Cable equipment multi-mode positioning system and method

Abstract

The invention discloses a cable equipment multi-mode positioning system and method, and relates to the technical field of cable equipment localization. In the working process of a multi-mode positioning classification module, cable equipment laying environment information is obtained from a database; a classification standard is set to be high in medium adaptability, high in external interference resistance, low in medium adaptability and low in external interference resistance, and positioning modes are divided into four types, so that the most suitable positioning mode can be quickly and accurately screened out in different cable laying environments, and in the environments with the high medium adaptability and the high interference resistance, the positioning modes can be quickly and accurately screened out. The first type of positioning mode is preferentially selected, the accuracy and the high efficiency of positioning are ensured, complex medium conditions and interference factors in an actual environment are considered, the problem that a single mode loses efficacy in some special environments is avoided, and the adaptability of the positioning system to different environments is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable equipment positioning, and in particular to a cable equipment multi-mode positioning system and method. Background Art

[0002] With the continuous development of power and communication networks, cable systems are becoming increasingly complex. The traditional single cable fault location and maintenance assessment method can no longer meet actual needs. Under the influence of various environmental factors (such as temperature, humidity, electromagnetic interference, etc.), the cable positioning accuracy and maintenance strategy formulation become more difficult. Therefore, we need to develop a more intelligent and comprehensive cable fault location system.

[0003] The system should be able to accurately locate the faulty cable using multiple positioning modes based on the cable's dielectric parameters, environmental interference factors, and other factors. It can use cable performance analysis, electromagnetic wave detection, acoustic wave monitoring, and other technologies to provide maintenance personnel with accurate location information of the faulty cable and determine appropriate maintenance material standards. This will not only enable fast and accurate fault location, reduce maintenance time and costs, but also minimize the impact of power grid failures on users.

[0004] For example, a cable fault online positioning system and positioning method thereof is disclosed in the China Patent Network, and its application number is: CN202310611179.3. It includes: a sensor for collecting the electrical parameters of the cable; the sensor is connected to the monitoring terminal, and the electrical parameters are transmitted to the monitoring terminal, and the monitoring terminal determines whether the cable is faulty according to the electrical parameters and calculates the fault distance, and the monitoring terminal also includes an alarm unit for issuing an alarm message, connecting to the backend server through the communication network, and sending the electrical parameters, the fault distance and the alarm information to the backend server, and the backend server includes monitoring software, and the monitoring software displays and stores the electrical parameters, the fault distance and the alarm information in real time.

[0005] With respect to the above solution, there are at least the following technical problems.

[0006] The above scheme only mentions an online positioning system based on sensors collecting electrical parameters to judge cable faults and calculate fault distances. The lack of a multi-mode positioning classification mechanism means that it is impossible to select the best positioning mode according to different media adaptability and anti-interference capabilities in complex environments. For example, when the cable is laid in a medium with high conductivity or in an environment with strong electromagnetic interference, a single positioning method based on electrical parameters will be severely interfered with or unable to work accurately.

[0007] The above scheme lacks content for determining the standards for the use of maintenance materials based on the positioning mode. In actual cable fault maintenance, different positioning modes mean different maintenance methods and required materials. For example, if a positioning mode with strong adaptability to the medium but weak anti-interference is used, special electromagnetic shielding treatment of the surrounding environment is required during maintenance, and corresponding shielding materials need to be used. The above scheme lacks such a connection, which causes maintenance personnel to choose inappropriate materials during the maintenance process and cannot effectively solve potential problems caused by the characteristics of the positioning mode, affecting the maintenance effect and the subsequent normal operation of the cable.

[0008] The above scheme lacks the evaluation of the comprehensive influence coefficient of medium positioning, which makes the system unable to comprehensively measure the impact of the cable laying environment on positioning, resulting in blindness in the selection of positioning mode and inability to optimize the selection based on the comprehensive impact of the environment on positioning. For example, if the fault is judged only based on electrical parameters, in an environment with poor medium adaptability and strong interference, even if the sensor collects electrical parameters, it is impossible to accurately calculate the fault distance because of the lack of comprehensive influence of the environment on the propagation and reception of positioning signals, thereby reducing the reliability and practicality of the entire positioning system in complex environments, and failing to meet the needs of cable fault positioning in different environments. Summary of the invention

[0009] The present invention aims to establish multiple positioning modes for faulty cable equipment, so that suitable repair materials can be selected according to the positioning modes of the cable equipment before repair, thereby improving the repair effect of the cable equipment in complex environments.

[0010] Another object of the present invention is to establish a selection method for a positioning mode according to relevant parameters of the laying environment where the cable equipment is located, so that the established positioning mode can more accurately reflect the environmental conditions where the faulty cable equipment is located.

[0011] In order to achieve the above-mentioned object, the present invention adopts the following technical scheme.

[0012] The positioning mode selection module obtains the medium positioning comprehensive influence coefficient of the cable equipment through the cable equipment laying environment analysis module and selects the positioning mode; the faulty cable equipment evaluation module obtains the positioning mode of the cable equipment through the positioning mode selection module and selects the maintenance materials of the cable equipment.

[0013] Furthermore, the cable equipment laying environment analysis module obtains the dielectric positioning adaptation parameters and dielectric positioning interference parameters corresponding to the cable equipment laying environment through a database, and then obtains the dielectric positioning comprehensive influence coefficient of the cable equipment.

[0014] Furthermore, the positioning mode selection module obtains the dielectric positioning comprehensive influence coefficient of the cable equipment, determines the numerical range interval through the dielectric positioning comprehensive influence coefficient of the cable equipment; searches the database for the corresponding positioning mode according to the numerical range interval to determine the positioning mode of the cable equipment.

[0015] Furthermore, the faulty cable equipment assessment module obtains a positioning pattern of the cable equipment, and searches a database for maintenance materials corresponding to the positioning pattern of the cable equipment through the positioning pattern of the cable equipment.

