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

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

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Publication number
CN114324070A
CN114324070A CN202111507896.9A CN202111507896A CN114324070A CN 114324070 A CN114324070 A CN 114324070A CN 202111507896 A CN202111507896 A CN 202111507896A CN 114324070 A CN114324070 A CN 114324070A
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hydrophobicity
voltage bushing
umbrella skirt
outdoor
shed
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安义岩
张小明
陈雅琦
戴雨薇
万润楠
马慧敏
马小健
李博
刘文斌
宋友
邓建钢
兰贞波
徐卓林
聂宇
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State Grid Corp of China SGCC
Wuhan NARI Ltd
Electric Power Research Institute of State Grid Eastern Inner Mongolia Power Co Ltd
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State Grid Corp of China SGCC
Wuhan NARI Ltd
Electric Power Research Institute of State Grid Eastern Inner Mongolia Power Co Ltd
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Priority to CN202111507896.9A priority Critical patent/CN114324070A/en
Publication of CN114324070A publication Critical patent/CN114324070A/en
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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

一种高压套管伞裙表面憎水性户外检测方法、记录媒体及 系统A kind of outdoor detection method, recording medium and system for hydrophobicity of surface of high-voltage casing umbrella skirt

技术领域technical field

本发明属于绝缘材料检测领域技术领域,公开了一种高压套管伞裙表面憎水性户外检测方法、存储有能执行该方法程序的记录媒体及系统。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.

背景技术Background technique

随着国家工业体系快速发展,我国电力需求的不断增大,因此,高压输送电大范围扩展,大量高压套管在近十年被使用,而与之相对的运行参数的增加以及环境污染加剧,随之带来高压套管伞裙故障增多。在如此复杂环境下,伞裙表面性能易于遭受以下几个因素影响:(1)污垢沉积,受环境影响,伞裙长期暴露大气环境中易于在表面产生污垢积累,这些污垢积累速率受区域气候影响,在污染严重的局部地区污垢沉积速率较快;(2)潮湿,潮湿环境易在伞裙表面产生结露现象,凝结露水将促成沉积污垢的结块,使污垢出现导电性能;(3)低温。低温使得伞裙绝缘材料中分子布朗运动降低,由复合绝缘子内部移出到表面以包裹污垢的LMW分子数量减少,因此低温使得绝缘子憎水性及憎水迁移性下降;(4)老化。随着运行时间的延长,绝缘子经受风打雨吹日晒,同时在套管局部高温、潮湿、电晕以及机械应力作用下,表面材料会因此产生表面硬化、粉化等现象,最终带来绝缘材料成分变质老化;在上述因素作用下伞裙表面材料会出现显著憎水性能恶化,而这些憎水性能下降使得伞裙抗污闪能力下降,导致变压器事故的频发,使电力系统的安全运行受到严重威胁。及时更换套管和清除污秽,能预防和减少事故的发生。为此准确、方便、可靠地监测变压器套管的憎水性及运行工况,显得尤为重要。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.

目前,国内外憎水性的测量方法主要有静态接触角法、表面张力法和憎水性(HC,Hydrophobic Classification)分级法。现阶段被现场大量采用的是瑞典输电研究所(STRI,Swedish Transmission Research Institution)提出的喷水分级法。该方法将复合绝缘子表面的憎水性分为7个等级并给出分级判据和标准图片。试验过程中,用普通喷壶对绝缘子试样表面喷洒水雾,观察试样表面水分的分布状况并与标准图片进行比对,得出绝缘子憎水性等级。喷水分级法由于操作简单,对设备要求低,已成为了复合绝缘子在线监测的主要方法,但对人的主观依赖性大。近年来喷水分级法结合图像处理为定量的判定绝缘子憎水性等级提供了依据。喷水分级法结合图像处理的首要步骤是准确提取出绝缘子憎水性图像中的水珠或水迹。憎水性图像呈现低对比度、光照不均,水珠出现边缘缺失、阴影、反光,粘连,以及污垢的存在等问题都会加大图像处理的难度,导致图像特征参数提取错误。而表面张力测量法因为测量过程气泡环境要求,没办法在户外环境进行。静态接触角测量则不同,该方法利用小管滴出液滴在表面铺展轮廓与表面所形成的角度来判定憎水性能,当铺展面积越大,表示表面越亲水,而接触角度越大则表面材料越疏水(憎水)。现阶段该方法主要应用于实验室范围,而尚未开发现场测试系统。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.

