Research on Dynamic Characteristic of Eddy Acceleration Geophone
Zhao Yonghong,Xie Shilin,Hu Shiyue (School of Architectural Engineering and Mechanics, Xi′an Jiaotong University, Xi′an 710049, China)
A seven parameter electromechanical dynamic model of the eddy geophone is derived, where the effects of electromagnetic induction of the shell and the magnet shoes on the induced current of fixed coil are considered. Its accuracy is compared with that of the four parameter model through the parameter identification experiments of two kinds of eddy geophone. The influences of the parameters on dynamical characteristic of geophone are numerically analyzed for the seven parameter model. The numerical and experimental results indicate that electromagnetic induction of the shell and the magnet shoes mainly affects the dynamical characteristic of the eddy geophone in the medium and high frequency domain and thereby the present seven parameter model can describe more accurately dynamical characteristic of the eddy geophone within broad frequency band, which lays a foundation for parameter identification.
【CateGory Index】： P631.436