Output displacement model and experiment of transducer considering Galfenol magnetic characteristics

WENG Ling1,2,GAO Jiecong1,2,HUANG Wenmei1,2,CHEN Changjiang1,2,WANG Bowen1,2,CHEN Shenghua2

Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (20) : 93-99.

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PDF(1233 KB)
Journal of Vibration and Shock ›› 2022, Vol. 41 ›› Issue (20) : 93-99.

Output displacement model and experiment of transducer considering Galfenol magnetic characteristics

  • WENG Ling1,2,GAO Jiecong1,2,HUANG Wenmei1,2,CHEN Changjiang1,2,WANG Bowen1,2,CHEN Shenghua2
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Abstract

The energy exchange mechanism of magnetostrictive transducer has an inseparable relationship with the external driving magnetic field and the magnetostrictive characteristics of the material. The output displacement of the transducer depends on the magnetic characteristics of the magnetostrictive material, the external magnetic field, the amplitude transformer and so on. Based on the equivalent circuit method and square approximation model, the displacement output model of the transducer was established by combining the magnetic properties of the material and the vibration equation of the horn, and a window type Galfenol magnetostrictive transducer with unbiased magnetic field was designed. The static and dynamic magnetic characteristics of Galfenol were measured.The experimental test system was built to test the transducer prototype and verify the model.The results show that the theoretical curve of the output displacement amplitude of the transducer is basically consistent with the experimental curve, which verifies the accuracy of the model.When the excitation current is 2A and the resonant frequency is 12.4kHz, the output displacement amplitude is 8.22μm.The model and conclusion are useful for the optimization design and the analysis of the output characteristics of the transducer.
Key words: Galfenol; transducer; output displacement model; magnetic characteristic measurement

Key words

Galfenol / transducer / output displacement model / magnetic characteristic measurement

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WENG Ling1,2,GAO Jiecong1,2,HUANG Wenmei1,2,CHEN Changjiang1,2,WANG Bowen1,2,CHEN Shenghua2. Output displacement model and experiment of transducer considering Galfenol magnetic characteristics[J]. Journal of Vibration and Shock, 2022, 41(20): 93-99

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