Insulator hydrophobicity evaluation method and system based on laser induced photoluminescence

Abstract

The present invention provides a method and system for evaluating the hydrophobicity of an insulator based on laser induced photoluminescence. The method comprises the following steps: preparing a preset number of insulator samples according to preset sizes and immersing them in distilled water in an increasing immersion time sequence to obtain samples to be analyzed; performing contact angle measurement on each sample to be analyzed within a preset measurement time to obtain a corresponding hydrophobic angle; measuring the fluorescence intensity of each sample to be analyzed by a pre-built photoluminescence measuring device; obtaining a hydrophobicity prediction model according to the hydrophobic angle and the fluorescence intensity of each sample to be analyzed; and obtaining the measured fluorescence intensity of the insulator to be tested by the photoluminescence measuring device. The method is used to evaluate the hydrophobicity by obtaining a corresponding hydrophobic angle prediction value according to the hydrophobicity prediction model. The method can simply and effectively solve the problems of excessive subjectivity and inaccurate monitoring of the hydrophobicity performance of the existing insulator, and is of great significance to the maintenance of insulators and the safety of transmission lines.

Description

Technical Field

[0001] The invention relates to the technical field of insulator hydrophobicity detection, and in particular to an insulator hydrophobicity evaluation method and system based on laser induced photoluminescence. Background Art

[0002] High temperature vulcanized silicone rubber insulators are widely used in power transmission and distribution lines because of their high hardness, aging resistance, resistance to leakage tracking, hydrophobicity, anti-fouling, UV resistance, high and low temperature resistance, and high tear strength. However, under the combined effects of electric fields, mechanical loads, and environmental factors for a long time, the hydrophobicity of insulators will gradually be lost, which will have a serious impact on the normal operation of power transmission and distribution lines. Based on this, the effective monitoring of the hydrophobicity of insulators is also a key issue to ensure the safety of power transmission and distribution lines.

[0003] Existing insulator performance monitoring is mainly based on insulator status monitoring achieved by visual inspection, image enhancement, infrared thermal imaging and other technologies. For example, by real-time monitoring of the insulator status in a high-voltage operating environment, optical fiber insulator contamination monitoring and image recognition methods are integrated to reflect the contamination status of the insulator in operation, as well as fitting the insulator working status function by monitoring environmental parameters such as insulator leakage current, temperature, humidity and air pressure, and predicting the insulator working status based on real-time monitored parameter changes. However, it does not involve the hydrophobicity monitoring of insulating materials. Although some scholars have proposed a hydrophobicity detection method based on the manual classification of water droplet patterns formed on the surface of the insulator sprayed with water, it must be completed in a relatively short time and the detection results are highly subjective. It cannot be truly used to effectively evaluate the hydrophobicity of the insulator surface, nor is it conducive to timely and targeted maintenance by operation and maintenance personnel. Summary of the invention

[0004] The purpose of the present invention is to provide an insulator hydrophobicity evaluation method based on laser induced photoluminescence. By linking the laser induced photoluminescence technology with the hydrophobicity of the insulator surface, the fluorescence intensity of the insulator sample measured by the designed photoluminescence measuring device is combined with the hydrophobicity angle obtained by contact angle measurement to obtain a hydrophobicity prediction model, which is used to determine the hydrophobicity of the insulator using photoluminescence signals at the operation and maintenance site, effectively solving the technical defects of the existing insulator hydrophobicity performance monitoring being too subjective and inaccurate, and being able to simply and effectively detect the hydrophobicity of the insulator surface, facilitating the maintenance of the insulator, and providing reliable protection for the safe operation of the transmission line, and having important application value.

[0005] In order to achieve the above objectives, it is necessary to provide a method and system for evaluating the hydrophobicity of insulators based on laser induced photoluminescence in response to the above technical problems.

