Eddy current testing system for pipeline nondestructive testing

Abstract

The invention discloses an eddy current testing system for pipeline nondestructive testing, which belongs to the technical field of nondestructive testing, and comprises a data processing unit, a first signal conditioning unit, a second signal conditioning unit and a detection probe, the detection probe comprises an excitation coil, a receiving coil and a passive resonance coil, and the passive resonance coil is arranged between the excitation coil and the receiving coil. According to the invention, the detection does not need to add additional magnetization treatment equipment, so that the system volume is greatly reduced, the requirement of the detection system on the internal cleanliness of the pipeline is reduced, the pipeline passing ability of the detection system is improved, and the cost overhead of the system is greatly reduced; the passive resonance coil is introduced between the excitation coil and the receiving coil, so that coupling between the excitation coil and the receiving coil can be enhanced, the energy transmission efficiency is remarkably improved, the sensitivity of the detection probe is further improved, the probe can accurately detect pipeline defects at a higher lift-off height, and the defect detection capacity of the probe is improved.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to an eddy current testing system for non-destructive testing of pipelines. Background technique [0002] Pipeline transportation is considered to be one of the safest and most economical transportation methods. During the operation and use of the pipeline, the pipeline body often has defects as time goes by. In the past few decades, accidents caused by pipeline defects have caused a large number of casualties and economic losses around the world. In order to detect pipeline defects in advance and eliminate potential safety hazards, pipeline companies around the world carry out periodic inspections on pipelines, discover and repair pipeline defects in time, and ensure safe and reliable operation of pipelines. [0003] At present, methods such as magnetic flux leakage testing and ultrasonic testing are widely used in pipeline defect detection, and have become an imp...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problem of low coupling between the excitation coil and the receiving coil of the existing eddy current detection probe, which leads to low sensitivity and lift-off height of the detection probe, and provides an eddy current detection system for non-destructive detection of pipelines

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