Outdoor high-voltage drop-out fuse

Abstract

The application relates to the technical field of fuses, and provides an outdoor high-voltage drop-out fuse, which comprises a fuse tube and a pull ring; the fuse tube is provided with a motion mark; the fuse tube is used for bearing a fuse body and cutting off a circuit when the fuse body is fused to cause drop-out; the pull ring is arranged on the fuse tube; the fuse tube comprises a tube body, a tube cap and upper and lower movable contacts arranged at two ends of the tube body; the tube body is provided with a motion mark which is used for assisting in obtaining an actual motion track of the fuse tube in motion stroke detection; the tube body is used for bearing the fuse body; the tube cap is installed at one end of the tube body and is close to the upper movable contact; the pull ring is arranged on the tube body and is close to the upper movable contact; the upper movable contact is clamped on an upper static contact to be tightly connected; and the lower movable contact is sleeved on a lower static contact. The outdoor high-voltage drop-out fuse provided by the application can solve the problems of motion track deviation and abnormal opening caused by deformation of the tube body and abrasion or oxidation of the movable contact.

Description

Outdoor high-voltage drop-out fuse Technical Field

[0001] This application relates to the field of fuse technology, and more particularly to an outdoor high-voltage drop-out fuse. Background Technology

[0002] Outdoor high-voltage drop-out fuses are a type of protective device widely used in outdoor high-voltage power lines. Their main function is to cut off the circuit by melting the fuse itself when a circuit fault or overload occurs, thereby protecting the safe operation of power equipment and lines.

[0003] In practical applications of outdoor high-voltage drop-out fuses, the fuse tube may drop out due to a short-circuit fault. After the drop, the fuse tube needs to be visually inspected by personnel. However, when the fuse tube is subjected to impact or internal arcing, its body may undergo slight deformation, and the moving contact may show wear or oxidation after arcing. Although these defects are difficult to detect with the naked eye, they can alter the trajectory of the fuse tube during the drop, leading to incomplete closing or changes in the resistance during opening, causing problems such as trajectory jamming or deviation, or even abnormal opening, ultimately causing the fuse to lose its protective function. Summary of the Invention

[0004] This application provides an outdoor high-voltage drop-out fuse, which can improve the technical problems existing in related technologies, such as incomplete closing or changes in opening resistance caused by tube deformation and wear or oxidation of moving contacts, resulting in jamming, deviation or abnormal opening of the movement trajectory.

[0005] In a first aspect, embodiments of this application provide an outdoor high-voltage drop-out fuse, including an insulator fixed on a support of a tower, an upper terminal and a lower terminal disposed at both ends of the insulator, an upper stationary contact fixedly disposed at the upper terminal, and a lower stationary contact fixedly disposed at the lower terminal; the outdoor high-voltage drop-out fuse further includes:

[0006] A fusible tube, with its two ends detachably mounted on the upper stationary contact and the lower stationary contact, respectively; the fusible tube is provided with a motion marker; the fusible tube is used to carry the molten material and to cut off the circuit when the molten material melts, causing it to fall; and

[0007] A pull ring is disposed on the fusible tube and close to the upper stationary contact;

[0008] The molten tube includes a tube body, a tube cap, and upper and lower moving contacts disposed at both ends of the tube body. Motion marks are provided on the tube body to assist in obtaining the actual movement trajectory of the molten tube during motion stroke detection. The tube body carries the molten material. The tube cap can be disconnected or locked onto the upper stationary contact, and the tube body is detachably disposed on the lower stationary contact. The tube cap is installed at one end of the tube body, close to the upper moving contact. A pull ring is disposed on the tube body, close to the upper moving contact. The upper moving contact is locked onto the upper stationary contact for a tight connection. The lower moving contact is sleeved on the lower stationary contact. Motion marks are provided on the tube body.

[0009] The technical solutions described in this application embodiment have at least the following technical effects:

[0010] The outdoor high-voltage drop-out fuse provided in this application embodiment detects the movement stroke of the fuse tube before installation using motion markers set on the tube body, enabling the acquisition of the actual movement trajectory of the fuse tube. Compared to the traditional method of relying on visual inspection of the fuse tube's appearance by workers, this solution can accurately detect changes in the movement trajectory caused by defects that are difficult to detect with the naked eye, such as minor deformation of the tube body, wear or oxidation of the moving contact. This effectively avoids problems such as incomplete closing, changes in opening resistance caused by these defects, leading to problems such as movement trajectory jamming, deviation, or abnormal opening, thereby improving the stability and reliability of the outdoor high-voltage drop-out fuse operation and better ensuring the safe operation of power equipment and lines.

[0011] In a second aspect, embodiments of this application provide a method for detecting the travel of the fuse tube of a drop-out fuse, used to detect the outdoor high-voltage drop-out fuse described in the first aspect; the outdoor high-voltage drop-out fuse further includes a lower support, the lower support being disposed below the lower terminal block; the method includes:

[0012] The simulation operation of the fuse is carried out from the closed state to the open state, and multiple motion images corresponding to the complete process are acquired; wherein, the complete process is the process of the upper moving contact on the fuse tube starting from the separation of the upper stationary contact, to its rotation around the lower support and finally coming to rest in the suspended position.

[0013] A first image, a second image, and multiple third images are determined from the multiple motion images; wherein, the first image is used to indicate the image when the circuit is closed and stable, the second image is used to indicate the image when the circuit is open and stable, and the third image is used to indicate the image at a certain moment during the motion process from the closed state to the open state;

[0014] Identify a first motion marker point in the first image, a second motion marker point in the second image, and a third motion marker point in each of the multiple third images from the first image, the second image, and multiple third images; wherein, the first motion marker point is the motion marker on the molten tube in the first image, the second motion marker point is the motion marker on the molten tube in the second image, and the third motion marker point is the motion marker on the molten tube in the third image;

[0015] The position of the first pixel is determined based on the first motion marker point, the position of the second pixel is determined based on the second motion marker point, and the position of each third pixel is determined based on each of the third motion marker points.

[0016] A two-dimensional pixel coordinate system is established with the central reference point on the insulator as the origin;

[0017] Determine the first pixel position, the second pixel position, and each of the third pixel positions relative to the central reference point, respectively, as follows:

[0018] Actual motion data is obtained based on the first pixel displacement vector, the second pixel displacement vector, and each of the third pixel displacement vectors; wherein, the actual motion data is used to indicate the actual motion trajectory of the molten tube;

[0019] The actual motion data is analyzed to determine the detection data.

