Cable load characteristic identification method and system based on optical fiber temperature measurement space position

Abstract

The invention relates to the technical field of optical fiber temperature measurement alarm, and discloses a cable on-load characteristic identification method and system based on an optical fiber temperature measurement spatial position, and the method comprises the steps: screening point locations with the temperature rising, and recording meter marks corresponding to the point locations with the temperature rising; performing first judgment operation based on the recorded result to obtain a first result; calculating the point location probability meeting the spatial position characteristic according to the first result, and performing a second judgment operation based on the point location probability meeting the spatial position characteristic to obtain a second result; and comparing the second result with the maximum value of the on-load historical temperature of the cable, and taking corresponding alarm measures according to the comparison result. According to the invention, by identifying the on-load temperature characteristics and the spatial position characteristics of the cable, the on-load temperature rise of the cable can be effectively identified, false alarm is avoided, and the accuracy of fire alarm is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical fiber temperature measurement alarm, and in particular to a method and system for identifying cable load characteristics based on the spatial position of optical fiber temperature measurement. Background Art

[0002] As an important infrastructure in the power system, the cable corridor carries a large number of power cables. Since the cable generates heat when it is running under load, its temperature will fluctuate with the load change, which makes the temperature monitoring of the cable corridor a key link to ensure the safe operation of the power system. Optical fiber temperature measurement technology is widely used in fire monitoring of cable corridors due to its advantages such as distributed measurement and strong anti-electromagnetic interference ability. However, the application of existing optical fiber temperature measurement technology in the cable under load operation environment has certain limitations, which are mainly reflected in: ① Limitations of fixed temperature or differential temperature alarm mode: At present, the optical fiber temperature measurement system mainly adopts fixed temperature or differential temperature alarm mode; the fixed temperature alarm mode triggers the alarm based on the preset temperature threshold, while the differential temperature alarm mode judges based on the rate of temperature change. However, when the cable is running under load, its temperature will increase to varying degrees due to load changes. This normal temperature fluctuation is easily misjudged as a fire signal, resulting in frequent false alarms. ② Contradiction between false alarms and increased alarm setting values: In order to avoid false alarm problems, operation and maintenance personnel usually increase the alarm setting value. However, although this approach reduces the false alarm rate, it reduces the system's sensitivity to initial fires. When a fire actually occurs in the cable corridor, the system may not be able to detect slight changes in temperature in time, thereby delaying the early detection and response of the fire and increasing the risk of fire spread. ③ Insufficient identification of cable load characteristics: The existing fiber optic temperature measurement system lacks the ability to identify the cable load operation characteristics, and cannot distinguish between the normal temperature rise of the cable caused by load changes and the abnormal temperature rise caused by the fire. This deficiency makes it difficult for the system to achieve accurate monitoring in actual applications, limiting its effectiveness in cable corridor fire warning. ④ Insufficient accuracy of early fire monitoring: The initial stage of a cable corridor fire is usually accompanied by a slow rise in local temperature. However, due to the high alarm setting and mode limitations, the existing system is difficult to capture such subtle temperature changes and cannot achieve accurate monitoring and early warning of fires.

[0003] Therefore, developing a method that can identify cable load characteristics based on the spatial position of optical fiber temperature measurement is of great significance to improving the accuracy and reliability of cable corridor fire monitoring. Summary of the invention

[0004] In view of the above existing problems, the present invention is proposed.

[0005] Therefore, the present invention provides a method and system for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement to solve the problems of the existing optical fiber temperature measurement system being unable to effectively distinguish the normal temperature rise caused by the cable operating under load from the abnormal temperature rise caused by a fire, resulting in a high false alarm rate, insufficient accuracy in the early fire monitoring, and difficulty in achieving accurate early warning and timely response to cable corridor fires.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] In a first aspect, the present invention provides a method for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement, including:

[0008] Screen the points with temperature increase and record the meter marks corresponding to the points with temperature increase;

[0009] Perform a first judgment operation based on the recorded results to obtain a first result;

[0010] Calculate the probability of points satisfying the spatial position characteristics based on the first result, and perform a second judgment operation based on the probability of points satisfying the spatial position characteristics to obtain a second result;

[0011] Compare the second result with the maximum historical temperature of the cable under load, and take corresponding alarm measures based on the comparison result.

