33 results about "Track circuit" patented technology

The application discloses a tracking lock type maximum power point tracking circuit and an implementation method thereof, which comprises a rectifier circuit, a control circuit, a step-down-step-up converter control circuit and a step-down-step-up converter. The rectifier circuit is used for converting input alternating current energy into direct current energy. The control circuit is used for judging the length of current inductance demagnetization time, adjusting the current inductance demagnetization time, realizing indirect detection of inductance current zero-crossing point, and generating a switch timing control signal. The step-down-step-up converter control circuit is used for generating a first switch tube driving signal and a second switch tube driving signal. The step-down-step-up converter is used for adjusting input impedance according to the first switch tube driving signal and the second switch tube driving signal, and realizing maximum power point tracking. The application can realize adaptive locking of the maximum power point under different vibration frequencies and different open circuit voltages, improve the tracking speed of the circuit when the input changes, and can be widely applied to the technical field of integrated circuits.

A system and method for virtual block stick circuits is presented. The present disclosure implements specialized algorithms adapted to determine the true status of a virtual block based on multiple inputs from different perspectives. In one embodiment, the system can use the far house perspective of that virtual track segment and the PTC hazard for the near virtual track segment directly adjacent to the near house uses the near house perspective of that virtual track segment. For the middle virtual track segments, the near house perspectives of the middle virtual track segments are held ‘TRUE’ if they are already ‘TRUE’ when the train first enters the block, using stick circuits for the near house perspective of the middle track circuits. The vital application can then indicate the true state of the virtual track segment as occupied (FALSE), to protect the train from trains that follow.

1. Name of the product in this design: Outdoor simulator for track circuits. 2. Purpose of this design: It is used to simulate outdoor equipment for track circuits, and can be used in conjunction with indoor equipment for track circuit debugging when outdoor transmission conditions are not available. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a wheel type red light connection early warning guide wheel device for a rail flaw detector, which comprises a device main body, the device main body is used for detachable connection with a double-track rail flaw detector, two groups of symmetrical conductive rail running wheels are arranged on the device main body, the two groups of conductive rail running wheels are respectively corresponding to two rails of the double-track rail flaw detector, and the conductive rail running wheels are made of conductive materials. The wheel type red light connection early warning guide wheel device for the rail flaw detector utilizes the original track circuit of a railway, controls the on-off of switches to make the two-side rails short-circuit, triggers a signal system "red light belt", realizes automatic and real-time early warning of an operation position, does not need manual additional protection, and can flexibly control the start and stop of the red light connection function according to operation requirements, and has compact structure, strong adaptability and greatly improved safety and operation efficiency of rail flaw detection operation.

The application provides a track circuit detection device, and relates to the technical field of track circuit detection. The two-element unit comprises a first capacitor and a first transformer, and the first capacitor is connected in series with the primary side of the first transformer; the three-element unit comprises a second capacitor, a third capacitor and a second transformer, the second capacitor is connected in series with the primary side of the second transformer, and the third capacitor is connected in parallel with the primary side of the second transformer. The transformers are arranged in the two-element unit and the three-element unit, so that when the voltage across the primary side inductor is too large, the voltage can be appropriately reduced to facilitate signal transmission; the impedance reflected from the secondary side of the transformer to the primary side is increased due to the increase of the transformation ratio, so that the impedance is connected in parallel with the inductance impedance of the primary side, the stability of the primary side inductance is ensured, and the signal acquisition point is arranged at the two ends of the secondary side of the first transformer or the second transformer, so that the voltage signal can be greatly enhanced. Furthermore, the accuracy of track circuit detection can be improved.

This paper discloses a method, computer storage medium, and terminal for implementing self-testing. In this embodiment, a first acquisition function unit and a second acquisition function unit are instantiated inside a field-programmable logic array (FPGA). After inputting analog signals to the first and second acquisition function units, the input of the i-th acquisition processing channel of the first acquisition function unit is adjusted to a preset waveform occupied by the track. By comparing the output results of the acquisition processing performed by the first and second acquisition function units, the self-testing function of the track circuit signal acquisition module is realized.

This invention belongs to the field of track circuit technology, specifically relating to a split-type track circuit compensation capacitor, its manufacturing method, and the track circuit itself. The compensation capacitor includes a capacitor body and lead wires; the capacitor body and the lead wires are detachably connected; one lead wire is provided on each side of the capacitor body. This invention employs a split-type structural design, enabling individual replacement of either the capacitor body or the lead wires in case of failure, reducing on-site maintenance workload, shortening troubleshooting time, and lowering equipment replacement costs.

