CN111289860A - Method for detecting partial discharge position of electrical equipment - Google Patents
Method for detecting partial discharge position of electrical equipment Download PDFInfo
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- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
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Abstract
The application discloses a method for detecting a partial discharge position of electrical equipment, which comprises the following steps: collecting and shooting electromagnetic wave signals of target electrical equipment to respectively obtain an electromagnetic wave image and a visible light image and mark position information; respectively processing the electromagnetic wave image and the visible light image to respectively obtain an electromagnetic wave HIS color component value and a visible light HIS color component value in an HIS color space; fusing the electromagnetic wave HIS color component value marked with the same position information and the visible light HIS color component value to obtain a fused color component value; obtaining a fused image according to the fused color component values; comparing the visible light image with the fused image; and when the difference graph exists in the fused image, judging that the difference graph is a partial discharge graph, and using the position information corresponding to the fused image as the position information of the target electrical equipment with partial discharge. The method solves the problems that the existing method for detecting the partial discharge position of the electrical equipment is low in accuracy, low in detection efficiency and the like.
Description
Technical Field
The application relates to a detection method of electrical equipment, in particular to a detection method of a partial discharge position of the electrical equipment.
Background
The electrical equipment is the basis for ensuring the safe and stable operation of the power system. A discharge phenomenon caused by a partial breakage of an insulating structure of an electrical device is called partial discharge. The partial discharge can cause the electrical performance and the mechanical performance of the insulating medium to be reduced, and the long-term partial discharge can cause the damage of electrical equipment and even cause the large-area power failure accident of a power grid. Only the position where the partial discharge occurs is detected in time, the damage of the insulation structure of the electrical equipment can be repaired in time, so that the power grid accident is avoided. Therefore, it is important to be able to detect the position where the partial discharge occurs in time.
Currently, a method for detecting a partial discharge position of an electrical device is to determine a position where partial discharge occurs by using an infrared imager and a temperature change. However, the temperature of the position where the partial discharge occurs is affected by the temperature of the charged device, and thus, the final determination is greatly disturbed, which eventually leads to a decrease in the accuracy of the determination and a low detection efficiency.
Therefore, how to provide an accurate and efficient method for detecting a partial discharge position has become an urgent technical problem to be solved by those skilled in the art.
Disclosure of Invention
The application provides a method for detecting a partial discharge position of electrical equipment, which aims to solve the problems of low accuracy, low detection efficiency and the like of the existing method for detecting the partial discharge position of the electrical equipment.
A method for detecting a partial discharge position of an electrical device includes:
collecting electromagnetic wave signals of target electrical equipment by using an electromagnetic wave imager to obtain an electromagnetic wave image;
marking the electromagnetic wave image with position information by using the electromagnetic wave imager;
shooting the target electrical equipment by using a visible light detector to obtain a visible light image;
marking the visible light image with position information by using the visible light detector;
respectively processing the electromagnetic wave image and the visible light image by using an image processing device to respectively obtain an electromagnetic wave HIS color component value and a visible light HIS color component value in an HIS color space;
fusing the electromagnetic wave HIS color component value and the visible light HIS color component value marked with the same position information by using the image processing device to obtain a fused color component value;
obtaining a fused image according to the fused color component values by using the image processing device;
comparing the visible light image with the fused image by using the image processing device, and judging whether a difference image exists in the fused image;
and when the difference graph exists in the fused image, judging that the difference graph is a partial discharge graph, wherein the position information corresponding to the fused image is the position information of the target electrical equipment with partial discharge.
