| 摘要 |
PROBLEM TO BE SOLVED: To accurately measure a thickness value of a moving sheet, regardless of the material or surface treatment of the sheet, by using a contact method wherein a sensor is in contact with an object. SOLUTION: A moving member 4 is installed at a guide rail 3 so as to be slidable and is driven in synchronization with a moving speed of the sheet, and a measurement arm 5 in an U shape in its side view is mounted on one side of the moving member 4 so that its head section moves across the inside and outside of a conveyance region of the sheet. Furthermore, a case 6a which has an eddy current sensor inside, and an iron anvil 6b which is used as a reference surface reacting to a high frequency magnetic field generated by the eddy current sensor, are arranged on a plane being opposite to the opened edge side of the measurement arm 5 so as to be movable along a direction of contacting with and getting away from each other. COPYRIGHT: (C)2006,JPO&NCIPI
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