| 摘要 |
PURPOSE:To be able to automatically obtain data concerned in a defect position by controlling an action of a scanning circuit with signals attendant on a movement of a rotating probe, providing the rotating probe with a signal generator outputting signals concerned in rotation. CONSTITUTION:Angle signals interlocking with rotation of a rotating body 5 and corresponding to the moving distance are transmitted from a signal generator (rotary encoder) 6 connected with the rotating body 5 transmitting and receiving. Signals reflected from a defect of a specimen are added to a receiver 7 through a circuit-changing switch 3 and given an indicator (B mode indication) 11 as a deflection of the vertical direction through a gate circuit 8. The angle signals from the generator 6 are added to a signal converter (counter) 9, the converter counts angle signals reset every rotation, sums up these and converts to moving distance signals from a reference position. A scanning circuit 10 is controlled by signals from the generator 6. The X-coordinate value of scanning lines of the indicator 11 is the value corresponding to the said moving distance and the defect of the ultrasonic wave transmitting-receiving direction at the position on the specimen is indicated on the Y-coordinate corresponding to the propagation delay time. |
