A Magnetostrictive Transducer Design
A magnetostrictive sonar transducer operating at 1350 Hz is described. The device is a small double-ended piston containing three terfenoi rods in independent magnetic circuits. The paper presents detailed aspects of the design and a summary of test results. An important observation is the effect of heat on terfenoi, which causes changes in elastic modulus and hence resonant frequency. Experience with this device allows a course to be set for future studies, both into material properties and associated transducer designs.
KeywordsPermeability Cage Nylon Acoustics Sonar
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- 12.1K.C.Pitman, A.Branwood, and A.R.Pierce, “Device Oriented Measurements of Terfenol Materials,” Proceedings of Second International Conference on Giant Magnetrostrictive and Amorphous Alloys for Sensors and Actuators. October 1988.Google Scholar
- 12.2Mu-metal Alloys Publication TP11–576, Telecon Metals Ltd, Crawley, Sussex.Google Scholar