900 results about "Track circuit" patented technology

A train control system includes a control module that determines a position of a train using a positioning system and consults a database to determine when the train is approaching a portion of track monitored by a track circuit. When the train is near a track circuit, but while the train is still far enough away from the track circuit such that the train can be stopped before reaching the portion of track monitored by the track circuit, the train transmits an interrogation message to a transceiver associated with the track circuit. When the track circuit receives the interrogation message, a test is initiated. The test results are transmitted back to the train. The train takes corrective action if the track circuit fails to respond or indicates a problem.

The invention discloses a resonant tracking non-contact power supply device and a resonant tracking non-contact power supply method and aims to mainly solve the problems that the transmission efficiency and transmission distance are reduced and induction voltage is sensitive to load change caused by the change of a resonant point in an LC resonant non-contact power supply. An excitation source with adjustable frequency and amplitude is formed through an adjustable switch power source (102) and a half-bridge switch (103) and is applied to a resonant circuit consisting of an emitting coil (112) and a resonant capacitor (113); a current signal in the resonant circuit is acquired by using a current sampler (104); an automatic resonant frequency tracking circuit consists of a comparator (105), a phase discriminator (106) and a controllable oscillator (107); when the resonant point changes, an excitation frequency is automatically adjusted and an automatic excitation voltage adjusting circuit consists of a wave detecting and filtering circuit (109), an error amplifier (110) and the adjustable switch power source (102) to automatically adjust the excitation voltage when a load changes, so a load voltage is basically constant. The resonant tracking non-contact power supply device can overcome the effects caused by resonant frequency change and load change and is applicable for the occasion of close-range and high-efficiency non-contact power transmission.

A method is provided for detecting broken rail, unintentionally misaligned turnouts, and track occupancy ahead of or behind a railway vehicle traveling on a railroad track. Shunts extend between the rails at intervals along the railroad track. Each shunt has electrical signal transmission characteristics differing from those of adjacent shunts. A test unit on the railway vehicle induces a test signal in a first rail to create a track circuit in which the test signal propagates along the first rail, through at least one of the shunts, returns to the railway vehicle along the second rail, and through the wheels and axle of the railway vehicle. The test signal has electrical properties selected to interact with at least one of the shunts. The received test signal on the second rail is analyzed to identify predetermined conditions concerning the status of the railroad track.

The invention relates to a CTCS-3 level train control system vehicular device simulation testing system and testing method. The system provides a user interface for selecting and executing a testing script, a vehicular device is tested by simulating running of a train on a line, and data in the testing process are recorded and used for subsequent analysis. The simulation testing system comprises a scene controller module, a train dynamics simulation module, a ground equipment simulation module, a data recording module, a station graph drawing module and a GUI (graphical user interface) module, wherein the scene controller module is used for reading and distributing the testing script and the testing data and controlling the testing process, the train dynamics simulation module is used for calculating the speed and the distance of the rain running on the line, the ground equipment simulation module is used for transmitting rail circuit information, transponder messages and wireless messages to the tested vehicular device, the data recording module is used for recording various testing result data, the station graph drawing module is used for drawing a station graph and displaying the position of the train on the line, and the GUI module is used for providing input testing initial information for testers, simulating driving of the train and repeating a graphical interface for the running state of the train in the testing process.

A universal Automatic Train Protection ATP vehicle mounted system and mode control method. The invention mainly uses digital signal processing and safe redundant control technology, designs a safe Protection Automatic control system which can receive many varieties of ground vehicles information transmission modus, realize the combination of the train speed steps control and the first-order speed-distance model curve and realize the generalization of vehicle automatic protection system vehicle mounted equipments. And the ground vehicles information transmission modus consists of analog and digital track circuit, responder, GSM-R transmission, 2.4GHz wireless transmission, etc. the safe protect control is the safe braking model control using the combination of speed steps and first-order speed-distance model curve. The system mainly consists of power module, ground vehicles information transmission reception module, central processing module, recording module and man-machine interface MMI module, etc. The beneficial result is getting a solving program for users on the base of reducing construction costs and intercommunicating transport operation.

The invention provides a CTCS (China Train Control System)-2 train operation control system comprising ground facilities and a vehicle-mounted apparatus, wherein the ground facilities include a temporary speed limit server, a train control centre, a railway circuit, a ground electric unit and a transponder group; the temporary speed limit server generates a temporary speed limit command; the train control centre generates carrier frequency and low frequency coded messages and active messages according to rail zone state messages and the temporary speed limiting command; the rail circuit generates a modulation signal according to the coded message, sends the modulation signal, generates and sends a rail zone state message; the ground electric unit sends the active transponder messages to a transponder group; the transponder group sends a fixed transponder message and an active transponder message; and the vehicle-mounted apparatus includes a vehicle-mounted safety computer, a railway circuit message receiving module and a transponder message receiving module. The CTCS-2 train operation control system provided by the invention realizes automatic control of train operation based on train operation permission messages transmitted by the rail circuit and the transponder group.

