1490 results about "Urban rail" patented technology

The present invention provides a fault prediction and condition-based repair method of an urban rail train bogie. An optimum service life distribution model of a framework, a spring device, a connecting device, a wheel set and axle box, a driving mechanism, and a basic brake device of a bogie is determined by adopting a method based on survival analysis; a reliability characteristic function of each subsystem is obtained; then, a failure rate of each subsystem of the bogie is calculated by adopting a neural network model optimized by an evolutionary algorithm; and finally, proportional risk modelling is conducted by taking the failure rate and safe operation days of each subsystem of the bogie as concomitant variables; and on the basis of cost optimization, thresholds and control limits for condition-based repair of a bogie system are obtained.

The invention provides an urban rail train regenerative brake energy absorbing and using system. The system comprises an energy feedback inverter, an energy-storing unit, a DC/DC (direct-current/direct-current) bidirectional converter and a direct-current flat-wave capacitor, wherein the direct-current side of the energy feedback inverter and the high-voltage side of the DC/DC bidirectional converter are connected in parallel with the direct-current flat-wave capacitor and are simultaneously connected in parallel with the anode and the cathode of a direct-current bus; the low-voltage side of the DC/DC bidirectional converter is connected with the energy-storing unit; and the alternating-current side of the energy feedback inverter is connected with the low-voltage side of a distribution transformer in a traction substation, and the energy feedback inverter is used for inverting regenerative brake energy on the direct-current bus to be used by electric equipment in the traction substation. The invention also provides a regenerative brake energy absorbing and using method based on the system. The energy feedback inverter and the DC/DC bidirectional converter are coordinated and controlled on the basis of the change status of the voltage of the direct-current bus, the train regenerative brake energy is quickly and fully absorbed, the voltage of the direct-current bus is kept stable, and the utilization rate of the train regenerative brake energy is improved.

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 relates to an urban tram braking system. The system comprises a braking instruction generation system, a braking control system and an anti-skid system, wherein the braking instruction generation system comprises a braking electronic control unit (BECU) and a braking control unit (BCU) and sends a braking instruction to the BECU; the BECU calculates required braking force according to the braking instruction and loading force detected by a loading pressure sensor and provides the braking force for a traction control unit; the traction control unit feeds a dynamic braking force signal back to the BECU; the BECU calculates air braking force which is needed to be supplemented and controls the BCU to generate braking cylinder pressure so as to realize braking control; the braking instruction generation system is provided with a driver controller, an emergency braking switch and a logic control unit connected with the emergency braking switch; the anti-skid system comprises a speed sensor arranged on a wheel axle and an anti-skid exhaust valve arranged on a braking cylinder pipe; the speed sensor detects a speed signal and transmits the speed signal to the BECU; and the BECU controls the action of the anti-skid exhaust valve according to the speed signal.

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 discloses a keyword drive-based automatic test method of urban rail drive control units. The method comprises the following steps: determining a keyword set of a tested object; compiling a test script according to the keyword set; establishing a keyword drive-based automatic test frame and constructing a top layer test data table, a middle layer test data table, a bottom layer test data table and a keyword support library for the automatic test frame; inputting the test script into the automatic test frame, successively calling drives of the layers to inquire the contents in the test data tables on the basis of a test drive engine of the automatic test frame in allusion to each objective keyword in the test script; and calling bottom layer functions of the keyword support library to output a script bottom layer execution sequence file and directly and interactively carrying out test with the tested object. The keyword drive-based automatic test method of urban rail drive control units has the advantages of reducing the skill requirement for the test personnel, being high in test script reusability and good in maintainability and portability, shortening the test script development and maintenance time and reducing the test script development and maintenance cost.

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 provides a layout structure for integration of a train depot and a junction station of an urban rail. The layout structure is composed of the junction station, a main line, a turn line, a release line, a lead line, a testing line, a train washing workshop, a parking train examination shop, a plant un-wheeling repair shop, an internal combustion adjustment engine shop, an engineering garage, related lines and turnout junctions, a comprehensive office building, a hazardous material storage and a guardroom erected on the ground. In the structure, the junction station, the turn line, the release line, a train washing line and the parking train examination shop are arranged in a tandem feed-through manner, a return section train starts from a station and enters the train washing workshop for washing through an entry line, and after washing, the return section train can directly enter the parking train examination for storage or enter the plant un-wheeling repair shop for inspection and repair. The lead line, the internal combustion adjustment engine shop, the engineering garage and the train washing workshop are parallel to each other, and the front and the rear of the line are connected with the entry line. The layout structure has the benefits of compactness and high production and operation efficiency. The testing line departs from a main plant area, and passes through the junction station. The door of the main plant area can be directly opened outwards. The layout structure occupies less space, and achieves high land and space utilization.