[0020] The technical solutions described in this application embodiment have at least the following technical effects:

[0021] The method for detecting the motion stroke of the fuse tube in a drop-out fuse provided in this application simulates the complete process of the fuse from the closed state to the open state and acquires multiple motion images corresponding to the complete process; it determines a first image, a second image, and multiple third images from the multiple motion images, and then accurately determines key state images and intermediate process images from these images; it identifies a first motion marker point in the first image, a second motion marker point in the second image, and each third motion marker point in the multiple third images from the first image, the second image, and the multiple third images; it determines the position of a first pixel based on the first motion marker point, the position of a second pixel based on the second motion marker point, and the position of each third pixel based on each third motion marker point; and it establishes a system with the center reference point on the insulator as the origin. A two-dimensional pixel coordinate system is established; the displacement vectors of the first pixel position, the second pixel position, and each third pixel position relative to the central reference point are determined respectively; the actual motion data is obtained based on the displacement vectors of the first pixel position, the second pixel position, and each third pixel position; the actual motion data is analyzed to determine the detection data, thereby accurately obtaining the actual motion trajectory of the fuse tube, so as to accurately detect the changes in motion trajectory caused by defects that are difficult to be detected by the naked eye, such as small deformation of the tube body, wear or oxidation of the moving contact, which can effectively avoid subsequent problems such as incomplete closing, deviation of motion trajectory or abnormal opening caused by changes in resistance during opening motion due to these defects, thus improving the stability and reliability of outdoor high voltage drop-out fuse operation. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a structural schematic diagram of the outdoor high-voltage drop-out fuse provided in an embodiment of this application;

[0024] Figure 2 is a structural schematic diagram of the outdoor high-voltage drop-out fuse provided in an embodiment of this application from another direction;

[0025] Figure 3 is a flowchart illustrating the method for detecting the travel of the fuse tube of a drop-out fuse according to an embodiment of this application;

[0026] Figure 4 is a schematic diagram of the implementation process of step S200 in the method for detecting the motion stroke of the fuse tube of a drop-out fuse provided in the embodiment of this application;

[0027] Figure 5 is a schematic diagram of the implementation process of step S600 in the method for detecting the motion stroke of the fuse tube of a drop-out fuse provided in the embodiment of this application;

[0028] Figure 6 is a schematic diagram of the motion travel detection system of the fuse tube of the drop-out fuse provided in an embodiment of this application;

[0029] Figure 7 is a schematic diagram of the control device provided in an embodiment of this application.

[0030] The following are the labeling elements in the figure:

[0031] 100. Outdoor high-voltage drop-out fuse; 10. Insulator; 20. Upper terminal block; 30. Lower terminal block; 40. Upper stationary contact; 50. Lower stationary contact; 60. Fusible tube; 61. Tube body; 611. Movement marker; 62. Tube cap; 63. Upper moving contact; 64. Lower moving contact; 70. Pull ring. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0035] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In this application, "and / or" is merely a way of describing the relationship between related objects, indicating that three relationships can exist; for example, A and / or B can represent three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0038] It should be noted that in this application, the words "in some embodiments," "exemplarily," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "in some embodiments," "exemplarily," or "for example" should not be construed as being more preferred or advantageous than other embodiments or design solutions. Specifically, the use of words such as "in some embodiments," "exemplarily," and "for example" is intended to present related concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above words in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0039] Outdoor high-voltage drop-out fuses are a type of protective device widely used in outdoor high-voltage power lines. Their main function is to cut off the circuit by melting the fuse itself when a circuit fault or overload occurs, thereby protecting the safe operation of power equipment and lines.

[0040] In practical applications of outdoor high-voltage drop-out fuses, the fuse tube may drop out due to a short-circuit fault. After the drop, the fuse tube needs to be visually inspected by personnel. However, when the fuse tube is subjected to impact or internal arcing, its body may undergo slight deformation, and the moving contact may show wear or oxidation after arcing. Although these defects are difficult to detect with the naked eye, they can alter the trajectory of the fuse tube during the drop, leading to incomplete closing or changes in the resistance during opening, causing problems such as trajectory jamming or deviation, or even abnormal opening, ultimately causing the fuse to lose its protective function.

[0041] Based on this, in order to improve the problems in related technologies that cause incomplete closing or changes in the resistance of opening movement due to pipe deformation and wear or oxidation of moving contacts, resulting in jamming, deviation or abnormal opening of the movement trajectory, the embodiments of this application provide the following solutions.

[0042] Please refer to Figures 1 and 2 together. This application embodiment provides an outdoor high-voltage drop-out fuse 100, including an insulator 10 fixed on a support of a tower, an upper terminal 20 and a lower terminal 30 disposed at both ends of the insulator 10, an upper stationary contact 40 fixedly disposed at the upper terminal 20, and a lower stationary contact 50 fixedly disposed at the lower terminal 30; the outdoor high-voltage drop-out fuse 100 also includes a fuse tube 60 and a pull ring 70, wherein:

[0043] The two ends of the fuse tube 60 are detachably mounted on the upper stationary contact 40 and the lower stationary contact 50, respectively; the fuse tube 60 is provided with a motion mark 611; the fuse tube 60 is used to carry the molten material and cut off the circuit when the molten material melts, so as to cause it to fall.

[0044] The pull ring 70 is located on the fusible tube 60 and is close to the upper stationary contact 40.

[0045] The molten tube 60 includes a tube body 61, a tube cap 62, and upper moving contacts 63 and lower moving contacts 64 disposed at both ends of the tube body 61. The tube body 61 is provided with motion markers 611, which are used to assist in obtaining the actual movement trajectory of the molten tube 60 during motion stroke detection. The tube body 61 is used to carry the molten material. The tube cap 62 can be disconnected or locked onto the upper stationary contact 40, and the tube body 61 is detachably disposed on the lower stationary contact 50. The tube cap 62 is installed at one end of the tube body 61, close to the upper moving contact 63. A pull ring 70 is disposed on the tube body 61, close to the upper moving contact 63. The upper moving contact 63 is locked at the upper stationary contact 40 for a tight connection. The lower moving contact 64 is sleeved on the lower stationary contact 50. The tube body 61 is provided with motion markers 611.