[0012] As a preferred scheme of the method for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement according to the present invention, wherein: the first judgment includes:

[0013] Based on the recorded results, obtain the temperature points corresponding to the points that satisfy the condition that the difference between two adjacent meter marks is greater than a first threshold.

[0014] As a preferred scheme of the method for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement according to the present invention, wherein: the first judgment further includes:

[0015] Calculate the sum of the distances between the temperature points and the front and rear temperature points;

[0016] Judge whether the sum of the distances between the temperature points and the front and rear temperature points is within the error range of a second distance threshold, and calculate the number of points that meet the conditions.

[0017] As a preferred scheme of the method for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement according to the present invention, wherein: the calculation of the probability of points satisfying the spatial position characteristics includes:

[0018] Divide the first result by the total number of points that satisfy the temperature characteristics of the loaded cable to obtain the probability of points whose spatial position satisfies the spatial position characteristics of optical fiber temperature measurement.

[0019] As a preferred solution of the cable load-carrying characteristic identification method based on the spatial position of optical fiber temperature measurement according to the present invention, wherein: the second judgment operation includes:

[0020] Judge whether the point probability satisfying the spatial position characteristic meets the accuracy requirement for cable load-carrying characteristic determination. If it meets, it indicates that the cable has a load-carrying characteristic, and the point with the increased temperature is the temperature of the load-carrying cable. If it does not meet, it indicates that the cable does not have a load-carrying characteristic, and the point with the increased temperature is the temperature of the non-load-carrying cable.

[0021] As a preferred solution of the cable load-carrying characteristic identification method based on the spatial position of optical fiber temperature measurement according to the present invention, wherein: the comparison of the second result with the maximum historical temperature of the cable under load includes:

[0022] If it is judged that the point with the increased temperature is the temperature of the load-carrying cable, then compare the temperature of the load-carrying cable with the maximum historical temperature of the cable under load;

[0023] If the temperature of the load-carrying cable is less than the maximum historical temperature of the cable under load, it is considered that the cable temperature is normal. Otherwise, compare the temperature of the load-carrying cable with the set value of the allowable cable operating temperature;

[0024] If the temperature of the load-carrying cable is greater than the set value of the allowable cable operating temperature, an alarm is issued to remind the operation and maintenance personnel to handle it; if the temperature of the load-carrying cable is less than the set value of the allowable cable operating temperature, a warning is issued to remind to pay attention and confirm.

[0025] As a preferred solution of the cable load-carrying characteristic identification method based on the spatial position of optical fiber temperature measurement according to the present invention, wherein: the screening of the points with increased temperature includes:

[0026] Set the test temperature, and the test temperature is the difference between the highest temperature of the measured area and the deviation temperature set manually;

[0027] If it is judged that the temperature of the point is greater than the test temperature, then determine that the point is a point with increased temperature.

[0028] In a second aspect, the present invention provides a cable load-carrying characteristic identification system based on the spatial position of optical fiber temperature measurement, including:

[0029] A screening module, configured to screen the points with increased temperature and record the mileage corresponding to the points with increased temperature;

[0030] A first judgment module, configured to perform a first judgment operation based on the recorded result to obtain a first result;

[0031] A second judgment module, configured to calculate the point probability that meets the spatial position characteristics according to the first result, and perform a second judgment operation based on the point probability that meets the spatial position characteristics to obtain a second result;

[0032] A monitoring and alarm module, configured to compare the second result with the maximum value of the historical temperature of the cable under load, and take corresponding alarm measures based on the result of the comparison.

