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Technical Discussions
Catalin Mandache
Catalin Mandache
16:38 Feb-19-2010
eddy current probe design

This is for the eddy current experts on this board.
In a ‘sliding’ probe configuration (transmit-receive side by side coils), which coil is more likely to contain a ferrite core: the driver or the pick-up?
My explanation is two folded:
- if the driver contains the ferrite core – the field would provide better penetration, but less spread, so less eddy current distribution and, therefore, a lower field to be picked-up by the receiver.
- if the pick-up contains the ferrite this will create a lower reluctance path for the field lines, which is a good thing, but it would increase the pick-up diameter, and, therefore – lowering the resolution.

I am looking forward to reading your opinions.

Thank you.
Catalin

 
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