Dual-technology detector based on area anti-pet algorithm and anti-false alarm method thereof

Abstract

The invention discloses a dual-technology detector based on an area anti-pet algorithm and an anti-false alarm method thereof. The dual-technology detector comprises a PIR sensor, a microwave sensor,a PIR amplifying circuit, a microwave amplifying circuit, a single chip processing unit and an alarm output circuit. The single chip processing unit receives an analog voltage signal transmitted fromthe microwave amplifying circuit to calculate the accumulated area of a super microwave threshold value in the specific time of the voltage signal, and receives an analog voltage signal transmitted from the PIR amplifying circuit to calculate the accumulated area of a super PIR threshold value in the specific time of the voltage signal. A singlechip judges the size of the accumulated PIR area SUM_PIR and the accumulated microwave area SUM_MW, calculates the sum of the area of the accumulated PIR area and the accumulated microwave area to determine whether an alarm output is generated. The detection method which is based on the area algorithm and is provided by the invention can reduce false alarm caused by pets without sacrificing product sensitivity.

Description

technical field [0001] The invention relates to the technology in the field of detectors, in particular to a double-detection detector based on an area anti-pet algorithm and a method for preventing false alarms. Background technique [0002] Such as figure 1 As shown, most of the anti-theft alarm detectors currently on the market use the voltage threshold algorithm, that is, set an upper limit voltage V_H and a lower limit voltage V_L, when the voltage S from the microwave or PIR amplifier circuit is higher than the upper limit voltage V_H (as figure 1 T0 time) or lower than the lower limit voltage V_L (such as figure 1 T1 time) will generate an alarm. [0003] Such as figure 2 and image 3 As shown, the voltage threshold algorithm is relatively simple, such as figure 2 Because the kitten and the human are at different distances from the detector, the kitten is closer to the detector, and the human is farther away from the detector. image 3 for kittens and people ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims at the deficiencies in the prior art, and its main purpose is to provide a double-identification detector based on the area anti-pet algorithm and its anti-false alarm method, which is used to solve the problem caused by the intrusion of small and medium-sized pets in the anti-theft alarm detector. false alarms while maintaining the sensitivity of the detector at the far end

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