[0006] In a first aspect, an embodiment of the present invention provides a method for evaluating hydrophobicity of an insulator based on laser induced photoluminescence, the method comprising the following steps:

[0007] A preset number of insulator samples are prepared according to a preset size, and each insulator sample is immersed in distilled water according to an increasing immersion time sequence to obtain a corresponding sample to be analyzed;

[0008] Within a preset measurement time, the contact angle of each sample to be analyzed is measured to obtain the corresponding hydrophobic angle, and the fluorescence intensity of each sample to be analyzed is measured by a pre-built photoluminescence measurement device;

[0009] According to the hydrophobic angle and fluorescence intensity of each sample to be analyzed, a hydrophobicity prediction model is fitted;

[0010] The measured fluorescence intensity of the insulator to be tested is obtained by the photoluminescence measuring device, and the measured fluorescence intensity is input into the hydrophobicity prediction model to obtain the corresponding hydrophobicity angle prediction value, and the hydrophobicity evaluation result is obtained according to the hydrophobicity angle prediction value.

[0011] Furthermore, the material of the insulator sample is high temperature vulcanized silicone rubber;

[0012] The step of soaking each insulator sample in distilled water according to an increasing soaking time sequence to obtain the corresponding sample to be analyzed includes:

[0013] After each insulator sample is soaked for a corresponding soaking time, each insulator sample taken out from the distilled water is sprayed with distilled water within a preset distance, and the surface is wiped dry with a paper towel to obtain a corresponding sample to be analyzed.

[0014] Furthermore, the photoluminescence measuring device includes a control terminal, a nitrogen laser, a dye laser, a storage table, a long-pass filter and a fluorescence detector which are connected in sequence to form a loop; the long-pass filter includes an excitation light filter, an emission light filter, and a dichroic mirror arranged between the excitation light filter and the emission light filter.

[0015] Furthermore, the step of measuring the fluorescence intensity of each sample to be analyzed by using a pre-built photoluminescence measurement device includes:

[0016] The control terminal starts the nitrogen laser to emit laser pulses, and inputs the laser pulses into the dye laser to excite and generate fluorescence, and projects the fluorescence onto the sample to be analyzed on the storage table;

[0017] The fluorescence on the surface of the sample to be analyzed is collected, processed by a long-pass filter, and then input into a fluorescence detector for fluorescence detection. The output signal of the fluorescence detector is input into a control terminal, and the maximum fluorescence intensity of the sample to be analyzed is taken as the corresponding fluorescence intensity.

[0018] Furthermore, the step of obtaining a hydrophobicity evaluation result according to the hydrophobic angle prediction value comprises:

[0019] It is determined whether the predicted value of the hydrophobic angle is less than the hydrophobic angle threshold value. If so, the hydrophobicity evaluation result is determined to be a loss of hydrophobic performance. Otherwise, the hydrophobicity evaluation result is determined to be a good hydrophobic performance.

[0020] Furthermore, the step of obtaining a hydrophobicity evaluation result according to the hydrophobic angle prediction value further includes:

[0021] If the hydrophobicity assessment result is a loss of hydrophobicity, the hydrophobicity and salt density values ​​of the associated insulators are randomly inspected; the batch, model, operating area and operating years of the associated insulators and the insulator to be tested corresponding to the hydrophobicity assessment result are the same;

[0022] If more than a preset proportion of associated insulators have a loss of hydrophobicity and an abnormal salt density value, it is determined that the corresponding loss of hydrophobicity is related to the degree of pollution in the operating area.

[0023] In a second aspect, an embodiment of the present invention provides an insulator hydrophobicity evaluation system based on laser induced photoluminescence, the system comprising:

[0024] A sample preparation module is used to prepare a preset number of insulator samples according to a preset size, and soak each insulator sample in distilled water according to an increasing soaking time sequence to obtain a corresponding sample to be analyzed;

[0025] A data acquisition module is used to measure the contact angle of each sample to be analyzed within a preset measurement time to obtain the corresponding hydrophobic angle, and to measure the fluorescence intensity of each sample to be analyzed by a pre-built photoluminescence measurement device;

[0026] A model fitting module is used to fit a hydrophobicity prediction model according to the hydrophobic angle and fluorescence intensity of each sample to be analyzed;

[0027] The hydrophobicity evaluation module is used to obtain the measured fluorescence intensity of the insulator to be tested through the photoluminescence measurement device, input the measured fluorescence intensity into the hydrophobicity prediction model, obtain the corresponding hydrophobicity angle prediction value, and obtain the hydrophobicity evaluation result according to the hydrophobicity angle prediction value.

