On-line measurement system of high voltage insulator based on binocular stereo vision

He Wenjun; Wang Jiake; Fu Yuegang; Mo Shijun

doi:10.5768/JAO201839.0403003

Journal of Applied Optics > 2018 > 39(4): 528-535. > DOI: 10.5768/JAO201839.0403003

He Wenjun, Wang Jiake, Fu Yuegang, Mo Shijun. On-line measurement system of high voltage insulator based on binocular stereo vision[J]. Journal of Applied Optics, 2018, 39(4): 528-535. DOI: 10.5768/JAO201839.0403003

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On-line measurement system of high voltage insulator based on binocular stereo vision

School of Opto-electronic Engineering, Changchun University of Science and Technology, Changchun 130022, China

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Received Date: March 03, 2018
Revised Date: March 26, 2018

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Abstract

Abstract

In the anti-pollution flashover work of the state grid system, it is impossible to measure the creepage distance of electrical equipment online currently. In view of this situation, we developed an on-line measurement system of creepage distance for high voltage insulator based on binocular stereo vision, proposed a method of using a conical off-axis mirror to produce the linear structured light. We discussed the feasibility of two ways to solve the interference problem of strong sunlight, one way used narrowband filters to enhance the contrast ratio of laser line in images, while the other way processed the images with adaptive threshold segmentation and feature point extraction by combining the maximum interclass variance method with the grayscale gravity method. After calibrating the system, the measurement accuracy for the creepage distance of high voltage insulators was tested. Experimental results show that the maximum relative error is 1.45% and the average relative error is 0.69%. It has been successfully applied to the on-line measurement of the creepage distance of various insulators in 110 kV substations.
- optical instruments,
- binocular stereo vision,
- high voltage insulator,
- on-line measurement

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