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首页> 外文期刊>Key Engineering Materials >Development of a Scanner and a Control System for an Automated Ultrasonic Testing of Pipe Elbows
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Development of a Scanner and a Control System for an Automated Ultrasonic Testing of Pipe Elbows

机译：管道弯头自动超声检测仪和控制系统的开发

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摘要

It is quite difficult to use conventional scanners for an AUT of pipe elbows, because the curvature of inside radius section is different from that of outside radius section. To solve this problem, a few commercialized scanners use two guide tracks. One is for the guide of longitudinal movements and the other is for that of transverse movements. The scanners of these types have many limitations to be applied to the AUT of piping elbows which have different curvatures like nuclear power plant pipes of which the spaces are narrow among the complex pipe lines. In order to solve these problems, both a new scanner and a new control system are developed for the automated ultrasonic testing of pipe elbows. Instead of a longitudinal guide track and an encoder for guiding and measuring longitudinal movements, we devised a scanner and a control system using surface wave. A surface wave transducer attached to the scanner receives the signal transmitted from another transducer which is fixed on the pipe. The distance between two transducers is calculated immediately, and the current scanner position is generated. This new system can avoid an inaccuracy caused by possible slip of encoders and can remove a curved longitudinal guide track.
机译：对于管弯头的AUT，很难使用传统的扫描仪，因为内半径部分的曲率不同于外半径部分的曲率。为了解决这个问题，一些商业化的扫描仪使用两个导轨。一种用于引导纵向运动，另一种用于横向运动。这些类型的扫描仪具有许多局限性，无法应用于曲率不同的管道弯头的AUT，例如核电站管道，其在复杂管道之间的空间狭窄。为了解决这些问题，开发了新的扫描仪和新的控制系统，用于管道弯头的自动超声测试。代替纵向导轨和用于引导和测量纵向运动的编码器，我们设计了使用表面波的扫描仪和控制系统。连接到扫描仪的表面波换能器接收从固定在管道上的另一个换能器传输的信号。立即计算两个换能器之间的距离，并生成当前扫描仪位置。这种新系统可以避免编码器可能打滑而造成的不准确性，并可以去除弯曲的纵向导轨。

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