2285 results about "Urban rail transit" patented technology

The invention discloses a virtual coupling small-group train control system and method based on train-train communication, and is a scheme which guarantees running safety and improves train running efficiency. In the scheme, in a small-group range, a main train continuously detects environment awareness and state data of the main train, environment awareness and state data of a front train are acquired by point-to-point direct communication, a control strategy is formed by comparison calculation according to a calculation result, and a rear train is adjusted to follow the front train within adynamic safe distance. By the strategy, the main train is controlled to follow the front train adaptively, and the trains in a small group can be assisted to cooperatively make correct active train control decision and operation. By the scheme, the running performance of the system can be greatly improved, requirements of flexible operation of urban rail transit can be met well, development spaceand potential are huge, and the virtual coupling small-group train control system and method based on train-train communication are future development tendency and the development direction of an urban rail transit traffic signal system.

The invention provides an urban rail transit panoramic monitoring video fault detection method based on depth learning. The method comprises a data set construction process, a model training generation process and an image classification recognition process. The data set construction process processes a definition abnormity video, a colour cast abnormity video and a normal video in an urban rail transit panoramic monitoring video. A training set and a test set are classified. The model training generation process comprises model training and model test. The model training is to train a fault video image recognition model based on a convolution neural network. The convolutional neural network comprises a plurality of convolution layers and a plurality of full connection layers. The model test is to calculate the test accuracy. If expectation is not fulfilled, the fault video image recognition model is optimized. The image classification recognition process comprises the steps that a single-frame image to be recognized is input into the model, and the fault video image recognition model outputs an image classification result to complete the fault image detection of the urban rail transit panoramic monitoring video.

The invention discloses a system and method for predicating time-varying user dynamic equilibrium network-evolved passenger flow and belongs to the technical field of urban rail traffic safety. The system comprises an AFC (auto fare collection) system, and a video terminal and the like. A network database is sequentially connected with a passenger flow distribution module, a passenger flow correction module and a passenger flow analysis module. The passenger flow video analysis module is connected with the network database module and the passenger flow correction module respectively. The video terminal and the AFC system transmit passenger information data and store the same in a network database. The passenger flow video analysis module analyzes real-time video data, and the passenger flow correction module adopts an AUKF (adaptive unscented Kalman filter) for preprocessing. The passenger flow data are matched and predicated by means of a passenger flow prediction algorithm, and services like an inquiry are provided by a human-computer interaction terminal. The requirements of multiple users for road network short-term prediction under emergency conditions are met, real-time distribution and dynamic prediction for the bounded rationality of the passenger flow are realized, and real-time inquiring, sharing and decision making of enterprises for passenger flow information are met.

The invention claims a computer interlock system and method for controlling urban rail transit signals thereof, which relate to urban rail transit signal control field. The computer interlock system disclosed in the invention at least comprises an interlock control unit and an input and output unit, wherein the interlock control unit carries out a double two out of two interlock logical operation of according to state information of each signal device when receives an interlock operating command, and determines the state information of the signal device to be controlled by the interlock operating command according to the result of the interlock logical operation and outputs to the input and output unit; the input and output unit outputs driving information for controlling the signal device to reach the determined state to the signal device to be controlled by the interlock operating command. The example in the application can guarantee a subway system to operate safely and reliably; and the embodiment in the application is not only suitable for moving block, but also suitable for quasi moving block and fixed block, and is high in flexibility.

The invention relates to a method for constructing a real scene model collaborative design platform of railway engineering. Railway and urban rail transit projects are distributed in a strip shape, engineering data are large, numerous professions are involved, and therefore, the efficient and stable collaborative design platform needs establishing. According to the method, the strip-shaped continuous three-dimensional real scene model is established along the whole range of the project, and fusion processing is performed on all professional three-dimensional building information models (BIM) and the three-dimensional real scene model. Under the management mode of a distributed database, management is performed on a global data base of the three-dimensional real scene model collaborative design platform and special databases of all professional BIM design platforms which only transmit upstream data and downstream data involved in collaborative design and generated BIM three-dimensional design results onto the three-dimensional real scene model collaborative design platform. By means of the method, the strip-shaped project information model along the whole range of the project is established, all professional interactive data are integrated into a continuous three-dimensional real scene, and collaborative design is achieved.