[0033] In a third aspect, the present invention provides an electronic device, including:

[0034] A memory and a processor;

[0035] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the method for identifying the cable load characteristics based on the spatial position of optical fiber temperature measurement are implemented.

[0036] In a fourth aspect, the present invention provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are executed by a processor, the steps of the method for identifying the cable load characteristics based on the spatial position of optical fiber temperature measurement are implemented.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention provides a method and system for identifying cable load characteristics based on the spatial position of optical fiber temperature measurement. Based on the spatial position of optical fiber temperature measurement, by identifying the cable load temperature characteristics and spatial position characteristics, it can effectively identify the cable load temperature rise, avoid false alarms, and improve the accuracy of fire alarms. Secondly, it can effectively identify the temperature rise situation of the cable under load, eliminate the influence of the temperature rise of the cable under load, and reduce the set value of the fire alarm, which can effectively improve the sensitivity of the fire alarm, is more conducive to detecting the initial fire, and provides strong technical support for effectively extinguishing the initial fire and preventing the expansion of fire accidents. Thirdly, it can effectively identify the cable load characteristics, can effectively monitor the temperature rise situation of the cable, and can issue an alarm when the cable temperature exceeds the historical temperature value, reminding personnel to handle it in advance to prevent secondary fires caused by too high cable temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings 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.

[0039] Figure 1 It is a schematic diagram of the overall process logic of the method for identifying the cable load characteristics based on the spatial position of optical fiber temperature measurement according to an embodiment of the present invention;

[0040] Figure 2 The flowchart of cable load characteristics identification for the cable load characteristics identification method based on the spatial position of optical fiber temperature measurement according to an embodiment of the present invention;

[0041] Figure 3 The cable operating temperature monitoring diagram based on the cable load characteristics for the cable load characteristics identification method based on the spatial position of optical fiber temperature measurement according to an embodiment of the present invention;

[0042] Figure 4 The cable load characteristics diagram for the cable load characteristics identification method based on the spatial position of optical fiber temperature measurement according to an embodiment of the present invention;

[0043] Figure 5 The cable load characteristics determination logic diagram for the cable load characteristics identification method based on the spatial position of optical fiber temperature measurement according to an embodiment of the present invention. Detailed implementation manners

[0044] To make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings of the specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] Embodiment 1, refer to Figures 1-5 An embodiment of the present invention provides a cable load characteristics identification method based on the spatial position of optical fiber temperature measurement, which can effectively identify the cable load situation, avoid alarms caused by cable load temperature rise, and improve the accuracy and sensitivity of optical fiber temperature measurement alarms in cable corridors. As Figure 1 shown, it specifically includes the following steps:

[0046] S100: Screen the points with temperature rise and record the meter marks corresponding to the points with temperature rise;

[0047] S200: Perform a first judgment operation based on the recorded results to obtain a first result;

[0048] S300: Calculate the point probability that meets the spatial position characteristics according to the first result, and perform a second judgment operation based on the point probability that meets the spatial position characteristics to obtain a second result;

[0049] S400: Compare the second result with the maximum historical temperature of the cable under load, and take corresponding alarm measures according to the comparison result.

[0050] It should be noted that the present invention provides a method and system for identifying the on-load characteristics of a cable based on the spatial position of optical fiber temperature measurement. Based on the spatial position of optical fiber temperature measurement, by identifying the on-load temperature characteristics and spatial position characteristics of the cable, the on-load temperature rise of the cable can be effectively identified, false alarms can be avoided, and the accuracy of fire alarm can be improved. Secondly, by effectively identifying the temperature rise situation of the cable and eliminating the influence of the temperature rise of the cable under load, the set value of the fire alarm can be reduced, the sensitivity of the fire alarm can be effectively improved, it is more conducive to detecting incipient fires, and provides strong technical support for effectively extinguishing incipient fires and preventing the expansion of fire accidents. Thirdly, by effectively identifying the on-load characteristics of the cable, the temperature rise situation of the cable can be effectively monitored. When the cable temperature exceeds the historical temperature value, an alarm can be issued to remind personnel to handle it in advance to prevent secondary fires caused by too high cable temperature.

