Equipment fault detection system and method

Abstract

The invention discloses an equipment fault detection system and method, which is applied to oil-filled equipment of a transformer substation and comprises a light source module, an acquisition module, an analysis module and a processing module, the light source module is used for emitting an ultraviolet laser signal with a specific wavelength to the surface of to-be-detected equipment; when the to-be-tested equipment has an oil leakage fault, an oil film on the surface of the to-be-tested equipment receives an ultraviolet laser signal and excites a fluorescence signal, and the analysis module is used for generating an oil leakage position signal based on the fluorescence signal; the acquisition module is connected with the analysis module and is used for acquiring a first image and a second image of the surface of the to-be-detected equipment; the processing module is connected with the analysis module and is used for generating a third image according to the first image and the position signal; the processing module generates a fourth image based on the second image and the third image through a fusion algorithm and feeds back the fourth image to the user side. The detection system provided by the invention can realize rapid detection of the oil leakage fault of the equipment, and is convenient for workers to rapidly position the fault.

Description

Technical Field

[0001] The invention relates to the technical field of oil leakage detection, and in particular to a detection system and method for equipment failure. Background Art

[0002] Oil-filled equipment is commonly used in substations, including oil-filled transformers, oil-filled mutual inductors, oil-filled capacitors, etc. Insulating oil is often used to fill oil-filled equipment for its insulation and heat dissipation functions. Due to heat generation, poor sealing, liquid expansion, etc. during use, oil leakage accidents are often discovered.

[0003] At present, there are the following means to monitor oil leakage in equipment: conventional methods are manual inspections with naked eyes or drone inspections with visible light cameras; at present, probes based on ultraviolet fluorescence technology are used for identification. However, these methods have the following problems: first, the identification efficiency is low; second, the observation method is limited, and it can only detect whether oil leakage occurs, but it is difficult to directly find the corresponding oil leakage location and equipment leakage point, and it is difficult to observe the traces of oil leakage. Summary of the invention

[0004] The present invention provides a detection system and method for equipment failure. An ultraviolet laser signal is emitted to oil-filled equipment through a light source module. When an oil leakage failure occurs in the oil-filled equipment, the oil film excites a fluorescent signal due to the ultraviolet laser signal. The specific location information of the oil leakage in the oil-filled equipment is determined based on the fluorescent signal. The equipment failure detection system provided by the present invention can realize rapid detection of oil-filled equipment, which helps operation and maintenance personnel to quickly analyze the traces, position, and leakage points of the oil leakage through the position of the insulating oil on the visible light image.

[0005] According to a first aspect of the present invention, there is provided a device failure detection system, which is applied to oil-filled equipment in a substation, and comprises: a light source module, an acquisition module, an analysis module and a processing module;

[0006] The light source module is connected to the analysis module, and the light source module is used to emit an ultraviolet laser signal of a specific wavelength to the surface of the device to be tested;

[0007] When the device under test has an oil leakage fault, the oil film on the surface of the device under test receives the ultraviolet laser signal and excites a fluorescence signal, and the analysis module is used to generate an oil leakage position signal based on the fluorescence signal;

[0008] The acquisition module is connected to the analysis module, and the acquisition module is used to acquire a first image and a second image of the surface of the device under test;

[0009] The processing module is connected to the analysis module, and the processing module is used to generate a third image according to the first image and the position signal;

[0010] The processing module generates a fourth image based on the second image and the third image through a fusion algorithm and feeds the fourth image back to the user end.

[0011] Optionally, a transceiver module is also included;

[0012] The transceiver module is connected to the analysis module, and is used to receive the fluorescence signal and transmit the fluorescence signal to the analysis module.

[0013] Optionally, an alarm module is also included;

[0014] The alarm module is connected to the processing module, and sends out an alarm message when the equipment under test has an oil leakage fault; wherein the alarm message includes at least one of the following: a voice reminder, a buzzer reminder, and a light reminder.

[0015] Optionally, a display module is also included;

[0016] The display module is connected to the processing module, and is used to display the first image, the second image, the third image, and the fourth image.

