A Composite Sensor Array and Defect Quantification Method for Ultrasonic Internal Detection of Pipeline Defects

Abstract

The invention discloses a pipeline defect ultrasonic internal detection composite sensor array and a defect quantification method. The composite sensor array comprises: two columns of straight probe arrays S1 and S3 uniformly distributed along the inner surface of a pipeline, two columns of axial inclined probe arrays S2 and S4, and two columns of circumferential inclined probe arrays S5 and S6, wherein the probe arrays are distributed according to the manner of the radial probe array S1(arrow)the axial inclined probe array S2(arrow)the radial probe array S3(arrow)the axial inclined probe array S4(arrow)the circumferential inclined probe array S5(arrow)the circumferential inclined probe array S6, each column of the probes are uniformly distributed, and the number of the probes is determined by the inner diameter of the detected pipeline. The invention further discloses a method for quantifying the three-dimensional parameters of a defect according to the spatial distribution orientations of the sensors and the signals received by each sensor. With the apparatus and the method of the present invention, various defects having different types on the pipeline wall can be effectively detected, and particularly the micro defect can be detected and the quantified information can be provided when passing through the pipeline in one time.

Description

Technical field [0001] The invention relates to a composite sensor array for ultrasonic internal detection of pipeline defects and a defect quantification method, belonging to the technical field of nondestructive detection. The array can detect almost all types of defects on the pipe wall and provide defect quantitative parameter information; it is particularly suitable for the detection of small defects (cracks, etc.) on the pipe wall and the acquisition of three-dimensional quantitative information. Background technique [0002] The ultrasonic internal detection technology of pipeline defects is different from the external ultrasonic detection technology of pipelines. It uses an ultrasonic sensor array placed inside the pipeline, also known as a smart pig, which scans and detects defects in the pipeline when passing through the pipeline at one time and provides quantitative parameters of the defect information. The advantage of this method is that it can adapt to occasions th...

AI Technical Summary

Problems solved by technology

[0005] At present, the technologies that use ultrasound to detect internal defects in pipelines have the problem that there are few types of defects detected, and small defects cannot be effectively detected, let alone quantitative parameter information for small defects.

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