31 results about "Metro system" patented technology

The invention discloses a subway transport capacity matching and passenger flow collaborative management and control method based on multi-agent reinforcement learning, and relates to the technical field of urban rail transit operation management. The method comprises the following components: S1, a subway system digital twin model construction step, S2, a multi-agent reinforcement learning training environment construction step, S3, an extreme scene simulation and agent training step, S4, a virtual-real data interaction and model iteration step and S5, an actual system deployment and decision execution step. According to the method, a high-fidelity digital twin model of a subway system is constructed, extreme scenes including passenger flow retention caused by rainstorm and instantaneous large passenger flow of a large competition field are simulated in the model, and a multi-stage sampling method based on scene clustering is combined to perform training for ten millions of times; and the decision-making capability and the cooperation efficiency of the multiple agents in the face of complex and extreme conditions are obviously improved.

The invention discloses a multi-scene distributed optical fiber acoustic sensing vibration data fusion early warning platform, and relates to the technical field of scene vibration early warning. A vibration analysis and sorting module analyzes collected vibration signals by using a multi-source data fusion algorithm, identifies and classifies the characteristics of vibration sources, automatically performs priority sorting on the vibration sources, and performs early warning on the vibration sources; an area with potential threats is selected for secondary analysis and real-time monitoring; and the strategy generation and early warning module automatically predicts the risk level of each region of the subway according to the vibration source identification and analysis result, and formulates a coping strategy based on the priority and the risk level. According to the early warning platform, through multi-sensor data fusion and an intelligent priority ranking mechanism, the precision and timeliness of vibration monitoring are remarkably improved, and real-time dynamic early warning and intelligent resource management are realized, so that efficient and safe operation of a subway system is ensured.

The invention relates to the technical field of battery management, and discloses a lithium battery intelligent management and temperature adaptive adjustment method and system in a severe environment. The method comprises the following steps: synchronously acquiring multi-dimensional environment data to establish a monitoring database aiming at a severe environment of a subway UPS (Uninterrupted Power Supply) system; calculating an environmental adaptability threat index by adopting a Kalman filtering algorithm; generating differentiated charging and discharging management parameters in combination with the threat index and the UPS switching demand; inverting the actual working temperature of the battery through the internal resistance change; when the temperature affects the power supply capacity, the carbon fiber heating film self-heating system is started, and the optimal working state of the battery is maintained by adopting a PID algorithm. According to the application, a threat evaluation system and a differentiated charging and discharging management strategy based on multi-environmental factor fusion are established, and through internal resistance inversion temperature detection and PID self-heating control, the power supply reliability and the battery service life of the UPS system in severe environments such as a subway river-crossing tunnel and the like are remarkably improved.

The invention relates to a subway BOM ticket business processing method and system based on artificial intelligence, and solves the problems that the verification accuracy is reduced, the processing efficiency is low and the overall adaptability is insufficient due to the fact that an existing subway BOM system excessively depends on a single electronic data dimension and a fixed process. The method comprises the following steps of: extracting and verifying visual and electronic characteristics by acquiring ticket card images and electronic data and adaptively switching acquisition modes; and when the verification is passed, performing secondary verification by using the multi-modal knowledge graph and combining space-time anomaly enhancement to associate the preferential rule. And when the verification fails or the features do not reach the standard, analyzing the emotion of the user, diagnosing an abnormal root cause, and dynamically optimizing system parameters to generate guidance by taking the abnormal root cause as a target. And finally, intelligent ticket business routing is carried out based on reinforcement learning or an adaptive scheme is executed according to risk assessment, so that whole-process intelligent processing is realized. The method has the advantages that dynamic adaptation of metro ticket business processing is achieved, and efficiency and recognition precision are improved.

The invention discloses a subway carriage fire hazard temperature prediction method comprising the following steps: carrying out fire hazard working condition simulation on a subway carriage to obtain fire hazard experiment data, and preprocessing the fire hazard experiment data to obtain a preprocessed data set; constructing an initial temperature prediction model based on the multi-layer feed-forward network and a genetic algorithm; training the initial temperature prediction model based on the preprocessed data set to obtain a temperature prediction model; and carrying out compartment top temperature prediction on the subway compartment through the temperature prediction model. According to the method, a temperature database is constructed based on a subway carriage fire numerical model, and proper hyper-parameter values are determined. A GA-BPNN algorithm model composed of an input layer, a hidden layer and an output layer is adopted to predict ceiling temperature distribution of subway train carriage fire, and operation management of a tunnel subway system is expected to be further improved.