According to the technical scheme, the method for detecting the partial discharge position of the electrical equipment comprises the following steps: collecting electromagnetic wave signals of target electrical equipment by using an electromagnetic wave imager to obtain an electromagnetic wave image; marking the electromagnetic wave image with position information by using the electromagnetic wave imager; shooting the target electrical equipment by using a visible light detector to obtain a visible light image; marking the visible light image with position information by using the visible light detector; respectively processing the electromagnetic wave image and the visible light image by using an image processing device to respectively obtain an electromagnetic wave HIS color component value and a visible light HIS color component value in an HIS color space; fusing the electromagnetic wave HIS color component value and the visible light HIS color component value marked with the same position information by using the image processing device to obtain a fused color component value; obtaining a fused image according to the fused color component values by using the image processing device; comparing the visible light image with the fused image by using the image processing device, and judging whether a difference image exists in the fused image; and when the difference graph exists in the fused image, judging that the difference graph is a partial discharge graph, wherein the position information corresponding to the fused image is the position information of the target electrical equipment with partial discharge. By the method, the electromagnetic wave signals collected by the electromagnetic wave imager may have the shape and intensity information of the target position discharge, and the electromagnetic wave signals are converted into electromagnetic wave images; the image shot by the visible light detector has position background information, the electromagnetic wave image with the same position information is fused with the visible light image, whether the fused image has a discharge pattern is judged by judging whether a difference pattern which does not exist in the visible light image exists in the fused image, so that the position information of partial discharge is obtained, and the accuracy and the efficiency of partial discharge detection are improved.
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In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for detecting a partial discharge position of an electrical device according to the present disclosure;
fig. 2 is an exemplary schematic diagram of an electromagnetic wave image, a visible light image, and a fused image.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 1 is a flowchart of a method for detecting a partial discharge position of an electrical device according to the present application. As shown in fig. 1, the present application provides a method for detecting a partial discharge position of an electrical device, including:
s1: and collecting electromagnetic wave signals of the target electrical equipment by using an electromagnetic wave imager to obtain an electromagnetic wave image.
S1, collecting electromagnetic wave signals from the target electrical device by using an electromagnetic wave imager, and obtaining an electromagnetic wave image, including:
s11: and collecting electromagnetic wave signals of the target electrical equipment by using an electromagnetic wave imager to obtain an electromagnetic wave signal set.
S11, collecting electromagnetic wave signals from the target electrical device by using an electromagnetic wave imager, and obtaining an electromagnetic wave signal set, including:
s111: collecting electromagnetic wave signals of target electrical equipment by using an electromagnetic wave imager to obtain an original electromagnetic wave signal set;
s112: and amplifying all original electromagnetic wave signals in the original electromagnetic wave signal set by using a signal amplification module of the electromagnetic wave imager to obtain an electromagnetic wave amplified signal set.
S112, using a signal amplification module of the electromagnetic wave imager to amplify all the original electromagnetic wave signals in the original electromagnetic wave signal set, so as to obtain an electromagnetic wave amplified signal set, including:
and amplifying all original electromagnetic wave signals in the original electromagnetic wave signal set by using a signal amplification module of the electromagnetic wave imager, and amplifying the original electromagnetic wave signals by 2-10000 times to obtain an electromagnetic wave amplified signal set.
Generally, the electromagnetic wave signals collected by the electromagnetic wave imager are weak and need to be amplified for analysis, so that the collected original electromagnetic wave signals need to be amplified. The signal amplifying module may adopt an AD620 amplifier, and the application is not particularly limited.
S113: and filtering the electromagnetic wave amplification signal set by using a filtering module of the electromagnetic wave imager to obtain an electromagnetic wave signal set.
The amplified electromagnetic wave signal has a lot of noises, and in order to remove useless interference signals, the amplified electromagnetic wave signal needs to be filtered, and the noises are filtered, so that the authenticity of the electromagnetic wave signal is ensured. The filtering module may use a band-pass filter, and in general, the frequency of the electromagnetic wave amplification signal is between 0.3 and 3GHZ, so that the low-frequency cutoff frequency of the band-pass filter may be 0.2GHZ, and the high-frequency cutoff frequency may be 3.1GHZ, which is not limited in this application.
S12: and (3) utilizing a signal processing module of the electromagnetic wave imager to perform numerical normalization processing on all electromagnetic wave signals in the electromagnetic wave signal set, and normalizing all electromagnetic wave signals to be within a range of 0-255 to obtain an electromagnetic wave normalized numerical set.
