Pipeline ultrasonic guided wave corrosion monitoring device and method

Abstract

The invention discloses an ultrasonic guided wave device and method for monitoring corrosion of a pipeline. The device comprises an ultrasonic guided wave energy converter, a current-limiting module, a super capacitor set, a charging module, a triggering module, a synchronizing signal receiving and ultrasonic guided wave receiving and dispatching module, wherein the ultrasonic guided wave energy converter is used for collecting an ultrasonic guided wave echo signal which is divided into a reference signal and a sample signal, then DAC curvature correction, extraction of signal maximum value, cubic spline curve fitting, calculation for spline curve coefficient and extraction of an enveloping signal are successively carried out, the reference signal and the sample signal are subjected to an enveloping subtraction calculation, the difference value power operation is performed, and further the monitoring data is acquired through quantitative analysis and trend analysis. The invention provides the device capable of providing constant controllable bias magnetic field; the quantitative data of the pipeline corrosion signal and the corrosion condition are acquired through the analysis operation on pipeline corrosion monitoring data; and the monitoring for the pipeline corrosion is highly-efficient and accurate.

Description

technical field [0001] The invention relates to a monitoring device and method, in particular to a pipeline ultrasonic guided wave corrosion monitoring device and method. Background technique [0002] Pipeline is a medium transportation carrier widely used in civil and industrial fields, and the safe and reliable operation of pipelines is also the focus of work of various industries and departments. Especially in recent years, it is often reported that pipeline leakage has caused major economic and property losses, and even threatened life safety. Therefore, it is of great significance to monitor and feed back the operation status of pipelines in real time. [0003] Ultrasonic guided wave is a kind of ultrasonic wave with lower frequency and longer propagation distance, so the detection efficiency is high. An ultrasonic guided wave transducer can detect an area of ​​tens to hundreds of meters, which greatly improves the detection coverage. With the gradual maturity of ultr...

AI Technical Summary

Problems solved by technology

However, the ultrasonic guided wave signal is complex, and the amount of conventional periodic inspection data is too small, which requires a lot of experience to analyze the signal, and the obtained inspection data cannot reflect the corrosion trend of the pipeline in real time

For some conventional monitoring methods, due to the small monitoring area, it is difficult to cover a wide range of pipelines, and it is easy to miss detection

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