Human body existence sensing system and method based on PIR
A perception system and human body technology, applied in the field of PIR-based human body presence perception system, can solve the problems that PIR sensors cannot directly detect the human body in a static state, low cost, etc., and achieve the effect of simple structure, low cost, and accurate perception
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[0052] figure 2 Among them, the PIR sensor adopts a PIR sensor with a dual-element complementary structure, which is used to detect a stationary human body in front of the Fresnel lens in the detection area. image 3 The mid-infrared shading sheet passes through the detection area of the PIR sensor at a constant speed, s1 is the first group of infrared sensitive elements of the PIR sensor, used to perceive the infrared signal of the detection area 1; s2 is the second group of infrared sensitive elements of the PIR sensor, used to perceive the detection area 2 infrared signals, Figure 4 When the mid-infrared shading sheet passes through the detection area of the PIR sensor at a constant speed, it outputs an infrared signal. v3 is the output signal of the infrared shading sheet passing through the detection area 1 of the first group of outer sensitive elements of the PIR sensor. v4 is the output signal of the infrared shading sheet passing through the second group of infra...
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