CN114324070A - A kind of outdoor detection method, recording medium and system for hydrophobicity of surface of high-voltage casing umbrella skirt - Google Patents

Abstract

The invention relates to the field of insulating material detection, in particular to an outdoor detection method for the surface hydrophobicity of a high-voltage bushing shed, which comprises the following steps: adopt electronic dropping liquid pipe, to the single liquid drop of full skirt surface drippage, utilize two binocular cameras of opposite arrangement to obtain the situation of spreading of liquid drop on the full skirt surface, the liquid drop adds green dyeing agent, and the inside monochromatic ruddiness that adopts of testing arrangement simultaneously shines, and single test adopts four droppers to test simultaneously in order to obtain the multiple spot hydrophobic performance and reduce measuring error, finally realizes the hydrophobic detection work of outdoor environment lower surface. The method overcomes the defect of poor accuracy of an online monitoring image of the existing water spraying grading method, makes up for the loss of outdoor contact angle measurement on the surface of the material, and realizes the surface hydrophobicity detection of the umbrella skirt in the outdoor environment. The invention also provides a non-transient readable recording medium storing the program of the method and a system comprising the medium, wherein the program can be called by a processing circuit to execute the method.

Description

A kind of outdoor detection method, recording medium and system for hydrophobicity of surface of high-voltage casing umbrella skirt

technical field

The invention belongs to the technical field of the detection field of insulating materials, and discloses an outdoor detection method for hydrophobicity of the surface of a high-voltage bushing umbrella skirt, a recording medium and a system capable of executing the program of the method are stored.

Background technique

With the rapid development of the national industrial system, my country's electricity demand continues to increase. Therefore, high-voltage transmission electricity has expanded in a large range, and a large number of high-voltage bushings have been used in the past ten years. The increase in operating parameters and the aggravation of environmental pollution have increased with As a result, the failure of the high-voltage casing shed has increased. In such a complex environment, the surface performance of the umbrella skirt is easily affected by the following factors: (1) Fouling deposition, affected by the environment, the long-term exposure of the umbrella skirt to the atmospheric environment is prone to accumulation of dirt on the surface, and the accumulation rate of these dirt is affected by the regional climate. , in the heavily polluted local area, the dirt deposition rate is faster; (2) humid, humid environment is prone to condensation on the surface of the umbrella skirt, and the condensation water will promote the agglomeration of the deposited dirt and make the dirt conductive; (3) low temperature . Low temperature reduces the Brownian motion of molecules in the shed insulating material, and the number of LMW molecules that move out from the interior of the composite insulator to the surface to wrap the dirt decreases. Therefore, the low temperature reduces the hydrophobicity and hydrophobic mobility of the insulator; (4) aging. With the prolongation of operating time, the insulator is subjected to wind, rain and sun. At the same time, under the action of local high temperature, humidity, corona and mechanical stress on the casing, the surface material will have surface hardening and pulverization, which will eventually lead to insulation. The material composition deteriorates and ages; under the action of the above factors, the surface material of the umbrella skirt will have a significant deterioration of hydrophobicity, and these hydrophobic properties will reduce the anti-pollution flashover ability of the umbrella skirt, resulting in frequent transformer accidents and the safe operation of the power system. severely threatened. Timely replacement of the casing and removal of contamination can prevent and reduce the occurrence of accidents. For this reason, it is particularly important to monitor the hydrophobicity and operating conditions of the transformer bushing accurately, conveniently and reliably.

At present, the measurement methods of hydrophobicity at home and abroad mainly include static contact angle method, surface tension method and hydrophobicity (HC, Hydrophobic Classification) classification method. At this stage, the water spray classification method proposed by the Swedish Transmission Research Institution (STRI, Swedish Transmission Research Institution) is widely used in the field. The method divides the hydrophobicity of the composite insulator surface into 7 grades and gives the classification criteria and standard pictures. During the test, spray water mist on the surface of the insulator sample with an ordinary watering can, observe the distribution of moisture on the surface of the sample and compare it with the standard picture to obtain the hydrophobicity level of the insulator. Due to its simple operation and low requirements for equipment, the water spray classification method has become the main method for on-line monitoring of composite insulators, but it is highly dependent on people. In recent years, the water jet classification method combined with image processing provides a basis for quantitatively determining the hydrophobicity level of insulators. The first step of the water jet classification method combined with image processing is to accurately extract the water droplets or water traces in the hydrophobic image of the insulator. Hydrophobic images show low contrast, uneven lighting, missing edges, shadows, reflections, sticking, and the existence of dirt in water droplets, which will increase the difficulty of image processing and lead to errors in the extraction of image feature parameters. The surface tension measurement method cannot be performed in an outdoor environment due to the requirements of the bubble environment during the measurement process. The static contact angle measurement is different. This method uses the angle formed by the spreading profile of the small tube on the surface and the surface to determine the hydrophobicity. The larger the spreading area, the more hydrophilic the surface, and the larger the contact angle, the more the surface. The more hydrophobic (water repellent) the material is. At this stage, the method is mainly used on a laboratory scale, and a field test system has not yet been developed.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention provides an outdoor detection method for the hydrophobicity of the surface of a high-voltage casing shed, and the specific scheme includes the following steps:

S1. Set up a photo room surrounding the surface of the high-voltage casing shed to be tested, with a built-in monochromatic light source;

S2. horizontally fix the surface of the high-voltage casing shed below the photographic chamber;

S3. Dyeing droplets are dropped vertically downward onto the surface of the high-voltage casing shed through a plurality of droppers disposed above the photographic chamber;

S4. Take a picture of the droplet on the vertical surface standing still on the surface of the high-voltage casing umbrella skirt by using a camera set in the camera room and send it back to the staff;

S5. The staff determines the contact angle between the droplet and the surface of the shed of the high-pressure casing through the picture.

This detection method can reduce the distortion of image interference caused by outdoor natural light by setting up a photo studio and equipped with a monochromatic light source in the case of low contrast and uneven lighting outdoors.

Preferably, the hue of the dyed droplets is complementary to that of the monochromatic light source.

With the help of the principle of "visual black body" formed by inverse monochromatic lighting objects, it is convenient for the staff to extract the state characteristics of the liquid resting on the umbrella skirt.

Preferably, the dyed droplets are green, and the monochromatic light source is red; or, the dyed droplets are red, and the monochromatic light source is green.

Red and green are both sensitive colors of the human eye, and it is easy to adjust the hue of the droplets when dyeing them.

Preferably, the cameras are a pair of binocular cameras, which are placed on the side wall of the photographing room facing each other.

The binocular camera can provide more droplet state data than the monocular camera, and can reflect the contact properties of the liquid and the surface of the shed in a three-dimensional manner. The opposite arrangement is conducive to eliminating blind spots.

Another aspect of the present invention is to provide a non-transitory readable recording medium for storing one or more programs including a plurality of instructions, which, when executed, cause a processing circuit to execute the above-mentioned high voltage bushing umbrella Outdoor testing method for hydrophobicity of skirt surface.

Another aspect of the present invention is to provide an outdoor detection system for the hydrophobicity of the surface of a high-voltage bushing shed, which includes a processing circuit and a memory electrically coupled thereto, the memory is configured to store at least one program, and the program includes a plurality of instructions , the processing circuit runs the program, and can execute the above-mentioned outdoor detection method for the hydrophobicity of the surface of the umbrella skirt of the high-voltage bushing.

Description of drawings

1 is a schematic diagram of a device for implementing an outdoor detection method for hydrophobicity on the surface of a high-voltage casing shed in an embodiment of the present invention;

In the figure, 1. High-precision low-speed drive motor; 2. Transmission support and protection frame; 3. Dropper; 4. Monochromatic light source;

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention, and the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making innovative efforts shall fall within the protection scope of the present invention.

As shown in Figure 1, the device for implementing the outdoor detection method for the hydrophobicity of the surface of the high-voltage casing shed includes: a high-precision low-speed drive motor 1, a transmission support protection frame 2, a dropper 3, and a monochromatic light source 4 (in this example, the A red light), a photographic chamber 5, a camera 6 (here an electronic photographing device with a wireless transmission binocular camera), a dye drop 7 (green dye is used in this example); wherein, the photographic chamber 5 surrounds the object to be tested The surface of the umbrella skirt of the high-voltage casing forms a closed body, a monochromatic light source 4 is arranged above the surface of the umbrella skirt, and the transmission support and protection frame 2 is fixed on the outer surface of the camera room 5 to support the high-precision low-speed drive motor 1 and the deceleration transmission mechanism; two The external camera 6 is fixed to the inner side wall of the photographing chamber 5 so as to face each other. The dropper 3 is placed above the surface of the umbrella skirt in the photographic room 5, and the dropper mouth is fixed vertically downward.