[0046] It is understood that the insulator 10, the upper terminal 20 and lower terminal 30 disposed at both ends of the insulator 10, the upper stationary contact 40 fixedly disposed at the upper terminal 20, and the lower stationary contact 50 fixedly disposed at the lower terminal 30 are all structures in the prior art, such as the RW4-10 type drop-out high-voltage fuse. In addition, the fuse tube 60 (tube body 61, tube cap 62, and upper moving contact 63 and lower moving contact 64 disposed at both ends of the tube body 61) and the pull ring 70 are also structures in the RW4-10 type drop-out high-voltage fuse. Among them, the motion mark 611 is a mark disposed on the tube body 61, such as a scale line, color block, or specific pattern mark, but not limited to these.

[0047] As can be seen from the above, the outdoor high-voltage drop-out fuse 100 provided in this application embodiment detects the movement stroke of the fuse tube 60 before installation using motion markers 611 set on the tube body 61, thus enabling the acquisition of the actual movement trajectory of the fuse tube 60. Compared to the traditional method of relying on visual inspection of the fuse tube 60 by workers, this solution can accurately detect changes in the movement trajectory caused by defects that are difficult to detect with the naked eye, such as minor deformation of the tube body 61, wear or oxidation of the moving contact. This effectively avoids problems such as incomplete closing, changes in opening resistance caused by these defects, leading to problems such as movement trajectory jamming, deviation, or abnormal opening, thereby improving the stability and reliability of the outdoor high-voltage drop-out fuse 100 and better ensuring the safe operation of power equipment and lines.

[0048] In some embodiments, please refer to Figures 1 and 2 together. Multiple motion marks 611 are provided on the tube body 61 of the fusion tube 60, and the position of each motion mark 611 is opposite to that of the insulator 10.

[0049] It is understood that there can be multiple motion markers 611, such as 2, 3 or 4, but not limited to these. If set to 3, 2 or 4, they can be irregularly positioned (the height and distance can be different) on the tube body 61 of the fusible tube 60, but the motion markers 611 cannot overlap.

[0050] This configuration allows multiple motion markers 611 to provide richer information for motion stroke detection from different positions and angles. During the detection process, the actual motion trajectory of the fusible tube 60 is determined by the positions reported by the multiple motion markers 611. For example, when the motion trajectory of the fusible tube 60 changes slightly due to minor deformation of the tube body 61 or wear of the moving contact, the changes shown by the motion markers 611 at different positions will differ. By comparing these differences, the location of defects and their specific impact on the motion trajectory can be identified more accurately.

[0051] Optionally, in some embodiments, referring to Figures 1 and 2 together, the marking patterns of the multiple motion markers 611 are different.

[0052] It is understood that the marking pattern can be a triangle, circle, square, or rhombus, but is not limited to these.

[0053] With this setup, the motion markers 611 with different patterns can be quickly distinguished and identified during the detection process, which helps to improve the accuracy and efficiency of identification.

[0054] This application embodiment also provides a method for detecting the travel of the fuse tube of a drop-out fuse, used to detect outdoor high-voltage drop-out fuses in any of the above embodiments; the outdoor high-voltage drop-out fuse further includes a lower support, which is disposed below the lower terminal block; the method includes:

[0055] The simulation operation of the fuse from the closed state to the open state is completed, and multiple motion images corresponding to the complete process are acquired. The complete process is the process from the upper moving contact on the fuse tube separating from the upper stationary contact, to its rotation around the lower support and finally coming to rest in the suspended position.

[0056] A first image, a second image, and multiple third images are determined from multiple motion images; wherein, the first image is used to indicate the image when the circuit is closed and stable, the second image is used to indicate the image when the circuit is open and stable, and the third image is used to indicate the image at a certain moment during the motion process from the closed state to the open state;

[0057] Identify a first motion marker point in the first image, a second motion marker point in the second image, and a third motion marker point in each of the multiple third images from the first image, the second image, and multiple third images; wherein, the first motion marker point is a motion marker on the molten tube in the first image, the second motion marker point is a motion marker on the molten tube in the second image, and the third motion marker point is a motion marker on the molten tube in the third image;

[0058] The position of the first pixel is determined based on the first motion marker point, the position of the second pixel is determined based on the second motion marker point, and the position of each third pixel is determined based on each third motion marker point.

[0059] A two-dimensional pixel coordinate system is established with the central reference point on the insulator as the origin;

[0060] Determine the first pixel displacement vector, second pixel displacement vector, and third pixel displacement vector of each of the first pixel position, second pixel position, and third pixel position relative to the center reference point;

[0061] The actual motion data is obtained based on the first pixel displacement vector, the second pixel displacement vector, and each third pixel displacement vector; the actual motion data is used to indicate the actual motion trajectory of the fusible tube.

[0062] Analyze the actual motion data to determine the detection data.

[0063] The technical solutions described in this application embodiment have at least the following technical effects:

[0064] The method for detecting the motion stroke of the fuse tube in a drop-out fuse provided in this application simulates the complete process of the fuse from the closed state to the open state and acquires multiple motion images corresponding to the complete process; it determines a first image, a second image, and multiple third images from the multiple motion images, and then accurately determines key state images and intermediate process images from these images; it identifies a first motion marker point in the first image, a second motion marker point in the second image, and each third motion marker point in the multiple third images from the first image, the second image, and the multiple third images; it determines the position of a first pixel based on the first motion marker point, the position of a second pixel based on the second motion marker point, and the position of each third pixel based on each third motion marker point; and it uses the center reference point on the insulator as the reference point. A two-dimensional pixel coordinate system is established. The displacement vectors of the first pixel position, the second pixel position, and each third pixel position relative to the central reference point are determined. The actual motion data is obtained based on the displacement vectors of the first pixel position, the second pixel position, and each third pixel position. The actual motion data is analyzed to determine the detection data, which can accurately obtain the actual motion trajectory of the fuse tube. This allows for the identification of motion trajectory changes caused by defects that are difficult to detect with the naked eye, such as minor deformation of the tube body, wear or oxidation of the moving contact. This can effectively avoid subsequent problems such as incomplete closing, motion trajectory deviation due to changes in resistance during opening movement, or abnormal opening caused by these defects, thereby improving the stability and reliability of outdoor high-voltage drop-out fuses.

