A method for identifying cables in substations

Abstract

The present invention discloses a substation cable identification method, which belongs to the technical field of cable line checking, and includes the following steps: using an ultrasonic detector to detect and transmit data around the end of the cable; marking the detection order; comparing and analyzing the terminal data to pair the cables; removing the cables, and using radiographic flaw detection to perform radiographic flaw detection on both ends of the paired cables to confirm whether the cables match. Pre-detection can be better achieved through the sonic detection of the sonic detector, because the texture structure of each batch of cables is inconsistent and the similarity is extremely low, so the initial identification and pre-inspection can be completed by comparing the internal texture through sonic detection, reducing the workload of the later inspection, so that the later inspection is for the purpose of confirmation, and greatly increasing the accuracy of the inspection; and because it is through comparing the internal structure of the cable, it does not need to stop running, saving the time of disconnecting the wires, and improving work efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of cable tracing and relates to a substation cable identification method. Background Art

[0002] At present, many secondary cable detection devices use offline detection methods, which often require the secondary cable line to be powered off first, and then connected to the secondary cable detection device for detection and identification. This detection method requires power outage detection, which affects the operation of the entire line, is time-consuming and labor-intensive, and is difficult to achieve high-frequency detection.

[0003] Because the internal structure of each batch of cables is inconsistent, secondary identification of the cables can be achieved by comparing their internal structures. Conventional methods for detecting the internal structure of objects include X-ray detection, sound wave detection, etc. However, these two detection methods are used on fixed objects. The problem with using them in the field of power line identification technology is that there is too much comparison data and the collection method is difficult. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a substation cable identification method in view of the above-mentioned deficiencies in the prior art. The substation cable identification method is to solve the above-mentioned technical problem. The present invention provides the following technical solutions: A substation cable identification method comprises the following steps:

[0005] S1: Use an ultrasonic detector to detect the end of the cable, and the results of the ultrasonic detector are transmitted to the terminal in real time;

[0006] S2: Mark the ends of the detected cables in the order of detection;

[0007] S3: Compare and analyze the terminal data, and pair the cable ends of the cable lines that match the detection results according to the comparison results;

[0008] S4: Remove the cables and use radiographic flaw detection to inspect both ends of the paired cables to confirm whether the cables match;

[0009] The S3 comparison analysis adopts the following steps:

[0010] S3.1: Compare the peaks and valleys of the test results. If the error between different groups of data is less than 0.5%, proceed to step S3.2;

[0011] S3.2: Compare the cycle intervals of the test results. If the cycle intervals are consistent, proceed to step S3.3;

[0012] S3.3: Conduct a comprehensive comparison of peaks and troughs in more than ten consecutive periods;

[0013] If the test results have a similarity of more than 95% for two sets of data, the results are defined as consistent, and the cables are paired according to the cable end marks;

[0014] If there are more than two test results with a similarity of more than 95%, five comparison cycles are added and compared again until two sets of test results with a similarity of more than 95% are obtained.

[0015] Preferably, the model of the ultrasonic detector is TSUT-350 or RJUT510.

[0016] Preferably, the terminal includes a mobile terminal and a cloud server.

[0017] Preferably, the marking is performed by spraying.

[0018] Preferably, after the mark mark is sprayed, the mark mark is dried and a waterproof layer is sprayed.

[0019] An ultrasonic detector installation device, the ultrasonic detector uses a clamp for surrounding detection, the clamp is clamped at the end of the cable to be detected, the clamp is provided with an annular positioning groove, two motors are installed on the clamp, an insulating wire is wound around the rotating shaft of the motor, a sliding positioning block is slidably installed in the annular positioning groove, the ultrasonic detector is installed on the sliding positioning block, and the two ends of the ultrasonic detector are respectively connected to two insulating wires.

