Method and system for replacing a catenary cable of an overhead contact system of a high-speed railway

Abstract

The application belongs to the technical field of high-speed railway catenary maintenance, and particularly relates to a method and system for replacing a high-speed railway catenary elastic chain-shaped suspension's load-bearing cable. The method comprises obtaining the axial length and the radial size of the load-bearing cable, obtaining the initial radial size, the initial distance between the first mark point and the second mark point, the distance between the first mark point and the second mark point of the current load-bearing cable, external dynamic interference factors and the radial size, outputting the external dynamic interference factors into a target dynamic interference compensation model to obtain the current mark point distance, dynamic interference compensation data and the radial size, generating the final distance according to the current mark point distance and the current dynamic interference compensation data, comparing the final distance with the initial distance to determine the mark point distance difference, calculating the difference value according to the current radial size to obtain the reference factor for replacing the load-bearing cable. The dynamic mark point distance monitoring and multi-factor interference compensation model is constructed to realize the quantification of the axial extensibility deformation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high-speed railway catenary maintenance, and particularly relates to a method and system for replacing a load-bearing cable of a high-speed railway catenary elastic chain suspension. BACKGROUND

[0002] In a high-speed railway catenary system, the load-bearing cable in the elastic chain suspension structure is subjected to dynamic mechanical load and environmental influence for a long time. Existing load-bearing cable state monitoring technology mainly relies on periodic manual inspection or one-dimensional measurement of vehicle-mounted detection equipment.

[0003] Traditional detection methods generally focus on the evaluation of radial size changes, but cannot effectively quantify axial ductility deformation.

[0004] Therefore, there is an urgent need for a method and system for replacing a load-bearing cable of a high-speed railway catenary elastic chain suspension. SUMMARY

[0005] Therefore, it is necessary to provide a method and system for replacing a load-bearing cable of a high-speed railway catenary elastic chain suspension to solve the above technical problems.

[0006] In a first aspect, the application provides a method for replacing a load-bearing cable of a high-speed railway catenary elastic chain suspension, the method comprising:

[0007] obtaining an axial length and a radial size of the load-bearing cable, arranging a mark point at a preset distance based on the axial length, and obtaining an initial radial size, an initial distance between a first mark point and a second mark point, and a distance between the first mark point and the second mark point;

[0008] training an initial dynamic interference compensation model using historical external dynamic interference factors to obtain a target dynamic interference compensation model, wherein the historical external dynamic interference factors include data of vibration interference, temperature interference, and wind disturbance swing;

[0009] obtaining a distance between the first mark point and the second mark point, external dynamic interference factors, and a radial size of the current load-bearing cable, inputting the external dynamic interference factors into the target dynamic interference compensation model, and obtaining a current mark point distance, current dynamic interference compensation data, and a current radial size;

[0010] comparing the current mark point distance and the current dynamic interference compensation data to generate a final distance, and comparing the final distance with the initial distance to determine a mark point distance difference value;

[0011] calculating a difference value according to the mark point distance difference value and the current radial size to obtain a reference factor for replacing the load-bearing cable.

[0012] In some embodiments, the step of obtaining the axial length and the radial dimension of the bearing cable, and arranging the mark points at a preset distance based on the axial length to obtain the initial radial dimension and the initial distance between the first mark point and the second mark point, comprises:

[0013] obtaining the axial length and the radial dimension of the bearing cable between the two columns to obtain the initial axial length and the initial radial dimension;

[0014] arranging the mark points at a preset distance based on the initial axial length to obtain at least the first mark point and the second mark point;

[0015] obtaining the initial distance based on the first mark point and the second mark point.

[0016] In some embodiments, the step of training the initial dynamic disturbance compensation model using the historical external dynamic disturbance factors to obtain a target dynamic disturbance compensation model comprises:

[0017] in a test field, simulating vehicle speed and vibration, obtaining the morphological changes of the bearing cable under different speeds and vibrations to obtain vibration disturbance data;

[0018] in a test field, simulating temperature changes, obtaining the morphological changes of the bearing cable under different temperatures to obtain temperature disturbance data;

[0019] in a test field, simulating wind speed and direction, obtaining the morphological changes of the bearing cable under different wind speeds and directions to obtain wind disturbance swing data;

[0020] combining the vibration disturbance, temperature disturbance, and wind disturbance swing data with the corresponding morphological changes of the bearing cable to obtain the historical external dynamic disturbance factors;

[0021] constructing an initial dynamic disturbance compensation model and training the initial dynamic disturbance compensation model using the historical external dynamic disturbance factors as training data to obtain a target dynamic disturbance compensation model.

