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

Inactive Publication Date: 2021-01-29
CHANGZHOU INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention discloses an IPR-based human body presence sensing system and method, which solves the problem that a PIR sensor cannot direct

Method used

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  • Human body existence sensing system and method based on PIR
  • Human body existence sensing system and method based on PIR
  • Human body existence sensing system and method based on PIR

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Embodiment

[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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Abstract

The invention discloses a human body existence sensing system and method based on PIR. The system comprises a sensor detection unit, a mobile shading unit, a signal processing unit, and a power supplyunit. The sensor detection unit is used for detecting an infrared signal radiated by an object surface or a human body; the mobile shading unit periodically moves and is used for periodically enabling the infrared signal to enter the sensor detection unit; the signal processing unit is used for receiving and processing the infrared signal output by the sensor detection unit and outputting periodic control signals to the mobile shading unit; and the power supply unit is used for providing a working power supply for the sensor detection unit, the mobile shading unit and the signal processing unit. A problem that a PIR sensor cannot directly detect a human body in a static state is solved, accurate perception of the human body in the static state can be achieved, the structure is simple, andthe cost is low.

Description

technical field [0001] The invention relates to the technical field of infrared detection, in particular to a PIR-based human body presence sensing system and method. Background technique [0002] A PIR sensor (pyroelectric infrared sensor) is a passive infrared detector, usually packaged by a single or multiple infrared sensitive elements and transistors, and detects the surrounding environment through the pyroelectric effect generated by the ambient infrared radiation on the crystal. Moving objects, using this feature can realize the detection of human body movement. Due to its low cost, low power consumption, high sensitivity and simple application, it is widely used in security systems, lighting control, temperature measurement, energy saving and controllable, etc. field. However, the pyroelectric effect is a charge release phenomenon in which the crystal polarization intensity changes with temperature. After the temperature change stops, the crystal charge release stop...

Claims

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Application Information

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IPC IPC(8): G01J5/00G01J5/02G01J5/06G01J5/12
CPCG01J5/0025G01J5/12G01J5/027G01J5/0205G01J5/06G01J5/068G01J5/80
Inventor 唐学忠
Owner CHANGZHOU INST OF TECH
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