| Traditional vibration measurements mainly include mechanical, optical and electrical means, as well as the integration of these three methods. The research of vibration measurement system based on magnetic levitation effect in this paper is an exploratory research, which can supply reference to the further application of magnetic levitation effect and developing new vibration measuring method.The variety disciplinarian of the magnetic intensity and force on the condition of various control-current and air gap was obtained through simulating the magnetic field of the hybrid maglev ball system, and the simulated results are verified by experimental measurement. On this basis, the maglev vibration measurement system model is established, and the systematic dynamical equation under exoteric vibration is deduced, which is consistent with the constant coefficient second order differential equation of mass-spring vibration measuring system. The damping coefficient and natural frequency are obtained using the analytical methods of mass-spring system for reference.The time-frequency domain analysis software was compiled to analyze and process the vibration signal. The software can realize vibration signal waveforms display, data browsing and storing,signal filter and other functions. It can also complete further signal analysis, such as autocorrelation, spectrum, phase spectrum, power spectrum in time-frequency domain.Based on the designed Maglev ball vibration measurement system, an exoteric vibration which has a given frequency of 50Hz is measured, and the collected vibration signal are analyzed and processed by the designed time-frequency domain analysis software. The parameters of the vibration signal such as frequency, amplitude, etc are obtained, which validated the feasibility of the system and the theory of Maglev technology to measure vibration. Results of this study can provide a foundation for further research in the vibration measuring system applying magnetic levitation effect. |
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