In the wave of modern science and technology development, sensor technology has become an important force to promote the innovation of intelligent life and work. Among them, 24GHz radar sensor with its unique advantages, has been widely used in the field of human sensing switch. This paper will analyze the working principle of 24GHz radar sensor and the structure of human body sensor switch in detail, to provide readers with a window to understand this technology.
First, 24GHz radar sensor working principle
24GHz radar sensors, as the name suggests, operate in the 24GHz band. This frequency band has the characteristics of strong penetration, good anti-interference ability, long transmission distance, etc., which makes 24GHz radar sensors perform well in many applications. Below we will elaborate its working principle from the aspects of transmission, reception, signal processing, etc.
Transmitting part
The 24GHz radar sensor generates a stable 24GHz high-frequency signal through an internal oscillator, which is amplified by power and transmitted to space by the antenna. These high-frequency signals propagate in space in the form of electromagnetic waves and are reflected after encountering obstacles.
Receiving part
When the emitted electromagnetic waves meet an obstacle and are reflected back, the radar sensor's receiving antenna captures these reflected signals. The received signal is sent to the signal processing unit after low noise amplification, filtering and other processing.
Signal processing
The signal processing unit is the core part of the 24GHz radar sensor, which is responsible for extracting useful information and judging the distance and speed of obstacles according to it. The distance of obstacles can be calculated by frequency analysis and phase comparison of the received reflected signals. By analyzing the signals received continuously, the speed of the obstacle can be calculated.
Second, the human body induction switch structure
Human sensing switch is an intelligent switching device based on 24GHz radar sensor technology, which can automatically detect and respond to human movement. Below, we will introduce the structure of the human body induction switch in detail from the aspects of structural composition and working principle.
Structural composition
The human body sensor switch is mainly composed of 24GHz radar sensor module, signal processing and control module, power module and output execution module.
(1) 24GHz radar sensor module: responsible for transmitting and receiving high-frequency signals to achieve the detection of human movement.
(2) Signal processing and control module: The signal received by the radar sensor module is processed, the human movement information is extracted, and the action of the output execution module is controlled according to the preset threshold and logic judgment.
(3) Power module: provides a stable power supply for the entire switchgear.
(4) Output execution module: according to the control signal of the signal processing and control module, perform switching actions, such as controlling the switch of the lamp and triggering the alarm.
Working principle
The working principle of the human sensor switch is based on the detection of human movement by 24GHz radar sensors. When a human body enters the detection range of the radar sensor, the sensor will emit a high-frequency signal and receive the signal reflected back. Signal processing processes the received signals with the control module to extract human movement information. When the human movement is detected and the preset conditions are met, the control output executive module performs the corresponding switching action.
Specifically, the human body sensor switch can be set by different detection distance, sensitivity and other parameters to adapt to different application scenarios. For example, in public places such as corridors and corridors, longer detection distances and higher sensitivity can be set to ensure timely response to human movement; In private Spaces such as bedrooms and study rooms, a shorter detection distance and lower sensitivity can be set to avoid false triggering.
In addition, the human body sensor switch can also be linked with other smart devices to achieve richer functions. For example, it can be combined with intelligent lighting system to realize automatic control of people to light up and people to go off; It can also be combined with intelligent security systems to achieve human intrusion detection and alarm functions.
Third, application and development prospects
24GHz radar sensor and its human body sensing switch technology have been widely used in smart home, intelligent security, industrial automation and other fields with its unique advantages. With the continuous development of technologies such as the Internet of Things and artificial intelligence, the application prospects of this technology will be broader.
In the future, we can expect 24GHz radar sensors to achieve further improvements in accuracy, stability, power consumption and other aspects, while their costs will continue to decrease with technological progress and market competition. This will make intelligent devices based on 24GHz radar sensors such as human sensor switches more popular, bringing more convenience and safety to people's lives and work.
In addition, with the rapid development of 5G, edge computing and other technologies, 24GHz radar sensor technology will also be combined with these advanced technologies to achieve more efficient data transmission, more intelligent data processing and decision-making. This will further promote the depth and breadth of applications of intelligent devices such as human body sensing switches in smart homes, smart cities and other fields.
In summary, the working principle of 24GHz radar sensor and the human body sensor switch structure are an important part of the development of intelligent technology. By deeply understanding its working principle and structural characteristics, we can better apply this technology and create more value for our life and work. At the same time, we should also pay attention to its future development trend and technological innovation in order to maintain an innovative position in the competition.