S13: and comparing all the normalized values in the electromagnetic wave normalized value set with a gray threshold value by using a signal processing module, recording the normalized values which are greater than the gray threshold value as 255, and recording the normalized values which are less than the gray threshold value as 0 to obtain a binary gray value set.
S14: and (3) using an imaging module of the electromagnetic wave imager to take 0 and 255 in the binary gray value set as gray values, and generating an electromagnetic wave image according to the binary gray value set.
Normalizing all electromagnetic wave signals to be within a 0-255 interval so as to convert the electromagnetic wave signals into pixel gray values capable of generating images; the setting of the gray threshold is to divide the normalized electromagnetic wave signal into 0 and 255 grays again, that is, the gray values of the black and white grays, and the gray threshold may be set to 128, which may be determined as the case may be, and the present application is not limited specifically. And converting the binary gray value set into an image, namely an electromagnetic wave image. It is understood that the electromagnetic wave image is a black and white image.
S2: and marking the electromagnetic wave image with position information by using an electromagnetic wave imager.
The target electrical equipment can be understood as electrical equipment to be detected, electromagnetic wave signals are collected at different positions of the electrical equipment to be detected, electromagnetic wave images of the different positions are obtained, and the position information is used as mark information of the electromagnetic wave images.
S3: and shooting the target electrical equipment by using the visible light detector to obtain a visible light image.
S4: and marking the position information of the visible light image by using a visible light detector.
As with the electromagnetic wave image, the position information is used as the mark information of the visible light image, and the mark information may exist in the form of a picture name, which is not particularly limited in the present application.
S5: the electromagnetic wave image and the visible light image are respectively processed by an image processing device, and an electromagnetic wave HIS color component value and a visible light HIS color component value in an HIS color space are respectively obtained.
S5, processing the electromagnetic wave image and the visible light image respectively by the image processing apparatus to obtain an electromagnetic wave HIS color component value and a visible light HIS color component value in the HIS color space, respectively, including:
s51: the electromagnetic wave image is processed by an image processing device to obtain electromagnetic wave RGB color component values of the electromagnetic wave image in an RGB color space.
S52: and performing HIS transformation on the RGB color component values of the electromagnetic waves by using an image processing device to obtain the HIS color component values of the electromagnetic waves of the electromagnetic wave image in an HIS color space.
S52, performing an HIS transform on the RGB color component values of the electromagnetic wave using the image processing apparatus to obtain the HIS color component values of the electromagnetic wave image in the HIS color space, including:
the electromagnetic wave RGB color component values comprise an electromagnetic wave image R color component value, an electromagnetic wave image G color component value and an electromagnetic wave image B color component value, and the electromagnetic wave HIS color component values comprise an electromagnetic wave image brightness component value, an electromagnetic wave image first transition vector and an electromagnetic wave image second transition vector.
S521: using an image processing device, based on the color component value R of the electromagnetic wave image R1Electromagnetic wave image G color component value G1And electromagnetic wave image B color component value B1Calculating the brightness component value I of the electromagnetic wave image according to the following formula1First transition vector V of electromagnetic wave image1And a second transition vector P of the electromagnetic wave image1：
Wherein, I1Is a value of a brightness component, V, of an electromagnetic wave image1Is a first transition vector, P, of the electromagnetic wave image1As a second transition vector, R, of the electromagnetic wave image1Is the color component value, G, of the electromagnetic wave image R1Is the color component value of the electromagnetic wave image G, B1Is the electromagnetic wave image B color component value.
Electromagnetic wave image R color component value R1Electromagnetic wave image G color component value G1And electromagnetic wave image B color component value B1Can be obtained directly as a known quantity through image processing by an image processing apparatus.
S522: according to electricityFirst transition vector V of magnetic wave image1And a second transition vector P of the electromagnetic wave image1Calculating the saturation value S of the electromagnetic wave image according to the following formula1And the chromaticity component value H of the electromagnetic wave image1：
Wherein S is1Is a saturation component value of the electromagnetic wave image H1For the value of the chrominance component, V, of the electromagnetic wave image1Is a first transition vector, P, of the electromagnetic wave image1And a second transition vector of the electromagnetic wave image.
