電磁誘導形肉厚センサの被覆を有する測定対象物への応用

抄録

We had proposed and developed an electromagnetic thickness sensor which can measure the thickness of a conductor plate or tube coated with rust. However, our measurements were made under rust-free conditions in the previous paper. Therefore, this paper presents the measurement of simulated rusty objects. The theoretical analysis related to rust-free measurement is expanded accordingly. The effects of rust on measurement are discussed using this expanded analytical result. Experimental results for steel plates coated with Teflon film in place of rust verify that our method can measure the thickness of rusty objects and confirm that the upper limit of the measurement is about 2.5mm when the Teflon film thickness is 0.5mm.