| In recent years, with the rapid development of wireless network nodes technology to solve the problem of its self-powered battery technology lag due to bring more and more researchers to get attention. Research has important significance vibration generation technology based on magnetostrictive material on this issue resolved.This paper reviews the research status and development process of magnetostrictive material, a brief analysis of the constitutive relations, highlighting the Armstrong model with three-dimensional characteristics, as well as to study the force of the magnetic coupling characteristics Galfenol Based on this model, oriented topics the research foundation.Then,in turn based on the theoretical basis of magnetostrictive vibration generator, the generator dynamic analysis of the mathematical model and to establish the basis for a cantilever structure as a vibration generator design. Using the finite element method for three different magnetic circuit structure generator model simulation experiments, three structural simulation results were compared to determine the demagnetization factor demagnetization effect on the magnetization curves under different structure and mechanical structure, electromagnetic module combines and integrates the material constitutive model, establish a complete mathematical model.Finally, based on the theory, the use of laboratory equipment for Galfenol alloy static magnetic characteristics tested and compared with theoretical data; designed and produced the fixture, the bias coil, sensing coil and other components, completed the experimental test platform assembled structures. In the final of the natural frequency of vibration generating apparatus 222 Hz,acceleration of simulation data and actual voltage signal conditions under 1g tests and the results were compared, results of the model as a vibration generating device for vibration energy into electrical energy feasibility in conclusion. |
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