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Title
Vorrichtung zur zerstoerungsfreien Werkstoffpruefung
Date Issued
1986
Author(s)
Becker, R.
Regnerie, L.
Ruediger, R.
Patent No
1978-2814125
Abstract
DE 2814125 C UPAB: 19930901 A clock pulse generator coupled to a multiplexer, produces one or more DC voltages to control a v.c.i. This oscillator has a variable amplitude sine wave output which is fed to a number of eddy current probe coils for workpiece testing. Currents are induced in pick-up coils and fed to multiplier circuits, which are also supplied with constant amplitude sine and cosine outputs from the oscillator, to generate real and imaginary current components. The instantaneous measured impedances are stored in a memory circuit to provide a correction factor for subsequent measurements.
Language
de
Patenprio
DE 1978-2814125 A: 19780401