| 摘要 |
PROBLEM TO BE SOLVED: To provide a device for measuring the thickness of a vessel steel plate that has a vessel mirror part formed by a spherical or conical curved surface such as a reaction vessel and can easily measure the thickness of the vessel steel plate even in the case having various kinds of obstructions at a vessel barrel. SOLUTION: The device for measuring thickness comprises a traveling carrier 6 that is a traveling carrier, has a steering mechanism capable of varying the radius of curvature of a travel locus in the front wheel or rear wheel, and can travel on a steel plate of the vessel mirror part 1a that is formed of a curved surface having a predetermined curvature and has a circular projected shape, an ultrasonic probe unit 7 that is mounted to the traveling carrier 6 and has a plurality of ultrasonic probes 7, a supporting point member 20 detachably provided from a supporting point set at the central axis of the vessel mirror part 1a, a supporting point whose one end is connected with the traveling carrier 6 rotatably via a guide joint, and the other end is disposed in the supporting point member 20 rotatably about the supporting point member 20, and that is set about the axis of the vessel mirror part 1a, and a turning radius regulating member 19 for regulating the separation distance from the traveling carrier 6. COPYRIGHT: (C)2007,JPO&INPIT
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