Radar human sensor LED automatic light adjustment

The radar body sensor LED automatically adjusts the light to solve the traditional lighting problem. In order to solve the problems of the traditional light that consumes a lot of power, causes visual fatigue, and has no eye protection function, the intelligent LED light has functions such as automatic switch detection and brightness adjustment.

LED is considered to be an important lighting source in the 21st century, with high luminous efficiency, low working voltage and low energy consumption. The design of intelligent LED desk lamp with radar human sensor conforms to the low-carbon design concept of household appliances, which is intelligent and user-friendly.

The radar human body sensor is used to detect the human body and detect whether the user exists, so as to control the switch of the LED light to realize the lighting of people, there is no need to turn on the light in the dark, and the light is turned off when people walk away, which makes the design more energy-saving and user-friendly. The distance of the user to the desktop is detected by the radar body sensor. When the user is not in position, the light level can be adjusted or turned off.

A radar body sensor is an electronic device that uses electromagnetic waves to detect targets. It emits electromagnetic waves to radiate the target and receives the target echo, thereby obtaining information such as the rate of change of the distance from the target to the electromagnetic wave emission point, azimuth, angle, etc. Based on the Doppler effect, the sensing distance is flexible and adjustable, mature CMOS technology, cost-effective, with self- Correction function, free from external interference. Compliant with RED, CE, FCC, ETL and other certification standards, it is widely used in lighting perception, ergonomics, motion detection and control and other fields.

According to relevant data, only 5% of the electricity of incandescent lamps is used for lighting, and the rest becomes heat energy, and even in summer, it will produce a burning sensation. Generally, fluorescent lamps cannot be adjusted due to the power supply method, which is easy to cause energy consumption. At the same time, because the power supply frequency is 50Hz and the stroboscopic frequency is low, the human eye will be in a state of tension, which is easy to cause visual fatigue.

It adopts radar human body sensor, integrates high-performance 32-bit MCU, and the single-chip microcomputer directly outputs sensing control signals. It has powerful functions, rich algorithms and strong scalability, and is suitable for scenarios with high performance requirements. It supports standard UART interface and can be connected with other hosts or sensors, and can also be used as a main controller to realize presence sensing based on human body detection.

The radar body sensor integrates a signal processor, which can directly output sensing control signals. There are a small number of components in the periphery to form a complete microwave sensor, which can meet the ultra-low power consumption requirements of battery-powered application scenarios. When someone is present, the LED Automatically turn on the lights, realize the lights when people come and go out when people leave. The new intelligent LED light source is more energy-saving, more environmentally friendly and more convenient than traditional lighting. It uses a photoresistor to collect ambient light intensity, thereby changing the duty cycle of the PWM signal, and then controls the LED driver to adjust the brightness of the desk lamp, realize PWM dimming, and set human-computer interaction. information.

Using LED can provide a safe and high-quality light environment, improve the light efficiency of the lighting system, do not contain infrared and ultraviolet components, improve glare, reduce and eliminate light pollution, and protect users' eyes. If there is insufficient light in the room and there are people nearby, the LED will intelligently turn on automatically, no need to look for a switch in the dark. When working in the smart dimming mode, the photoresistor needs to sense the external light intensity to adjust its own brightness. In the manual dimming mode, the user can adjust the PWM output to adjust the brightness.