The invention relates to an urban rail operation vehicle and in particular relates to a straddle type monorail operation vehicle with a structure comprising two pairs of wheels. The straddle type monorail operation vehicle comprises a carriage, a steering frame, an engine, a transfer case and a walking pump, wherein the steering frame is connected with an underframe of the carriage through a central pin dragging device; the steering frame comprises a framework, a secondary suspension device and a dragging device; the overall framework is of an II-shaped full-steel installed and welded plate type box structure and comprises a side beam, end beams connected to two ends of the upper part of the side beam and two vertical beams which are connected between the end beams; a motor bracket is fixed between the upper part of the side beam and the corresponding vertical beam; two independently-driven walking wheel assemblies are mounted on two motor brackets; four guide wheel assemblies are mounted on two sides of the middle part of the side beam; two stabilizing wheel assemblies are mounted on two sides of the lower part; the secondary suspension device adopts a secondary steel coil spring assembly. The straddle type monorail operation vehicle can reasonably meet the circuit requirements of monorail PC beams and is high in safety coefficient, excellent in dragging performance, simple and compact in structure, easy to maintain, stable in running and excellent in brake performance.

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 relates to a method for realizing automatically compiling train working diagrams of the urban rail train, which comprises configuring basic parameters required by compilation, configuring ideal running intervals of each time period in one day, adjusting ranges of the time periods, determining starting time and terminal time of each running line, pre-connecting the running lines, regulating the starting point according to the number of rolling stock, compiling running lines of entering/exiting the garage of the train, and then diagramming a train working diagram. Compared with the prior art, the method has the advantages that, by regulating the time periods into integral multiple of the running intervals, the balance of diagramming transient running line of the peak hours and the non-peak hours is guaranteed, further, the compiling software is enabled to automatically diagram urban rail train working diagrams with balanced running intervals and capability of furthest meeting requirements of passenger flow in various time periods under restriction of conditions of the number of rolling stock, reentrant time, reentrant mode and the like, thereby significantly increasing the compiling efficiency of train working diagrams to be adaptable to requirements of train working diagram regulation along with variation of passenger flow, technical equipments and transport organizing methods.

The invention discloses an ATO (Automatic Train Operation) speed command optimization method of an urban rail transit train. The method comprises the following steps: establishing a data module for optimizing an ATO speed command; establishing an ATO speed command combination evaluation module to evaluate superiority-inferiority of a current ATO speed command combination; establishing a multi-objective genetic algorithm NSGA-II (Non-dominated Sorting Genetic Algorithm II)-based ATO speed command energy-saving optimization method to determine an energy-saving ATO speed command so as to finally obtain an interval energy-saving ATO speed command set. According to the method, the optimal ATO speed command set of all operation intervals of a metro line can be obtained, the optimization time is greatly shortened, off-line optimization can be performed, on-line optimization can also be performed, the metro traction power consumption is reduced, and a large amount of electric energy can be saved for the urban rail traffic system of China each year.

The invention discloses a method and device for obtaining a wheel set tread contour line of an urban rail train. The device comprises two sets of 2D laser displacement sensors installed on the two sides of a rail in a mirror symmetry mode. The laser detection faces of the two sets of sensors are located on the same plane, and the integral device is lower than the rail surface. The method comprises the steps that after the sensors detect wheels at the same time to obtain detection point coordinates, the output points of the two sets of sensors are combined to a same coordinate system through coordinate transformation and coordinate translation; the x-coordinate value of the right end face of a tread is obtained, and a filtering window is established based on the x-coordinate value to remove interference points of measuring data; the x-coordinate value of the right end face of the tread is obtained, and measured data points are divided into K number sets according to the actual situations; least squares curve fitting is carried out on the data points of each number set; coordinate values of segment points are obtained, and each segment curve is smoothened into an integral tread contour line according to the lagrange multiplier method. The method and device have the advantages of being high in speed and precision, easy to operate, capable of carrying out online non-contact type measurement, and the like.

