CONTROLLING METHOD OF ULTRASONIC FLAW DETECTION AND DRIVING DEVICE

PURPOSE:To prevent an increase in the scale of a driving device and to prevent a flaw detection position from being limited, by connecting the driving device and its controller together through copper wire cables and optical cables. CONSTITUTION:For example, a ultrasonic flaw detection and driving device performs automatic flaw detection at the weld zone 3 between the main body 1 and nozzle part 2 of the pressure vessel of a nuclear power station. The driving device consists of an annular track 4 fitted to the nozzle, a main body 5, and an arm 6 and performs the ultrasonic flaw detection while scanning a probe 7 in an X and an Y direction. In this case, a Z shaft is provided for pressing the probe 7 against the pressure vessel body 3; the Z shaft is driven by a solenoid and an X and an Y shaft are driven by a DC motor. The controller 12 for controlling the driving device is installed in a control room outside of the nuclear reactor containment vessel 11 and connected to driving devices 4-6 through cables 7- 10.