Inspection Process for an Environmentally Friendly, Cold-Resistant and Flame-Retardant Power Cable

Abstract

The present invention relates to the technical field of power cables, and particularly relates to an environmentally friendly, cold-resistant and flame-retardant power cable and its process, including: setting a sampling ratio, sampling the cables produced in the same batch based on the sampling ratio to obtain cable samples; loading the cable samples on inspection equipment, controlling the operation of the inspection equipment, transmitting the cable samples, configuring the cable sample image acquisition logic, and collecting the cable sample image data based on the cable sample image acquisition logic during the transmission of the cable samples on the inspection equipment; the present invention simulates the state presented by the cable surface sheath when the environmentally friendly, cold-resistant and flame-retardant power cable is stressed in a cold state through specific inspection equipment, further conducts a safety assessment of the cable based on the collection of cable sheath image data, finally realizes the qualified determination of the cable, ensures that the quality of the produced cable is guaranteed, and thus ensures that the inspection and maintenance requirements after the cable is put into use are lower.

Description

Technical Field

[0001] The present invention relates to the technical field of power cables, and particularly relates to an inspection process for an environmentally friendly, cold-resistant, and flame-retardant power cable. Background Art

[0002] An environmentally friendly, cold-resistant, and flame-retardant power cable is a cable with special properties, which is usually used in power transmission and other fields with high environmental requirements, relatively cold climates, and certain fire safety requirements.

[0003] A patent for invention with the application number 202310050627.7 discloses an early warning cable detection system, which is characterized by including a node association unit, a data acquisition unit, an early warning analysis unit, a historical database, an early warning unit, and a processor; the node association unit is communicatively connected to the processor, the node association unit is also communicatively connected to the historical database, the early warning analysis unit is communicatively connected to the processor, the data acquisition unit is communicatively connected to the processor, and the early warning unit is communicatively connected to the processor; the node association unit is used for associating nodes according to the relationships between the nodes, obtaining the first-level association points, second-level association points, and third-level association points corresponding to each node according to the association results, and uploading the first-level association points, second-level association points, and third-level association points corresponding to each node to the processor; the processor uploads the first-level association points, second-level association points, and third-level association points corresponding to each node to the historical database; the data acquisition unit is used for obtaining the temperature and current of each node every preset time T1, respectively marking the obtained temperature and current of the node, and uploading them to the processor, and the processor uploads the received temperature and current of the node to the historical database: the early warning analysis unit performs in-path data detection according to the association results and the temperature and current information of the nodes transmitted by the data acquisition unit, obtains abnormal nodes, and locates the abnormal direction of the cable: the early warning analysis unit uploads the abnormal nodes and the located abnormal direction of the cable to the processor.

[0004] This application aims to solve the problem of "lacking the accuracy of early warning for potential operation failures of the cable itself and the cable network in current cable management".

[0005] However, compared with the installation environment of the environmentally friendly, cold-resistant, and flame-retardant power cable, due to its special use scenario, it is difficult to carry out daily inspections, resulting in the particularly important quality inspection during the production stage. Moreover, there are many constraints on the detection conditions for the cold-resistant performance during the detection of the environmentally friendly, cold-resistant, and flame-retardant power cable in the production stage, and current detection technologies usually cannot accurately detect the cold-resistant ability of the environmentally friendly, cold-resistant, and flame-retardant power cable. Summary of the Invention

[0006] In view of the above-mentioned disadvantages of the prior art, the present invention provides an inspection process for an environmentally friendly, cold-resistant and flame-retardant power cable, which solves the technical problems raised in the above-mentioned background art.

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] An inspection process for an environmentally friendly, cold-resistant and flame-retardant power cable includes:

[0009] Set a sampling ratio, sample the cables produced in the same batch based on the sampling ratio to obtain cable samples;

[0010] Load the cable samples onto the inspection equipment, control the operation of the inspection equipment, transmit the cable samples, configure the cable sample image acquisition logic, and during the transmission of the cable samples on the inspection equipment, collect the cable sample image data based on the cable sample image acquisition logic;

