分析了油气输送埋弧痒接钢管超声波自动探伤系统的组成结构、检测原理、实施方案以及应用状况。该系统采用单元化和模块化结构设计，可任意组合成探伤通道数为1～N的数字化多通道超声波自动探伤系统。配合探伤操作程序，可做到对复杂缺陷回波的准确评价和严格筛选，有效地避免了系统的误报警，实现了缺陷的自动判别、自动报警、自动存储和缺陷波形动态回放，提高了超声波自动探伤检测的准确性和可靠性，误判率〈2％，漏检率为0。%The structure, inspection theory and construction scheme of an ultrasonic automatm flaw ctetecuon system for oil and gas pipeline submerged arc welded steel pipe, together with its application, are introduced. It uses the modular structure and can be any combination of 1 to N channels of a multi-channel digital ultrasonic automatic flaw detection systerrL With the careful program of flaw detection operation, it can evaluate correctly and select strictly for complex flaw echo, and its error in alarm can be effectively avoided. The review of flaw echo waveform overcomes insufficiency of flaw category nondescript in ultrasonic automatic inspection, and achieves misinformation rate smaller than 2%, fail to report rate to 0.
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