An abnormality searching device, method and equipment for a laid mineral insulated cable

Abstract

The application discloses a device, method and equipment for checking abnormalities of a laid mineral insulated cable, and belongs to the technical field of power facilities. The device comprises: a laying track acquisition module, which is used to acquire a track line of the laid mineral insulated cable; a position of interest determination module, which is used to determine a position of interest according to the track line; and a flaw detection module, which is used to perform nondestructive flaw detection on the position of interest based on a nondestructive flaw detection means to determine whether the position of interest has an abnormality. According to the technical scheme, the position of the mineral insulated cable where damage defects are prone to occur can be checked for abnormalities through the laying track of the mineral insulated cable, maintenance personnel can be helped to timely repair the abnormal position, the insulation of the mineral insulated cable is prevented from being too low and electric breakdown from occurring, the safe operation of a power system is maintained, the service life is prolonged, and the maintenance cost of the mineral insulated cable is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power facilities, and particularly relates to an abnormality checking device, method and equipment for a laid mineral insulated cable. BACKGROUND

[0002] Cables are related to all aspects of life such as information transmission, industrial operation, traffic operation, etc. Once a fault occurs, it will have a huge impact on people's production and life. Therefore, China attaches great importance to the operation and maintenance of cables. One of the direct causes of cable failure is the breakdown phenomenon caused by the decrease of the insulation performance of the insulation layer.

[0003] Currently, there are mainly two methods for detecting the fault of the running cable, namely online detection and flaw detection. Online detection refers to judging the insulation condition by measuring the insulation resistance, dielectric loss and other technical data of the cable without power-off; flaw detection refers to detecting whether there is a defect on the surface or inside the part of the cable to judge the insulation condition.

[0004] However, online monitoring can only determine whether the cable is abnormal, but cannot find the specific location of the fault point; flaw detection needs manual checking along the cable track line for the entire cable system, which is very time-consuming 。 SUMMARY

[0005] The purpose of the embodiment of the application is to provide an abnormality checking device, method and equipment for a laid mineral insulated cable, which aims to detect whether the mineral insulated cable is abnormal and the specific location of the abnormality, help maintenance personnel repair the abnormal location before the mineral insulated cable fails, and ensure the reliable operation of the mineral insulated cable.

[0006] In a first aspect, the embodiment of the application provides an abnormality checking device for a laid mineral insulated cable, which comprises:

[0007] A laying track acquisition module is configured to acquire a track line of the laid mineral insulated cable.

[0008] A focus position determination module is configured to determine a focus position according to the track line.

[0009] A flaw detection module is configured to perform non-destructive flaw detection on the focus position based on a non-destructive flaw detection method to determine whether the focus position is abnormal.

[0010] In a second aspect, the embodiment of the application provides an abnormality checking method for a laid mineral insulated cable, which comprises:

[0011] A laying track acquisition module is configured to acquire a track line of the laid mineral insulated cable.

[0012] determining a focus position according to the trajectory line by a focus position determining module;

[0013] detecting the focus position by a flaw detection module based on a non-destructive flaw detection method to determine whether the focus position has an abnormality.

[0014] In a third aspect, an electronic device is provided, which includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, and the program or instructions, when executed by the processor, implement the steps of the method according to the first aspect.

[0015] In a fourth aspect, a readable storage medium is provided, which stores a program or instructions, and the program or instructions, when executed by a processor, implement the steps of the method according to the first aspect.

[0016] In a fifth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the method according to the first aspect.

[0017] In the embodiments of the present application, the laid mineral insulated cable anomaly checking device includes a laid trajectory acquiring module, a focus position determining module, and a flaw detection module. The laid trajectory acquiring module is configured to acquire a trajectory line of a laid mineral insulated cable. The focus position determining module is configured to determine a focus position according to the trajectory line. The flaw detection module is configured to detect the focus position based on a non-destructive flaw detection method to determine whether the focus position has an abnormality.

