Electroacoustic Conversion Technology Research Based on the Giant Magnetostrictive Material

Abstract

The realization of Acoustic Telemetry System(ATS) in the oil field development and production is mainly dependent on the high-power and low-frequency electroacoustic transducer. However, the traditional piezoelectric transducer cannot meet the requirements. In this paper, how to realize high-power and low-frequency electroacoustic transducer with the giant magnetostrictive materials was studied through theoretical analysis and experimental method. Is 14 times larger at least; especially it has wide frequency band and can work under high temperature[3], These are important bases for generating high-power and low-frequency sound waves in the downhole. The research results show that the electroacoustic transducer based on giant magnetostrictive material has the advantages of large output power, wide frequency range, high conversion efficiency and high temperature resistance, which can well meet the ATS for underground information transmission.