Millimeter wave radar sensor is an electronic device that uses millimeter waves

(wavelength 1-10 mm, frequency 30-300GHz) for detection. It has the characteristics of small size, high resolution, strong penetration, etc., and is widely used in automotive, industrial, medical, security and other fields.

Working principle

Emitting electromagnetic waves: The radar transmitter sends out modulated signals such as frequency modulated continuous wave (FMCW).
Receiving echo: The receiving antenna captures the echo signal reflected by the target object.
Signal processing: By analyzing the time difference and frequency difference between the transmitted wave and the echo, the distance, speed and angle of the target are calculated.

Main features

High precision: The distance resolution can reach the centimeter level, and the target can be accurately detected.
All-weather operation: It is less affected by weather, has strong ability to penetrate fog, smoke and dust, and can work all day.
Strong anti-interference ability: It is not easily affected by ambient light and electromagnetic interference, and has stable performance.
Small size and easy integration: It is suitable for embedding in various devices to achieve miniaturization and intelligence.

Application areas

Automotive electronics
Adaptive cruise control (ACC): Real-time monitoring of the vehicle in front, automatically adjusting the speed to maintain a safe distance.
Automatic emergency braking (AEB): Automatically brake to avoid accidents when a potential collision risk is detected.
Blind spot monitoring (BSD): Monitor the vehicle's blind spot and remind the driver to pay attention to the side and rear vehicles.
Industrial automation
Liquid level measurement: High-precision non-contact measurement of liquids and bulk materials, suitable for chemical, food and other industries.
Object detection and tracking: Detect the position and speed of objects on the production line to achieve automatic control.

Smart home

Human presence perception: Detect the presence of people in the room to achieve automatic adjustment of smart lighting, air conditioning and other equipment.
Fall detection: Monitor the activity status of the elderly or children and issue an alarm in time.

Security monitoring

Intrusion detection: Build an invisible warning area to accurately detect intruders.
People counting and trajectory analysis: Count the number of people in the area and analyze the trajectory of action.

Technical challenges and development trends

Improve resolution and detection distance: Improve target recognition capabilities by optimizing antenna design and signal processing algorithms.
Reduce costs: With the maturity of technology and large-scale production, reduce production costs and promote popularization and application.
Integrate multi-sensor technology: Fusion with sensors such as cameras and lidar to provide more comprehensive and accurate environmental perception information.
Improve intelligence level: Combine artificial intelligence and machine learning technology to achieve smarter target recognition and behavior analysis.

Millimeter-wave radar sensors play an important role in many fields with their unique advantages. With the continuous advancement of technology, their application prospects will be broader. Ebyte's millimeter-wave radar module E54-24LD12 series (24GHz millimeter-wave radar) is suitable for smart homes and industrial automation, covers a wide range of human micro-motion sensing, integrates AIoT sensors and signal processing algorithms, supports plug-and-play, and is suitable for human presence detection in indoor environments. Applicable to home/office (lighting control, smart home appliance energy saving), industry (production line material detection, equipment status monitoring).