[0016] Furthermore, the cable equipment laying environment analysis module, the positioning mode selection module and the faulty cable equipment evaluation module are all connected to the database.

[0017] Furthermore, the cable equipment laying environment analysis module is connected to the positioning mode selection module via a data transmission channel, and the cable equipment laying environment analysis module sends the medium comprehensive influence coefficient of the cable equipment to the positioning mode selection module via the data transmission channel.

[0018] Further, the positioning mode selection module is connected to the faulty cable equipment assessment module via a data transmission channel, and the positioning mode selection module sends the positioning mode of the cable equipment to the faulty cable equipment assessment module via the data transmission channel.

[0019] Furthermore, the system also includes a multi-mode positioning classification module; the multi-mode positioning classification module obtains the advantages and disadvantages information corresponding to each positioning mode and the laying environment of the cable equipment, and then classifies each positioning mode according to the set classification standard.

[0020] The method for obtaining the fault cable locating mode is as follows.

[0021] S1. Call the multi-mode positioning classification module to classify the positioning modes of the cable equipment; S2. Call the cable equipment laying environment analysis module to obtain the medium positioning comprehensive influence coefficient of the faulty cable equipment, and send the medium positioning comprehensive influence coefficient to the positioning mode selection module through the data channel; S3. Call the positioning selection module to select the positioning mode through the obtained medium positioning comprehensive influence coefficient, and send the positioning mode information to the faulty cable equipment evaluation module through the data channel; S4. Call the faulty cable equipment evaluation module to find the maintenance materials corresponding to the faulty cable equipment through the obtained positioning mode information.

[0022] Further, if the comprehensive influence coefficient of the dielectric positioning of the faulty cable device is greater than zero and less than a first threshold, the positioning mode of the faulty cable device is the first positioning mode; if the comprehensive influence coefficient of the dielectric positioning of the faulty cable device is greater than the first threshold and less than the second threshold, the positioning mode of the faulty cable device is the second positioning mode; if the comprehensive influence coefficient of the dielectric positioning of the faulty cable device is greater than the second threshold and less than the third threshold, the positioning mode of the faulty cable device is the third positioning mode; if the comprehensive influence coefficient of the dielectric positioning of the faulty cable device is greater than the third threshold and less than the fourth threshold, the positioning mode of the faulty cable device is the fourth positioning mode.

[0023] The beneficial effects of the present invention are:

[0024] The present invention provides a cable equipment multi-mode positioning system and method. During the working process of the multi-mode positioning classification module, the environmental information of the cable equipment laying is obtained from the database, and the classification standards are set as strong medium adaptability, strong resistance to external interference, weak medium adaptability and weak resistance to external interference. In this way, the positioning modes are divided into four types. This is beneficial for quickly and accurately screening out the most suitable positioning mode when facing different cable laying environments. In an environment with strong medium adaptability and strong resistance to interference, the first type of positioning mode is preferentially selected to ensure the accuracy and efficiency of positioning. The complex medium conditions and interference factors in the actual environment are taken into consideration, and the problem of failure of a single mode in certain special environments is avoided, which helps to increase the adaptability of the positioning system to different environments.

[0025] During the working process of the cable equipment laying environment analysis module, when a cable equipment failure occurs in the specified area, analyzing the medium positioning adaptation parameters and the medium positioning interference parameters is helpful to fully understand the characteristics of the cable laying environment. The medium parameters cover the physical properties that have an important influence on positioning. Comprehensive consideration of the medium parameters is conducive to accurately evaluating the impact of the environment on positioning, providing sufficient basis for the subsequent selection of the appropriate positioning mode, and avoiding positioning errors caused by ignoring certain key parameters.

[0026] In the process of evaluating the dielectric positioning comprehensive influence coefficient and the dielectric positioning adaptation coefficient of the cable equipment laid in the specified area, the dielectric positioning comprehensive influence coefficient is substituted into the positioning comprehensive influence evaluation expression for analysis, which is conducive to quantifying the impact of complex environmental factors on positioning. Through specific calculations, the difficulty of positioning in different environments can be intuitively seen, rather than relying solely on experience or qualitative judgment, thereby providing scientific guidance for positioning work and improving the success rate of positioning.

[0027] In the process of evaluating the corresponding positioning mode for the faulty cable equipment in the specified area, the threshold of the medium positioning comprehensive influence coefficient is obtained from the database, and the positioning mode is determined by comparing the medium positioning interference coefficient with the standard threshold. This is conducive to accurately selecting the mode that best suits the current faulty cable environment from a variety of positioning modes. Through multi-level judgment, it is helpful to finely distinguish the applicability of different types of positioning modes, avoid selecting the wrong positioning mode due to simple judgment, and improve the accuracy and reliability of positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A method for obtaining weight values ​​in Mdc values.

[0029] Figure 2 The present invention is a schematic diagram of the steps of the method.

[0030] Figure 3 The present invention is a schematic diagram of a system. DETAILED DESCRIPTION

[0031] Embodiment 1, this embodiment discloses the connection mode between modules in the system of the present invention, the function of each module in the system and the cooperation mode between each module in the system, refer to Figure 3 .

[0032] The system includes: a multi-mode positioning classification module, a cable equipment laying environment analysis module, a positioning mode selection module and a fault cable equipment evaluation module.

[0033] The multi-mode positioning classification module is connected with the cable equipment laying environment analysis module and the database respectively; a data transmission channel is provided between the multi-mode positioning classification module and the cable equipment laying environment analysis module; and a data transmission channel is provided between the multi-mode positioning classification module and the database.

[0034] The multi-mode positioning classification module is used to obtain the quality information corresponding to each positioning mode of the cable equipment and the laying environment of the cable equipment, so as to classify each positioning mode according to the set positioning mode classification standard.

[0035] The multi-mode positioning classification module classifies each positioning mode according to the set classification standards. The specific process is as follows: the environmental information of the cable equipment laying is obtained from the database through the data transmission channel, so that the classification standards of each positioning mode of the cable equipment are set as strong medium adaptability, strong resistance to external interference, weak medium adaptability and weak resistance to external interference, thereby dividing each positioning mode into four types.