[0018] The laid mineral insulated cable anomaly checking device can accurately detect the specific position of the laid mineral insulated cable where damage defects occur due to reasons such as excessive bending or deviation, external gas corrosion, and extrusion depression, helps maintenance personnel to repair the abnormal position in time, avoids the mineral insulated cable from having low insulation and causing electrical breakdown, maintains the safe operation of the power system, prolongs the service life, reduces the maintenance cost of the mineral insulated cable, and creates greater economic benefits for the cable industry. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structural schematic diagram of the laid mineral insulated cable anomaly checking device provided by the first embodiment of the present application;

[0020] Figure 2 is a structural schematic diagram of the laid mineral insulated cable anomaly checking device provided by the second embodiment of the present application;

[0021] Figure 3 is a structural schematic diagram of the laid mineral insulated cable anomaly checking device provided by the third embodiment of the present application;

[0022] Figure 4 FIG. 1 is a structural schematic diagram of an abnormality checking device for a laid mineral insulated cable provided by an embodiment of the present application;

[0023] Figure 5 FIG. 2 is a structural schematic diagram of an abnormality checking device for a laid mineral insulated cable provided by another embodiment of the present application;

[0024] Figure 6 FIG. 3 is a structural schematic diagram of an abnormality checking device for a laid mineral insulated cable provided by another embodiment of the present application;

[0025] Figure 7 FIG. 4 is a flow schematic diagram of an abnormality checking method for a laid mineral insulated cable provided by another embodiment of the present application;

[0026] Figure 8 FIG. 5 is a structural schematic diagram of an electronic device provided by another embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the objects, technical solutions and advantages of the present application clearer, the following further describes the specific embodiments of the present application with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application. In addition, it should be noted that only the parts related to the present application are shown in the drawings and not all the parts. Before discussing the example embodiments in more detail, it should be mentioned that some example embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts describe the operations (or steps) as sequential processes, many of the operations can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The processes can be terminated when the operations are completed, but can also have additional steps not included in the drawings. The processes can correspond to methods, functions, procedures, subroutines, etc.

[0028] The technical solutions in the embodiments of the present application will be described clearly with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0029] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally a class, not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the objects before and after are in a "or" relationship.

[0030] The abnormality troubleshooting device, method and equipment for the laid mineral insulated cable provided by the embodiments of the present application will be described in detail below in combination with the drawings, specific embodiments and application scenarios.

[0031] Embodiment one

[0032] Figure 1 is a structural schematic diagram of the abnormality troubleshooting device for the laid mineral insulated cable provided by the first embodiment of the present application. As shown in Figure 1 , specifically includes the following steps:

[0033] The laying track acquisition module 110 is configured to acquire a track line of the laid mineral insulated cable.

[0034] The attention position determination module 120 is configured to determine an attention position according to the track line.

[0035] The flaw detection module 130 is configured to perform non-destructive flaw detection on the attention position based on a non-destructive flaw detection means to determine whether the attention position has an abnormality.

[0036] The present application is applicable to the scene of abnormality troubleshooting of the laid mineral insulated cable. Specifically, the calculation of the bending radius, the offset distance, the gas concentration and the determination of the attention position can be performed by an intelligent terminal device, such as a desktop computer, a notebook computer, a mobile phone, a tablet computer and an interactive multimedia device, etc. The staff can discover the abnormality of the mineral insulated cable in the first time, accurately acquire the abnormal position, reduce the number of faults and ensure the normal power transportation of the mineral insulated cable.

[0037] Based on the above use scenario, it can be understood that the execution subject of the present application can be the intelligent terminal device, which is not limited here.

[0038] The laying track acquisition module 110 can be composed of a micro processing chip of a computer, and is used to acquire a track line of a laid mineral insulated cable. The mineral insulated cable can be a cable wrapped with a copper sheath around a copper conductor core and insulated from the sheath by magnesium oxide powder as inorganic insulation material, which has fire resistance, durability, safety, reliability, construction convenience and economy that cannot be replaced by traditional power cables. The track line can be a curve describing the motion track of an object, and specifically can be an actual laying path of the mineral insulated cable. The acquisition can be performed by using an audio electromagnetic method or a high-voltage impact electromagnetic method, and specifically can be performed by using the audio electromagnetic method. An electromagnetic wave is generated by a transmitter and transmitted to a detected underground cable through different transmission connection modes. After the underground cable senses the electromagnetic wave, an induced current is generated on the surface of the cable. The induced current propagates along the underground cable to a far place and radiates electromagnetic waves to the ground in the propagation process of the current. When a receiver detects on the ground, the electromagnetic wave signal can be received on the ground above the cable. The accurate position of the underground cable can be determined by the strength change of the received signal. The laying can be performed by using buried laying, cable laying along a support, cable laying through a protection pipe, and cable laying on a cable bridge. Specifically, the buried laying with the highest economy and widely used but cannot be observed by naked eyes to observe the cable track line.