[0022] In some embodiments, the step of obtaining the distance between the first mark point and the second mark point of the current bearing cable, the external dynamic disturbance factors, and the radial dimension, and inputting the external dynamic disturbance factors into the target dynamic disturbance compensation model to obtain the current mark point distance, the current dynamic disturbance compensation data, and the current radial dimension, comprises:

[0023] using a laser scanner to obtain the distance between the first mark point and the second mark point of the current bearing cable and the radial dimension to obtain the current mark point distance and the current radial dimension;

[0024] Obtain the data of vibration interference, temperature interference and wind interference swing of the current bearing cable location, and form the external dynamic interference factors to obtain the current dynamic interference compensation data.

[0025] In some implementable manners, the step of generating a final distance according to the current marker point distance and the current dynamic interference compensation data, and comparing the final distance with the initial distance to determine a marker point distance difference value includes:

[0026] Perform difference calculation using the current marker point distance and the current dynamic interference compensation data to generate a final distance.

[0027] Compare the final distance with the initial distance to perform difference calculation and determine a marker point distance difference value.

[0028] In some implementable manners, the step of calculating a difference value according to the marker point distance difference value and the current radial size to obtain a reference factor for replacing the bearing cable includes:

[0029] According to the marker point distance difference value and the current radial size, compare with the standard information of bearing cable replacement to calculate a difference value and obtain a bearing cable replacement time interval.

[0030] Take the bearing cable replacement time interval as the reference factor for replacing the bearing cable.

[0031] In some implementable manners, the step of comparing the marker point distance difference value and the current radial size with the standard information of bearing cable replacement to calculate a replacement time and obtain a bearing cable replacement time interval includes:

[0032] According to the initial state of the bearing cable, the time required to reach the current marker point distance difference value and the current radial size, obtain a change function.

[0033] According to the change function and the difference information, predict the bearing cable replacement time interval.

[0034] In a second aspect, the application provides a bearing cable replacement system for a high-speed railway catenary elastic chain suspension, which is applied to the method described above, and the system includes:

[0035] A first acquisition unit is configured to acquire the axial length and the radial size of the bearing cable, arrange marker points at intervals of a preset distance based on the axial length, and correspondingly obtain an initial radial size, an initial distance between a first marker point and a second marker point.

[0036] A model unit is configured to train an initial dynamic interference compensation model by using historical external dynamic interference factors to obtain a target dynamic interference compensation model, wherein the historical external dynamic interference factors include data of vibration interference, temperature interference and wind disturbance swing;

[0037] A second acquisition unit is configured to acquire a distance between the first marker point and the second marker point of a current load-bearing cable, external dynamic interference factors and a radial size, input the external dynamic interference factors into the target dynamic interference compensation model, and correspondingly obtain a current marker point distance, current dynamic interference compensation data and a current radial size;

[0038] A comparison unit is configured to generate a final distance according to the current marker point distance and the current dynamic interference compensation data, compare the final distance with the initial distance, and determine a marker point distance difference value;

[0039] A result unit is configured to calculate a difference value according to the marker point distance difference value and the current radial size, and obtain a reference factor for replacing the load-bearing cable.

[0040] In a third aspect, a computer storage medium is provided, and the computer storage medium stores a computer program. When the computer program is executed by a processor, the steps of the method described above are implemented.

[0041] In a fourth aspect, a computer program is provided. When the computer program is executed by a processor, the steps of the method described above are implemented.

[0042] Beneficial effects: the application provides a method for replacing a catenary cable of an elastic chain suspension of a high-speed railway overhead contact system, which comprises obtaining an axial length and a radial dimension of the catenary cable, arranging mark points at intervals of a preset distance based on the axial length, and obtaining an initial radial dimension and an initial distance between a first mark point and a second mark point; training an initial dynamic interference compensation model by using historical external dynamic interference factors, and obtaining a target dynamic interference compensation model, wherein the historical external dynamic interference factors include data of vibration interference, temperature interference, and wind disturbance swing; obtaining a distance between the first mark point and the second mark point of the current catenary cable, external dynamic interference factors, and a radial dimension, inputting the external dynamic interference factors into the target dynamic interference compensation model, and obtaining a current mark point distance, current dynamic interference compensation data, and a current radial dimension; comparing a final distance generated according to the current mark point distance and the current dynamic interference compensation data with the initial distance, and determining a mark point distance difference value; calculating a difference value according to the mark point distance difference value and the current radial dimension, and obtaining a reference factor for replacing the catenary cable. By the above method, a dynamic mark point distance monitoring and multi-factor interference compensation model is constructed, axial extensibility deformation is quantified, radial dimension changes are calibrated in real time by combining laser scanning, axial / radial degradation coupling characteristic values are synchronously output under continuous operation conditions, service life quantification basis is directly generated, passive artificial sampling inspection is upgraded to a full-life dynamic early warning system, and the risk of overhead contact system paralysis caused by axial fracture is eliminated. BRIEF DESCRIPTION OF DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description only represent some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0044] Figure 1 A flowchart of a method for replacing a catenary cable of an elastic chain suspension of a high-speed railway overhead contact system in an embodiment.