[0051] As Figure 2 shown in the flowchart of cable on-load characteristic identification provided by the embodiment of the present invention. The following will introduce the specific implementation manner of the method for identifying the on-load characteristics of a cable based on the spatial position of optical fiber temperature measurement in combination with Figure 2 this.

[0052] In the embodiment of the present application, the above step S100 of screening the points with temperature rise and recording the mileage corresponding to the points with temperature rise includes:

[0053] Specifically, the screening of the points with temperature rise includes:

[0054] Set the test temperature Tset, and the test temperature is the difference between the highest temperature Tmax in the measured area and the deviation temperature Td set manually;

[0055] If it is judged that the temperature Tn of the point is greater than the test temperature, then it is determined that this point is a point with temperature rise.

[0056] Specifically, record the mileage corresponding to the point with temperature rise, that is, the mileage Xn corresponding to the temperature point where Tn - Tset > 0.

[0057] It should be noted that the above step S100 accurately locates the specific positions in the cable that may have overheating risks by screening out the points with temperature rise and recording their corresponding mileage, provides an accurate data basis for subsequent analysis and judgment, and helps to timely discover potential safety hazards.

[0058] In the embodiment of the present application, the above step S200 performs a first judgment operation based on the recorded results, and the first result obtained includes:

[0059] In an alternative embodiment, the first determination operation may be a threshold determination, i.e., setting a temperature threshold (e.g., the maximum operating temperature allowed for the cable material). If the temperature at a certain point exceeds this threshold, it is marked as an abnormal point. The first determination operation may also be an analysis of the temperature change rate, i.e., calculating the rate of change of the temperature with respect to time (i.e., the speed of temperature rise) at each point. If the temperature change rate at a certain point is significantly higher than that of other normally operating points, this may be an early sign of a potential fault;

[0060] In an alternative embodiment, the first determination operation may also be a check of the temperature consistency of spatially adjacent points, i.e., comparing the temperature differences between each temperature-rising point and its adjacent points around it. In a continuous cable section, under normal circumstances, the temperature difference between points should be relatively small. If the temperature at a certain point is significantly higher than that of its adjacent points, it indicates that there may be problems such as local heat sources or insulation damage.

[0061] In the embodiment of the present application, the steps of the first determination operation include:

[0062] Based on the recorded results, obtain the temperature points corresponding to the points that meet the condition that the difference between two adjacent meter marks is greater than the first threshold;

[0063] Calculate the sum of the distances between the temperature point and the front and rear temperature points;

[0064] Determine whether the sum of the distances between the temperature point and the front and rear temperature points is within the error range of the second distance threshold, and calculate the number of points that meet the condition;

[0065] Specifically, the first result is the number of points that meet the condition.

[0066] In an alternative embodiment, the determination of the first threshold needs to consider: ① Consider the heat conduction performance of the cable material. Usually, the temperature change between adjacent points should be relatively smooth. If the temperature difference between two adjacent meter marks is too large, it may mean that there are local overheating points or insufficient cooling. A reasonable change threshold can be set according to parameters such as the thermal conductivity and diameter of the cable material; ② Analyze the historical data of the cable under normal operating conditions to determine the maximum allowable difference between adjacent points. For example, find the maximum difference within the 95% confidence interval through statistical analysis as the first threshold; ③ Consider the influence of the external environment, such as the influence of external temperature fluctuations, wind speed, etc. on the cable heat dissipation, and appropriately adjust the first threshold to adapt to different working environments;

[0067] In an optional embodiment, the determination of the second distance threshold needs to consider that when the cable length is long, the temperature distribution usually does not change sharply. Therefore, a reasonable distance threshold can be set based on the overall length and design specifications of the cable. For example, assuming that the temperature change per meter of the cable should not exceed a certain specific value, the appropriate second distance threshold can be calculated based on this value.

