CN110866895B - Method for detecting quality of hot galvanizing layer of power transmission and transformation steel framework - Google Patents
Method for detecting quality of hot galvanizing layer of power transmission and transformation steel framework Download PDFInfo
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- CN110866895B CN110866895B CN201911020053.9A CN201911020053A CN110866895B CN 110866895 B CN110866895 B CN 110866895B CN 201911020053 A CN201911020053 A CN 201911020053A CN 110866895 B CN110866895 B CN 110866895B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
- G06T7/0006—Industrial image inspection using a design-rule based approach
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/90—Determination of colour characteristics
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10024—Color image
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- Y—GENERAL 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS 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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
Abstract
The invention belongs to the technical field of power equipment detection, and particularly relates to a method for detecting the quality of a hot galvanizing layer of a power transmission and transformation steel framework. The method comprises the following specific steps: (1) The region with larger chromatic aberration deviation of the power transmission and transformation steel framework is determined visually; (2) Carrying out color difference evaluation index detection on a hot galvanizing layer of a power transmission and transformation steel framework; (3) And evaluating according to the evaluation index result of the hot galvanizing layer of the power transmission and transformation steel framework. The invention determines the key index of the color difference detection of the power transmission and transformation equipment: the hot galvanizing layer color difference value, the area of a single hot galvanizing layer color difference area and the boundary interval of adjacent hot galvanizing layer color difference areas. The problem that the whole appearance of engineering is affected due to the fact that acceptance detection standards are different because no specific evaluation value is available for the current standard of galvanized layer chromatic aberration is solved. The method can rapidly develop the quality acceptance of the hot galvanizing coating of the power transmission and transformation steel framework, and improve the overall impression of project engineering.
Description
Technical Field
The invention belongs to the technical field of power equipment detection, and particularly relates to a method for detecting the quality of a hot galvanizing layer of a power transmission and transformation steel framework.
Background
The hot dip plating technique is a protection method of a metal anticorrosive coating which is to dip-plated base material into molten coating metal or alloy liquid, keep the surface of a base body in contact with the molten metal for a period of time, and then take out the base body so as to adhere a layer of uniform and smooth surface to the base body. The existing national standard and line standard detection projects are four aspects of appearance, thickness, uniformity and adhesive force of a galvanized layer. The appearance is mainly checked visually, the surface is required to be continuous and complete, and the defects of acid washing, plating omission, nodulation, zinc accumulation, burrs and the like cannot be caused, and the galvanized color is generally gray or dark gray. Aiming at the appearance color, the standard does not give a specific color difference evaluation value, and the inspection evaluation standard is different due to the visual and experience of inspection personnel, so that the color depth of a part of hot galvanizing layer of the steel framework is inconsistent, obvious color difference exists, the whole appearance of the engineering is seriously influenced, and even the engineering participates in building type prize evaluation results such as the robust class prize and the like. Therefore, the development of the assessment of the chromatic aberration of the hot galvanizing layer of the power transmission and transformation steel framework is particularly 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 color difference. The calculation formula is as follows:
ΔE 1 =；
wherein: Δl is the brightness difference; Δa is the red-black scale difference; Δb is blue-yellow poor.
The human eyes are used as receiving terminals of images, external light is focused on retina through cornea, iris and crystalline lens, and the photoreceptor cells are stimulated to send nerve impulses, and the nerve impulses are transmitted to brain through optic nerve to generate vision. Human eye resolution is related to brightness and gray scale. The luminance resolution is the ability to discriminate small variations in luminance, and is expressed as the ratio of the minimum luminance difference Δl that can be discriminated by the human eye to the luminance. The gray scale displays an image with black as a reference color and black of different saturation. Each gray object has a luminance value from 0% to 100%, the higher the percentage, the darker the color, the lower the percentage, the more white the color. The white and black are divided into a plurality of levels according to logarithmic relation, and the gray level is formed, the range is 0-255, the white is 255, and the black is 0.
The data shows that in the 0-255 gray scale display system, the correct recognition rate of human eyes is 93.16%, 68.75% and 45.31% respectively when the gray scale numbers are 8, 16 and 32. Therefore, when the color difference value of the two objects is 8 or less, the human eyes can not distinguish the objects easily.
Disclosure of Invention
In order to solve the problems, the invention provides a method for detecting the quality of a hot galvanizing layer of a power transmission and transformation steel framework, which comprises the following specific technical scheme:
a method for detecting the quality of a hot galvanizing layer of a power transmission and transformation steel framework is characterized by comprising the following steps: the method comprises the following steps:
s1: the region with larger chromatic aberration deviation of the power transmission and transformation steel framework is determined visually;
s2: carrying out color difference evaluation index detection on a hot galvanizing layer of a power transmission and transformation steel framework; the evaluation index comprises a hot galvanizing layer color difference value, a single hot galvanizing layer color difference area and adjacent hot galvanizing layer color difference area boundary spacing;
s3: judging whether the hot galvanizing layer chromatic aberration of the power transmission and transformation steel framework is qualified according to the hot galvanizing layer chromatic aberration evaluation index result of the power transmission and transformation steel framework, and judging that the corresponding hot galvanizing layer chromatic aberration of the power transmission and transformation steel framework is unqualified as long as the detection result of any one of the hot galvanizing layer chromatic aberration evaluation indexes of the power transmission and transformation steel framework exceeds a given value.
