The working principle of human sensor light

January 10, 2023

There are many different types of sensing lights on the market, and the following types of induction lights are the most common: sound-light sensing lights, human infrared induction lights, and radar induction lights.

The infrared human body induction light can achieve the turn on the lights when quiet and indifferent. It is mainly composed of a thermal release sensor Garfinier lens and peripheral control circuit.

Thermal release sensor can sense thermal radiation released by the human body temperature, and the Phyl lens can collect and focus on the release of infrared rays.

When someone appears within the inductive range, the infrared radiation of the human body's heat released by the Phyl lens focuses on the thermal release sensor, and then outputs a control model from the thermal release sensor Essence

Working principle
Anyone with temperature will generate heat radiation, and the wavelength of different temperature objects has different wavelengths, and the human body has a constant body temperature. Therefore, it will radiate a specific length of infrared. This wavelength leads to changes in current and triggers alarm. Infrared thermal -emitted human sensors work by detecting infrared rays emitted by the human body.
The main principle is: the infrared rays of about 10 μm emitted by the human body are enhanced by the Fresnel lens and gathered on the PIR (passive infrared) detector of thermal release component,
When a person moves, the launch position of infrared radiation will change, and the component will lose the charge balance, the heat -withdrawal effect will release the charge outward, and the infrared sensor will be converted through the changes in the infrared radiation energy of the Fresnel lens to the infrared radiation energy to be converted into the infrared radiation energy to become into the infrared radiation energy. Telecom signal, that is, thermal power conversion.

When the non-human body moves in the detection area of the passive infrared detector, the infrared sensor only feels the background temperature. When the human body enters the detection area, through the Fresnel lens, the thermal release infrared sensor is sensing to the human body temperature and background. The difference in temperature, after the signal is collected, compares the detection data existing in the system to determine whether some people and other infrared sources have entered the detection area.
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Author:

Mr. Kuang

E-mail:

sales@sensorsled.com

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+8618923869655