Aviation metal small diameter tube defect internal inspection probe and detection method

Abstract

The invention discloses an aviation metal small diameter tube defect internal inspection probe and a method. The probe includes a disc coil and a circumferential rectangular coil group array that arefixed on a photosensitive resin coil skeleton together. The disc coil and the photosensitive resin coil skeleton are coaxial, rectangular coils in the circumferential rectangular coil group array areevenly arranged along the circumference, adjacent rectangular coils are in contact with each other, and the disc coil passes perpendicularly through the air field surrounded by each rectangular coil;the winding groups of the disc coil and the rectangular coils are respectively obtained by winding of three-core-wire groups, wherein each three-core-wire group comprises three side-by-side same-diameter copper core enameled wires; the winding group of each coil comprises three independent coils, a middle coil is an excitation coil, two side coils are detection coils, the two detection coils are connected in differential arrangement, and difference of induced voltage signals picked up by the two detection coils is taken as an output signal. The present invention also provides the detection method of the probe, and the detection method can detect aviation metal small diameter tube defects quickly and highly accurately, and has important engineering application value.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and relates to an internal detection probe and a detection method for defects in aviation metal small-diameter tubes. Background technique [0002] At present, metal pipe fittings widely exist in aerospace / aircraft structures such as airplanes and rockets. The main purpose of aerospace metal small diameter pipes (such as aluminum alloy pipes, copper pipes, etc.) The specific stiffness can effectively reduce the weight of the aircraft structure, improve flight performance and increase economic benefits. [0003] Due to the complex service environment, small-diameter aviation metal tubes are prone to small-scale defects such as cracks and pitting corrosion. Many aerospace accidents are caused by small-scale defects on the surface or inside of aviation metal small-diameter tubes, which lead to the failure of key components of the aircraft and damage aircraft structural integrity. T...

AI Technical Summary

Problems solved by technology

At present, there are few studies on pulsed eddy current detection probes and detection methods for small-sized defects in aviation metal small-diameter tubes, and there are few pulsed eddy current internal detection probes and detection methods that can realize accurate, rapid positioning and quantitative evaluation of small-diameter aviation metal tube defects

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