METHOD FOR OPERATING AT LEAST ONE ULTRASONIC TRANSDUCER

摘要

A method for operating at least one ultrasonic transducer (116; 144, 146) is proposed. An excitation frequency is used to excite the ultrasonic transducer (116; 144, 146) to emit ultrasonic waves. At least one received signal (156) is detected by at least one control sensor (152). Emission is regulated to at least one desired frequency using the received signal (156).