553 results about "Railway system" patented technology

A railroad traffic control system that links each locomotive to a control center for communicating data and control signals. Using on-board computers, GPS and two-way communication hardware, rolling stock continuously communicate position, vital sign data, and other information for recording in a data base and for integration in a comprehensive computerized control system. The data base includes train schedules for real time display on train monitors. The current position of each train is compared to its planned schedule online to provide immediate information to the dispatcher to determine whether a corrective action is necessary. When a train's deviation from its planned schedule exceeds a predetermined parameter, the system automatically calculates alternative schedules for all trains in the system according to preselected operational constraints as necessary to minimize the effect of the deviation.

A self-powered railroad system (1700), in one embodiment, comprises a locomotive (1710), a control source (1715), and a plurality of load units (1720A-K and 1730A-G), some of which are railroad vehicles (1720A-K) comprising the components of railroad vehicle (1500) that provide for selective operation in a motoring mode, a coasting mode, or a dynamic braking mode. The self-powered railroad system may also comprise a control source and at least one railroad vehicle controlled by the control source, such as for coupling, uncoupling, and moving to or from a loading dock.

There is provided a PET-MRI hybrid apparatus and method for integrating a PET image and an MRI image so that anatomical, hemodynamical and molecular information on human tissues are simultaneously presented in a single image. The PET-MRI hybrid system comprises a first scanner for obtaining anatomical and hemodynamical information, and a second scanner for obtaining molecular and functional information on the human tissues. Along a path between the first scanner and the second scanner, a transferring railway system which includes runs, and a movable bed for supporting a subject installed on the railway. The PET-MRI hybrid system also comprises a “RF+ magnetic” shield and a “magnetic” shield between path between the first scanner and the second scanner, which switch between an open status and a close status in a completely synchronized manner to assure a complete magnetic shield for the PET system at any given time. The subject is fastened on the bed and transferred along the railway between the first and second scanner to provide accurately fused MRI and PET images.

Track and track/vehicle analyzers for determining geometric parameters of tracks, determining the relation of tracks to vehicles and trains, analyzing the parameters in real-time, and communicating corrective measures to various control mechanisms are provided. In one embodiment, the track analyzer includes a track detector and a computing device. In another embodiment, the track/vehicle analyzer includes a track detector, a vehicle detector, and a computing device. In other embodiments, the track/vehicle detector also includes a communications device for communicating with locomotive control computers in lead units, locomotive control computers in helper units, and a centralized control office. Additionally, methods for determining and communicating optimized control, lubrication, and steering strategies are provided. The analyzers improve operational safety and overall efficiency, including fuel efficiency, vehicle wheel wear, and track wear, in railroad systems.

A sensor node configured to acquire sensor data on one or more properties of a railroad environment, wirelessly transmit data related to the property(ies), and generate sufficient power to operate the sensor node without access to any additional power sources is provided. The sensor node can be deployed as part of a group of sensor nodes, which provide data for use by a railroad system in monitoring and/or controlling the railroad environment. In this manner, various properties of the railroad environment can be monitored without requiring significant wiring to the various sensor nodes.

A firearm handguard having two identical halves, or half guards, can engage the barrel nut of certain firearms to thereby provide a mounting rail system. The barrel nut attaches the barrel to the receiver. The half guards can be separately positioned in engagement with the barrel nut before fastening them together. The fastening operation can cause the half guards to clamp onto the barrel nut. Alternatively, the front handguard cup of some firearms can prevent the handguard from slipping forward while the rear barrel nut engagement prevents handguard rotation. Free floating variants, however, must clamp onto the barrel nut.

An exemplary parallel hybrid power filter apparatus for the electrified railway is described. The apparatus may include a group of LC reactive filter being purely tuned, an additional inductance, an active power filter and a coupling transformer. The active power filter may be controlled, e.g., as a current source in a composite control manner and can be connected in parallel to the additional inductance via the coupling transformer. The power filter can be connected to the reactive filter in series to form the parallel hybrid filtering system, and may be connected to the power grid via the circuit breaker or a thyristor. This exemplary system can be installed either in the traction substations or in the locomotives directly, or performed by ameliorating the original reactive filter. The active power filter does not add significant amount of cost, and may be simple and reliable in a control manner for the capacity of the APF is so small as to be less than one percent of that of the harmonics source. The power filter can also inhibit the impact of the “background harmonics” of the electrified railway on the reactive filter, and prevent the reactive filter and the grid impedance from resonance.