[0036] Positioning mode types include: The first type of positioning mode: The first type of positioning mode means that the cable equipment has stronger medium adaptability and stronger resistance to external interference.

[0037] The second type of positioning mode: The second type of positioning mode means that the cable equipment has stronger medium adaptability and weaker resistance to external interference.

[0038] The third type of positioning mode: The third type of positioning mode represents that the cable equipment has weaker dielectric adaptability and stronger resistance to external interference.

[0039] The fourth type of positioning mode: The fourth type of positioning mode means that the cable equipment has weaker dielectric adaptability and weaker resistance to external interference.

[0040] The four types include strong medium adaptability and strong resistance to external interference, strong medium adaptability and weak resistance to external interference, weak medium adaptability and strong resistance to external interference, and weak medium adaptability and weak resistance to external interference, which are respectively recorded as the first category, the second category, the third category and the fourth category, so as to obtain the types corresponding to each positioning mode.

[0041] Let's take an example to illustrate this.

[0042] For example, electromagnetic induction positioning technology works better in media with low conductivity (such as plastic or rubber sheaths) because electromagnetic signals can propagate better in low-conductivity media. Ultrasonic positioning technology, on the other hand, relies more on the physical properties of the medium, such as density and elasticity. If the medium has poor adaptability, the ultrasonic signal is prone to serious attenuation, path change, or excessive reflection and scattering during propagation, thus affecting the positioning accuracy. Therefore, the physical properties of the medium are one of the key factors that restrict the applicability of the positioning mode.

[0043] In the actual cable laying environment, there will also be electromagnetic interference from nearby power equipment, communication equipment, etc., as well as external interference such as traffic vibration and mechanical vibration caused by mechanical operation. For positioning modes with weak anti-interference capabilities, these interference signals may overwhelm the positioning signal, resulting in errors in positioning results. Therefore, the positioning system's ability to resist external interference is also an important indicator for judging its applicability.

[0044] The laying environment information of cable equipment includes but is not limited to the following aspects: Geological environment: such as soil type, groundwater level, stratum structure, etc. These factors will affect the cable laying method and material selection, which in turn affects the applicability and measurement accuracy of electromagnetic induction, ultrasonic and other positioning technologies.

[0045] Surrounding facilities and environment: such as above-ground buildings, underground pipelines, etc., which will change the cable laying path, hinder the propagation of positioning signals, and also become interference factors that need to be identified and avoided during the positioning process.

[0046] Electromagnetic environment: including the distribution of electromagnetic interference sources generated by nearby power equipment, communication equipment, etc., the intensity and frequency range of electromagnetic noise, etc.

[0047] The cable equipment laying environment analysis module is used to obtain the cable equipment laying environment if a fault occurs in the cable equipment in the specified area.

[0048] The laying environment information of cable equipment is crucial to the performance and applicability of the fault location system. The cable equipment laying environment analysis module should be able to comprehensively analyze the actual use environment of cable equipment in a specified area, including geological environment, surrounding facility environment and electromagnetic environment.

[0049] Among them, the geological environment involves factors such as soil type, groundwater level, and stratum structure, which will affect the cable laying method and material selection, thereby affecting the applicability and accuracy of electromagnetic induction, ultrasonic and other positioning technologies. The surrounding facilities environment, such as above-ground buildings and underground pipelines, will change the cable laying path, hinder the propagation of positioning signals, and become interference factors that need to be identified and avoided. The electromagnetic environment includes the distribution of electromagnetic interference sources generated by nearby power equipment and communication equipment, the intensity of electromagnetic noise, and the frequency range.

[0050] Specifically speaking of medium parameters, medium positioning adaptation parameters include conductivity, dielectric constant and medium density, which will determine the applicability of electromagnetic induction and ultrasonic positioning technology. Medium positioning interference parameters include magnetic permeability and mechanical vibration frequency, which will affect the propagation and detection of positioning signals.

[0051] It should be noted that the acquisition of these cable dielectric parameters requires the use of professional measuring instruments and equipment. Specifically, the dielectric conductivity can be measured by directly measuring the conductivity in the medium using a conductivity meter. The dielectric constant requires measuring the capacitance change of the medium in the electric field, which can be measured using a capacitance measuring device or a dielectric spectrometer. The dielectric density can be obtained through physical measurement methods such as weighing and volume measurement, or it can be directly measured using a density meter. The magnetic permeability needs to be determined with the help of magnetic measuring instruments such as a permeometer or a magnetic property measurement system. Finally, the mechanical vibration frequency can be measured by a vibration sensor and a spectrum analyzer to capture and analyze the vibration signal in the medium to determine the vibration frequency.

[0052] The evaluation of the dielectric positioning comprehensive influence coefficient of the cable equipment laying in the specified area is specifically carried out as follows: according to the dielectric positioning adaptation parameters and the dielectric positioning interference parameters corresponding to the cable equipment laying environment in the specified area, the dielectric positioning adaptation coefficient and the dielectric positioning interference coefficient corresponding to the faulty cable equipment laying environment in the specified area are respectively analyzed and obtained, and the dielectric positioning adaptation coefficient and the dielectric positioning interference coefficient are respectively denoted as Mdc and Mic, and the value of the dielectric positioning comprehensive influence coefficient is: the dielectric positioning matching coefficient divided by the sum of the dielectric positioning matching coefficient and the dielectric positioning interference coefficient.

[0053] Its expression is: Among them, Mdc is the medium positioning adaptation coefficient, and Mic is the medium positioning interference coefficient.

[0054] The cable equipment laying environment analysis module obtains the dielectric positioning adaptation coefficient corresponding to the laying environment of the faulty cable equipment in the specified area. The specific process is as follows: the conductivity value range, dielectric constant value range and dielectric density value range set before the dielectric positioning adaptation parameters corresponding to the laying environment of the cable equipment in the specified area are obtained from the database, and the corresponding maximum and minimum values ​​in the conductivity value range, dielectric constant value range and dielectric density value range are recorded as: σ max , σ min ; ε max , ε min ρ max , ρ min .