The high-precision and low-speed drive motor 1 is connected to the pump at the inlet of the four linked droppers 3 through the screw rod, and drives the dyeing liquid into the dropper 3, so that the liquid can drip out from the lower end of the dropper 3 in a single drop. Then the camera 6 is linked with the switch of the monochromatic light 4, and automatically turns on after the drip tube 3 completes the dripping action, and takes pictures of the droplets 7 dropped on the surface of the umbrella skirt to obtain non-transparent droplets under the illumination of the monochromatic light. Pictures, and use the camera's wireless transmission function to transmit the pictures back to the staff's mobile phones. The staff obtained the spread of the droplet surface through wireless transmission of pictures, and measured the contact angle between the droplet and the surface. Evaluation of hydrophobicity of surface materials.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computers having computer usable program code embodied therein, usable storage media including, but not limited to, disk storage, CD-ROM, optical storage, and the like.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each process and/or block in the flowchart illustrations and/or block diagrams, and combinations of processes and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to the processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing device produce Means for implementing the functions specified in a flow or flow of a flowchart and/or a block or blocks of a block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory result in an article of manufacture comprising instruction means, the instructions The apparatus implements the functions specified in the flow or flow of the flowcharts and/or the block or blocks of the block diagrams.

These computer program instructions can also be loaded on a computer or other programmable data processing device to cause a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process such that The instructions provide steps for implementing the functions specified in the flow or blocks of the flowcharts and/or the block or blocks of the block diagrams.

Assembling the above method steps into a program and then storing it in a hard disk or other non-transitory storage medium constitutes the technical solution of "a non-transitory readable recording medium" of the present invention; and the storage medium is electrically connected to the computer processor, The outdoor detection of hydrophobicity of the surface of the high-voltage casing shed can be completed through data processing, which constitutes the technical solution of "a system for the outdoor detection of the hydrophobicity of the surface of the high-voltage casing shed" of the present invention.

Finally, it should be noted that the above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or some technical features thereof may be equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. An outdoor detection method for the surface hydrophobicity of a high-voltage bushing shed is characterized by comprising the following steps:

s1, arranging a photographic chamber (5) surrounding the surface of a high-voltage bushing umbrella skirt to be tested, and arranging a monochromatic light source (4) in the photographic chamber;

s2, horizontally fixing the surface of the umbrella skirt of the high-voltage bushing below the photographic chamber (5);

s3, enabling dyeing liquid drops (7) to vertically and downwards drop to the surface of the umbrella skirt of the high-pressure sleeve through a plurality of droppers (3) arranged above the photographic chamber (5);

s4, shooting a picture that liquid drops on a vertical surface are still on the surface of the high-voltage bushing umbrella skirt by a camera (6) arranged in a camera chamber (5) and transmitting the picture back to a worker;

and S5, determining the contact angle of the liquid drop and the surface of the umbrella skirt of the high-voltage bushing by the worker through the picture.

2. The outdoor method for detecting the hydrophobicity of the surface of the umbrella skirt of the high-voltage bushing as claimed in claim 1, wherein the hue of the dye droplet (7) is complementary to the hue of the monochromatic light source (4).

3. The outdoor method for detecting the hydrophobicity of the surface of the umbrella skirt of the high voltage bushing as claimed in claim 2, wherein the dye drop (7) is green, and the monochromatic light source (4) is red.

4. The outdoor method for detecting the hydrophobicity of the surface of the umbrella skirt of the high voltage bushing as claimed in claim 2, wherein the dye drop (7) is red and the monochromatic light source (4) is green.

5. The outdoor testing method for the hydrophobicity of the surface of the umbrella skirt of the high voltage bushing of any one of claims 1 to 4, wherein the cameras (6) are a pair of binocular cameras, and are oppositely arranged on the side wall of the camera chamber.

6. A non-transitory readable recording medium storing one or more programs comprising instructions which, when executed, cause a processing circuit to perform a method for outdoor testing of the surface hydrophobicity of a high voltage bushing shed as recited in claim 5.

7. An outdoor testing system for hydrophobicity on the surface of a high voltage bushing shed, comprising a processing circuit and a memory electrically coupled thereto, wherein the memory is configured to store at least one program, the program comprising a plurality of instructions, and the processing circuit is capable of executing the program to perform a method for outdoor testing hydrophobicity on the surface of a high voltage bushing shed as claimed in claim 5.

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