[0065] The method for detecting the travel of the fuse tube in a drop-out fuse provided in this application embodiment can be applied to a test device for drop-out fuses. In this case, the test device is the executing entity of the method for detecting the travel of the fuse tube in a drop-out fuse provided in this application embodiment. This application embodiment does not impose any restrictions on the specific type of test device.

[0066] The testing equipment includes a control device, an image acquisition device, and a testing platform for outdoor high-voltage drop-out fuses, on which the outdoor high-voltage drop-out fuses are mounted. The testing platform may include...

[0067] The system includes, but is not limited to, structural frames for fixing and supporting outdoor high-voltage drop-out fuses, and electrical connections and control circuits for simulating actual working environments. An image acquisition device is used to acquire image information of the fuse tube during its movement; the control device is communicatively connected to the image acquisition device to receive and process the image information. The control device can be a computer device with data processing and analysis capabilities, such as an industrial control computer, but is not limited to this. The image acquisition device can employ high-definition cameras or high-speed cameras, but is not limited to these.

[0068] To better understand the method for detecting the movement stroke of the fuse tube in a drop-out fuse provided in this application embodiment, the specific implementation process of the method for detecting the movement stroke of the fuse tube in a drop-out fuse provided in this application embodiment will be described below by way of example.

[0069] Figure 3 shows a schematic flowchart of the motion stroke detection method for the fuse tube of a drop-out fuse provided in an embodiment of this application. The motion stroke detection method for the fuse tube of a drop-out fuse includes:

[0070] S100 simulates the complete process of the fuse from the closed state to the open state and acquires multiple motion images corresponding to the complete process; wherein, the complete process is the process of the upper moving contact on the fuse tube starting from the separation of the upper stationary contact, to its rotation around the lower support and finally coming to rest in the suspended position.

[0071] It can be understood that simulating the complete process of a fuse from the closed state to the open state can be understood as making the fuse move according to the actual opening action process, thereby completely reproducing the entire dynamic change process of the fuse tube from the closed to the open state.

[0072] For example, acquiring multiple motion images corresponding to the complete process can be achieved by using a high-speed camera or other imaging equipment to obtain motion images of the simulated process.

[0073] In one possible implementation, S100, the complete process of operating the fuse from the closed state to the open state is simulated, and multiple motion images corresponding to the complete process are acquired, including:

[0074] S110 simulates the complete process of operating a fuse from the closed state to the open state, and acquires a continuous video stream of the movement of the fuse tube.

[0075] For example, acquiring a continuous video stream of the fuse tube's movement can be achieved by using video acquisition equipment such as a high-speed camera to continuously capture the movement of the fuse tube during the simulated operation, thereby obtaining a continuous video stream of the fuse tube's movement. The continuous video stream can completely record the entire dynamic change process of the fuse tube from the closed state to the open state.

[0076] S120 decodes the continuous video stream and splits it into multiple moving images according to the frame sequence.

[0077] For example, continuous video stream decoding converts a continuous video stream into a digital signal, and then uses video decoding technology to convert it into a sequence of image frames. Frame-by-frame splitting separates these image frames one by one, forming multiple continuous motion images. These motion images can clearly show the state of the fuse tube at every instant during the analog operation.

[0078] This setup, by acquiring continuous video streams and decoding them into multiple moving images, allows for a comprehensive and detailed recording of every dynamic detail of the fusible tube during the simulation operation. Compared to acquiring only a limited number of static images, this method provides richer and more complete visual information, facilitating a more accurate analysis of the fusible tube's actual trajectory and providing detailed and accurate visual evidence for subsequent trajectory analysis.

[0079] S200, determine a first image, a second image, and multiple third images from multiple motion images; wherein, the first image is used to indicate the image when the circuit is closed and stable, the second image is used to indicate the image when the circuit is open and stable, and the third image is used to indicate the image at a certain moment during the motion process from the closed state to the open state.

[0080] For example, a first image, a second image, and multiple third images are determined from multiple motion images according to selection criteria. The selection criteria are that the images conform to the characteristics of the closed stable state, the open stable state, and a specific moment during the movement from closing to opening. Specifically, the first image should clearly show the position of the fuse tube in the closed stable state, at which time the upper moving contact and the upper stationary contact are tightly connected; the second image should accurately present the state of the fuse tube in the open stable state, at which time the upper moving contact has detached from the upper stationary contact, the fuse tube rotates around the lower support, and finally comes to rest in the suspended position; while the multiple third images should cover the entire movement process from closing to opening, with each image corresponding to a different moment, reflecting the dynamic changes of the fuse tube during this process, such as the rotation angle and speed changes of the tube body.

[0081] In one possible implementation, referring to Figure 4, S200, determining a first image, a second image, and multiple third images from multiple moving images includes:

[0082] S210, among multiple motion images, the image in which the upper moving contact and the upper stationary contact on the fusible tube are in maximum contact is determined as the first image.

[0083] For example, select an image from multiple motion images that meets the requirements (the upper moving contact and the upper stationary contact on the fuse tube are in the maximum contact state); specifically, the maximum contact state means that the connection between the upper moving contact and the upper stationary contact is the tightest, and the fuse tube is in a stable closed state. This image can accurately reflect the position and state of the fuse tube in the stable closed state.

[0084] S220, among multiple motion images, the image in which the lower moving contact of the fusible tube contacts the lower support wall is determined as the second image.

[0085] For example, images that meet specific conditions (the lower moving contact of the fuse tube is in contact with the lower support wall) are selected from multiple motion images. Specifically, when the lower moving contact of the fuse tube is in contact with the lower support wall, it indicates that the fuse tube has completed the tripping action and is in a stable state. This image can accurately show the position and shape of the fuse tube in the stable tripping state. Whether it meets the conditions can be determined with the assistance of personnel.

[0086] S230, within the time interval from the time corresponding to the first image to the time corresponding to the second image, select multiple images to determine as multiple third images.

