利用集磁环检测管道阴极保护电流方法研究
陶嘉楠;黄新敬;陈世利;靳世久
【期刊名称】《传感技术学报》 【年(卷),期】2013(000)010
【摘要】A method that uses magnetic collecting ring to measure cathodic protection current in pipelines was proposed to improve the detection sensitivity. The magnetic collection effect of different magnetic collecting rings on the magnetic flux density produced by 0 . 1 A~1 . 0 A cathodic protection current was experimentally studied and numerically calculated using COMSOL software. The results show that the magnification of the magnetic collecting ring of rolled silicon steel is greater than 20 . A magnetic collecting ring whose size is 3 . 5 times the size of the sensor can guarantee the linearity better than 3%. The system’s sensitivity decreases rapidly while the air gap’s height increases,and seusitivity is affected very little by the length and the corners of the magnetic collecting ring. The size of the gap in the magnetic collecting ring can be used to adjust the sensitivity of the system to avoid sensing saturation. The sensor HMC1001 used here can meet the measurement requirements including the assembly process, resolution,and range.%提出将集磁环用于管道阴极保护电流的测量，以提高检测灵敏度。采用COMSOL软件数值计算并实验研究了多种规格集磁环对0.1 A~1.0 A阴极保护电流的集磁效果，表明冷轧硅钢集磁环集磁放大倍数大于20。
利用集磁环检测管道阴极保护电流方法研究
