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208 results about "Urban rail" patented technology
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Urban rail signal system fault diagnosis method based on knowledge graph and large model
The embodiment of the invention provides an urban rail signal system fault diagnosis method based on a knowledge graph and a large model, and the method comprises the steps: collecting system operation logs, state parameters and fault information in real time, and carrying out the data preprocessing and standardization; based on historical fault data, a fault classification and prediction model is constructed through feature extraction and mode recognition, and automatic fault recognition and risk early warning are achieved; constructing a fault diagnosis knowledge graph, and establishing an association relationship among entities such as equipment, faults, reasons, maintenance schemes and the like; a pre-training large language model and a LoRA technology are adopted for efficient fine tuning, a fault diagnosis reasoning model is trained, and end-to-end generation from fault description to diagnosis and maintenance suggestions is achieved; the knowledge graph and large model output are fused, real-time and historical data are combined, multi-path fault analysis and comprehensive diagnosis are carried out, and a diagnosis report is generated and displayed. The intelligent level, accuracy and efficiency of fault diagnosis can be improved, and technical support is provided for intelligent operation and maintenance management.
Owner:BEIJING MASS TRANSIT RAILWAY OPERATION CORPORATION LIMITED
Urban rail train relay state online monitoring method and system
ActiveCN121500087ASubsonic/sonic/ultrasonic wave measurementCurrent/voltage measurementElectrical malfunctionData set
The invention relates to the technical field of electrical fault positioning, in particular to an urban rail train relay state online monitoring method and system. The specific implementation process comprises the following steps: collecting coil current, contact voltage, load current and environment vibration signals by using an electrical sensor group; when the coil current is subjected to step change, intercepting an electromechanical characteristic data set; arc energy and contact resistance fluctuation characteristics are calculated, correlation analysis is carried out in combination with environment vibration signals, and passive fluctuation and active fluctuation are distinguished; and establishing a multi-factor health degree evaluation model, dynamically adjusting the arc energy and the weight coefficient of the contact resistance according to the magnitude of the load current and the vibration intensity, monitoring the health state of the relay in real time, and predicting the residual life. Through multi-dimensional data synchronous acquisition and vibration decoupling, the interference of mechanical vibration on electrical performance monitoring is effectively eliminated, the problem that a dynamic working condition cannot be reproduced in an off-line test is improved, and the accuracy of relay state evaluation and service life prediction is remarkably improved.
Owner:NANJING SUTIE ECONOMIC & TECH DEV CO LTD
Urban rail train gearbox type incremental fault diagnosis method capable of resisting label noise
The invention discloses an anti-label noise urban rail train gearbox incremental fault diagnosis method, which comprises the following steps of: segmenting and standardizing collected gearbox fault data of an urban rail train bogie according to a preset length to obtain a fault sample; based on the fault sample, constructing a data set which can be used for class incremental learning; constructing a fault diagnosis model, and performing initial training on the fault diagnosis model by using the data set to obtain a fault diagnosis model after initial training; performing incremental training on the fault diagnosis model after the initial training to obtain a trained fault diagnosis model; and performing fault identification on a to-be-detected vibration signal by using the trained fault diagnosis model to obtain a diagnosis result of the gearbox. According to the method, disastrous forgetting and noise interference can be effectively handled, and the accuracy of fault diagnosis of the gearbox of the urban rail train is improved.
Owner:CRRC (CHONGQING) SMART RAIL TRANSIT TECHNOLOGY CO LTD
Intelligent auxiliary decision-making method and system applied to urban rail system emergency command
The invention provides an intelligent auxiliary decision-making method and system applied to urban rail system emergency command, and belongs to the technical field of urban rail transit. Firstly, an urban rail system total factor digital twin covering trains, rails, stations, power supply and emergency resource scenes is constructed; each scene is disassembled into independent twin units, the state and position of a physical entity are synchronized, an abnormal trigger signal is captured by means of a digital twin, an event deconstruction chain is constructed, urban rail emergency resource block chain evidence storage data is called to generate a resource combination scheme, and a trigger rule and execution logic of an intelligent contract are generated based on the resource combination scheme and the event deconstruction chain. According to the method, the intelligent contract is deployed to the urban rail dispatching block chain node, parameters are optimized through digital twinborn simulation, the dispatching instruction is automatically generated and synchronized to the control terminal when the abnormity meets the triggering rule, rapid and accurate emergency response is achieved, and safe operation of the urban rail system is effectively guaranteed.