[0028] Furthermore, the photoluminescence measuring device includes a control terminal, a nitrogen laser, a dye laser, a storage table, a long-pass filter and a fluorescence detector which are connected in sequence to form a loop; the long-pass filter includes an excitation light filter, an emission light filter, and a dichroic mirror arranged between the excitation light filter and the emission light filter.

[0029] In a third aspect, an embodiment of the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0030] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0031] The above-mentioned application provides a method and system for evaluating the hydrophobicity of an insulator based on laser-induced photoluminescence. Through the method, a preset number of insulator samples made according to preset sizes are immersed in distilled water according to an increasing immersion time sequence to obtain samples to be analyzed, and within the preset measurement time, the contact angle of each sample to be analyzed is measured to obtain the corresponding hydrophobic angle, and after the fluorescence intensity of each sample to be analyzed is measured by a pre-built photoluminescence measurement device, a hydrophobicity prediction model is obtained by fitting the hydrophobic angle and fluorescence intensity of each sample to be analyzed, and after the measured fluorescence intensity of the insulator to be tested is obtained by the photoluminescence measurement device, the corresponding hydrophobic angle prediction value is obtained according to the hydrophobicity prediction model to perform hydrophobicity evaluation. Technical solution. Compared with the existing technology, this insulator hydrophobicity assessment method based on laser induced photoluminescence, by linking laser induced photoluminescence technology with the hydrophobicity of the insulator surface, effectively solves the technical defects of the existing insulator hydrophobicity performance monitoring being too subjective and inaccurate. It can simply and effectively detect the hydrophobicity of the insulator surface, facilitates the maintenance of insulators, and provides reliable protection for the safe operation of transmission lines, and has important application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of an application scenario of a method for evaluating hydrophobicity of an insulator based on laser induced photoluminescence in an embodiment of the present invention;

[0033] Figure 2 is a schematic flow chart of a method for evaluating hydrophobicity of an insulator based on laser induced photoluminescence in an embodiment of the present invention;

[0034] Figure 3 is a schematic structural diagram of a photoluminescence measuring device in an embodiment of the present invention;

[0035] Figure 4 Is adopted Figure 3 Schematic diagram of the fluorescence spectrum measured by the photoluminescence measurement device shown;

[0036] Figure 5 yes Figure 2 Schematic diagram of the hydrophobicity prediction model obtained by fitting in step S13;

[0037] Figure 6 is a schematic structural diagram of an insulator hydrophobicity evaluation system based on laser induced photoluminescence in an embodiment of the present invention;

[0038] Figure 7 It is a diagram of the internal structure of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and beneficial effects of the present application clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. Obviously, the embodiments described below are part of the embodiments of the present invention and are only used to illustrate the present invention, but are not used to limit the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] The laser induced photoluminescence insulator hydrophobicity evaluation method provided by the present invention can be applied to Figure 1 The terminal or server shown. Among them, the terminal can be but not limited to various personal computers, laptops, smart phones, tablet computers and portable wearable devices, and the server can be implemented by an independent server or a server cluster composed of multiple servers. The server obtains the fluorescence intensity and hydrophobic angle data of the insulator sample, fits the corresponding hydrophobicity prediction model, and performs hydrophobicity evaluation on the insulators at the operation and maintenance site according to the laser induced photoluminescence insulator hydrophobicity evaluation provided by the present invention, and uses the corresponding hydrophobicity evaluation results for subsequent analysis and research, or transmits them to the terminal-related operation and maintenance personnel for viewing and analysis, so as to facilitate timely maintenance by the operation and maintenance personnel; the following embodiments will explain in detail the insulator hydrophobicity evaluation method based on laser induced photoluminescence of the present invention.