The invention discloses a control system for measuring the energy consumption of urban rail transit and an evaluation method. The control system comprises a vehicle-mounted energy consumption control unit, a data management unit and a ground energy consumption control unit. The control system has the beneficial effects that the system is a multi-path sampling energyconsumption metering system; drive control is carried out by adopting a permanent-magnet synchronous DC motor; a double-energy control module is built by using a super capacitor and a lithium battery for vehicle-mounted energy conversion control; train force analysis and modeling are not needed; a large quantity of nonlinear analysis or intelligent optimization calculation is not needed; traction energy consumption, regenerative braking energy and auxiliary energy consumption can be measured and monitored by directly utilizing collected voltage and current data; the control system has the functions of real-time storage and display of energy consumption data; the energy consumption data can be uploaded to the ground energy consumption control unit through the data management unit; the labor cost is reduced; the control system has a fault detection function; and the fault can be accurately reported when the system fails.

The invention discloses a staged multi-path model algorithm of urban rail transit network passenger flow distribution. The algorithm comprises the following steps of: dividing definite factors and indefinite factors affecting the outgoing of passengers into two stages to calculate and correct the passenger flow distribution proportion of a path, determining the initial distribution proportion of the passenger flow on the path by using the comprehensive outgoing impedance of time unit as a main factor, and correcting the proportion by considering the transfer times and the crowdedness degree on the basis of time window constraints according to a generated full origin-destination (OD) passenger flow distribution path set. The model and the algorithm provided by the invention have higher reasonability and practicability and can effectively serve the passenger flow management of the urban rail transit, meet the service requirement of clearing automatic fare collection (AFC) passenger flow and fare, and provide auxiliary decision proof for operation organization optimization and coordination.

The invention discloses a fire linking control system applied to urban rail transit and a method. The fire linking control system comprises a main control system, a fire automatic alarm system, an electromechanical device monitoring system, a communication system, an intelligent low-voltage system, a ventilating air conditioning system and the like; the fire automatic alarm system is used for realizing fire detection and alarming, judging whether a fire accident arises and the detailed location of the fire accident; the fire automatic alarm system selects a corresponding fire mode instruction according to environmental control requirements provided by the ventilating air conditioning system and different fire accident locations; the electromechanical device monitoring system receives and analyzes the fire mode instruction and drives fire fighting apparatuses to operate according to a predefined mode so as to execute a corresponding fire fighting mode. The fire linking control system can greatly increase the coordination linkage capability of fire fighting, save the response time of fire fighting, imorove fire fighting efficiency and enhance the reliability and stability of a fire fighting system.

The invention relates to a system for recovering vehicle braking energy in urban rail transit, which comprises a first direct-current high-speed switch, a charging circuit unit, a super capacitor array, a discharging circuit unit, a variable pressure stabilizing unit, a second direct-current high-speed switch, a DC / AC converter, an alternating-current high-speed switch and an ACU auxiliary control unit; when the vehicle brakes, the system determines the storage energy in the supercapacitor array through the ACU auxiliary control unit and switch with a major loop in real time. Compared with the prior art, the system effectively utilizes energy and reuses the recovered energy in air conditioning or lighting, etc. inside the carriage; the system solves the network voltage fluctuation problem of the prior vehicle regenerative braking energy recovery, and forms an energy recovery closed-cycle control system of the vehicle itself as the main body; in addition, the system cannot impact the network voltage, but only absorb the energy of the self motor train unit; as the supercapacitor used by the system has small size, the management and control of the power source is easier, and the installation mode is more flexible.

