超声水浸探伤检测闸门自动跟踪电路研究  

The design of water ultrasonic flaw detection gate automatic tracking

作　　者：武刚[1] 杨录[1] 张艳花[1] 

机构地区：[1]中北大学信息与通信工程学院电子测试技术国家重点实验室,山西太原030051

出　　处：《中国测试》2016年第4期81-85,共5页China Measurement & Test

摘　　要：针对传统超声探伤应用中缺陷信号选通闸门通过硬件或程序预先设置,当缺陷信号相对闸门位置发生变化而引起系统漏检或误判的问题,设计一种高可靠性的闸门自动跟踪电路。该电路具有自动跟踪水钢界面波位置,实时调整选通闸门开启位置选择对应缺陷波的功能。通过和常规闸门电路进行对比测试,该跟踪电路性能稳定、可靠,能够自动跟踪超声检测的界面波并自动调整闸门位置对缺陷波进行探伤。经过实际检测测试:该电路能有效将检测系统中由于工件位置相对浮动而产生的漏检或误判概率降低一个数量级,为精确判伤提供可靠保障。In the applications of conventional ultrasonic flaw detection,fault signal strobe gates are set via hardware or program beforehand. But this makes the system fail to examine flaws or misjudge it when the fault signal changes relative to the gate position. A highly reliable automatic gate tracking circuit was designed accordingly. The circuit has the function of automatically tracking water and steel wave interface positions and adjusting the open positions of strobe gates in real time to select corresponding flaw wave. The comparison test with conventional gate circuits reveals that this circuit is more stable and more reliable and can be used to automatically track the interface wave of ultrasonic testing and automatically regulate the gate position to detect flaw wave. As indicated in practical test, this circuit can reduce a magnitude order of missing probability or error probability in detection system caused by relative floating of workpiece positions,thus providing a guarantee for accurate flaw detection.

关 键 词：超声探伤 缺陷信号 自动跟踪 闸门电路 

分 类 号：TP301.6[自动化与计算机技术—计算机系统结构]