[0039] The attention position determination module 120 can be composed of a micro processing chip of a computer, and is used to determine an attention position according to the track line. The attention position can be a position on the track line where the mineral insulated cable can have an abnormality and needs to be focused on by a staff. The abnormality can be a damage to the insulation layer of the mineral insulated cable caused by extrusion depression, damp insulation, chemical corrosion, long-term overload operation, cable joint failure, etc., which reduces the insulation of the mineral insulated cable or even causes the insulation to fail. Such a situation can cause a circuit failure, and even a safety accident. The determination can be performed by identifying the attention position from the bending radius, offset distance, gas concentration, appearance image, etc. of the mineral insulated cable. The bending radius can be the distance between the bending position of the track line of the mineral insulated cable and the center thereof. The offset distance can be the distance between the actual laying point of the mineral insulated cable and the preset point. The gas concentration can be the proportion of the gas capable of corroding the insulation layer of the mineral insulated cable in the air. The appearance image can be a picture file generated and stored in the computer after the appearance of the mineral insulated cable is photographed by a camera.

[0040] The flaw detection module 130, which may be composed of a computer microprocessor chip, is used to determine whether an anomaly exists at the location of interest. Non-destructive testing (NDT) is a technique that detects internal or external defects in an object (component) without damaging it. Currently, five commonly used NDT methods are ultrasonic testing, radiographic testing, penetrant testing, magnetic particle testing, and eddy current testing. Specifically, ultrasonic testing can be used. Its principle is that ultrasonic waves are emitted into the object being tested, and the echo reflected from the defect is received to determine the defect. Ultrasonic testing has a wide range of applications and can provide information such as the size, depth, location, and nature of the defect. The instrument is portable and has low testing costs. The determination method can be to use an ultrasonic flaw detector, pointing the probe towards the location of interest, and observing the defect echo waveform on the ultrasonic flaw detector's display screen to determine whether there is a defect or an anomaly at the location of interest.

[0041] In this application example, the laying trajectory acquisition module is used to acquire the trajectory line of the laid mineral-insulated cable; the focus location determination module is used to determine the focus location based on the trajectory line; and the flaw detection module is used to perform non-destructive testing on the focus location using non-destructive testing methods to determine whether there are any anomalies at the target location. This technical solution can accurately detect the specific location of damage defects in mineral-insulated cables caused by excessive bending or offset, external gas corrosion, or extrusion dents, helping maintenance personnel to repair them promptly, preventing the insulation of the mineral-insulated cable from becoming too low and causing electrical breakdown, maintaining the safe operation of the power system, extending its service life, and reducing the maintenance cost of mineral-insulated cables, thus creating greater economic benefits for the cable industry.

[0042] Example 2

[0043] Figure 2 This is a schematic diagram of the anomaly detection device for laid mineral-insulated cables provided in Embodiment 2 of this application. This solution makes further improvements based on the above embodiments. Specifically, the improvement is as follows: the focus location determination module includes: a bending location determination unit, used to determine the bending location of the mineral-insulated cable according to the trajectory line; a bending radius calculation unit, used to determine the arc range of the bending location according to the trajectory line, and calculate the bending radius of the mineral-insulated cable within the arc range using a fitting algorithm; and a focus location filtering unit, used to determine the location of the arc range where the anomaly probability is higher than a set threshold as the focus location based on the calculated bending radius and the pre-determined correlation between the bending radius and the anomaly probability.

[0044] like Figure 2 As shown, the device includes:

[0045] The laying trajectory acquisition module 210 is configured to acquire a trajectory line of a laid mineral insulated cable.

[0046] The attention position determination module 220 is configured to determine an attention position according to the trajectory line.

[0047] The flaw detection module 230 is configured to perform non-destructive detection on the attention position based on a non-destructive detection means to determine whether the attention position has an abnormality.

[0048] The attention position determination module 220 includes:

[0049] The bending position determination unit 2201 is configured to determine a bending position of the mineral insulated cable according to the trajectory line.

[0050] The bending radius calculation unit 2202 is configured to determine an arc range of the bending position according to the trajectory line, and calculate a bending radius of the mineral insulated cable in the arc range by using a fitting algorithm.

