Development of GMR eddy current sensors for high temperature applications and imaging of corrosion in thick multi-layer structures

Proceedings of SPIE - The International Society for Optical Engineering

Volumn 5392, Issue , 2004, Pages 247-255

  Bajjuri, Sandeep ^a   Hoffman, Jochen ^b   Siddoju, Ajay ^a   Meyendorf, Norbert ^a  

^a UNIVERSITY OF DAYTON RESEARCH INSTITUTE   (United States)

^b S and K Technologies   (United States)

Author keywords

Conductivity measurement; Deep penetrating probes; GMR; Linear regression algorithm; Multi frequency eddy current; Temperature stable probes

Indexed keywords

ACOUSTIC NOISE; AIRCRAFT; AIRFRAMES; CORROSION; EDDY CURRENTS; HIGH TEMPERATURE OPERATIONS; MAGNETIC FIELDS; MULTILAYERS; NONDESTRUCTIVE EXAMINATION; RESISTORS;

EDDY CURRENT SENSORS; GIGANTIC MAGNETO RESISTORS (GMR); THICK MULTI-LAYER STRUCTURES;

SENSORS;

EID: 5444232160     PISSN: 0277786X     EISSN: None     Source Type: Conference Proceeding    
DOI: 10.1117/12.539944     Document Type: Conference Paper

References (7)

1. M.Disqué, R.Becker, "Mehrfrequenz-Wirbelstromprüfung geschichteter Strukturen aus Aluminium zum Nachweis und zur Quantifizierung verdeckter Korrosion", Material and Corrosion 49, 1-8 (1998).
2. G.A. Prinz, "Spin polarized transport," Phys. Today, 1995, 48:58
3. NVE. Corp, "GMR Sensors Data Book" October 2002, www.nve.com
4. Carl H. Smith and Robert W. Schneider, "GMR and SDT Sensors and Arrays for Low-Field Magnetic Applications," expo00.pdf**
5. Siddoju. A, "Multi-Frequency Eddy Current System with GMR-based Eddy Current Probe for High Temperature Electrical Conductivity Measurement", Masters Thesis, University of Dayton, Mar 2004.
6. Siddoju. A, Khur. S, Meyendorf. N, "GMR based Eddy current probes for high temperature applications", Nano & Micro-material testing, SPIE proceedings, Mar (2003).
7. Buzz Wincheski and Namkung, "Deep Flaw Detection with Giant Magneto Resistive (GMR) Based Self-Nulling Probe", NASA Langley Research Center Hampton, VA 23681.