INTRODUCTION
The evolution of motion sensors dates back to the evolution of man. It is said to have used by man to calculate the movement of stars to determine the best crop-growing season. Motion sensors gained their popularity during the World War II. The significant increase in demand for detection and monitoring during the World War II generated technological advancements in motion sensing. Radar, which was invented several decades earlier, was being fully developed during the war, to detect the motion of aircrafts. Although the development of radar systems was a great leap forward, it was limited only to military use. ...