[0011] Obtain the cable sample image data, pick up the pixels representing the cable sheath in the cable sample image data, based on the pixel values of the picked-up pixels, capture the pixels with the same pixel values as the picked-up pixels in the cable sample image data, determine the cable sheath area image in the cable sample image data through the captured pixels, segment the cable sheath area image from the cable sample image data, convert the segmented cable sheath area image into a grayscale image, after the cable sheath area image is converted into a grayscale image, restore the grayscale image to the segmentation position in the cable sample image data, and evaluate the safety of the cable sample by applying the cable sample image data with the grayscale image;

[0012] The safety evaluation logic of the cable sample is expressed as:

[0013] ;

[0014] In the formula: is the safety performance value of cable sample a; is the size of the grayscale image of the image data of cable sample a; is the size of the image data of cable sample a; is the set of the remaining areas segmented from the image data of cable sample a based on the included grayscale image; is the distance between the i-th group of areas and the (i + 1)-th group of areas; is the size of the largest closed figure formed by connecting the centers of each group of areas in the set;

[0015] Among them, The larger it is, the better the safety of cable sample a is. On the contrary, it means the worse the safety of cable sample a is;

[0016] Set the safety judgment threshold for cable samples. By comparing the safety evaluation results of cable samples with the safety judgment threshold for cable samples, identify the safety ratio of cable samples, and determine whether the cable samples from the production batch of the cable source are qualified according to the safety ratio of cable samples.

[0017] Furthermore, the sampling ratio is , where x is the length of the cables produced in the same batch, y is the number of cable samples taken, and the length of each group of cable samples is 1 - 2m;

[0018] The inspection equipment includes a panel. The side of the panel is a rounded equilateral triangle. Three sets of driving wheels are connected to the side of the panel through bearings. The three sets of driving wheels are distributed in a triangular shape, and the distances from the center points of the end faces of the three sets of driving wheels to the center point of the side of the panel are equal. A number of refrigeration plates are equidistantly installed on the side of the panel, and the number of refrigeration plates is arranged equidistantly on the surface of the panel. One set of driving wheels on the side where the refrigeration plate is installed fixedly winds a cable sample. One end of the cable sample far from the driving wheel fixedly winding the cable sample is fixedly connected to the surface of the driving wheel far from the refrigeration plate. The cable sample is in contact with the surface of another set of driving wheels. A camera is installed on the surface of the panel, and the imaging end of the camera faces the surface of the cable sample.

[0019] Furthermore, the driving wheels are controlled by a servo motor to rotate and transmit the cable sample. The refrigeration plates operate synchronously for refrigeration and transfer the refrigeration effect to the cable sample with air as the medium. The cable sample is unreeled, transmitted, and wound by the driving wheels, and during the processes of unreeling, transmitting, and winding, the image data of the cable sample is collected by the camera.

[0020] The rotation directions of the three sets of driving wheels are the same. The three sets of driving wheels are respectively used for unreeling, transmitting, and winding the cable sample. The camera is deployed on the side of the driving wheel for transmitting the cable sample. The refrigeration temperatures of the number of equidistantly arranged refrigeration plates gradually decrease based on the transmission direction of the cable sample. The refrigeration temperatures of the number of equidistantly arranged refrigeration plates are , where b is the lowest temperature of the cable installation environment;

[0021] Among them, a humidity sensor is installed inside the camera. The humidity sensor real-time monitors the environmental humidity in the area where the inspection equipment is located. When the humidity is not greater than 20%, the inspection equipment operates. The cable sample is unreeled, transmitted, and wound by the inspection equipment, and at the same time, the image data of the cable sample is collected based on the camera.

[0022] Furthermore, the image acquisition logic of the cable sample is as follows:

[0023] Logic1: Set a set of digital collections, which are composed of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 in the digital collection;

[0024] Logic2: Obtain the running timestamp of the inspection equipment and the diameter of the driving wheel, calculate the time required for the cable sample to unwind and rewind, obtain the end timestamp of the inspection equipment, and form a set of numbers based on the running timestamp and the end timestamp of the inspection equipment. Delete the duplicate items in the set.

[0025] Logic3: Identify the intersection of the set in Logic1 and the set in Logic2.

[0026] Logic4: Determine a set of time thresholds based on the end timestamp and the running timestamp of the inspection equipment. Calculate the ratio of each item in the intersection in Logic3 to the sum of all items in the intersection, and multiply each calculated ratio by the corresponding duration of the determined time threshold to obtain the product results.

[0027] Logic5: Add each group of product results to the running timestamp of the inspection equipment to obtain the running timestamp of the camera, and control the camera to continuously run based on the running timestamp of the camera to collect cable sample image data.