The invention discloses an intelligent transport system for an urban railway based on safety communication. The intelligent transport system for the urban railway comprises a DCS (data communication system), an ATS (automatic train supervision), an ATP (automatic train protection), an ATO (automatic train operation), a DTO (driverless train operation) and a MMS (maintenance management system), wherein the ATS, the ATP, the ATO, the DTO and the MMS realize the network connection through the DCS. The intelligent transport system for the urban railway has the advantages that the proper Internet storm influence of a CBTC (communication based train control) is favorably overcome, the safety problem of the train-ground wireless communication is favorably solved, the man-machine interface of the CBTC is favorably unified, the linkage efficiency among the systems under the emergency condition is improved, the ease maintenance of the system is enhanced, and the complete network operation scheme is provided.

The invention discloses a method for predicting the influence of a heavy passenger flow of an urban rail transit network, which comprises the following step: (1) constructing an abstract model of the urban rail transit network; (2) generating a heavy passenger flow event; (3) setting the passenger flow ratio of a destination station / source station of a heavy passenger flow; and (4) analyzing the influence of the heavy passenger flow on the network. The method can be applied to the development of an urban rail transit network heavy passenger flow organization simulation system. The system can be used in an emergency handling center of the urban rail transit network to realize the automation and intellectualization of the analysis on the influence of the heavy passenger flow event and emergency handling. Meanwhile, the system is often used by an emergency handling department in a daily emergency monitoring process for simulating the handling process of the heavy passenger flow event anddeveloping the emergency handling capability of emergency handling personnel, and the system obtains good actual effect and enterprise benefit.

The invention relates to an automatic train protection system and method based on image identification and multi-perception fusion. The automatic train protection system comprises an image collection unit (1), an image processing unit (2), a multi-perception fusion processing unit (3), an auxiliary perception unit (4) and an early warning result output unit (5), wherein the image collection unit (1), the image processing unit (2), the multi-perception fusion processing unit (3) and the early warning result output unit (5) are connected in sequence; the auxiliary perception unit (4) is connected with the multi-perception fusion processing unit (3). Compared with the prior art, the automatic train protection system and method based on image identification and multi-perception fusion can be adapted to complex conditions appearing in urban mass transit operation lines, the safe protection of a train is automatically realized according to the practical condition of a line, and the operation safety of urban mass transit is greatly improved.

The invention provides an urban rail transit passenger flow analysis method based on AFC (Automatic Fare Collection) passenger ticket data. The method comprises the following steps: on the basis of historic passenger ticket data of an urban rail transit AFC system, systematically analyzing spatial and temporal distribution character of the urban rail transit passenger flow on the aspects of three levels such as stations, routes / intervals and road networks in combination with an urban rail transit network and an actual train working diagram; and meanwhile, providing a two-dimension / three-dimension visualization technology and a reappear technology of process evolution for the passenger flow spatial and temporal distribution. The method provided by the invention has the relatively good advancement, practicability and universality, the spatial and temporal distribution character of the urban rail transit network passenger flow can be comprehensively mastered from different levels systematically by using the method so as to provide good scientific data and support evidence for the operation management and organization optimization of the urban rail transit, and provide efficient technological approaches for reappearing the spatial and temporal distribution evolution process and researching the passenger flow evolution rule of the urban rail transit network passenger flow.

The invention discloses an equal interval regulation method of an urban rail traffic train, which comprises the following steps of: 1) determining the incoming sequence of trains in each block section between stations to the nearest railway platform in the front part, and correspondingly forming train incoming arrays; 2) finding the train incoming array with the most trains, and selecting a reference train; 3) sequentially calculating the planed incoming time from the first train of each train incoming array in the front part to the planed incoming time to the nearest railway platform in the front part starting from the train incoming array of the reference train; 4) calculating the early and late deviation of the train when any one train reaches the railway platform, executing the step 5) if the early and late deviation is zero, regulating the stop time of the train at the railway platform and the operation time in a next block section of the train if the early and late deviation is not zero so that the early and late deviation of the train reaching a next railway platform can be reduced, and then executing the step 5); and 5) updating the planed arrival time of the adjacent train behind the train reaching the railway platform when the train leaves the platform, and going back to executing the step 4). The regulating efficiency of the method of the invention is high.

