PROCESSING METHOD OF ULTRASONIC FLAW DETECTION DATA

摘要

PURPOSE:To facilitate the detection of flaws as specified by inspection standard by a method wherein flaw information is picked up by scanning over the surface of steel material to be digitized and after a signal processing, it is outputted as secondary information to extract flaws alone on specified scan lines. CONSTITUTION:Probes 2A-2D are arranged over a steel plate 1 at an equispace and a scanned at right angles to the rolling direction thereof to detect flaws and reflected waves from the steel plate 1 are received by the probes 2A-2D individually to be inputted into a quantization device 6 with transmitting/receiving cables 4A-4D through a flaw detector 3. Then, the quantization device 6 divides flaw information of the steel plate 1 into four stages in terms of the degree of flaws and sends digitized information sequentially to a signal processor 7, with which flaw information is ranked in the form of a mesh throughout the steel plate 1 together with a counter system 8 to discriminate flaws on the dara mesh covering a specified scan line based on the inspection standard. Thus, the evaluation of the steel plate 1 can be done accurately on the basis of the standard.