PIPELINE INSPECTION.

摘要

A sensor body (50) for use in a pig (10) for determining characteristics of a pipeline wall (21) though which the pig passes includes a circuit board (52) and a single coil (54) wrapped around the circuit board. A microcontroller (58) is mounted to the circuit board and connected to the single coil and configured to induce a waveform on the coil to thereby create an eddy current in the pipeline wall adjacent the sensor body. The microcontroller is also configured to measure changes in a characteristic of the induced waveform on the single coil that correspond to the presence of anomalies on an inside diameter of the pipeline wall. The sensor body also includes a sensor body cover (60) molded about the circuit board, the microcontroller and the single coil. The sensor body cover consists essentially of a wear resistant, non-conductive material that includes a polymer material.