ultrasonic sensor working
An ultrasonic sensor is a device that emits and receives ultrasonic waves to detect the presence, position or distance of objects.
Its basic working principle is to emit a series of high-frequency sound waves in some direction. When an object obstructs the sound waves (like a fish jumping out of water), it produces echoes that are received by the microphone through the sensor board. This is then transmitted back as a series of waves on an oscilloscope trace, which we can see in red against blue noise. And based on their round-trip time, we can judge how far away our target is.
The ultrasonic sensor both produces and detects acoustic waves. It sends out a pulse of sound, then measures the time it takes for the echo to return. Using this data, it can work out just how many inches away an object is.
The major functions of an ultrasonic sensor include obstacle detection, liquid level detection, and measuring the thickness of materials. The technical features that make it different from other sensors include non-contact measurement method, wide beam angles and high accuracy.
These sensors are applied within various fields such as robotics, automotive, industrial automation.
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