A nondestructive detection device and method for salt density contamination of insulators of electrical equipment

Abstract

The present invention discloses a nondestructive testing device for salt-dense pollution of insulators of electrical equipment. The nondestructive testing device includes a signal acquisition unit, an electronic imaging detection unit, a manual observation unit, and a background terminal. The above devices and matching methods are used to complete the acquisition, conversion, imaging, detection, and comparison of optical signals. After AI artificial intelligence algorithm and model comparison analysis, the artificial auxiliary analysis and judgment technology is superimposed to realize the integration of electronic optical imaging and optical nondestructive testing to realize the non-disassembly and non-removal detection of salt-dense pollution of insulators of electrical equipment. The detection difficulty is reduced, and the technical guarantee of power grid operation and maintenance and stable operation is improved.

Description

Technical Field

[0001] The present application relates to the technical field of electrical equipment pollutant detection, and in particular to a device and method for nondestructive detection of salt density contamination of insulators of electrical equipment. Background Art

[0002] During the operation of the power grid, impurities such as salt density can cause partial discharge, high-voltage arcing of insulator strings, corona discharge and other faults. Long-term hidden faults and defects that cannot be eliminated can easily lead to power accidents. The insulation value measurement, surface cleaning, maintenance and inspection of substation insulation electrical equipment need to be based on the judgment of factors such as region, climate, temperature and humidity, and geographical environment, and effective plans should be implemented to ensure the stable operation of the power grid.

[0003] The insulation defects and fault diagnosis of existing substation equipment basically rely on big data analysis and handheld wireless indirect and direct contact equipment for detection. The insulation fault diagnosis and fault detection management of some special substation equipment also rely on the daily inspection, maintenance, test data and historical experience of the substation equipment for judgment. Insulation faults of some special equipment such as underground cable joints, transformer studs, pole-mounted insulation switches, GIS switches, sulfur hexafluoride (SF6 insulating gas) devices, etc. require disassembly of the equipment casing and its main insulation components, power outages for insulation fault maintenance, and lack of dynamic monitoring data to warn of development trends before insulation faults or defects occur. With the support of objective and scientific data analysis, effective insulation status evaluation can be made to judge the health of insulation components of substation equipment.

[0004] Cutting off power, disassembling the equipment casing and its main insulating components, and then testing them for contaminants will not only have a great impact on the overall power supply, but also reduce the service life of the equipment due to frequent disassembly of the equipment. Therefore, designing a device that can detect the degree of contamination of the equipment without disassembling the equipment is of great significance for the detection of salt-dense contaminants in insulating components. Summary of the invention

[0005] The present application provides a device and method for nondestructive detection of salt density contamination of insulators of electrical equipment, so as to solve the problem in the prior art that the equipment needs to be disassembled in order to detect the salt density contamination degree of insulating equipment.

[0006] In a first aspect, an embodiment of the present application provides a nondestructive detection device for salt density contamination of insulators of electrical equipment, comprising:

[0007] Electronic imaging detection unit;

[0008] A signal collection unit located on one side of the electronic imaging detection unit, the signal collection unit comprising a signal multiplier, a photoelectric sensor, a filter, and an objective lens coaxially arranged in sequence in a direction away from the electronic imaging detection unit;

[0009] An artificial observation unit is located at a side of the electronic imaging detection unit away from the signal acquisition unit, and the artificial observation unit is coaxial with the signal acquisition unit;

[0010] A background terminal wirelessly connected to the electronic imaging detection unit;

[0011] The filter is configured to obtain a first light signal collected by the objective lens, and filter the first light signal to obtain a second light signal;

[0012] The photoelectric sensor is configured to acquire a second optical signal and convert the second optical signal into a first electrical signal;

[0013] The signal multiplier is configured to perform signal multiplication processing on the first electrical signal to obtain a second electrical signal;

[0014] The electronic imaging detection unit is configured to acquire a second electrical signal, convert the second electrical signal into an electronic visible image, and present the image to the manual observation unit;

[0015] The electronic imaging detection unit is further configured to determine whether the electronic visible image is clear and discernible;

[0016] If it is discernible, converting the electronic visible image into a second electrical signal and sending it to a back-end terminal;

[0017] The background terminal is configured to obtain the second electrical signal, perform superposition processing on the second electrical signal to form a third electrical signal, and perform intelligent comparison based on the third electrical signal to obtain a judgment result of the degree of contamination.

