90 results about "Communications-based train control" patented technology

The invention discloses a CBTC (communication-based train control) system based on train-train communication. The CBTC system comprises an intelligent train monitoring ITS system, an object controller, a train management platform TMC, a data communication system DCS and an intelligent vehicle-mounted controller IVOC arranged on every train. The CBTC system disclosed in the invention can reduce the ground device and cancel the ground ATP, interlocking and other devices; the IVOC can autonomously calculate the movement license and plan the driving path through information interaction with the IVOC, OC and ITS systems of front and back trains; the ITS system can automatically generate the train running control information based on the site condition to lighten the work load of an operation dispatcher, and promote the operation efficiency and service level, and send to the IVOC; The TMC acquires the limiting-velocity information of the line and sends to every train on the line, thus the safe protection of the train is realized.

A method is provided for detecting broken rail, track continuity, and track occupancy ahead of or behind a railroad vehicle traveling in fixed-block territory equipped with an AC track code wayside signal system or cab signal overlay system, and a communications link. This method, when used as an integral part of a communications-based train control (CBTC) or positive train control (PTC) system, allows immediate, automatic detection of broken rail, track occupancies, or open turnouts ahead of or behind a train in an occupied block. It also facilitates true moving-block or virtual block CBTC or PTC, thereby enabling higher efficiency and track utilization.

A train control system, including: a communication device associated with at least one control unit located on a first train; and a communication device associated with at least one control unit located on a second train; wherein at least one of the control units of the first train and the second train is configured to: (i) receive, at the associated communication device, an authority signal including data sufficient to identify one of the first train and the second train as a lead train and the other of the first train and the second train as a follower train; (ii) establish at least one peer-to-peer communication link between the communication devices of the lead train and the follower train; and (iii) exchange train data between the lead train and the follower train via the at least one peer-to-peer communication link. An on-board control unit is also disclosed.

The invention discloses a train tracing running method implemented without secondary railway testing equipment and a communication based train control (CBTC) system. The method comprises the following steps that in the train running process, a vehicle on board controller (VOBC) of a train checks whether an object controller (OC) waiting to set up communication connection exists or not in the front of a present running line; if the OC waiting to set up communication connection exists, a communication setting request is sent to the OC; the state of a present jurisdiction is checked after the OC receives the communication setting request; if the OC confirms that the present jurisdiction is in a normal communication state, responses to identification (ID) information of all communication trains in the jurisdiction of the OC are sent to the train; the VOBC can recognize the ID information of a front train adjacent to the present train according to the ID information of all the communication trains; the VOBC sets up communications with the adjacent front train according to the ID information of the adjacent front train and obtains running state information of the adjacent front train; and according to the running state information of the adjacent front train and the running state information of the present train, movement authority (MA) in the jurisdiction of the OC is obtained so as to trace running of the front train. Efficiency of railway transportation can be improved greatly by means of the train tracing running method.

The invention provides a CBTC (Communications Based Train Control) signal system simulation testing platform, which comprises a signal bus, a simulation vehicle-mounted and simulation vehicle system, a simulation station, a simulation rail side system, a three-dimensional vision system and a testing platform management system, wherein the simulation vehicle-mounted and simulation vehicle system, the simulation station, the simulation rail side system, the three-dimensional vision system and the testing platform management system are mutually connected through the signal bus. By applying the invention, an integral solution including vehicle, scheduling and signal systems can be checked and demonstrated; a signal system can be subjected to function and performance tests indoors, and failure injection conditions which can not be simulated in various sites can be carried out indoors, thus testing means are enriched and safety of the system is improved; and simulation checking under the condition of multiple vehicles can be passed, a method for analyzing the railway operation capability is deeply researched, and the reference is provided for the layout of signal devices.

The present invention discloses a calculation method of movement authority for communications-based train control system, comprising: handling a route information for a train, and determining a searching range of the train according to the route information; initializing the limit of movement authority with the end position of the searching range; searching for static obstacles within the searching range, and successively determining whether each static obstacle meets the safety requirements for train operating, if not, setting the position of the last static obstacle within the searching range as the limit of the movement authority; if so, modifying the limit of movement authority as the end of route having been matched; searching for dynamic obstacles within the searching range, and determining whether there is a train, if so, modifying the end of movement authority as the beginning point of the track section where the train is occupying; if there is no dynamic obstacle within the searching range, modifying the final end is of movement authority as the position of the last static obstacle within the searching range. In accordance with the present invention, it is possible to increase line capacity and improve traffic fluidity for rail transit.

