What is an ultrasonic sensor, and a comparison between optical and ultrasonic sensors 1

Ultrasonic sensor is a device that uses ultrasonic waves (waves with a frequency higher than 20 kHz) for measurement and detection. It works by emitting ultrasonic pulses and receiving signals reflected back from obstacles. According to the propagation time, frequency changes, or other characteristic changes of ultrasonic signals, ultrasonic sensors can determine the position, distance, velocity, and even the characteristics of objects.diode

Compared with optical sensors, ultrasonic sensors have some unique advantages and limitations. AT89LP216-20XU optical sensor, including common cameras and laser rangefinders (LIDAR), mainly detects targets through the reflection or scattering of light. Next, we will compare ultrasonic sensors and optical sensors from several aspects.

1. Adaptability to work environment:diode

Ultrasonic sensor: It can work in a dark environment and is not affected by lighting conditions. Ultrasonic waves can propagate in environments with poor visibility such as smoke and dust, so ultrasonic sensors perform well in harsh environmental conditions.diode