Human body sensing switch and working method thereof

Abstract

The invention relates to a human body sensing switch and a working method thereof. The human body sensing switch comprises a rectifying and filtering voltage stabilizing circuit, a relay drive circuit which is connected with the rectifying and filtering voltage stabilizing circuit and used for controlling the make and break of a magnetic latching relay when passing by the zero point, the magnetic latching relay which is connected with the relay drive circuit and used for controlling the make and break of a controlled alternating current loop, a central control unit connected with the relay drive circuit, an infrared sensor, an amplifying circuit connected with the infrared sensor, and a first comparison circuit and a second comparison circuit which are connected with the output ends of the amplifying circuit and used for obtaining different signal intensity; and the output ends of the first comparison circuit and the second comparison circuit are respectively connected with the input ends of the first sensing signal and the second sensing signal of the central control unit. The invention adopts a thermistor to automatically compensate the influence of the changes of temperature on the sensitivity of the infrared sensor, ensures that the sensitivity of the human body sensing switch is always consistent, and provides work voltage for the human body sensing switch by utilizing the grounding wire so as to lower the power consumption.

Description

technical field [0001] The invention relates to a human body induction switch and a working method thereof. Background technique [0002] Existing human body induction switches often have poor versatility and low reliability. It can only set a threshold value for the induction signal output by the infrared sensor. If the measured induction signal is greater than the threshold value, the controlled AC circuit is controlled to conduct for a period of time, otherwise, no action is taken. Therefore, its function is single, it can neither analyze the induction signals of various intensities, nor can it take corresponding actions according to the frequency of the induction signals, such as prolonging or shortening the conduction time of the controlled AC circuit, thereby improving the human body induction switch. Control the quality, so as to make the product humanized and convenient for users to use. Contents of the invention [0003] The technical problem to be solved by the...

AI Technical Summary

Problems solved by technology

[0002] Existing human body induction switches often have poor versatility and low reliability

It often can only set a threshold value for the induction signal output by the infrared sensor. If the measured induction signal is greater than the threshold value, it will control the controlled AC circuit to conduct for a period of time, otherwise, it will not act.

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