[0017] Optionally, the light source module includes an ultraviolet semiconductor laser.

[0018] Optionally, the acquisition module includes a first acquisition unit and a second acquisition unit;

[0019] The first acquisition unit is used to acquire the first image, and the second acquisition unit is used to acquire the second image.

[0020] Optionally, the first acquisition unit includes an ultraviolet light camera; the second acquisition unit includes a visible light camera.

[0021] Optionally, the display module includes a display screen.

[0022] According to a second aspect of the present invention, there is provided a method for detecting a device failure, which is applicable to any device failure detection system described in the first aspect of the present invention, comprising:

[0023] Acquire a first image and a second image of the device under test;

[0024] When the device under test has an oil leakage fault, the oil film on the surface of the device under test receives the ultraviolet laser signal to excite a fluorescence signal, and a position signal is generated according to the fluorescence signal;

[0025] A third image is generated according to the first image and the position signal, and a fourth image is generated through a fusion algorithm based on the second image and the third image and fed back to the user end.

[0026] Optionally, after a fourth image is generated based on the second image and the third image by a fusion algorithm and fed back to the user end, the method further includes:

[0027] Sending an alarm message to the user terminal, wherein the alarm message includes at least one of the following: a voice reminder, a buzzer reminder, and a light reminder.

[0028] The invention discloses a detection system for equipment failure, which is applied to oil-filled equipment in a substation, and comprises: a light source module, an acquisition module, an analysis module and a processing module; the light source module is connected with the analysis module, and the light source module is used to emit an ultraviolet laser signal of a specific wavelength to the surface of the equipment to be tested; when an oil leakage failure occurs in the equipment to be tested, the oil film on the surface of the equipment to be tested receives the ultraviolet laser signal to excite a fluorescence signal, and the analysis module is used to generate an oil leakage position signal based on the fluorescence signal; the acquisition module is connected with the analysis module, and the acquisition module is used to acquire a first image and a second image of the surface of the equipment to be tested; the processing module is connected with the analysis module, and the processing module is used to generate a third image according to the first image and the position signal; the processing module generates a fourth image based on the second image and the third image through a fusion algorithm and feeds back the fourth image to a user end. The present invention provides a detection system and method for equipment failure, which emits ultraviolet laser signals to oil-filled equipment through a light source module. When an oil leakage failure occurs in the oil-filled equipment, a fluorescent signal is fed back, and the specific location information of the oil leakage in the oil-filled equipment is determined based on the fluorescent signal. The equipment failure detection system provided by the present invention can realize rapid detection of oil-filled equipment, which helps operation and maintenance personnel to quickly analyze the traces, positions, and leakage points of oil leakage through the position of insulating oil on a visible light image.

[0029] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 It is a structural block diagram of a device failure detection system provided by an embodiment of the present invention;

[0032] Figure 2 is a structural block diagram of another device failure detection system provided by an embodiment of the present invention;

[0033] Figure 3 is a structural block diagram of another device failure detection system provided by an embodiment of the present invention;

[0034] Figure 4 is a structural block diagram of another device failure detection system provided by an embodiment of the present invention;

[0035] Figure 5 is a structural block diagram of another device failure detection system provided by an embodiment of the present invention;

[0036] Figure 6 is a flow chart of a method for detecting equipment failure provided by an embodiment of the present invention;

[0037] Figure 7 It is a flow chart of another device failure detection method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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 should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0041] Figure 1 is a structural block diagram of a device failure detection system provided by an embodiment of the present invention, refer to Figure 1The device failure detection system provided by the embodiment of the present invention is applied to oil-filled equipment in a substation, and includes: a light source module 1, an acquisition module 2, an analysis module 3 and a processing module 4; the light source module 1 is connected to the analysis module 3, and the light source module 1 is used to emit an ultraviolet laser signal S of a specific wavelength to the surface of the device under test 5; when an oil leakage failure occurs in the device under test 5, the device under test 5 receives the ultraviolet laser signal S to excite a fluorescence signal S', and the analysis module 3 is used to generate an oil leakage position signal based on the fluorescence signal S'; the acquisition module 2 is connected to the analysis module 3, and the acquisition module 2 is used to acquire a first image and a second image of the surface of the device under test 5; the processing module 4 is connected to the analysis module 3, and the processing module 4 is used to generate a third image according to the first image and the position signal; the processing module 4 generates a fourth image based on the second image and the third image through a fusion algorithm and feeds it back to the user end.