[0041] In one embodiment, Figure 2 As shown, a method for evaluating the hydrophobicity of an insulator based on laser induced photoluminescence is provided, comprising the following steps:

[0042] S11. Prepare a preset number of insulator samples according to preset dimensions, and soak each insulator sample in distilled water according to an increasing soaking time sequence to obtain a corresponding sample to be analyzed; wherein, the material of the insulator sample is high temperature vulcanized silicone rubber (SIR); the corresponding preset dimensions can be set according to actual application requirements, with a thickness greater than 3 mm and a diameter greater than 50 mm, as long as the size of the insulator sample can cover the probe at the end of the optical fiber, and no specific restrictions are made here; the increasing soaking time sequence can be understood as including different soaking times and the different soaking times meet the requirement of gradually increasing, so that the hydrophobic properties of the samples to be analyzed obtained by soaking are different; the number of soaking times included in the increasing soaking time sequence is consistent with the preset number of insulator samples, that is, different insulator samples are soaked in distilled water at room temperature for different lengths of time to reduce the hydrophobic properties of the corresponding samples to different degrees, such as, if the preset number is 5, the 5 insulator samples are soaked for 5 different times, namely 24h, 72h, 120h, 168h and 240h. It should be noted that the above-mentioned preset number and the selection of the corresponding predicted soaking time sequence are only exemplary and not specifically limited;

[0043] Specifically, the step of soaking each insulator sample in distilled water according to an increasing soaking time sequence to obtain the corresponding sample to be analyzed includes:

[0044] After each insulator sample is soaked for a corresponding soaking time, each insulator sample taken out from the distilled water is sprayed with distilled water within a preset distance, and the surface is wiped dry with a paper towel to obtain a corresponding sample to be analyzed; wherein, the preset distance can be determined according to actual application requirements, and is preferably set to within 10 cm. After the distilled water used to soak the insulator sample that has reached the soaking time is removed, each insulator sample is sprayed with distilled water within 10 cm, and is wiped dry with a paper towel at intervals of about 30s-1min to obtain each sample to be analyzed.

[0045] S12. Within the preset measurement time, the contact angle of each sample to be analyzed is measured to obtain the corresponding hydrophobic angle, and the fluorescence intensity of each sample to be analyzed is measured by a pre-built photoluminescence measurement device; wherein, the preset measurement time can be understood as a measurement operation time limit set based on ensuring the effectiveness of the hydrophobic angle measurement and the fluorescence intensity measurement. Since in actual applications, if the measurement time exceeds 5 minutes, the sample to be analyzed will become very dry, affecting the measurement result, the preset measurement time is preferably set to 5 minutes in this embodiment, that is, the total time from obtaining the sample to be analyzed to measuring the fluorescence intensity should be controlled to be completed within 5 minutes.

[0046] The above-mentioned step of measuring the contact angle of each sample to be analyzed to obtain the corresponding hydrophobic angle includes: measuring the advancing angle and the receding angle of each sample to be analyzed in turn to obtain the corresponding hydrophobic angle. The measurement can be implemented by referring to the prior art and will not be described here. After measuring the hydrophobic angle of each sample to be analyzed, a photoluminescence measurement device is used to perform photoluminescence measurement to obtain a preset number of corresponding fluorescence intensities;

[0047] Specifically, the photoluminescence measuring device is a device that can be used to directly measure the fluorescence intensity of the insulator surface at the operation and maintenance site, which effectively solves the application defect that the contact angle measuring instrument in the existing laboratory is difficult to measure directly on site, and the insulator to be tested for hydrophobicity needs to be brought back to the laboratory, resulting in a long power outage time; the photoluminescence measuring device is as follows Figure 3 As shown, it includes a control terminal, a nitrogen laser, a dye laser, a storage table, a long-pass filter and a fluorescence detector that are sequentially connected to form a loop; the long-pass filter includes an excitation light filter, an emission light filter, and a dichroic mirror disposed between the excitation light filter and the emission light filter; wherein the storage table can be understood as being used to place the insulator to be detected; correspondingly, the step of measuring the fluorescence intensity of each sample to be analyzed by a pre-built photoluminescence measurement device includes:

[0048] The control terminal starts the nitrogen laser to emit laser pulses, and inputs the laser pulses into the dye laser to excite and generate fluorescence, and projects the fluorescence onto the sample to be analyzed on the storage table;

[0049] The fluorescence on the surface of the sample to be analyzed is collected, processed by a long-pass filter, and then input into a fluorescence detector for fluorescence detection. The output signal of the fluorescence detector is input into a control terminal, and the maximum fluorescence intensity of the sample to be analyzed is taken as the corresponding fluorescence intensity.