Owner:SHANGHAI CHARMHOPE INFORMATION TECH CO LTD +1
Network security situation real-time evaluation method and system based on urban rail transit
The invention discloses a network security situation real-time evaluation method and system based on urban rail transit, and the method comprises the steps: collecting original data from a plurality of heterogeneous data sources of an urban rail transit network, carrying out the standardization processing, and generating a standardized security event; constructing a digital twin map; calculating the risk probability of nodes in the graph by using a time-space diagram neural network model, predicting an attack path and evaluating the service influence; a stream processing engine is adopted to consume a standardized security event in real time, and model reasoning, node risk probability updating, attack path prediction and service influence evaluation are performed on a local sub-graph related to the current event in the digital twin graph; and performing real-time parameter fine tuning on the space-time diagram neural network model through an online learning mechanism, and updating the space-time diagram neural network model through an incremental learning mechanism. According to the technical scheme, real-time dynamic prediction and active defense of urban rail network security threats are achieved, and the situation awareness capability and the autonomous protection level of key infrastructures are remarkably improved.
Owner:CASCO SIGNAL LTD
Large-model-driven urban railway newly-opened station flow prediction method
PendingCN122022896ASolve the cold start problemImprove trustCommerceInference methodsLinguistic modelStream data
The invention discloses a large-model-driven urban railway newly-opened station flow prediction method, and relates to the technical field of urban railway traffic operation management. The technical problems of low prediction precision, poor interpretability of a traditional model and insufficient reasoning flexibility in a complex urban scene caused by lack of historical passenger flow data of a newly opened station of an urban rail are solved. The method comprises the following steps: firstly, collecting pre-processed passenger flow related multi-dimensional data, and then constructing a multi-dimensional reference system to retrieve a target station similar reference or extract a macroscopic index reference; judging a scene category through a rule engine, calling a corresponding template, and filling information to generate a structured cue word; inputting the cue word into the large language model, and outputting a content prediction value and a result of a natural language reasoning chain according to the reasoning thinking chain template; and finally, checking the result, and completing optimization of the method based on feedback. The method has a good application prospect in the technical field of urban rail transit operation management.
Owner:SHENZHEN URBAN TRANSPORT PLANNING CENT CO LTD +1
Hot charging process method for wheels and axles of rail transit vehicle
The invention discloses a hot charging process method for a wheel and an axle of a rail transit vehicle, which mainly adopts a hot charging method for cooperatively controlling oven preheating and electromagnetic induction local heating, and utilizes a thermal buffer effect of matrix preheating to slow down the heat dissipation rate of a hub hole and prolong the assembly window period. According to the method, the problem of too fast cooling caused by single local heating is solved while wheel surface oxidation and material deterioration are avoided, the assembly success rate is increased, and comprehensive energy consumption is reduced. And the method is suitable for scenes such as urban rail vehicles, high-speed rails and heavy-load trains with strict requirements on surface quality and assembly precision.
