Measuring distances from our robot to other objects, is one of the most common data we want to obtain. For example, if we are building an autonomous vehicle, we want to check it’s distance from obstacles to help it make the right decision about it’s course. There are also many more examples of robots that we want them to activate mechanisms when something or someone gets close to them.
One of the simplest, cheapest and most accurate ways to measure distances, is by using ultrasonic sensors. Their working principle is based on the fact that sound is reflected upon most objects and materials. Continue reading Measuring distance with sound