“静电场”模拟和“电流场”实验装置研发

开发的电流场实验装置采用水做为媒质,由于水的电阻率比铁板大得多,不再需要可输出大电流的稳压源,使用实验室里常见的电压源就行.另外,新实验装置还可以完成一些静电场模拟实验,如同轴电缆和偏心圆柱导体模型等.利用新实验装置进行了实验测试,将实验测量值与有限元分析软件ANSYS的计算值进行对比.结果表明,新实验装置在当前实验室环境下是可行的.与传统实验装置相比,新实验装置更加灵活、方便,能提供多种测量模型,适合学生进行开发性实验.

Research and Development of the Experimental Platform to Measure Current Field and Simulate Electrostatic Field

The experiment of current field measurement is important in"Electromagnetic field"course.In the past,a ’L’ iron plate was used because its physical model is clear.However,since the iron’s resistivity is very small,a regulated power supply with high current was needed.Since water whose resistivity is much bigger is used in the new equipment now,common voltage source is used instead of the power supply with high current.Besides,some electrostatic field measures can also be done with the new equipment.Some metrical data have been obtained from the new experimental platform.A comparison of the metrical data with computed data by the finite element software ANSYS shows that the new experimental platform is feasible.Compared with the traditional equipment,the new one is more flexible and convenient,suitble for a variety of measurement models.