“Have you ever wondered how to explore the inside of pyramid? The deep dark area of ocean? A cave that has just been discovered? These places are considered unsafe for men to enter, therefore an unmanned machine is required to do such exploration, such as robots, drones, etc. usually equipped with cameras, Infrared cameras, etc. to view and map the unknown area live, but these requires certain light intensity, and the data acquired is relatively large. Therefore, sonar system is considered a general alternative.
Now, we can build one remote controlled sonar radar vehicle by using an ultrasonic sensor. This method is inexpensive, relatively easy to get the components and easy to build, and the more important, it helps us understand better the basic system of advanced aerial scanning and mapping instruments.”