Ultrasonic distance-ranging sensors for non-contact obstacle detection and distance measurement.
Ultrasonic Sensor
Ultrasonic sensors measure distance by timing how long a sound pulse takes to bounce back from a target - the same principle bats and sonar use. They work reliably regardless of a target's color or transparency, which is exactly where infrared distance sensors tend to struggle, making them a favorite for robot obstacle avoidance and general-purpose distance measurement.
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