Electricity: measuring and testing – Magnetic – With compensation for test variable
Patent
1986-11-03
1990-07-31
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
With compensation for test variable
324237, G01N 2790, G01R 3312
Patent
active
049453076
ABSTRACT:
A device for detecting irregularities in the surface of an object comprises at least one transducer which is movable relative to the surface of the object and an associated signal-processing unit which receives and processes output signals generated by the transducer. The signal-processing unit includes two electrical circuits, the first circuit providing a signal A which is derived from the output signal from the transducer and the second circuit including an analog shift register to provide a signal B which is derived from the output signal from the transducer and which is time delayed relative to signal A. The signal-processing unit also includes means for combining signals A and B to provide a measuring signal C.
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D. D. Buss et al., "Transversal Filtering Using Charger-Transfer Devices" in IEEE Journal of Solid-State Circuits, vol. Sc-8, No. 2, Apr. 1973.
Edmonds W.
Eisenzopf Reinhard J.
Tornbloms Kvalitetskontroll AB
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