The invention relates to a subway AFC system pressure test method and system based on protocol-level virtual signal injection, and the method comprises the steps: presetting a plurality of passenger flow modes according to different conditions in an actual application scene; configuration of dynamic parameters and load intensity is carried out on each passenger flow model, and a virtual passenger behavior sequence conforming to a statistical law is generated in real time based on the dynamic parameters; analyzing the virtual passenger behavior sequence into discrete events with time sequence labels, and mapping each event into a protocol instruction conforming to an AFC system communication specification by using a multi-protocol template library; generating a high-concurrency signal based on the protocol instruction, injecting the signal into a real AFC central server, and dynamically adjusting the test load intensity and the passenger flow mode to carry out a pressure test; multi-dimensional data in the pressure testing process are collected, performance analysis is conducted, and the system is used for achieving the method. Compared with the prior art, the fault positioning capability, the testing efficiency and the testing precision are improved, and the testing cost is greatly reduced.

This invention provides an active bias magnetization cancellation method and system based on grid-side reverse DC injection. Based on metro operating data, a bias magnetization feedforward prediction model is used to predict the DC bias magnetization trend caused by stray currents. Based on the DC current value and the DC bias magnetization trend, a hybrid feedback controller integrating sliding mode control and proportional-integral-derivative (PID) algorithm is used to generate a compensation current signal. Based on the compensation current signal, a silicon carbide-based bidirectional DC-DC converter installed at the transformer neutral point is controlled to output a reverse DC injection current with controlled amplitude and polarity. This current is used to generate a magnetomotive force in the transformer opposite to the DC bias magnetization trend, thus actively canceling the transformer's DC bias magnetization. This shifts the focus of the control from the traditional metro side to the grid side, eliminating the need to modify the metro system. Active bias magnetization cancellation can be achieved simply by connecting a silicon carbide-based bidirectional DC-DC converter on the grid side, reducing modification costs and complexity, and contributing to the safe and stable operation of the power system.

This application discloses a method, apparatus, and electronic device for determining a renovation scheme for leaky cable lines in subway systems, relating to the field of communication technology. The method includes: constructing a structured dataset based on basic data of the subway system and characteristic data of leaky cable lines within the system; determining the type of leaky cable line based on the structured dataset; if the leaky cable line type is an existing, usable type, using a first preset scheme as the renovation scheme; and if the leaky cable line type is a type requiring new construction, using a second preset scheme as the renovation scheme. This application solves the technical problems of high cost, long construction period, and high risk in existing subway leaky cable line renovation schemes.

The application provides a metro DC traction power supply system catenary fault ranging method and device, comprising: obtaining fault recording data generated when the double-sided protection device acts, wherein the fault recording data comprises feeder voltage and feeder current; based on the feeder current at any point in time, the feeder current at the next time is obtained through a prediction algorithm, in response to the prediction result meeting the preset condition and the feeder having voltage, the fault starting point of the double-sided protection device is determined; data processing is performed on the two fault starting points to obtain ranging data points; the feeder voltage and the feeder current of the ranging data points are subjected to fault ranging through a fault ranging algorithm to determine the fault point position of the catenary. The metro DC traction power supply system catenary fault ranging method and device provided by the application can realize fault ranging by analyzing the recording file, and improve the reliability and performance of the metro system.

This application discloses a subway BAS system based on wireless communication technology, including: a station-level network and a field-level network; the station-level network includes: an automation control module; a station local area network of an integrated monitoring system, which is connected to the automation control module via a main cable or an Ethernet cable; the field-level network includes multiple electromechanical devices and multiple ground-level I / O module boxes; each electromechanical device and each ground-level I / O module box is respectively connected to a monitoring-end wireless communication module; the electromechanical devices and each ground-level I / O module box are respectively signal-connected to the automation control module through their corresponding monitoring-end wireless communication modules. Therefore, this disclosure is beneficial for improving communication capabilities, overcoming the transmission distance limitations of hard-wired connections; reducing cable laying and equipment wiring work, saving construction materials and labor costs, greatly reducing project investment; and providing good scalability.