The electromagnetic wave image saturation component value S obtained in step S5221And the chromaticity component value H of the electromagnetic wave image1Is also part of the color component value of the electromagnetic wave HIS, and is formed by a first transition vector V of the electromagnetic wave image1And a second transition vector P of the electromagnetic wave image1And calculating to obtain the product.
S53: and processing the visible light image by using an image processing device to obtain visible light RGB color component values of the visible light image in the RGB color space.
S54: and performing HIS transformation on the visible light RGB color component values by using an image processing device to obtain visible light HIS color component values of the visible light image in an HIS color space.
S54, performing an HIS transform on the RGB color component values of the visible light using the image processing apparatus to obtain the HIS color component values of the visible light image in the HIS color space, including:
the visible light RGB color component values comprise a visible light image R color component value, a visible light image G color component value and a visible light image B color component value, and the visible light HIS color component values comprise a visible light image brightness component value, a visible light image saturation component value and a visible light image chroma component value.
Using an image processing apparatus, based on a visible light image R color component value R2Visible light image G color component value G2And a visible light image B color component value B2Calculating the value of the brightness component I of the visible light image according to the following formula2First transition vector V of visible light image2And a second transition vector P of the visible image2：
Wherein, I2Is a value of a luminance component of a visible image, V2For the first transition vector, P, of the visible image2For a second transition vector of the visible image, R2Is the color component value, G, of the electromagnetic wave image R2Is the color component value of the electromagnetic wave image G, B2Is the electromagnetic wave image B color component value.
Visible light image R color component value R2Visible light image G color component value G2And a visible light image B color component value B2The known quantity can be obtained directly by image processing by an image processing apparatus.
Similarly, the first transition vector V can be based on the visible light image2And a second transition vector P of the visible image2The saturation value S of the visible light image is calculated according to the following formula2And a visible image chroma component value H2：
Wherein S is2Is a value of the saturation component of the visible light image, H2For the value of the chrominance component of the visible image, V2For the first transition vector, P, of the visible image2A second transition vector for the visible light image.
The obtained visible light image saturationComponent value S2And a visible image chroma component value H2Is also part of the value of the visible HIS color component, is derived from the visible image first transition vector V2And a second transition vector P of the visible image2And calculating to obtain the product.
S6: and fusing the electromagnetic wave HIS color component value marked with the same position information and the visible light HIS color component value by using an image processing device to obtain a fused color component value.
Both the visible light image and the electromagnetic wave image are marked with position information, and it is understood that corresponding HIS color component values obtained according to the visible light image and the electromagnetic wave image are also marked with the same position information.
S6, fusing the electromagnetic wave HIS color component values and the visible light HIS color component values marked with the same position information by using the image processing apparatus, to obtain fused color component values, including:
s61: using an image processing device, the brightness component value I of the electromagnetic wave image marked with the same position information is processed according to the following formula1And a value of a visible image luminance component I2And (3) carrying out fusion to obtain a fusion brightness component value I:
I＝w1*I1+w2*I2,
wherein, I1As the value of the brightness component of the electromagnetic wave image, I2Is a value of a luminance component of a visible image, w1For the value of the brightness component I of the electromagnetic wave image1Set specific gravity of, w2For the value of the brightness component I of the visible image2The set specific gravity of (2).
w1And w2Can be set according to actual conditions, for example, when the value I of the brightness component of the visible light image is set2Greater than the brightness component value I of the electromagnetic wave image1When w1Can be greater than w2As long as w is satisfied1+w2The number of the carbon atoms may be 1, and the present application is not particularly limited. Electromagnetic wave image brightness component value I1And a value of a visible image luminance component I2The fusion of (1) can be understood as taking the weighted luminance component values of the two.
S62: according to the fusion brightness component value I and the first transition vector V of the visible light image2And a second transition vector P of the visible image2Calculating the fusion R color component value R according to the following formula0Fusing G color component values G0And fusing B color component values B0：
Wherein R is0To fuse R color component values, G0To fuse G color component values, B0For fusing B color component values, I for fusing luminance component values, V2For the first transition vector, P, of the visible image2A second transition vector for the visible light image.
