Types of Distance Sensors and Their Applications

Introduction:

Distance sensors are widely used devices that measure the distance between an object and the sensor. This article introduces common types of distance sensors and their application areas.

1. Infrared sensors: use infrared light to measure distance by emitting infrared and measuring reflected light. Commonly used for reflection distance sensing, obstacle avoidance, and object detection.

2. Ultrasonic sensors: emit ultrasonic pulses and measure echo time to calculate distance. Widely used in unmanned vehicles, parking assist, and security systems.

3. Laser sensors: use laser beams and measure time of flight or phase differences for distance. Important in industrial automation, surveying, and robot navigation.

4. Millimeter wave radar: measure distance and Doppler by emitting millimeter waves and analyzing reflections. Used in autonomous driving, traffic monitoring, and security.

5. Photoelectric sensors: use light to detect objects and measure distance by intensity or path difference. Widely used in industrial automation and assembly lines.

6. Millimeter wave sensors: based on radar technology, provide high-precision ranging and imaging for drones, security, and medical applications.

Conclusion: distance sensors form an important part of modern technology. Infrared, ultrasonic, laser, millimeter wave, photoelectric, and other sensors each serve specific fields from automation to intelligent transport. As technology advances, sensor performance and precision will continue to improve.