[0050] Specifically, the above fluorescence intensity process can be understood as follows: the sample to be analyzed is placed on the table, and the control terminal starts the nitrogen laser through the relevant software control to emit a 3ns laser pulse at a wavelength of 337nm into the dye laser to excite and produce fluorescence, and the fluorescence is then directed to the sample to be analyzed on the table through the optical fiber. At this time, the pulse energy at the sample to be analyzed is about 1μJ. The fluorescence from the surface of the sample to be analyzed is collected by the optical fiber and filtered by a long-pass filter (435nm) before entering the fluorescence detector, so that the output signal is fed back to the control terminal and plotted as shown below. Figure 4 The fluorescence chromatogram shown in the figure is taken, and the maximum fluorescence intensity of the sample to be analyzed in the figure is determined as the measured fluorescence intensity; it should be noted that in order to avoid short-wavelength fluorescence interference as much as possible and better cooperate with the high-reflectivity binary mirror, the long-pass filter is set to 435nm, that is, the long-pass filter coating reflects shorter wavelengths and transmits longer wavelengths, thereby filtering out fluorescence with a wavelength lower than 435nm.

[0051] S13, fitting a hydrophobicity prediction model according to the hydrophobicity angle and fluorescence intensity of each sample to be analyzed; wherein the hydrophobicity prediction model can be understood as fitting according to the rules that the fluorescence intensity is the independent variable and the hydrophobicity angle is the dependent variable according to the hydrophobicity angle and fluorescence intensity data of a preset number of groups of samples to be analyzed obtained by measurement, and obtaining the following: Figure 5 Model showing the relationship between the hydrophobic angle and the fluorescence intensity.

[0052] S14, obtaining the measured fluorescence intensity of the insulator to be inspected through the photoluminescence measuring device, and inputting the measured fluorescence intensity into the hydrophobicity prediction model to obtain a corresponding hydrophobicity angle prediction value, and obtaining a hydrophobicity evaluation result according to the hydrophobicity angle prediction value; wherein, the method for obtaining the measured fluorescence intensity of the insulator to be inspected refers to the method for obtaining the fluorescence intensity of the sample to be analyzed, which will not be repeated here; when the measured fluorescence intensity obtained by the photoluminescence measuring device at the operation and maintenance site is input into the hydrophobicity prediction model, the corresponding hydrophobicity angle prediction value can be obtained, for example, Figure 4 The corresponding fluorescence intensities of insulator A and insulator B are shown as I A =1.20,I B =1.42, will I A and I B Substitute them into the hydrophobicity prediction model to obtain the corresponding hydrophobic angle n A =115°, n B =75°. After obtaining the predicted value of the hydrophobic angle of the insulator to be inspected, the current hydrophobic performance of the corresponding insulator to be inspected can be evaluated to determine whether the insulator needs to be replaced; specifically, the step of obtaining the hydrophobicity evaluation result according to the predicted value of the hydrophobic angle includes:

[0053] Determine whether the predicted value of the hydrophobic angle is less than the hydrophobic angle threshold. If so, the hydrophobicity evaluation result is determined to be a loss of hydrophobic performance. Otherwise, the hydrophobicity evaluation result is determined to be a good hydrophobic performance. The hydrophobic angle threshold is selected according to actual application requirements and is not specifically limited here. If the hydrophobic angle threshold is 90°, then Figure 4 The predicted value of the hydrophobic angle of insulator A is n A =115°>90°, the evaluation result is that the hydrophobic performance is good and can continue to be used, and n B =75°<90°, the evaluation result is that the hydrophobic performance is lost and it needs to be replaced in time.

[0054] In principle, the longer the insulator is in operation, the worse its hydrophobic performance is. In actual operation of the insulator, the hydrophobic performance may be abnormally lost due to the particularity of the operating environment. In order to timely perceive the abnormal impact caused by the abnormal operating environment, the present invention also conducts the following correlation analysis research on the situation where the hydrophobicity evaluation result is the loss of hydrophobicity, so as to ensure the safe use of the insulator for as long as possible. Specifically, the step of obtaining the hydrophobicity evaluation result according to the hydrophobic angle prediction value also includes:

[0055] If the hydrophobicity assessment result is a loss of hydrophobicity, the hydrophobicity and salt density values ​​of the associated insulators are randomly inspected; the batch, model, operating area and operating years of the associated insulators and the insulators to be tested corresponding to the hydrophobicity assessment result are the same; for example, in response to the problem of hydrophobicity loss of insulator B, other insulators of the same batch, model and operating years in the same operating area as insulator B are randomly inspected, and 8 insulators are randomly inspected, and their hydrophobicity (laboratory test) and salt density (equivalent attached salt density) are measured, and the inspection results shown in Table 1 are obtained.

