TRANSDUCTEUR A ULTRASONS A ELEMENT PIEZOELECTRIQUE ET CAPTEUR DE DISTANCE EQUIPE D'UN TEL TRANSDUCTEUR A ULTRASONS ET SON PROCEDE DE FABRICATION

An ultrasonic transducer comprises a piezoelectric element 10, with a printed circuit board 20 and with a diaphragm pot 30. The piezoelectric element is attached to the front face 32 of the diaphragm pot and connected via at least two leads 40,42 to signal connection points 22 of the printed circuit...

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Bibliographic Details
Main Authors SCHNEIDER MICHAEL, BAYARSAIKHAN BAYAR, SIEGFRIED SCHAEFER THOMAS, RAPPS PETER
Format Patent
LanguageFrench
Published 02.03.2018
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Summary:An ultrasonic transducer comprises a piezoelectric element 10, with a printed circuit board 20 and with a diaphragm pot 30. The piezoelectric element is attached to the front face 32 of the diaphragm pot and connected via at least two leads 40,42 to signal connection points 22 of the printed circuit board 20. In one arrangement a portion 24 of the circuit board projects into the diaphragm pot. The portion of the PCB may be smaller in width than the clear width of the diaphragm pot, and the remainder of the PCB may be arranged outside the pot. Alternatively the leads 40,42 (e.g. wires, single core cables) are arranged so that they run with a spacing from one another which is smaller than half the width of the piezoelectric element, preferably no more than the electrode gap width of the element 10. The transducer may be attached to a panel of a motor vehicle and used as a distance sensor . The distance sensor includes the ultrasonic transducer and also an acoustic damping ring 72 and a housing 70.
Bibliography:Application Number: FR20120055515