The invention provides a CTCS (China Train Control System)-3-level train control center system, comprising a TCC(Train Control Center). The TCC is used for carrier frequency and low frequency coded commands to a rail circuit device, and receiving rail section state information and device state information returned by the rail circuit device; the TCC is further used for transmitting coded information to the rail circuit device according to route information provided by a CBI (Channel Bus In), the rail section state information and the device state information, and the rail circuit device transmits movement authority information to the train according to the coded information; and the rail circuit device transmits a temporary speed restriction command to the train through an active transponder according to the temporary speed restriction command t transmitted by a TSRS (Temporary Speed Restriction Server). The rail circuit device is used for transmitting the movement authority information to the train according to the coded information. With the CTCS-3-level train control center system, the safety and the reliability of a high-speed railway train operation control system are both improved, and equipment cost and construction difficulty are both reduced.

The invention provides a ZPW-2000A track circuit system, which comprises a receiver, a communication interface device, a sender, a track circuit maintenance machine, a cable lightning protection analogue network, an attenuation redundancy controller, a cable and outdoor trackside equipment, wherein the sender is used for generating and outputting corresponding signals to a train and the receiver according to received carrier-frequency and low-frequency coding information; the receiver is used for demodulating the received signals according to the received carrier-frequency and low-frequency coding information, obtaining track state information and outputting to the track circuit maintenance machine and a train control system; the track circuit maintenance machine is used for analyzing and judging the received self working state of the sender, the self working state of the receiver, signal amplitude and current output by the sender, the signal amplitude of a receiving terminal and the track state information, and correspondingly processing according to judgement results; and the communication interface device is used for completing communication protocol conversion of the sender, the receiver, the track circuit maintenance machine and the train control system.

A CTCS2-class train control system based on wireless locomotive signals is a pint-to-point system for transmitting the train control information via passive responder, regional rail circuit and wireless channel. It is composed of the locomotive carried equipment consisting of ATP device and wireless signaling device, and the ground equipment consisting of wireless signaling device, responder, rail circuit ZPW2000, interface for computer or electric centralizing linkage 6502, and interface for train scheduling and command system or scheduling centralizing system (TDCS or CTC).

The present disclosure describes methods and systems for connecting passive signaling devices (“PSDs”) to a railroad track and using the PSDs to optimize the amplitude, modulation, coding, and frequency of waveforms that applied to the track (by signaling points) for at least three track circuit functions: detecting trains, detecting broken rails, and communicating between signaling points and PSDs.

The invention relates to a reinforced fiber composite sleeper for supporting railway tracks. The reinforced fiber composite sleeper is one made from reinforced fiber materials, fiber felts or weaving cloth through resin impregnation, formed by the pultrusion of a forming die for designing the shape of the section and solidified in the forming die. The invention overcomes the defects of the known techniques, has ideal strength and elasticity and good insulating property compared with the common concrete sleeper and the anticorrosive wooden sleeper, and ensures the safe running of the trains. In addition, with the good elasticity, the reinforced fiber composite sleeper greatly enhances the whole elasticity of the track structure and reduces the influence on roadbeds from the vibration of the trains and the environmental pollution from the noise of the trains during running; with the good insulating property, the reinforced fiber composite sleeper has no influence on the track circuits so as to ensure the safe running of the trains. The invention has the advantages of simple manufacturing, easy forming and short production period, and is capable of realizing the mechanical and continuous production. Besides, the length of the reinforced fiber composite sleeper can be cut and processed according to the determined length requirements, and the waste sleepers can be treated and recycled easily.

The invention is suitable for the field of motor train unit train test run and provides a test line train control system and a test run method. The system comprises a first end track section, a first service braking section, a split-phase section, a second service braking section and a second end track section, all of which are sequentially connected. A CTCS level switching section is further arranged between the split-phase section and the second service braking section. Test line train control center equipment is arranged in a test run control room beside a test line track. Test line outdoor equipment comprises an active/passive transponder set, an interval parking signboard, a mileage position calibration mark, split-phase section outage marks, a temporary speed restriction mark, service braking marks, emergency braking marks and track circuit outdoor equipment. Motor train unit ATP train-mounted equipment communicates with an RBC through a GSM-R. By the adoption of the embodiment, the purpose that the performance of train control train-mounted equipment can be comprehensively tested simply by one time of back-and-forth operation of a motor train unit on a test line.