The utility model discloses a subway single crossover shield tunneling machine propelling device which comprises a hydraulic cylinder body, a base is fixed to the bottom of a cylinder body of the hydraulic cylinder body, a circulating pump is fixed to the base, a cooling pipe is wound on the outer side of the cylinder body of the hydraulic cylinder body, and the two ends of the cooling pipe are connected with a liquid inlet pipe and a liquid return pipe in a sealed mode respectively. The liquid inlet pipe is connected with the liquid inlet end of the circulating pump in a sealed mode, the liquid return pipe is connected with the liquid outlet end of the circulating pump in a sealed mode, a support is further fixed to the cylinder body of the hydraulic cylinder body, and a plurality of cooling fans are fixedly embedded into the support. According to the propelling device of the subway single crossover shield tunneling machine, the hydraulic cylinder body can be continuously and efficiently cooled, high-temperature operation of the hydraulic cylinder body is avoided, the good working performance of the hydraulic cylinder body is kept, the service life of the hydraulic cylinder body is prolonged, and therefore the working efficiency of the shield tunneling machine is improved, and the maintenance cost is reduced.

The application discloses a rail train and a bogie mounting structure. The bogie mounting structure comprises a bogie bearing structure, an end structure and a bogie. The bogie bearing structure comprises a bogie side beam, an end side floor, a pillow side floor, a pillow inner floor and a long floor. The end structure comprises a pillow beam, a traction beam and a transition plate. The pillow beam and the traction beam are partially embedded in the interior of the bogie bearing structure. The bogie comprises rubber wheels, steel wheels, guide wheels, a rotary support structure and a framework. The rubber wheels are located outside the steel wheels. The framework is fixed below the end structure through the rotary support structure. A side beam notch is arranged below the bogie side beam and located at the front and back positions of the pillow beam. The side beam notch is distributed at the corresponding position of the rubber wheels to provide a movement space for the rubber wheels. The application solves the problems of small radius and large slope climbing of a large-capacity rubber wheel subway system and the strength problem of the vehicle body itself.

The present application relates to the technical field of subway station wind pavilion mouth water blocking, and particularly refers to a subway station wind pavilion mouth sealing water blocking equipment. A subway station wind pavilion mouth sealing water blocking device is arranged at the wind pavilion mouth, characterized in that one side of the wind pavilion mouth is provided with a sealing door plate stacking area for storing sealing door plates, and the subway station wind pavilion mouth sealing water blocking device comprises a guide rail system and a carrying system. The present application has the advantages of efficient and rapid response, high-strength waterproof performance, optimized structure for saving space, long-term stability and safety, easy operation and maintenance, and provides a new solution for flood control and waterlogging prevention of subway stations, effectively improves the safety and emergency response capability of the subway system, and has important practical value and social significance.

This invention provides a random key heuristic method for solving the vulnerability envelope problem of subway networks. The method includes: constructing a two-layer model of the subway network vulnerability envelope problem; calculating the fitness value of individuals using the two-layer model; assigning continuous real-valued keys ([0, 1]) to each line interval using random key encoding; generating initial key values ​​for each line interval using the betweenness centrality of the line intervals as weights; constructing an initialized population using the initial key values ​​of each line interval; performing neighborhood search optimization on the initialized population to obtain an elite population set; and performing biased crossover and mutation processing on the non-elite population from the previous generation of the elite population set to obtain an output result including the subway network vulnerability envelope curve and combinations of key vulnerable line intervals. This invention can improve the proactive prevention and control capabilities and overall resilience of subway systems, thereby providing direct and quantifiable decision-making basis for planning and construction, emergency response, and resource allocation.

The invention relates to the technical field of edge computing, and discloses a metro power distribution system fault pre-judgment and full-period operation and maintenance method, which effectively eliminates the physical system difference between an alternating current power grid and a direct current metro system by constructing a physical impedance feature alignment mechanism, solves the technical problem of cross-domain fault feature migration distortion, and improves the fault pre-judgment and full-period operation and maintenance efficiency. A physical perception type generative network with an embedded circuit constitutive equation and a thermodynamic cumulative effect is utilized, the defect that an artificial intelligence model is prone to generating physical common sense violation pseudo data under the small sample condition is overcome, the physical credibility of an expansion sample set is remarkably improved, and further, the physical reliability of the expansion sample set is improved. Based on an entropy increase self-acceleration stochastic dynamics model and a train kinematic energy theorem, accurate prediction of a fault nonlinear evolution trajectory and real-time calculation of a dynamic safety envelope are realized, and an active defense strategy can be accurately triggered before system failure. Therefore, the full-period operation and maintenance safety and the emergency response efficiency of the subway power distribution system are greatly improved.

