I. Introduction
With the continuous development of science and technology, the application of human body sensors in daily life and work is more and more extensive. Among them, radar microwave induction switch as a kind of human sensor, because of its high efficiency, sensitivity, reliability and other advantages, is widely used in various places, such as home, office, public places and so on. This article will introduce the principle of human sensor in detail the principle of radar microwave induction switch, so that readers can better understand and apply this kind of technology products.
Second, the principle of human body sensor
The human body sensor is a sensor based on infrared or microwave technology that can sense the movement and presence of the human body in the surrounding environment. When the human body enters the scope of the sensor, the sensor will capture the infrared or microwave signal of the human body, and analyze and process it through the signal processing unit, so as to determine the movement and position information of the human body.
Infrared sensor
Infrared sensors are used to detect and identify infrared signals emitted by the human body. When the human body enters the range of action of the sensor, the infrared signal is captured by the sensor and converted into an electrical signal, and the control signal is output after processing. The advantage of this sensor is high sensitivity and fast response speed, but the disadvantage is that it is more sensitive to other infrared interference in the environment.
Microwave inductor
Microwave sensor is used to detect and identify the microwave signal reflected by the human body. When the human body enters the range of action of the sensor, the microwave signal is reflected back and received by the sensor, and the control signal is output after processing. The advantage of this sensor is that it can penetrate a certain barrier, such as glass, walls, etc., and has a strong anti-interference ability to other microwave interference in the environment.
Third, the principle of radar microwave induction switch
Radar microwave sensor switch is an intelligent switch based on microwave sensor technology, which has the advantages of high sensitivity, long distance detection, and not affected by environmental light. It is mainly composed of transmitter, receiver and signal processing unit.
emitter
The transmitter is mainly responsible for transmitting microwave signals of a certain frequency, which will encounter obstacles and produce reflections when propagated in space. In the radar microwave sensing switch, the transmitter will emit a certain range of microwave signals, which will be reflected back by the human body when propagating in space.
receiver
The receiver is mainly responsible for receiving the reflected microwave signal. When the human body enters the sensing range, the microwave signal reflected back will change, and these changes will be captured by the receiver and converted into electrical signals.
Signal processing unit
The signal processing unit is mainly responsible for the analysis and processing of the electrical signal output by the receiver. It will extract and analyze the amplitude, phase and other information of the signal, so as to determine the movement and position information of the human body. When the human body is detected to enter or leave the induction range, the signal processing unit will output the corresponding control signal to control the opening and closing action of the switch.
Fourth, the application scenario of radar microwave induction switch
Radar microwave induction switch has a wide range of application scenarios, such as home, office, public places and so on. In the family, the radar microwave induction switch can be installed in the corridor, stairs and other locations, when the family passes by the automatic light, automatic off when leaving, convenient and practical. In the office, the radar microwave sensor switch can be installed in the meeting room, lounge and other locations, according to the needs of personnel to automatically control the switch of lighting equipment. In public places, radar microwave induction switches can be installed in corridors, stairs and other locations, according to the flow of people automatically control the switch of lighting equipment, energy saving and environmental protection.
V. Conclusion
As an important application form of human body sensor, radar microwave induction switch has the advantages of high efficiency, sensitivity and reliability, and is widely used in various places. This paper introduces the principle of human sensor and the application scenario of radar microwave sensor switch in detail, hoping to help readers better understand and apply this kind of technology products.