[0018] In the nondestructive testing equipment provided in the embodiment of the present application, the signal acquisition unit can obtain the reflected and refracted light signals of the equipment to be tested, and filter, convert, and multiply the light signals, thereby obtaining the electrical signals required by the electronic imaging detection unit. The electronic imaging detection unit converts the electrical signals into wave images and detects the wave images, thereby achieving photoelectric nondestructive testing of insulating equipment through artificial intelligence and manual assisted detection.

[0019] Furthermore, a photomultiplier tube is provided on the photoelectric sensor, and the photomultiplier tube is configured to convert a weak light signal in the second light signal into a weak electrical signal, and add the weak electrical signal into the first electrical signal.

[0020] In the nondestructive testing equipment provided in the embodiment of the present application, the signals in the reflected and refracted light of the detected salt-dense contamination are very weak, so a signal multiplier is designed in the previous equipment to amplify the electrical signal. Considering that some signals may be too weak to be converted into electrical signals in the photoelectric sensor, a photomultiplier tube is designed to convert the weaker signals in the optical signal into electrical signals.

[0021] Furthermore, a filter is provided between the signal multiplier and the electronic imaging detection unit, and the filter is configured to filter the second electrical signal.

[0022] In the nondestructive testing equipment provided in the embodiment of the present application, the filter is used to filter out electrical signal information that does not need to be considered.

[0023] Furthermore, the manual observation unit includes:

[0024] An eyepiece disposed at one end of the manual observation unit away from the electronic imaging detection unit;

[0025] A light shield disposed between the eyepiece and the electronic imaging detection unit;

[0026] The eyepiece is configured to present the electronic visible image sent by the electronic imaging detection unit.

[0027] In the nondestructive testing equipment provided in the embodiment of the present application, the manual observation unit is further designed to further increase the accuracy of the nondestructive testing equipment.

[0028] Furthermore, an image data storage device is provided on the electronic imaging detection unit;

[0029] The image data memory is configured to store a second electrical signal.

[0030] In the nondestructive testing device provided in the embodiment of the present application, the image data storage device is used to store the hydrophobic image data in the second electrical signal data. Storing the hydrophobic image data can realize data transfer and auxiliary result verification.

[0031] Furthermore, a detachably connected elevating tripod is provided below the electronic imaging detection unit, and a lifting adjustment rod is provided on the elevating tripod.

[0032] During the detection process, the detection device must also be adjusted accordingly due to the different heights of the equipment being detected. This can be achieved by setting up a liftable tripod. The tripod can be raised and lowered by adjusting the lifting adjustment rod to achieve specific work needs. The device's angle, height, direction, posture, etc. can be adjusted and changed at any time to facilitate image acquisition and real-time recording.

[0033] Furthermore, a high-performance lithium battery is arranged between the electronic imaging detection unit and the elevating tripod.

[0034] In conventional operations, the working environment is generally outdoors, so there is no fixed power supply. The installation of high-performance lithium batteries can achieve long-term outdoor operations and solve the problem of being unable to work due to the lack of a fixed power supply or short battery life.

[0035] Furthermore, the signal acquisition unit is provided with a laser light source close to one end of the objective lens.

[0036] In the nondestructive testing equipment provided in the embodiment of the present application, a laser light source is arranged at one end of the objective lens, and the spectral quality of the spectral image collected from the object under test can be improved and the spectral image effect can be enhanced through a specially customized laser light source generating device.