In the state that a train moves from a track circuit 3T toward a track circuit 5T, and a train detection signal TD1 is supplied from the boundary between the track circuits 3T and 5T to the track circuits 3T and 5T, and the train detection signal TD1 is received by the train, if the signal intensity is suddenly reduced greatly immediately after the axle of the train passes the boundary between the track circuits 3T and 5T, it can be decided that the train passes the boundary between the track circuits 3T and 5T. Therefore, if absolute position information of the track circuit 5T is preserved beforehand in the train, the movement distance calculated from pulse output of a speed generator is corrected (replaced) in the absolute position information of the track circuit 5T, and hereafter is updated by the pulse output, thus the position of the own train can be easily detected as a movement distance.

The invention discloses a vehicle-ground railway signal comprehensive analyzing and monitoring system, and relates to the field of railway signal monitoring. The system comprises a station subsystem, a center subsystem and a network subsystem. The station subsystem aggregates CTC station host monitoring data, computer interlocking monitoring data, train control center monitoring data and track circuit monitoring data to a station server through central signal monitoring and transmits the data to a center server and a station terminal host through a network transmission subsystem. A special railway transmission network is adopted in the network subsystem. The center subsystem, a dynamic monitoring system (DMS) of train control equipment, a CTC server, a radio block center (RBC) and a temporary speed restriction server (TSRS) maintain a communication interface of the host and store and comprehensively analyze monitoring data of the station subsystem. The vehicle-ground railway signal comprehensive analyzing and monitoring system can achieve comprehensive analysis of ground equipment, vehicle-mounted equipment and vehicle-ground closed loop monitoring information, complete prevention, prediction and diagnosis of equipment failures and give an alarm of abnormal monitoring conditions in time.

A factory layout including a track circuit, one or more wheeled carts for traversing the track circuit and a tire/wheel assembly carried by the wheeled cart. One or more work stations can be positioned at locations along the track circuit. Various wheeled cart embodiments are disclosed and various work station configurations are disclosed.

An actual sense amplifier senses a signal received on a bit line to generate a bit, and a latch latches the bit at a time point specified by a latch enable signal. A tracking circuit generates the latch enable signal in an appropriate time window. The tracking circuit may contain a dummy sense amplifier implemented similar to the actual sense amplifier and a dummy column from which the actual sense amplifier senses a signal received upon accessing the dummy memory array. The latch enable signal may be generated after the dummy sense amplifier generates a bit representing the sensed signal. The time taken by the dummy sense amplifier to generate the bit depends on the load offered by the dummy memory array. Accordingly, the dummy memory array is designed to offer sufficient load to ensure that the latch enable signal is generated in an appropriate time window.

The invention belongs to a railway transportation field and relates to a device for measuring horizontally and vertically dynamic displacement of a high-speed railway track line. The device comprises two baffle boards which are equipped at middle of the measured rail perpendicular to the ground or form an angle of 45 degrees with the ground, two laser displacement sensors, and a portable data processing and displaying device; making use of the baffle board which forms an angle of 45 degrees with the ground, the vertical displacement of the track line is converted into a change amount of a horizontal distance by a proportion of 1:1 equivalently; heads of the two laser displacement sensors are aligned with the two baffle boards to measure the dynamic horizontal displacement and the compound displacement including the horizontal displacement and the vertical displacement when a high-speed train passes; the data measured by the two laser displacement sensors are processed by the portable data processing and displaying device, and then the instantaneous horizontal and vertical displacement during the high-speed train passing the track line can be read directly; The measuring device has the advantages of accurate measured data and high respond speed.

The invention discloses an automatic interlocking table generation method based on a track circuit database. The method includes the steps that a text file is derived from the track circuit database; special data are manually input into the text file; all the data in the text file are derived in; a fixed closed interlocking access is searched; a movable closed interlocking access is searched; and an interlocking table and an access graph are displayed and derived out. By the adoption of the method, the efficiency and accuracy in the interlocking table compiling process can be improved.

The invention discloses a method for improving the safety of a CTCS-3 (Chinese train control system-3) train control system in the technical field of railway safety running control. The method comprises line description information fusion, driving license information fusion and temporary speed limitation data fusion, wherein the line description information fusion is as follows: the comparison of line description information received by a CTCS-2 and a CTCS-3 is performed, if the results are consistent, the allowable speed is calculated directly, otherwise, the allowable speed is calculated by safety data; the driving license information fusion is as follows: when the range of a driving license of the CTCS-3 is larger than 7 rail circuit sections and the CTCS-2 gives out an upper limit of idle rail circuit sections, the allowable speed is calculated according to the driving license; and the temporary speed limitation data fusion is as follows: temporary speed limitation messages received by the CTCS-2 and the CTCS-3 are compared, if the results are consistent, the allowable speed is calculated directly, otherwise, the allowable speed is calculated by favorable data. With the adoption of the method, the accuracy and the credibility of the calculation results can be improved, thereby being conductive to safety running of trains.