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 train communication system and method based on AP (Assess Point) switching. The train communication system comprises a central layer, a trackside layer and a vehicle-mounted layer which are in wireless communication in sequence, wherein the central layer comprises a master wireless controller and an auxiliary wireless controller respectively connected with a server through a backbone network, the trackside layer comprises two or more APs linearly distributed beside a track, and the vehicle-mounted layer communicates with the APs through an STA (single thread apartment). As for the rain communication system and method based on AP switching, firstly, the architecture of a CBTC (communication based train control) system is improved firstly, the wireless controller is introduced on the central control layer of a train, the functional configuration of APs is simplified so that other functional configurations of the APs are transferred upwards and the functions are intensively realized in the wireless controllers; and secondly, a communication channel for the APs and the STA is designed, and the STA can work without searching an appropriate communication channel in the detection stage.

The invention discloses a punctual train control system in a CBTC (Communication-based Train Control) fault mode and a control method of the punctual train control system in the CBTC fault mode. The punctual train control system comprises an ATS (Automatic Train Supervision) system, an axle counting system, an interlocking system, a trackside ATO (Automatic Train Operation) part, a trackside ATP (Automatic Train Protection) part, a trackside radio station, a vehicle-mounted radio station and a target controller, and particularly comprises a signal machine, a signal machine beacon, an advance announcing beacon and a vehicle-mounted ATC, wherein the ATS system is used for sensing various control commands; the axle counting system is used for monitoring the train positions; the interlocking system and the trackside ATO part are used for receiving the control commands from the ATS system; the trackside ATP part is used for building train moving authority; the trackside ratio station is used for sending the moving authority information of the trackside ATP part; the vehicle-mounted ration station is used for receiving information of the trackside ratio station; the target controller is used for collecting the trackside equipment state information; and the vehicle-mounted ATC comprises a database. The punctual train control system has the function of punctual ATC automatic driving, and also has the functions of double-red-lamp protection, overspeed protection, train precise station stop and the like at the same time.

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 relates to the technical field of a train operation control system, which discloses a method for monitoring the track state based on a zone control system in a CBTC (communication based train control) system. On one hand, the method takes the zone control system as rail-side equipment, performs differentiation and description through position information of a CBTC train obtained from vehicle-mounted equipment, occupation information of a logic section included in an axle counting section obtained from interlocking equipment, and track situations, updates the track state in real time, realizes accurate monitoring of the track occupation state, can meet the description requirement of mixed operation on a track, and is suitable for the requirement of mixed operation of trains in different levels in a CBTC system. On the other hand, the method increases checking means of train occupation conditions of tracks, processes the guide safety side for abnormal track occupation states, and guarantees the updating accuracy and safety of track states, thereby improving the operation efficiency of the whole CBTC system, and guaranteeing the efficient, safe and reliable operation of the whole CBTC system.

The invention provides a safety protection method of a CBTC system during crossing a control area, which comprises the steps: S1: when the train enters the boundary areas of a first and a second ground ATP systems, the first and the second ground ATP systems mutually transmit the information of access roads R1 and R2 of respective control areas; S2: the first ATP calculates first moving authorization information according to the information of the access roads R1 and R2 and transmits the information to a vehicle-mounted ATP; S3: when the train passes through the boundary point of the boundary area and enters the control area of the second ATP, the vehicle-mounted ATP transmits chain-scission request information to the first ground ATP system and transmits chain-building request information to the second ground ATP system; and S4: the second ground ATP system responses the chain-building request information, calculates second moving authorization information according to the information of the access road R2 and transmits the second moving authorization information to the vehicle-mounted ATP. The invention can ensure that the arrangement of the access road R2 in the boundary point can not be limited; the vehicle-missing phenomenon can not appear when the train breaks down in OB zones; and the cost of the system can be simultaneously reduced.

The invention provides a train safe-positioning method of a ground device of a CBTC system, comprising the following steps of: S1, obtaining driving data of the current train by a vehicular device in real time; S2, respectively calculating a front-end safe envelope and a rear-end safe envelope of the train according to predetermined communication delay time (t), a measured error value, potential retreating quantity and the driving data of the current train; S3, obtaining a train safe position according to the front-end safe envelope and the rear-end safe envelope. The invention has the technical scheme that the ground device is used for actively calculating a train position in order to obtain the train safe position and does not passively use position information transmitted by the vehicular device for defending; and because the communication delay between the train and the ground is considered in real time, the safe position obtained by the ground device is more accurate.