[0037] In a second aspect, an embodiment of the present application provides a method for nondestructive detection of salt density contamination of insulators of electrical equipment, the nondestructive detection method comprising the following steps:

[0038] Acquire a first optical signal;

[0039] Filtering the acquired first optical signal to generate a second optical signal;

[0040] converting the second optical signal into a first electrical signal;

[0041] Multiplying the first electrical signal to generate a second electrical signal;

[0042] converting the second electrical signal into an electronically visible image;

[0043] presenting the electronic visible image on a manual observation unit;

[0044] Determining whether the electronic visible image is clear and discernible;

[0045] If it is recognizable, the electronic visible image is converted into the second electrical signal and sent to the background terminal. The background terminal performs superposition processing on the second electrical signal to obtain a third electrical signal. Based on the third electrical signal, intelligent comparison is performed to obtain a result of the degree of contamination.

[0046] Furthermore, the intelligent comparison includes: spectral image data comparison, grating characteristic data comparison, and wavelength data comparison. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the embodiments are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0048] Figure 1 A schematic diagram of a nondestructive detection device for salt density contamination of insulators of electrical equipment in an embodiment;

[0049] Figure 2 The present invention is a flow chart of a method for nondestructive testing of salt-density contamination of insulators of electrical equipment in one embodiment.

[0050] In the figure: 1-signal acquisition unit; 11-objective lens; 12-filter; 13-photoelectric sensor; 131-photomultiplier tube; 14-signal multiplier; 15-filter; 2-electronic imaging detection unit; 3-artificial observation unit; 31-eyepiece; 32-light shield; 4-backstage terminal; 5-high-performance lithium battery; 6-liftable tripod; 61-lifting adjustment rod; 7-image data storage; 8-laser light source. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. 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.

[0052] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art of the technology described in the embodiments of the present invention.

[0053] The monitoring of the insulation health status of power equipment has always been a necessary means to maintain the stable operation of substation equipment and reduce faults and defects such as flashover, pollution flashover, and temperature anomalies in power grid equipment. Part of the insulating medium is damaged by external forces, and the salt density level is not accurately determined, resulting in partial discharge, high-voltage electric creep, corona discharge and other faults. Long-term hidden faults and defects cannot be eliminated, which can easily lead to power accidents. The insulation properties, operation, maintenance and detection of substation insulation equipment basically rely on relatively single and scattered technical equipment means to carry out equipment insulation fault diagnosis and equipment insulation component damage status identification.

[0054] In most cases, salt-dense contamination of insulation components of substation equipment often results in the following situations:

[0055] 1. Cracks or flashover of zero-value insulators in suspended porcelain insulation;

[0056] 2. Corona discharge and surface partial discharge of the external insulation of the equipment cause partial or overall overheating of the equipment;

[0057] 3. Micro cracks on pillar insulation cannot be detected in time and discovered early;

[0058] 4. The degree of conductivity contamination on the insulation surface of the insulation equipment cannot be determined and identified;

[0059] 5. The external insulators of the substation equipment in operation are prone to flashover, causing partial discharge and temperature rise of the equipment;

[0060] 6. The joints of insulating equipment components are prone to overlap with metal, causing the insulation performance of the equipment to deteriorate, resulting in flashover and partial discharge, leading to increased temperature at the connection parts of the equipment and the risk of short circuit and grounding of the equipment.

[0061] It can be understood that since salt density pollution has a great impact on electrical equipment, the salt density pollution level of the equipment must be tested. In the prior art, in order to determine the salt density pollution level of insulating equipment, it is necessary to disassemble the insulating equipment into scattered individuals and perform salt density testing on the insulating components. Daily inspections and frequent disassembly of equipment will inevitably have a great impact on the equipment. Therefore, based on how to solve the problem of non-destructive testing of the salt density pollution level of insulating equipment, the present application proposes the following implementation methods.