[0051] The attention position screening unit 2203 is configured to determine a position of the arc range with an abnormality probability higher than a set threshold as the attention position according to a calculated bending radius and a pre-determined correlation between the bending radius and the abnormality probability.

[0052] The bending position can be an arc segment of a non-straight form in the trajectory line of the mineral insulated cable. The arc range can be an included angle of a line connecting a starting point and an ending point of the arc segment with a center of a circle. The fitting algorithm can be connecting a series of points on a plane with a smooth curve, and the fitted curve can be generally represented by a function. A commonly used fitting method is a least square curve fitting method, which finds a best matching function of data by minimizing a sum of squares of errors. The abnormality probability can represent a possibility of a crack damage on an outer surface of a bending part of the mineral insulated cable. The correlation can be an inverse relationship, i.e., the smaller the bending radius, the greater the abnormality probability. The set threshold can be an abnormality probability corresponding to a case where the bending radius of the mineral insulated cable is 15 times of an outer diameter thereof. The bending position can be determined by using a Hough transform on the trajectory line of the mineral insulated cable. The Hough transform can be a very important method for detecting discontinuous point boundary shapes, which realizes fitting of straight lines and curves by transforming an image coordinate space to a parameter space. The arc range can be determined by marking the starting point and the ending point of the bending position as A and C respectively, marking an arbitrary point on the bending position as B, connecting A and B and A and C to draw two perpendicular bisectors, marking an intersection of the two perpendicular bisectors as a center of a circle, and measuring an included angle of the two perpendicular bisectors, which is the arc range.

[0053] The mineral insulated cable provided by the technical scheme has the advantages that by detecting the bending position of the mineral insulated cable, calculating the bending radius and determining the concerned position, the maintenance personnel can timely find the crack damage on the outer surface of the bending position with too small bending radius on the mineral insulated cable, and prevent the insulation layer from being damaged and the conductive wire core from being broken, thereby reducing the service life of the mineral insulated cable or preventing the mineral insulated cable from operating normally.

[0054] Embodiment three

[0055] Figure 3 is a structural schematic diagram of an abnormality checking device for the laid mineral insulated cable provided by the third embodiment of the present application. The present scheme is an improved scheme based on the above-mentioned embodiments, and the specific improvement is that the bending radius calculation unit is specifically used for: extracting feature points from the trajectory line according to a first preset distance; determining fitting feature points from the first feature point according to a second preset distance associated with the first preset distance, and calculating the bending radius of the mineral insulated cable in the radian range based on the fitting feature points by using a fitting algorithm; and traversing all the feature points according to a preset step length to obtain the bending radius calculated by each group of fitting feature points.

[0056] As shown in Figure 3 , the device comprises:

[0057] The laying trajectory acquisition module 310 is configured to acquire the trajectory line of the laid mineral insulated cable.

[0058] The concerned position determination module 320 is configured to determine the concerned position according to the trajectory line.

[0059] The flaw detection module 330 is configured to perform non-destructive flaw detection on the concerned position based on a non-destructive flaw detection method to determine whether the concerned position has an abnormality.

[0060] The concerned position determination module 320 comprises:

[0061] The bending position determination unit 3201 is configured to determine the bending position of the mineral insulated cable according to the trajectory line.

[0062] The bending radius calculation unit 3202 is configured to determine the radian range of the bending position according to the trajectory line, and calculate the bending radius of the mineral insulated cable in the radian range by using a fitting algorithm.

[0063] The concerned position screening unit 3203 is configured to determine the position of the radian range with an abnormality probability higher than a set threshold as the concerned position according to the calculated bending radius and the pre-determined correlation between the bending radius and the abnormality probability.

[0064] The first preset distance can be the interval between various feature points at the bend of the mineral-insulated cable. Feature points can be points that represent the bending trend of the mineral-insulated cable, and their coordinates can provide a data basis for calculating the bending radius. The second preset distance can be the length of the mineral-insulated cable trajectory line segment containing multiple feature points at the bend. The fitted feature points can be all feature points contained on the mineral-insulated cable trajectory line segment with a length equal to the second preset distance. The preset step size can be the distance between each visited feature point during the traversal, specifically twice the first preset distance. Traversal can be the behavior of visiting feature points once every preset step length along the mineral-insulated cable bending trajectory line, and averaging the bending radii calculated from each visit. Visiting can be the behavior of using a fitting algorithm to calculate the bending radius of the mineral-insulated cable trajectory line segment with the visited feature point as the starting point and the second preset distance as the length. Feature point extraction can be achieved by marking a point every 1 cm along the mineral-insulated cable bending trajectory line. The association method can be to calculate the second preset distance by multiplying the first preset distance by a certain factor, specifically 4.