[0028] Furthermore, the end timestamp of the inspection equipment in Logic2 is obtained through the following formula:

[0029] ;

[0030] In the formula: is the end timestamp of the inspection equipment; is the running timestamp of the inspection equipment; is the length of the cable sample; is the diameter of the driving wheel; is the rotational speed of the driving wheel;

[0031] Wherein, the value of is taken as an integer by truncation, When adding and in the formula, it is in base 60.

[0032] Furthermore, during the execution of the safety assessment phase of the cable sample, when the value of is 1, the safety assessment logic of the cable sample ends, and the cable sample is determined to be qualified. when the value of is not 1, execute the safety assessment logic of the cable sample. When the number of regions in the set is 1, takes the value of 0, that is, the size of the only region included in the set

[0033] Furthermore, the identification logic of the safety ratio of the cable sample is expressed as:

[0034] ;

[0035] In the formula: is the safety ratio of the cable sample; is the number of cable samples identified as qualified; is the total value of the safety performance of the cable sample; is the safety performance value of the cable sample corresponding to the result of the v-th group;

[0036] Among them, the safety ratio of the cable sample The larger it is, the greater the qualified probability of the cables in the production batch from which the cable sample is sourced. Conversely, the smaller it is, the smaller the qualified probability of the cables in the production batch from which the cable sample is sourced.

[0037] Furthermore, the represents a decision function, , represents the safety determination threshold of the cable sample, = 1, otherwise, = 0.

[0038] Furthermore, the user sets a qualified determination value. Based on the comparison between the qualified determination value and the safety ratio of the cable sample , if the safety ratio of the cable sample is not less than the qualified determination value, it is determined that the cables in the production batch from which the cable sample is sourced are qualified. Otherwise, it is determined that the cables in the production batch from which the cable sample is sourced are unqualified.

[0039] Furthermore, when the determination result of the cables in the production batch from which the cable sample is sourced is unqualified, and the safety ratio of the cable sample ≥ , is the qualified determination value, a general inspection is carried out on the cables in the production batch from which the cable sample is sourced;

[0040] During the general inspection stage of the cables in the production batch from which the cable sample is sourced, the general inspection order is determined based on the distance between the cables in the production batch and the sampling position of the cable sample, so that the cables in the production batch far from the cable sample are preferentially received by the inspection equipment and the safety assessment is carried out.

[0041] Adopting the technical solution provided by the present invention, compared with the known public technology, it has the following beneficial effects:

[0042] The present invention provides an inspection process for an environmentally friendly, cold-resistant and flame-retardant power cable. During the implementation of this process, through specific inspection equipment, the state presented by the cable surface sheath when the environmentally friendly, cold-resistant and flame-retardant power cable is stressed in a cold state is simulated. Further, based on the acquisition of cable sheath image data, a safety assessment of the cable is carried out, and finally a qualified determination of the cable is achieved, ensuring that the quality of the produced cable is guaranteed, so as to ensure that the inspection and maintenance requirements after the cable is put into use are lower.

[0043] At the same time, a specific sample acquisition logic is configured for the cable sheath image data acquisition logic, so that the data applied in the safety assessment stage of the cable can better reflect the defect characteristics of the cables produced in the same batch, making the evaluation and determination results finally output by this process more representative for the cables produced in the same batch. Brief Description of the Drawings

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0045] Figure 1 It is a schematic flow chart of an inspection process for an environmentally friendly, cold-resistant and flame-retardant power cable;

[0046] Figure 2 It is a schematic three-dimensional structure diagram of the inspection equipment in the present invention;

[0047] Figure 3 It is a schematic side view structure diagram of the inspection equipment in the present invention;

[0048] Figure 4 It is a schematic diagram of the process of restoring the converted grayscale image to the segmentation position in the cable sample image data in the present invention;

[0049] The reference numerals in the figure respectively represent: 1, panel; 2, driving wheel; 3, cable sample; 4, camera; 5, refrigeration plate. Detailed Embodiments

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0051] The present invention will be further described below in conjunction with embodiments. Embodiment

[0052] The inspection process of an environmentally friendly, cold-resistant and flame-retardant power cable in this embodiment is as Figure 1 shown and includes:

[0053] Set the sampling ratio, sample the cables produced in the same batch based on the sampling ratio to obtain cable samples;

[0054] The sampling ratio is , where x is the length of the cables produced in the same batch, y is the number of cable samples taken, and the length of each group of cable samples is 1 - 2m;

[0055] Load the cable samples onto the inspection equipment, control the operation of the inspection equipment to transmit the cable samples, configure the cable sample image acquisition logic, and during the transmission of the cable samples on the inspection equipment, collect the cable sample image data based on the cable sample image acquisition logic;

[0056] The inspection equipment includes a panel. The side surface of the panel is a rounded equilateral triangle. Three driving wheels are connected to the side surface of the panel through bearings. The three driving wheels are distributed in a triangular shape, and the center points of the end faces of the three driving wheels are equidistant from the center point of the side surface of the panel. A number of refrigeration plates are equidistantly installed on the side surface of the panel, and the number of refrigeration plates is arranged equidistantly on the panel surface. One of the driving wheels on the side where the refrigeration plates are installed fixedly winds up a cable sample. One end of the cable sample far from the driving wheel fixedly winding up the cable sample is fixedly connected to the surface of the driving wheel far from the refrigeration plates. The cable sample is in contact with the surface of another driving wheel. A camera is installed on the surface of the panel, and the imaging end of the camera faces the surface of the cable sample;

[0057] The driving wheels are controlled by a servo motor to rotate and transmit the cable samples. The refrigeration plates operate synchronously for refrigeration and transfer the refrigeration effect to the cable samples with air as the medium. The cable samples are unwound, transmitted, and wound up by the driving wheels, and during the unwinding, transmission, and winding-up processes, the cable sample image data is collected by the camera;

[0058] The rotation directions of the three driving wheels are the same. The three driving wheels are respectively used for unwinding, transmitting, and winding up the cable samples. The camera is deployed on the side of the driving wheel used for transmitting the cable samples. The refrigeration temperatures of the number of equidistantly arranged refrigeration plates gradually decrease based on the cable sample transmission direction. The refrigeration temperatures of the number of equidistantly arranged refrigeration plates are , where b is the lowest temperature of the cable installation environment;

[0059] Among them, a humidity sensor is installed inside the camera. The humidity sensor monitors the environmental humidity of the area where the inspection device is located in real time. When the humidity is no more than 20%, the inspection device operates, and the cable sample is unrolled, transmitted, and rewound by the inspection device. Meanwhile, image data of the cable sample is collected based on the camera.

[0060] Obtain the image data of the cable sample, pick up the pixels representing the cable sheath in the image data of the cable sample, based on the pixel values of the picked-up pixels, capture the pixels with the same pixel values as the picked-up pixels in the image data of the cable sample, determine the cable sheath area image in the image data of the cable sample through the captured pixels, segment the cable sheath area image from the image data of the cable sample, convert the segmented cable sheath area image into a grayscale image. After the cable sheath area image is converted into a grayscale image, restore the grayscale image to the segmentation position in the image data of the cable sample, and evaluate the safety of the cable sample by applying the image data of the cable sample with the grayscale image.

[0061] The safety evaluation logic of the cable sample is expressed as:

[0062] ;

[0063] In the formula: is the safety performance value of cable sample a; is the size of the grayscale image of the image data of cable sample a; is the size of the image data of cable sample a; is the set of the remaining areas obtained by segmenting the image data of cable sample a based on the included grayscale image; is the distance between the i-th group of areas and the (i + 1)-th group of areas; is the size of the largest closed figure formed by connecting the centers of each group of areas in the set;

[0064] Among them, The larger it is, the better the safety of cable sample a is. On the contrary, it means the worse the safety of cable sample a is;

[0065] During the safety evaluation stage of the cable sample, When the value of is 1, the safety evaluation logic of the cable sample ends, and the cable sample is determined to be qualified. When the value of is not 1, execute the safety evaluation logic of the cable sample. When the number of areas in the set is 1, takes the value of 0, that is, the size of the only area included in the set ;

[0066] Set the cable sample safety determination threshold, compare the cable sample safety assessment results with the cable sample safety determination threshold, identify the cable sample safety ratio, and determine whether the cables from the production batch of the cable sample source are qualified based on the cable sample safety ratio;

[0067] The identification logic of cable sample safety ratio is expressed as:

[0068] ;

[0069] Where: is the cable sample safety ratio; is the number of cable samples that were deemed qualified; Obtain the total amount for the safety performance value of the cable samples; Obtain the cable sample safety performance value corresponding to the result for group v;

[0070] Among them, the cable sample safety ratio The larger the value is, the greater the probability that the cable sample comes from the production batch that is qualified. Conversely, the smaller the value is, the smaller the probability that the cable sample comes from the production batch that is qualified.

