In the current era of rapid technological development, various sensor technologies continue to innovate, bringing numerous conveniences to people's lives and work. Among them, the 24G radar module has emerged in the field of human presence detection. With its unique technical advantages, it is gradually transforming the application models of multiple industries.
I. Working Principle of the 24G Radar Module
The 24G radar module is based on millimeter-wave radar technology, operating in the 24GHz frequency range. Its core principle involves transmitting electromagnetic waves in the millimeter-wave band. When these waves encounter a target object (such as a human body), they reflect back. The radar module receives the reflected echoes and analyzes the signal. By calculating parameters such as the time difference, frequency difference, and phase difference between the transmitted wave and the echo, the module can accurately obtain information about the target's distance, speed, and angle.
For example, when a human body is within the detection range of the 24G radar module, subtle movements such as breathing, heartbeat, and slight limb motions will cause minute changes in the reflected echoes. The module uses advanced signal processing algorithms to analyze these changes precisely, thereby determining the presence of a human body—whether in a stationary, micro-moving, or active state.
II. Advantages over Traditional Human Detection Technologies
(1) High Sensitivity and Precision
Traditional human detection technologies, such as infrared sensing, often only detect human movement and struggle to identify stationary or slightly moving individuals. In contrast, the 24G radar module can detect extremely subtle human actions, such as breathing and heartbeat. Even when a person is completely stationary, it can accurately determine their presence by detecting vital signs like breathing. For instance, in an office setting where employees sit still for long periods, traditional infrared sensors may fail to detect human presence, but the 24G radar module stably and accurately senses it, preventing abnormal device control due to misjudgments.
(2) Strong Anti-Interference Capability
The 24G radar module operates in the millimeter-wave band, making it minimally affected by environmental factors. Unlike infrared sensing, it is not interfered with by temperature, humidity, light, dust, smoke, or other environmental conditions. In complex environments such as industrial factories and warehouses, infrared sensors may experience false alarms or missed detections due to environmental changes, while the 24G radar module maintains stable performance, accurately detecting human presence and providing reliable control signals for related devices.
(3) Wide Detection Range
The 24G radar module has a long detection distance and a large coverage angle. Generally, its maximum sensing distance can reach 6 meters or more, with a detection angle of over ±60°. In large spaces like conference rooms or exhibition halls, installing just a few 24G radar modules can achieve comprehensive human presence detection, significantly improving detection efficiency and coverage.
III. Application Examples in Different Scenarios
(1) Smart Home Field
Intelligent Lighting Control: In homes, the 24G radar module can be installed in lamps or ceilings to detect real-time human presence in rooms. When someone enters, the lights turn on automatically; after leaving for a period, the lights turn off, realizing intelligent lighting control and avoiding energy waste. For example, in a bedroom, when getting up at night, the radar module detects human activity, and a soft night light turns on automatically, providing convenience while creating a comfortable sleeping environment.
Smart Home Appliance Linkage: The 24G radar module can also connect with home devices like air conditioners and fresh air systems. When human presence is detected, it automatically adjusts the air conditioner temperature and fresh air volume, offering a more comfortable and healthy living environment. For instance, in a living room, when a user rests on the sofa for a long time, the radar module senses the human state and adjusts the air conditioner temperature and fan speed to ensure comfort.
(2) Commercial Office Spaces
Office Energy Saving Management: In office buildings, installing 24G radar modules enables intelligent control of lighting, air conditioning, and other devices in work areas. When an office is unoccupied, related devices turn off automatically, effectively reducing energy consumption. Statistics show that this intelligent energy-saving management can cut energy consumption in office spaces by over 30%, saving significant operational costs for enterprises.
Conference Room Management: In conference rooms, the 24G radar module detects occupancy. When someone is present, it indicates the room is in use; when empty, it releases the conference room resources for others to book, improving usage efficiency. For example, in large enterprise offices, multiple conference rooms managed by 24G radar modules allow employees to check real-time availability through the office system and book in advance, avoiding resource waste.
(3) Medical Field
Patient Monitoring: In hospital wards, the 24G radar module monitors real-time vital signs like breathing and heartbeat, as well as whether patients leave their beds. If abnormalities are detected—such as prolonged stillness or abnormal vital signs—the system automatically alerts medical staff to handle the situation promptly, ensuring patient safety.
Medical Device Control: In some medical devices, such as rehabilitation training equipment, the 24G radar module detects the patient's position and movements, adjusting device operation parameters automatically based on their status to provide personalized rehabilitation training plans. For example, in an intelligent rehabilitation training system, when a patient performs limb rehabilitation exercises, the radar module senses the movement trajectory and force in real time, and the device adjusts the training intensity and mode intelligently to enhance rehabilitation effects.
(4) Security Monitoring Field
Intrusion Detection: In security monitoring systems, the 24G radar module serves as an intrusion detection sensor, installed at key positions like doors, windows, and walls. When someone illegally enters the detection area, the module quickly detects human presence and movement, triggering the alarm system and (linking) cameras for and recording, providing timely and accurate information to security personnel. Compared with traditional security sensors, the 24G radar module has higher detection precision and anti-interference capabilities, effectively reducing false alarm rates and improving security system reliability.
Perimeter Protection: In important locations such as factories, warehouses, and military bases, 24G radar modules build perimeter protection systems. By installing multiple modules around the perimeter, they achieve all-around,free (dead-angle-free) detection. When anyone or objects enter the perimeter, the system immediately alarms and notifies security personnel to ensure site safety.