[0062] refer to Figure 1 , which is a schematic diagram of a nondestructive detection device for salt density contamination of insulators of electrical equipment according to an embodiment of the present application;

[0063] Depend on Figure 1 It can be seen that the present application provides a nondestructive testing device for salt density contamination of insulators of electrical equipment, and the nondestructive testing device comprises:

[0064] Electronic imaging detection unit 2;

[0065] A signal acquisition unit 1 located at one side of the electronic imaging detection unit 2, wherein the signal acquisition unit 1 comprises a signal multiplier 14, a photoelectric sensor 13, a filter 12, and an objective lens 11 which are coaxially arranged in sequence in a direction away from the electronic imaging detection unit 2;

[0066] An artificial observation unit 3 is located at a side of the electronic imaging detection unit 2 away from the signal acquisition unit 1, and the artificial observation unit 3 is coaxial with the signal acquisition unit 1;

[0067] A backend terminal 4 wirelessly connected to the electronic imaging detection unit 2;

[0068] The filter 12 is configured to obtain the first light signal collected by the objective lens 11, and filter the first light signal to obtain a second light signal;

[0069] The photoelectric sensor 13 is configured to acquire the second optical signal and convert the second optical signal into a first electrical signal;

[0070] The signal multiplier 14 is configured to perform signal multiplication processing on the first electrical signal to obtain a second electrical signal;

[0071] The electronic imaging detection unit 2 is configured to obtain a second electrical signal, convert the second electrical signal into an electronic visible image and present it to the manual observation unit 3;

[0072] The electronic imaging detection unit 2 is also configured to determine whether the electronic visible image is clear and discernible;

[0073] If it is recognizable, the electronic visible image is converted into a second electrical signal and sent to the back-end terminal 4;

[0074] The background terminal 4 is configured to obtain the second electrical signal, perform superposition processing on the second electrical signal to form a third electrical signal, and perform intelligent comparison based on the third electrical signal to obtain a judgment result of the degree of contamination.

[0075] Specifically, in this embodiment, the signal acquisition unit 1 acquires the reflected and refracted light of the device to be detected. Here, the signal acquisition unit 1 uses the characteristic that the optical sensor is not disturbed in the electric field and combines the propagation and refraction characteristics of light on the surface of the insulating medium to complete the acquisition of the optical signal of the device to be detected;

[0076] Among them, in this embodiment, the first component for obtaining the optical signal is the objective lens 11 in the signal acquisition unit 1, and the objective lens 11 obtains the first optical signal; wherein, there are many types of the objective lens 11, and the objective lens 11 described in the present application is made by bonding a wide-angle and large-focal-length lens and an ultraviolet light lens, wherein the wide-angle and large-focal-length lens can magnify the degree of surface contaminants of the measured object by several times through photoelectric technology, and provide high-definition images and spectrum photos to the visible light lens, and the ultraviolet light objective lens adopts an ultraviolet spectrum illumination system made of purple crystal quartz and special materials, which can reasonably filter visible light when collecting the surface contaminant spectrum of the insulator, so that it can reasonably collect the pollutant picture on the surface of the equipment, form a pollutant detection ultraviolet optical spectrum, and can measure the surface temperature of the equipment at the same time. It should be noted that this application only needs to detect and process visible light and ultraviolet light, but if there is a need to observe infrared related data, the infrared light lens can be used together with the objective lens 11 described in this application to obtain other data such as infrared spectrum.

[0077] However, there is a large amount of information in the first optical signal that does not match the information to be detected in this application. Therefore, it is necessary to filter the acquired first optical signal. The first optical signal is filtered using a filter 12 to filter out light waves whose wavelengths and bands do not match the spectrum and chromatographic image of the collected light source, and obtain a second optical signal after preliminary filtering.

[0078] Specifically, in the present embodiment, the photoelectric sensor 13 converts the second optical signal into a first electrical signal that can be processed for imaging; and the light refraction signal of the salt-dense pollution described in the present application is generally relatively weak, so in order to make the detection result more accurate, a signal multiplier 14 is provided, and the signal multiplier 14 can amplify the first electrical signal by at least 20,000 times and obtain a second electrical signal, thereby solving the problem of weak salt-dense pollution signals.