The invention discloses a railway infrastructure detection system. The system involves a positioning synchronization subsystem, and a rail geometry detection subsystem, a rail contour detection subsystem, a rail state detection subsystem, a rail wheel force detection subsystem, a catenary geometric parameter detection subsystem, a pantograph-catenary current collection parameter detection subsystem which are in communication with the positioning synchronization subsystem. According to the system, on the basis of the structural characteristics and operation modes of urban rail transit infrastructure, the plurality of detection subsystems are integrated on a urban rail transit electric bus, rail geometric parameters, rail contour abrasion, rail state information, rail wheel interaction force, catenary geometric parameters and pantograph-catenary current collection parameters of the urban rail transit infrastructure are synchronously collected and accurately measured, the detection efficiency is improved, the urban rail transit operation maintenance cost is reduced, and the system can be widely applied to urban rail traffic construction and operation and maintenance.

The invention provides a passenger flow estimation system under the condition of urban rail road network emergency. A multi-factor influence impedance calculating method and an effective path calculating method are designed, so that a road network inter-OD multipath distribution ratio is acquired by a system; the passenger flow is loaded according to the distribution ratio; the full state of the passenger flow is acquired through the deduction of the passenger flow in the road network according to a historical passenger flow distribution law at the corresponding period; the influenced passenger flow is selected according to the information about the emergency; after the influenced passenger flow is processed according to a redistribution rule, a passenger flow index is counted and recorded, so that a final calculating result is acquired. According to the invention, the rail transit road network emergency processing capability is increased and the safety of the rail transit is ensured, so that the service level and quality of Chinese urban rail transit are greatly increased and the passenger flow estimation system is a beneficial measure for the life of people.

The invention relates to a composition brake shoe for an urban rail vehicle and a manufacturing method of the composition brake shoe for the urban rail vehicle. The composition brake shoe comprises the following components of, by weight, 10-15 parts of butadiene-acrylonitrile rubber, 10-20 parts of cashew nut shell oil modified phenolic resin, 6-10 parts of basalt fibers, 4-8 parts of carbon fibers, 8-15 parts of steel fibers, 5-8 parts of sepiolite fibers, 2-6 parts of hexamethylenetetramine, 5-8 parts of iron oxide powder, 5-7 parts of crystalline flake graphite, 5-7 parts of chromite, 6-9 parts of barium sulfate, 3-6 parts of potassium feldspar and 5-8 parts of frictional powder. The manufacturing method of the composition brake shoe is a dry method production technology, and comprises the steps of steel back production, abrasive blasting processing, shaping, burdening, mixing, hot compacting, heat processing, subsequent processing, finished product forming and inspection. The manufactured composition brake shoe is inspected through the 1:1 rack test, is excellent in friction and abrasion resisting performance, stable in brake performance, safe and environmentally friendly, and solves the problem that the friction coefficient drops too fast under the conditions of damascene of the composition brake shoe for the urban rail vehicle, hot cracks, hot spots and rain and snow weather.

The invention provides a storage battery and pantograph traced power supply system for an urban rail vehicle, comprising a monitoring module and a controlling module. The monitoring module is used for monitoring the state of the pantograph, the speed of the urban rail vehicle and the state of a high-speed circuit breaker. The controlling module is used for controlling the conversion of the urban rail vehicle from the high-pressure power supplying mode of the pantograph to the power supplying mode of the storage battery when the monitoring module monitors that the pantograph is in the falling state, the speed of the urban rail vehicle is zero, and the high-speed circuit breaker is in the switch-off state and is used for controlling the vehicle to switch from the high-pressure power supplying mode of the pantograph to the power supplying mode of the storage battery; when the monitoring module monitors the interruption of the high-pressure power supplying mode of the pantograph or the urban rail vehicle is in an emergency (enters an area without electricity) so that no other rescuing vehicle needs to be dispatched and the urban rail vehicle can run consecutively under the power supplying mode of the storage battery. Therefore, the rescuing tasks are reduced, the reusing vehicle occupies the main operating rail for a shorter time, and the operation efficiency of the urban rail vehicle is improved.

The present invention provides a suspension type monorail vehicle bogie, and belongs to the technical field of rail transit. In the prior art, the suspension type train bogie has problems of complex structure, poor safety, poor curve negotiating, and high noise during train running. According to the suspension type monorail vehicle bogie, both ends of a frame are provided with a motor installation base, traction motors are fixed on the motor installation bases through bolts, both ends of a coupler are respectively connected with a traction motor output shaft and a gearbox input shaft, walking wheels are connected with the frame through hollow shafts, both sides below the traction motors are provided with a guide wheel, the guide wheels are connected with the frame through bolts, and walking safety wheels and guide safety wheels are arranged respectively corresponding to the walking wheels and the guide wheels. The suspension type monorail vehicle bogie is mainly used for urban rail train driving.