According to the fusion brightness component value I and the first transition vector V of the visible light image2And a second transition vector P of the visible image2Calculating to obtain a fused R color component value R0Fusing G color component values G0And fusing B color component values B0Can be understood as the inverse HIS transform.
S7: and obtaining a fused image according to the fused color component values by using an image processing device.
S7, obtaining a fused image according to the fused color component values using the image processing apparatus, comprising:
using an image processing apparatus, based on the fused R color component value R0Fusing G color component values G0And fusing B color component values B0And generating a fused image.
S8: and comparing the visible light image with the fused image by using an image processing device, and judging whether a difference image exists in the fused image.
S8, comparing the visible light image with the fused image by the image processing apparatus, and determining whether there is a difference pattern in the fused image, including:
and comparing all the graphs in the visible light image with all the graphs in the fusion image one by using an image identification module of the image processing device, and judging whether a difference graph exists in the fusion image.
S9: and when the difference graph exists in the fused image, judging that the difference graph is a partial discharge graph, and using the position information corresponding to the fused image as the position information of the target electrical equipment with partial discharge.
If the position to be detected has partial discharge, the electromagnetic wave imager can collect the electromagnetic wave signal of the partial discharge and convert the electromagnetic wave signal of the partial discharge into an electromagnetic wave image, and the electromagnetic wave signal of the partial discharge is reflected in the electromagnetic wave image in a form of a graph and is also reflected in the same shape in the fused image, but can not be reflected in the visible light image. And comparing each graph in the visible light image with all the graphs in the fused image one by one, wherein when the graphs which are not in the visible light image exist in the fused image, the graphs are different graphs. Compared with the visible light image, the fused image has a difference graph, and the position information corresponding to the fused image is the position information of the target electrical equipment with partial discharge. On the contrary, when the difference pattern does not exist in the fused image, the partial discharge does not occur at the position corresponding to the target electrical device corresponding to the position information.
Fig. 2 is an exemplary schematic diagram of an electromagnetic wave image, a visible light image, and a fused image. As shown in fig. 2, the electromagnetic wave image 2 marked with the same positional information is fused with the visible light image 1 to generate a fused image 3. The same position information represents that the position of the electromagnetic wave image 2 for collecting the electromagnetic wave signal and the shooting position of the visible light image 1 are at the same position on the target electrical equipment, when the electromagnetic wave image 2 at the same position captures the discharge shape 21 of partial discharge, the difference graph 31 appears in the fused image 3 through the graph comparison of the visible light image 1 and the fused image 3, and the shape of the difference graph 31 is the same as that of the discharge shape 21. Therefore, the position information corresponding to the fusion image 3 is determined as the position information of the target electrical device at which the partial discharge has occurred.
According to the method for detecting the partial discharge position of the electrical equipment, the electromagnetic wave signals collected by the electromagnetic wave imager are converted into electromagnetic wave images, wherein the electromagnetic wave signals may have the discharge shape and intensity information of a target position; the image shot by the visible light detector has position background information, the electromagnetic wave image with the same position information is fused with the visible light image, and whether a discharge pattern exists in the fused image is judged by judging whether a difference pattern which does not exist in the visible light image exists in the fused image, so that the position information of partial discharge is obtained. The characteristics of strong anti-interference capability of electromagnetic waves are utilized, the definition of the fused image can be improved, information such as color and outline of the visible light image can be retained, and the accuracy and efficiency of partial discharge detection are improved.
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The same and similar parts in the various embodiments in this specification may be referred to each other. In particular, for the embodiments, since they are substantially similar to the method embodiments, the description is simple, and the relevant points can be referred to the description in the method embodiments.
