Radar (RADAR) is a type of radio detection and distance measurement. Its main components include transmitter, transmitting antenna, receiver, receiving antenna, signal processor and display (external). The electromagnetic energy generated by the radar transmitter is transmitted to the transmitting antenna, and the transmitting antenna radiates to the atmosphere, forming the radar electromagnetic wave to propagate forward. In the course of operation, the radar wave contacting the object is reflected and obtained by the receiving antenna of the radar receiver, forming the echo signal of the radar.
According to the principle of the Doppler effect, the frequency and amplitude will change with the motion state of the hit object. If the object touched by the radar wave is fixed, the frequency of the reflected echo does not change. If the target is close to the radar antenna, the frequency of the reflected signal is higher than the frequency of the transmitter. Conversely, when the target is far away from the antenna, the frequency of the reflected signal will be lower than the frequency of the transmitter. In this way, the relative movement speed of the target and the radar can be calculated by the value of the frequency change, and then processed by the signal processor, so as to realize the positioning of the target and the determination of the shape movement trajectory.
In many cases, we will use equipment that detects human movement. People first use infrared sensor modules or photoelectric switches on the human body. But now we have found another module that works well and is cheap. This is a microwave radar module. The principle is to detect the microwave generated by the movement of the object, which can detect the movement of people, animals or objects indiscriminately, and the detection range is very sensitive, and the detection range is large, presenting a fan that can be detected before and after.
LED is also known as the fourth-generation lighting source or green light source. LED uses cold light source as light-emitting element, which has many advantages such as energy saving, environmental protection, long life, small size, and controllability. Due to the rapid development and penetration of computer technology, automatic control technology, bus technology, signal detection technology, and microelectronics technology, lighting control technology has also been developed by leaps and bounds. With the LED light source's small size, fast start-up, dimming, frequent switching, and no impact on performance, and consistent with the direction of intelligent lighting control, LED intelligent lighting came into being.
The radar microwave induction device uses electromagnetic waves as the transmission medium, using the principle of Doppler effect and Fourier transform technology, so that the high-frequency phase and frequency difference accurate analysis system can accurately detect the carrying animals with high sensitivity, regardless of people or vehicles, as long as Movement can be detected. Microwave oven technology is one of the most advanced LED fluorescent lamp intelligent products in the world today. It can effectively reduce lighting power consumption, reduce energy waste, and achieve energy saving and emission reduction.
The following introduces a microwave radar module, the Ferry Smart FR58L2MS-3020S radar module, which works at 5.8GHz and integrates radar receiving, intermediate frequency circuit and MCU processing functions. A small amount of peripheral circuit is equipped with a peripheral circuit that is a radar sensor. Embedded lamps, which contain household appliances and various electronic products, can realize the induction detection of people, cars and various moving objects.
Features:
? Working frequency: 5.8Ghz±75MHz
? Input voltage 4.5-5.5V
? Working current 38-50mA
? The forward distance can reach 15m
? Integrated PLL phase-locked loop, automatic frequency lock to 5.8Ghz±75MHz
? Industrial grade, support high and low temperature (-40°-85°) reliability test
? Integrated intermediate frequency processing and filtering
? Flexible pipe angle interface
? Integrated MCU microprocessor
? Integrate core algorithm coordination and software solutions
? Support distance adjustment
? Comply with FCC/CE/SRRC and other wireless certification standards.
The radar-sensing ceiling lamp module integrates the LED light source panel and the intelligent sensor module, and is used to replace the traditional light source and the intelligent sensor device of various floor ceiling lights. The back-type adsorption magnet does not require screw fixings, and is convenient to install on the base of all kinds of iron ceiling lamp housings. With the intelligent control circuit of the radar induction driving power supply, the lights are on when people come and the lights are off, which can meet the needs of various corridor lighting.
Radar inductive ceiling lamp module: using Doppler principle. The microwave induction lamp emits high-frequency electromagnetic waves (5.8GHz) and receives their echoes. This microwave induction lamp detects the internal changes of the echo and the small movement within the detection range. The signal can pass through thin wooden doors and glass panels. Compared with traditional light bulbs, it saves 85% of electricity, and is smarter and more energy-saving. The microwave induction ceiling lamp module does not need to remove the entire ceiling lamp, and no additional wiring is required. The original lamp body is directly disassembled, and the 220v microwave induction ceiling lamp module is immediately connected after power on It can be used, save time and labor, save electricity, save electricity, no noise interferes with the owner, kill three birds with one stone.
