一种电磁测长方法的研究

Study on an Electromagnetic Length Measurement Method

矿热炉电极升降操作是冶炼的关键操作,实时监测电极长度是该操作的基础。通过磁场传感器测量三相三电极电流产生的磁感应强度,并建立数学模型求得三电极长度,对矿热炉生产安全和资源节约有十分重要的意义。为了测量磁感应强度与电极长度之间的关系,建立三相三电极模型,利用磁场传感器在3个测试点测得电极A、B、C产生的磁感应强度,并根据毕奥-萨伐尔定理求得最佳测试点的位置,列出磁感应强度与电极长度的关系式求解电极长度LA、LB、LC,验证理论可行性。

The electrode lifting operation of mineral furnace is the key operation of smelting.Real-time monitoring of electrode length is the basis of the operation.The magnetic induction intensity generated by the three-phase three-electrode current is measured by the magnetic field sensor and the length of the three-electrode is obtained by establishing a mathematical model,which is of great significance for the production safety and resource saving of mineral furnace.In order to measure the relationship between magnetic induction intensity and electrode length,A three-phase three-electrode model was established.Magnetic induction intensity generated by electrode A,B and C was measured at three test points by magnetic field sensor,and the position of the best test point was obtained according to the Bio-Savart theorem.The relationship between magnetic induction intensity and electrode length is listed and the electrode length LA,Lg and Lc are solved to verify the feasibility of the theory.