In the field of nondestructive inspection by eddy current testing, various approaches to the depth-sizing of SCCs by numerical inversion analysis have been taken so far. However, its accuracy is not so high and limited to a certain extent because of no information about the real value of inner conductivity of SCCs. Therefore, we first investigated experimentally the inner conductivity distribution of several artificial SCCs by a precise mechanical processing and 4 terminal resistance measurement. From ...
英字タイトル:
Improvement of a SCC depth-sizing technique using ECT analysis with detailed investigation of SCC conductivity distribution

A new electromagnetic method for the nondestructive evaluation of gears is proposed. A permanent magnet generates a static magnetic field and a coil of several hundred turns wrapped around it is used to pick up eddy currents induced inside rotating gears. This electromagnetic nondestructive evaluation method is applied to the rotating machine with gears. By monitoring the movement of the gear in a rotating machine, the wear of teeth of gear has been evaluated. ...
英字タイトル:
Study of Evaluation Method for the Amount of Wear-Out of Gears with Electromagnetic Sensor