How to resist the light interference of pyroelectric sensor

Application of anti-interference pyroelectric infrared sensor. /PatentNo.: 200520054273 An anti-interference pyroelectric infrared sensor comprises an infrared filter arranged in front of an inductor made of pyroelectric material, wherein the inductor is connected in series with the grid of a field effect tube, and the drain and source of the field effect tube are led out in series with the ground wire from the other side of the inductor to form three pins of the sensor, and an anti-electromagnetic interference circuit is arranged in the circuit in the sensor. The sensor of the utility model adopts anti-electromagnetic interference elements, which greatly eliminates the influence of electromagnetic interference on the sensing signal and improves the signal-to-noise ratio of the sensor. Date of application: 065438+2005124 October; Announcement date of authorization: May 30, 2006; Applicant/patentee: Zheng Guoen Applicant Address: 72 # 2- 1-202, Nigang North Village, Shenzhen City, Guangdong Province Invention Designer: Zheng Guoen Patent Agency: Zhongyuan Xinda Intellectual Property Agency Co., Ltd. Agent: Wang Yongwen Patent Type: utility model patent pyroelectric infrared sensor is widely used in burglar alarms, automatic doors, induction lamp, wide working temperature range and other advantages, and CS9803 is specially designed. Made by CMOS technology, it has the advantages of high performance index, good consistency, low power consumption, simple peripheral circuit, convenient installation and debugging, and high reliability. It is the equipment with excellent performance and complete functions among similar products at present. Using PIR and some peripheral components, a stable and reliable control system can be formed.