磁歪千式長距離変位センサに用いられる2検出方式の比較

概要

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This paper describes a long scale displacement sensor using a magnetostrictive wire with a measurement range of over 10 m. Since the sensor is a non contact type that measures the propagation time of the elastic wave transmitted in the wire, it is thought to be suitable as a displacement sensor for transportation systems.However, no sensor of this type with a range of over 5 m has been reported in practical use hitherto.In order to develop a long-scale displacement sensor, it was considered that two detection methods should be compared experimentally: One using an AE sensor, and the other using a detection coil. The expermental results showed that the method using a detection coil is more stable and has a lower attennuation coefficient of the elastic wave detection voltage versus distance than the method using an AE sensor.
社団法人日本磁気学会の論文
1998-04-15