Working principle of motion sensor
09 Aug 2019 -
1. The working principle of motion sensor:Motion sensor switch is also called pyroelectric human body induction switch or infrared intelligent switch. It is an automatic control product based on infrared technology. When a person enters the sensing range, the special sensor detects the change of infrared spectrum of the human body. It can automatically switch on the load. If a person does not leave the sensing range, it will continue to switch on. When a person leaves, the load will be automatically closed by delay.
2. The main device of motion sensor switch is human pyroelectric infrared sensor. The human body has a constant body temperature, generally at 36 - 37 degrees, so it will emit a specific wavelength of infrared, passive infrared probe is to detect infrared radiation from the human body to work.