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Method for automatically identifying sulfur hexafluoride pressure instrument image

A technology of pressure instrument and sulfur hexafluoride, which is applied in the direction of character and pattern recognition, instruments, computer parts, etc., can solve the problem of few methods of pattern recognition, achieve convenient remote monitoring, high engineering practical value, and reduce operation and maintenance cost effect

Inactive Publication Date: 2015-04-29
CHANGSHA ZHONGZHI ELECTRICAL TECH
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Problems solved by technology

At present, there are many methods for instrument image recognition, but there are few methods for pattern recognition of specific instruments such as sulfur hexafluoride pressure gauges, so it is very important to study a pattern recognition technology for sulfur hexafluoride instrument image pointer reading. practical value

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  • Method for automatically identifying sulfur hexafluoride pressure instrument image
  • Method for automatically identifying sulfur hexafluoride pressure instrument image
  • Method for automatically identifying sulfur hexafluoride pressure instrument image

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Embodiment Construction

[0025] The specific operation process of identifying the sulfur hexafluoride pressure instrument will be described below in conjunction with the accompanying drawings.

[0026] A. Image acquisition: The instrument monitoring equipment acquires the current instrument image and sends it back to the computer through the transmission device.

[0027] B. Perform grayscale transformation on the acquired image, as shown in Figure 3(a).

[0028] C. Perform binary processing on the grayscale image, optimize the image through the differential algorithm, and finally perform median filtering on the image to obtain Figure 3(b).

[0029] D. Then perform expansion processing, grayscale inversion and image thinning on the image, and finally use Hough matrix transformation to display the position of the instrument pointer point and the pointer position of the scale end point, as shown in Figure 3 (c) and 3 (d) The cross indicates the current position of the pointer and the end point of the sc...

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Abstract

The invention discloses a method for automatically identifying a sulfur hexafluoride pressure instrument image. The method comprises the following steps: an image obtained through instrument video monitoring is pretreated and converted into a gray image; the OTSU is utilized to find a proper threshold value of the image, a target pointer in the instrument image is distinguished from a disc background; sobel operator edge detection is performed on the gray image, and then Hough Transform is utilized to obtain the coordinate and radius of a central point of a circular area of the image; according to the features of the instrument image, the reference point position and the reference terminal point coordinate of a dial plate are obtained; according to the obtained coordinate parameters, the deflection included angel of the pointer is calculated, and the pointer read is calculated by combining the reference point position of the dial plate to realize the automatic identification of instrument image read. According to the invention, the pointer read of the instrument can be accurately and rapidly identified, a template image database is not needed to be established in advance, which is remarkably different from other image identification technologies, and automatic read identification of the image pointer of the sulfur hexafluoride pressure instrument can be realized through feature separation and identification of the image.

Description

technical field [0001] The invention relates to a method for automatic recognition of instrument images in electric power systems, in particular to the application of a computer image processing technology in the field of automatic recognition of GIS sulfur hexafluoride pressure instrument images. Background technique [0002] In power transmission and transformation systems, sulfur hexafluoride gas, as an important insulating medium, is often used in high-voltage and medium-voltage sulfur hexafluoride load switches, combined electrical cabinets (GIS) and other electrical equipment, and is measured by pressure gauges. The pressure of the insulating medium sulfur hexafluoride is monitored to ensure the insulation safety of the equipment. [0003] At present, most of the meter readings are collected manually on-site, or by installing a fixed camera to collect images and send them back to the computer for manual reading. The above data collection method requires a large number...

Claims

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Application Information

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IPC IPC(8): G06K9/60
CPCG06V10/28G06V10/44G06V2201/02G06F18/21
Inventor 吴志强何海林其他发明人请求不公开姓名
Owner CHANGSHA ZHONGZHI ELECTRICAL TECH
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