Owner:GUANGDONG CSR RAIL TRAFFIC VEHICLE CO LTD
Urban rail train air conditioner dual-redundancy variable-frequency power supply control method and system
ActiveCN121689486ARailway heating/coolingEmergency power supply arrangementsControl engineeringControl theory
The invention provides an urban rail train air conditioner dual-redundancy variable-frequency power source control method and system, and relates to the technical field of emergency protection circuit devices.The method comprises the steps that multi-compartment cooperative control optimization solution is carried out with train exterior environment time sequence data as dynamic boundary conditions, and K refrigeration distribution time sequence baselines are generated; in the differential refrigeration executing process, time sequence state tracking is carried out, and K in-vehicle environment dynamic parameter streams and K multi-mode power state data are obtained; performing power supply health trend analysis, and outputting K power redundancy margin predicted values; demand deviation identification is carried out, and K refrigeration power dynamic compensation amounts are output; and executing two-dimensional toughness control of the K dual-redundancy variable-frequency power supplies through a distributed consensus negotiation algorithm. The technical problems that in the prior art, urban rail train air conditioner power supply control usually adopts load distribution based on preset rules, dynamic change factors of carriages cannot be responded in real time, and the overall energy efficiency of an air conditioner system is affected are solved.
Owner:NANJING SUTIE ECONOMIC & TECH DEV CO LTD
Cross-professional multi-mode production and maintenance planning and scheduling method for urban rail
The invention discloses an urban rail cross-professional multi-mode production and maintenance plan and scheduling method, which comprises the following steps: a cross-professional production plan dynamic generation step: establishing a unified data interface and a data standard, converging and integrating data in different professional systems, analyzing the production and maintenance requirements of each professional system, and combining the existing plan and real-time construction information to generate a cross-professional production plan; generating a trans-professional preliminary production plan; a cross-professional production scheduling step: based on the preliminary production plan, performing preliminary scheduling on three resources of personnel, time and tools, and generating a globally optimized production plan and resource scheduling scheme based on an improved genetic algorithm; and a multi-mode production plan execution and tracking step: according to the work order type, performing execution management by respectively adopting a precise mode of a curing period and a rough mode of a non-curing period, and establishing a real-time monitoring and dynamic adjustment mechanism. The method is used for solving the problems that professional system data standards are different, sharing is difficult, and cross-professional conjoint analysis and collaborative planning cannot be supported.
Owner:CASCO SIGNAL LTD +1
Urban rail loose paving method mechanized construction device
This invention discloses a mechanized construction device for urban rail transit using the scattered laying method, belonging to the technical field of urban rail transit construction equipment. The device includes a laying vehicle assembly installed on two temporary tracks. A conveying mechanism is installed at the center of the laying vehicle assembly. A lifting mechanism and a laying mechanism are installed on one side of the laying vehicle assembly, with the lifting mechanism positioned above the laying mechanism. This invention, through the design of a pushing and feeding mechanism, allows for the orderly placement of rubber pads on the sleepers while simultaneously adjusting the spacing between multiple sleepers. Both the sleeper adjustment and rubber pad placement processes are automated, requiring no manual operation, thus saving labor costs and significantly improving overall laying efficiency.
Owner:JIANGSU AOXIN SCIENCE&TECHNOLOGY CO LTD
Supervision method, device and equipment for urban rail signal equipment maintenance and medium
The invention discloses a supervision method for urban rail signal equipment maintenance, which comprises the following steps: S1, pre-defining and configuring various model data and conditions required by urban rail signal equipment maintenance process supervision, including defining an urban rail signal equipment main model, a sensing data model and an alarm data model; formulating a supervision rule model of each type of equipment; establishing a mapping relationship with target equipment of the production plan management system; s2, after the overhaul operation is triggered, automatically executing a supervision process, namely receiving overhaul instruction data of the production plan management system in real time, and analyzing and mapping the overhaul instruction data into a to-be-processed task item; sequentially carrying out logic judgment and analysis on task items to be processed based on the supervision rule model; and feeding back a supervision result to the production plan management system. According to the invention, the automatic management and control of the urban rail signal equipment maintenance process is realized, and the supervision efficiency and precision and the controllability of the maintenance operation process are obviously improved.
