| 摘要 |
PURPOSE:To easily and smoothly inspect the plate thickness state of a tank plate by using a noncontract type ultrasonic wave generator and an ultrasonic wave detector. CONSTITUTION:The inspecting device 10 runs on the surface of the bottom plate 1 of a tank by itself with wheels 12A and 12B provided to a casing 11. The inspecting device 10 has the ultrasonic wave generator 13, ultrasonic wave detector 14, a data analyzing and storing circuit 15, a control circuit 16, a power circuit 17, and a wheel driving motor 18 incorporated in the casing 11. Laser light L1 from the ultrasonic wave generator 13 is projected on the surface of the tank bottom plate 1 as a body to be inspected to generate an ultrasonic wave in the surface of the tank bottom plate 1. The ultrasonic wave is propagated in the plate and reflected by the bottom surface of the tank bottom plate 1 to return to the surface. Consequently, the ultrasonic wave detector 14 performs detection by the intervention of the laser light L2. Data is analyzed by the data analyzing and storing circuit 15 to measure the plate thickness of the tank bottom plate 1 according to its reflection time. |
