Vehicle burglar alarm sensing head and signal processing method thereof

Abstract

The invention relates to the technical field of burglar alarms, in particular to a vehicle burglar alarm sensing head for preventing vehicles from being stolen and a signal processing method thereof. The vehicle burglar alarm sensing head comprises an electromagnetic vibration sensing head, a signal conditioning and filtering unit and an integrated circuit, wherein the electromagnetic vibration sensing head is electrically connected with the signal conditioning and filtering unit; the characteristic analysis of a signal output by the signal conditioning and filtering unit is carried out by the integrated circuit through a digital processing method so as to distinguish stolen behavior from general interference vibration; the integrated circuit is connected with the signal conditioning and filtering unit, and is input and output to a host computer; the integrated circuit carries out filteration and variance calculation according to a collected sample and is then compared with a threshold, thereby an alarming signal is judged so as to determine whether to be triggered for alarming. The invention can effectively solve the problem of false alarm of the burglar alarm and can be widely applied in vehicle burglar alarms.

Description

technical field [0001] The invention relates to the technical field of anti-theft devices, in particular to a sensor head of a vehicle anti-theft device for preventing vehicle theft and a signal processing method thereof. Background technique [0002] With the development of the economy, more and more vehicles have entered people's work and life, and the problems of vehicle safety and anti-theft have become increasingly prominent. For this reason, the anti-theft alarm that is installed on the vehicle is arranged to occur, and when vibration occurred around the vehicle, the alarm sent the alarm sound. The structure of the traditional vehicle anti-theft alarm is shown in the attached figure 1 As shown, the alarm is composed of sensor head 1, host 2 and speaker 3; the structure of sensor head 1 is shown in the attached figure 2 As shown, the electromagnetic vibration sensing head 11 is transmitted to the signal conditioning filter unit 12 according to the vibration generatio...

AI Technical Summary

Problems solved by technology

The structure of the traditional vehicle anti-theft alarm is shown in the attached figure 1 As shown, the alarm is composed of sensor head 1, host 2 and speaker 3; the structure of sensor head 1 is shown in the attached figure 2 As shown, the electromagnetic vibration sensing head 11 is transmitted to the signal conditioning filter unit 12 according to the vibration generation signal; then the alarm signal is input into the host computer 2 after the voltage comparison is carried out by the voltage comparator 13; therefore, it can be seen from the above structure diagram: the existing The alarm signal input by the sensor head 1 is simply processed by the voltage comparator 13 of the analog circuit and then input to the host, resulting in a high rate of false alarms

In the case of large vehicles passing by, setting off firecrackers, etc., the alarm may be triggered, and the false alarm rate is particularly high; thus causing the vehicle anti-theft alarm to disturb the people

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