发明内容SUMMARY OF THE INVENTION

针对以上问题,本发明提供一种高压套管伞裙表面憎水性户外检测方法,具体方案包括如下步骤: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.设置包围待测试的高压套管伞裙表面的照相室,内置单色光源;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.将所述高压套管伞裙表面水平固定于所述照相室下方;S2. horizontally fix the surface of the high-voltage casing shed below the photographic chamber;

S3.通过设置于所述照相室上方的多个滴管使染色液滴竖直向下滴至所述高压套管伞裙表面;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.通过设置于照相室内的相机拍摄竖直面上液滴静止于所述高压套管伞裙表面的图片并回传给工作人员;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.工作人员通过所述图片测定液滴与所述高压套管伞裙表面的接触角。S5. The staff determines the contact angle between the droplet and the surface of the shed of the high-pressure casing through the picture.

这种检测方法能够在户外低对比度、光照不均的情况下,通过设置照相室并配备单色光源,减少了室外自然光对图像干扰造成的失真。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.

优选的,染色液滴的色相与单色光源的色相互补。Preferably, the hue of the dyed droplets is complementary to that of the monochromatic light source.

借助反相单色光照物体形成“视觉黑体”的原理,方便工作人员提取到液体静止于伞裙上的状态特征。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.

优选的,染色液滴为绿色,所述单色光源为红色;或者,染色液滴为红色,所述单色光源为绿色。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.

红色、绿色都是人眼的敏感色,容易将液滴染色时将其色相调标准。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.

优选的,相机为一对双目相机,对向置于照相室侧壁。Preferably, the cameras are a pair of binocular cameras, which are placed on the side wall of the photographing room facing each other.

双目相机较单目相机能提供更多的液滴状态数据,立体的反映液体与伞裙表面的接触属性,对向布置有利于消除盲区。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.

本发明的另一方案在于提供一种非暂态可读记录媒体,用以存储包含多个指令的一个或多个程序,当执行指令时,将致使处理电路执行上述的一种高压套管伞裙表面憎水性户外检测方法。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.

本发明的又一方案在于提供一种高压套管伞裙表面憎水性户外检测系统,包括处理电路及与其电性耦接的存储器,所述存储器配置储存至少一程序,所述程序包含多个指令,所述处理电路运行所述程序,能执行上述高压套管伞裙表面憎水性户外检测方法。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.

附图说明Description of drawings

图1为本发明实施例中实施高压套管伞裙表面憎水性户外检测方法的装置示意图;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;

图中1.高精度低速驱动电机;2.传动支撑保护架;3.滴管;4.单色光源;5.照相室、6.照相机、7.染色液滴。In the figure, 1. High-precision low-speed drive motor; 2. Transmission support and protection frame; 3. Dropper; 4. Monochromatic light source;

具体实施方式Detailed ways

为使本发明实施例的目的、技术方案和优点更加清楚,下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行描述,所描述的实施例是本发明一部分实施例,而不是全部实施例。基于本发明中的实施例,本领域技术人员在没有做出创新劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。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.

如图1所示,用于实施高压套管伞裙表面憎水性户外检测方法的装置包括:高精度低速驱动电机1、传动支撑保护架2、滴管3、单色光源4(此例中为红色照明灯)、照相室5、照相机6(此处为带无线传输双目摄像头的电子拍照装置)、染色液滴7(此例中使用绿色染色剂);其中,照相室5包围待测试的高压套管伞裙表面,形成封闭体,伞裙表面上方设置单色光源4,传动支撑保护架2固定于照相室5外表面上方,用于支撑高精度低速驱动电机1及减速传动机构;两部照相机6对向固定于照相室5的内侧壁。滴管3置于照相室5内伞裙表面上方,滴管口竖直向下固定。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.

高精度低速驱动电机1通过丝杆与四支联动的滴管3进口处的泵相连,驱动染色液体进入滴管3中,并使得该液体能以单滴的方式从滴管3下端滴出,随后照相机6与单色照明灯4开关联动,在滴管3完成滴液动作后自动开启,对所滴落在伞裙表面的液滴7进行拍照,获得单色光照射下的非透明液滴图片,并利用摄像头无线传输功能将图片传回工作人员手机。工作人员通过无线传输图片获得液滴表面铺展情况,测定液滴与表面接触角,通过对四个液滴进行同时测定,获得伞裙局部区域多点测试数据,通过多点平均的办法获得伞裙表面材料憎水性能评价。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.

本领域内的技术人员应明白,本发明的实施例可提供为方法、系统、或计算机程序产品。因此,本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且,本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机、可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。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.

本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器,使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。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.

这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中,使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品,该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。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.

这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上,使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理,从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。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.

将上述方法步骤汇编成程序再存储于硬盘或其他非暂态存储介质就构成了本发明的“一种非暂态可读记录媒体”技术方案;而将该存储介质与计算机处理器电连接,通过数据处理能完成高压套管伞裙表面憎水性户外检测,则构成本发明的“一种高压套管伞裙表面憎水性户外检测系统”技术方案。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.

最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。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.
CN202111507896.9A 2021-12-10 2021-12-10 A kind of outdoor detection method, recording medium and system for hydrophobicity of surface of high-voltage casing umbrella skirt Pending CN114324070A (en)

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