This invention belongs to the field of track circuit technology, specifically relating to a track circuit compensation capacitor, its manufacturing method, and a track circuit. The two ends of the compensation capacitor are respectively connected to the two rails of the track, and the compensation capacitor is a series-connected dual-core capacitor. The series-connected dual-core design of the track circuit compensation capacitor in this invention improves the voltage withstand performance of the compensation capacitor and effectively reduces the probability of a short-circuit fault in the overall compensation capacitor, thereby improving the reliability of the track circuit system.

The application discloses a track circuit compensation capacitor intelligent positioning marking robot, two driving motors are oppositely arranged on a walking trolley, shafts are connected with the driving motors respectively, track wheel telescopic connecting rod devices are connected with the two ends of the shafts respectively, a track wheel mounting rack is connected between the ends of the track wheel telescopic connecting rod devices on the two sides of the track wheel mounting rack, track wheels are mounted on the side of the track wheel mounting rack, track wheel driving devices are mounted on the inner side of the track wheel mounting rack, and the track wheel driving devices are connected with the track wheels; a shell is mounted on the front end of the walking trolley, a mechanical arm is mounted on the outer side of the shell, a marking line drawing spray gun and a rust removal spray gun are mounted on the end of the mechanical arm. The track circuit compensation capacitor intelligent positioning marking robot has the advantages that information screens, voice broadcast, Beidou positioning modularization, visual signals and light weight design are arranged, maintenance and function expansion are considered, and the track circuit compensation capacitor maintenance intelligent and green solution is provided.

The invention relates to a track circuit signal decoding method and device based on nonlinear transformation enhancement and a storage medium. The method comprises the steps that S1, track circuit signals are collected; s2, the collected track circuit signals are preprocessed; s3, performing first processing on the pre-processed signal, the signal of the positive half cycle and / or the signal of the negative half cycle to obtain a target signal; s4, performing FFT calculation on the target signal to obtain a spectrogram; s5, calculating a rough value of the center frequency of the carrier frequency signal and a rough value of the low-frequency signal based on the frequency doubling in the spectrogram; s6, determining the rough value of the center frequency of the target frequency multiplication based on the rough value of the center frequency of the carrier frequency signal; and S7, on the basis of the obtained rough value of the center frequency of the target frequency multiplication, identifying and obtaining the frequencies of the two spectrum peaks of the target frequency multiplication in the frequency diagram, and calculating the accurate value of the center frequency of the target frequency multiplication and the accurate value of the low-frequency signal. Compared with the prior art, the method has the advantages that the decoding precision is improved under the condition that the chip calculation amount is basically unchanged, and the like.

FIELD: railways.SUBSTANCE: invention relates to the field of railway automation, telemechanics and communications. A temporary device for interval control of train traffic with movable block sections on a section equipped with a numerical code automatic block system comprises temporary entry signals at the boundaries of the section, sets of automatic blocking equipment with track circuits in mounting cabinets (ABTC-MC) equipment in temporary cabinets, sets of equipment for coordination and connection to the rail line, each of which is located in a track box, a temporary connecting cable between the temporary cabinets and the track boxes. In this case, each set of ABTC-MC equipment, located in a temporary cabinet, includes two control modules, modules for generating complex signals of continuous automatic cab signalling (CACS) or single-row CACS, inter-station communication, relay polling and relay control. Moreover, the set of ABTC-MC equipment, located in the first and last temporary cabinets, additionally includes a module for controlling the signals of the input traffic lights, and the set of ABTC-MC equipment, located in the last temporary cabinet and the cabinets installed between the first and last temporary cabinets, additionally includes modules for monitoring the track circuit.EFFECT: reduction in the loss of capacity of a section on a stretch during the course of track works.1 cl, 2 dwg

This invention discloses a robust demodulation method for railway frequency-shift signals based on multi-source feature fusion, comprising the following steps: acquiring frequency-shift signals from railway track circuits and performing digital sampling; performing sliding window framing processing and ChirpZ transform on the original time-domain sampled signal sequence; calculating the instantaneous phase sequence of the analytical signal and performing dewinding and time differentiation processing; calculating the frequency residual signal based on the instantaneous frequency trajectory sequence and performing consistency threshold elimination processing; downsampling the effective frequency residual signal sequence and performing frequency domain coarse positioning operation; filtering the modulation code standard codebook in conjunction with the low-frequency modulation center frequency interval; performing energy calculation using Goertzel operation with codebook constraints; performing energy fusion processing on the candidate frequency energy feature sequences, and outputting the demodulation result of the railway frequency-shift signal. This invention employs multi-source feature fusion to achieve robust demodulation of railway frequency-shift signals.