[0071] represents the decision function, , represents the cable sample safety determination threshold, =1, otherwise, =0;

[0072] The user sets the qualified judgment value based on the qualified judgment value and the safety ratio of the cable sample Comparison, cable sample safety ratio If the value is not less than the qualified judgment value, the cables from the production batch from which the cable sample comes are judged to be qualified; otherwise, the cables from the production batch from which the cable sample comes are judged to be unqualified.

[0073] In this embodiment, through the process logic in the above embodiment, sampling, scene simulation and cable image acquisition analysis, evaluation and judgment are used to bring about cold resistance detection effect for cables produced in the same batch, ensuring that the cables are effectively quality controlled before being put into use after production, thereby reducing the need for later inspection and maintenance of the cables.

[0074] See also Figure 2 and Figure 3 As shown, the specific results and operation modes of the inspection equipment are limited in combination with the records in the above embodiments to ensure that the cable sample image data is stably collected based on specific conditions;

[0075] See also Figure 4As shown in the figure, the drawing sheets in the figure are marked as (1), (2), (3), and (4). Drawing sheet (1) represents the cable sample image data. Drawing sheet (2) represents the grayscale image obtained after the cable sheath area image obtained by segmentation is converted. Drawing sheet (3) represents the set of remaining areas obtained by segmenting the grayscale image contained in the cable sample image data. Drawing sheet (4) is the combination of drawing sheet (3) and drawing sheet (2), that is, after the converted grayscale image is restored to the cable sample image data, the presented cable sample image data. Embodiment

[0076] The cable sample image acquisition logic is as follows:

[0077] Logic1: Set a set of digital collections, which are composed of 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9 in the digital collection;

[0078] Logic2: Obtain the running timestamp of the inspection equipment and the diameter of the driving wheel, calculate the time required for the cable sample to unwind and wind up, obtain the end timestamp of the inspection equipment, and form a set of numbers based on the running timestamp of the inspection equipment and the end timestamp of the inspection equipment, and delete the duplicate items in the set;

[0079] Logic3: Identify the intersection of the set in Logic1 and the set in Logic2;

[0080] Logic4: Determine a set of time thresholds with the end timestamp of the inspection equipment and the running timestamp of the inspection equipment, calculate the ratio of each item in the intersection in Logic3 to the sum of each item in the intersection, and multiply each calculated ratio by the corresponding duration of the determined time threshold to obtain the product result;

[0081] Logic5: Add each group of product results to the running timestamp of the inspection equipment respectively to obtain the running timestamp of the camera, and control the camera to continuously run based on the running timestamp of the camera to collect cable sample image data;

[0082] The end timestamp of the inspection equipment in Logic2 is obtained through the following formula:

[0083] ;

[0084] In the formula: is the end timestamp of the inspection equipment; is the running timestamp of the inspection equipment; is the length of the cable sample; is the diameter of the driving wheel; is the rotational speed of the driving wheel;

[0085] Among them, The value of is taken as an integer by the truncation method, and When adding in the formula, it is in base 60.

[0086] In this embodiment, through the above cable sample image acquisition logic, the acquisition logic of the camera on the inspection device when acquiring cable image data is further defined. Embodiment

[0087] At the specific implementation level, on the basis of Embodiment 1, this embodiment refers to Figure 1 To further specifically describe the inspection process of an environmentally friendly, cold-resistant and flame-retardant power cable in Embodiment 1:

[0088] When the cable of the production batch from which the cable sample is sourced is judged to be unqualified, the safety ratio of the cable sample ≥ , is the qualified judgment value, then a general survey is carried out on the cables of the production batch from which the cable sample is sourced;

[0089] In the stage of general survey of the cables of the production batch from which the cable sample is sourced, the general survey order is determined based on the distance between the cables in the production batch and the sampling position of the cable sample, so that the cables in the production batch far from the cable sample are preferentially received by the inspection device and the safety assessment is performed.

