Ultrasonic Phased Array Scanner for Measurement and Control in Robotics

Ultrasonic Sensors are known as robust and cheap distance sensors suitable for various applications. This paper describes the realisation of an ultrasonic phased array scanner for long range measurements in air. It consists of a linear arrangement of transducers. Firing the transducers simultaneously results in a very intensive narrow beam caused by superposition of the signals. The measurement direction and the beam width can be controlled electronically.