[0045] Figure 2 A high-speed railway overhead contact system chain suspension catenary cable replacement flowchart of a method for replacing a catenary cable of an elastic chain suspension of a high-speed railway overhead contact system in an embodiment. DETAILED DESCRIPTION

[0046] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The drawings show embodiments of the present application. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0048] It is to be understood that the terms "first", "second", and the like, used herein do not connote any hierarchy or order, but are used to distinguish one element from another.

[0049] In the overhead line system of high-speed railway, the load-bearing cable in the catenary suspension structure is subjected to dynamic mechanical load and environmental influence for a long time. The laser equipment can be used for radial scanning to determine the condition of the load-bearing cable. This single-dimensional detection mode makes it difficult to completely capture the full life cycle state of material fatigue, especially the axial plastic accumulation effect under alternating stress is often ignored. Engineering practice shows that the influence of axial deformation on the failure mode of the load-bearing cable is as important as radial wear, and the one-sidedness of the current technical framework may cause misjudgment of safety hazards.

[0050] The dynamic measurement environment further amplifies the technical limitations. The mechanical vibration generated by the train running, the line swing caused by the lateral wind load, and the thermal expansion effect caused by the environmental temperature fluctuation form a multi-physical field coupling interference. The current lacks adaptive compensation mechanism for these complex working conditions, resulting in systematic deviation of the measurement data. Especially in the high-speed mobile detection scene, the superposition effect of multiple source interferences significantly reduces the axial positioning accuracy and the reliability of radial size measurement.

[0051] Therefore, there is an urgent need for a method and system for replacing the load-bearing cable of the catenary suspension of the overhead line system of high-speed railway to solve the above technical problems.

[0052] As shown in Figure 1 The first aspect of the present application provides a method for replacing the load-bearing cable of the catenary suspension of the overhead line system of high-speed railway, comprising:

[0053] S100, obtaining the axial length and the radial size of the load-bearing cable, arranging a mark point at a preset distance based on the axial length, and obtaining the initial radial size and the initial distance between the first mark point and the second mark point.

[0054] Specifically, obtaining the initial radial size and the initial distance between the first mark point and the second mark point can include the following steps:

[0055] S101, obtain the axial length and the radial size of the bearing cable between two pillars, to obtain an initial axial length and an initial radial size.

[0056] Specifically, in the initial state of the bearing cable, the laser equipment can be used to measure the axial length of the bearing cable, and the total length of the bearing cable between two anchor pillars can be obtained.

[0057] For the radial size of the bearing cable, it can be obtained according to the factory identification of the bearing cable, or it can be measured on the construction site.

[0058] S102, according to the initial axial length, the mark points are arranged at intervals of a preset distance, and at least a first mark point and a second mark point are obtained.

[0059] Specifically, according to the initial axial length, the density of the reference arrangement point is calculated, and the density can be an integer according to the length of the bearing cable, for example, between two anchor pillars at intervals of 50 meters, 5 equal parts are split. In this way, when two anchor pillars are used as mark points, 4 mark points are arranged between the two anchor pillars, so that the initial axial length can be equally divided into 5 parts with a length of 10 meters.

[0060] It should be noted that the mark point can be a ceramic mark point, an RFID mark point, etc., so as to avoid the influence of the external environment on the mark point for a long time, for example, the mark point sprayed is easy to be corroded and damaged.

[0061] S103, according to the first mark point and the second mark point, an initial distance is obtained.

[0062] Under constant temperature and windless conditions, coordinate points are recorded one by one, and the first mark point and the second mark point are only exemplary to illustrate that the number of mark points is determined according to the axial length, and the number of mark points is not limited in the application.

[0063] S200, using historical external dynamic interference factors, training an initial dynamic interference compensation model to obtain a target dynamic interference compensation model.

[0064] The historical external dynamic interference factors include vibration interference, temperature interference, and wind disturbance swing data.