[0042] Among them, oil-filled equipment is widely used in power systems, such as oil-filled transformers, oil-filled reactors, oil-filled mutual inductors, etc. All or part of its components are immersed in oil, so that the equipment cannot ignite explosive mixtures above the oil surface or outside the shell.

[0043] Specifically, refer to Figure 1 , the light source module 1 is connected to the analysis module 3, and the light source module 1 is used to emit an ultraviolet laser signal S of a specific wavelength to the surface of the device to be tested 5. When the device to be tested 5 has an oil leakage fault, it can be understood that the oil leakage fault here refers to the oil leakage of the oil-filled equipment next to or on the surface of the oil-filled equipment due to heating, poor sealing, liquid expansion, etc. The ultraviolet laser signal S is converted into a fluorescent signal S'. The principle is to analyze whether there is an oil film (i.e., oil leakage fault) on the surface of the device to be tested 5 based on the fluorescence emitted by petroleum and its aromatic compounds and conjugated double bond compounds after absorbing ultraviolet light. The analysis module 3 is used to analyze the fluorescence size according to the fluorescence signal S' and convert it into a position signal of the oil leakage.

[0044] Figure 2 is a structural block diagram of another device failure detection system provided by an embodiment of the present invention, referring to Figure 2 Optionally, the acquisition module 2 includes a first acquisition unit 21 and a second acquisition unit 22; the first acquisition unit 21 is used to acquire the first image, and the second acquisition unit 22 is used to acquire the second image.

[0045] Optionally, the first acquisition unit 21 includes an ultraviolet light camera; the second acquisition unit 22 includes a visible light camera.

[0046] The acquisition module 2 is connected to the analysis module 3, and the acquisition module 2 is used to capture the first image and the second image of the surface of the device under test 5; since the first acquisition unit 21 is an ultraviolet light camera and the second acquisition unit 22 is a visible light camera, it can be understood that the first image captured is an ultraviolet light image and the second image captured is a visible light image. The processing module 4 is connected to the analysis module 3. When an oil leakage failure occurs in the device under test 5, the analysis module 3 generates a position signal of the leaking oil according to the fluorescent signal S', and the processing module 4 generates a third image (i.e., an ultraviolet light image with an oil leakage position mark) by fusing the position signal and the first image (i.e., the ultraviolet light image). Since ultraviolet light is invisible light and cannot be directly observed by the human eye, the processing module 4 generates a fourth image (a visible light image with an oil leakage position mark) based on the second image (i.e., the visible light image) and the third image (i.e., the ultraviolet light image with an oil leakage position mark) and feeds it back to the user end.

[0047] The above-mentioned fusion image algorithm steps are as follows:

[0048] 1. Use the calibrated visible light camera and ultraviolet light camera to capture the ultraviolet light image and visible light image of the device under test.

[0049] 2. Automatically collect registration control points in the ultraviolet image template to ensure that the control points can be positioned in the ultraviolet image template.

[0050] 3. Based on each control point, the epipolar calculation formula is used to obtain the corresponding epipolar position in the visible light image, creating an analysis basis for the selection of configuration control points on the visible light image.

[0051] 4. Select reasonable configuration control points in the visible light image. These points are all located on the corresponding epipolar lines. Use the random sample consensus algorithm (RANSAC) according to the configuration control points to obtain the transformation matrix H from the ultraviolet image to the visible light image.

[0052] 5. Based on the transformation matrix H, the ultraviolet image is transformed into a visible light image to achieve registration of the ultraviolet window image to the visible light window image.

