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Nondestructive Evaluation (NDE) Technology Initiatives Program (NTIP). Delivery Order 0030: Magnetoresistive Sensors for Eddy Current Imaging Nondestructive Evaluation (NDE)

机译:无损评估(NDE)技术倡议计划(NTIp)。交货单0030:用于涡流成像无损评估(NDE)的磁阻传感器

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Development and performance of a 64-element imaging array for use in eddy current NDE for aircraft using anisotropic magnetoresistive sensors (AMR) is described and discussed. Among the design issues are flaw field modeling, excitation current configuration, and orientation and configuration of the sensors themselves. The array can rapidly find cracks of the order of 0.2 inch under 0.3 inch or more of metal. This is a good improvement compared to conventional eddy current means, as it enables the scanning of large areas of aircraft surface, thus potentially eliminating the necessity to examine each fastener hole individually by hand. The intention is to mount the array on the MAUS platform for depot inspections, and possibly some fieldwork.

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