[0020] Beneficial effect: The ultrasonic detection of the ultrasonic detector can better realize the pre-detection. Because the texture structure of each batch of cables is inconsistent and the similarity is very low, the initial identification and pre-inspection can be completed by comparing the internal texture through ultrasonic detection, which reduces the workload of the later inspection and makes the later inspection for the purpose of confirmation, greatly increasing the accuracy of the inspection; and because it is through comparing the internal structure of the cable, there is no need to stop the operation, saving the time of disassembling the wiring and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the assembly of the clamp and the cable;

[0022] Figure 2 This is an example diagram of ultrasonic detection results;

[0023] Figure 3 Schematic diagram of detection in different directions;

[0024] Figure 4 is a wave curve mapping diagram;

[0025] Figure 5 It is the mapping diagram of the wave curve after the inversion;

[0026] Figure 6 This is one of the fitting schematic diagrams;

[0027] Figure 7 This is the second fitting schematic diagram;

[0028] Explanation of symbols in the figure: 1: cable; 2: clamp; 3: annular positioning groove; 4: motor; 5: sliding positioning block. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.

[0030] In the description of the present invention, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. "First", "second" and the like do not indicate the importance of the components, and therefore cannot be understood as limiting the present invention. The specific dimensions used in this embodiment are only for illustrating the technical solution, and do not limit the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] The present invention provides a technical solution, a substation cable identification method, comprising the following steps:

[0033] S1: Use an ultrasonic detector to detect the end of the cable, and the results of the ultrasonic detector are transmitted to the terminal in real time;

[0034] S2: Mark the ends of the detected cables in the order of detection;

[0035] S3: Compare and analyze the terminal data, and pair the cable ends of the cable lines that match the detection results according to the comparison results;

[0036] S4: Remove the cables and use radiographic flaw detection to inspect both ends of the paired cables to confirm whether the cables match;

[0037] S3 comparison analysis uses the following steps:

[0038] S3.1: Compare the peaks and valleys of the test results. If the error between different groups of data is less than 0.5%, proceed to step S3.2;

[0039] S3.2: Compare the cycle intervals of the test results. If the cycle intervals are consistent, proceed to step S3.3;

[0040] S3.3: Conduct a comprehensive comparison of peaks and troughs in more than ten consecutive periods;

[0041] If the test results have a similarity of more than 95% for two sets of data, the results are defined as consistent, and the cables are paired according to the cable end marks;

[0042] If there are more than two test results with a similarity of more than 95%, five comparison cycles are added and compared again until two sets of test results with a similarity of more than 95% are obtained.

[0043] Furthermore, the model of the ultrasonic detector is TSUT-350 or RJUT510.

[0044] Furthermore, the terminal includes a mobile terminal and a cloud server.

[0045] Furthermore, the marking is performed by spraying.

[0046] Furthermore, after the marking mark is sprayed, the marking mark is dried and a waterproof layer is sprayed.

[0047] Embodiment 2:

[0048] refer to Figure 1 The present invention provides a technical solution, an ultrasonic detector installation device for a substation cable identification method, the ultrasonic detector adopts a clamp 2 for surrounding detection, the clamp 2 is clamped at the end of the cable 1 to be detected, an annular positioning groove 3 is provided on the clamp 2, two motors 4 are installed on the clamp 2, an insulating wire is wound on the rotating shaft of the motor 4, a sliding positioning block 5 is slidably installed in the annular positioning groove 3, the ultrasonic detector is installed on the sliding positioning block 5, and both ends of the ultrasonic detector are respectively connected to the two insulating wires.

[0049] A clamp 2 is clamped at one end of the cable 1 to be tested, and a sliding positioning block 5 is used to slide the ultrasonic detector onto the clamp 2. Two motors 4 are installed on the clamp 2. Insulated wires are wound around the rotating shafts of the two motors 4. The two insulating wires are respectively connected to two opposite ends of the ultrasonic detector. When the ultrasonic detector is running, one of them is in a defense state and the other is in a reeling state, so that the ultrasonic detector is always in a tightly positioned state to avoid jitter / displacement during detection, resulting in incomplete / repeated detection results, and other problems.

[0050] Embodiment 3:

[0051] refer to Figure 1-7On the basis of Examples 1 and 2, an ultrasonic detector is used to rotate and detect one end of the cable and mark the detection order for the detected cable until all the cable ends are detected. The cable detected for the first time is marked with the number A1, the second detection is marked with A2, and so on. The ultrasonic detector is used to rotate around one end of the cable for detection once because the detection results are inconsistent due to inconsistent angles, so a continuous detection result can be obtained by rotating around for a circle, which is convenient for subsequent work. The marked numbers can be sprayed, and the numbers need to be dried and sprayed with a waterproof layer after spraying to prevent the marked numbers from being washed away;

[0052] The ultrasonic detection result example is shown in the figure Figure 2 As shown, the ultrasonic detector detects the first shielding layer of the cable wire, analyzes the data fluctuations to generate a detection distance curve, then detects the second shielding layer, analyzes the data fluctuations to generate a detection distance curve, and then this distance curve to the core material resolves the frequency cycle in batches.

