| 摘要 |
PURPOSE:To detect defective parts irrespective of the magnitude of ultrasonic reflected waves, by displaying the sizes of the defective parts in different colors by the frequency component signals of the ultrasonic reflected waves and the energy signal corresponding to the sizes of the defective parts. CONSTITUTION:An ultrasonic pulse generator 7 is triggered by the pulse from a time control part 6, by which an ultrasonic probe 3 is excited and ultrasonic pulses are transmitted toward the inside of an object 1 to be inspected. The waves reflected on a defective part 2 are received through the probe 3 in an echo amplifier 8, by which the waves are amplified. The transmission pulses are removed from the reflected waves with a gate circuit 9, whereafter the reflected waves are inputted to a frequency analyzer 10. The frequency component signal are the energy signal corresponding to the size of the defective part from the analyzer 10 are inputted respectively to the Y axis and Z axis of a color display 12, where the defective part is displayed in the different colors corresponding to the magnitude of the energy. On the other hand, the position of the probe 3 is detected by a detector 5 for probe position which receives the signal from a scanner 4 and the signal of said position is inputted to the X axis of the display 12. |
