Ultrasonic transducer producing high quality acoustic performance uses sensitive element with two electrodes and a protective membrane within an injection molded plastic body

摘要

A body (20) made from a plastic such as phenyl polysulfide is extruded into a jar shaped box (12) and locked into position by a ridge and groove (20e,22). A piezoceramic disk (26) fitted into the body (20) has metallic electrodes (26a,26b) on rear and forward faces with electricity supply by conductors (34,36) from a cable (32). Chemical and physical protection is provided by membrane (38) coupled acoustically to forward electrode (26b).