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 railway photovoltaic energy storing system and control method for regenerative braking energy recovery. Real-time online detection and processing are carried out on all kindsof running data of a photovoltaic side, traction side and energy storing side, a comprehensive judgement is carried out on running conditions based on a calculation result, control schemes under multiple scenes are selected through a judging result, an energy storing unit is taken as an energy transferring station, the coordinated control of a back-to-back converter, photovoltaic power generationunit and energy storing unit is achieved, and the electric energy elective exchange under the multiple scenes is completed. The system and method are conductive for photovoltaic power energy nearby consumption and railway system green development, can effectively recover the regenerative braking energy of haulage motors and the photovoltaic power energy which cannot be consumed, increases systemeconomic benefits, stabilizes photovoltaic side output and power energy fluctuation of the traction side under the regenerative braking conditions, and compensates for negative sequence functions of atraction power supply system.

An embodiment of the invention provides a method for controlling access to content in a social networking website, wherein a connection is established between a first user and a second user on the social networking website. Content on the profile pages of the first user is categorized into a first content category and a second content category. The first content category includes content created before the connection between the first user and the second user was established. The second content category includes content created after the connection between the first user and the second user was established. Content in the first content category is also categorized into a first subcategory and at least one second subcategory. Access by the second user is restricted to the first content category. Specifically, the second user is prevented from viewing content in the first subcategory and permitted to view content in the second subcategory.

The invention provides a temporary speed-restricting command sending method and device of a C3 system. The method comprises the following steps: a TSRS (temporary speed-restricting server) receives a temporary speed-restricting command issued by a CTC (centralized control); and a TSRS performs automatic splitting according to starting points in speed-restricting areas, final points in the speed-restricting areas and the speed-restricting control range of all TCCs (train control centers) and/or RBCs (radio blocking centers) on railway lines corresponding to the line numbers, and sends corresponding speed-restricting commands to all the relevant TCCs and/or RBCs, C2 speed-restricting information is transmitted to C2 vehicle-mounted devices by the TCCs through an active transponder, and C3 speed-restricting information is transmitted by the RBCs through a GSM-R (global system for mobile communications for railway). According to the invention, the TSRS is arranged in a railway system, andacquires the temporary speed-restricting commands by virtue of being connected with the CTC, the temporary speed-restricting commands are distributed to the relevant TCCs and RBCs to realize automatic distribution of all the TCCs and RBCs in the whole-line control range and the centralized management of the train control speed-restricting commands; and the C2 and C3 speed-restricting commands canbe set and canceled simultaneously by the TSRS so as to contribute to guaranteeing the consistency of the two train control systems.

The application discloses a downlink communication method in a high speed railway system and a device thereof. The method comprises the following steps: a, as for each user equipment UE and network side which need to transmit business data at present in a cell, a RRU with the highest current uplink received signal strength is selected as the RRU used for business data transmission from all RRUs covering the UE; on the selected RRU, the business data which needs to be transmitted currently and a user dedicated reference signal DRS corresponding to the business data are sent to the user equipment; and on each RRU in the cell, control data which needs to be transmitted currently is respectively sent to each UE in the cell; and b, the UE respectively carries out frequency offset estimation and compensation and corresponding data detection processing on data received on a traffic channel and a control channel. By the method provided by the invention, the influence of Doppler frequency offset on distributed high speed railway system performance can be reduced effectively.