The invention relates to the technical field of embedded systems and provides a method for controlling the data consistency in a communication based train control (CBTC) system. By the method, safety management of data is realized; and all vehicle on board controllers (VOBC), zone controllers (ZC) and other sub systems can acquire new data from a database storage unit (DSU) immediately during running of the whole CBTC system, and the mutually used data are consistent totally. In the method, by adoption of a management strategy based on a database version number, the version number can be associated with a data content, and the probability of error identification can be reduced; meanwhile, the quantity of data interacted among different sub systems is reduced to the maximum extent; therefore, the efficiency and the safety are improved.

The invention provides a control system for CBTC train. In the control system for CBTC trains, a backup system which can minimize the impact on the operation of a train under the condition that a system is not entirely shifted to a backup system is needed, when ground devices can not access the location of the train, such as train failure or a train used for maintenance. The control system can perform a communication-based train control (CBTC) on CBTC trains through simultaneously use of a backup route and a CBTC route, when a non-CBTC train (non-T1-T3) (a train having communication failure or a train used for maintenance) is in operation, so as to minimize the impact on operation of T1-T4 trains. Namely, a backup zone is defined, and non-CBTC trains and CBTC trains continue to operate.

The invention relates to an automatic basic data generating method and system of a CBTC (Communication Based Train Control) system circuit. The method includes the steps that circuit device parameter data are extracted from a CBTC system circuit situation plan; according to the logical relationship among all devices in the circuit situation plan, a circuit station topological graph is generated; and all device parameter data in the circuit station topological graph are acquired and processed, so that a circuit basic data table is generated. The system comprises an original device parameter data acquisition module used for extracting circuit device parameter data from the CBTC system circuit situation plan, a circuit station topological graph generation module used for generating the circuit station topological graph and a circuit basic data table generation module used for automatically generating the circuit basic data table according to all the device parameter data in the circuit station topological graph. By the adoption of the automatic basic data generating method and system, labor cost can be reduced, the circuit basic data processing efficiency is improved, and the accuracy and standardization of the circuit basic data are guaranteed.

The invention provides a route control method under a communication based train control (CBTC) system and a relevant equipment. A route is unlocked after a signal crossing information transmitted by a ZC is received and a starting end signal of the route is normally closed. A situation that a non-CBTC level train does not cross the starting end signal is excluded from the information transmitting opportunity; therefore, under the situation that the non-CBTC level train does not cross the starting end signal, a CI (Computer Interlocking) system cannot execute route unlocking on the route with the advancing of a train in the route so that the safety of the system is improved. And moreover, as the end point of movement authority cannot cross the starting end signal and the CI system unlocks the route under the situation that the starting end signal of the route is normally closed and the signal crossing information is received, the route for executing route unlocking cannot be open for the train outside the starting end signal and the train outside the starting end signal cannot enter routes open for other train by mistake; therefore, the availability of the system is improved.

The invention discloses an LTE-based subway double-network networking method. The networking method comprises steps of: arranging two networks in a subway system, wherein the two networks are networks with independent frequency points; arranging vehicle-mounted wireless devices on the vehicle head and the vehicle tail of train; accessing the vehicle-mounted wireless devices in one of the networks, and connecting the vehicle-mounted wireless devices to a communication-based train control (CBTC) device; and transmitting CBTC signals between the network to which one of the vehicle-mounted wireless device is accessed and the CBTC device through the vehicle-mounted wireless device, and transmitting the CBTC signal and a passenger information system (IPS) signal between the network to which the other one of the vehicle-mounted wireless device is accessed and the CBTC device through the vehicle-mounted wireless device. By use of the technical scheme provided by the invention, reliable transmission of CBTC services can be achieved and the network sharing problem of the CBTC and the TIS is solved.