The utility model relates to the technical field of earthen archaeological site protection above subways, in particular to a vibration isolation layer structure of an earthen archaeological site. The utility model provides a vibration isolation layer structure of an earthen archaeological site, which is arranged between the earthen archaeological site and a structural middle plate of a subway system, and the structural middle plate is arranged above a tunnel of the subway system. The vibration isolation layer structure of the earthen archaeological site comprises a steel pipe curtain, a bearing structure and a plurality of vibration reduction supports. The vibration reduction support comprises a top plate, a bottom plate and an elastic assembly. Two ends of the elastic component are respectively connected with the top plate and the bottom plate; the upper end of the steel pipe curtain is connected with the earthen site, and the lower end of the steel pipe curtain is connected with the top plate through a bearing structure. The steel pipe curtain and the bearing structure are arranged to support the earthen ruins, the vibration energy generated when a train passes through is absorbed in cooperation with the vibration reduction supports, the earthen ruins located on the station hall layer can be protected and are not affected by the vibration energy generated when the train passes through, and important significance is achieved for earthen ruins protection.

The invention belongs to the technical field of rail traffic control, and provides a subway AI industrial control system in order to solve the technical problems of insufficient interfaces, high AI reasoning delay and multi-module stacking in the prior art, which comprises a main control module, an FPGA (Field Programmable Gate Array) component, a serial port and isolation protection module, a storage module, a display output module, a power management module and a network module, through system structure design and hardware interface optimization, multi-path display output, multi-channel data communication and abundant peripheral extension functions are realized, and the safety and operation and maintenance efficiency of a subway system are improved.

The application discloses a kind of subway network key site identification method and system considering bus substitution, based on subway and bus station and line data in research range, respectively construct subway weighted network and bus weighted network with travel time as weight, select the bus station in the walking range of subway station by space connection method, construct initial bus alternative network, combined with walking time, passenger walking perception coefficient and acceptable travel time threshold, finally weighted bus alternative network is obtained by optimization;Calculate the betweenness centrality, closeness centrality and weighted degree centrality of each subway station, establish a comprehensive importance calculation model, and identify the key stations in the subway network based on the comprehensive importance. The application is used for accurately capturing the importance of subway station in network structure and the trade-off relationship of bus alternative service availability, which can provide decision support for subway system emergency plan and connection bus line network planning.

This application relates to the field of battery management technology and discloses a method and system for intelligent management and temperature adaptive regulation of lithium batteries in harsh environments. The method includes: simultaneously collecting multi-dimensional environmental data to establish a monitoring database for the harsh environment of a subway UPS system; calculating an environmental adaptability threat index using a Kalman filter algorithm; generating differentiated charge and discharge management parameters by combining the threat index and UPS switching requirements; inverting the actual battery operating temperature through internal resistance changes; and activating a carbon fiber heating film self-heating system when temperature affects power supply capacity, using a PID algorithm to maintain the battery in its optimal operating state. This application establishes a threat assessment system based on the fusion of multiple environmental factors and a differentiated charge and discharge management strategy, and significantly improves the power supply reliability and battery life of the UPS system in harsh environments such as subway tunnels crossing rivers through internal resistance temperature detection and PID self-heating control.

The utility model provides a positioning early warning system of a metro vehicle, and belongs to the technical field of vehicle positioning. The positioning and early warning system for the metro vehicle comprises a first vehicle detection module, a first early warning module, a distance measurement module, a first switch module, a main control module and a communication module, the power supply end of the first vehicle detection module is connected with a power supply. The output end of the first vehicle detection module is connected with the master control module. A first end of the first switch module is connected with a power supply, a second end of the first switch module is connected with power supply ends of the first early warning module and the distance measuring module, a control end of the first switch module is connected with the master control module, and an output end of the distance measuring module is connected with the master control module; the output end of the distance measuring module is connected with the input end of the first early warning module, and the first early warning module is used for sending out a first positioning early warning signal; the master control module is in communication connection with a terminal through the communication module. According to the invention, high-standard requirements of a subway system on safety and efficiency can be met.

