Hall effect shoes speed sensitive?
Hall effect shoes speed sensitive?
(OP)
I am using Hall Shoes to measure flux leakage in longitudinally magnetized tubing (for inspection purposes). I have noticed the signal put out by the hall shoes is much higher when the hall element is moved across the same area of flux leakage at a faster rate of speed. Why is this, and is there any way to regulate it?





RE: Hall effect shoes speed sensitive?
The link below has some useful background on the general technique for inspection. Section 2.5 may give the clue where it states that incorrect choice of direction of magnetisation, or orientation of the hall device, can produce the undesirable effect of the output signal being sensitive to changes introduced by eddy currents induced by the moving magnetic field: these will be proportional to speed of movement over the surface, as in your question.
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RE: Hall effect shoes speed sensitive?