METHOD FOR MANUFACTURING AN ULTRASONIC SENSOR

摘要

The invention relates to an ultrasound sensor(1) and a manufacturing method, the sensor (1) comprising an ultrasound transmitter (102, 103, 104), a cavity (4) arranged in connection with this, which is in resonance mode at the ultrasound frequency used,and the sensor (1) comprises a passive sensor element (3, 3'), the distance of which from the ultrasound transmitter (2) is selected in such a way that the resonance condition is met, located at the opposite end of the cavity (4) to the ultrasound transmitter (102, 103, 104). In accordance with the invention the ultrasound transmitter (102, 103, 04) is a piezo-element.