The core principle of millimeter-wave sensors: By emitting millimeter waves (electromagnetic waves) at 24GHz/60GHz/77GHz, and receiving the echoes reflected from targets, distance, speed, and presence status are calculated using "Time-of-Flight (ToF)" or "Frequency Modulated Continuous Wave (FMCW)," similar to a "miniature radar."

A simple analogy: Imagine shouting into a valley and judging its distance by the echo—the sensor emits millimeter waves, which reflect back after hitting a person or object. By analyzing the time difference and frequency changes of the echoes, the presence, distance, and movement of the target can be identified.

Key advantages: They can penetrate non-metallic materials such as plastic and fabric, are unaffected by light and dust, and can achieve all-weather, non-intrusive detection.

Main Application Scenarios (Category by Field)

1. Smart Home/Lifestyle

Human Presence Detection: Smart lighting (lights turn on when someone enters), automatic start/stop of air conditioner/TV, bathroom occupancy detection

Safety Monitoring: Elderly fall detection, baby room breathing micro-motion detection, door/window intrusion alarm

Device Linkage: Smart door lock sensor unlocking, refrigerator door opening reminder, automatic curtains with human tracking

2. Industrial Automation

Object Detection: Production line material arrival recognition, conveyor belt anti-pinch protection, shelf goods presence detection

Distance Measurement: Precise positioning of robotic arms, obstacle avoidance of warehouse AGVs, liquid/material level monitoring

Motion Tracking: Autonomous robot navigation, assembly line workpiece speed detection

3. Smart Security

Concealed Monitoring: Villa/warehouse area intrusion alarm, elevator personnel detection (anti-trapped person)

Access Control Linkage: Sensor-based automatic door opening, building intercom human body sensor wake-up

Contactless Detection: Shopping mall/office building people counting, restricted area intrusion warning

4. Automotive Electronics (Mainly 77GHz)

Driver Assistance Systems (ADAS): Adaptive Cruise Control (ACC), Automatic Emergency Braking (AEB), Lane Keeping Assist

Parking Assistance: Reversing Radar, 360° Panoramic View Distance Detection, Automatic Parking Space Recognition

In-Vehicle Monitoring: Passenger Abandonment Detection (Child Locking Prevention), Driver Fatigue Monitoring

5. Healthcare

Contactless Monitoring: Sleep Apnea Rate Detection, Heart Rate Variability Monitoring (Contactless)

Rehabilitation Assistance: Rehabilitation Training Movement Tracking, Bedridden Patient Turning Reminder

Environmental Monitoring: Medical Equipment Collision Avoidance, Clean Area Personnel Flow Statistics