In robotics and engineering in general, sensors play a major role in providing an accurate and precise measure for the different devices we are using in order for the devices to operate the way they do, in other words, sensors extend the capabilities of the devices that we use in our day to day lives such as cars, smartphones, airplanes, and many other devices.
Ultrasonic is a type of sensor that is used to measure distances, it is used in cars, trash level monitoring, liquid level sensing, used in production lines, and many more.
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