The invention discloses a dual-technology
detector based on temperature bidirectional compensation, comprising a PIR sensor, a
microwave sensor, a PIR amplification circuit, a
microwave amplificationcircuit, a temperature conversion circuit, a single-
chip microcomputer processing unit and an alarm output circuit. The dual-technology
detector based on temperature bidirectional compensation comprises the following steps of: receiving analog
voltage signals transmitted from the PIR amplification circuit through the single-
chip microcomputer processing unit, and monitoring whether the
voltage exceeds a PIR
threshold voltage or not; receiving analog
voltage signals transmitted from the
microwave amplification circuit, and monitoring whether the voltage exceeds a microwave
threshold voltage ornot; collecting the voltage of the temperature conversion circuit in real time, and performing real-time compensation of the PIR
threshold voltage and the microwave threshold voltage according to thetemperature condition; and finally, comprehensively judging the PIR
analog signal and the microwave
signal, and determining whether to generate an alarm output according to the PIR threshold voltage and the microwave threshold voltage condition after temperature compensation. The dual-technology
detector can maintain the proper sensitivity without the conditions that the sensitivity is high at lowtemperatures and is low at high temperatures due to temperature changes.