The invention provides an operation coordination optimizing method of common public transit connecting with urban rail transit and a system thereof. By counting with mathematical statistics, coordination transfer rate and passenger transfer cost under each transfer mode are obtained, a multivariable operation coordination optimizing mode which aims at the least mass cost of the transit system total cost which comprises operator cost and passenger travel cost is built, and an algorithm with a genetic algorithm based on Powell is optimized. The system comprises a GIS map reading and transit line identification procedure module, a transit system data inputting procedure module, a transit system cost analyzing procedure module and a transit system optimization processing procedure module. The invention solves the problem of the operation coordination of the urban rail transit and the common public transit, so as to improve the scientificity and the effectiveness of transit network operation. Simultaneously, the system has simple input and increases the convenience of operation coordination work.

The invention belongs to the technical field of urban mass transit and particularly relates to an energy-saving method of train operation of the urban mass transit. The energy-saving method comprises the steps of 1, analyzing operation matching rules of adjacent trains and computing the size of utilized regeneration energy; 2, establishing an optimization model of the train operation by taking the utilized regeneration energy as the target; 3, solving the optimization model to obtain an energy-saving time table of the train operation of the urban mass transit. By means of the energy-saving method, energy consumption during train operation is reduced, and security of an overhead line system is improved. Furthermore, the energy-saving method has the advantages of (1) being high in operation speed and applicable to large-scale computer simulation by adopting an integer programming method; (2) considering comprehensive factors, being high in modeling accuracy and strong in applicability of the planned operation time table; (3) being capable of embedded into hardware of a train energy-saving driving auxiliary system in an online mode, easy to implement, low in cost and wide in application range.

The utility model provides an urban rain transit signal maintenance supporting system, which comprises equipment centralized stations, car depots, parking bays, mobile servicing system (MSS) station equipment arranged in a control center on an urban rail transit line. MSS line maintenance center equipment arranged in the line maintenance center of the urban rail transit line communicates with all MSS station equipment on the rail transit line. MSS net maintenance center equipment arranged in the net maintenance center of the urban rail transit line communicates with all MSS line maintenance center equipment on the urban rail transit line. The system is important running equipment for guaranteeing running safety, enhancing signal equipment combination part management, monitoring the status of signal equipment, finding potential hazards in the signal equipment, analyzing fault causes of the signal equipment, assisting with fault handling, guiding field maintenance, reflecting equipment application quality and improving the maintenance level and the maintenance efficiency of signal departments.

The invention provides a passenger volume prediction method of urban rail transit. The passenger volume prediction method comprises the following steps: accounting OD (Origin-Destination) distributionmatrices based on current time of target rail transit lines; acquiring a passenger volume prediction model by building and using historical OD distribution matrix training of the target rail transitlines according to a prediction requirement; and predicting the passenger volume of specified road sections of the target rail transit lines in a prediction time period. According to the passenger volume prediction method of the urban rail transit disclosed by the invention, passenger volume prediction processes can be effectively simplified, calculation speed and calculation precision are improved, and a powerful support is provided for reasonably carrying out management and dispatching of transport in time.

The present invention provides an AFC data based urban rail transportation real-time passenger flow prediction method and system, which are capable of improving the accuracy and real-time property of AFC real-time passenger flow prediction and the precision and visual degree of real-time passenger flow prediction. The method comprises: according to established AFC real-time passenger flow data abnormality determination and correction mechanism, determining whether acquired AFC real-time passenger flow data of each station is abnormal, and if so, performing correction; according to the corrected AFC real-time passenger flow data within a certain operating time period and a corresponding inbound amount within a same operating time period of a same historical period of each station, predicting an inbound amount of each station within a certain operating time period in the future; predicting OD (Origin Destination) distribution under each time granularity; and performing passenger flow allocation based on the predicted OD distribution amount under each time granularity, and establishing a forecasting and acknowledgement system for an urban rail transportation passenger flow real-time state, and an urban rail transportation real-time passenger flow analysis and decision system based on a B / S architecture. The AFC data based urban rail transportation real-time passenger flow prediction method and system provided by the present invention are applicable to the technical field of intelligent traffic.

