Multi-array coil eddy current probe and switching device

Abstract

The present invention relates to a method for designing safety buses in consideration of common cause failures, in which various design schemes are applied to safety-related buses, and a safety bus connected to an emergency diesel generator and a safety bus connected to an alternate alternating current generator are arranged to be completely separated, thereby considering the common cause failuresof the buses themselves and ensuring the diversity of an emergency power source. Accordingly, even if a common cause failure of the safety bus occurs, the safety bus is designed to supply power to anessential load necessary for a safety shutdown of a powerplant through the alternate alternating current generator, and an effect can be obtained such that as the safety buses connected to the emergency diesel generator and the alternate alternating current generator are separated from each other, the load is divided, thereby reducing the capacity of the alternate alternating current generator.

Description

technical field [0001] The eddy current probe 200 of the array coil of the present invention includes eddy current coils, which are densely arranged in the circumferential direction in the form of two rows, and the interval between the two rows is kept constant, which has the functions of sending and receiving on the circumference The coil 210 is formed in a rectangular shape, and the axial detection coil 220 is formed in a circular shape. The present invention relates to an eddy current probe with multi-array coils and a switching device, which can increase the overlap of eddy current regions in the axial direction for inspection in the circumferential direction, so that by forming the eddy current coils into a rectangular shape, the axial direction The length is longer than the existing circular shape to increase the feed speed of the probe. Background technique [0002] The present invention relates to an array type eddy current probe that can be used to diagnose the int...

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Problems solved by technology

[0025] In addition, the problem to be solved by the present invention is that the switching device in the array type eddy current testing system is designed and manufactured as a single module of the eddy current probe independent of the array coil, so as to reduce the manufacturing cost of the eddy current probe as a consumable and make the slip ring The number of channels is minimized, which saves its manufacturing cost and prevents noise

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