[0079] Specifically, in this embodiment, the electronic imaging detection unit 2 converts the second electrical signal into an electronic visible image for preliminary detection, and presents the electronic visible image on the manual observation unit 3 for manual observation of relevant data information of salt density pollution. The electronic imaging detection unit 2 also has the function of judging whether the electronic visible image is clear and discernible. If it is not discernible, the operator will perform manual detection on the manual observation unit 3. If it is discernible, the electronic visible image will be converted into a second electrical signal and sent to the background terminal 4. The background terminal 4 will superimpose the second electrical signal to obtain a third electrical signal, perform intelligent comparison based on the third electrical signal, and finally obtain the judgment result of the pollution degree.

[0080] Preferably, a photomultiplier tube 131 is provided on the photoelectric sensor 13, and the photomultiplier tube 131 is configured to convert a weak light signal in the second light signal into a weak electric signal, and add the weak electric signal into the first electric signal.

[0081] Specifically, in this embodiment, the signal of salt-dense contamination to be detected by the present application is very weak. Therefore, in order to convert the necessary data signal into an electrical signal, the weaker part of the signal is converted into an electrical signal before the electrical signal is multiplied. Therefore, a photomultiplier tube 131 is provided to realize the conversion of the weaker part of the signal into an electrical signal, thereby further improving the detection accuracy of the nondestructive testing device described in the present application.

[0082] Preferably, a filter 15 is disposed between the signal multiplier 14 and the electronic imaging detection unit 2 , and the filter 15 is configured to filter the second electrical signal.

[0083] Specifically, in this embodiment, since the signal multiplier 14 multiplies the original first electrical signal, after the multiplication process, not only the signal required by the present application is amplified, but also many originally very weak and unnecessary signals are amplified. The filter 12 cannot filter out these signals because they are too weak, so a second filtering is required. The filter 15 is set to filter out these unnecessary signals, thereby eliminating the interference of these unnecessary signals on the detection.

[0084] Preferably, the manual observation unit 3 comprises:

[0085] An eyepiece 31 disposed at one end of the manual observation unit 3 away from the electronic imaging detection unit 2;

[0086] A light shield 32 disposed between the eyepiece 31 and the electronic imaging detection unit 2;

[0087] The eyepiece 31 is configured to present the electronic visible image sent by the electronic imaging detection unit 2 .

[0088] Specifically, in the present embodiment, the manual observation unit 3 is further designed, and the light shield 32 is arranged at one end of the eyepiece 31. The observation of the eyepiece 31 is generally performed with the naked eye, so a large amount of external light will affect the observation of the image. The light shield 32 can be used to filter the strong light and interference light visible to the naked eye, thereby ensuring that the eyepiece 31 sees suitable and clear atlas data. It should be noted that the light shield 32 can take many forms, which are not limited here.

[0089] Preferably, the electronic imaging detection unit 2 is provided with an image data storage device 7;

[0090] The image data memory 7 is configured to store the second electrical signal.

[0091] Specifically, the image data storage device 7 described in the present application is used to store the hydrophobic image data in the second electrical signal data. Storing the hydrophobic image data can realize data transfer and verify the auxiliary results.

[0092] Insulator equipment is hydrophobic. The dirty and wet environment causes the surface to condense into discrete droplets, which alternate with the dry areas on the surface, causing the electric field on the surface of the insulator to be distorted. When the electric field strength in the dry areas between the droplets reaches the breakdown electric field strength of the air, the insulator will produce intermittent partial discharge under very low voltage conditions. The existence of the discharge arc weakens or even loses the hydrophobicity around the droplets, accelerates the development of the local arc and eventually forms a flashover. The image data formed after the flashover discharge can assist the detection results and play a role in verifying the detection results.