[0065] The advantage of this technical solution is that by selecting multiple line segments at the bending position of the mineral-insulated cable and calculating the bending radius using a fitting algorithm and average value calculation on these multiple line segments, surface damage at the bending position of the mineral-insulated cable can be effectively detected, greatly improving the detection efficiency and accuracy of damage to the mineral-insulated cable.

[0066] Example 4

[0067] Figure 4 This is a schematic diagram of the anomaly detection device for laid mineral-insulated cables provided in Embodiment 4 of this application. This solution makes further improvements based on Embodiment 1, specifically: the focus location determination module includes: a point extraction unit for extracting points based on the trajectory line; an offset distance determination unit for determining the offset distance between the previous point and the current point according to a first direction and calculating the offset distance of the next point; and a focus location determination unit for obtaining a third preset distance, and determining the locations of the previous point, the current point, and the next point as focus locations if the offset distance is greater than the third preset distance.

[0068] like Figure 4 As shown, the device includes:

[0069] The laying trajectory acquisition module 410 is used to acquire the trajectory line of the laid mineral insulated cable;

[0070] The attention position determination module 420 is used to determine the attention position based on the trajectory line;

[0071] The flaw detection module 430 is configured to perform non-destructive detection on the attention position based on a non-destructive detection method to determine whether the attention position has an abnormality.

[0072] The attention position determination module 420 includes:

[0073] The point position extraction unit 4201 is configured to extract point positions based on the trajectory line.

[0074] The offset distance determination unit 4202 is configured to determine an offset distance of a next point position from a current point position and a previous point position in a first direction.

[0075] The attention position determination unit 4203 is configured to obtain a third preset distance, and determine a position of the previous point position, the current point position, and the next point position as the attention position when the offset distance is greater than the third preset distance.

[0076] The point position can be a position of a point marked at a certain distance on the mineral insulated cable trajectory line. The certain distance can be 30 cm. The first direction can be a starting direction of the actual laying of the mineral insulated cable. The third preset distance can be a maximum offset distance of the mineral insulated cable that can occur, which is generally 10 cm. The offset distance can be determined by connecting the previous point position and the current point position to determine a straight line (if the current point position is the starting point position, the previous point position is not present, and the straight line can coincide with the first direction), extending 30 cm from the current point position on the straight line to determine a preset point position, and measuring a distance between the preset point position and the next point position. The attention position can be determined by determining that the mineral insulated cable trajectory line between the previous point position and the next point position is the attention position when the offset distance exceeds 10 cm.

[0077] The technical solution has the advantage that by calculating the offset distance of each point position of the mineral insulated cable trajectory line, the maintenance personnel can timely find damage to the mineral insulated cable caused by the excessive offset distance of the mineral insulated cable laid in an unknown geographical environment, prevent the insulation of the mineral insulated cable from being degraded and the mineral insulated cable from malfunctioning, and solve the problems of long detection period, high cost, poor accessibility, and high missed detection rate of the traditional manual detection.

[0078] Embodiment Five

[0079] Figure 5is a structural schematic view of an abnormality checking device for a laid mineral insulated cable provided by Embodiment Five of the present application. The present scheme is a more optimal improvement based on Embodiment One, and the specific improvement is that the position of interest determining module comprises: an environmental data acquisition unit configured to acquire whether a target gas exists in the environmental gas; a gas concentration detection unit configured to, in the case that the target gas exists in the environmental gas, detect concentration data of the target gas; and a position of interest determining unit configured to determine a coverage range according to the concentration data, and determine the position of interest according to the position where the target gas exists and the coverage range.

[0080] As shown in Figure 5 the device comprises:

[0081] a laid track acquisition module 510 configured to acquire a track line of the laid mineral insulated cable;

[0082] a position of interest determining module 520 configured to determine a position of interest according to the track line;

[0083] a flaw detection module 530 configured to perform non-destructive flaw detection on the position of interest based on a non-destructive flaw detection means to determine whether the position of interest has an abnormality.

