| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 100 === Magnetostrictive effect which the magnetostrictive metal will be induced under different magnetic field change and will produce the corresponding strain deformation to propagating an elastic wave, which can be identified the occurrence of magnetic field change at location information. Because the advantages of accuracy and reliability making this sensing devices more and more common used in a variety of automation processes and mechanical control components; for example of the position sensing deviceson motion control or liquid level monitoring requires high accuracy and fast response speed. Usually, the sensing device is dramatically variation by material properties, mechanism design configuration and need be special carefully design; also the most challenge is on how to reduce the temperature coefficient under certain wide operation conditions, to get a consistent accuracy independent of ambient or process temperature change. This research studied diversity of materials and driving characteristics for magnetostrictive sensor and constructed a high-precision positioning platform to analyze all these concerns above, discuss the dependence on wave propagation strength, speed response, reflection and damping by mechanical configuration, signal enhancement and filtering scheme and other features.
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