SIGNAL PROCESSING OF MULTI-CHANNEL EDDY CURRENT SCANNERS

Presents the principles of signal processing with multi-channel eddy current scanners, which are based on differential probes. Presents the principle of elimination of the trend due to the air gap variation. Considered median filtering and filtering by the accumulation. Presents the principle of filtering of the signals from the constructive elements of the controlled object. Marked disadvantages of scanners.

Authors: A. V. Grabovskiy

Direction: Instrument Engineering and Information-Measurement Technologies

Keywords: Eddy current testing, multi-channel scanners, digital signal processing, filtering, the optimum detector in de-fectoscopy

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