[0093] Preferably, a detachably connected elevating tripod 6 is provided below the electronic imaging detection unit 2 , and a elevating adjustment rod 61 is provided on the elevating tripod 6 .

[0094] Preferably, a high-performance lithium battery 5 is arranged between the electronic imaging detection unit 2 and the liftable tripod 6 .

[0095] Specifically, during the detection process, the nondestructive testing device must also be adjusted accordingly due to the different heights of the equipment being detected. This can be achieved by providing a liftable tripod 6. The tripod can be raised and lowered by adjusting the lift adjustment rod 61 to achieve specific operational requirements. The angle, height, direction, posture, etc. of the device can be adjusted and changed at any time to facilitate image acquisition and real-time recording.

[0096] In conventional operations, the working environment is generally outdoors, so there is no fixed power supply. The high-performance lithium battery 5 can realize long-term outdoor operations and solve the problem of being unable to work due to the lack of a fixed power supply or short battery life.

[0097] Therefore, the liftable tripod 6 and the high-performance lithium battery 5 can be used together to solve the above problems.

[0098] Preferably, the signal acquisition unit 1 is provided with a laser light source 8 near one end of the objective lens 11 .

[0099] Specifically, the laser light source 8 is disposed at one end of the signal acquisition unit 1 close to the objective lens 11, so as to improve the spectral quality of the spectral image acquired from the measured object and enhance the spectral image effect.

[0100] It can be seen from the above embodiments that the working principle of the nondestructive detection device for salt density contamination of insulators of electrical equipment provided by the present application is:

[0101] A signal acquisition unit 1 is provided at the front end of the nondestructive testing device. The signal acquisition unit is equipped with an objective lens 11 and a filtering technology, which can effectively filter out background light and other light. The background light brightness on the insulating equipment to be tested is reduced. The signal multiplier 14 and the specially customized laser light source 8 can adjust the light of the object to be tested and amplify the electronic image information. The electronic visible image is detected by the electronic imaging detection unit 2. The operator can use the manual observation unit 3 and the background terminal 4 to perform intelligent processing and scientific comparative analysis on the salt density pollution image of the insulator surface detected by the ultraviolet optical nondestructive testing equipment through convenient operations.

[0102] Depend on Figure 2 It can be seen that the present application provides a photoelectric nondestructive detection method for dust and dense contaminants of insulators of electrical equipment, and the method comprises the following steps:

[0103] Acquire a first optical signal;

[0104] Specifically, the acquisition of the first light signal is completed by the objective lens 11, and the first light signal includes visible light data and ultraviolet light data. It should be noted that the requirement of this application is only for the detection of relevant data of visible light and ultraviolet light, but if there is infrared light related data to be detected, it can be achieved by adding an infrared light lens.

[0105] Filtering the acquired first optical signal to generate a second optical signal;

[0106] Specifically, the filtering process of the first optical signal and the generation of the second optical signal are completed by the optical filter 12. The optical filter 12 is used to perform a first filtering process on the first optical signal to filter out light waves whose wavelengths and bands do not match the spectrum and chromatographic image of the collected light source, and obtain the second optical signal after preliminary filtering.

[0107] converting the second optical signal into a first electrical signal;

[0108] Specifically, the conversion of the second optical signal into the first electrical signal is completed by the photoelectric sensor 13, wherein the first electrical signal data mainly includes: spectral image data, grating characteristics, and wavelength. However, it should be noted that the present application mainly detects these three items of data, but it is not only possible to obtain these three types of data, and other data can be obtained according to needs.

[0109] Multiplying the first electrical signal to generate a second electrical signal;

[0110] Specifically, the signal multiplier 14 is used to multiply the first electrical signal and generate the second electrical signal. The signal multiplier 14 perfectly solves the problem that the salt-dense pollution signal is too weak to be detected. The signal multiplication factor of the signal multiplier 14 can be determined according to demand. After the first electrical signal is multiplied, it is filtered for the second time. The second filtering is completed by the filter 15, and the filter 15 further filters out the signal without demand.

