CN110866895A - Method for detecting color difference quality of hot-galvanized layer of power transmission and transformation steel framework - Google Patents

Method for detecting color difference quality of hot-galvanized layer of power transmission and transformation steel framework Download PDF

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CN110866895A
CN110866895A CN201911020053.9A CN201911020053A CN110866895A CN 110866895 A CN110866895 A CN 110866895A CN 201911020053 A CN201911020053 A CN 201911020053A CN 110866895 A CN110866895 A CN 110866895A
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color difference
hot
power transmission
steel framework
galvanized layer
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CN110866895B (en
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边美华
彭家宁
张兴森
卢展强
李君华
刘桂婵
梁世容
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Electric Power Research Institute of Guangxi Power Grid Co Ltd
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00Image analysis
    • G06T7/0002Inspection of images, e.g. flaw detection
    • G06T7/0004Industrial image inspection
    • G06T7/0006Industrial image inspection using a design-rule based approach
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T7/00Image analysis
    • G06T7/90Determination of colour characteristics
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00Indexing scheme for image analysis or image enhancement
    • G06T2207/10Image acquisition modality
    • G06T2207/10024Color image
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
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    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications

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  • Coating With Molten Metal (AREA)

Abstract

The invention belongs to the technical field of power equipment detection, and particularly relates to a method for detecting the color difference quality of a hot-galvanized layer of a power transmission and transformation steel framework. The method comprises the following specific steps: (1) visually determining a region with large color difference deviation of the power transmission and transformation steel framework; (2) carrying out color difference evaluation index detection on a hot-galvanized layer of the power transmission and transformation steel framework; (3) and evaluating according to the evaluation index result of the color difference of the hot galvanized layer of the power transmission and transformation steel framework. The invention determines the key indexes of the chromatic aberration detection of the power transmission and transformation equipment: the color difference value of the hot galvanizing layer, the area of the color difference area of a single hot galvanizing layer and the boundary distance between the color difference areas of the adjacent hot galvanizing layers. The problem that the overall appearance of the project is influenced due to different acceptance and detection standards caused by the fact that the current standard of the color difference of the zinc coating has no specific evaluation value is solved. By adopting the method, the inspection and acceptance of the color difference quality of the hot-galvanized layer of the power transmission and transformation steel framework can be rapidly carried out, and the overall impression of project engineering is improved.