The invention relates to the technical field of rail transit, and provides a resource scheduling method and device for a subway system, equipment and a medium. The method comprises the steps of obtaining first multi-modal data corresponding to a subway system, and performing data fusion based on the first multi-modal data to generate an associated database; determining the device priority of each device in the subway system according to the association database; constructing a three-dimensional resource scheduling model corresponding to the subway system based on the space dimension, the time dimension and the cost dimension; performing collaborative optimization on the three-dimensional resource scheduling model based on the device priority of each device to obtain an optimized three-dimensional resource scheduling model; and generating a resource scheduling scheme according to the optimized three-dimensional resource scheduling model, and performing resource scheduling on the subway system according to the resource scheduling scheme. Based on the scheme of the invention, the resource scheduling accuracy of the subway system can be improved.

The utility model relates to the technical field of protection of earthen ruins above subways, in particular to a joist structure of an earthen ruins. The joist structure of the earthen ruins is transversely arranged between a steel pipe curtain and a vibration reduction support and used for supporting the steel pipe curtain, the steel pipe curtain is located below the earthen ruins and used for supporting the earthen ruins, the vibration reduction support is arranged on a structural middle plate of the subway system, and the structural middle plate is located above a tunnel of the subway system. The joist structure of the earthen archaeological site comprises 700mm * 700mm square steel tubes and a steel bar frame. The steel bar frame is a frame formed by binding a plurality of steel bars, the interior of the square steel pipe is hollow, the steel bar frame is fixedly arranged in the square steel pipe, and the square steel pipe is filled with concrete; the upper side and the lower side of the square steel pipe are welded to the steel pipe curtain and the damping support correspondingly. The steel bar frame is arranged in the square steel tube and filled with concrete, so that high strength is formed; vibration energy generated when the train passes through is absorbed in cooperation with the vibration reduction supports, and the earthen ruins located on the station hall layer are protected and are not affected by vibration generated when the train passes through.

1.The name of the design product: smart customer service center (Hui character type). 2.The use of the design product: the product is a new type of smart center (device) of the subway AFC system, which is placed in the station hall. Passengers can operate through a large touch screen in Chinese and English, and can pay for tickets by cash or scanning codes. They can also query related information, including line stations, surrounding businesses of stations, fare tables, operating hours, etc. They can also perform voice-related operations and interact with station staff through voice remote communication. 3.The design points of the design product: the combination of shape and pattern. 4.The picture or photo that best indicates the design points: perspective view.

The present application belongs to the technical field of complex network propagation control, and specifically relates to a metro train popular disease propagation control optimization method based on an agent model and probability search. The present application comprises the following steps: identifying trains and reconstructing a continuous-time car co-contact network based on smart card data and operation timetables, establishing an event-driven SEIR propagation simulation model and taking early system infection load SIL as a propagation control effect evaluation index; generating a candidate train control set and corresponding effect label data under the constraint of train control quantity k, and constructing an agent prediction model which is insensitive to train set sequence; initializing a train selection probability distribution, and performing sampling, screening and probability updating in an iterative search mode to generate a propagation control optimization scheme. The present application can obtain a better train propagation control scheme with a limited simulation budget under the condition of high propagation simulation cost and a large number of candidate combinations, thereby improving the popular disease propagation control efficiency of the metro system under the budget constraint.

The utility model relates to the technical field of earthen archaeological site protection above subways, in particular to a steel pipe curtain structure of an earthen archaeological site. The steel pipe curtain structure of the earthen archaeological site is arranged below the earthen archaeological site and used for supporting the earthen archaeological site, the steel pipe curtain structure of the earthen archaeological site is arranged on a structural middle plate of a subway system through a vibration reduction support, and the structural middle plate is located above a tunnel of the subway system; the steel pipe curtain structure of the earthen archaeological site comprises a surrounding plate and a plurality of square steel pipes of 500 mm * 500 mm. The coaming surrounds the lower end of the earthen archaeological site; all the square steel pipes are sequentially and transversely arranged and connected through lock catch assemblies to form a steel pipe curtain, and the steel pipe curtain is transversely arranged below the earthen ruins. The lower edge of the coaming is welded with the steel pipe curtain. The steel pipe curtain composed of a plurality of square steel pipes is arranged to support the earthen ruins, the vibration energy generated when a train passes through is absorbed in cooperation with the vibration reduction supports, the earthen ruins located on the station hall layer can be protected and are not affected by vibration generated when the train passes through, and the steel pipe curtain has important significance on earthen ruins protection.

