| 摘要 |
A system and method for identifying, locating and marking an underwater pipeline anomaly such as excessive pipe wall corrosion. An inspection tool is pulled through the pipeline with a cable. The cable length is precisely measured when a pipeline anomaly is detected, and a transmitter generates a signal representing the pipeline anomaly location. This measurement provides an accurate positioning system for deploying a mobile receiver, and the receiver identifies the transmitter signal for facilitating precise marking of the pipeline anomaly from the pipeline exterior. Accurate cable measurements are taken by a controller which monitors the magnitude and variations in cable tension and length.
|
