In-service inspection system and method for storage tank floor based on magnetic horizontal shear wave

Abstract

The invention discloses a storage tank baseplate in-service inspection system and method based on magnetic horizontal shear waves. A multi-channel signal controlling and processing module in the storage tank baseplate in-service inspection system consists of a multi-channel excitation signal generating unit, a multi-channel echo signal processing unit and a time sequence control unit; an upper computer is connected with the multi-channel signal controlling and processing module; the multi-channel excitation signal generating unit is connected with a power amplification module; the power amplification module is connected with an transducer array to input an excitation signal subjected to power amplification and time sequence adjustment into the transducer array; the transducer array is connected with a preposed amplification module; the preposed amplification module is connected with the multi-channel echo signal processing unit; the multi-channel echo signal processing unit is connected with the upper computer and uploads a processed echo signal onto the upper computer. The storage tank baseplate in-service inspection system can finish complete detection of a guide wave covered area through one-time excitation, and the operation efficiency of the adopted imaging algorithm is far higher than that of the frequently-used guide wave time domain imaging algorithm.

Description

technical field [0001] The invention belongs to the field of ultrasonic guided wave measurement and non-destructive testing of pressure vessels, and in particular relates to a system and method for in-service detection and imaging of corrosion defects on storage tank bottom plates by using magnetically induced horizontal shear waves. Background technique [0002] With the development of the petroleum industry, storage tanks, as common storage equipment in production and transportation, are being used continuously. Petrochemical products are generally stored in storage tanks. During long-term service, the bottom plate of the storage tank is corroded due to various factors, resulting in leakage of the final storage medium and structural failure. According to the analysis of relevant data, among the corrosion failures of storage tanks, the corrosion failure of the bottom plate of storage tanks accounts for 80%. At present, countries all over the world are paying more and more ...

AI Technical Summary

Problems solved by technology

However, this method requires high delay accuracy and is complex to implement. It needs multiple shots to move the focus within the detection range during detection, and the detection efficiency is low.

[0007] In the existing technology, for the ultrasonic guided wave detection of the bottom plate of the storage tank, there is no fast and efficient detection method with a large detection range, accurate defect location and high precision.

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