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  • Human body sensing switch circuit diagram and radar sensor principle detailed explanation

    2023-12-04 464

    I. Introduction


    With the continuous development of science and technology, the human body sensing switch circuit diagram and radar sensor principle are more and more widely used in daily life and work. This article will analyze the human body sensing switch circuit diagram and the principle of radar sensor in detail to help people better understand the operation mechanism of these two technologies.

    飛睿智能

    Second, the human body induction switch circuit diagram analysis


    Human sensing switch circuit diagram is a kind of switching circuit based on human weak magnetic field sensing. It is mainly composed of power supply, inductor and output circuit. Among them, the power supply provides energy for the entire circuit; Sensors capture changes in the body's magnetic field; The output circuit converts the signal captured by the sensor into the actual switching operation.


    The type and design of the sensor are the key points in the human body sensing switch circuit diagram. Common inductors are capacitive inductor, inductor, photoelectric inductor and so on. The capacitance sensor uses the capacitance change between the human body and the electrode to detect the human signal. Inductance sensor uses the mutual inductance change between the human body and the coil to detect the human signal; Photoelectric sensors detect human signals by detecting infrared or ultraviolet changes in the body.


    Third, detailed explanation of the principle of radar sensor


    Radar sensor is a kind of sensor that uses microwave to detect the target. By transmitting microwave and receiving the signal reflected back by the target, it judges the position, speed and attitude of the target according to the parameters of the reflected signal such as time, direction and amplitude.


    Radar sensor is mainly composed of transmitter, receiver and signal processing part. The transmitter is responsible for transmitting the microwave, the receiver is responsible for receiving the reflected signal, and the signal processing part processes the received signal to extract the information of the target.


    The advantages of radar sensor lie in its long detection range, high precision and strong anti-interference ability. At the same time, the application range of radar sensors is also very wide.


    4. Comparison between human body sensing switch circuit diagram and radar sensor


    Although the human body sensing switch circuit diagram and radar sensor are a kind of sensor, their working principle and application scenarios are different. The human body sensing switch circuit diagram is mainly used for the human body perception at close range, and the radar sensor is mainly used for the target detection at near and far distances, such as smart home, intelligent lighting and other fields.


    In addition, the sensitivity and anti-interference ability of human sensing switch circuit diagram and radar sensor are also different. The sensitivity of human body sensing switch circuit is high, but the anti-interference ability is poor. The radar sensor has strong anti-jamming ability, but its sensitivity is reduced. Therefore, in practical applications, appropriate sensors need to be selected according to specific needs.


    V. Conclusion


    In this paper, the working principle of human sensing switch circuit diagram and radar sensor is analyzed in detail, and the similarities and differences between them are compared. Each of these two technologies has its own advantages and scope of application, and understanding their characteristics and application scenarios helps us to better choose and use the appropriate sensor technology. At the same time, with the continuous development of science and technology, the application of these two sensor technologies will be more and more extensive, and there will be more innovations and applications in the future.


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