There is provided herein a robot-based electrical system for locating holidays within coated pipe that does not utilize a grounding wire. In a preferred arrangement, the robot will carry a metal rotating brush / capacitive pad combination and changes in the capacitance in the brush / pad circuit will be used to identify imperfections in the interior coating of the pipe and especially those located proximate a girth weld. In another preferred embodiment, a circumferential brush will be used that allows testing of the integrity of the internal coating throughout the length of the pipe as the robot travels the pipeline.
申请公布号
CA2773876(C)
申请公布日期
2016.03.29
申请号
CA20122773876
申请日期
2012.04.10
申请人
CRTS, INC.
发明人
LANGLEY, RUSSELL;HUGGINS, JAMES A.;CARTER, JOHN D.;PAULLEY, DAVID;ROBERTS, KEITH R.;DAVIS, DARRELL L.;O'NEILL, MICHAEL E;HAYES, STEVE D.;DAVIS, DALE G.;LINDEMANN, JOHN D.