[0053] The results of the ultrasonic detector are transmitted to the mobile control terminal in real time, and uploaded to the cloud server through the mobile control terminal for comparison and analysis; the details of all data are mainly compared, and the cables are paired according to the similarity of the detection results. Because it uses markings during detection, it is only necessary to pair the marked numbers in pairs; according to the comparison results, the corresponding wire ends are found and re-detected by the detection equipment to see if they are matching cables. The detection equipment and detection method are as follows: remove the cable, and use the radiographic flaw detection method to perform radiographic flaw detection on both ends of the matched cable, and further match the internal structure of the cable. When comparing, because the cloud receives the detection results in real time, the comparison is also carried out in real time, which saves time.

[0054] The comparison is based on the following process: the peaks and troughs of the detection results are detected, and the peaks and troughs are compared first. The detection results with consistent peaks and troughs enter the next comparison process; that is, when the maximum and minimum values ​​are consistent, the error is less than 0.5% and is considered consistent; the cycle intervals are compared, and the detection results with consistent cycle intervals enter the next comparison process; the cycle interval refers to the time difference between the focus of the previous wave passing through the x-axis and the focus of the adjacent wave passing through the x-axis, and in the present invention, the period of a sine wave is 0.01 seconds, but because the data of each layer of material between the multi-layer materials is different, the middle position of a sine wave is different from the focal position of the x-axis, that is, there is a difference in the echo time, and a comprehensive comparison is performed to compare the values ​​of the peak and trough similarity of more than 95% within a period (taking more than ten consecutive periods). If the detection results with a similarity of more than 95% exceed two, five comparison cycles are added for comparison again; if not exceeded, the two sets of data are defined as data with consistent results, and the two sets of data originate from the same cable.

[0055] The detection result is that the original wave pattern needs to be processed to Figure 3 For example, the wave detection position is different. For example, the direction from upper right to lower left is the first type, the direction from lower right to upper left is the second type, and the direction from lower to upper is the third type. The wave curve mapping diagram obtained is as follows Figure 4 and Figure 5 As shown in the figure, because the wave detection positions are different, the number of layers penetrated is different, and the mapping nodes are different, the waveform data can be divided into two when comparing, one is the number of reaction points, and the other is the highest point value. Because of the waveform fitting problem, the highest point value is not the diameter value, and is generally higher than the diameter value, such as Figure 4 and Figure 5 As shown, when comparing, the waveform of each cycle is fitted by a computer. When one of the two results is completely fitted, the fitted waveform is used as the first starting point to start comparing the results, such as Figure 4 The first and third waveforms shown are fitted, so the computer uses the first waveform as the starting fitting diagram for comparison. When it is found that the waveform of the first case fits the waveform of the second case;

[0056] Then reverse the waveform curve in the figure below, see Figure 5 , use the new first waveform to compare with the new second waveform, the new second waveform to the new third waveform, and the new third waveform to the new first waveform. If there is no complete fitting result, start with the new first waveform, use the new first waveform to compare the new first waveform, the new second waveform, and the new third waveform. Based on the length of the waveform, calculate how much length the new first waveform and the new second waveform can fit together at most, and mark it as the degree of fit. The fitting method is to fit based on the starting point of the wave: Figure 6 and Figure 7 For example, Figure 7 The left curve in is the fitting. Figure 6 There is no fit in the waveform, so the waveform is not fitted.

