Research on the Calibration of the Electrostatic Probe Based on Digital Image Processing
Yin Feng1, Wang Feng1, Mao Jianxu1, Qiu Yuchang2
1. Hunan University Changsha 410082 China 2. State Key Laboratory for Electrical Insulation and Apparatus, Xi’an Jiaotong University Xi’an 710049 China
Abstract:In the field of high voltage engineering, it is an important subject to measure the surface charge distribution accurately on insulator surface. In this paper, an image processing technique with Wiener inverse filter is introduced to the charge distribution measurement. When an electrostatic probe is used to measure the surface charge on an insulating plate of constant thickness, the measuring system could be regarded as a shift-invariant system. Using 2-dimensional Fourier transformation, the calibration is carried out in the frequency domain. In order to suppress the influence of the noises on the measured signals, Wiener inverse filter is employed. The results show that the calibration time is saved much for this signal processing calibration technique, and the accuracy of calculation also can be improved.
印峰, 汪, 毛建旭, 邱毓昌. 基于数字图像处理技术的绝缘子表面电荷测量标度问题的研究[J]. 电工技术学报, 2009, 24(7): 16-20.
Yin Feng, Wang Feng, Mao Jianxu, Qiu Yuchang. Research on the Calibration of the Electrostatic Probe Based on Digital Image Processing. Transactions of China Electrotechnical Society, 2009, 24(7): 16-20.
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