Surface-Mounted Eddy-Current Sensors for On-Line Monitoring of Fatigue Tests and for Aircraft Health Monitoring

Author:  Neil Goldfine, Darrel Schlicker, Andrew Washabaugh
Source:  NASA/FAA/DoD Conf. Aug 1998
Doc ID:  1998008
Year of Publication:  1998
Abstract:  
A new surface mountable eddy-current sensor, called the new Meandering Winding Magnetometer Array (MWM-Array) has demonstrated the bapability to monitor early stage fatigue damage, crack initiation and growth. This new capability is suitable for monitoring of on-line fatigue tests for coupons and complex components, as well as for monitoring of difficult-to-access locatin on military and commercial aircraft. The sensor is thin and light weight. It can be surface mounted like a strain gage, but does not require an intimate mechanical bond, permitting use of compliant adhesives to improve durability.