Claims (10)
1. A method for detecting a partial discharge position of an electrical device, comprising:
collecting electromagnetic wave signals of target electrical equipment by using an electromagnetic wave imager to obtain an electromagnetic wave image;
marking the electromagnetic wave image with position information by using the electromagnetic wave imager;
shooting the target electrical equipment by using a visible light detector to obtain a visible light image;
marking the visible light image with position information by using the visible light detector;
respectively processing the electromagnetic wave image and the visible light image by using an image processing device to respectively obtain an electromagnetic wave HIS color component value and a visible light HIS color component value in an HIS color space;
fusing the electromagnetic wave HIS color component value and the visible light HIS color component value marked with the same position information by using the image processing device to obtain a fused color component value;
obtaining a fused image according to the fused color component values by using the image processing device;
comparing the visible light image with the fused image by using the image processing device, and judging whether a difference image exists in the fused image;
and when the difference graph exists in the fused image, judging that the difference graph is a partial discharge graph, wherein the position information corresponding to the fused image is the position information of the target electrical equipment with partial discharge.
2. The method for detecting a partial discharge position of an electrical device according to claim 1, wherein the processing the electromagnetic wave image and the visible light image by the image processing apparatus to obtain the electromagnetic wave HIS color component value and the visible light HIS color component value in the HIS color space comprises:
processing the electromagnetic wave image by using an image processing device to obtain electromagnetic wave RGB color component values of the electromagnetic wave image in an RGB color space;
performing HIS transformation on the RGB color component values of the electromagnetic waves by using the image processing device to obtain the HIS color component values of the electromagnetic waves of the electromagnetic wave image in an HIS color space;
processing the visible light image by using the image processing device to obtain visible light RGB color component values of the visible light image in the RGB color space;
and performing HIS transformation on the visible light RGB color component values by using the image processing device to obtain visible light HIS color component values of the visible light image in the HIS color space.
3. The method for detecting the partial discharge position of the electrical equipment according to claim 2, wherein the obtaining of the electromagnetic wave HIS color component value of the electromagnetic wave image in the HIS color space by performing HIS transform on the electromagnetic wave RGB color component values by using the image processing apparatus comprises:
the electromagnetic wave RGB color component values comprise an electromagnetic wave image R color component value, an electromagnetic wave image G color component value and an electromagnetic wave image B color component value, and the electromagnetic wave HIS color component values comprise an electromagnetic wave image brightness component value, an electromagnetic wave image first transition vector and an electromagnetic wave image second transition vector;
using the image processing device to process the electromagnetic wave image R according to the color component value R1The electromagnetic wave image G color component value G1And said electromagnetic wave image B color component value B1Calculating the brightness component value I of the electromagnetic wave image according to the following formula1The first transition vector V of the electromagnetic wave image1And a second transition vector P of the electromagnetic wave image1：
Wherein, I1Is the value of the brightness component of the electromagnetic wave image, V1For a first transition vector, P, of the electromagnetic wave image1For a second transition vector, R, of the electromagnetic wave image1For said electromagnetic wave image R color component value, G1Is the value of the color component of the electromagnetic wave image G, B1And B, obtaining the color component value of the electromagnetic wave image B.
4. The method for detecting the partial discharge position of the electrical equipment according to claim 3, wherein the obtaining of the color component value of the visible light HIS in the HIS color space by performing the HIS transformation on the color component values of the visible light RGB using the image processing apparatus comprises:
the visible light RGB color component values comprise a visible light image R color component value, a visible light image G color component value and a visible light image B color component value, and the visible light HIS color component values comprise a visible light image brightness component value, a visible light image first transition vector and a visible light image second transition vector;
utilizing the image processing device to process the color component value R according to the visible light image R2The color component value G of the visible light image G2And said visible light image B color component value B2Calculating the brightness component value I of the visible light image according to the following formula2The first transition vector V of the visible light image2And a second transition vector P of the visible light image2：
Wherein, I2Is the value of the luminance component of said visible image, V2For the first transition vector, P, of the visible light image2For the second transition vector, R, of the visible light image2For said electromagnetic wave image R color component value, G2Is the value of the color component of the electromagnetic wave image G, B2And B, obtaining the color component value of the electromagnetic wave image B.
