Introduction to sensor switches

The induction switch refers to the human body infrared intelligent induction switch, which is a switch that is automatically activated when someone passes through the infrared induction detection area. The main component of the human body infrared sensor switch is a human body pyroelectric infrared sensor. The human body has a constant body temperature, generally at 37 degrees, so it emits infrared rays with a specific wavelength of about 10μm. The passive infrared probe detects the infrared rays emitted by the human body at about 10μm to work. The infrared light of about 10μm emitted by the human body is enhanced by the Fresnel filter and collected on the infrared sensor source. Infrared induction sources usually use pyroelectric elements, which will lose charge balance when the temperature of the infrared radiation of the human body changes, and discharge the charge outward. The subsequent circuit can trigger the switch after the detection and processing. If the person does not leave the sensing range, the switch will continue to be turned on; after the person leaves or there is no action in the sensing area for a long time, the switch will automatically delay the shutdown of the load.