Material condition assessment with spatially periodic field sensors

摘要: Inductive sensors measure the near surface properties of conducting magnetic materials. The generally include parallel winding segments to induce a spatially periodic field in material under test. may provide directionally dependent with measurements made varying orientations sensor respect property variation directions. be thin, conformable that can mounted on test and, for example, monitor crack initiation sensor. A second left air reference measurement, or temperature varied verify response individual sensing elements. Sensors materials order not modify environment is causing stress being monitored. flexible conform shape and difficult access locations such as around fasteners an aircraft. Spatially eddy current scanned across create images absolute beneath