Description

Method for detecting color difference quality of hot-galvanized layer of power transmission and transformation steel framework
Technical Field
The invention belongs to the technical field of power equipment detection, and particularly relates to a method for detecting the color difference quality of a hot-galvanized layer of a power transmission and transformation steel framework.
Background
The hot dip coating technique is a method for protecting the anticorrosion coating layer of metal, which is to be dipped in the molten metal or alloy to be coated, and then the surface of the substrate is taken out after the substrate is kept in contact with the molten metal for a period of time, so that the substrate is adhered with a layer of uniform and smooth metal coating layer firmly combined with the substrate. The existing national standard and the line standard detection items are all four aspects of the appearance, the thickness, the uniformity and the adhesive force of the zinc coating. The appearance is mainly checked by visual inspection, the surface is required to be continuous and complete, the defects of acid washing, plating leakage, nodulation, zinc accumulation, burrs and the like cannot be caused, and the zinc plating color is generally gray or dark gray. Specific evaluation values of color difference are not given according to the appearance color, acceptance evaluation standards are different due to the fact that the specific evaluation values of the color difference are not given according to standards, and all the evaluation values depend on the visual and experience of acceptance personnel, the colors of hot-galvanized layers of partial steel frameworks are different in depth, obvious color difference exists, the overall appearance of the engineering is seriously influenced, and even the construction prize evaluation results of the engineering participating in Luban prizes and the like are influenced. Therefore, the evaluation of the color difference of the hot galvanizing layer of the power transmission and transformation steel framework is very important.
Any color is composed of three primary colors of red, green and blue, and the magnitude quantitatively representing the degree of color difference between two stimulus color samples is the color difference. The calculation formula is as follows:
ΔE1=
Figure 77450DEST_PATH_IMAGE001
wherein: Δ L is the lightness difference; Δ a is red-black chromaticity difference; Δ b is a blue-yellow quality difference.
The human eyes are used as receiving terminals of images, external light is focused on the retina through the cornea, the iris and the crystalline lens, the photosensitive cells are stimulated to emit nerve pulses, and the nerve pulses are transmitted to the brain through the optic nerves to generate vision. Human eye resolution is related to brightness and gray scale. The luminance resolution is a capability of discriminating a small change in luminance, and is expressed by a ratio of a minimum luminance difference Δ L that can be discriminated by human eyes to luminance. The gray scale uses black as a reference color, and displays an image in black of different saturation. Each gray object has a luminance value from 0% to 100%, the higher the percentage, the darker the color, and the lower the percentage, the whiter the color. The method comprises the step of dividing white and black into a plurality of levels according to a logarithmic relation, wherein the gray levels are 0-255, white is 255, and black is 0.
The data shows that the correct human eye recognition rates of 8, 16 and 32 gray scales of 0-255 gray scale display systems are 93.16%, 68.75% and 45.31%, respectively. Therefore, when the color difference value of two objects is 8 or less, it is difficult for human eyes to distinguish.
Disclosure of Invention
In order to solve the problems, the invention provides a method for detecting the color difference quality of a hot-galvanized layer of a power transmission and transformation steel framework, which has the following specific technical scheme:
a method for detecting the color difference quality of a hot-dip galvanized layer of a power transmission and transformation steel framework is characterized by comprising the following steps: the method comprises the following steps:
s1: visually determining a region with large color difference deviation of the power transmission and transformation steel framework;
s2: carrying out color difference evaluation index detection on a hot-galvanized layer of the power transmission and transformation steel framework; the evaluation indexes comprise a hot galvanizing layer color difference value, the area of a single hot galvanizing layer color difference area and the boundary distance of adjacent hot galvanizing layer color difference areas;
s3: and judging whether the color difference of the hot-galvanized layer of the power transmission and transformation steel framework is qualified or not according to the color difference evaluation index result of the hot-galvanized layer of the power transmission and transformation steel framework, and judging that the color difference of the corresponding hot-galvanized layer of the power transmission and transformation steel framework is unqualified as long as the detection result of any one evaluation index of the color difference evaluation indexes of the hot-galvanized layer of the power transmission and transformation steel framework exceeds a given value.
Preferably, the reference values of the evaluation index are as shown in table 1 below:
TABLE 1 evaluation index of color difference of hot-galvanized layer of power transmission and transformation steel framework
Figure 891822DEST_PATH_IMAGE002
Preferably, the color difference of the hot-dip galvanized layer is detected by a portable color difference meter.
Preferably, the area of the single hot-dip galvanized layer color difference area is measured by a portable color difference meter, then the length is measured by a measuring tape, and finally the area of the color difference is calculated; and the boundary distance between the adjacent color difference areas of the hot-dip galvanized layers is measured by a measuring tape.
The invention has the beneficial effects that: the invention increases the key index of the color difference detection of the hot galvanized layer of the power transmission and transformation steel framework, and solves the problems that the current standard of the color difference of the galvanized layer has no specific evaluation value, the acceptance detection standards are different, and the overall appearance of the project is influenced. The invention unifies the acceptance standard, can guide technical personnel to carry out the color difference acceptance of the power transmission and transformation steel framework, can rapidly carry out the color difference quality acceptance of the hot-galvanized layer of the power transmission and transformation steel framework by adopting the method of the invention, and improves the integral impression of project engineering.
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FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings in which:
as shown in figure 1, the method for detecting the color difference quality of the hot-galvanized layer of the power transmission and transformation steel framework is characterized by comprising the following steps of: the method comprises the following steps:
s1: and visually determining the area with large color difference deviation of the power transmission and transformation steel framework.
S2: carrying out color difference evaluation index detection on a hot-galvanized layer of the power transmission and transformation steel framework; the evaluation indexes comprise a hot galvanizing layer color difference value, the area of a single hot galvanizing layer color difference area and the boundary distance of adjacent hot galvanizing layer color difference areas; wherein, the color difference of the hot galvanizing layer is detected by a portable color difference meter; the area of the single hot galvanizing layer color difference area is measured by a portable color difference meter, then the length is measured by a tape measure, and finally the color difference area is calculated; and measuring the boundary distance between the adjacent color difference areas of the hot-dip galvanized layers by using a measuring tape. The color difference evaluation indexes of the hot galvanized layer of the power transmission and transformation steel framework are shown in the following table 1.
TABLE 1 evaluation index of color difference of hot-galvanized layer of power transmission and transformation steel framework
Figure 589651DEST_PATH_IMAGE003
S3: and judging whether the color difference of the hot-galvanized layer of the power transmission and transformation steel framework is qualified or not according to the color difference evaluation index result of the hot-galvanized layer of the power transmission and transformation steel framework, and judging that the color difference of the corresponding hot-galvanized layer of the power transmission and transformation steel framework is unqualified as long as the detection result of any one evaluation index of the color difference evaluation indexes of the hot-galvanized layer of the power transmission and transformation steel framework exceeds a given value.
The present invention is not limited to the above-described embodiments, which are merely preferred embodiments of the present invention, and the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (4)

1. A method for detecting the color difference quality of a hot-dip galvanized layer of a power transmission and transformation steel framework is characterized by comprising the following steps: the method comprises the following steps:
s1: visually determining a region with large color difference deviation of the power transmission and transformation steel framework;
s2: carrying out color difference evaluation index detection on a hot-galvanized layer of the power transmission and transformation steel framework; the evaluation indexes comprise a hot galvanizing layer color difference value, the area of a single hot galvanizing layer color difference area and the boundary distance of adjacent hot galvanizing layer color difference areas;
s3: and judging whether the color difference of the hot-galvanized layer of the power transmission and transformation steel framework is qualified or not according to the color difference evaluation index result of the hot-galvanized layer of the power transmission and transformation steel framework, and judging that the color difference of the corresponding hot-galvanized layer of the power transmission and transformation steel framework is unqualified as long as the detection result of any one evaluation index of the color difference evaluation indexes of the hot-galvanized layer of the power transmission and transformation steel framework exceeds a given value.
2. The method for detecting the color difference quality of the hot-galvanized layer of the electric transmission and transformation steel framework according to claim 1, wherein the method comprises the following steps: the reference values of the evaluation index are shown in table 1 below:
TABLE 1 evaluation index of color difference of hot-galvanized layer of power transmission and transformation steel framework
Figure 58911DEST_PATH_IMAGE002
3. The method for detecting the color difference quality of the hot-galvanized layer of the electric transmission and transformation steel framework according to claim 1, wherein the method comprises the following steps: and the color difference of the hot galvanizing layer is detected by adopting a portable color difference meter.
4. The method for detecting the color difference quality of the hot-galvanized layer of the electric transmission and transformation steel framework according to claim 3, wherein the method comprises the following steps: the area of the single hot galvanizing layer color difference area is measured by a portable color difference meter, then the length is measured by a tape measure, and finally the area of the color difference is calculated; and the boundary distance between the adjacent color difference areas of the hot-dip galvanized layers is measured by a measuring tape.
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