椭球计测定场强的精确计算

Exact Calculation for Measuring Electric Intensity with Ellipsoid Gauge

依据极化的各向异性 ,考查电场与场强计金属椭球感生电偶极矩间的力矩 ,建立椭球在待测电场中的非线性振动方程 ,计算与振幅有关的振动周期 ,得出用金属椭球场强计测量电场强度的精确计算公式。分析振幅参数对实验计算的影响 ,给出确定振幅的实验方法。并同按线性振动处理的计算结果进行对比 ,反映考虑非线性振动因素对计算精度的提升作用。

Based upon the anisotropy of electric polarization,the nonolinear oscillation equation of the ellipsoid in electric field is constructed by considering the rotative moment between electric field and the induced dipole moment on metallic ellipsoid of field intensity gauge. The oscillation period relative to the amplitude and electric intensity is calculated.An expression of exact computation to measure the electric field intensity is achieved.The impact of the amplitude parameter upon the experiment calculation is analyzed and the method to determine the amplitude is contributed.A contrast to the computed resuls by means of linear oscillation is undertaken to show the raising effect to the calculation precision by considering nonlinearity in oscillation.