Owner:CASCO SIGNAL LTD
A method for quantitatively evaluating influence of urban rail transit emergency on passenger flow
The application provides a kind of urban rail burst event influence on passenger flow quantitative evaluation method.The method comprises: based on the multi-source data of urban rail transit, a multi-layer dependent network model of urban rail transit is constructed, a node and edge traffic propagation process is considered to construct an urban rail transit point-edge joint cascading failure model, the parameter calibration of the model is carried out using the historical failure data of urban rail, and a calibrated urban rail transit point-edge joint cascading failure model is obtained;the parameter information of urban rail burst event is input into the calibrated urban rail transit point-edge joint cascading failure model, and the calibrated urban rail transit point-edge joint cascading failure model outputs the influence of the burst event on urban rail transit passengers.The application is based on the physical law and real-time multi-source data of urban rail transit system, designs dynamic cascading failure rules, and accurately simulates the dynamic processes such as passenger flow transfer, station congestion propagation and multi-transportation mode connection obstruction under burst event.
Owner:BEIJING JIAOTONG UNIV +2
A method for saving energy of a city rail comprehensive system based on multi-vehicle cooperative optimization
The application discloses a kind of based on the energy-saving method of urban rail comprehensive system optimization of multi-vehicle cooperation, comprising the following steps: according to basic input data, establish train-line-net-graph comprehensive system coupling model;Establish the time-space-speed three-dimensional state network of train operation;According to train motion characteristics, determine the train control operating mode transfer rule between adjacent time stages in time-space-speed three-dimensional state network;The train state under each time stage of time-space-speed three-dimensional state network is reduced dimension, and effective state space domain is obtained;According to multiple body dynamic programming algorithm, train-line-net-graph comprehensive system coupling model, train control operating mode transfer rule and effective state space domain, output optimal collaborative multi-train three-dimensional trajectory.The application can significantly reduce the iteration number of tidal flow calculation, greatly improve the algorithm efficiency, can simultaneously optimize the running process of all trains in multi-train system, realize system state optimization.
Owner:SOUTHWEST JIAOTONG UNIV
A method, system, device, and computer medium for generating 3D models of urban rail transit.
This application discloses a method, system, device, and computer medium for generating 3D models of urban rail transit, relating to the field of digital twin modeling and 3D visualization technology for urban rail transit. The method involves acquiring diverse and heterogeneous data of urban rail lines, including 2D design drawings and derived data; processing the diverse and heterogeneous data to generate a basic dataset for the urban rail lines; acquiring user-defined configuration data for the urban rail lines; integrating the basic dataset and the user-defined configuration data to obtain a target dataset for the urban rail lines; identifying 3D model elements matching the target dataset for the urban rail lines from a pre-set model library; and rendering the 3D model elements according to the target dataset to generate a 3D model of the urban rail lines. This method ensures that the generated 3D urban rail models meet user needs, provides diversity and flexibility in model construction, improves model scalability, reduces the degree of human intervention, and enhances the efficiency of urban rail modeling.
Owner:HUNAN CRRC TIMES SIGNAL & COMM CO LTD +1
Steel spring outer sleeve with vertical adjustment capability
The utility model discloses a steel spring outer sleeve with vertical adjustment capability. The sleeve comprises a sleeve body, a connecting claw, a protective cover mounting base plate, a first-stage jacking position and a second-stage jacking position, the plurality of connecting claws are uniformly arranged on the peripheral surface of the sleeve body in the circumferential direction and are used for being combined with an external steel spring floating slab; a plurality of first-level jacking positions and a plurality of second-level jacking positions are installed on the inner wall of the sleeve body in the circumferential direction at intervals, the first-level jacking positions and the second-level jacking positions are sequentially and alternately arranged on the inner surface of the sleeve body in the circumferential direction and are different in height, and a protective cover installation base plate is installed on the inner wall, over the first-level jacking positions, of the sleeve body. The adjusting capacity of the steel spring floating slab type ballastless track can be greatly improved, and the steel spring floating slab type ballastless track is suitable for urban rail transit to pass through areas where unfavorable geology and special vibration reduction requirements coincide.
