作者：冯一璟¹, 张来斌², 郑文培², 刘海涛¹

作者单位：1. 中国科学院电工研究所，北京 100190;
2. 中国石油大学（北京），北京 102249

关键词：ACFM;管道内检测;轴向缺陷;数值模拟;实验测试

摘要：

交流电磁场无损检测（ACFM）作为一种新兴的无损检测技术，具有较高的检测精度和评估金属缺陷尺寸的能力。该文提出一种基于交流电磁场的管道内检测探头，对该探头进行数值模拟及提离距离参数优化，建立激励线圈和传感器沿缺陷长度方向运动的参数扫掠模型，模拟油气管道内检测探头对缺陷的检测扫描过程，得到磁场沿缺陷长度方向分布的数值解；建立与仿真模型一致的实验条件，进行检测实验，测试探头的检测能力，对检测信号进行了经过EMD降噪处理，评估探头的定量检测性能。该文的研究结果表明该检测探头对管道内表面的轴向缺陷检测效果较好，可为管道缺陷早期缺陷预警及金属结构物长期安全服役提供技术借鉴。

Simulation and testing of a novel probe based on alternating current field measurement
FENG Yijing¹, ZHANG Laibin², ZHENG Wenpei², LIU Haitao¹
1. Institute of Electrical Engineering of the Chinese Academy of Sciences, Beijing 100190, China;
2. China University of Petroleum(Beijing), Beijing 102249, China
Abstract: Alternating current field measurement (ACFM), as a new non-destructive testing technology, has high inspection accuracy and the ability to assess the size of metal defects. In this paper, an in-line inspection probe based on ACFM is proposed. The probe was numerically simulated and the lift-off distance parameter was optimized. A parametric sweep model of the excitation coil and magnetic sensor moving along the length of the defect was established, and the detection and scanning process of the detection probe in the oil and gas pipeline was simulated to obtain the numerical solution of the distribution of the magnetic field along the length of the defect. The inspection experiment was carried out, the inspection ability of the probe was tested, the detection signal is processed by EMD noise reduction, and the quantitative inspection performance was evaluated. The research results in this paper show that the probe has a good effect on the inspection of axial cracks on the inner surface of the pipeline, and it can also provide technical reference for early warning of pipeline cracks and long-term safe service of metal structures.
Keywords: ACFM;in-line inspection;axial crack;numerical simulation;experimental test
2022, 48(11):113-119  收稿日期: 2021-04-15;收到修改稿日期: 2021-07-06
基金项目: 国家自然科学基金资助项目（51404283）；国家采油装备工程技术研究中心开放基金资助项目(ZBKJ2021-Z-01)
作者简介: 冯一璟（1992-），女，湖北荆州市人，助理研究员，博士，研究方向为电磁无损检测
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