[0065] Specifically, obtaining the target dynamic interference compensation model can include the following steps:

[0066] S201, in the test field, simulate the vehicle speed and vibration, obtain the shape change of the bearing cable under different speeds and vibrations, and obtain the vibration interference data.

[0067] Specifically, in the laboratory environment, a database of different speeds, vibrations and bearing cable vibration response relationships is obtained.

[0068] wherein, the speed refers to the speed of the simulation vehicle; the vibration refers to the vibration of the simulation vehicle; the speed, the vibration and the vibration of the bearing cable are constructed into a linear relationship, a database is formed which establishes a response relationship with the vibration of the bearing cable, and vibration interference data is formed as training data for the target dynamic interference compensation model. It can be understood that the linear relationship refers to the mapping from input to output through a first-order polynomial, which covers global linearization or piecewise linear approximation scheme.

[0069] S202, in the test field, simulate temperature change, obtain the shape change of the bearing cable under different temperatures, and obtain the temperature interference data.

[0070] Specifically, in the laboratory environment, a segmented temperature control wind tunnel is used to uniformly heat or cool the bearing cable, so as to obtain the shape change of the bearing cable under different temperatures, and form a database of the response relationship between temperature and deformation, thereby obtaining the temperature interference data.

[0071] S203, in the test field, simulate wind speed and direction, obtain the shape change of the bearing cable under different wind speed and direction, and obtain the wind interference swing data.

[0072] Specifically, in the laboratory environment, a multi-directional adjustable wind speed is deployed to act on the bearing cable, the shape change of the bearing cable is determined, and a database of the response relationship between wind speed and bearing cable shape change is formed, thereby obtaining the wind interference swing data.

[0073] S204, using the vibration interference, temperature interference and wind interference swing data, and the corresponding shape change of the bearing cable, combination is performed to obtain the historical external dynamic interference factors.

[0074] In the foregoing steps, after obtaining the vibration interference, temperature interference and wind interference swing data, these data are traversed and combined, that is, each group of data includes vibration interference, temperature interference and wind interference swing data, thereby obtaining the historical external dynamic interference factors.

[0075] S205, an initial dynamic interference compensation model is constructed, and the historical external dynamic interference factors are used as training data for training to obtain the target dynamic interference compensation model.

[0076] Specifically, a nonlinear mapping from input (interference parameter) to output (deformation deviation) is established, and the training mechanism is exemplarily:

[0077] Input layer: three-dimensional interference vector [vibration, temperature, wind]; perform regular necessary physical constraints.

[0078] The output layer is an axial coordinate compensation amount AL, wherein the axial coordinate compensation amount AL refers to a deformation offset component of the axial direction of the cable.

[0079] The axial coordinate compensation amount AL is physically affected by material thermal expansion characteristics, aerodynamic forces, and gravity fields, which can affect the final measurement accuracy.

[0080] AL = vibration interference + temperature interference + wind interference swing. AL is the adjustment amount of the actual distance.

[0081] First, a virtual physical court is constructed, and the laboratory simulation generated temperature, wind, and vibration are taken as evidence chains, and the axial deviation of the cable captured by the laser scanner is regarded as the objective truth. The training process follows the dual constraints of physical laws and data evidence and multiple cross-validation to determine the responsibility proportion of each interference factor to the axial deviation.

[0082] These data are applied to the initial dynamic interference compensation model for training, and the target dynamic interference compensation model is finally obtained.

[0083] S300, obtaining the distance between the first marker point and the second marker point of the current cable, the external dynamic interference factor, and the radial size, and inputting the external dynamic interference factor into the target dynamic interference compensation model to obtain the current marker point distance, the current dynamic interference compensation data, and the current radial size.

[0084] Specifically, obtaining the current marker point distance, the current dynamic interference compensation data, and the current radial size can include the following steps:

[0085] S301, using a laser scanner to obtain the distance between the first marker point and the second marker point of the current cable, and the radial size, to obtain the current marker point distance and the current radial size.

[0086] Specifically, a laser scanner is used to emit a fan-shaped laser beam to cover the cable cross section, and the three-dimensional distance can be captured in real time through the triangulation principle.

[0087] Marker point distance: identify the marker point reflection center embedded in the cable and calculate the three-dimensional Euclidean distance;

[0088] Radial size: sampling every 0.5° along the circumferential direction, and fitting the minimum circumscribed circle diameter.

[0089] It should be noted that the position of the marker point and the radial size can be determined by using one laser scanner, which saves equipment cost. The laser scanner can be arranged on the train, such as the roof of the train, so that data can be collected during the train journey.