[0068] Exemplarily, the steps of the first determination operation are as follows:

[0069] Judge whether the spatial distance Xn+1 - Xn > d, where d is a set value manually given according to the sampling accuracy of optical fiber temperature measurement; record the corresponding temperature point that meets the above conditions as Tn;

[0070] Calculate the sum of the distances Dn = dn-1 + dn+1 between the temperature point Tn and the temperature points Tn-1 and Tn+1, where dn-1 = Xn - Xn-1, dn+1 = xn+1 - Xn, Xn is the meter mark corresponding to the temperature point Tn, Xn-1 is the meter mark corresponding to the temperature point Tn-1, and Xn+1 is the corresponding meter mark of Tn+1;

[0071] Judge whether Dn is within the error range of the set distance Dset, |Dn - Dset| < K·Dset, where Dset is the average value of the spatial distances measured according to the laying position of the on-load cable on site, and K is the error range coefficient, which is set according to the on-site situation;

[0072] Calculate the number of points that meet the above requirements, denoted as m;

[0073] It should be noted that the above step S200 can quickly identify which points may have abnormal temperature rise problems, providing a clear direction for subsequent calculations and further analysis, and improving the efficiency and accuracy of fault diagnosis.

[0074] In the embodiment of the present application, the above step S300 calculates the point probability that meets the spatial position characteristics according to the first result, and performs a second determination operation based on the point probability that meets the spatial position characteristics, and the second result obtained includes:

[0075] Specifically, calculating the point probability that meets the spatial position characteristics includes: dividing the first result by the total number of points that meet the temperature characteristics of the on-load cable to obtain the point probability that the spatial position meets the spatial position characteristics of the optical fiber temperature measurement, where the first result is the total number of points m that meet the temperature characteristics and spatial characteristics of the on-load cable.

[0076] In an alternative embodiment, the second determination operation may be a probability threshold determination, that is, a probability threshold is set. If the probability of a certain point exceeds this threshold, it is considered that there is a significant risk at this point; the second determination operation may also be a comprehensive risk assessment, that is, multiple factors (such as the amplitude of temperature increase, the rate of change, historical failure records, etc.) are combined to perform a comprehensive score for each point, and then a comprehensive score threshold is set. Only when the score of a certain point exceeds this threshold is it marked as a high-risk point that needs attention;

[0077] In an alternative embodiment, the second determination operation may also be trend analysis, that is, time series analysis is performed on the points that meet the spatial position characteristic conditions, and the temperature change trends of these points are observed; if the temperature of a certain point shows a continuous upward trend, and this trend is significantly abnormal compared with the historical data of the cable under load, then it is marked as a potential problem point.

[0078] In the embodiment of the present application, the steps of the second determination operation include:

[0079] Determine whether the probability of the points that meet the spatial position characteristics meets the accuracy requirements for cable load characteristics determination, where the accuracy requirements for cable load characteristics determination can be set according to requirements and the on-site environment;

[0080] If it is satisfied, it means that the cable has load characteristics, and the point with the increased temperature is the temperature of the loaded cable. If it is not satisfied, it means that the cable does not have load characteristics, and the point with the increased temperature is the temperature of the unloaded cable, as Figure 4 shown in the cable load characteristic diagram, as Figure 5 shown in the cable load characteristic determination logic diagram.

[0081] It should be noted that after identifying the cable load characteristics, the operation of the cable can be monitored to prevent fires caused by cable failures and improve the overall monitoring ability of fires in the cable corridor.

[0082] It should be noted that the above step S300 can more accurately evaluate the probability of abnormalities at each point, identify potential problem areas in combination with spatial characteristics, and enhance the accuracy and reliability of fault location.