The invention provides a method for temporary speed limitation in urban rail transit. The method comprises the following steps: after an ATS (Automatic Train Supervision) workstation sets up the temporary speed limitation, a DSU (Data Service Unit) carries out legality check on the temporary speed limitation as well as carries out correctness check on the temporary speed limitation together with the ATS workstation; after the correctness check is passed, the DSU sends out the temporary speed limitation to a ground ATP (Automatic Train Protection) system; the ground ATP system respectively sends the temporary speed limitation to a vehicle-mounted ATP system and a computer interlocking system, so that the vehicle-mounted ATP system executes CBTC (Communications Based Train Control) temporary speed limitation, and the computer interlocking system executes point type temporary speed limitation. The invention also provides a system for the temporary speed limitation in the urban rail transit. The system comprises the ATS workstation, the DSU, the ground ATP system, the vehicle-mounted ATP system and the computer interlocking system. According to the method and the system, the setup, the management, the issuing and the execution of the temporary speed limitation are realized by using typical signal equipment, and the CBTC temporary speed limitation and the point type temporary speed limitation are integrated.

The invention provides a CBTC (Communication Based Train Control) and regional interlocking integrated system and method, relating to the technical field of rail transit. The system comprises a train-train communication integrated device and a train-ground communication integrated device; in case of control with an automatic mode, the train-train communication integrated device acquires first location information, route entering application information and first line data information, processes the first location information and the route entering application information to obtain first route entering state information, and calculates first LMA (Limit Movement Authority) information according to the first line data information and the first route entering state information; in case of control with a backup mode and a manual mode, the train-ground communication integrated device acquires second location information and second line data information, and calculates second LMA information according to the second locationinformation and the second line data information, thus optimizing closed-loop control links, ensuring stability of the integrated system and improving rail transit operating efficiency.

The invention relates to the technical field of construction of foundation facilities of urban track traffic, in particular to a method for automatically arranging trackside equipment, which is suitable for a CBTC (communication-based train control) system. The method for automatically arranging the trackside equipment comprises the following steps of S1, establishing a trackside equipment foundation configuration database containing all trackside equipment; S2, using the trackside equipment as nodes, and designing a trackside equipment topology structure; S3, combining the trackside equipment topology structure to establish a trackside equipment parameter configuration database; and S4, according to the line arrangement data, calling the relevant parameters from the trackside equipment parameter configuration database, and adding the trackside equipment in the trackside equipment foundation configuration database into engineering drawing software, so as to complete the automatic arrangement of the trackside equipment. The method has the advantages that the labor and the cost are greatly reduced, the artificial error is reduced, and the accuracy of the arrangement of the trackside equipment is ensured; and meanwhile, the arrangement efficiency of the trackside equipment is improved, and the favorable technical support is provided for the full-automation design of the CBTC system.

A plurality of wayside communication units may be configured for placement on or near path of trains. Each wayside communication unit may include a power component configured for generating and / or obtaining power for powering components of the wayside communication unit; a communication component configured for transmitting and / or receiving wireless signals; and one or more circuits that process signals and data, and perform one or more applications or functions relating to operations of the wayside communication unit. Each wayside communication unit may be configured to communicate signals and / or messages with one or more local control devices within a legacy train control system, and with each train-based device that moves within communication range of the wayside communication unit. The legacy train control systems may include communication-based train control (CBTC) based systems. The wayside communication units may be configured for utilizing ultra-wideband (UWB) based communications.

The invention provides a simulation testing device and method of a rail transit signal system. The simulation testing device of the rail transit signal system comprises vehicle-mounted equipment, multiple ground equipment and secure communication protocol modules, wherein the vehicle-mounted equipment obtains vehicle-mounted data; the multiple ground equipment obtain ground data; the secure communication protocol modules are connected between the vehicle-mounted equipment and the ground equipment or between the ground equipment and the ground equipment, wherein the secure communication protocol modules receive and transmit the vehicle-mounted data and the ground data by using secure communication protocols. Compared with the prior art, the simulation testing device of the rail transit signal system has the advantages that the communication objects of the vehicle-mounted equipment or the ground equipment are changed into the secure communication protocol modules; the secure communication protocol modules convert the vehicle-mounted data and the ground data into data conforming to a secure communication protocol; the interconnection and intercommunication compatibility of a Communication Based Train Control (CBTC) system is improved; and meanwhile, the secure communication protocol modules can also encrypt the data to enhance the data communication security.