Owner:HANGZHOU YINLONG TANGPULAI TECH CO LTD
A method and system for dynamic distribution of axle control power of a city rail vehicle based on real-time adhesion estimation
This invention discloses a method and system for dynamic distribution of axle control power in urban rail vehicles based on real-time adhesion estimation. The method includes: acquiring real-time operating state data of the vehicle; calculating the dynamic vertical load of each axle during braking by combining the vehicle's longitudinal dynamics model; constructing an extended state observer and using it to estimate the wheel-rail adhesion and wheel-rail contact state parameters of each axle in real time, and calculating the theoretical maximum available adhesion coefficient accordingly; applying an asymmetric rate of change constraint to the theoretical maximum available adhesion coefficient to obtain the safe adhesion limit for constraint; constructing a multi-objective optimization function for braking force distribution, including a braking force tracking error objective and an adhesion utilization rate objective, and weighting the two objectives using adaptive weighting coefficients; and solving the multi-objective optimization function to obtain the optimal braking force for each axle. This invention can significantly improve the adhesion utilization rate and active safety performance of urban rail vehicles under complex road conditions, effectively preventing wheel slippage.
Owner:CHANGSHA UNIVERSITY
Track plate for vibration reduction of urban rail
ActiveCN224227567UImprove connection stabilityNo water accumulationBallastwayTrackwayStructural engineering
Owner:SHANGHAI JUREN RAILWAY EQUIP CO LTD
A method for precise regulation of transport capacity between urban rail transit lines
ActiveCN118982202BData processing applicationsInternal combustion piston enginesTransportation capacityRail transit
A kind of urban rail transit line transport capacity precision regulation and control method, comprising: S100. Obtain urban rail transit line transfer passenger data, according to the transfer passenger data, section passenger flow information is obtained;S200. Obtain car fixed number information, according to the section passenger flow information and car fixed number information, the section congestion degree of urban rail transit line is obtained, according to the section congestion degree, transfer passenger flow density information is obtained;S300. Establish periodic train diagram evaluation mechanism, according to the transfer passenger flow density information, optimize rail transit line train diagram;S400. Real-time update the transfer passenger flow density information, the train diagram iterative optimization is carried out, set the iteration number or other iteration termination condition, obtain the final rail transit line train diagram.The method disclosed in the application considers the distribution of transport capacity in transfer station with different transfer passenger flow density, can save passenger travel time, improve passenger satisfaction, and reasonably allocate transport capacity.
Owner:CHINA RAILWAY SIYUAN SURVEY & DESIGN GRP CO LTD
Casting process of high-precision urban rail line rubber shock absorber casting
The invention relates to the technical field of metal casting, in particular to a casting process of a high-precision urban rail line rubber shock absorber casting, which comprises the following steps of: designing and manufacturing a mold according to the target size of the casting and the mold shrinkage rate of 0.58%; the sand shooting pressure is controlled to be 2.2-2.4 MPa, the extrusion pressure is 12-14 MPa, the mold closing thrust is 1600 MPa, and the weight ratio of the sand mold to the molten iron is controlled to be 1.5: 1; the pouring temperature of the molten iron is controlled to be 1390-1420 DEG C, and the carbon equivalent of the molten iron in the furnace is controlled to be 4.5%; the water content of the molding sand is controlled to be 3.3-3.5%, and the compaction rate is 34-38%; according to the invention, the problem of rubber leakage in the rubber vulcanization process caused by out-of-tolerance of the size of the casting is fundamentally solved, the related complaint proportion is reduced from 2% to 0%, the production cost is effectively reduced, and the product quality is ensured.