[0083] In the embodiment of the present application, the above step S400 compares the second result with the maximum value of the historical temperature of the cable under load, and the corresponding alarm measures are taken according to the comparison result, including:

[0084] Specifically, as Figure 3 shown:

[0085] If it is determined that the point with the increased temperature is the temperature of the loaded cable, then the loaded cable temperature Tx is compared with the maximum value of the historical temperature of the cable under load TLmax;

[0086] If the cable temperature under load is less than the maximum value of the cable's historical under-load temperature, the cable temperature is considered normal. Otherwise, the cable temperature Tx under load is compared with the cable operating allowable temperature setting value Ts.

[0087] If the temperature of the loaded cable is higher than the set value of the allowable cable operating temperature, an alarm is issued to remind the operation and maintenance personnel to handle it; if the temperature of the loaded cable is lower than the set value of the allowable cable operating temperature, an early warning is issued to remind attention and confirmation.

[0088] It should be noted that the above step S400 compares the second result with the historical maximum temperature of the cable under load, and takes corresponding alarm measures based on the comparison result. It can monitor the cable operation status in real time, promptly discover and respond to overheating risks, ensure rapid warning when the temperature rises abnormally, effectively prevent potential failures, and ensure the safety and stability of cable operation.

[0089] Embodiment 2, based on the previous embodiment, this embodiment provides an application example of a cable load characteristic identification method and system based on the spatial position of optical fiber temperature measurement, in order to verify and illustrate the technical effects adopted in this method.

[0090] In this embodiment, the temperature deviation Td is set to 20°C, the spatial distance d is set to 0.5m, the average value Dset of the sum of the measured spatial distances between the loaded cable laying position and the adjacent points is set to 1m, the error range coefficient K is set to 0.2, Pset is set to 0.8, and TS is set to 65°C to identify the cable load characteristics and monitor the cable operation status.

[0091] S1: First, select the points where the temperature rises and determine whether they are continuous in space.

[0092] Specifically, filter the temperature rise points:

[0093] Filter out the highest temperature value Tmax in the temperature measurement area according to the temperature measurement data;

[0094] Calculate Tset = Tmax - Td, that is, Tset = Tmax - 20;

[0095] Determine that the temperature in the comparison temperature zone is Tn-Tset>0;

[0096] S2: If the temperature Tn-Tset>0, record the meter mark Xn corresponding to the temperature point;

[0097] S3: Calculate and determine that the spatial distance Xn+1-Xn>d, where d is a manually set value based on the optical fiber temperature measurement sampling accuracy, that is, Xn+1-Xn>0.5;

[0098] S4: If the above conditions are met, record the corresponding temperature point Tn, and record them in sequence as T1, T2, T3...Tn;

[0099] S5: Calculate the sum of the distances Dn between the temperature point Tn and the temperature points Tn-1 and Tn+1, where Dn = dn-1 + dn+1, dn-1 = Xn - Xn-1, dn+1 = Xn+1 - Xn, Xn is the meter mark corresponding to the temperature point Tn, Xn-1 is the meter mark corresponding to the temperature point Tn-1, and Xn+1 is the meter mark corresponding to Tn+1;

[0100] S6: Determine whether Dn is within the error range of the set distance Dset. Dset is set to 1m and k is set to 0.2, i.e., |Dn - 1| < 0.2·1;

[0101] S7: Calculate the number of points that meet the above requirements and record it as m;

[0102] S8: Calculate the probability P = m / n that the spatial position meets the characteristics of the fiber optic temperature measurement spatial position, where n is the total number of points that meet the temperature characteristics of the loaded cable, and m is the total number of points that meet the temperature characteristics and spatial characteristics of the loaded cable;

[0103] S9: Determine whether the probability P of the temperature points that meet the cable loading characteristics is greater than Pset. Pset is the accuracy requirement for determining the cable loading characteristics and is set to 0.8 according to the requirements and the on-site environment, i.e., P > 0.8 is recognized as the cable having the loading characteristics.