[0087] For example, the time interval from the moment corresponding to the first image (the moment of stable closing state) to the moment corresponding to the second image (the moment of stable opening state) covers the entire movement process of the fuse tube from closing to opening. Multiple images are selected within this time interval as multiple third images. These third images can cover various stages of the fuse tube's movement, with each image corresponding to a different moment, reflecting the dynamic changes of the fuse tube during this process, such as the rotation angle and speed changes of the tube body. This provides comprehensive visual information for subsequent accurate analysis of the actual movement trajectory of the fuse tube.

[0088] In one possible implementation, referring to Figure 4, S230, multiple images are selected from the time interval between the corresponding time of the first image and the corresponding time of the second image to determine multiple third images, including:

[0089] S231, based on the time interval from the time corresponding to the first image to the time corresponding to the second image, determine multiple time images corresponding to 25%, 50%, and 75% of the time interval.

[0090] For example, the time interval from the moment corresponding to the first image to the moment corresponding to the second image can be understood as a complete action and time cycle from the end of closing to the end of opening due to a short circuit or other reasons. Determining multiple moment images corresponding to 25%, 50%, and 75% of this time interval is to select representative time node images from the entire process of the fuse tube's movement. The image at 25% of the time shows the state of the fuse tube in the initial stage of the transition from closing to opening; the image at 50% of the time shows the intermediate stage where the fuse tube is in the middle of its movement, with the rotation angle and speed reaching a certain level; and the image at 75% of the time reflects the later stage where the fuse tube is approaching a stable opening state, with the rotation speed gradually slowing down. By acquiring images at these specific moments, the key node states of the fuse tube during its movement can be captured more comprehensively and meticulously, providing a basis for subsequent accurate analysis of the actual movement trajectory of the fuse tube.

[0091] S232, determines multiple time-based images as multiple third images.

[0092] For example, the images at the determined times, namely the images corresponding to the 25%, 50%, and 75% times, are explicitly defined as multiple third images, reflecting the dynamic changes of the fuse tube from closing to opening at different stages.

[0093] With this setup, by comprehensively analyzing the third images at different times, the actual trajectory of the fuse tube during the entire movement process can be depicted more accurately. This effectively detects changes in the movement trajectory caused by defects such as minor deformation of the tube body, wear or oxidation of the moving contact, and avoids situations where closing is incomplete or changes in opening resistance are caused by these defects.

[0094] S300, identify a first motion marker point in the first image, a second motion marker point in the second image, and a third motion marker point in each of the multiple third images from the first image, the second image, and multiple third images; wherein, the first motion marker point is a motion marker on the molten tube in the first image, the second motion marker point is a motion marker on the molten tube in the second image, and the third motion marker point is a motion marker on the molten tube in the third image.

[0095] For example, the identification of corresponding motion markers from the first image, the second image, and multiple third images is achieved through image marker recognition. Specifically, image recognition technology is used to locate and identify the fuse tube portion in each image, thereby determining the specific position of the motion markers set on the fuse tube in the image. For the first image, the motion markers on the fuse tube are identified as the first motion markers; for the second image, the motion markers on the fuse tube are similarly identified as the second motion markers; and for the multiple third images, motion marker recognition is performed on the fuse tube in each image to obtain the third motion markers in each third image. These points record the position of the motion markers at different times during the fuse tube's movement from closing to opening. In this way, the position information of the motion markers in different states can be accurately obtained, laying the foundation for subsequent analysis of the actual movement trajectory of the fuse tube.

[0096] S400, determine the position of the first pixel based on the first motion marker, determine the position of the second pixel based on the second motion marker, and determine the position of each third pixel based on each third motion marker.

[0097] It can be understood that pixel position refers to the specific coordinate position of the motion marker point in the image.

[0098] For example, the first pixel position of a first motion marker in the first image is determined based on the first motion marker point in the first image. This position can be represented by coordinate values ​​in the image coordinate system. Similarly, the second motion marker point in the second image is identified, and its second pixel position in the second image is determined. For each third motion marker point in multiple third images, its third pixel position in each image is determined by coordinate values ​​in the image coordinate system. By obtaining this pixel position information, crucial data support is provided for the subsequent accurate calculation of the actual motion trajectory of the fusible tube.

[0099] S500 establishes a two-dimensional pixel coordinate system with the center reference point on the insulator as the origin.

[0100] It can be understood that a two-dimensional pixel coordinate system is a coordinate system based on an image plane, with a specific origin and two mutually perpendicular coordinate axes. In this application, the center reference point on the insulator is chosen as the origin because the position of the insulator in a drop-out fuse is relatively fixed, and using its center as the origin can provide a stable and reliable reference for subsequent image-based analysis of the fuse tube's movement trajectory.

[0101] For example, when establishing a two-dimensional pixel coordinate system, first determine the central reference point on the insulator and define this point as the origin (0,0). Then, based on the actual situation of the image, select the horizontal and vertical directions as the x-axis and y-axis, respectively. For example, the horizontal direction to the right can be defined as the positive x-axis direction, and the vertical direction downward can be defined as the positive y-axis direction, thus constructing a complete two-dimensional pixel coordinate system.

[0102] This setup, by establishing a two-dimensional pixel coordinate system, provides a unified coordinate framework for accurately calculating the actual movement trajectory of the fuse tube. Combined with the first pixel position, second pixel position, and each third pixel position obtained earlier, it can effectively detect changes in the movement trajectory caused by defects such as minor deformation of the tube body, wear or oxidation of the moving contact, and avoid situations where the closing is incomplete or the opening resistance changes due to defects.

[0103] S600, respectively determine the first pixel displacement vector, second pixel displacement vector, and third pixel displacement vector of the first pixel position, the second pixel position, and each third pixel position relative to the center reference point.

[0104] As can be understood, a pixel displacement vector is a vector pointing from the central reference point to the corresponding pixel position, which can represent the positional change of the moving marker point relative to the central reference point.

[0105] For example, for the first pixel position, the first pixel displacement vector is obtained by calculating the coordinate difference between it and the central reference point in the two-dimensional pixel coordinate system. The magnitude and direction of this vector reflect the degree of offset of the first moving marker point relative to the central reference point in the image. The same calculation is performed on the second pixel position to determine the second pixel displacement vector. For each third pixel position, the coordinate difference between it and the central reference point is calculated to obtain the third pixel displacement vector. These pixel displacement vectors can accurately describe the positional changes of the moving marker point relative to the central reference point under different states, providing important quantitative data for subsequent accurate analysis of the actual motion trajectory of the fused tube.