5. The method for detecting a partial discharge position of an electrical device according to claim 4, wherein said fusing the electromagnetic wave HIS color component value and the visible light HIS color component value, which are marked with the same position information, by using the image processing apparatus to obtain a fused color component value comprises:
using the image processing apparatus, the brightness component value I of the electromagnetic wave image marked with the same position information is processed according to the following formula1And said visible light image luminance component value I2And (3) carrying out fusion to obtain a fusion brightness component value I:
I＝w1*I1+w2*I2,
wherein, I1Is a value of a brightness component of said electromagnetic wave image, I2Is the value of the luminance component of said visible image, w1For the value I of brightness component of the electromagnetic wave image1Set specific gravity of, w2For the value of the brightness component I of the visible light image2The set specific gravity of (2);
according to the fusion brightness component value I and the first transition vector V of the visible light image2And a second transition vector P of the visible light image2Calculating the fusion R color component value R according to the following formula0Fusing G color component values G0And fusing B color component values B0：
Wherein R is0For said fused R color component values, G0For said fused G color component values, B0Is said fused B color component value, I is said fused luma component value, V2For the first transition vector, P, of the visible light image2A second transition vector for the visible light image.
6. The method for detecting a partial discharge position of an electrical device according to claim 5, wherein obtaining a fused image from fused color component values by the image processing apparatus comprises:
using said image processing device, according to said fused R color component value R0Said fused G color component value G0And said fused B color component value B0And generating a fused image.
7. The method for detecting the partial discharge position of the electrical equipment according to claim 1, wherein the collecting of the electromagnetic wave signal from the target electrical equipment by the electromagnetic wave imager to obtain the electromagnetic wave image comprises:
collecting electromagnetic wave signals of target electrical equipment by using an electromagnetic wave imager to obtain an electromagnetic wave signal set;
performing numerical normalization processing on all electromagnetic wave signals in the electromagnetic wave signal set by using a signal processing module of the electromagnetic wave imager, and normalizing all the electromagnetic wave signals to be within a range of 0-255 to obtain an electromagnetic wave normalization numerical set;
comparing all normalization values in the electromagnetic wave normalization value set with a gray threshold value by using the signal processing module, recording the normalization value larger than the gray threshold value as 255, and recording the normalization value smaller than the gray threshold value as 0 to obtain a binarization gray value set;
and using an imaging module of the electromagnetic wave imager to take 0 and 255 in the binary gray value set as gray values, and generating an electromagnetic wave image according to the binary gray value set.
8. The method for detecting the partial discharge position of the electrical device according to claim 7, wherein the collecting the electromagnetic wave signal from the target electrical device by using the electromagnetic wave imager to obtain the electromagnetic wave signal set comprises:
collecting electromagnetic wave signals of target electrical equipment by using the electromagnetic wave imager to obtain an original electromagnetic wave signal set;
amplifying all original electromagnetic wave signals in the original electromagnetic wave signal set by using a signal amplification module of the electromagnetic wave imager to obtain an electromagnetic wave amplified signal set;
and filtering the electromagnetic wave amplification signal set by using a filtering module of the electromagnetic wave imager to obtain an electromagnetic wave signal set.
9. The method for detecting the partial discharge position of the electrical device according to claim 8, wherein the step of amplifying all the original electromagnetic wave signals in the original electromagnetic wave signal set by using the signal amplification module of the electromagnetic wave imager to obtain the electromagnetic wave amplified signal set comprises:
and amplifying all original electromagnetic wave signals in the original electromagnetic wave signal set by using a signal amplification module of the electromagnetic wave imager, and amplifying the original electromagnetic wave signals by 2-10000 times to obtain an electromagnetic wave amplification signal set.
10. The method for detecting the partial discharge position of the electrical equipment according to claim 1, wherein the comparing the visible light image with the fused image by using the image processing device to determine whether a difference pattern exists in the fused image comprises:
and comparing all the graphs in the visible light image with all the graphs in the fusion image one by utilizing an image identification module of the image processing device, and judging whether a difference graph exists in the fusion image.
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