姚万鹏,吴承昊,李强,齐建涛,唐晓,李焰.直管道电场指纹法有效检测区范围的数值模拟[J].装备环境工程,2019,16(11):30-35. YAO Wan-peng,WU Cheng-hao,LI Qiang,QI Jian-tao,TANG Xiao,LI Yan.Numerical Simulation on Effective Detection Region of Field Signature Method-straight Pipeline[J].Equipment Environmental Engineering,2019,16(11):30-35. |
直管道电场指纹法有效检测区范围的数值模拟 |
Numerical Simulation on Effective Detection Region of Field Signature Method-straight Pipeline |
投稿时间:2019-04-16 修订日期:2019-05-02 |
DOI:10.7643/issn.1672-9242.2019.11.006 |
中文关键词: 电场指纹法 管道腐蚀检测 有效检测区 数值模拟 |
英文关键词:field signature method pipe corrosion detection effective detection region numerical simulation |
基金项目:国家自然科学基金(41676071);中国石油大学(华东)自主创新科研计划(18CX05021A) |
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中文摘要: |
目的 确定电场指纹法应用于直管道时的有效检测区大小。方法 采用COMSOL多物理场数值模拟的方法,研究直管道模型在电场指纹检测时的电场分布特征,并探讨电流输入方式、电源电极尺寸、管道尺寸等因素对有效检测区的影响。结果 双路电流输入方式能够获得更大的有效检测区,可提高电流利用率及检测效率。有效检测区大小受电源电极尺寸、管道壁厚变化的影响极小,受管道公称直径影响较大。有效检测区与电源电极的最小间距固定,约为管道公称直径的1.5倍。结论 确定了电场指纹法应用于直管道时有效检测区的大小,为电场指纹法的管道检测规范的制定提供了科学依据。 |
英文摘要: |
Objective To determine the size of the effective detection region when the electric field fingerprint method is applied to the straight pipeline. Methods The COMSOL multi-physics numerical simulation method was adopted to study the electric field distribution characteristics of the straight pipeline model in the detection of FSM and discuss the influences of current input mode, power supply electrode size, pipeline size and other factors on the effective detection area. Results The double-channel current input method can obtain a larger effective detection region, improving the current utilization rate and detection efficiency. The size of the effective detection region was little affected by the size of the power supply electrode and the change of the pipe wall thickness, but was greatly affected by the nominal diameter of the pipeline. The minimum distance between the effective detection region and the power electrode was fixed, which was about 1.5 times of the nominal diameter of the pipe. Conclusion The side of the effective detection zone size can be determined with the electric field fingerprint method, which provides a scientific basis for the establishment of the pipeline detection specification of the electric field fingerprint method. |
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