[0056] Table 1 Inspection results of 8 insulators sampled

[0057]

[0058]

[0059] If more than the preset ratio of associated insulators have lost their hydrophobicity and their salt density values ​​are abnormal, it is determined that the corresponding loss of hydrophobicity is related to the degree of pollution in the operating area; the preset ratio is set according to the actual application requirements and is not specifically limited here; as shown in Table 1, through random inspection, it is found that the hydrophobicity of insulators of the same batch, model and age as insulator B is not very good (all less than 90°), and most of their salt density results are in the abnormal range (0.06-0.1mg / cm 2 ), and according to Q / GDW152-2006 "Electric Power System Pollution Area Classification and External Insulation Selection Standard", the pollution level in this area is C, which is heavily polluted; because pollutants have a certain corrosive effect on insulators, they will affect the hydrophobicity of the insulator surface. Based on the results of the random inspection, it can be determined that the loss of hydrophobicity of insulator B is related to the pollution in the area, and the analysis results are fed back to the relevant operation and maintenance personnel, so that the operation and maintenance personnel can strengthen the cleaning of the insulator surface during the subsequent daily operation and maintenance process, thereby ensuring the normal use of insulators in the area, extending their use time as much as possible, ensuring the safe operation of the transmission and distribution lines, and effectively reducing the operation and maintenance costs of each line.

[0060] In the embodiment of the present application, a preset number of insulator samples are made according to a preset size and immersed in distilled water in an increasing immersion time sequence to obtain samples to be analyzed, and within the preset measurement time, the contact angle of each sample to be analyzed is measured to obtain the corresponding hydrophobic angle, and after the fluorescence intensity of each sample to be analyzed is measured by a pre-built photoluminescence measurement device, a hydrophobicity prediction model is obtained by fitting the hydrophobic angle and fluorescence intensity of each sample to be analyzed, and after the measured fluorescence intensity of the insulator to be tested is obtained by the photoluminescence measurement device, the corresponding hydrophobic angle prediction value is obtained according to the hydrophobicity prediction model to perform hydrophobicity evaluation. The method can simply and effectively evaluate the hydrophobicity of the insulator at the operation and maintenance site to determine whether the insulator needs to be replaced, thereby becoming an effective alternative method for laboratory testing of the hydrophobicity of insulators, effectively solving the technical defects of the existing insulator hydrophobicity performance monitoring being too subjective and inaccurate, facilitating the maintenance of insulators, and providing reliable protection for the safe operation of transmission lines, and having important application value.

[0061] In one embodiment, Figure 6 As shown, a system for evaluating hydrophobicity of an insulator based on laser induced photoluminescence is provided, the system comprising:

[0062] The sample preparation module 1 is used to prepare a preset number of insulator samples according to a preset size, and soak each insulator sample in distilled water according to an increasing soaking time sequence to obtain a corresponding sample to be analyzed;

[0063] The data acquisition module 2 is used to measure the contact angle of each sample to be analyzed within a preset measurement time to obtain the corresponding hydrophobic angle, and to measure the fluorescence intensity of each sample to be analyzed by a pre-built photoluminescence measurement device;

[0064] Model fitting module 3, used for fitting a hydrophobicity prediction model according to the hydrophobic angle and fluorescence intensity of each sample to be analyzed;

[0065] The hydrophobicity evaluation module 4 is used to obtain the measured fluorescence intensity of the insulator to be tested through the photoluminescence measurement device, and input the measured fluorescence intensity into the hydrophobicity prediction model to obtain the corresponding hydrophobicity angle prediction value, and obtain the hydrophobicity evaluation result according to the hydrophobicity angle prediction value; wherein the photoluminescence measurement device includes a control terminal, a nitrogen laser, a dye laser, a storage table, a long-pass filter and a fluorescence detector which are connected in sequence to form a loop; the long-pass filter includes an excitation light filter, an emission light filter, and a dichroic mirror arranged between the excitation light filter and the emission light filter.

