Design and analysis of giant magnetostrictive material transducer with bow type structure

Combined with the quality giant magnetostrictive material (GMM), a GMM transducer with bow type structure is proposed based on the triangle amplification principle. The purpose is to improve the actuation stroke of the transducer for bigger sound intensity. At the same time, the requirements of small size of the device and less assembly parts are satisfied. This structure takes the GMM rod as the driving element. With one end of bow type structure being fixed, the bidirectional output is transformed into a one-way output. And the output displacement is further increased using the flexible hinge structure. The working principle of the transducer is analyzed. The theoretical magnification of the structure is 2.73 by analytical calculation. The result is close to that of 2.8 with the finite element simulation model. A prototype is made to be tested through the corresponding test system. And the maximum output displacement is 15.5 m in 1 kHz range, which is close to the simulation result of 14.058 m. The bow type structure achieves the enlarge of the transducers output displacement. And the corresponding analysis method has reflected the output characteristics of the transducer better.