Infrared sensing device for detecting static human bodies

Abstract

The invention discloses an infrared sensing device for detecting static human bodies, which comprises a photosensitive sensor, a processor, a light-control signal output module, a stepping motor control module, a stepping motor and a pyroelectric infrared sensor, wherein the light-control signal output module is used for receiving a light-on control signal output by the processor so as to control the light to be on; the stepping motor is used for receiving a rotation control signal output by the stepping motor control module, and driving the pyroelectric infrared sensor installed on the rotating shaft of the stepping motor to rotate according to the control signal; and the pyroelectric infrared sensor is used for scanning a static heat source signal, and controlling the light-control signal output module to output a light-on or light-off signal according to the scanned signal. The device has the advantage of higher recognition rate for human bodies in special locations, such as classrooms and libraries. Since the mechanism is controlled by a program, the speed, angle and forward / reverse rotation of the stepping motor can be rotated, and the rotation control on the sensor is flexible and easy to implement, and the device does not need any complex mechanical structure.

Description

technical field [0001] The invention relates to an infrared sensing device, in particular to an infrared sensing device for detecting a static human body. Background technique [0002] At present, the application of pyroelectric infrared sensor in classroom lighting control is mainly used for the detection of dynamic human body, that is, when the moving human body passes by, it can detect the human body, and when the person sits still, it will cause serious misjudgment. This is because the sensor It uses the change of external infrared radiation to cause voltage output, and when the infrared radiation does not act, the output voltage cancels each other and there is no output. [0003] At present, some mechanical improvement technologies have appeared. Installing the sensor on the rotating mechanism to make the sensor move relative to the human body to detect the human body can have some good improvements. However, due to the complex environment of classrooms, libraries and o...

AI Technical Summary

Problems solved by technology

[0003] At present, some mechanical improvement technologies have appeared. Installing the sensor on the rotating mechanism to make the sensor move relative to the human body to detect the human body can have some good improvements. However, due to the complex environment of classrooms, libraries and other places, static heat sources and motion The human body interferes with each other, and the simple dynamic judgment is not enough to complete the human body recognition function

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