[0066] The specific definition of an insulator hydrophobicity evaluation system based on laser induced photoluminescence can be found in the above definition of an insulator hydrophobicity evaluation method based on laser induced photoluminescence, which will not be repeated here. Each module in the above-mentioned insulator hydrophobicity evaluation system based on laser induced photoluminescence can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0067] Figure 7 FIG. 1 shows an internal structure diagram of a computer device in an embodiment, and the computer device may specifically be a terminal or a server. Figure 7 As shown, the computer device includes a processor, a memory, a network interface, a display and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for evaluating the hydrophobicity of an insulator based on laser induced photoluminescence is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the computer device housing, or an external keyboard, touchpad or mouse, etc.

[0068] It can be understood by those skilled in the art that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the present application scheme, and does not constitute a limitation on the computer device to which the present application scheme is applied. The specific computing device may include more or fewer components than shown in the figure, or combine certain components, or have the same component arrangement.

[0069] In one embodiment, a computer device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the steps of the above method are implemented when the processor executes the computer program.

[0070] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above method are implemented.

[0071] In summary, the embodiments of the present invention provide a method, system, computer device and storage medium for evaluating the hydrophobicity of an insulator based on laser induced photoluminescence. The method for evaluating the hydrophobicity of an insulator based on laser induced photoluminescence realizes that a preset number of insulator samples made according to a preset size are immersed in distilled water according to an increasing immersion time sequence to obtain samples to be analyzed, and within a preset measurement time, the contact angle of each sample to be analyzed is measured to obtain the corresponding hydrophobic angle, and after the fluorescence intensity of each sample to be analyzed is measured by a pre-built photoluminescence measurement device, the hydrophobic angle and the fluorescence intensity of each sample to be analyzed are simulated. The invention discloses a technical scheme of obtaining a hydrophobicity prediction model by combining the laser induced photoluminescence technology and the surface hydrophobicity of the insulator to obtain the measured fluorescence intensity of the insulator to be inspected through a photoluminescence measuring device, and then obtaining the corresponding hydrophobicity angle prediction value according to the hydrophobicity prediction model to evaluate the hydrophobicity. By linking the laser induced photoluminescence technology with the surface hydrophobicity of the insulator, the technical defects of the existing insulator hydrophobicity performance monitoring, that is, excessive subjectivity and inaccurate monitoring, are effectively solved. It becomes an effective alternative method for laboratory inspection of the hydrophobicity of insulators, can simply and effectively detect the surface hydrophobicity of the insulator, is convenient for the maintenance of the insulator, and provides a reliable guarantee for the safe operation of the transmission line, and has important application value.

[0072] Each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment can be directly referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. It should be noted that the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-mentioned embodiments only express several preferred implementation modes of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in the technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be based on the protection scope of the claims.

Claims

1. A method for evaluating the hydrophobicity of insulators based on laser-induced photoluminescence. It is characterized in that The method comprises the following steps: A preset number of insulator samples are prepared according to a preset size, and each insulator sample is immersed in distilled water according to an increasing immersion time sequence to obtain a corresponding sample to be analyzed; the material of the insulator sample is high temperature vulcanized silicone rubber; Within a preset measurement time, the contact angle of each sample to be analyzed is measured to obtain the corresponding hydrophobic angle, and the fluorescence intensity of each sample to be analyzed is measured by a pre-built photoluminescence measurement device; According to the hydrophobic angle and fluorescence intensity of each sample to be analyzed, a hydrophobicity prediction model is fitted; Obtaining the measured fluorescence intensity of the insulator to be inspected by the photoluminescence measuring device, and inputting the measured fluorescence intensity into the hydrophobicity prediction model to obtain a corresponding hydrophobicity angle prediction value, and obtaining a hydrophobicity evaluation result according to the hydrophobicity angle prediction value; The photoluminescence measuring device comprises a control terminal, a nitrogen laser, a dye laser, a storage table, a long-pass filter and a fluorescence detector which are connected in sequence to form a loop; the long-pass filter comprises an excitation light filter, an emission light filter, and a dichroic mirror arranged between the excitation light filter and the emission light filter; the nitrogen laser emits laser pulses with a wavelength of 337 nm; and the long-pass filter filters out fluorescence with a wavelength lower than 435 nm.

