The operation of a noncontacting magnetostrictive strain sensor (NMASS) is verified experimentally. The sensor has a single excitation and a single detection coil, and utilizes the magnetostrictive effect. The magnetostrictive sensor offers noninvasive strain measurements on ferromagnetic materials with an accuracy comparable to conventional strain gages. The NMASS produces significantly more output compared to strain gages and holds promise for development into a generic strain sensor.
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Kleinke et al. (1993) studied this question.
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