The invention discloses a city railway transport vehicle scheduling management and running chart display method comprising the following steps: configuring basic time table elements needed by mapping, setting up city railway transport line data, standard intersite running time, standard stop time and return information in a system data base; 2, generating vehicle scheduling, and storing same in a system real time data base; 3, building up a real time table, and storing same in the system real time data base; 4, forming a predication time table, and storing same in the system real time data base; 5, drawing a vehicle scheduling running chart, a real running chart, and a prediction running chart; 6, calculating an adjusted vehicle scheduling; 7, updating the vehicle scheduling in the system real time data base. The method can improve network utilization rate and date access efficiency, can improve running chart drawing stability and instantaneity so as to meet the demands that the city railway transport train operation needs to be adjusted according to changes of passenger flow and transport organization method.

The invention discloses a switching method for interconnection and intercommunication of a CBTC system and a CTCS system. A switching transition area is arranged, two sets of vehicle-mounted equipmentof different systems are arranged on a train, the train crosses the switching transition area to complete switching of a control system, and a switching solution is provided for a scene where a mainline railway and urban rail transit are connected; the devices of the CTCS and the CBTC can be interconnected and intercommunicated through a switching scheme, so that a solution is provided for the integrated high-frequency subway part of the trunk line railway, and a possible development direction is provided for long-term fusion of the CTCS and the CBTC technology.

The invention discloses a temporary speed limiting method in an urban rail transit CBTC (communication based train control system) mode. The temporary speed limiting method includes starting normal route control after uploading and confirming temporary speed-limiting information before power interruption through a data storage unit, uploading the temporary speed-limiting information periodically to an automatic monitoring system from the data storage unit, performing interactive confirming twice between the data storage unit and the automatic monitoring system, dividing the temporary speed-limiting information and then downloading the same through the data storage unit, receiving the temporary speed-limiting information and feeding the information back to the data storage unit and then downloading movement authority speed-limiting instructions by zone controllers, saving feedback results by the data storage unit, and performing speed-limiting brake to trains through an automatic protection system. With the temporary speed limiting devices in the urban rail transit CBTC mode, the defect that effective speed limiting can be carried out by completely depending on real-time communications between dispatchers and drivers in the conventional speed limiting measures is overcome, the safety coefficient is increased, and running safety is guaranteed. The invention further discloses a temporary speed limiting system.

The invention discloses an urban rail transit network passenger flow limiting method. The method comprises steps that model hypothesis is carried out; an urban rail transit network model is established; original data collection and processing are carried out; virtual running lines are constructed; network passenger flow distribution is carried out; the network passenger flow is converted into theroute passenger flow; the virtual running line passenger flow is matched to the actual urban rail transit road network; the commercial optimization solver software is utilized for solution; the totalcontrol flow rate, the control flow number, the time section control flow condition and the optimal strategy for coordinated flow control of stations in the rail transit network in the integral morning peak of the stations in the rail transit network are acquired. The method is advantaged in that the number of inbound passengers, the number of passengers waiting on platforms and the carrying capacity of each train in each time section of the rail transit network can be obtained, and the theoretical basis can be provided for developing traffic flow control measures in the rail transit network.

The invention belongs to the technical field of materials, and particularly relates to a hybrid fiber reinforced friction material for train braking and a preparation method thereof. In the invention, a composite modified phenolic resin is used as an adhesive, and hybrid fibers, including carbon fiber, metal fiber, inorganic mineral fiber and the like, are used as the reinforcing fibers. Compared with the prior art, the invention improves the contour machining property of the organic synthetic brake, and the yield of the material is high; the brake has stable frictional property at different braking speeds, does not has obvious degradation of frictional property at high speed, and does not have the phenomena of shedding and cracking on the working surface after the braking test. The friction material provided by the invention can be widely used for manufacturing brake pads, brakes, brake shoes and the like in braking systems of passenger and freight trains, municipal rail transportation, subways and the like.

