Eddy current sensors

Details Eddy current sensors Eddy current sensors

G - Physics

01

P

G01P 13/02 (2006.01) F01D 17/06 (2006.01) G01P 3/49 (2006.01) G01R 33/02 (2006.01) G01V 3/08 (2006.01)

Patent

CA 2488967

An inductive eddy current sensor, for use for example for measuring the speed of a turbine by detecting the passage of turbine blades (21) past a probe incorporating the sensor, includes a magnet (23) positioned so that the blades (21) pass through the flux pattern generated by the magnet (23). At least one pick-up coil (28) devoid of a core of soil magnetic is positioned alongside the magnet to pick up signals generated by eddy currents generated in the turbine blades as they cut through the flux pattern, without thereby altering the flux pattern. In a modified arrangement, the pick up coil surrounds the magnet, again without affecting the flux pattern.

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