[0104] S10: If the relevant temperature data is the cable loading temperature data, record this data as Tx;

[0105] S11: Compare the cable loading temperature data Tx with the maximum historical cable loading temperature TLmax. If it is less than TLmax, it is considered that the cable temperature is normal;

[0106] S12: If Tx > TLmax, then compare it with the set value Ts of the allowable cable operating temperature. Ts is 65°C. If Tx > 65°C, an alarm is issued to remind the operation and maintenance personnel to handle it. If Tx < 65°C, a warning is issued to remind to pay attention and confirm.

[0107] As can be seen from the above embodiments, the present invention provides a method and system for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement. Based on the spatial position of optical fiber temperature measurement, by identifying the load-carrying temperature characteristics and spatial position characteristics of the cables, the load-carrying temperature rise of the cables can be effectively identified, false alarms can be avoided, and the accuracy of fire alarms can be improved. Secondly, by effectively identifying the temperature rise of the cables under load and eliminating the influence of the temperature rise of the cables under load, the set value of the fire alarm can be reduced, the sensitivity of the fire alarm can be effectively improved, it is more conducive to detecting incipient fires, and provides strong technical support for effectively extinguishing incipient fires and preventing the expansion of fire accidents. Thirdly, by effectively identifying the load-carrying characteristics of the cables, the temperature rise of the cables can be effectively monitored. When the cable temperature exceeds the historical temperature value, an alarm can be issued to remind personnel to handle it in advance to prevent secondary fires caused by excessive cable temperature.

[0108] Embodiment 3. In this embodiment, a system for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement is provided, including a screening module, a first judgment module, a second judgment module, and a monitoring and alarm module;

[0109] Specifically, the screening module is used to screen the points where the temperature rises and record the meter marks corresponding to the points where the temperature rises;

[0110] Specifically, the first judgment module is used to perform a first judgment operation based on the recorded results to obtain a first result;

[0111] Specifically, the second judgment module is used to calculate the probability of the points that meet the spatial position characteristics according to the first result, and perform a second judgment operation based on the probability of the points that meet the spatial position characteristics to obtain a second result;

[0112] Specifically, the monitoring and alarm module is used to compare the second result with the maximum value of the historical temperature of the cable under load, and take corresponding alarm measures according to the comparison result.

[0113] It should be noted that the technical solution of the system for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement belongs to the same concept as the technical solution of the method for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement described above. For the details not described in the technical solution of the system for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement in this embodiment, reference can be made to the description of the technical solution of the method for identifying the load-carrying characteristics of cables based on the spatial position of optical fiber temperature measurement described above.

[0114] The above-mentioned unit modules can be embedded in the processor of the computer device in hardware form or be independent of it, or can be stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to the above-mentioned modules.

[0115] This embodiment also provides an electronic device, which includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a carrier network, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it realizes a method for identifying the load characteristics of a cable based on the spatial position of optical fiber temperature measurement. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a button, a trackball, or a touchpad set on the shell of the computer device, or an external keyboard, touchpad, or mouse, etc.

[0116] This embodiment also provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by the processor, it realizes the method proposed in the above embodiment.

[0117] The storage medium proposed in this embodiment and the method proposed in the above embodiment belong to the same inventive concept. For technical details not described in detail in this embodiment, reference can be made to the above embodiment, and this embodiment has the same beneficial effects as the above embodiment.

[0118] From the above description of the embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software and necessary general-purpose hardware. Of course, it can also be implemented by hardware, but in many cases, the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a floppy disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (FLASH), a hard disk, or an optical disc of a computer, etc., and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the method of the embodiments of the present invention.

[0119] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

[0120] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an all-hardware embodiment, an all-software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented in various computer languages.

[0121] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0122] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, so that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0124] Although the preferred embodiments of the present application have been described, additional changes and modifications can be made to these embodiments by those skilled in the art once they learn of the basic inventive concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present application.

