B5.4 - Signal Processing for Single Transducer Distance Measurement Applications to Reduce the Blind Zone

A. Schröder & B. Henning
Piezoelectric air ultrasound transducers typically have a small bandwidth. So they cannot be used to transmit short signals. This leads to a blind zone which prevents measuring short distances in single transducer applications, because normally receiving is not possible until transmitting is finished. The blind zone is significantly increased if coded signals are used which is necessary to identify different sensors in a multi sensor environment to reduce crosstalk. One solution is to implement a...