The invention discloses a real-time communication and arrival information pushing device for mobile equipment in a subway carriage, and relates to the technical field of rail transit communication and information pushing. The device comprises a core control unit, a multi-mode communication module group, a vehicle-mounted data interaction module, a power supply management module, a fault diagnosis module and a shell structure, wherein the core control unit is used as a center for coordinating all the modules to work. The vehicle-mounted data interaction module adopts the design of main and standby double interfaces and underground section strengthened calibration, takes subway TCMS system data as the main part and takes GPS / Beidou positioning and RFID calibration as the auxiliary part, and obtains train real-time position data with the precision smaller than or equal to 3 meters; the multi-mode communication module group adopts a dual-mode architecture with Bluetooth BLE 5.3 as a main part and Wi-Fi 6 as an auxiliary part, three communication sub-modules are uniformly deployed to realize dead-corner-free coverage of a whole compartment, and a standardized information packet is pushed to passenger mobile equipment in a broadcast or connection mode. The device can replace invalid mobile phone satellite positioning data of a subway underground section, correct navigation software positioning deviation, realize accurate arrival reminding, transfer guidance and emergency information pushing, has the characteristics of low delay, high compatibility, interference resistance, low power consumption and easiness in maintenance, and is adaptive to a complex subway operation environment.

The invention discloses a subway transport capacity resource collaborative optimization configuration method for luggage preposed consignment, and belongs to the technical field of luggage consignment optimization, and the method comprises the following steps: S1, obtaining a complete consignment demand and train transport capacity basic parameter set through a network platform; s2, a station set and a train set used for executing a user luggage consignment task are screened out with the running time of the subway train and the luggage storage facility allocation condition as screening conditions; s3, establishing an integer linear programming model with the goal of minimizing the comprehensive cost of integrating the compartment configuration cost, the residence time cost and the peak penalty cost; and S4, a branch pricing algorithm is adopted, and a luggage consignment scheme with the optimal comprehensive cost is output based on operation constraint conditions related to subway trains and user demands. By the adoption of the method, the contradiction between the requirement for light travel and the requirement for carrying large luggage to go back and forth in a transportation hub is solved, and the resource utilization rate of an existing subway system is increased.

The invention discloses a subway network key station identification method and system considering bus substitution, and the method comprises the steps: respectively constructing a subway weighted network and a bus weighted network with the travel time as the weight based on subway and bus station and line data in a research range; the method comprises the following steps of: screening bus stations in a walking range of a subway station through a spatial connection method, constructing an initial bus alternative network, and optimizing to obtain a final weighted bus alternative network by combining walking time, a passenger walking perception coefficient and an acceptable travel time threshold value; and calculating the betweenness centrality, the proximity centrality and the weighting centrality of each subway station, establishing a comprehensive importance calculation model, and identifying the key stations in the subway network based on the comprehensive importance. The method is used for accurately capturing the trade-off relationship between the importance of the subway station in the network structure and the availability of the bus replacement service, and can provide decision support for emergency plan making of a subway system and connection bus network planning.

The application discloses a handover control method for a subway intelligent station operation management system, relates to each professional technical field applied by an intelligent operation management platform, and realizes comprehensive control on a handover process by combining face recognition technology, handover permission control management and process control technology of digital handover procedures, specifically includes the following steps: step 1, user object modeling facing handover application; step 2, handover operator identity authentication; step 3, work review by a relieving operator; and step 4, the handover operator and the relieving operator respectively log in to confirm the end of handover. By using the method, the working time of manual handover can be effectively reduced, the management difficulty of subway attendants is reduced, the subway operation management efficiency is further improved, and the method has important significance for informatization development of the subway system.

1. Name of the product in this design: Folding Floodproof Door. 2. Purpose of this design: Disaster prevention equipment for subway systems used for emergency isolation during flooding. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.