2. The method for evaluating hydrophobicity of an insulator based on laser induced photoluminescence according to claim 1, It is characterized in that The step of soaking each insulator sample in distilled water according to an increasing soaking time sequence to obtain the corresponding sample to be analyzed includes: After each insulator sample is soaked for a corresponding soaking time, each insulator sample taken out from the distilled water is sprayed with distilled water within a preset distance, and the surface is wiped dry with a paper towel to obtain a corresponding sample to be analyzed.

3. The method for evaluating hydrophobicity of an insulator based on laser induced photoluminescence according to claim 1, It is characterized in that The step of measuring the fluorescence intensity of each sample to be analyzed by a pre-built photoluminescence measuring device comprises: The control terminal starts the nitrogen laser to emit laser pulses, and inputs the laser pulses into the dye laser to excite and generate fluorescence, and projects the fluorescence onto the sample to be analyzed on the storage table; The fluorescence on the surface of the sample to be analyzed is collected, processed by a long-pass filter, and then input into a fluorescence detector for fluorescence detection. The output signal of the fluorescence detector is input into a control terminal, and the maximum fluorescence intensity of the sample to be analyzed is taken as the corresponding fluorescence intensity.

4. The method for evaluating hydrophobicity of an insulator based on laser induced photoluminescence according to claim 1, It is characterized in that The step of obtaining a hydrophobicity evaluation result according to the hydrophobic angle prediction value comprises: It is determined whether the predicted value of the hydrophobic angle is less than the hydrophobic angle threshold value. If so, the hydrophobicity evaluation result is determined to be a loss of hydrophobic performance. Otherwise, the hydrophobicity evaluation result is determined to be a good hydrophobic performance.

5. The method for evaluating hydrophobicity of an insulator based on laser induced photoluminescence according to claim 1, It is characterized in that The step of obtaining a hydrophobicity evaluation result according to the hydrophobic angle prediction value further includes: If the hydrophobicity assessment result is a loss of hydrophobicity, the hydrophobicity and salt density values ​​of the associated insulators are randomly inspected; the batch, model, operating area and operating years of the associated insulators and the insulator to be tested corresponding to the hydrophobicity assessment result are the same; If more than a preset proportion of associated insulators have a loss of hydrophobicity and an abnormal salt density value, it is determined that the corresponding loss of hydrophobicity is related to the degree of pollution in the operating area.

6. A system for evaluating the hydrophobicity of insulators based on laser-induced photoluminescence. It is characterized in that The system comprises: A sample preparation module is used to prepare a preset number of insulator samples according to a preset size, and soak each insulator sample in distilled water according to an increasing soaking time sequence to obtain a corresponding sample to be analyzed; the material of the insulator sample is high temperature vulcanized silicone rubber; A data acquisition module is used to measure the contact angle of each sample to be analyzed within a preset measurement time to obtain the corresponding hydrophobic angle, and to measure the fluorescence intensity of each sample to be analyzed by a pre-built photoluminescence measurement device; A model fitting module is used to fit a hydrophobicity prediction model according to the hydrophobic angle and fluorescence intensity of each sample to be analyzed; A hydrophobicity evaluation module, used to obtain the measured fluorescence intensity of the insulator to be tested through the photoluminescence measurement device, and input the measured fluorescence intensity into the hydrophobicity prediction model to obtain the corresponding hydrophobicity angle prediction value, and obtain the hydrophobicity evaluation result according to the hydrophobicity angle prediction value; The photoluminescence measuring device comprises a control terminal, a nitrogen laser, a dye laser, a storage table, a long-pass filter and a fluorescence detector which are connected in sequence to form a loop; the long-pass filter comprises an excitation light filter, an emission light filter, and a dichroic mirror arranged between the excitation light filter and the emission light filter; the nitrogen laser emits laser pulses with a wavelength of 337 nm; and the long-pass filter filters out fluorescence with a wavelength lower than 435 nm.

7. A computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, It is characterized in that When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium having a computer program stored thereon, It is characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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