[0090] S302, obtain the data of vibration interference, temperature interference and wind interference swing of the current cable location, form the external dynamic interference factors, and obtain the current dynamic interference compensation data.

[0091] Exemplarily, for the data collection of temperature interference, a gyro-stabilized infrared thermal imager (FLIR x8580sc) can be used to measure the surface temperature field of the cable in a non-contact manner, and the gimbal can compensate the pointing angle in real time according to the vehicle body shaking.

[0092] For the data collection of vibration interference, a vibration sensor can be installed on the vehicle to collect the vibration of the vehicle, and the vibration of the cable can be determined according to the linear relationship with the vibration of the cable, and the deviation from the true value, i.e. the interference.

[0093] For the data collection of wind interference swing, a barrel-type ultrasonic anemometer (Vaisala WXT536) can be extended by a preset distance on the roof of the vehicle to avoid or reduce the influence of the vehicle flow.

[0094] It should be noted that the data of vibration interference, temperature interference and wind interference swing of the current cable location are collected as the external dynamic interference factors of the adjacent marker points, and finally the current dynamic interference compensation data is formed.

[0095] S400, generate the final distance according to the current marker distance and the current dynamic interference compensation data, and compare it with the initial distance to determine the marker distance difference.

[0096] Specifically, determining the marker distance difference can include the following steps:

[0097] S401, use the current marker distance and the current dynamic interference compensation data to perform difference calculation to generate the final distance.

[0098] S402, compare the final distance with the initial distance to perform difference calculation and determine the marker distance difference.

[0099] Specifically, in the foregoing step, the distance between the first marker point and the second marker point is measured by the laser scanner to obtain the current marker distance, but this distance can be affected by the deformation or action of the cable. That is, the laser scanner scans the first marker point to obtain the position of the first marker point, and then scans the second marker point after a period of time (the time of vehicle walking), thereby obtaining the position of the second marker point. Therefore, there is a time difference in the formation of the first marker point and the second marker point, and this time difference will affect the judgment of the size of the cable. This is why the current dynamic interference compensation data is calculated in the foregoing step.

[0100] After the current dynamic interference compensation data and the current marker distance between two markers are obtained in the foregoing steps, difference calculation is needed, and whether to add or subtract is determined according to the specific value of the current dynamic interference compensation data.

[0101] The current dynamic interference compensation data is calculated by the target dynamic interference compensation model.

[0102] It should be noted that the data of vibration interference, temperature interference and wind disturbance swing are related to the data measured by the laser scanner, and have a linear correlation, so that the correlation is calculated by a large amount of historical data through experiments in the foregoing steps to obtain the target dynamic interference compensation model. At this point, the current marker distance and the current dynamic interference compensation data are subjected to difference calculation, which is equivalent to adjusting the length of the current marker distance, that is, the measurement length of the axial distance of the cable, so that the measurement length is closer to the true value.

[0103] Next, the final distance is further subjected to difference calculation with the initial distance to determine whether the distance difference between adjacent markers is within the compliance range.

[0104] It should be noted that the current marker distance is calculated based on two markers, and the sum of two distances can also be calculated based on three markers, and compared with the ideal or initial distance. It can be understood that the initial distance also refers to two distances, that is, the initial distance is the length corresponding to the current marker distance, and should not be understood as the distance between two anchor columns.

[0105] It should be further noted that since the vehicle is fast during the form process, the collected data can be stored, and a time stamp is formed during storage, so that the current marker distance and the current dynamic interference compensation data are calculated according to the time stamp. In this way, the pressure on the calculation server can be reduced.

[0106] S500, calculating the replacement time according to the marker distance difference and the current radial size to obtain a reference factor for replacing the cable.

[0107] Specifically, obtaining the reference factor for replacing the cable can include the following steps:

[0108] S501, comparing the marker distance difference and the current radial size with the standard information of cable replacement to calculate a difference value and obtain a cable replacement time interval.

[0109] Specifically, the force cable replacement is corresponding to a standard value, that is, the distance difference between the current marking point of the force cable and the current radial size is compared with the standard information of the force cable replacement, and the difference is calculated to obtain the difference in the axial and radial directions of the force cable replacement. According to the difference in the axial and radial directions, the force cable replacement time interval is obtained. Further, the force cable replacement time interval can be inferred from the difference between the axial and radial directions and the standard value.

[0110] It should be noted that obtaining the force cable replacement time interval can include the following steps:

[0111] S5011, obtaining a change function according to the initial state of the force cable, the time required to reach the current marking point distance difference and the current radial size.

