MANUFACTURING PROCESS OF AN ULTRASOUND TRANSDUCER WITH IMBEDDED PIEZOELECTRIC TRANSDUCER ELEMENT

• Main Authors: Walther, Jens, Rausch, Heiko
• Format: Patent
• Language: English; French; German
• Published: 07.08.2019
• Subjects: ELECTRICITY; FOR PERFORMING MECHANICAL WORK IN GENERAL; GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL; MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY; PERFORMING OPERATIONS; PHYSICS; TESTING; TRANSPORTING

The invention relates to a method for producing an ultrasonic converter core (2) comprising at least one piezoelectric converter element (4) and at least one adaptive body (8), for promoting a vibration coupling between the piezoelectric converter element (4) and a surrounding medium, and at least one temperature expansion compensating member (6) with the following steps: - insertion of the piezoelectric converter element (4) in a moulding tool; - insertion of the adaptive body in the moulding tool; - insertion of a moulding mass in the moulding tool such that the moulding mass forms a force-fit connection, a chemical bond and/or a form-fit connection with the adaptive body (8) and the piezoelectric converter element (4); and - hardening of the moulding mass for the formation of the temperature expansion compensating member (6). The invention further relates to an ultrasonic converter core (2) particularly manufactured according to the method.