, 37...Alarm.

Claims (1)

[Claims] In a car theft alarm control device that is equipped with a shock sensor that detects vibrations of the car and is configured to generate an alarm by the shock sensor, a first time setting device and a second time setting device are installed in a microcomputer that enables an alarm preparation state. A calculating section to which the device is connected, inputting the outputs of the first time setting device and the second time setting device and generating a time output, a timer setting memory inputting the time output from the calculating section, and a timer addition. a timer comparator that compares the output of the timer adding machine and the timer setting memory;
A sensitivity setting memory that generates an output when the output from this timer comparator is input to the calculation section, an alarm output level setting memory, and a comparator that compares the output from this alarm output level setting memory and the calculation section. A switching circuit that inputs the output of the microcomputer and an alarm device connected to this switching circuit are provided, and the operating time of the microcomputer in the alarm preparation state can be set by a time setting device, and this time can be set. An automobile theft alarm control device characterized by changing the output of a sensitivity setting memory depending on the time.