[0112] S5012, predicting the force cable replacement time interval according to the change function and the difference information.

[0113] Specifically, the initial state of the force cable is obtained first. Next, the current marking point distance difference of the force cable obtained in the foregoing step is compared with the value corresponding to the initial state of the force cable, that is, the current value in the axial and radial directions, to obtain the difference in the axial and radial directions. Next, the time stamp of the information collected in the foregoing step is compared with the time when the force cable is first assembled to determine the time difference.

[0114] According to the difference in the axial and radial directions and the time difference, a change function is constructed.

[0115] According to the change function, the current axial and radial sizes are taken as the initial state, and the standard value of the force cable replacement is substituted into the change function to predict the force cable replacement time interval.

[0116] S502, taking the force cable replacement time interval as a reference factor for replacing the force cable.

[0117] Specifically, after obtaining the force cable replacement time interval in the foregoing step, the time interval can be taken as one of the reference factors for replacing the force cable.

[0118] In one embodiment, the step of constructing a change function according to the difference in the axial and radial directions and the time difference further includes:

[0119] Obtaining the service life of the force cable and the target section train daily passing frequency of the force cable;

[0120] respectively, to obtain an axial weight and a radial weight, wherein the axial weight is negatively correlated with the service life, and the radial weight is positively correlated with the target section train daily average passing frequency;

[0121] According to the axial weight and the radial weight, an adjustment coefficient is established and added to the change function to obtain a target change function.

[0122] In the above steps, the adjustment coefficient is added to the change function to make the prediction of the cable replacement time interval more accurate.

[0123] It should be noted that the weight distribution table can be constructed in advance for the service life and the target section train daily average passing frequency, and the axial and radial weights are respectively distributed according to the weight distribution table.

[0124] In a method for replacing a catenary cable of a high-speed railway catenary elastic chain suspension, if it is determined that the catenary cable needs to be replaced, the catenary cable of the high-speed railway catenary elastic chain suspension can be replaced, as shown in the following flowchart: Figure 2 The construction process steps are as follows:

[0125] Construction process steps

[0126] 1. Construction preparation: preliminary work arrangement and material preparation.

[0127] 2. Wait for orders, check electricity and ground: receive construction instructions, complete electricity checking and grounding operation.

[0128] 3. Unload tension, remove the catenary cable, and remove the electrical connection: release the tension, and remove the old catenary cable and electrical connection components.

[0129] 4. Catenary cable anchoring: the starting end of the new catenary cable is fixed.

[0130] 5. Catenary cable erection: lay the new catenary cable along the line.

[0131] 6. Catenary cable anchoring: the terminal end of the new catenary cable is fixed.

[0132] 7. Middle anchor clamping and new catenary cable positioning: install the middle anchor clamp and adjust the position of the catenary cable.

[0133] 8. Elastic suspension installation, electrical connection crimping, suspension inversion, and old line recycling: install the elastic suspension, crimp the electrical connection, adjust the suspension, and recycle the old material.

[0134] 9. Main line suspension preliminary adjustment, inspection and acceptance, side line suspension adjustment, fine adjustment, detection, inspection and acceptance: complete the fine adjustment and acceptance of the main line / side line suspension step by step.

[0135] 10. Power transmission and opening: the system is powered on and put into operation.

[0136] 11. Open observation of the vehicle: monitoring the first train passing state.

[0137] 12. End, return: end of work, personnel and equipment evacuation.

[0138] Need to explain, elastic sling tension, normal elastic sling tension process is tensioned from the center anchor to the anchor on both sides, so as to ensure the uniformity of the elastic coefficient of the catenary, due to the replacement of the load bearing cable, considering the operation of the rail car and the time of laying the line, it is difficult to complete in one construction window point, therefore, in order to quickly complete the recovery of the catenary, the electric sling tensioning equipment is used to speed up the tensioning efficiency of the elastic sling, and each positioning point is tensioned synchronously, which can ensure the rapid recovery of the catenary, and then the speed limit is taken after the replacement of the load bearing cable section is opened, the speed limit is 160km / h after the opening, the elastic sling is tensioned from the center anchor to both sides by using the second window point, and then the suspension is adjusted to restore the elasticity of the catenary, the speed limit is 200km / h after the opening, and the third window point is used to fine tune the parameters of the catenary, the speed limit is 160km / h for the first train after the opening, and the normal speed is recovered subsequently.