[0055] The value of Mdc is: the medium conductivity minus the minimum value of the medium conductivity, divided by the difference between the maximum value of the medium conductivity and the minimum value of the medium conductivity, and then multiplied by the weight value corresponding to the medium conductivity to obtain the medium conductivity correction value; the dielectric constant minus the minimum value of the dielectric constant, divided by the difference between the maximum value of the dielectric constant and the minimum value of the dielectric constant, and then multiplied by the weight value corresponding to the dielectric constant to obtain the dielectric constant correction value; the medium density minus the minimum value of the dielectric density, divided by the difference between the maximum value of the dielectric density and the minimum value of the dielectric density, and then multiplied by the weight value corresponding to the dielectric density to obtain the dielectric density correction value; the dielectric conductivity correction value, the dielectric constant correction value and the dielectric density correction value are added together to obtain the medium positioning adaptation coefficient, that is, the value of Mdc.

[0056] Its expression is: Among them, σ represents the dielectric conductivity; ε represents the dielectric constant; ρ represents the dielectric density; μ 1 Expressed as the weight value corresponding to the conductivity of the medium; μ 2 Expressed as the weight value corresponding to the dielectric constant; μ 3 is the weight value corresponding to the medium density.

[0057] Different cable equipment is located in different environments, so the weights assigned to them are also different.

[0058] For different cable devices in a certain laying environment, the signal strength of the electromagnetic positioning signal under the dielectric conductivity, dielectric constant and dielectric density of different cable devices is obtained from the database. The influence of different dielectric conductivity data, dielectric constant and dielectric density data on the signal strength value of the electromagnetic positioning signal under the same laying environment is analyzed.

[0059] Reference Figure 1 , the specific process is as follows.

[0060] With dielectric conductivity data, dielectric constant and dielectric density data as independent variables and electromagnetic positioning signal strength as dependent variable, three sets of data were constructed: dielectric conductivity data as independent variable and electromagnetic positioning signal strength as dependent variable; dielectric constant as independent variable and electromagnetic positioning signal strength as dependent variable; dielectric density data as independent variable and electromagnetic positioning signal strength as dependent variable. Variance analysis was performed on these three sets of data to calculate the F statistic.

[0061] If the F statistic is less than the critical value, the weight value corresponding to the dielectric conductivity constant, the weight value corresponding to the dielectric constant, and the weight value corresponding to the dielectric density are given the same value.

[0062] If the F statistic is greater than the critical value, the independent variable is selected, the absolute value of the spermman correlation coefficient and the absolute value of the Pearson correlation coefficient between the independent variable and the electromagnetic positioning signal strength variable are calculated, and the weighted sum of the absolute value of the spermman correlation coefficient and the absolute value of the Pearson correlation coefficient is calculated.

[0063] Its expression is: S = β 1 *|SR|+β 2 *|SP|, where SR is the Sperman correlation coefficient, SP is the Pearson correlation coefficient, β 1 is the weight value corresponding to the absolute value of the Sperman correlation coefficient, β 2 is the weight value corresponding to the absolute value of the Pearson coefficient.

[0064] Considering the influence of the change of the independent variable on the dependent variable, that is, the influence of the medium conductivity variable, the dielectric constant or the medium density on the signal strength of the electromagnetic positioning signal.

[0065] Therefore, the weight value corresponding to the absolute value of the Pearson correlation coefficient is smaller than the weight value corresponding to the absolute value of the Sperman correlation coefficient.

[0066] The absolute value of the sperman correlation coefficient corresponds to a weight of 0.72, and the absolute value of the Pearson coefficient corresponds to a weight of 0.28.

[0067] Calculate the weighted sum of the absolute value of the Sperman correlation coefficient and the absolute value of the Pearson coefficient correlation coefficient between all independent variables and the signal strength data of the electromagnetic positioning signal, obtain the independent variable corresponding to the maximum value of the weighted sum of the absolute values, and take the maximum value of the weighted sum of the absolute values ​​as the center, bring the weighted sum of the absolute values ​​between other independent variables and the signal strength data of the electromagnetic positioning signal into the Gaussian distribution, so as to obtain the weight value corresponding to the independent variable.

[0068] It should be noted that the expression of Gaussian distribution used above is: Where S is the weighted sum of the absolute value of the Sperman correlation coefficient and the absolute value of the Pearson coefficient correlation coefficient between a certain independent variable and the signal strength data of the electromagnetic positioning signal, S max It is the maximum weighted sum of the absolute value of the Sperman correlation coefficient and the absolute value of the Pearson coefficient correlation coefficient between the independent variable and the signal intensity data of the electromagnetic positioning signal.

[0069] The weight value corresponding to the independent variable can be obtained by substituting the weighted sum of the absolute value of the spermman correlation coefficient and the absolute value of the Pearson coefficient correlation coefficient between all independent variables and the signal strength data of the electromagnetic positioning signal into the above-mentioned Gaussian distribution function, and then dividing it by the sum of the weighted sum of the absolute value of the spermman correlation coefficient and the absolute value of the Pearson coefficient correlation coefficient between the independent variable and the signal strength of the electromagnetic positioning signal to calculate the value of Mdc.

[0070] The following is an example to illustrate this.

[0071] In the scenario where the cables in the specified area are laid near the underground pipeline, the weight factor value is determined by the above method. In the environment where the cable equipment is laid, it is found that the weighted sum of the absolute values ​​between the dielectric conductivity variable and the signal strength of the electromagnetic positioning signal is the largest, that is, the influence of dielectric conductivity on the positioning accuracy is the most obvious. Because the soil moisture around the underground pipeline varies greatly, the conductivity fluctuation affects the propagation of the electromagnetic positioning signal. The weight factor corresponding to the dielectric conductivity is calculated to be 0.63.