The invention belongs to urban railway system vocation education equipment which can realize multi-type failure simulation of a metro passenger car door system and bidirectional communication linkage based on analog simulation software. The analog simulation software can set a failure to an experiment table and also can collect the state of the experiment table to realize structural dismounting, a work principle and an overhauling flow in a three-dimensional manner. The method and the device disclosed by the invention can be used for realizing practical training, checking and scientific researches of the metro passenger car door system. The whole device comprises six parts including a passenger car door assembly experiment table, an integrated array type control and collecting module, an embedded type handheld failure simulation terminal, a handheld failure setting device, a connecting wire, a data conversion connector, a main control computer, and analog simulation and control software. The type of simulated failures comprises an EDCU (Electronic Door Control Unit) failure, short circuit, open circuit, earth connection, deadlock, an intermittent failure, device damages, signal interference and the like. The method and the device can be used for researching a car door clamping force, a bypath door control line and the like.

The railway system has a DC voltage catenary (20) connected to a rectifier bridge block (40) that is in turn connected to a transformer (30) joined to a three-phase AC grid (10). The device (50) has a first DC/DC voltage raising block (51) connected between the catenary (20) and an intermediate bus that is connected to a second DC/AC three-phase current generation block (52) joined to the transformer (30). The first block (51) allows raising the DC voltage of the catenary (20) generating a controlled voltage with which the second block (52) generates a high-quality three-phase current that is delivered to the grid (10).

The invention discloses a train operation optimal control simulation method and system for an urban railway system. The method comprises the following steps: detecting the speed and location of a train at the current time step; determining the distance between the train and a tracking target; calculating the optimal target speed of the train according to a speed optimization algorithm; and calculating and updating the acceleration of the train as well as the speed and location of the train at the next time step. The system comprises a vehicle-mounted device, and the vehicle-mounted device is provided with a subsystem used for calculating the optimal target speed of the train according to the speed optimization algorithm. The method and the system provided by the invention are used for optimizing the running speed curve of the train and realizing low consumption and punctuality of train operation.

Through the use of a rail system having spaced apart rails tracking above and along a roadway with arcuate guides associated with each rail and a cone magazine sequentially delivering traffic cones in a horizontal position between the rails in front of the arcuate guides, each horizontally disposed cone will be brought to an upright position when the top of its base contacts the guides as a result of friction with the roadway of one edge of the base of the traffic cone and movement of the guides with the rails. In one embodiment the magazine includes a mechanical arm with a cone clamp at its distal end, arranged to move the cone clamp from a cone storage to a location between the rails to sequentially deliver cones to the rail system. An auxiliary system is provided to reposition upright traffic cone from the rail system in a taper for closing off access to roadways. The arcuate guides can be removed, after which the rail system can be used to collect traffic cones by sequentially knocking them down between the rails and employing the arm with the cone clamp to sequentially transport such cones from a location between the rails to a cone storage in the magazine.

The invention discloses a system for compensating the combined negative sequence current of a power regulator and a static var compensator. The system consists of a railway power regulator and the static var compensator. The railway power regulator is installed between two power supplying arms at a secondary side of a traction transformer by two single-phase three-winding reducing transformer. Thestatic var compensator consists of two groups of thyristor switched capacitors which are connected in parallel and a group of thyristor controlled reactors. The thyristor switched capacitors and thethyristor controlled reactors are respectively connected with two traction power supplying arms by single-phase three-winding reducing transformers, wherein the thyristor switched capacitors are installed below the single-phase three-winding reducing transformer which is connected with the power supplying arms with relatively advanced voltage phases, and the thyristor controlled reactors are installed below the single-phase three-winding reducing transformer of the power supplying arms with relatively hysteretic voltage phases. The system can maximally reduce the capacity of the railway powerregulator while also satisfying the requirement of a railway system on the unbalancedness degree of three phase current.

An improved rail system fuel tender for use with one or more railroad locomotives capable of transporting a plurality of fuel containers suitable for containing pressurized fuel and suitable for directly fueling the one or more locomotives. The improved fuel tender may be powered by the locomotives to increase tractive effort, and the fuel containers may be separately fillable and separately removable from the fuel tender.

