Transducers of the tonpilz type electrical piezo - 29 has a wide band and issuers and sonar antenna composed of these transducers

摘要

The invention relates to piezoelectric transducers of Tonpilz type, wideband receivers and transmitters and sonar antennas made up of these transducers. A transducer according to the invention of Tonpilz type, includes a stack 1 of transmitter piezoelectric plates 2 interposed between a horn 4 and a counterweight 5. The external face of the horn carries an even number of independent and very thin hydrophones 6, made from piezoelectric polymer, which are symmetric with respect to two orthogonal planes passing through this axis. One application is the construction of sonar antennas which may be used alternately as transmitter antennas on one or more resonant frequencies and as wide pass band listening antennas. IMAGE