[0139] In the second aspect, the application provides a load bearing cable replacement system for a catenary elastic chain suspension of a high-speed railway, which is applied to the method, and the system comprises:

[0140] A first acquisition unit is configured to acquire the axial length and the radial size of the load bearing cable, arrange a mark point at a preset distance based on the axial length, and correspondingly obtain an initial radial size and an initial distance between a first mark point and a second mark point.

[0141] A model unit is configured to train an initial dynamic disturbance compensation model by using historical external dynamic disturbance factors to obtain a target dynamic disturbance compensation model, wherein the historical external dynamic disturbance factors include vibration disturbance, temperature disturbance and wind disturbance swing data.

[0142] A second acquisition unit is configured to acquire the distance between the first mark point and the second mark point of the current load bearing cable, the external dynamic disturbance factor and the radial size, and input the external dynamic disturbance factor into the target dynamic disturbance compensation model to correspondingly obtain a current mark point distance, current dynamic disturbance compensation data and a current radial size.

[0143] A comparison unit is configured to generate a final distance according to the current mark point distance and the current dynamic disturbance compensation data, compare the final distance with the initial distance, and determine a mark point distance difference value.

[0144] A result unit is configured to calculate a difference value according to the mark point distance difference value and the current radial size to obtain a reference factor for replacing the load bearing cable.

[0145] In a third aspect, the present application provides a computer storage medium, having stored thereon a computer program, wherein the computer program, when executed by a processor, enables performance of the steps of the method according to the preceding aspect.

[0146] In a fourth aspect, the present application provides a computer program, wherein the computer program, when executed by a processor, enables performance of the steps of the method according to the preceding aspect.

[0147] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments of the method. Any reference to memory, storage, databases, or other media in the above-described embodiments of the present application can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not limitation, RAM is available in many forms such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.

[0148] The various embodiments in the present disclosure are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments.

[0149] The protection scope of the present disclosure is not limited to the above-mentioned embodiments. Obviously, those skilled in the art can make various modifications and changes to the present disclosure without departing from the scope and spirit of the present disclosure. If these modifications and changes belong to the scope of the claims of the present disclosure and its equivalent technologies, the present disclosure also intends to include these modifications and changes.

Claims

1. A method for replacing a catenary cable of an overhead line system of a high-speed railway, characterized in that The method comprises: acquiring the axial length and the radial size of the bearing cable, arranging mark points at intervals of a preset distance based on the axial length, obtaining the initial radial size and the initial distance between the first mark point and the second mark point; training an initial dynamic interference compensation model by using historical external dynamic interference factors to obtain a target dynamic interference compensation model, wherein the historical external dynamic interference factors include vibration interference, temperature interference and wind disturbance swing data; acquiring the distance between the first mark point and the second mark point, the external dynamic interference factors and the radial size of the current bearing cable, inputting the external dynamic interference factors into the target dynamic interference compensation model to obtain the current mark point distance, the current dynamic interference compensation data and the current radial size; comparing the final distance generated according to the current mark point distance and the current dynamic interference compensation data with the initial distance to determine the mark point distance difference value; calculating the difference value according to the mark point distance difference value and the current radial size to obtain the reference factor for replacing the bearing cable; wherein the step of acquiring the axial length and the radial size of the bearing cable, arranging mark points at intervals of a preset distance based on the axial length, obtaining the initial radial size and the initial distance between the first mark point and the second mark point comprises: acquiring the axial length and the radial size of the bearing cable between two columns to obtain the initial axial length and the initial radial size; arranging mark points at intervals of a preset distance according to the initial axial length to obtain at least the first mark point and the second mark point; obtaining the initial distance according to the first mark point and the second mark point; the step of training an initial dynamic interference compensation model by using historical external dynamic interference factors to obtain a target dynamic interference compensation model comprises: in a test field, simulating vehicle speed and vibration to acquire the shape change of the bearing cable under different speeds and vibrations to obtain vibration interference data; in a test field, simulating temperature change to acquire the shape change of the bearing cable under different temperatures to obtain temperature interference data; in a test field, simulating wind speed and direction to acquire the shape change of the bearing cable under different wind speeds and directions to obtain wind disturbance swing data; combining the vibration interference, temperature interference and wind disturbance swing data and the corresponding shape change of the bearing cable to obtain the historical external dynamic interference factors; constructing an initial dynamic interference compensation model and training the model by using the historical external dynamic interference factors as training data to obtain a target dynamic interference compensation model.

