大型管件自行式挠度检测系统设计及误差分析

Design and error analysis of an autorun deflection detection system for LSAW pipes

针对大型直缝焊管的挠曲特点设计了自行式挠度检测系统。系统中以遥控小车作为激光三角反射式位移传感器的载体,在框架式的运行轨道上对焊管进行自动测量;系统测量程序以虚拟仪器LabVIEW为软件平台,实现数据采集、输出和显示。通过多组实验,分别分析了激光位移传感器、数据传输线、遥控小车及运行轨道的粗糙度等因素对检测系统的影响,并通过对标准件的测量,得到自行式检测系统的整体误差为±0.5mm。该检测系统满足工业需要。

Based on Longitudinally Submerged Arc Welding （LSAW） Pipes＇ deflection characteristics, an autorun deflection de- tection system is designed. The system uses remote control car as a carrier of the laser triangulation reflective displacement sensor and can automatically measure the pipes deflection by controlling the car autorun on the framework-orbit. In this system, virtual instrument LabVIEW is used as a software platform to collect, output and display the detected data. The effect of laser displace- ment sensor, data cable, remote control car, and running track roughness on the detection system were analyzed by experi- ments. The overall error of the autorun deflection detection system is _--＋0.5ram detected by using a standard part. The detection system can meet industry needs.