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
CN104573702AInactive Publication Date: 2015-04-29CHANGSHA ZHONGZHI ELECTRICAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHANGSHA ZHONGZHI ELECTRICAL TECH
Publication Date
2015-04-29
Estimated Expiration
Not applicable · inactive patent

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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.
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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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