[0125] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims

1. A cable load characteristic identification method based on optical fiber temperature measurement spatial position, characterized in that: include: Screening points where the temperature rises, and recording the meter marks corresponding to the points where the temperature rises; Perform a first judgment operation based on the recorded result to obtain a first result; Calculating the probability of points satisfying the spatial position characteristic according to the first result, and performing a second judgment operation based on the probability of points satisfying the spatial position characteristic to obtain a second result; The second result is compared with the maximum value of the cable load temperature in history, and corresponding alarm measures are taken according to the comparison result.

2. The cable load characteristic identification method based on optical fiber temperature measurement spatial position according to claim 1 is characterized in that: The first judgment includes: Based on the recorded results, the temperature points corresponding to the points that meet the condition that the difference between two adjacent meter marks is greater than the first threshold are obtained.

3. The cable load characteristic identification method based on optical fiber temperature measurement spatial position according to claim 2 is characterized in that: The first judgment also includes: Calculating the sum of the distances between the temperature point and the preceding and following temperature points; It is determined whether the sum of the distances between the temperature point and the preceding and succeeding temperature points is within an error range of a second distance threshold, and the number of points that meet the condition is calculated.

4. The cable load characteristic identification method based on optical fiber temperature measurement spatial position according to claim 3 is characterized in that: The calculation of the point probability satisfying the spatial position characteristic includes: The first result is divided by the total number of points that satisfy the temperature characteristics of the loaded cable to obtain the probability of the point whose spatial position satisfies the spatial position characteristics of the optical fiber temperature measurement.

5. The cable load characteristic identification method based on optical fiber temperature measurement spatial position according to claim 4 is characterized in that: The second determination operation includes: It is determined whether the probability of the point satisfying the spatial position characteristics meets the accuracy requirement for determining the cable load characteristics. If so, it means that the cable has the load characteristic, and the point where the temperature rises is the loaded cable temperature. If not, it means that the cable does not have the load characteristic, and the point where the temperature rises is the unloaded cable temperature.

6. The cable load characteristic identification method based on optical fiber temperature measurement spatial position according to claim 5, characterized in that: The comparing the second result with the maximum value of the cable load historical temperature comprises: If it is determined that the point where the temperature rises is the temperature of the loaded cable, the loaded cable temperature is compared with the maximum value of the cable's historical loaded temperature; If the loaded cable temperature is less than the maximum value of the cable's historical loaded temperature, the cable temperature is considered normal; otherwise, the loaded cable temperature is compared with the cable operation allowable temperature setting value; If the temperature of the loaded cable is greater than the set value of the cable operation allowable temperature, an alarm is issued to remind the operation and maintenance personnel to handle it; if the temperature of the loaded cable is less than the set value of the cable operation allowable temperature, an early warning is issued to remind attention and confirmation.

7. The cable load characteristic identification method based on optical fiber temperature measurement spatial position according to claim 1, characterized in that: The screening of the temperature-elevated points includes: Setting a test temperature, which is the difference between the highest temperature of the measured area and a manually set deviation temperature; If the temperature of the determination point is greater than the test temperature, the point is determined to be a point with increased temperature.

8. A cable load characteristic identification system based on optical fiber temperature measurement spatial position, using the method according to any one of claims 1 to 7, characterized in that: include: A screening module, used to screen points where the temperature rises, and record the meter marks corresponding to the points where the temperature rises; A first judgment module, used to perform a first judgment operation based on the recorded result to obtain a first result; A second judgment module, used to calculate the probability of points satisfying the spatial position characteristics according to the first result, and perform a second judgment operation based on the probability of points satisfying the spatial position characteristics to obtain a second result; The monitoring and alarm module is used to compare the second result with the maximum value of the cable's historical load temperature and take corresponding alarm measures based on the comparison result.

9. An electronic device, comprising a memory and a processor, characterized in that: The memory is used to store computer executable instructions, and the processor is used to execute the computer executable instructions. When the computer executable instructions are executed by the processor, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium having computer-executable instructions stored thereon, characterized in that: When the computer executable instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

Images