[0072] In this laying environment, the absolute value between the dielectric constant variable and the signal strength of the electromagnetic positioning signal is weighted and the second largest, and the radio frequency signal change caused by the dielectric constant change is within the set acceptance range, so the dielectric constant weight factor is calculated to be 0.21.

[0073] The weight factor corresponding to the medium density is set to 0.16 according to the weight value corresponding to the medium conductivity and the weight value corresponding to the dielectric constant.

[0074] In this way, the cable laying environment analysis module can assign different numerical values ​​to the weight value corresponding to the medium conductivity, the weight value corresponding to the dielectric constant, and the weight value corresponding to the medium density according to the different laying environments where the cable equipment is located and the conditions of the laying environment of the cable equipment, so that the calculated medium positioning adaptation coefficient value is more accurate.

[0075] The cable laying environment analysis module obtains the dielectric positioning interference coefficient corresponding to the laying environment of the faulty cable equipment in the specified area. The specific process is as follows: query the database to obtain the magnetic permeability value range and mechanical vibration frequency value range set before obtaining the dielectric positioning interference parameters corresponding to the laying environment of the cable equipment in the specified area, and record the corresponding maximum and minimum values ​​in the magnetic permeability value range and mechanical vibration frequency value range as Q respectively. max , Q min ;f max , f min .

[0076] The calculation method of the medium positioning interference coefficient corresponding to the cable equipment laying environment is as follows: the magnetic permeability minus the minimum magnetic permeability divided by the difference between the maximum and minimum magnetic permeability values, to obtain the normalized magnetic permeability data; the mechanical vibration frequency minus the minimum mechanical vibration frequency divided by the difference between the maximum and minimum mechanical vibration frequencies, to obtain the normalized mechanical vibration frequency data; the value one is used to subtract the normalized magnetic permeability data and the normalized mechanical vibration frequency data, respectively, to obtain the corrected normalized magnetic permeability data and the corrected normalized mechanical vibration frequency data. The weighted sum of the corrected normalized magnetic permeability data and the corrected normalized mechanical vibration frequency data is obtained and multiplied by the function condition coefficient to obtain the total exponent. The value of the negative total exponential power of the natural logarithm is obtained plus one, and the inverse of the value is obtained to obtain the medium positioning interference coefficient, that is, the Mic value.

[0077] Its expression is: Among them, Q and f represent the magnetic permeability and mechanical vibration frequency corresponding to the cable equipment laying environment in the specified area, respectively, and K 1 and K 2 They are respectively represented as the weight value corresponding to the normalized data of corrected magnetic permeability and the weight value corresponding to the normalized data of corrected mechanical vibration frequency, and γ is the function adjustment coefficient.

[0078] In the process of evaluating the dielectric positioning comprehensive influence coefficient and the dielectric positioning adaptation coefficient of the cable equipment laid in the specified area, the dielectric positioning comprehensive influence coefficient is substituted into the positioning comprehensive influence evaluation expression for analysis, which is conducive to quantifying the impact of complex environmental factors on positioning. Through specific calculations, the difficulty of positioning in different environments can be intuitively seen, rather than relying solely on experience or qualitative judgment, thereby providing scientific guidance for positioning work and improving the success rate of positioning.

[0079] The weights corresponding to the normalized data of the corrected magnetic permeability and the weights corresponding to the normalized data of the corrected mechanical vibration frequency are different in different cable equipment laying environments.

[0080] Because the interference of mechanical vibration frequency and magnetic permeability on the signal strength of electromagnetic positioning signal is different in different environments, in order to improve the accuracy of medium positioning interference coefficient calculation, it is necessary to obtain the data set of magnetic permeability and mechanical vibration frequency of the medium around the cable equipment.

[0081] The specific process is as follows.

[0082] Obtain the magnetic permeability and mechanical vibration frequency of the surrounding environment of the cable equipment from the database, and obtain the signal strength of the corresponding electromagnetic positioning signal. Analyze the impact of different magnetic permeability and mechanical vibration frequency data on the signal strength value of the electromagnetic positioning signal.

[0083] The mechanical vibration frequency is used as the independent variable and the signal strength of the electromagnetic positioning signal is used as the dependent variable. Two sets of data are constructed with the magnetic permeability data as the independent variable and the signal strength of the electromagnetic positioning signal as the dependent variable. Variance analysis is performed on these two sets of data to calculate the F statistic.

[0084] If the F statistic is less than the critical value, the weight value corresponding to the normalized data of the corrected magnetic permeability and the weight value corresponding to the normalized data of the corrected mechanical vibration frequency are assigned 0.5.

[0085] If the F statistic is greater than the critical value, the independent variable is selected, the absolute value of the spermman correlation coefficient and the absolute value of the Pearson correlation coefficient between the independent variable and the electromagnetic positioning signal strength variable are calculated, and the weighted sum of the absolute value of the spermman correlation coefficient and the absolute value of the Pearson correlation coefficient is calculated.

[0086] Considering the influence of the change of the independent variable on the dependent variable, that is, the influence of the magnetic permeability or mechanical vibration frequency on the signal strength of the electromagnetic positioning signal.

[0087] Therefore, the weight value corresponding to the absolute value of the Pearson correlation coefficient is smaller than the weight value corresponding to the absolute value of the Sperman correlation coefficient.

[0088] The absolute value of the sperman correlation coefficient corresponds to a weight of 0.72, and the absolute value of the Pearson coefficient corresponds to a weight of 0.28.

[0089] Calculate the weighted sum of the absolute value of the Sperman correlation coefficient and the absolute value of the Pearson coefficient correlation coefficient between all independent variables and the signal strength data of the electromagnetic positioning signal, obtain the independent variable corresponding to the maximum value of the weighted sum of the absolute values, and bring the weighted sum of the absolute values ​​between other independent variables and the signal strength data of the electromagnetic positioning signal into the Gaussian distribution with the maximum value of the weighted sum of the absolute values ​​as the center, so as to obtain the weight values ​​corresponding to the independent variables, that is, the weight values ​​corresponding to the normalized data of the corrected magnetic permeability and the weight values ​​corresponding to the corrected mechanical vibration frequency, so that the value of the medium positioning interference parameter is more accurate.