Owner:CHANGZHOU BUSUZHE MASCH MFG CO LTD
A bending and forming device for aluminum alloy parts of urban rail vehicles
ActiveCN224272831UFully contactedavoid collisionMetal-working feeding devicesVehicle componentsElectric machineryStructural engineering
This utility model relates to the field of urban rail vehicle component processing technology, and discloses a bending and forming device for aluminum alloy parts of urban rail vehicles. The device includes a frame, a material support platform fixedly mounted on the upper end of the frame, a downward hydraulic rod fixedly mounted on the upper end of the frame, and a downward pressure plate fixedly connected to the lower end of the hydraulic rod. A rotating bending hydraulic rod is mounted on the lower end of the frame, and a bending plate is rotatably connected to the upper end of the hydraulic rod. A switching mechanism is provided inside the downward pressure plate, which changes the concave shape of the material by switching the shape of the contact point with the material. This bending and forming device for aluminum alloy parts of urban rail vehicles, by setting a switching mechanism inside the downward pressure plate and using a switching motor to drive the central shaft to rotate, can easily switch the contact between the arc-shaped contact rod and the right-angle contact rod with the material, thereby changing the concave shape of the material. Compared with traditional devices, this eliminates the need to replace the entire contact component or even the mold.
Owner:SHANXI LICHUAN TECHNOLOGY CO LTD
Train-ground cooperative control method for regenerative braking energy of urban rail train
PendingCN121689344AData processing applicationsBatteries circuit arrangementsControl theoryEnergy conservation
The invention discloses a train-ground good control method and system for regenerative braking of an urban rail train. A hybrid energy storage framework comprising an energy type ground energy storage system and an energy type railway energy storage system is evaluated. In the planning stage, a multi-objective optimization algorithm is adopted for coordinating and searching for capacity configuration of an optimal vehicle-ground standby system, initial investment is balanced, and energy conservation and high efficiency are achieved. And real-time and good charging time table control: during operation, setting and accessing mutually independent voltage threshold groups with strategic differences for the vehicle-ground energy storage system, and constructing a priority scheduling priority. And online self-adaptive threshold correction: according to the actual energy variation of the energy storage system monitored and counted in real time, dynamically parameters the threshold reference value so as to adapt to the working condition change. Through vehicle-ground coordination, the emergency of a single power grid scheme is overcome, the comprehensive benefit of regenerated energy can be obviously improved, the obtained power grid voltage stability is optimized, and the power grid voltage stability is enhanced.
Owner:HENAN MECHANICAL & ELECTRICAL VOCATIONAL COLLEGE
A Method and System for Constructing Constrained Feasible Path Sets Based on Urban Rail Network Model
This invention discloses a method and system for constructing a constrained feasible path set based on an urban rail transit network model. The method includes the following steps: loading basic information on urban rail transit system stations and lines; analyzing the spatial logical relationships between the network, stations, and lines based on the characteristics of the urban rail transit network to construct a spatial topology model of the urban rail transit system network; and using a constrained breadth-first search algorithm to search for a set of feasible paths between OD pairs that satisfy the maximum number of transfers constraint, and selecting the shortest path between OD pairs. This invention can search for a set of feasible paths between OD pairs in an urban rail transit network, providing a basis for building a rail transit network simulation platform and analyzing passenger flow characteristics.
Owner:SOUTHEAST UNIV
Machine learning-based urban rail train energy consumption dynamic optimization method and system
This invention discloses a machine learning-based method and system for dynamic energy consumption optimization of urban rail transit trains, relating to the field of data processing technology. The method includes: interactively acquiring train operation status data and station passenger flow data, analyzing passenger flow disturbance trends, and generating dynamic load evolution characteristics. It also involves collecting track environment data such as gradient curvature before and after stations and environmental disturbance data, combining this with load characteristics to conduct resistance correlation analysis, and obtaining dynamic resistance evolution characteristics. Furthermore, it involves constructing a dynamic energy consumption constraint field based on operational tasks, conducting dual-path optimization for pre-station kinetic energy recovery and post-station traction start control, and realizing dynamic optimization management of urban rail transit train energy consumption based on the optimization results. This invention solves the technical problem of existing urban rail transit train energy consumption optimization methods using static parameter settings and independent control processes, which cannot couple the dynamic changes of passenger flow load and track environment. It achieves the technical effect of improving energy consumption control accuracy and energy recovery utilization rate, reducing energy consumption while meeting operational requirements.
