Earlier years ago, most of the human sensing lights were applied to the community corridors, public toilets and other places.
In recent years,
Intelligent human sensing light
More and more applications have brought a lot of convenience to our lives. Especially for families with babies and elderly people, they often need to get up at night. After installing the human sensing lights, they can avoid the problem of finding switches to turn on the lights in the dark.
Moreover, the light sources of the general sensing lights are soft and do not have a dazzling feeling after lighting. It is very friendly to the eyes … Many advantages make the human sensing lights more popular.
Human sensing lights are actually a sensor lamp made of new technology designs and developed by the principle of infrared and thermal power generation to sense the information of human activity information. It is a product that is specially used to detect and inductive human activity information.
When a person or an object with a temperature enters the module induction range, the induction module will output a high -power flat pulse signal, or a high -level delay signal, the output sensing pulse or delay signal can directly drive the LED light indicator light indicator light , LED lighting.
The human body has a constant body temperature. Generally, it is 36-37 degrees, which will emit a specific wavelength infrared ray. The thermal release sensor is used to detect the infrared rays emitted by the human body.
Heat Power Sensor
The 9.5um infrared emission emitted by the human body enhances the source of infrared induction through Fresnel lenses. The infrared induction source usually uses heat -withs electrical components. This component will lose charge balance when receiving the changes in the infrared radiation temperature of the human body, and outward, outward Release the charge, the subsequent circuit can trigger the switching action after being detected. If people do not leave the inductive range, the switch will continue to be connected; after the person leaves or has no action in the inductive area for a long time, the switch will automatically delay the load.
Among them, there is an important part -Fresnel lens.
There are two effects of the Fresnel lens: one is to focus; the other is to divide the detection area into several Ming and dark areas, so that the physical fitness of the movement area into the detection area will produce changes in PIR in the form of temperature changes. Infrared signal.
The detection radius of the sensor during the Fresnel lens is less than 2 meters, and the detection radius of the sensor during the Fresnel lens can reach 10 meters. The thermal release sensor can only play the maximum role with the use of the Fresnel lens.
Precautions for buying induction lights
1. Try to choose a reliable induction light brand when purchasing. If you are infrared, try to choose a hemisphere probe. Such probes sensing lights are wider and reliable for human detection areas. In order to make the lamps more beautiful, many manufacturers have not been designed by hemispherical probe, so they are narrowed in the area.
2. If it is only used indoors, you do not need to pursue the sensation distance and buy a microwave induction light. If the sensing distance is far, the inductive area is increased, and the lights are likely to light up when you don’t need it, causing an error sensing. Therefore, we must choose the right sensing light type according to the occasion when buying.
3. If the LED human body induction light used outdoors, the circuit should be considered in advance. When installing, you must pay special attention to waterproof problems to avoid leaving hidden safety hazards.