[0090] During the working process of the cable equipment laying environment analysis module, when a cable equipment failure occurs in the specified area, analyzing the medium positioning adaptation parameters and the medium positioning interference parameters is helpful to fully understand the characteristics of the cable laying environment. The medium parameters cover the physical properties that have an important influence on positioning. Comprehensive consideration of the medium parameters is conducive to accurately evaluating the impact of the environment on positioning, providing sufficient basis for the subsequent selection of the appropriate positioning mode, and avoiding positioning errors caused by ignoring certain key parameters.

[0091] Before analyzing the positioning mode of the cable equipment, the positioning mode selection module needs to obtain the faulty cable equipment through the data transmission channel to calculate the medium positioning comprehensive influence coefficient of the cable equipment, and determine which positioning mode the cable equipment is in according to the medium positioning comprehensive influence coefficient of the cable. The specific method is as follows.

[0092] A first medium positioning comprehensive influence coefficient threshold, a second medium positioning comprehensive influence coefficient threshold, a third medium positioning comprehensive influence coefficient threshold and a fourth medium positioning comprehensive influence coefficient threshold are obtained from the database.

[0093] According to the obtained medium positioning comprehensive influence coefficient of the cable equipment laying environment in the specified area, the system can select the positioning mode intelligently. Specifically, when the medium positioning comprehensive influence coefficient is greater than the first medium positioning comprehensive influence coefficient threshold, it indicates that the faulty cable equipment in the area should adopt the first type of positioning mode, which is suitable for scenes with less environmental interference and higher positioning accuracy requirements.

[0094] When the comprehensive influence coefficient of medium positioning is greater than the second comprehensive influence coefficient threshold of medium positioning, but less than the first comprehensive influence coefficient threshold of medium positioning, it is necessary to further evaluate whether the medium positioning interference coefficient is greater than the standard medium positioning interference coefficient threshold, so as to determine whether the second type of positioning mode (suitable for scenarios with large environmental interference and general positioning accuracy requirements) or the third type of positioning mode (suitable for scenarios with small environmental interference and general positioning accuracy requirements) should be adopted.

[0095] Finally, when the medium positioning comprehensive influence coefficient is less than the third medium positioning comprehensive influence coefficient threshold, it indicates that the faulty cable equipment in the area should adopt the fourth type of positioning mode, which is suitable for scenes with large environmental interference and low positioning accuracy requirements. Through this hierarchical judgment, the best positioning mode that should be adopted by the faulty cable equipment can be quickly determined based on the actual medium positioning comprehensive influence coefficient, so as to improve the overall positioning system performance and reliability and cope with the positioning difficulties caused by different laying environments.

[0096] In the process of evaluating the corresponding positioning mode for the faulty cable equipment in the specified area, the threshold of the medium positioning comprehensive influence coefficient is obtained from the database, and the positioning mode is determined by comparing the medium positioning interference coefficient with the standard threshold. This is conducive to accurately selecting the mode that best suits the current faulty cable environment from a variety of positioning modes. Through multi-level judgment, it is helpful to finely distinguish the applicability of different types of positioning modes, avoid selecting the wrong positioning mode due to simple judgment, and improve the accuracy and reliability of positioning.

[0097] The faulty cable equipment and the faulty cable equipment assessment module obtain the positioning mode selection module through the data channel to obtain the positioning mode of the faulty cable equipment, and evaluate the standards of the corresponding maintenance materials when the faulty cable equipment is being repaired according to the positioning mode.

[0098] The specific evaluation process is as follows: obtain the standard medium positioning interference coefficient threshold corresponding to the laying environment of the faulty cable equipment in the specified area from the database.

[0099] When the dielectric positioning interference coefficient is greater than or equal to the standard dielectric positioning interference coefficient threshold, it indicates that the dielectric interference of the laying environment corresponding to the faulty cable equipment in the specified area is strong. At this time, it is determined that the corresponding positioning mode used by the faulty cable equipment in the specified area is the positioning mode in the third category. If the dielectric positioning interference coefficient is less than the standard dielectric positioning interference coefficient threshold, it indicates that the dielectric interference of the laying environment corresponding to the faulty cable equipment in the specified area is weak. At this time, it is determined that the corresponding positioning mode used by the faulty cable equipment in the specified area is the positioning mode in the fourth category.

[0100] The specific process of evaluating the standard of repair materials used when repairing faulty cable equipment is as follows: when determining the corresponding positioning mode used for the faulty cable equipment in the specified area, the corresponding standards of repair materials used after using each type of positioning mode are obtained from the database according to the type of the positioning mode used. When the corresponding positioning mode used for the faulty cable equipment in the specified area is a positioning mode in the first category, it indicates that the standard of repair materials used when repairing the faulty cable equipment in the specified area is the first repair material standard, thereby determining the standard of repair materials used when repairing the faulty cable equipment in the specified area.

[0101] It should be noted that the maintenance material standards include but are not limited to the electromagnetic properties, mechanical properties and environmental resistance of the materials, such as the shielding effectiveness of electromagnetic shielding materials, the strength and toughness of vibration-resistant materials, and corrosion resistance. For example, for cable maintenance in the first type of positioning mode, if it is in an environment with large electromagnetic interference and humidity, the maintenance material standard is high shielding effectiveness and corrosion-resistant metal materials.

[0102] The database is used to store the environmental information of the laying of cable equipment, and also stores the magnetic permeability value range and mechanical vibration frequency value range set before obtaining the dielectric positioning interference parameters corresponding to the laying environment of the cable equipment in the specified area, and also stores the standard dielectric positioning interference coefficient threshold corresponding to the laying environment of the faulty cable equipment in the specified area, and also stores the standards of various maintenance materials used after using various types of positioning modes, and also stores the thresholds of various dielectric positioning comprehensive influence coefficients of the laying environment corresponding to each positioning mode when the cable equipment fails.

