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近年来,输油气管道内检测技术在我国得到了广泛应用,已成为管道运营者进行完整性管理必不可少的工具。但目前以一维探头为基础的漏磁内检测设备不能准确描述三维的漏磁场,很可能造成对缺陷检测精度和检测可靠性的缺失。为了提高缺陷检测能力和度量准确度,通过三维探头技术还原真实漏磁场情况,从而准确识别与度量管道缺陷。通过搭建静态试验平台,探索探头采集数据与缺陷形状的关系和提离对数据的影响,通过搭建动态试验平台,着重研究速度、提离值、剩磁等因素对漏磁场的影响。
In recent years, the detection technology of oil and gas pipelines has been widely used in our country and has become an indispensable tool for the integrity management of pipeline operators. However, the current one-dimensional probe-based magnetic flux leakage testing equipment can not accurately describe the three-dimensional leakage magnetic field, which may cause the defect detection accuracy and lack of detection reliability. In order to improve the defect detection ability and measurement accuracy, the three-dimensional probe technology is used to reduce the real leakage field to accurately identify and measure the pipeline defects. By setting up a static test platform to explore the relationship between the data collected by the probe and the shape of the defect and the effect of lift-off on the data, the dynamic testing platform was set up to study the influence of speed, lift-off value and residual magnetization on the leakage field.