- Conference date: 30 July-4 August 2006
- Location: Portland, Oregon (USA)
A giant magneto‐resistive (GMR) sensor placed inside a coil has been used for same side eddy current measurements on metallic plates. Magnetic fields from eddy currents generated in these metallic plates by excitation of the coil, are detected by the GMR sensor. The signal excitation and detection is accomplished using a lock‐in amplifier which allows independent measurement of the phase and magnitude. The sensor configuration has been used to detect notches. Phase and magnitude images acquired with this sensor configuration are compared with the images obtained using the coil only.
- Image sensors
- Magnetic field sensors
- Giant magnetoresistance
- Magnetic fields
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