[0057] Embodiment 4:

[0058] On the basis of embodiments 1 and 2, for example, if there are 256 wires in the control cabinet, there are 512 wire ends, and 512 detection results can be obtained by detecting in sequence. The corresponding wire ends are marked with numbers 1-512 in sequence, and the peaks and troughs in the corresponding 512 detection results can all get specific values; the comparative analysis structure, for example, the results of one drawing are 4-18, 4.2-18, 4.1-17.9, 4-17.9, 3.8-18, and the results of another drawing are 4-17.9, 3.8-18, 4-18, 4.2-18, 4.1-17.9, then when comparing, it is determined that the numbers corresponding to the two groups of drawings are the same cable, and the values ​​of the first two cycles are moved to the end so that the drawings fluctuate consistently. When the judgment is completed, each group of cables is installed After the test is carried out and it is determined to be correct, the next set of cables will be tested, compared and installed, and so on. After all the judgments are completed, there will be a certain amount of mismatched numbers due to machine accuracy. For example, there are still 30 result drawings that are not matched successfully. Then match the drawings of these 30 results and calculate the continuous cycle. For example, the detection cycle is 100, and there are 95 continuous cycles in 10 drawings that are consistent, and there are 5 continuous cycles with errors. Then the results in the ten drawings are judged to be consistent results, that is, 5 groups of cables are matched successfully. The five groups of cables are connected in sequence according to the numbers and tested. If one group of cables fails to match, it is judged that the two results are inconsistent and it is put into the saved 20 results for rematching. The matching result cycle results of the 30 drawings are ranked according to the consistency, as shown in Table 1.

[0059] Table 1 Matching results table

[0060] Corresponding number Continuous consistent cycle Corresponding number Continuous consistent cycle Corresponding number Continuous consistent cycle 1-30 98 2-29 98 3-27 98 4-26 98 5-25 98 6-24 98 7-23 98 8-22 97 9-21 96

[0061] Sort by analogy, and then connect in sequence according to the sorting order. If the cables corresponding to the two drawings 2 and 29 pass the installation test, put the result back into the database for matching. After all are completed, for example, there are still three groups of results 2-29 / 9-21 and 15-16 that fail, then re-match and re-sort the six results for testing.

[0062] Although the content of the present invention has been described in detail through the above preferred embodiments, it should be appreciated that the above description should not be considered as a limitation of the present invention. After reading the above content, it will be obvious to those skilled in the art for various modifications and substitutions of the present invention. Within the scope of the technical concept of the present invention, various equivalent transformations can be performed on the technical solution of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A substation cable identification method, characterized in that: The following steps are included: S1: Use an ultrasonic detector to detect the end of the cable, and the results of the ultrasonic detector are transmitted to the terminal in real time; S2: Mark the ends of the detected cables in the order of detection; S3: Compare and analyze the terminal data, and pair the cable ends of the cable lines that match the detection results according to the comparison results; S4: Remove the cables and use radiographic flaw detection to inspect both ends of the paired cables to confirm whether the cables match; The S3 comparison analysis adopts the following steps: S3.1: Compare the peaks and valleys of the test results. If the error between different groups of data is less than 0.5%, proceed to step S3.2; S3.2: Compare the cycle intervals of the test results. If the cycle intervals are consistent, proceed to step S3.3; S3.3: Conduct a comprehensive comparison of peaks and troughs in more than ten consecutive periods; If the test results have a similarity of more than 95% for two sets of data, the results are defined as consistent, and the cables are paired according to the cable end marks; If there are more than two test results with a similarity of more than 95%, five comparison cycles are added and compared again until two sets of test results with a similarity of more than 95% are obtained.

2. A substation cable identification method according to claim 1, characterized in that: The model of the ultrasonic detector is TSUT-350 or RJUT510.

3. A substation cable identification method according to claim 1, characterized in that: The terminal includes a mobile terminal and a cloud server.

4. A substation cable identification method according to claim 1, characterized in that: The marking is sprayed.

5. A substation cable identification method according to claim 4, characterized in that: After the marking mark is sprayed, the marking mark is dried and a waterproof layer is sprayed on the marking mark.

6. An ultrasonic detector installation device used in the method of claim 1, characterized in that: The ultrasonic detector uses a clamp for surround detection. The clamp is clamped at the end of the cable to be detected. The clamp is provided with an annular positioning groove. Two motors are installed on the clamp. An insulating wire is wound around the rotating shaft of the motor. A sliding positioning block is slidably installed in the annular positioning groove. The ultrasonic detector is installed on the sliding positioning block, and both ends of the ultrasonic detector are respectively connected to two insulating wires.

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