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本文根据实测数据,阐述了大型铝电解槽外部的磁场分布及其特征,发现其最大磁场强度高达700高斯以上。同时着重研究了在强磁场中进行非电量电测的可能性。 作者们发现:在强磁场中进行电测,当传感器开始磁化时,输出信号偏高,其偏高值与磁场强度有关,当磁场强度20高斯时为3.6％,磁场强度400高斯时为31.8％;当磁化达到饱和后,输出信号可以趋近于正常值,其误差约1％;磁化过程所需时间与磁场强度有关,磁场强度20高斯时,磁化时间约需10分钟;磁场强度400高斯时,磁化时间约需1小时;在不同强度的磁场中,对同一载荷量变化进行电测的结果完全一致。 这些发现是极为令人鼓舞的,因为它表明:在强磁场中进行非电量电测是完全可能的,而且无需采用专门的防磁措施。 本文还从理论上对上述结果进行了解释。同时提出了在强磁场下进行电测时所应注意的事项。
Based on the measured data, this paper describes the magnetic field distribution and characteristics outside the large aluminum reduction cell and finds that the maximum magnetic field strength is above 700 Gauss. In the meantime, the possibility of conducting non-electric measurement in a strong magnetic field is emphatically studied. The authors found that: in the strong magnetic field for electrical measurements, when the sensor magnetization, the output signal is high, the high value of the magnetic field strength, when the magnetic field strength of 20 Gauss was 3.6%, the magnetic field strength of 400 Gauss was 31.8% ; When the magnetization reaches saturation, the output signal can approach the normal value, the error of about 1%; magnetization process time and the magnetic field strength, magnetic field strength 20 Gauss, the magnetization time of about 10 minutes; magnetic field strength of 400 Gauss , Magnetization time takes about 1 hour; in the magnetic field of different intensities, the same load changes in the electrical measurement results are exactly the same. These findings are extremely encouraging as it shows that it is entirely possible to conduct non-electrical measurements in a strong magnetic field without the need for special magnetic protection. This article also theoretically explained the above results. At the same time put forward in the strong magnetic field should be noted when measuring electrical matters.