Eddy current probe with differential magnetic field sensors
Rosado, L. S.
; Cardoso, F. A. C.
Instituto de Telecomunicações, INESC-ID Instituto de Engenharia de Sistemas e Computadores - Investigação e Desenvolvimento, Instituto de Engenharia de Sistemas e Computadores - Microsistemas e Nanotecnologias
Invention Title: Eddy current probe with differential magnetic field sensors
Patent Nr.: PCT/IB2015/050964
Type: Patent
Regional Coverage: PCT
Priority Date: 07-02-2014
Filing Date: 09-02-2015
Country: Portugal
Abstract
An eddy current probe using magnetic field sensors in the resulting magnetic field readout is provided. At least two sensors are configured to measure the same magnetic field component but at different locations separated by an arbitrary distance. These sensors are 5 simultaneously electrically biased at to the same current level leading to similar voltage across each sensor. A differential amplifier is configured to amplify the difference between the voltages across the two sensors.
