Journal
MEASUREMENT
Volume 208, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.measurement.2023.112458
Keywords
Bistable glass-coated microwire; Magnetic field analysis; Strain-stress measures; Mechanical measures
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The paper presents experimental results on contactless strain measurement using bistable glass-coated microwires as substitutes for conventional electrical strain gauges. The results show that the microwires can be used as passive elements without physical connection to the sensing unit, and they can effectively measure strain in metallic materials with ferromagnetic nature or in changing magnetic environments. The influence of parasitic external magnetic fields can also be separated during the measurements.
The paper presents some experimental results related to innovative research focused on contactless strain measurement and the possibility of substituting conventional electrical strain gauges with bistable glass-coated microwires for structural member monitoring. As a part of the aforementioned research, the results of strain measurements performed on samples made of metallic materials with ferromagnetic nature are shown. During the experimental tests, a strain gauge was used to verify and compare the results obtained from the bistable glass -coated microwire, which can be used as a passive element without the requirement of physical connection to the sensing unit. Moreover, an additional examination confirmed the possibility of separating the influence of the parasitic external magnetic field. The results presented in this paper proved that bistable glass-coated microwires could be considered suitable candidates for contactless strain measurements performed on metallic materials with ferromagnetic nature or in a changing magnetic environment.
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