The invention provides a backup point-level temporary speed limitation method and a backup point-level temporary speed limitation system in a CBTC system. The method comprises the following steps: a zone controller ZC receives temporary speed limitation information transmitted by a terminal server ATS; the zone controller ZC sends a temporary speed limitation value corresponding to a temporary speed limitation range to interlocking equipment CI in the temporary speed limitation range; the interlocking equipment CI sends the temporary speed limitation value to a transponder by circuit side electronic equipment LEU so that the transponder sends the temporary speed limitation value to vehicle-mounted signal equipment to control the running speed of a train when the train passes the transponder. According to the method, the temporary speed limitation value can be sent to the interlocking equipment CI according to the temporary speed limitation information transmitted by the terminal server ATS, and subsequently the interlocking equipment CI sends the temporary speed limitation value to the transponder by the circuit side electronic equipment LEU; therefore, the workload of operation is not increased; besides, the temporary speed limitation operation needs no manual intervention; manual driving or automatic driving can be adopted, so the driving safety is guaranteed, and the running efficiency is improved.

The embodiment of the invention discloses an operation method for coping with a tidal passenger flow by adopting a communication based train control (CBTC) system. The operation method comprises the following steps that in a preset time period after the morning peak or the evening peak, trains depart from a first area to a second area according to a first departure interval, and trains depart fromthe second area to the first area according to a second departure interval, wherein the first departure interval is smaller than the second departure interval; and in the process that the trains depart from the second area to the first area, a virtual coupling mode based on train-train communication is adopted to enable the multiple trains to be in virtual coupling operation, so that the actual train flow from the second area to the first area is increased, two-way train flow balance is maintained. The multiple trains are in virtual coupling operation, so that closer-range tracking of the trains is achieved; and meanwhile, the operation mode is more flexible, the passenger carrying characteristics of the tidal passenger flow of urban rail traffic is coped with through the two-way asymmetric rapid and slow train operation measure and the two-way asymmetric passenger flow operation measure, thus the cost is lower, and the train operation efficiency is higher.

The embodiment of the invention provides a fixed block and quasi-moving block compatible communication based train control (CBTC) vehicle-mounted system. The CBTC vehicle-mounted system comprises vehicle-mounted automatic overspeed protection ATP equipment with a CBTC function, ATO equipment with a CBTC function, a transponder receiving unit with a CBTC function, a WLAN / LTE unit, a radar and a speed sensor and further comprises a rail circuit reading unit, wherein the ATO equipment, the transponder unit, the WLAN / LTE unit, the radar, the speed sensor and the rail circuit reading unit are all connected to the vehicle-mounted automatic overspeed protection ATP equipment. According to the fixed block and quasi-moving block compatible CBTC vehicle-mounted system, the defects that in the prior art, the rail transportation fault rate is high, and maintenance pressure is large are overcome. A train can operate under CBTC moving block. Subway transformation comprises the two steps of train transformation and ground equipment transformation, subway faults can be reduced gradually, the transformation cost can be halved in several years, and large-number fund pressure in the short period is reduced.

The invention provides a device and a method for unlocking a route protection section. The method includes: acquiring a confirmation signal of a train driven into a standstill section which is a section before the route protection section; acquiring a standstill signal of the train in the standstill section; obtaining standstill elapsed time of the train according to the confirmation signal and the standstill signal; if the elapsed time does not exceeds preset time, unlocking the route protection section. Therefore, unlocking time of the route protection section is shortened, train operating intervals can be shortened, and operating efficiency of the train is improved. In addition, the method is also applicable to CBTC (communication-based train control) and punctual control systems, and operating efficiency of the train under control of the punctual control system is improved.

The invention discloses a transmission method and system for CBTB vehicle-ground data with distributed fountain codes. The system comprises components such as a ground-distributed fountain code coding and decoding device and a vehicle onboard fountain code coding and decoding device, the ground-distributed fountain code coding and decoding device not only can transmit data to an optical fiber backbone network after coding the data of a CBTC control center, but also can lead data packets from the optical fiber backbone network to be subjected to virtual trunking and decode the data packets, and transmit recovered data after the decoding to the CBTC control center; the vehicle onboard fountain code coding and decoding device can not only lead data packets received from vehicle onboard transceiver antennas to be subjected to virtual trunking and decoding, and transmit the recovered data after the decoding to a VOBC (Vehicle Onboard Controller), but also can send the data transmitted by the VOBC through the vehicle onboard transceiver antennas of the head and the rear of a vehicle after coding the data. The transmission method and system for CBTB vehicle-ground data with the distributed fountain codes can be used for vehicle-ground data transmission and overcomes the defects of CBTC handoff interrupt, low equipment utilization rate and needing at least one line of complete data during a decoding process.