[0053] The equipment fault detection system provided by the embodiment of the present invention can realize rapid detection of oil-filled equipment by fusing the oil leakage position signal and the ultraviolet light image, and then fusing the fused image with the visible light image to finally generate a visible light image marked with a position signal and feed it back to the user end. It can help operation and maintenance personnel to quickly analyze the traces, position, and leakage points of oil leakage through the insulating oil position on the visible light image.

[0054] Figure 3is a structural block diagram of another device failure detection system provided by an embodiment of the present invention, referring to Figure 3 Optionally, it also includes a transceiver module 6; the transceiver module 6 is connected to the analysis module 3, and the transceiver module 6 is used to receive the fluorescent signal S' and transmit the fluorescent signal S' to the analysis module 3.

[0055] Specifically, it also includes a transceiver module 6 , which is connected to the analysis module 3 and is used to receive the fluorescent signal S′ stimulated by the device under test 5 and transmit the fluorescent signal S′ to the analysis module 3 .

[0056] Figure 4 is a structural block diagram of another device failure detection system provided by an embodiment of the present invention, referring to Figure 4 Optionally, it also includes an alarm module 7; the alarm module 7 is connected to the processing module 4, and when the equipment under test 5 has an oil leakage failure, an alarm message is issued; wherein the alarm information includes at least one of the following: voice reminder, buzzer reminder and luminous reminder.

[0057] Specifically, it includes an alarm module 7, which is connected to the processing module 4. When the processing module 4 generates a fourth image (i.e., a visible light image with an oil leakage position mark) based on the second image (visible light image) and the third image (i.e., an ultraviolet light image with an oil leakage position mark), an alarm message is sent to the user end, wherein the alarm message includes: voice reminder, buzzer reminder and light reminder.

[0058] Figure 5 is a structural block diagram of another device failure detection system provided by an embodiment of the present invention, referring to Figure 5 Optionally, it also includes a display module 8; the display module 8 is connected to the processing module 4, and the display module 8 is used to display the first image, the second image, the third image and the fourth image.

[0059] Specifically, it also includes a display module 8, which is connected to the processing module 4, and the display module is used to display a first image (ultraviolet light image), a second image (visible light image), a third image (ultraviolet light image with oil leakage position mark) and a fourth image (visible light image with oil leakage position mark).

[0060] Optional, continue to refer to Figure 5 , the light source module 1 includes an ultraviolet semiconductor laser.

[0061] Specifically, the ultraviolet semiconductor laser generates an ultraviolet laser signal S with a peak wavelength of 365 nm and emits it to the surface of the device under test 5 .

[0062] Optional, continue to refer to Figure 5 , the display module 8 includes a display screen.

[0063] Figure 6 is a flow chart of a device failure detection method provided by an embodiment of the present invention, refer to Figure 6 According to the same inventive concept, an embodiment of the present invention provides a method for detecting a device failure, which is applicable to a device failure detection system described in any of the above-mentioned inventive embodiments, and includes:

[0064] S1. Acquire a first image and a second image of a device under test.

[0065] Specifically, the ultraviolet light image taken by the ultraviolet light camera and the visible light image taken by the visible light camera are acquired in real time.

[0066] S2. When the device under test has an oil leakage fault, the device under test receives the ultraviolet laser signal to excite a fluorescence signal, and generates a position signal according to the fluorescence signal.

[0067] Specifically, when the equipment to be tested has an oil leakage fault, the fluorescence emitted after the petroleum and the aromatic compounds and conjugated double bond compounds therein absorb ultraviolet light is used to analyze the existence of an oil film on the surface of the equipment to be tested 5 (i.e., an oil leakage fault occurs), the ultraviolet laser signal is received to excite the fluorescence signal, and the analysis module generates an oil leakage location signal based on the fluorescence signal.

[0068] S3. Generate a third image according to the first image and the position signal, generate a fourth image based on the second image and the third image through a fusion algorithm, and feed back the fourth image to the user end.

