| 摘要 |
An apparatus for pipeline inspection is provided. The apparatus comprising a body comprising a longitudinal axis a sensor unit in association with the body, wherein the sensor unit comprises an array of ultrasonic sensors configured to inspect a pipe wall and a skid comprising an outer surface configured to run adjacent to, or in contact with, the pipe wall, wherein the array of ultrasonic sensors are arranged at a stand off from the outer surface of the skid, and a mechanism configured to bias the outer surface of the skid into contact with the pipe wall, and to move the sensor unit between a first radial position and a second radial position in response to changes in pipe diameter.
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