Owner:NANJING SUTIE ECONOMIC & TECH DEV CO LTD
Urban rail transit industry-oriented vertical domain large model construction method, equipment and medium
The invention discloses an urban rail transit industry-oriented vertical domain large model construction method, equipment and a medium, and relates to the technical field of data processing. The method comprises the steps of obtaining an industry general identification large model through pre-training, performing secondary fine tuning training on the basis of the industry general identification large model to obtain a vertical domain large model, and realizing establishment of a local urban rail operation business process and a term system of the vertical domain large model and deep understanding of industry general knowledge. And therefore, the vertical domain large model can more accurately analyze the user intention and generate the disposal suggestions conforming to the urban rail business specifications. The vertical-domain large model is integrated into the vertical scene intelligent agents suitable for different subdivided professional scenes, and the to-be-processed tasks are executed by adopting a triage mechanism, so that the vertical-domain large model executes complex tasks, the vertical scene intelligent agents execute high-frequency professional tasks, the excessive dependence of the vertical-domain large model is reduced, and the processing efficiency is improved. Cooperative processing of a to-be-executed task by the vertical scene intelligent agent and the vertical domain large model is realized.
Owner:QINGDAO ZHIYUN RAIL TECHNOLOGY CO LTD
Urban rail transit vehicle system risk point grading method and system
This invention provides a method and system for risk point classification in urban rail transit vehicle systems, belonging to the field of urban rail transit operation and maintenance technology. It analyzes and obtains the component composition and connection relationships within the urban rail vehicle system; determines the structural importance index, functional importance index, and critical index based on accident data for each component; uses the K-Means++ algorithm based on a genetic algorithm to determine the number of classifications and clustering results; applies the Gini importance quantification of random forests to quantify the weights of the three types of indicators, calculating the correspondence between the clustering results and the classification levels; and uses set theory as a guide to form the classification results of urban rail vehicle risk point sets. This invention, from the perspective of networked operation and comprehensively considering multiple factors, achieves more accurate risk point classification in urban rail vehicle systems, which has significant theoretical and practical implications for improving rail transit operation safety risk management and ensuring safe and efficient operation.
Owner:BEIJING JIAOTONG UNIV
Man-machine collaborative assembly method and system for crossbeam of urban rail vehicle bogie
The present application provides a kind of urban rail vehicle bogie crossbeam is formed man-machine collaborative assembly method and system, belongs to bogie crossbeam assembly technical field, comprising: single pipe assembly system, crossbeam assembly automatic assembly system, welding robot and control system;The single pipe assembly system receives the motor hanger and carries out laser scanning to the assembly surface of motor hanger, obtains point cloud data, transmits point cloud data to control system;The control system obtains motor hanger scanning model based on point cloud data, carries out virtual assembly according to assembly size with the model of the crossbeam steel pipe to be assembled in motor hanger scanning model, based on assembly result, the area, depth and range that motor hanger needs to be ground are output, and the motor hanger after grinding is used to complete single pipe assembly with crossbeam steel pipe, and single pipe assembly structure is obtained;Welding robot is positioned after the automatic centering of two single pipe assembly structures and carries out automatic positioning welding to the connecting part of steel pipe and longitudinal beam, and obtains complete crossbeam.