[0069] Specifically, the processing module generates a third image (i.e., an ultraviolet light image with a position signal) based on the first image (i.e., an ultraviolet light image) and the location signal of the leaking oil, and generates a fourth image (i.e., a visible light image with a position signal) based on the second image (i.e., the visible light image) and the third image and feeds it back to the user end.

[0070] Optional, Figure 7 is a flow chart of another device failure detection method provided by an embodiment of the present invention, refer to Figure 7 ,

[0071] S1. Acquire a first image and a second image of a device under test.

[0072] S2. When the device under test has an oil leakage fault, the device under test receives the ultraviolet laser signal to excite a fluorescence signal, and generates a position signal according to the fluorescence signal.

[0073] S3. Generate a third image according to the first image and the position signal, generate a fourth image based on the second image and the third image through a fusion algorithm, and feed back the fourth image to the user end.

[0074] S4. Send an alarm message to the user.

[0075] Specifically, when the processing module generates a fourth image (visible light image with position signal marks) based on the fusion of the second image (i.e., visible light image) and the third image (ultraviolet light image with position signal marks) and feeds it back to the user end, it also sends an alarm message to the user end to remind the staff, wherein the alarm information includes at least one of the following: voice reminder, beep reminder and light reminder.

[0076] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device failure detection system, characterized in that: Applied to oil-filled equipment in substations, including: light source module, acquisition module, analysis module and processing module; The light source module is connected to the analysis module, and the light source module is used to emit an ultraviolet laser signal of a specific wavelength to the surface of the device to be tested; When the device under test has an oil leakage fault, the oil film on the surface of the device under test receives the ultraviolet laser signal and excites a fluorescence signal, and the analysis module is used to generate an oil leakage position signal based on the fluorescence signal; The acquisition module is connected to the analysis module, and the acquisition module is used to acquire a first image and a second image of the surface of the device under test; The processing module is connected to the analysis module, and the processing module is used to generate a third image according to the first image and the position signal; The processing module generates a fourth image based on the second image and the third image through a fusion algorithm and feeds the fourth image back to the user end.

2. The device failure detection system according to claim 1, characterized in that: Also includes a transceiver module; The transceiver module is connected to the analysis module, and is used to receive the fluorescence signal and transmit the fluorescence signal to the analysis module.

3. The device failure detection system according to claim 1, characterized in that: It also includes an alarm module; The alarm module is connected to the processing module, and sends out an alarm message when the equipment under test has an oil leakage fault; wherein the alarm message includes at least one of the following: a voice reminder, a buzzer reminder, and a light reminder.

4. The device failure detection system according to claim 3, characterized in that: Also includes a display module; The display module is connected to the processing module, and is used to display the first image, the second image, the third image, and the fourth image.

5. The device failure detection system according to claim 1, characterized in that: The light source module includes an ultraviolet semiconductor laser.

6. The device failure detection system according to claim 1, characterized in that: The acquisition module includes a first acquisition unit and a second acquisition unit; The first acquisition unit is used to acquire the first image, and the second acquisition unit is used to acquire the second image.

7. The device failure detection system according to claim 6, characterized in that: The first acquisition unit includes an ultraviolet light camera; the second acquisition unit includes a visible light camera.

8. The device failure detection system according to claim 4, characterized in that: The display module includes a display screen.

9. A method for detecting equipment failure, characterized in that: A detection system for equipment failure according to any one of claims 1 to 8, comprising: Acquire a first image and a second image of the device under test; When the device under test has an oil leakage fault, the oil film on the surface of the device under test receives the ultraviolet laser signal to excite a fluorescence signal, and a position signal is generated according to the fluorescence signal; A third image is generated according to the first image and the position signal, and a fourth image is generated through a fusion algorithm based on the second image and the third image and fed back to the user end.

10. The method for detecting equipment failure according to claim 9, characterized in that: After a fourth image is generated based on the second image and the third image by a fusion algorithm and fed back to the user end, the method further includes: Sending an alarm message to the user terminal, wherein the alarm message includes at least one of the following: a voice reminder, a buzzer reminder, and a light reminder.

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