[0084] The position of interest determining module 520 comprises:

[0085] an environmental data acquisition unit 5201 configured to acquire whether a target gas exists in the environmental gas;

[0086] a gas concentration detection unit 5202 configured to, in the case that the target gas exists in the environmental gas, detect concentration data of the target gas;

[0087] a position of interest determining unit 5203 configured to determine a coverage range according to the concentration data, and determine the position of interest according to the position where the target gas exists and the coverage range.

[0088] The environmental gas can be air existing in the environment of the mineral insulated cable, which is composed of multiple gases. The target gas can be an acidic or alkaline gas capable of corroding the insulation layer of the mineral insulated cable, such as ammonia, hydrogen sulfide. The concentration data can be the amount of substance (moles) of solute contained in a unit volume, and the specific solute can be the target gas. The coverage range can be a section of the mineral insulated cable track line where the concentration data of the target gas is not 0. The acquisition method can use a wet purple litmus paper to test, and the test paper turns blue to represent the presence of ammonia, and the test paper turns red to represent the presence of hydrogen sulfide. The detection method can use a gas detector, and the display screen of the gas detector can display the concentration data of the target gas by connecting the pump suction pipe interface of the gas detector to the target gas. The method for determining the coverage range can be to detect the concentration of the target gas forward and backward along the mineral insulated cable track line from the position of the mineral insulated cable where the wet purple litmus paper changes color, until the concentration data is 0, and mark the position where the concentration data is 0 as the starting point or the end point of the coverage range. The attention position can be consistent with the coverage range of the target gas.

[0089] The advantage of the technical solution is that by detecting the concentration of the gas around the mineral insulated cable, it can be determined whether the gas around the mineral insulated cable will corrode the insulation layer of the mineral insulated cable and cause damage to the insulation layer, preventing the insulation of the mineral insulated cable from decreasing and causing failure.

[0090] Embodiment six

[0091] Figure 6 is a structural schematic diagram of an abnormality troubleshooting device for a laid mineral insulated cable provided by the embodiment six of the present application. The present solution makes a more optimal improvement on the basis of the embodiment one, and the specific improvement is that the attention position determining module comprises: an image recognition unit, configured to recognize whether a target feature exists in the mineral insulated cable image data; wherein the target feature comprises an extrusion deformation feature, a scratch feature, and a local depression feature; and an attention position determining unit, configured to determine an attention position according to the position of the target feature.

[0092] As shown in Figure 6 , the device comprises:

[0093] The laying track acquisition module 610 is configured to acquire a track line of the laid mineral insulated cable.

[0094] The attention position determining module 620 is configured to determine an attention position according to the track line.

[0095] The flaw detection module 630 is configured to perform non-destructive flaw detection on the attention position based on a non-destructive flaw detection means to determine whether the attention position has an abnormality.

[0096] The attention position determination module 620 comprises:

[0097] The image recognition unit 6201 is configured to recognize whether a target feature exists in the mineral insulated cable image data, wherein the target feature comprises an extrusion deformation feature, a scratch feature, and a local indentation feature.

[0098] The attention position determination unit 6202 is configured to determine an attention position according to the position of the target feature.

[0099] The image data can be a picture file generated and stored in a computer after a camera shoots the appearance of the mineral insulated cable. The extrusion deformation feature can be a phenomenon that the mineral insulated cable changes the original morphology and cannot be restored after being extruded by the surrounding environment. The scratch feature can be a phenomenon that a trace is left on the surface of the mineral insulated cable after a sharp object and the surface of the mineral insulated cable slide against each other. The local indentation feature can be a phenomenon that part of the surface of the mineral insulated cable bends downward after being hit by an object. The recognition can be performed by manual checking or an image recognition algorithm to determine whether the mineral insulated cable in the image data has the extrusion deformation feature, the scratch feature, and the local indentation feature. The image recognition algorithm can correctly classify the categories to which the image content belongs by counting the pixel distribution, color, texture, and other features in the image, and then compare each category with the target feature to complete the task of recognizing the target feature.