The invention provides a moving block train control system (China train control system (CTCS)-3I) and method based on a CTCS-3. The moving block train control system and method are used for solving the problem that a high-speed train cannot realize moving block. According to the moving block train control system, hardware equipment is not additionally arranged on the basis of an existing CTCS-3, through a control algorithm, a driver sends application for registration to an RBC before the train is pulled out, and train registration is completed after train recognition is completed; and after the train starts operation, hardware coordinately completes collection and transmission of train operation data, train integrity detection, calculation of a target distance mode curve and moving authority generation, and moving block is realized. A target point of train tracking is changed from an existing track circuit starting end into the tail of the advancing train, the train tracking interval is shortened, and the passing ability of the train in a section is improved by 50%; and in the train operation control process, train positioning and parallel monitoring of the speed and the tracking interval are added by the CTCS-3I, and the safety of train operation is improved.

Improved radio frequency (RF) envelope tracking apparatus for use in wireless and wired systems. In one exemplary embodiment, a transmitter upconversion stage receives input digital I and Q values, the output of the upconversion stage being fed to both an envelope tracking circuit and a power amplifier (before or after optional filtering). The envelope tracking circuit controls the operation of a power modulator, which adjusts the power amplifier. The envelope tracking circuit is specifically configured to provide improved linearity and power efficiency. The envelope tracking apparatus and methods of the present invention may be applied to heterodyne/super-heterodyne architectures as well as others.

The invention provides a simulation test system and method based on a CTCS (China Train Control System) 2-level train control system. The simulation test system comprises a train control ground simulation subsystem, a train control train-mounted simulation subsystem and a database, wherein the train control ground simulation subsystem comprises an interlocking simulation module, a track circuit simulation module, a train control center and an LEU (Line Side Electronic Unit) simulation module, wherein the interlocking simulation module is used for acquiring admission passage information and interval direction control information; the track circuit simulation module is used for acquiring track circuit occupancy information; the train control center is used for generating carrier-frequency and low-frequency information of a track circuit and data information of a transponder and storing the carrier-frequency and low-frequency information and the data information to the database; the LEU simulation module is used for forwarding the data information of the transponder into the database; the train control train-mounted simulation subsystem comprises a train-mounted simulation module and a train-mounted device, wherein the train-mounted simulation module is used for acquiring the carrier-frequency and low-frequency information of the track circuit, the data information of the transponder and a train running control signal; the train-mounted device is used for displaying and simulating the train running state according to all piece of information; and information exchange of the two subsystems is realized by the database. The train control ground simulation subsystem can also comprise a CTC (Centralized Traffic Control) simulation module and a TSRS (Temporary Speed Restriction Server) which are used for providing a temporary speed restriction command.

The invention relates to a locomotive position monitoring and safety controlling device based on a track circuit and a control method thereof. The device comprises a fixed device and a vehicle-mounted device. The fixed device comprises a communication server, a centralized traffic control main machine, a data radio station base station, a global position system (GPS) time service device and a computer interlock system. The vehicle-mounted device comprises a safety control main machine, a vehicle-mounted data radio station, a vehicle-mounted GPS time service device, a display, an alarm voice box, a braking device and a sensor. Based on the devices and a current industrial site computer interlock system, the locomotive position monitoring and safety controlling device based on the track circuit and the control method thereof achieve real-time calculation for an accurate position where a locomotive runs on a railway through utilizing the occupied and idle time of the track circuit and according to the collected running speed of the locomotive, can predict whether the locomotive runs on the basis of observing regulations according to the position and by referring to the conditions of a signal machine, a track switch and other signal devices, and carries out early warning and braking before violation of the regulations. Accordingly, the purpose of guaranteeing safe driving is achieved.

A maximum power point tracking method, applied to a tracking device, employs a DC/DC converter connecting with a solar cell array, and including a controller actuating the DC/DC converter to perform an active resistance characteristic; a maximum power point tracking circuit adjusting the active resistance of the DC/DC converter; monitoring a change of an output power of the solar cell array in determining a direction for adjusting the active resistance of the DC/DC converter; and the maximum power point tracking circuit repeatedly adjusting the active resistance of the DC/DC converter. If the change of the output power of the solar cell array is positive, the active resistance of the DC/DC converter is adjusted in the same direction; but, conversely, if the change of the output power of the solar cell array is negative, the active resistance of the DC/DC converter is adjusted in an opposite direction.