[0103] The cable equipment laying environment analysis module, positioning mode selection module, fault cable equipment assessment module, and multi-mode positioning classification module are deployed remotely. Since the amount of new data generated by cable equipment every day is large, the cable equipment laying environment analysis module and multi-mode positioning classification module are deployed closer to the database.

[0104] A data channel is provided between the database and the cable equipment laying environment analysis module, the positioning mode selection module, the faulty cable equipment assessment module and the multi-mode positioning classification module. When the cable equipment laying environment analysis module, the positioning mode selection module and the faulty cable equipment assessment module request data from the database, the database authenticates the request sent by the cable equipment laying environment analysis module, the positioning mode selection module and the faulty cable equipment assessment module. The specific authentication process is that the cable equipment laying environment analysis module, the positioning mode selection module and the faulty cable equipment assessment module use the public key of the database to sign the data request when sending the data request. When the database receives the data requests of these modules, it uses the private key to verify the signature of the data requests of these modules. If the signature verification is successful, the corresponding data is sent to the corresponding module according to the data request; if the signature verification is unsuccessful, the received data request is rejected.

[0105] In this system, there is a data channel between the database and the cable equipment laying environment analysis module, positioning mode selection module, faulty cable equipment assessment module and multi-mode positioning classification module. In order to ensure the security and integrity of the data, the public key encryption and digital signature mechanism is adopted in the data request and transmission process.

[0106] When each module sends a data request to the database, it will first use the public key provided by the database to sign the requested data. After receiving the request, the database will use its own private key to verify the signature. Only when the signature verification is successful will the database return the corresponding data to the requester. This mechanism effectively prevents data from being tampered with or counterfeited during transmission, avoiding the risk of data leakage.

[0107] Another important function of this security mechanism is to prevent the data in the database from being tampered with or forged data from being injected, which would affect the subsequent fault diagnosis and maintenance efficiency of cable equipment. Even if the data in the database is damaged, the signature verification mechanism can detect the problem in time and prevent the wrong data from being misused.

[0108] During the data transmission process between the cable equipment laying environment analysis module, the positioning mode selection module, the faulty cable equipment assessment module and the multi-mode positioning classification module, the identities of each other are mutually authenticated. To illustrate, when the positioning mode selection module sends the medium positioning comprehensive influence coefficient to the cable equipment laying environment analysis module through the data transmission channel, the request and the signature of the request are sent to the cable equipment laying environment analysis module. After the cable equipment laying environment analysis module receives the request and successfully verifies the signature, it sends a confirmation request and (the confirmation request includes the data of the medium positioning comprehensive influence coefficient) and the signature of the confirmation request to the positioning mode analysis module. After the positioning mode analysis module successfully verifies the signature, the data is used for subsequent positioning mode selection.

[0109] Through this mechanism, the safety and reliability of the cable equipment positioning and fault diagnosis system are further improved.

[0110] When the positioning mode selection module needs to obtain the medium positioning comprehensive influence coefficient from the cable equipment laying environment analysis module, it not only needs to transmit the data itself, but also needs to attach the signature of the request. After receiving the request, the cable equipment laying environment analysis module will first use the public key of the positioning mode selection module to verify the signature and confirm the legitimacy of the request. Only when the signature verification is successful, the analysis module will return the confirmation request and the corresponding data, and attach the signature of the confirmation request.

[0111] After receiving this data, the positioning mode selection module will also use the public key of the cable equipment laying environment analysis module to verify the signature of the confirmation request. Only when all signature verifications pass in this process will the positioning mode selection module trust and use this data for subsequent positioning mode selection.

[0112] This mutual identity authentication mechanism can effectively avoid attacks from counterfeit modules or devices, and prevent erroneous information from being mistakenly entered into the positioning system, which would lead to deviations in the judgment of the cable equipment positioning mode. This not only ensures the security of data transmission, but also improves the reliability and robustness of the entire system, ensuring accurate positioning and efficient maintenance of cable equipment.

[0113] Embodiment 2, this embodiment discloses a method for locating a cable device, referring to Figure 2 , the steps of the method are as follows.

[0114] S1. Call the multi-mode positioning classification module to obtain the quality information corresponding to the cable equipment and the relevant data of the laying environment of the cable equipment, and classify each mode according to the classification standard based on these data.

[0115] S2. Calling the cable equipment laying environment analysis module to obtain the weight values ​​corresponding to the independent variables of the medium positioning adaptation parameters and the medium positioning interference parameters, thereby obtaining the medium positioning adaptation parameters and the medium positioning interference parameters of the cable equipment.

[0116] S3. Calling the positioning selection module, the positioning selection module obtains the medium positioning comprehensive influence coefficient corresponding to the cable equipment of the cable equipment laying environment analysis module through the data transmission channel, and analyzes the positioning mode corresponding to the cable equipment according to the obtained medium positioning comprehensive influence coefficient.

[0117] S4. Call the faulty cable equipment assessment module, obtain the positioning selection mode judgment result of the positioning selection module for the faulty cable equipment through the data transmission channel, and evaluate the standard of materials used in the repair process of the faulty cable equipment according to the judgment result.

[0118] In step S3, a first threshold, a second threshold, a third threshold and a fourth threshold are set. According to the comprehensive influence coefficient of the medium positioning of the cable equipment laying environment, we can adopt an adaptive positioning mode selection strategy. Specifically, when the comprehensive influence coefficient of the medium positioning of the faulty cable equipment is greater than 0 and less than the first threshold, the first positioning mode should be adopted. This mode is suitable for scenes with small environmental interference and high positioning accuracy requirements. When the comprehensive influence coefficient of the medium positioning is greater than the first threshold and less than the second threshold, the second positioning mode should be adopted. This mode is suitable for scenes with large environmental interference but general positioning accuracy requirements. If the comprehensive influence coefficient of the medium positioning is greater than the second threshold and less than the third threshold, the third positioning mode should be adopted. This mode is suitable for scenes with small environmental interference but general positioning accuracy requirements. Finally, when the comprehensive influence coefficient of the medium positioning is greater than the third threshold and less than the fourth threshold, the fourth positioning mode should be adopted. This mode is suitable for scenes with large environmental interference and low positioning accuracy requirements.

