科研之友
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摘要
The detecting voltage signal of a magnetostrictive displacement sensor was experimentally studied to improve its detection accuracy. The effects of waveguide wire materials, driving pulse currents, and detecting coil parameters on the detecting voltage signal were analyzed and confirmed. The detecting coil was designed optimally and the parameters for the magnetostrictive displacement sensor were determined. The research shows since the Fe-Ga waveguide has a larger magnetostrictive coefficient and remarkable Weidmann effect, it improves the electric-magnetic-mechanical conversion efficency and obtains more detecting voltage signals. Based on the experimental results, a new type of magnetostrictive displacement sensor with the Fe-Ga waveguide wire was fabricated and its performance was compared with that of a magnetostrictive displacement sensor with the Fe-Ni waveguide wire. The research shows that the detecting signal for the magnetostrictive displacement sensor with the Fe-Ga waveguide wire is obviously enhanced and the signal-to-noise ratio is improved significantly as compared with that with the Fe-Ni waveguide wire. Moreover, the detecting voltage signal amplitude for the magnetostrictive displacement sensor with the Fe-Ga wire increases 40 mV and its detection precision may be 2 times that of the sensor with the Fe-Ni wire.
- 出版日期2016
- 单位河北工业大学
