| 摘要 |
PURPOSE: To provide a method and a device for omnidirectional eddy current testing, by which flaw detection in all directions can be achieved by a scan in one direction and in a short time. CONSTITUTION: A plurality of eddy current sensor 23 are mounted on a sensor main body 21 while being arranged zigzag in the moving direction X of flaw detection. The plurality of eddy current sensors 23, made in pairs each comprising two sensors in two directions A, B crossing the moving direction X of flaw detection, are simultaneously scanned in one direction for flaw direction as they are selectively switched from one to another by a controller i n such a way that in a certain condition, for example, 1 and 5, and 3 and 7 are made in pairs in A direction while 4 and 9, 6 and 11, and 8 and 13 are made in pairs in B direction, and that in the next condition, 7 and 11, and 9 and 13 are made in pairs in A direction while 1 and 6, 3 and 8, and 5 and 10 are made in pairs in B direction. Detection signals from the pairs of eddy current sensors 23 are processed, recorded, and displayed by the testing device, so that testing in all directions is made possible. |
