3-axis-gyroscope-dat - 3-axis-Accelerometer-dat - 3-Axis-Magnetic-dat
sensor-hall-dat - sensor-speed-dat - sensor-tilt-switch-dat - sensor-motion-dat - sensor-dat
chips
Sensor Comparison Table
| PIR | RCWL | Radar | Lidar | |
|---|---|---|---|---|
| Features | - Detects infrared radiation from warm objects - Simple motion sensor |
- Microwave Doppler radar - Detects motion through some materials |
- Uses radio waves - Measures distance, speed, direction |
- Uses laser pulses - Creates 3D maps - High accuracy |
| Advantages | - Low cost - Low power - Reliable for basic motion detection |
- Works in darkness - Senses through plastic/glass - Wide angle - Sensitive movement |
- Works in all lighting/weather - Long range - Detects moving/stationary - Penetrates fog/smoke |
- Detailed 3D mapping - Fast response - Accurate shape/surface detection |
| Disadvantages | - Limited range - Cannot detect through walls/glass - Affected by temperature - Only detects living things |
- False positives (fans, pets) - Affected by metal - May trigger on non-human motion |
- More expensive - Complex - Needs calibration - Can be affected by electromagnetic interference |
- Expensive - Affected by rain/fog/dust - Limited in bright sunlight - Cannot penetrate opaque objects |
For detecting a wide range of moving objects, radar sensors are generally the best choice. According to your comparison table, radar sensors offer:
- Long range detection
- Ability to detect both moving and stationary objects
- Operation in all lighting and weather conditions
- Penetration through fog and smoke
These features make radar sensors highly suitable for wide-area motion detection, especially in environments where lighting or weather may vary.
Your table currently lists PIR, RCWL, Radar, and Lidar sensors. Common motion-detecting sensors missing from this comparison include:
- Ultrasonic sensors (use sound waves for motion and distance detection) - sensor-ultrasonic-dat
- TOF (Time-of-Flight) sensors (use light pulses for distance and motion detection) - sensor-TOF-dat
- Camera-based (vision) sensors (detect motion via image processing) == camera-dat - vision-dat
- Accelerometers (detect movement or vibration, often used in mobile devices) - 3-axis-accelerometer-dat
- Gyroscopes (detect rotational motion) - 3-axis-gyroscope-dat
distance measurement
board
most simple motion sensor
APP
Chip
| Models | price |
|---|---|
| LIS3DHTR | 30+: ￥2.17 |
Motion sensor types
- accelerometer-dat - gyroscope-dat - magnetometer-dat - PIR-sensor-dat - radar-sensor - TOF-sensor-dat - LiDAR-sensor-dat - compass-sensor-dat
sensor combination
| Board | sensor 1 | func1 | sensor 2 | func2 |
|---|---|---|---|---|
| SMO1011-dat | HMC5983-dat | compass-sensor-dat | BMP180-dat | sensor-pressure-dat - temperature-sensor-dat |
| SMO1013-dat | MAX30102-dat | pulse-rate-dat |
other
Principle of Tilt Sensors
Tilt sensors are often used for horizontal measurement in systems. Based on their working principles, they can be divided into three types: "solid pendulum" type, "liquid pendulum" type, and "gas pendulum" type tilt sensors. Their working principles are introduced below.
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