The invention discloses a method and a system for analyzing the outlet/inlet section line capacity of an urban railway system. The method comprises the following steps of: (S1) determining line data, train data and signal system data and dividing a line into a plurality of intervals; (S2) simulating various tracking conditions in the running of trains according to the data and recording the time of all trains of clearing timing points to obtain the running time of the trains between the timing points; (S3) calculating outlet section traveling intervals under different tracking conditions according to a simulating result, calculating a final outlet section traveling interval according to the outlet section traveling intervals to obtain the outlet/inlet section line capacity of the trains, the reserved capacity and a station stopping time maximum value; and comparing the obtained parameters with running requirements as well as analyzing, and outputting a final analysis result. The method and the system improve the scientificity, the comprehensiveness and the accuracy of analyzing the outlet/inlet section line capacity, realize the automation of the analysis process of the outlet/inlet section line capacity and save the labor force.

The invention discloses an evaluation method applied to the field of risk analysis of a railway signal system. The method comprises the steps of firstly, formulating the levels of risk of the railway system, expressing a cloud model for evaluating the levels of risk by a forward cloud generator of a MATLAB simulation software, and generating a standard risk grade evaluation set cloud model figure; marking the failure mode of a function by an expert according to the formulated levels of risk to obtain a risk factor set, and converting the risk factor set into a comprehensive evaluation matrix R; utilizing an analytic hierarchy process to obtain risk factor set weight coefficients corresponding to all parameters in the risk factor set by the expert, and calculating a comprehensive evaluation result cloud model figure by fuzzy synthetic operator; comparing the comprehensive evaluation result cloud model figure with the standard risk grade evaluation set cloud model figure to obtain the level of risk of the comprehensive evaluation result. After the method is adopted, the risk evaluation result is more objective and accurate.

Systems and/or methods for reducing problems associated with the train/railroad systems are provided. In certain example embodiments, a system and/or method is provided wherein a sensor monitors a particular area (e.g. a train/railroad crossing, a tunnel entrance or exit, etc.) and transmits data (e.g. an image and/or video) to a train as it approaches the monitored area (e.g. when it is within a predetermined distance of the monitored area). In certain example embodiments, the sensor may be enclosed within a housing to prevent damage thereto. A display within the train may indicate whether or not there is a problem at the particular monitored area (e.g. a blockage at a crossing, a cave-in at a tunnel, etc.). Multiple images corresponding to multiple areas may be displayed, and may be ordered, for example, to the train. The conductor of the train may take appropriate action to avoid accidents and/or to reduce the impact of inevitable accidents (e.g., by stopping the train or reducing speed).

The invention discloses a test simulation system for rail structures of high-speed railways and a urban railway system. The system is based on a finite element theory to establish models of rail structures and various components, and highly simulates indoor test and field test conditions; and the system simulates conditions of key components of a rail and whole rail structures such as stress and deformation under various loading conditions by replacing and combining different types of components, and arranges and analyzes obtained simulation test data to generate vivid animation for demonstration. The system solves the problems existing in actual tests that test equipment and test components have high manufacturing cost, the test process is relatively complicated and tedious and is susceptible to external environment, huge test expense and human capital investment are needed and the like by constructing a friendly human-computer interaction platform to simulate indoor tests and field tests of the rail structures and the components. The simulation system can provide an economical, quick and vivid simulation test and demonstration platform for related scientific research and teaching of the high-speed railways and the urban railway system.

The invention discloses a train conflict predicting and solving method based on a time colored Petri network. Through the method, first, the real-time state data, the train number, the path and the arrival and departure time of a train running in a railway system at the moment are acquired; according to a railway road network, a time colored Petri network model of the railway road network is established. Then, on the basis of the established time colored Petri network model, the future state of a train group is deduced, and whether potential conflict happens or not is detected; after conflict is detected, the optimal or quasi-optimal solution for solving the running conflict of trains is searched for through a heuristic search algorithm based on a Petri network reachability tree, and a train running scheme is adjusted according to a train conflict solving result. On the basis, whether a new training running scheme is feasible or not is verified through the time colored Petri network model so that it can be guaranteed that there is no conflict in the actually-executed running scheme.