[0090] Through the above settings, as a further expansion of the process in Embodiment 1, its purpose is to assist cable production users in more efficiently finding qualified cables among the cables of the same production batch that are judged to be unqualified.

[0091] In summary, during the execution of the process in the above embodiment, by using a specific inspection device to simulate the state presented by the cable surface sheath when an environmentally friendly, cold-resistant and flame-retardant power cable is stressed in a cold state, and further based on the acquisition of cable sheath image data, a safety assessment of the cable is carried out, and finally the cable is judged to be qualified, ensuring that the quality of the produced cable is guaranteed, so as to ensure lower inspection and maintenance requirements after the cable is put into use. At the same time, with a specific sample acquisition logic and cable sheath image data acquisition logic configured, the data used in the safety assessment stage of the cable can better reflect the defect characteristics of the cables produced in the same batch, making the evaluation and judgment results finally output by this process more representative for the cables produced in the same batch.

[0092] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An inspection process for environmentally friendly cold-resistant and flame-retardant power cables, characterized in that: include: Set a sampling ratio, sample cables produced in the same batch based on the sampling ratio, and obtain cable samples; Loading the cable sample on the inspection device, controlling the operation of the inspection device, transmitting the cable sample, configuring the cable sample image acquisition logic, and collecting the cable sample image data based on the cable sample image acquisition logic during the transmission of the cable sample on the inspection device; Acquire cable sample image data, pick up pixels representing cable sheaths in the cable sample image data, capture pixels having the same pixel value as the picked up pixels in the cable sample image data based on the pixel values ​​of the picked up pixels, determine a cable sheath area image in the cable sample image data through the captured pixels, segment the cable sheath area image from the cable sample image data, convert the segmented cable sheath area image into a grayscale image, restore the grayscale image to the segmented position in the cable sample image data after the cable sheath area image is converted into a grayscale image, and use the cable sample image data with the grayscale image to evaluate the safety of the cable sample; The cable sample safety assessment logic is expressed as: ； Where: is the safety performance value of cable sample a; is the grayscale image size of the image data of cable sample a; is the size of the image data of cable sample a; is a set of remaining regions obtained by segmenting the image data of the cable sample a based on the included grayscale image; is the distance between the i-th group of regions and the i+1-th group of regions; The size of the largest closed figure formed by connecting the centers of each group of regions in the set; in, The larger the value, the better the safety of cable sample a. Conversely, the smaller the value, the worse the safety of cable sample a. Set the cable sample safety determination threshold, compare the cable sample safety assessment results with the cable sample safety determination threshold, identify the cable sample safety ratio, and determine whether the cables from the production batch of the cable sample source are qualified based on the cable sample safety ratio; The inspection equipment comprises a panel, the side of the panel is an equilateral triangle with rounded corners, three groups of transmission wheels are connected to the side of the panel through bearings, the three groups of transmission wheels are distributed in a triangular shape, and the axis points of the end faces of the three groups of transmission wheels are equidistant from the center point of the side of the panel, a plurality of groups of refrigeration plates are equidistantly installed on the side of the panel, and the plurality of groups of refrigeration plates are equidistantly arranged on the surface of the panel, a group of transmission wheels on the installation side of the refrigeration plate is fixedly wound with a cable sample, one end of the cable sample away from the transmission wheel fixedly wound with the cable sample is fixedly connected to the surface of the transmission wheel away from the refrigeration plate, and the cable sample is attached to the surface of another group of transmission wheels, a camera is installed on the surface of the panel, and the camera end of the camera is relative to the surface of the cable sample; The cable sample image acquisition logic is: Logic1: Set a set of numbers, which consists of 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9; Logic2: Get the running timestamp of the inspection equipment and the diameter of the transmission wheel, calculate the time required for the cable sample to be unwound and rewound, obtain the end timestamp of the inspection equipment, and use the numbers composed of the running timestamp of the inspection equipment and the end timestamp of the inspection equipment as a set, and delete the duplicate items in the set; Logic3: Identify the intersection of the set in Logic1 and the set in Logic2; Logic4: Determine a set of time thresholds using the inspection equipment end timestamp and the inspection equipment operation timestamp, calculate the ratio of each item in the intersection in Logic3 to the sum of each item in the intersection, and multiply each calculated ratio by the duration corresponding to the determined time threshold to obtain the product result; Logic5: Add the product results of each group to the running timestamp of the inspection equipment to obtain the camera running timestamp, control the camera to run continuously based on the camera running timestamp, and collect the cable sample image data.