The invention discloses an installation structure of a train roof jumper cable of the urban rail. A first high-voltage connector casing, a first high/low voltage connector, a second high/low voltage connector and a first low-voltage connector casing are positioned in the top of a first compartment; a second high-voltage connector casing, a third high/low voltage connector, a fourth high/low voltage connector and a second low-voltage connector casing are positioned in the top of a second compartment; the first high/low voltage connector on the first high-voltage connector casing is connected to the third high/low voltage connector on the second high-voltage connector casing via the jumper cable; and the second high/low voltage connector on the first low-voltage connector casing is connected with the fourth high/low voltage connector on the second low-voltage connector casing via the jumper cable. The installation structure has the advantages that the operation space is large, the installation environment is simple, and the structure is safer and more reliable; the service life is longer; the cable path is shorter, and the cost is reduced greatly; the sealing performance is higher; the whole installation structure can be dismounted rapidly, the occupation space is small, and the structure is beautiful and tidy; and it is not required to reconstruct end wall and channel structures, the workload is low, and the cost is lower.

The invention relates to a reinforced learning-based urban rail transit ground type super-capacitor energy storage system energy management method. The method comprises two parts which are policy network initialization and online learning. The policy network initialization is to build a multi-vehicle operation scene model by using known line and vehicle information, a pre-compiled train working diagram and practically collected historical vehicle data in urban rail transit, and combine the multi-vehicle operation scene model, a no-load voltage prediction model, a direct current supply load flow calculation algorithm and an approximate dynamic programming algorithm to obtain a policy network which serves as an initial value of an online learning module; the online learning module employs amodel-free reinforced learning algorithm and performs charging and discharging threshold value online adjustment through a super-capacitor intelligent agent trial and error method. The method can perform online learning on super-capacitor energy storage system control policies in urban rail traction power networks, thereby optimizing an energy-saving effect and a voltage stabilizing effect.

The invention belongs to the field of urban rail traffic, and relates to an automatic train route handling method which includes the steps: inspecting train route validity comprising route connectivity requirements and completeness requirements; inspecting triggering opportunities and conditions; inspecting signal conditions; selecting train routes; inspecting route conflict; selecting train routeprotection turnout positions. According to the automatic train route handling method, route triggering opportunities, route selection and conflict detection of a planning train and a heading train are considered, automatic handling of the routes, selection of protection schemes and restarting of signal can be implemented according to dynamic change of station equipment, the automatic route handling intelligent degree of an ATS (automatic tuning system) is greatly improved, and the method is faster, more accurate and more flexible.

The invention provides a passenger flow estimation method for an urban rail road network. By designing a multi-factor affected impedance calculation method and an effective path calculation method, a multi-path distribution ratio between OD (origin-destination) of the road network is obtained, and the passenger flow is loaded according to the ratio. By combining the historical corresponding period passenger flow distribution rule, the total state of the passenger flow is obtained by the deduction of the passenger flow in the road network. By accurately estimating the passenger flow volume of the road network, the safety of urban rail transit is ensured, so that the service level and quality of Chinese urban public transport are substantially improved, and the passenger flow estimation method is a useful measure in favor of people's livelihood.

The invention relates to an overlap triggering method used in an urban rail traffic system based on a destination. The overlap triggering method comprises the following steps of (1) performing system initialization; (2) judging whether a train enters an overlap trigger section or not; (3) judging whether a main access is established or not; (4) judging whether an overlap is established or not; (5) sending an overlap locking request to a train monitoring system ATS through a CI; (6) searching destination information after the ATS receives the request, calculating the overlap locking direction and replying the overlap locking direction to the CI if the destination information exists; (7) judging whether the CI receives the overlap locking information, if so, executing the step (10), and if not, executing the step (8); (8) judging whether preset time t of a timer is up, if so, executing the step (9), and if not, executing the step (5); (9) establishing a default overlap through the CI; and (10) establishing the overlap through the CI according to the destination. Compared with the prior art, the overlap triggering method has the advantages of enabling the train not to wait the overlap unlocking time, effectively improving the operation efficiency and the like.