[0111] converting the second electrical signal into an electronically visible image;

[0112] Specifically, in this embodiment, the visible optical image is a spectral image, a grating characteristic image, and a wavelength image. However, it should be noted that the solution described in the present application only requires the above three types of images. It does not mean that the device can only provide these three types of images. Other images, such as infrared spectral images, etc., are not limited here.

[0113] presenting the electronic visible image on a manual observation unit;

[0114] Determining whether the electronic visible image is clear and discernible;

[0115] If it is recognizable, the electronic visible image is converted into the second electrical signal and sent to the background terminal. The background terminal performs superposition processing on the second electrical signal to obtain a third electrical signal. Based on the third electrical signal, intelligent comparison is performed to obtain a result of the degree of contamination.

[0116] Preferably, the intelligent comparison includes: spectral image data comparison, grating characteristic data comparison, and wavelength data comparison.

[0117] Specifically, there are two method paths for judging the result of the pollution degree. One is to compare the image on the manual observation unit 3 only by human eye detection when the electronic visible image is not discernible. The other is to send the second electrical signal data to the background terminal 4 when the electronic visible image is discernible. The background terminal 4 performs superposition processing on the second electrical signal data to form a third electrical signal data, and performs intelligent comparison based on the third electrical signal data, wherein the comparison content is: spectral image data comparison, grating characteristic data comparison, wavelength data comparison. It should be noted that the comparison of the above three types of data in this application is in accordance with the requirements of the solution of this application, but it is not limited to the above three types of data. If there are other requirements, they can be changed according to the requirements.

[0118] The present application provides a nondestructive detection device and method for salt-dense contamination of insulators of electrical equipment. The nondestructive detection device includes a signal acquisition unit 1, an electronic imaging detection unit 2, a manual observation unit 3, and a background terminal 4. The signal acquisition unit 1 is configured to collect, filter, convert, and multiply light signals, and transmit the first light signal collected by the objective lens 11 to the filter 12. The filter 12 is configured to filter the first light signal to obtain a second light signal, and transmit the second light signal to a photoelectric sensor 13. The photoelectric sensor 13 converts the second light signal into a first electrical signal and transmits it to a signal multiplier 14. The signal multiplier 14 is It is configured to multiply the first electrical signal to obtain a second electrical signal, and transmit the second electrical signal to the electronic imaging detection unit 2. The electronic imaging detection unit 2 is configured to convert the second electrical signal into an electronic visible image and present it on the manual observation unit 3. The electronic imaging detection unit 2 determines whether the electronic visible image is clear and discernible. If it is discernible, the original second electrical signal data is sent to the background terminal 4 wirelessly. The background terminal 4 is configured to obtain the second electrical signal data, superimpose the second electrical signal data to form a third electrical signal data, and perform intelligent comparison based on the third electrical signal data to obtain a judgment result on the degree of contamination.

[0119] The present invention uses the conversion between optical visual nondestructive testing and photoelectric signals to detect pollutants without disassembling the insulating equipment to be tested. The above equipment and matching methods are used to complete the acquisition, conversion, imaging, detection, and comparison of optical signals. After AI artificial intelligence algorithm and model comparison analysis, the artificial auxiliary analysis and judgment technology is superimposed to realize the integration of electronic optical imaging and optical nondestructive testing to realize the non-disassembly and non-removal detection of salt density pollution of electrical equipment insulators. The difficulty of detection is reduced, and the technical guarantee of power grid operation and maintenance and stable operation is improved.