[0106] In one possible implementation, referring to Figure 5, S600, the first pixel displacement vector, second pixel displacement vector, and third pixel displacement vector of each of the first pixel position, second pixel position, and third pixel position relative to the center reference point are determined, including:

[0107] S610, determine the origin coordinates based on the central reference point.

[0108] It can be understood that the origin coordinates are the starting point of the two-dimensional pixel coordinate system. When determining the origin coordinates, the center reference point on the insulator is used as the reference, and its specific coordinate values ​​in the image coordinate system are set as the origin coordinates (0,0). For example, if the horizontal coordinate of the insulator's center reference point in the image is determined to be x0 and the vertical coordinate to be y0, then the origin coordinates are determined to be (x0, y0). This coordinate serves as the reference starting point for calculating all pixel displacement vectors subsequently.

[0109] S620, calculate the difference between the position of the first pixel and the coordinates of the origin to obtain the displacement vector of the first pixel.

[0110] For example, if the coordinates of the first pixel position in the two-dimensional pixel coordinate system are (x1, y1) and the coordinates of the origin are (x0, y0), then the displacement vector of the first pixel can be obtained by calculating (x1-x0, y1-y0).

[0111] S630, calculate the difference between the second pixel position and the origin coordinates to obtain the second pixel displacement vector.

[0112] For example, if the coordinates of the second pixel position in the two-dimensional pixel coordinate system are (x2, y2) and the coordinates of the origin are (x0, y0), then the displacement vector of the second pixel is (x2-x0, y2-y0).

[0113] S640, then calculate the difference between the position of each third pixel and the coordinates of the origin in turn to obtain multiple third pixel displacement vectors.

[0114] For example, for each third pixel position in multiple third images, such as the third pixel position coordinates in the i-th third image being (x3i, y3i) and the origin coordinates being (x0, y0), then the displacement vector of the i-th third pixel is (x3i-x0, y3i-y0), where i = 1, 2, ..., n (n is the number of third images). These third pixel displacement vectors can record in detail the position changes of the fuse tube relative to the central reference point at different times during the movement from closing to opening, providing data support for subsequent comprehensive analysis of the actual movement trajectory of the fuse tube.

[0115] With this setup, the first pixel displacement vector, the second pixel displacement vector, and multiple third pixel displacement vectors are determined through the above steps. These vectors, based on a unified origin coordinate (the center reference point on the insulator), can accurately and quantitatively reflect the positional changes of the moving marker points on the fuse tube relative to the center reference point under different states. This allows for more accurate calculation and analysis of the actual movement trajectory of the fuse tube, and effectively detects changes in the movement trajectory caused by defects such as minor deformation of the tube body, wear or oxidation of the moving contact.

[0116] S700, actual motion data is obtained based on the first pixel displacement vector, the second pixel displacement vector and each third pixel displacement vector; wherein, the actual motion data is used to indicate the actual motion trajectory of the fusible tube.

[0117] For example, after obtaining the first pixel displacement vector, the second pixel displacement vector, and each third pixel displacement vector, the discrete pixel displacement vector data is converted into continuous actual motion trajectory data. For instance, the first and second pixel displacement vectors represent the positions of the fuse tube relative to the central reference point in the closed and open stable states, respectively, while each third pixel displacement vector records the position changes of the fuse tube at various moments during its movement. By plotting the trajectory of these vectors, the complete actual motion trajectory of the fuse tube from closing to opening can be obtained.

[0118] In one possible implementation, S700 obtains the actual motion data based on the first pixel displacement vector, the second pixel displacement vector, and each of the third pixel displacement vectors, including:

[0119] S710, in chronological order, connects the endpoints of the first pixel displacement vector, each third pixel displacement vector, and the second pixel displacement vector sequentially to obtain the motion trajectory curve.

[0120] For example, the endpoints of these pixel displacement vectors are connected in chronological order because the movement of the fuse tube is a continuous process, starting from the closed stable state, passing through intermediate states, and finally reaching the open stable state. Taking the first pixel displacement vector as the starting point, representing the position of the fuse tube in the closed stable state, the endpoints of each third pixel displacement vector are connected sequentially in chronological order, representing the position changes of the fuse tube at various moments during the movement. Finally, the endpoint of the second pixel displacement vector is taken as the ending point, representing the position of the fuse tube in the open stable state. By connecting these points, a complete motion trajectory curve can be obtained, which can intuitively and accurately show the actual motion trajectory of the fuse tube.

[0121] S720 determines the motion trajectory curve as actual motion data.

[0122] For example, the obtained motion trajectory curve is determined as the actual motion data; this curve contains the position change information of the fuse tube from the closed stable state to the open stable state throughout the process, and can clearly reflect the motion state of the fuse tube at each moment, such as whether there is any abnormal trajectory deviation.

[0123] The S800 analyzes actual motion data to determine the detection data.

[0124] For example, when analyzing actual motion data, the obtained motion trajectory curve can be compared with a pre-set standard motion trajectory curve. The standard motion trajectory curve is the trajectory formed from the closed stable state to the open stable state under ideal conditions, i.e., when the fuse tube has no minor deformation of the tube body, wear or oxidation of the moving contact, or other defects. By comparing the differences between the two, it is possible to intuitively discover whether there are any abnormalities in the actual motion trajectory. For example, if the actual motion trajectory curve deviates significantly from the standard trajectory curve at certain positions, it may mean that there is a problem with the movement of the fuse tube at those positions.

[0125] Simultaneously, relevant parameters of the motion trajectory curve can be analyzed. For example, the curvature change of the curve can be calculated, as curvature reflects the rate of change of the rotation angle of the fused tube during movement. If the curvature abnormally increases or decreases at certain moments, the fused tube may not rotate smoothly, possibly due to wear of the moving contact or deformation of the tube body. Additionally, the movement speed at different times can be calculated to observe whether the speed changes conform to normal patterns. If a sudden change in speed occurs at a certain stage, such as a sudden increase or decrease, this may indicate that the fused tube has encountered additional resistance or other abnormalities during movement, or it may be caused by defects such as oxidation.