2. The method according to claim 1, characterized in that, the step of acquiring the distance between the first mark point and the second mark point, the external dynamic interference factors and the radial size of the current bearing cable and inputting the external dynamic interference factors into the target dynamic interference compensation model to obtain the current mark point distance, the current dynamic interference compensation data and the current radial size comprises: acquiring the distance between the first mark point and the second mark point and the radial size of the current bearing cable by using a laser scanner to obtain the current mark point distance and the current radial size; Obtain the external dynamic interference factors formed by the data of vibration interference, temperature interference and wind disturbance swing of the current bearing cable location, to obtain the current dynamic interference compensation data.

3. The method according to claim 1, characterized in that, The step of generating the final distance according to the current marker point distance and the current dynamic interference compensation data, and comparing the final distance with the initial distance to determine the marker point distance difference value, comprises: Generating the final distance by difference calculation using the current marker point distance and the current dynamic interference compensation data; Comparing the final distance with the initial distance to determine the marker point distance difference value by difference calculation.

4. The method according to claim 1, characterized in that, The step of calculating the difference value according to the marker point distance difference value and the current radial size to obtain the reference factor of bearing cable replacement, comprises: According to the marker point distance difference value and the current radial size, comparing with the standard information of bearing cable replacement to calculate the difference value and obtain the bearing cable replacement time interval; Taking the bearing cable replacement time interval as the reference factor of bearing cable replacement.

5. The method according to claim 4, characterized in that, The step of comparing the marker point distance difference value and the current radial size with the standard information of bearing cable replacement to calculate the difference value and obtain the bearing cable replacement time interval, comprises: According to the initial state of the bearing cable, the time required to reach the current marker point distance difference value and the current radial size, to obtain a change function; According to the change function and the difference information, predicting the bearing cable replacement time interval.

6. A system for replacing a catenary cable of an overhead line of a high-speed railway, the system comprising: a first cable replacement device according to any one of claims 1 to 5; and a second cable replacement device according to any one of claims 1 to 5. The system applied to the bearing cable replacement method of the high-speed railway catenary elastic chain suspension according to any one of claims 1-5, comprising: A first acquisition unit is configured to acquire the axial length and the radial size of the bearing cable, arrange marker points at intervals of a preset distance based on the axial length, and correspondingly obtain the initial radial size, the initial distance between the first marker point and the second marker point, and the initial distance between the first marker point and the second marker point. A model unit is configured to train an initial dynamic interference compensation model using historical external dynamic interference factors to obtain a target dynamic interference compensation model, wherein the historical external dynamic interference factors include data of vibration interference, temperature interference and wind disturbance swing. A second acquisition unit is configured to acquire the distance between the first marker point and the second marker point of the current bearing cable, the external dynamic interference factors and the radial size, and input the external dynamic interference factors into the target dynamic interference compensation model to correspondingly obtain the current marker point distance, the current dynamic interference compensation data and the current radial size. A comparison unit is configured to generate the final distance according to the current marker point distance and the current dynamic interference compensation data, and compare the final distance with the initial distance to determine the marker point distance difference value. A result unit is configured to calculate the difference value according to the marker point distance difference value and the current radial size to obtain the reference factor of bearing cable replacement. The step of acquiring the axial length and the radial size of the bearing cable, arranging marker points at intervals of a preset distance based on the axial length, and correspondingly obtaining the initial radial size and the initial distance between the first marker point and the second marker point, comprises: Acquiring the axial length and the radial size of the bearing cable between the two columns to obtain the initial axial length and the initial radial size; According to the initial axial length, mark points are arranged at intervals of a preset distance, at least obtaining a first mark point and a second mark point; According to the first mark point and the second mark point, an initial distance is obtained; The step of training the initial dynamic interference compensation model by using the historical external dynamic interference factors to obtain a target dynamic interference compensation model comprises: In the test field, vehicle speed and vibration are simulated, the shape change of the load-bearing cable under different speeds and vibrations is obtained, and vibration interference data is obtained; In the test field, temperature changes are simulated, the shape change of the load-bearing cable under different temperatures is obtained, and temperature interference data is obtained; In the test field, wind speed and direction are simulated, the shape change of the load-bearing cable under different wind speeds and directions is obtained, and wind disturbance swing data is obtained; The vibration interference, temperature interference and wind disturbance swing data, and the corresponding shape change of the load-bearing cable are combined to obtain the historical external dynamic interference factors; An initial dynamic interference compensation model is constructed, and the historical external dynamic interference factors are used as training data to train the initial dynamic interference compensation model to obtain a target dynamic interference compensation model.

7. A computer storage medium having stored thereon a computer program, characterized in that The computer program is executed by the processor to realize the steps of the load-bearing cable replacement method of the overhead contact line elastic catenary suspension of the high-speed railway in any one of claims 1 to 5.

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