2. The inspection process of an environmentally friendly cold-resistant and flame-retardant power cable according to claim 1 is characterized in that: The sampling ratio is , x is the length of cables produced in the same batch, y is the number of cable samples taken, and the length of each group of cable samples is 1~2m.

3. The inspection process of an environmentally friendly cold-resistant and flame-retardant power cable according to claim 2 is characterized in that: The transmission wheel is controlled by a servo motor to rotate and transmit the cable sample, and the refrigeration plate operates synchronously for refrigeration, and transmits the refrigeration effect to the cable sample using air as a medium. The cable sample is unwound, transmitted, and rewound by the transmission wheel, and during the unwound, transmitted, and rewound process, the cable sample image data is collected by a camera; The three groups of transmission wheels rotate in the same direction. The three groups of transmission wheels are used for unwinding, transmitting and rewinding cable samples respectively. The camera is deployed on the side of the transmission wheel used for transmitting the cable sample. The cooling temperature of several groups of equidistantly arranged cooling plates gradually decreases based on the transmission direction of the cable sample. The cooling temperature of several groups of equidistantly arranged cooling plates is , b is the minimum temperature of the cable installation environment; Among them, a humidity sensor is installed inside the camera. The humidity sensor monitors the ambient humidity in the area where the inspection equipment is located in real time. When the humidity is not more than 20%, the inspection equipment is running, and the cable samples are unrolled, transmitted, and reeled by the inspection equipment, and the cable sample image data is collected based on the camera simultaneously.

4. The inspection process of an environmentally friendly cold-resistant and flame-retardant power cable according to claim 3 is characterized in that: The end timestamp of the inspection device in Logic2 is obtained by the following formula: ； Where: End timestamp for testing equipment; To verify the equipment operation time stamp; is the cable sample length; is the transmission wheel diameter; is the transmission wheel speed; in, The value of is rounded to an integer. and When added together in the formula, it is base 60.

5. The inspection process of an environmentally friendly cold-resistant and flame-retardant power cable according to claim 1 is characterized in that: During the safety assessment phase of the cable samples, When the value of is 1, the cable sample safety assessment logic ends and the cable sample is deemed qualified. When the value is not 1, the cable sample safety assessment logic is executed, and the collection When the number of regions is 1, The value is 0. That is, collection The size of the unique region contained in .

6. The inspection process of an environmentally friendly cold-resistant and flame-retardant power cable according to claim 1 is characterized in that: The identification logic of the cable sample safety ratio is expressed as: ； Where: is the cable sample safety ratio; is the number of cable samples that were deemed qualified; Obtain the total amount for the safety performance value of the cable samples; Obtain the cable sample safety performance value corresponding to the result for group v; Among them, the cable sample safety ratio The larger the value is, the greater the probability that the cables from the production batch the cable sample comes from is qualified. Conversely, the smaller the probability that the cables from the production batch the cable sample comes from is qualified.

7. The inspection process of an environmentally friendly cold-resistant and flame-retardant power cable according to claim 6 is characterized in that: Said represents the decision function, , represents the cable sample safety determination threshold, =1, otherwise, =0.

8. The inspection process of an environmentally friendly cold-resistant and flame-retardant power cable according to claim 1 or 6, characterized in that: The user sets the qualified judgment value based on the qualified judgment value and the safety ratio of the cable sample Comparison, cable sample safety ratio If the value is not less than the qualified judgment value, the cables from the production batch from which the cable sample comes are judged to be qualified; otherwise, the cables from the production batch from which the cable sample comes are judged to be unqualified.

9. The inspection process of an environmentally friendly cold-resistant and flame-retardant power cable according to claim 8, characterized in that: When the cable sample is from a production batch and the result is judged as unqualified, the safety ratio of the cable sample ≥ , If it is a qualified judgment value, a census of the cables in the production batch from which the cable samples are sourced will be conducted; During the survey stage of cables from the production batch from which the cable samples were obtained, the survey order is determined based on the distance between the cables in the production batch and the cable sample sampling location, so that cables in the production batch far away from the cable samples are preferentially received by the inspection equipment and safety assessment is performed.

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