正および負の磁歪材料を用いた漏れ磁束による荷重センサ

抄録

The load sensor we are researching uses the inverse magnetostriction effect of magnetostrictive materials. It was confirmed that Fe₃₀Co₇₀ exhibits a leakage flux change rate of approximately 130% when compressive stress changes from 1 to 100 MPa, suggesting the possibility of a load sensor using leakage flux using Fe₃₀Co₇₀. In this paper, we focused on the fact that Fe₃₀Co₇₀ Ni alloy has magnetostrictive properties that are opposite to those of Fe₃₀Co₇₀ Ni alloy, and measured the leakage magnetic flux with respect to compressive stress of Ni alloy. It was confirmed that in the Fe₃₀Co₇₀ alloy, the rate of change in leakage magnetic flux increases by 134% when compressive stress is applied, whereas in the Ni alloy, the rate of change in leakage magnetic flux decreases by -78% when compressive stress is applied. The leakage flux of positive magnetostrictive materials increased due to stress, while that of negative magnetostrictive materials decreased. Load sensors for magnetostrictive materials are feasible.