FOCUSED SYMMETRIC PIPE INSPECTION TOOLS

摘要

An electromagnetic sensor for a pipe inspection tool includes a first coil antenna having a wire wrapped about a first core in a first direction, and a second coil antenna axially offset from the first coil and the wire wrapped about a second core in a second direction. A power source is coupled to the wire such that, when excited by the power source, the first coil antenna generates a first magnetic field in a first polar orientation and the second coil antenna generates a second magnetic field in a second polar orientation opposite the first polar orientation.