[0120] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A nondestructive testing device for salt density contamination of insulators of electrical equipment, characterized in that: The nondestructive testing device comprises: Electronic imaging detection unit (2); A signal collection unit (1) located on one side of the electronic imaging detection unit (2), the signal collection unit (1) comprising a signal multiplier (14), a photoelectric sensor (13), a filter (12), and an objective lens (11) which are coaxially arranged in sequence in a direction away from the electronic imaging detection unit (2); An artificial observation unit (3) is located on a side of the electronic imaging detection unit (2) away from the signal collection unit (1), and the artificial observation unit (3) is coaxial with the signal collection unit (1); A background terminal (4) wirelessly connected to the electronic imaging detection unit (2); The filter (12) is configured to obtain a first optical signal collected by the objective lens (11), and filter the first optical signal to obtain a second optical signal; The photoelectric sensor (13) is configured to acquire a second optical signal and convert the second optical signal into a first electrical signal; A photomultiplier tube (131) is arranged on the photoelectric sensor (13), and the photomultiplier tube (131) is configured to convert a weak light signal in the second light signal into a weak electric signal, and add the weak electric signal to the first electric signal; The signal multiplier (14) is configured to perform signal multiplication processing on the first electrical signal to obtain a second electrical signal; The electronic imaging detection unit (2) is configured to obtain a second electrical signal, convert the second electrical signal into an electronic visible image, and present the electronic visible image to the manual observation unit (3); The electronic imaging detection unit (2) is further configured to determine whether the electronic visible image is clear and discernible; If it is recognizable, converting the electronic visible image into a second electrical signal and sending it to a back-end terminal (4); The background terminal (4) is configured to obtain the second electrical signal, perform superposition processing on the second electrical signal to form a third electrical signal, and perform intelligent comparison based on the third electrical signal to obtain a judgment result of the degree of contamination.

2. The nondestructive testing device for salt density contamination of insulators of electrical equipment according to claim 1, characterized in that: A filter (15) is provided between the signal multiplier (14) and the electronic imaging detection unit (2), and the filter (15) is configured to filter the second electrical signal.

3. The nondestructive testing device for salt density contamination of insulators of electrical equipment according to claim 2, characterized in that: The manual observation unit (3) comprises: An eyepiece (31) disposed at one end of the manual observation unit (3) away from the electronic imaging detection unit (2); A light shield (32) disposed between the eyepiece (31) and the electronic imaging detection unit (2); The eyepiece (31) is configured to present the electronic visible image sent by the electronic imaging detection unit (2).

4. The nondestructive testing device for salt density contamination of insulators of electrical equipment according to claim 3, characterized in that: An image data storage device (7) is provided on the electronic imaging detection unit (2); The image data storage (7) is configured to store the second electrical signal.

5. The nondestructive testing device for salt density contamination of insulators of electrical equipment according to claim 4, characterized in that: A detachably connected and elevating tripod (6) is provided below the electronic imaging detection unit (2), and a lifting and lowering adjustment rod (61) is provided on the elevating tripod (6).

6. The nondestructive testing device for salt density contamination of insulators of electrical equipment according to claim 5, characterized in that: A high-performance lithium battery (5) is arranged between the electronic imaging detection unit (2) and the elevating tripod (6).

7. The nondestructive testing device for salt density contamination of insulators of electrical equipment according to claim 6, characterized in that: The signal collection unit (1) is provided with a laser light source (8) close to one end of the objective lens (11).

8. A nondestructive testing method for salt density contamination of insulators of electrical equipment, applied to the nondestructive testing device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Acquire a first optical signal; Filtering the acquired first optical signal to generate a second optical signal; converting the second optical signal into a first electrical signal; Multiplying the first electrical signal to generate a second electrical signal; converting the second electrical signal into an electronically visible image; presenting the electronic visible image on a manual observation unit; Determining whether the electronic visible image is clear and discernible; If it is recognizable, the electronic visible image is converted into the second electrical signal and sent to the background terminal. The background terminal performs superposition processing on the second electrical signal to obtain a third electrical signal. Based on the third electrical signal, intelligent comparison is performed to obtain a result of the degree of contamination.

9. A nondestructive testing method for salt density contamination of insulators of electrical equipment according to claim 8, characterized in that: The intelligent comparison includes: spectral image data comparison, grating characteristic data comparison, and wavelength data comparison.

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