[0100] The technical solution has the advantages that by recognizing the deformation, scratch, and indentation that can exist on the mineral insulated cable and determining the attention position, the maintenance personnel can timely find the mechanical damage to the mineral insulated cable caused by non-standard laying construction or changes in the surrounding environment after operation, and timely repair the damaged part before a serious failure occurs and the mineral insulated cable cannot operate normally.

[0101] Embodiment Seven

[0102] Figure 7 is a flowchart of the abnormality checking method of the laid mineral insulated cable provided in Embodiment One of the present application. As shown in Figure 7 , the method comprises the following steps:

[0103] S701, acquiring a track line of the laid mineral insulated cable by a laying track acquisition module;

[0104] S702, determining an attention position according to the track line by an attention position determination module;

[0105] S703, performing non-destructive detection on the attention position based on a non-destructive detection method by a defect detection module to determine whether the attention position has an abnormality.

[0106] In the technical solution, the attention position is determined according to the trajectory line by the attention position determination module, including:

[0107] The bending position of the mineral insulated cable is determined according to the trajectory line by the bending position determination unit;

[0108] The bending position is determined according to the trajectory line by the bending radius calculation unit, and the bending radius of the mineral insulated cable in the bending position is calculated by using a fitting algorithm;

[0109] The position of the bending position range with an abnormal probability higher than a set threshold is determined as the attention position by the attention position screening unit according to the calculated bending radius and the pre-determined association between the bending radius and the abnormal probability.

[0110] The point position is extracted based on the trajectory line by the point position extraction unit;

[0111] The offset distance of the next point position is determined according to the first direction by the offset distance determination unit based on the previous point position and the current point position;

[0112] The position of the previous point position, the current point position and the next point position is determined as the attention position by the attention position determination unit when the offset distance is greater than a third preset distance.

[0113] Whether the target gas exists in the environmental gas is determined by the environmental data acquisition unit;

[0114] The concentration data of the target gas is detected by the gas concentration detection unit when the target gas exists in the environmental gas;

[0115] The coverage range is determined according to the concentration data by the attention position determination unit, and the attention position is determined according to the position of the target gas and the coverage range.

[0116] Whether the target feature exists in the mineral insulated cable image data is identified by the image recognition unit; wherein the target feature includes the extrusion deformation feature, the scratch feature and the local concave feature;

[0117] The attention position is determined according to the position of the target feature by the attention position determination unit.

[0118] In this embodiment, the trajectory of the laid mineral-insulated cable is acquired by a laying trajectory acquisition module; a location of interest determination module determines the location of interest based on the trajectory; and a flaw detection module performs non-destructive testing on the location of interest using non-destructive testing methods to determine whether any abnormalities exist at the location of interest. Through the above-described method for troubleshooting abnormalities in laid mineral-insulated cables, the specific locations of damage defects caused by excessive bending or offset, external gas corrosion, or compression dents can be accurately detected. This helps maintenance personnel to repair the cables promptly, preventing low insulation and electrical breakdown, maintaining the safe operation of the power system, extending service life, and reducing maintenance costs, thus creating greater economic benefits for the cable industry.

[0119] The method for troubleshooting abnormalities in laid mineral-insulated cables provided in this application embodiment has the same functional modules and beneficial effects as the device for troubleshooting abnormalities in laid mineral-insulated cables provided in the above embodiments. To avoid repetition, it will not be described again here.

[0120] Example 8

[0121] like Figure 8 As shown, this application embodiment also provides an electronic device 800, including a processor 801, a memory 802, and a program or instructions stored in the memory 802 and executable on the processor 801. When the program or instructions are executed by the processor 801, they implement the various processes of the above-described abnormal investigation device embodiment for laid mineral insulated cables and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0122] It should be noted that the electronic devices in the embodiments of this application include the mobile electronic devices and non-mobile electronic devices described above.

[0123] Example 9

[0124] This application also provides a readable storage medium storing a program or instructions. When the program or instructions are executed by a processor, they implement the various processes of the above-described anomaly detection device embodiment for laid mineral-insulated cables and achieve the same technical effect. To avoid repetition, they will not be described again here.

[0125] The processor is the processor in the electronic device described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0126] Example 10

[0127] The chip provided by the embodiment of the present application comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used to run programs or instructions, realizes the processes of the above-mentioned abnormality troubleshooting device for the laid mineral insulated cable, and can achieve the same technical effects. To avoid repetition, details are not described here.

