JPS62295753A - Burglar alarm control device for automobile - Google Patents

Abstract

PURPOSE:To set an alarm preparation condition only when burglar prevention is required so as to save electricity where alarm bells are sounded over based on the output from an impact sensor detecting vibration caused by destructive actions against an automobile by connecting a time setting device between a power source control circuit and a transmitting circuit. CONSTITUTION:Where an alarm unit 37 is actuated upon detecting destructive actions against an automobile by a microcomputer 34 based on the output from an impact sensor 10, a time setting device 26 which sets an alarm condition or an alarm preparation condition at the time required, is provided. Said time setting device 26 is connected between a power source control circuit 29 connected to the microcomputer 34 and a transmitting circuit 28. Then, the transmitting circuit 28 is actuated at the time set by the time setting device 26 for driving the microcomputer 34. The microcomputer 34 is constituted to actuate the alarm unit 37 when impact obtained from the output from the impact sensor 10 is judged to be equal to or more than a predetermined value by a comparator 23.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention Industrial Application Field The present invention detects the vibration generated when the door, window glass, door/clid, etc. of a parked car is broken. This vibration relates to an automobile theft alarm control device that activates the 2005 alarm.

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 vibration sensor device is used to detect the vibrations that occur when vandalizing the doors and windows. There is an automobile alarm device which detects the above-mentioned conditions and activates an alarm by this detection means to issue an alarm.

In this patented invention, the sensitivity of the alarm state can be adjusted manually as appropriate.

Further, the alarm preparation state occurs when the driver gets out of the car and closes the door.

Problems to be Solved by the Invention In automobiles equipped with an alarm system, it is possible to prepare for an alarm by detecting the opening/closing of the ignition switch operated by the key and the closing state of the door. When someone takes away the keys, the alarm is already ready, so if you are in a place where there is a lot of foot traffic or where it is difficult for the car to be stolen, you may want to activate the alarm. Although there is no need to set the alarm preparation state, the key is removed from the ignition, so the alarm preparation state is entered, and there is a disadvantage that electricity is wasted.

Means for Solving the Problems The purpose of the present invention is to eliminate the above drawbacks by making it possible to appropriately select the time when the alarm preparation state occurs depending on the time zone and place where theft is unlikely.

Operation When the driver gets out of the car and is in the alarm ready state, when the shock sensor detects vibrations caused by vandalism of the car, this detection output is amplified by the amplifier circuit, and this output is used to detect when the door is in the closed state. The signal is input to an input circuit connected to a door switch that detects the signal, and is output to an A/D converter. Therefore, the output from the converter is 1. The signal is input to an arithmetic unit built into the microcomputer, and the output from this arithmetic unit is input to a comparator. This comparator inputs the output of the alarm output level setting memory built into the microcomputer, and compares the output of the A/D converter with this alarm output level setting memory, and the output from this comparator is used for switching. When the switching circuit is closed, the alarm is activated, but in order to set the alarm state or alarm preparation state according to the time, the time setting device must be connected to the power supply control circuit and the transmitter circuit. The output of this time setting device at startup is input to a timer adder built into the microcomputer, and the output of this timer adder is input to a timer comparator. At the same time, the output from the activation of the time setting device is input to the calculation section, and the output from this calculation section becomes the time output and input to the timer setting memory, and then the output from this timer setting memory is input to the timer comparator. is input. The output from this timer comparator is input to a calculation section, and the output of this calculation section is input to the comparator. Therefore, unless the time setting device is activated at the desired time, no activation output will be generated to the alarm.

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

It is controlled by a microcomputer 34 in an automobile theft alarm control device installed on the driver's seat side of the automobile. This microcomputer 34 has a time setting device 2.
6 and the output from the wide converter 32, a comparator 23 connected to the comparator 25, an alarm output level setting memory 24 connected to the comparator 23, and a transmitting circuit. 28, a timer comparator 36 that receives the output from the timer adder 20, and a timer setting memory 22 connected to the comparator 36. The microcomputer 34 also includes a door switch 38 for detecting the closing of the door, an input circuit 31 connected to an amplifier circuit 30 connected to the impact sensor 10, and an input circuit 31 connected to the input circuit 31. a converter 3, a reset circuit 33, a power supply control circuit 29, and a time setting device 26 connected to the power supply control circuit 29 and connected to the transmission circuit 28;
and the transmitting circuit 28 are connected from outside the microcomputer 34, and a switching circuit 35 which inputs the output from the microcomputer 34 and the alarm 37 are connected from the outside.

Effects of the Invention As described above, the present invention provides an automobile theft alarm control device having a vibration sensor, in which a time setting device is connected between a power supply control circuit and a transmitting circuit, and an output from the time setting device is generated at a desired time. Therefore, if the vehicle is parked at a time or place where theft prevention is unnecessary, it will be left defenseless, and if theft prevention is required, the vehicle will be in the alarm ready state. This has the advantageous effect of not causing battery depletion, since this can be done as needed.

[Brief explanation of the drawing]

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, 26... Time setting device, 2
8... Transmission circuit, 29... Power supply control circuit, 34...
・Microcomputer-137...W report! .

Claims (1)

[Claims] An automobile theft alarm control device is equipped with a shock sensor and detects vibrations and generates an alarm when vibrations occur during vandalism of the automobile, which includes a microcomputer control means and a power source connected to the microcomputer. A control circuit and a transmitting circuit are connected, and a time setting device is connected between the power supply control circuit and the transmitting circuit, and when the output of the time setting device is generated during time setting, the output of the transmitting circuit is generated. A theft alarm control device for an automobile, characterized in that the device operates a microcomputer means.