[0126] This setup allows for accurate determination of test data, which clearly reflects whether the fuse tube exhibits changes in its movement trajectory due to defects such as minor deformation of the tube body, wear or oxidation of the moving contact, thus ensuring the normal operation of outdoor high-voltage drop-out fuses.

[0127] In one possible implementation, S800 analyzes the actual motion data to determine the detection data, including:

[0128] S810 performs an overlap analysis between the actual motion trajectory indicated by the actual motion data and the ideal motion trajectory to obtain analysis result data; wherein, the analysis result data is used to indicate the degree of deviation between the actual motion trajectory and the ideal motion trajectory.

[0129] It is understandable that the ideal motion trajectory is a standard trajectory formed from the closed stable state to the open stable state under the condition that the fuse tube has no defects, such as no minor deformation of the tube body, no wear or oxidation of the moving contact, etc. Overlay analysis of the actual motion trajectory and the ideal motion trajectory means placing them in the same coordinate system and comparing the differences at various positions. The analysis results obtained through this method can intuitively show the degree of deviation between the actual motion trajectory and the ideal motion trajectory. For example, the distance difference between the two at various coordinate points can be calculated, and the magnitude of these differences reflects the degree of deviation. For example, the greater the deviation, the greater the influence of defects such as minor deformation of the tube body, wear or oxidation of the moving contact, etc., during the actual movement of the fuse tube.

[0130] S820 determines the detection data based on the analysis results.

[0131] For example, after obtaining the analysis results data, a pre-set deviation threshold is used to determine whether the fusible tube has defects. If the deviation in the analysis results data exceeds the set threshold, it indicates that there is a significant difference between the actual movement trajectory of the fusible tube and the ideal movement trajectory. In this case, it can be determined that the detection data indicates that the fusible tube has changes in its movement trajectory due to defects such as minor deformation of the tube body, wear or oxidation of the moving contact. Conversely, if the deviation is within the threshold range, the detection data indicates that the fusible tube is moving normally and there are no movement trajectory changes caused by the aforementioned defects. This allows for a determination of whether the fusible tube can be used normally, thus assessing its usability.

[0132] In summary, accurate detection of the actual movement trajectory of the fuse tube can effectively detect changes in the fuse tube's movement trajectory caused by defects such as minor deformation of the tube body, wear or oxidation of the moving contact, etc. This provides reliable technical support for ensuring the normal operation of outdoor high-voltage drop-out fuses, helps to identify potential problems in advance, and enables timely maintenance and replacement, thereby improving the stability and safety of the power system and reducing accidents such as power outages caused by fuse failures.

[0133] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0134] Corresponding to the method for detecting the travel of the fuse tube in a drop-out fuse described in the above embodiments, this application also provides a system for detecting the travel of the fuse tube in a drop-out fuse. Each unit of this system can implement each step of the method for detecting the travel of the fuse tube in a drop-out fuse. Figure 6 shows a structural block diagram of the system for detecting the travel of the fuse tube in a drop-out fuse provided in this application embodiment. For ease of explanation, only the parts relevant to this application embodiment are shown.

[0135] Referring to Figure 6, the motion travel detection system for the fuse tube of the drop-out fuse includes:

[0136] The simulation unit is used to simulate the complete process of operating the fuse from the closed state to the open state, and to acquire multiple motion images corresponding to the complete process; wherein, the complete process is the process of the upper moving contact on the fuse tube starting from disengaging from the upper stationary contact, rotating around the lower support and finally coming to rest in the suspended position.

[0137] The first determining unit is used to determine a first image, a second image, and multiple third images from multiple motion images; wherein, the first image is used to indicate the image when the circuit is closed and stable, the second image is used to indicate the image when the circuit is open and stable, and the third image is used to indicate the image at a certain moment during the motion process from the closed state to the open state.

[0138] The recognition unit is used to identify a first motion marker point in the first image, a second motion marker point in the second image, and a third motion marker point in each of the multiple third images from a first image, a second image, and multiple third images; wherein, the first motion marker point is a motion marker on the molten tube in the first image, the second motion marker point is a motion marker on the molten tube in the second image, and the third motion marker point is a motion marker on the molten tube in the third image.

[0139] The second determining unit is used to determine the position of the first pixel based on the first motion marker point, determine the position of the second pixel based on the second motion marker point, and determine the position of each third pixel based on each third motion marker point.

[0140] Establish a unit to create a two-dimensional pixel coordinate system with the center reference point on the insulator as the origin;

[0141] The third determining unit is used to determine the first pixel displacement vector, the second pixel displacement vector, and the third pixel displacement vector of each of the first pixel position, the second pixel position, and each of the third pixel positions relative to the center reference point, respectively.

[0142] The processing unit is used to obtain actual motion data based on the first pixel displacement vector, the second pixel displacement vector, and each third pixel displacement vector; wherein, the actual motion data is used to indicate the actual motion trajectory of the molten tube;

[0143] The results unit is used to analyze actual motion data and determine the detection data.

[0144] It should be noted that the information interaction and execution process between the above systems / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0145] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the system can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0146] Figure 7 is a schematic diagram of the structure of a control device provided in an embodiment of this application. As shown in Figure 7, the control device 8 of this embodiment includes: at least one processor 80 (only one is shown in Figure 7), at least one memory 81 (only one is shown in Figure 7), and a computer program 82 stored in the at least one memory 81 and executable on the at least one processor 80. When the processor 80 executes the computer program 82, it causes the control device 8 to implement the steps in the above embodiments of the motion stroke detection method for the fuse tube of any of the drop-out fuses, or to implement the functions of each module / unit in the above embodiments of the system.

[0147] For example, the computer program 82 may be divided into one or more modules / units, which are stored in the memory 81 and executed by the processor 80 to complete this application. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 82 in the control device 8.

[0148] The control device 8 may include, but is not limited to, a processor 80 and a memory 81. Those skilled in the art will understand that Figure 7 is merely an example of the control device 8 and does not constitute a limitation on the control device 8. It may include more or fewer components than shown, or combine certain components, or different components, such as input / output devices, network access devices, buses, etc.

[0149] The processor 80 can be a Central Processing Unit (CPU), or it can be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor.

[0150] In some embodiments, the memory 81 may be an internal storage unit of the control device 8, such as a hard disk or memory of the control device 8. In other embodiments, the memory 81 may be an external storage device of the control device 8, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the control device 8. Further, the memory 81 may include both internal storage units and external storage devices of the control device 8. The memory 81 is used to store operating systems, applications, bootloaders, data, and other programs, such as the program code of computer programs. The memory 81 can also be used to temporarily store data that has been output or will be output.