The experiment platform includes experimental solid model of underground in 1:5 large scale, fire source system, ventilation and smoke extraction system, fire detection alarm system, experimental measurement and collection system, and data analytic system. Structure of multistory building of the solid model includes interzone tunnels, platforms, station halls and facility rooms etc. Modularized design is adopted. Fire source system can simulate different scenes of fire, and generate hot smoke gas of fire nigh true. Power and fuming quantity of the fire source system is determined based on theoretical analysis from model similitude. The experiment platform can generate growth curve of different power of fire. The experiment platform is in use for carrying out experimental studies: happening and growing mechanism of fire, and poison gas outspread inside stations of underground as well as control technique. The invention is applicable to different structures of station.

The invention discloses an urban-railway-system train intelligent control method based on driving experience and online study. The method obtains output of a controller through simulation of a driving strategy of an experienced driver, use of real-time data of train operation and reasoning and induction, and uses real-time information and speed-limit information of the trains to reasonably distribute the remaining time of train operation so that a time precision estimation value and a speed estimation value are obtained, and based on an MTDA algorithm of the real-time information, the method uses a train operation limit speed and current position, speed and time to deduct an expectation operation time and an expectation operation speed of train operation. Compared with a simulation result of automatic train operation (ATO) of a Yizhuang line of the Beijing city, the intelligent control method is capable of saving energy and improving on-time performance.

The invention discloses a calculation method oriented to single-train running energy consumption of urban rail transit in the field of evaluation of electric traction train energy consumption of urban rail transit. The method comprises the steps of firstly establishing a train traction model by analyzing car performance, line conditions and a signal system, and calculating the instantaneous power and the accumulative energy consumption of a traction system based on the running speed, the running position and the running time of a train; then establishing a train auxiliary system model by analyzing car configuration equipment, and calculating the instantaneous power and the accumulative energy consumption of an auxiliary system based on elements such as rated power and running time; and finally calculating the total running energy consumption of a single train based on traction energy consumption data and auxiliary energy consumption data. The calculation method disclosed by the invention can be used for respectively calculating the energy consumption of the train traction system and the auxiliary system. When train parameters or the line conditions are changed, the train running energy consumption can be more flexibly calculated by using the method.

The invention is a method for analyzing the turning-back capacity of rail traffic lines, adopting simplified line layout and simplified train running time-distance sketch map to analyze constraints between trains: by setting a margin for each constraint, not only able to obtain turning-back interval but also able to obtain the margin of each constraint; listing the constraints according to the stay time in station and the stay time in turning-back region, thus not only able to obtain the current adopted time margins of the stay time in station and the stay time in turning-back region; the running time ti / Ti of train at each key point is extracted by a method of generating line synthesis speed limiting curve on the development diagram of turning-back lines, generating V-S and T-S curves by computer simulation. And the analyzing method is simple and visual, not only improving analyzing completeness and accuracy but also largely reducing workload of analyzers by computer simulation.

The invention relates to the technical field of urban rail transit and transportation and provides a real-time rail transit passenger flow prediction and passenger guiding system.The real-time rail transit passenger flow prediction and passenger guiding system comprises a station passenger flow operation module for reading the number of passengers entering stations, substituting a Poisson model and performing accurate calculation to obtain the true number of passengers entering the stations, a train carried passenger operation module for reading an operation planning map of trains running on the same day and calculating the actual passenger capacity and the number of passengers waiting for the trains when the trains arrive at the stations, and a station stranded passenger operation module for calculating the number of stranded passengers at each station and calculating the load factor of each station of running routes of all trains, wherein if the load factors of middle stations of the routes are 1, it is indicated that the trains running along the routes are full, the stations at full strength and the number of stranded passengers at the current stations are displayed on a large screen in real time, and alternative trip plans leading to all destinations are provided.The real-time rail transit passenger flow prediction and passenger guiding system can predict stranded passenger flows at stations, takes preventive measures, avoids passenger stranding, reduces the peak pressure of rail transit and makes citizens' trips more convenient and safer.