Arrangement for identifying the position of a movable body with ultrasound

Abstract From the Canadian patent

For identifying the position of a movable body comprising a reflector, a primary transducer and a secondary transducer are utilized which transmit ultrasonic pulses to the reflector and, in turn, detect the ultrasonic pulses reflected by the reflector. A measuring device identifies a positional value assigned to the position of the reflector from the transit times of the ultrasonic pulses from both transducers. To this end, the measuring equipment has a primary control to which a calculator, a primary memory a, timer and a pilot control are coupled. Furthermore the, measuring equipment has a receiver a transmitter and a, transfer device which alternately connects the ultrasonic transducers …