[0119] By setting different thresholds for the comprehensive influence coefficient of medium positioning, we can quickly select the most appropriate positioning mode according to the actual environmental conditions, thereby improving the performance and reliability of the entire cable fault positioning system.

[0120] During the working process of the multi-mode positioning classification module, the positioning modes are divided into four types by obtaining the environmental information of the cable equipment laying from the database and setting the classification standards as strong medium adaptability, strong resistance to external interference, weak medium adaptability and weak resistance to external interference. This is conducive to quickly and accurately screening out the most suitable positioning mode when facing different cable laying environments. In an environment with strong medium adaptability and strong resistance to interference, the first type of positioning mode is given priority to ensure the accuracy and efficiency of positioning. The complex medium conditions and interference factors in the actual environment are taken into account, avoiding the problem of failure of a single mode in certain special environments, and greatly improving the adaptability of the entire positioning system to different environments.

[0121] The present invention deeply explains its purpose, technical scheme and beneficial effects through specific embodiments, but these embodiments are only used as examples to show the application mode of the invention and do not constitute a limitation on the protection scope of the present invention. We explicitly point out that any reasonable modification, equivalent substitution or technical improvement under the guidance of the spirit and principles of the present invention should be included in the protection scope of the present invention. This means that as long as these changes do not deviate from the core idea and basic function of the invention, they should be protected by patent rights. The scope of protection of the present invention should be broad, including all direct and obvious variants and non-obvious innovations that technical experts can reasonably deduce based on the disclosure of the present invention. This broad protection is intended to promote further research and development based on the present invention, while ensuring that its innovation and practicality are fully protected by law.

Claims

1. A multi-mode positioning system for cable equipment, characterized in that: The positioning mode selection module obtains the medium positioning comprehensive influence coefficient of the cable equipment through the cable equipment laying environment analysis module and selects the positioning mode; the faulty cable equipment evaluation module obtains the positioning mode of the cable equipment through the positioning mode selection module and selects the maintenance materials of the cable equipment.

2. A cable equipment multi-mode positioning system according to claim 1, characterized in that: The cable equipment laying environment analysis module obtains the medium positioning adaptation parameters and medium positioning interference parameters corresponding to the cable equipment laying environment through a database, and then obtains the medium positioning comprehensive influence coefficient of the cable equipment.

3. A cable equipment multi-mode positioning system according to claim 1, characterized in that: The positioning mode selection module obtains the dielectric positioning comprehensive influence coefficient of the cable equipment, determines the value range interval through the dielectric positioning comprehensive influence coefficient of the cable equipment; searches the database for the corresponding positioning mode according to the value range interval to determine the positioning mode of the cable equipment.

4. A cable equipment multi-mode positioning system according to claim 1, characterized in that: The faulty cable equipment evaluation module obtains the positioning mode of the cable equipment, and searches for maintenance materials corresponding to the positioning mode of the cable equipment in a database according to the positioning mode of the cable equipment.

5. A cable equipment multi-mode positioning system according to any one of claims 2 to 4, characterized in that: The cable equipment laying environment analysis module, the positioning mode selection module and the faulty cable equipment evaluation module are all connected to the database.

6. A cable equipment multi-mode positioning system according to any one of claims 1 to 4, characterized in that: The cable equipment laying environment analysis module is connected to the positioning mode selection module via a data transmission channel, and the cable equipment laying environment analysis module sends the medium comprehensive influence coefficient of the cable equipment to the positioning mode selection module via the data transmission channel.

7. A cable equipment multi-mode positioning system according to any one of claims 1 to 4, characterized in that: The positioning mode selection module is connected to the faulty cable equipment evaluation module through a data transmission channel, and the positioning mode selection module sends the positioning mode of the cable equipment to the faulty cable equipment evaluation module through the data transmission channel.

8. A cable equipment multi-mode positioning system according to any one of claims 1 to 4, characterized in that: The system also includes a multi-mode positioning classification module; the multi-mode positioning classification module obtains the quality information corresponding to each positioning mode and the laying environment of the cable equipment, and then classifies each positioning mode according to a set classification standard.

9. A multi-mode positioning method for cable equipment, characterized in that: The steps include: S1, calling the multi-mode positioning classification module to classify the positioning modes of the cable equipment; S2, calling the cable equipment laying environment analysis module to obtain the medium positioning comprehensive influence coefficient of the faulty cable equipment, and sending the medium positioning comprehensive influence coefficient to the positioning mode selection module through the data channel; S3, calling the positioning selection module, selecting the positioning mode according to the obtained medium positioning comprehensive influence coefficient, and sending the information of the positioning mode to the fault cable equipment evaluation module through the data channel; S4. Calling a faulty cable equipment assessment module to find maintenance materials corresponding to the faulty cable equipment through the information of the acquired positioning mode.

10. A cable equipment multi-mode positioning method according to claim 9, characterized in that: In step S2, if the medium positioning comprehensive influence coefficient of the faulty cable device is greater than zero and less than a first threshold, the positioning mode of the faulty cable device is the first positioning mode; If the medium positioning comprehensive influence coefficient of the faulty cable device is greater than the first threshold value and less than the second threshold value, the positioning mode of the faulty cable device is the second positioning mode; If the medium positioning comprehensive influence coefficient of the faulty cable device is greater than the second threshold value and less than the third threshold value, the positioning mode of the faulty cable device is the third positioning mode; If the medium positioning comprehensive influence coefficient of the faulty cable device is greater than the third threshold and less than the fourth threshold, the positioning mode of the faulty cable device is the fourth positioning mode.

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