Preferably, the reference values of the evaluation index are shown in table 1 below:
table 1 evaluation index of chromatic aberration of hot dip galvanizing layer of power transmission and transformation steel frame
Preferably, the chromatic aberration of the hot dip galvanizing layer is detected by a portable color difference meter.
Preferably, 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 the boundary distance between the adjacent hot galvanizing coat color difference areas is measured by a tape measure.
The beneficial effects of the invention are as follows: the invention increases key indexes for detecting the chromatic aberration of the hot galvanizing layer of the power transmission and transformation steel framework, and solves the problems that the current standard of the chromatic aberration of the galvanized layer has no specific evaluation value, so that the acceptance detection standard is different and the whole appearance and feel of the engineering are affected. The invention unifies acceptance criteria, can guide technicians to carry out chromatic aberration acceptance of the power transmission and transformation steel framework, and can rapidly carry out chromatic aberration quality acceptance of the hot galvanizing layer of the power transmission and transformation steel framework by adopting the method of the invention, thereby improving the overall impression of project engineering.
Drawings
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 description of the invention, taken in conjunction with the accompanying drawings and specific examples:
as shown in FIG. 1, the method for detecting the quality of the hot galvanizing layer of the power transmission and transformation steel framework is characterized by comprising the following steps: the method comprises the following steps:
s1: and visually determining the region with larger chromatic aberration deviation of the power transmission and transformation steel framework.
S2: carrying out color difference evaluation index detection on a hot galvanizing layer of a power transmission and transformation steel framework; the evaluation index comprises a hot galvanizing layer color difference value, a single hot galvanizing layer color difference area and adjacent hot galvanizing layer color difference area boundary spacing; wherein the chromatic aberration of the hot galvanizing layer is detected by a portable chromatic aberration meter; measuring the area of a single hot galvanizing layer chromatic aberration area through a portable chromatic aberration meter, measuring the length by adopting a tape measure, and finally calculating the chromatic aberration area; the boundary distance between the adjacent hot galvanizing coat color difference areas is measured by a tape measure. The evaluation indexes of the hot dip galvanizing layer color difference of the power transmission and transformation steel framework are shown in the following table 1.
Table 1 evaluation index of chromatic aberration of hot dip galvanizing layer of power transmission and transformation steel frame
S3: judging whether the hot galvanizing layer chromatic aberration of the power transmission and transformation steel framework is qualified according to the hot galvanizing layer chromatic aberration evaluation index result of the power transmission and transformation steel framework, and judging that the corresponding hot galvanizing layer chromatic aberration of the power transmission and transformation steel framework is unqualified as long as the detection result of any one of the hot galvanizing layer chromatic aberration evaluation indexes of the power transmission and transformation steel framework exceeds a given value.
The present invention is not limited to the specific embodiments described above, but is to be construed as being limited to the preferred embodiments of the present invention, and any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are intended to be included in the scope of the present invention.
Claims (3)
1. A method for detecting the quality of a hot galvanizing layer of a power transmission and transformation steel framework is characterized by comprising the following steps: the method comprises the following steps:
s1: the region with larger chromatic aberration deviation of the power transmission and transformation steel framework is determined visually;
s2: carrying out color difference evaluation index detection on a hot galvanizing layer of a power transmission and transformation steel framework; the evaluation index comprises a hot galvanizing layer color difference value, a single hot galvanizing layer color difference area and adjacent hot galvanizing layer color difference area boundary spacing; the reference values of the evaluation index are as follows:
when the color difference value is less than or equal to 8, the area of a single hot galvanizing layer color difference area and the areas of a plurality of color difference areas are allowed;
at 8 < color difference value.ltoreq.16, a single color difference region area.ltoreq.100 mm. Times.100. 100mm is permissible, and within an evaluation range of 800 mm. Times.500 mm, there is permissible a color difference region satisfying the following three conditions simultaneously:
(1) The area of the single chromatic aberration region is not more than 100mm multiplied by 100mm;
(2) The area of the color difference area is not more than 3;
(3) The interval between the boundaries of adjacent color difference areas is not less than 150mm;
when the color difference value is more than 16, the area of a single color difference area and the areas of a plurality of color difference areas are not allowed;
s3: judging whether the hot galvanizing layer chromatic aberration of the power transmission and transformation steel framework is qualified according to the hot galvanizing layer chromatic aberration evaluation index result of the power transmission and transformation steel framework, and judging that the corresponding hot galvanizing layer chromatic aberration of the power transmission and transformation steel framework is unqualified as long as the detection result of any one of the hot galvanizing layer chromatic aberration evaluation indexes of the power transmission and transformation steel framework exceeds a given value.
2. The method for detecting the quality of the hot dip galvanizing layer of the power transmission and transformation steel framework according to claim 1, which is characterized by comprising the following steps: and the chromatic aberration of the hot dip galvanized layer is detected by a portable chromatic aberration meter.
3. The method for detecting the quality of the hot dip galvanizing layer of the power transmission and transformation steel framework according to claim 2, which is characterized by comprising 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 color difference area is calculated; and the boundary distance between the adjacent hot galvanizing coat color difference areas is measured by a tape measure.
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