Owner:CRRC QINGDAO SIFANG CO LTD
Pocket outdoor grounding switch and control mechanism
PendingCN121964425AEffortless switch operationReduce the temperatureContact driving mechanismsSwitch power arrangementsTorque motorElectric control
The invention discloses a pocket-size outdoor switch and control mechanism with a grounding function. The outdoor switch and control mechanism with the grounding function comprises a switch body with a grounding function, a transmission part and an electric control box. The invention discloses an outdoor grounding switch and a control mechanism. A switch body is composed of a machine base part, a conductive part and a grounding part. The base part is composed of a base, a main shaft, a middle swing rod and a grounding part. A transmission component is in butt joint with a self-made energy-saving mechanical ball distance-limiting safety coupler at an upper port of a control box below through a coupler and a transmission rod, namely a double-end cross-shaped spline telescopic universal joint, wherein the constant-angular-velocity bevel gear pair is arranged at the output shaft end of a main shaft of a switch body and has a 90-degree intersection angle; and the self-made energy-saving mechanical ball distance-limiting safety coupler is arranged at the upper port of the control box below. The electric control box outputs torque of 12.Nm through a direct current torque motor, speed reduction is carried out through a 1: 4 bevel gear, and a main shaft in the electric control box is used for controlling the outdoor disconnecting switch which is 3 m high above to be switched off / switched on at the speed of 4 revolutions per minute and the torque of 48 N.m. All parts reach the interchange standard, and the switch is produced nationwide, is low in energy consumption, is environment-friendly, and can meet the urgent demands of metros, light rails, rails, intercities and the like in urban rails in China at present for high and medium voltage energy-saving outdoor isolation switches.
Owner:金晓亮 +1
A method and system for protecting the safe operation of a virtual consist train
ActiveCN120270302BAchieve high-precision forecastingHigh precisionRailway traffic control systemsReal-time dataSafe operation
The application discloses a kind of virtual marshalling train's tracking operation safety protection method and system, it is related to urban rail transit management technical field.The application includes: obtaining the historical data feature set of leading train and the actual acceleration of leading train in the historical operation process of virtual marshalling train.The historical data feature set is input into acceleration prediction model, and the predicted acceleration of leading train is obtained.The error of the predicted acceleration of leading train and the actual acceleration of leading train is minimized as the goal, and the acceleration prediction model is trained, and the trained acceleration prediction model is obtained.Real-time data feature set is input into the trained acceleration prediction model, and the predicted acceleration and predicted speed of leading train at next time step are obtained, and then the safety protection distance between following train and leading train at next time step is obtained.The application can significantly improve the accuracy of safety protection distance, and guarantee the safe and efficient operation of virtual marshalling train.
Owner:LANZHOU JIAOTONG UNIV
Bogie for urban rail vehicle
The invention discloses a bogie for an urban rail vehicle, which is used for connecting a rail and a bogie body of an urban rail carriage, and comprises two connecting shafts symmetrically arranged on the bogie body; the rolling bearings are arranged in the middles of the connecting shafts and used for adapting to speed change of the ends of the connecting shafts; the driving part is arranged on the bogie body and used for driving the connecting shafts on the two sides of the rolling bearing to rotate; the balance sensor is arranged on the bogie body and used for detecting the balance state of the bogie body and detecting that the bogie body passes through a track curve; the brake mechanism is used for braking the connecting shafts on the two sides of the rolling bearing respectively; and the power recovery part is used for recovering variable-speed kinetic energy of the connecting shafts on the two sides of the rolling bearing and controlling the connecting shafts to decelerate. When the bogie turns, the speed of the wheels is adjusted in a self-adaptive mode, the attaching degree of the wheels and the track is improved, abrasion of the wheels and the track is avoided, the service life of the wheels and the track is prolonged, and potential safety hazards are reduced.
Owner:SHENZHEN CNR RAILWAY VEHICLE CO LTD
Urban rail train group autonomous decision-making method
PendingCN122009288AInternal combustion piston enginesAutomatic systemsDecision makerControl engineering
The invention provides an autonomous decision-making method for an urban rail train group, and belongs to the field of urban rail transit train operation control and intelligent scheduling. According to the method, the running interval self-adaptive adjustment and collaborative optimization of multiple trains under the dynamic passenger flow condition are realized by constructing a distributed collaborative framework based on train-train communication, establishing a dynamic passenger flow prediction model and designing an autonomous decision maker based on Sarsa reinforcement learning; therefore, the passenger service quality is improved and the operation cost is reduced on the premise of ensuring the operation safety.
Owner:SOUTHWEST JIAOTONG UNIV