[0128] It should be understood that the chip mentioned in the embodiment of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0129] It should be noted that in this paper, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiment of the present application is not limited to the order of functions shown or discussed, but can also include functions performed in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method can be performed in an order different from the described order, and various steps can also be added, omitted or combined. In addition, the features described with reference to some examples can be combined in other examples.

[0130] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment method can be realized by software and necessary general hardware platform, of course, it can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM / RAM, magnetic disc, optical disc), including a plurality of instructions for making a terminal (which can be a mobile phone, computer, server or network equipment, etc.) execute the method described in each embodiment of the present application.

[0131] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the scope of the present application and the scope protected by the claims.

[0132] The above merely describes the preferred embodiments of the present application and the technical principles applied. The present application is not limited to the specific embodiments described herein, and various obvious changes, modifications and replacements made by those skilled in the art without departing from the scope of the present application shall not be excluded. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and more other equivalent embodiments can be included without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. An anomaly detection device for laid mineral-insulated cables, characterized in that, The device includes: The laying trajectory acquisition module is used to acquire the trajectory lines of the laid mineral-insulated cables; The focus location determination module is used to determine the focus location based on the trajectory line; The flaw detection module is used to perform non-destructive testing on the location of interest using non-destructive testing methods to determine whether there are any abnormalities at the location of interest. The focus location determination module includes: a bending location determination unit, used to determine the bending location of the mineral-insulated cable based on the trajectory line; a bending radius calculation unit, used to determine the arc range of the bending location based on the trajectory line, and use a fitting algorithm to calculate the bending radius of the mineral-insulated cable within the arc range; and a focus location filtering unit, used to determine the location of the arc range where the abnormal probability is higher than a set threshold as the focus location based on the calculated bending radius and the pre-determined correlation between the bending radius and the abnormal probability. The bending radius calculation unit is specifically used for: extracting feature points from the trajectory line according to a first preset distance; determining fitting feature points starting from the first feature point based on a second preset distance associated with the first preset distance, and calculating the bending radius of the mineral insulated cable within the arc range based on the fitting feature points using a fitting algorithm; and traversing all feature points according to a preset step size to obtain the bending radius calculated from each set of fitting feature points.

2. The anomaly detection device for laid mineral-insulated cables according to claim 1, characterized in that, The focus location determination module can also be implemented in the following ways: A point extraction unit is used to extract points based on the trajectory line; The offset distance determination unit is used to determine the offset distance of the next point based on the previous point and the current point in the first direction; The focus position determination unit is used to obtain a third preset distance, and when the offset distance is greater than the third preset distance, the positions of the previous point, the current point, and the next point are determined as focus positions.

3. A method for troubleshooting anomalies in laid mineral-insulated cables, characterized in that, The method includes: The laying trajectory acquisition module acquires the trajectory line of the laid mineral-insulated cable; The focus location determination module determines the focus location based on the trajectory line; The flaw detection module performs non-destructive testing on the location of interest using non-destructive testing methods to determine whether there are any abnormalities at the location of interest. The step of determining the location of interest based on the trajectory line by the location of interest determination module includes: determining the bending position of the mineral-insulated cable based on the trajectory line by the bending position determination unit; determining the arc range of the bending position based on the trajectory line by the bending radius calculation unit, and calculating the bending radius of the mineral-insulated cable within the arc range using a fitting algorithm; and determining the location of the arc range where the abnormal probability is higher than a set threshold as the location of interest by the location of the calculated bending radius and the pre-determined correlation between the bending radius and the abnormal probability by the location of the location of the arc range. The step of determining the arc range of the bending position based on the trajectory line by the bending radius calculation unit and calculating the bending radius of the mineral-insulated cable within the arc range using a fitting algorithm includes: extracting feature points from the trajectory line at a first preset distance; determining fitting feature points starting from the first feature point based on a second preset distance associated with the first preset distance, and calculating the bending radius of the mineral-insulated cable within the arc range based on the fitting feature points using a fitting algorithm; and traversing all feature points according to a preset step size to obtain the bending radius calculated from each set of fitting feature points.

4. An electronic device, characterized in that, It includes a processor, a memory, and a program or instructions stored in the memory and executable on the processor, wherein the program or instructions, when executed by the processor, implement the steps of the anomaly detection method for laid mineral-insulated cables as described in claim 3.

Images