| 摘要 |
PURPOSE:To permit recording of existing places, length and width of flaws by X-scanning the surface of a plate material at a right angle to the rolling direction, drawing out the flaw information in unit positions, quantizing the same, then processing and storing the same as the flaw information in steel plate units and making logical judgement. CONSTITUTION:A steel plate 1 which is a material to be inspected is conveyed and controlled in an arrow direction. Ultrasonic probes 2A-2D are juxtaposed at equal intervals in the rolling direction of the plate 1, and are so driven as to scan the inside of the plate 1 in the X direction at a right angle to the rolling direction. A flaw detector 3 transmits ultrasonic signals to the plate 1 and extracts flow information from the reflected waves. A quantizing device 6 classifies the information in four stages; absence of flaws, light flaws, about middle flaws and heavy flaws, and applies said information as code information to a signal processing unit 7. The unit 7 adds the information from the unit section in the X direction, and applies the number of the unit sections having flaws as 8 sets of code information to a logical judging device 8. The device 8 has a device for storing the code information to be outputted by the unit 7 for one sheet of the steel plate, decides the existing places, and the length and width of the flaws in the rolling direction of the plate 1 and feeds the same to a recorder 9. |