[0151] This application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps in any of the above method embodiments.

[0152] This application provides a computer program product that, when run on a test device, enables the test device to implement the steps in any of the above method embodiments.

[0153] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include at least: any entity or device capable of carrying the computer program code to an assembly device, a recording medium, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium. Examples include USB flash drives, portable hard drives, magnetic disks, or optical disks.

[0154] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0155] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0156] In the embodiments provided in this application, it should be understood that the disclosed drop-out fuse tube movement travel detection system, testing equipment, and method can be implemented in other ways. For example, the embodiments of the drop-out fuse tube movement travel detection system and testing equipment described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices, or units, and may be electrical, mechanical, or other forms.

[0157] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0158] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for detecting the travel of the fuse tube in a drop-out fuse, applied to the detection of outdoor high-voltage drop-out fuses; characterized in that, The outdoor high-voltage drop-out fuse includes a fuse tube; the fuse tube includes a tube body; motion markers are provided on the tube body, and the motion markers are used to assist in obtaining the actual movement trajectory of the fuse tube during motion stroke detection; the method includes: simulating the complete process of operating the fuse from the closed state to the open state, and acquiring multiple motion images corresponding to the complete process; wherein, the complete process is the process of the upper moving contact on the fuse tube starting from disengaging from the upper stationary contact, rotating around the lower support, and finally coming to rest in the suspended position; determining a first image, a second image, and multiple third images from the multiple motion images; wherein, the first image is used to indicate the image when the closed state is stable, the second image is used to indicate the image when the open state is stable, and the third image is used to indicate the image at a certain moment in the movement process from the closed state to the open state; identifying a first motion marker point in the first image, a second motion marker point in the second image, and each third motion marker point in the multiple third images from the first image, the second image, and the multiple third images; wherein, the first motion marker point is the motion marker on the fuse tube in the first image, the second motion marker... The point is the motion mark on the fused tube in the second image, and the third motion mark point is the motion mark on the fused tube in the third image; the first pixel position is determined according to the first motion mark point, the second pixel position is determined according to the second motion mark point, and the third pixel position is determined according to each of the third motion mark points; a two-dimensional pixel coordinate system is established with the center reference point on the insulator as the origin; the first pixel displacement vector, the second pixel displacement vector, and the third pixel displacement vector of each of the first pixel position, the second pixel position, and the third pixel position relative to the center reference point are determined respectively; actual motion data is obtained according to the first pixel displacement vector, the second pixel displacement vector, and the third pixel displacement vector; wherein, the actual motion data is used to indicate the actual motion trajectory of the fused tube; the actual motion data is analyzed to determine the detection data; wherein, the obtained actual motion trajectory curve is compared with the ideal motion trajectory curve, and the relevant parameters of the motion trajectory curve are analyzed to finally determine the detection data, the detection data reflecting whether the fused tube has changes in motion trajectory caused by defects such as small deformation of the tube body, wear or oxidation of the moving contact.

2. The method for detecting the travel of the fuse tube in a drop-out fuse as described in claim 1, characterized in that, The fusion tube has multiple motion marks on its tube body, and each motion mark is positioned away from the insulator.

3. The method for detecting the travel of the fuse tube in a drop-out fuse as described in claim 2, characterized in that, The marking patterns of the multiple motion markers are different.

4. The method for detecting the travel of the fuse tube in a drop-out fuse as described in claim 1, characterized in that, The step of determining the first image, the second image, and multiple third images from multiple motion images includes: determining the image in which the upper moving contact and the upper stationary contact on the fusible tube are in maximum contact as the first image; determining the image in which the lower moving contact of the fusible tube is in contact with the lower support wall as the second image; and then selecting multiple images from the time interval between the corresponding time of the first image and the corresponding time of the second image to determine the multiple third images.

5. The method for detecting the travel of the fuse tube in a drop-out fuse as described in claim 4, characterized in that, The step of selecting multiple images from the time interval between the time corresponding to the first image and the time corresponding to the second image to determine multiple third images includes: determining multiple time images corresponding to 25%, 50%, and 75% of the time interval based on the time interval between the time corresponding to the first image and the time corresponding to the second image; and determining multiple time images as multiple third images.

6. The method for detecting the travel of the fuse tube in a drop-out fuse as described in claim 1, characterized in that, The step of determining the first pixel position, the second pixel position, and each of the third pixel positions relative to the central reference point, respectively, includes: determining the origin coordinates based on the central reference point; calculating the difference between the first pixel position and the origin coordinates to obtain the first pixel displacement vector; calculating the difference between the second pixel position and the origin coordinates to obtain the second pixel displacement vector; and then sequentially calculating the difference between each of the third pixel positions and the origin coordinates to obtain multiple third pixel displacement vectors.

7. The method for detecting the travel of the fuse tube in a drop-out fuse as described in claim 1, characterized in that, The step of obtaining actual motion data based on the first pixel displacement vector, the second pixel displacement vector, and each of the third pixel displacement vectors includes: sequentially connecting the endpoints of the first pixel displacement vector, each of the third pixel displacement vectors, and the second pixel displacement vector in chronological order to obtain a motion trajectory curve; and determining the motion trajectory curve as the actual motion data.

8. The method for detecting the travel of the fuse tube in a drop-out fuse as described in claim 1, characterized in that, The step of analyzing the actual motion data to determine the detection data includes: performing an overlap analysis between the actual motion trajectory indicated by the actual motion data and the ideal motion trajectory to obtain analysis result data; wherein the analysis result data is used to indicate the degree of deviation between the actual motion trajectory and the ideal motion trajectory; and determining the detection data based on the analysis result data.

9. The method for detecting the travel of the fuse tube in a drop-out fuse as described in claim 1, characterized in that, The simulation of the complete process of the fuse operating from the closed state to the open state, and the acquisition of multiple motion images corresponding to the complete process, includes: simulating the complete process of the fuse operating from the closed state to the open state, and acquiring a continuous video stream of the movement of the fuse tube; decoding the continuous video stream and splitting it into multiple motion images according to the frame sequence.

Images