The present application belongs to the field of rail transit technology, and particularly relates to a kind of calculation method and model of hollow coil inductance value of track circuit, for solving the problem that the geometric size of hollow coil itself is larger, if enough far place is selected as the boundary of field, the calculation amount of vector magnetic potential A is very large, the calculation time is long, and the calculation accuracy cannot be guaranteed.The present scheme selects a calculation field for the inductance of hollow coil, and gives the determination method of vector magnetic potential A on the outer boundary, reducing the calculation amount of inductance value.Compared with the prior art, the present application avoids the problem of too large outer boundary, the calculation amount of vector magnetic potential A is small, the calculation is fast, and the calculation accuracy is effectively guaranteed, which contributes to the stability of track circuit and the safe operation of train.

The present invention relates to a track circuit signal decoding method and apparatus based on non-linear transformation enhancement, and a storage medium. The method comprises: step S1: acquiring a track circuit signal; step S2: pre-processing the acquired track circuit signal; step S3: performing first processing on a positive half-cycle of the preprocessed signal and / or a negative half-cycle of the preprocessed signal to obtain a target signal; step S4: performing an FFT computation on the target signal to obtain a frequency spectrum; step S5: on the basis of a fundamental frequency in the frequency spectrum, calculating an approximate value of a center frequency of a carrier frequency signal and an approximate value of a low-frequency signal; step S6: on the basis of the approximate value of the center frequency of the carrier frequency signal, determining an approximate value of a center frequency of a target harmonic; and step S7: on the basis of the resulting approximate value of the center frequency of the target harmonic, identifying, in a frequency plot, frequencies of two spectral peaks of the target harmonic, and calculating a precise value of the center frequency of the target harmonic and a precise value of the low-frequency signal. Compared with the prior art, the present invention has advantages such as improving decoding accuracy while allowing chip computational loads to remain essentially unchanged.

The application discloses a railway track circuit fault cause analysis method based on edge calculation, which comprises the following steps: step one, collecting track circuit edge event evidence flow; step two, performing edge side event sequencing, working condition stripping and local counter-evidence record forming; step three, generating a section electrical state vector; step four, updating a track circuit dynamic event graph; step five, inputting an edge deployment type improved TGN track circuit dynamic cause tracing model to obtain a fault cause evidence chain; step six, generating a hierarchical cause candidate chain; step seven, generating a counter-evidence verification cause chain; and step eight, generating a track circuit fault cause analysis result. The application adopts a section event memory counter-evidence mechanism and an edge deployment type improved TGN track circuit dynamic cause tracing model to realize edge side real-time tracking and counter-evidence verification analysis of railway track circuit fault causes.

The application provides a visual railway track circuit branching comprehensive testing device, and belongs to the technical field of railway track testing. The visual railway track circuit branching comprehensive testing device comprises a clamping structure and a pressure structure. The clamping structure comprises a connecting head, a first clamping piece and a second clamping piece, and an opening is formed in the other end of the connecting head. The pressure structure comprises a pressure head, a pressure sensor and a second connecting piece, one end of the pressure head is fixed with a pressure rod, and the pressure sensor is connected with the connecting head through the second connecting piece. The testing instrument comprises a shell and a display module, and the pressure sensor is electrically connected with the mainboard through a wire. The application can conveniently fine-tune and display the pressure value, make the applied pressure value more accurate, directly utilize the testing instrument for visual judgment, and has a relatively small overall volume, is more convenient to use, and is more convenient to carry.

The utility model discloses a kind of monitoring equipment for BGM type asymmetric high-voltage pulse track circuit, including multiple groups of monitoring unit, with the communication host computer connected to multiple groups of monitoring unit and with the monitoring host computer connected to communication host computer;Each group of monitoring unit includes multiple monitoring extension, the number of monitoring extension in each group of monitoring unit and each track section BGM type asymmetric high-voltage pulse track circuit is identical;Monitoring extension detects monitoring to each BGM type asymmetric high-voltage pulse track circuit, and each monitoring extension includes pulse peak voltage sampling unit, head effective value voltage sampling unit, tail effective value voltage sampling unit, switching quantity acquisition unit and CAN communication unit.The utility model simple structure, to high-voltage pulse decoder input, output voltage and binary differential relay and interlocking relay state are monitored on line, overcome the malpractice that existing monitoring system cannot monitor track circuit state.

The application provides a station track circuit system and a tuning area element parameter calculation method, and relates to the technical field of track circuits.The system comprises: at least one tuning area;any one of the tuning areas comprises a first tuning unit, a second tuning unit, a first air coil and a two-end rail segment;the first tuning unit, the second tuning unit and the first air coil are connected in parallel through the rail segment;the first air coil is connected to a traction return line through a second air coil;the rail segments of any two adjacent tuning areas are extended and connected;the two tuning units in any one of the segments are the same, and the tuning unit at the first end of the segment is connected to track circuit sending side equipment, and the tuning unit at the second end of the segment is connected to track circuit receiving side equipment.The application can reduce the circuit failure rate, improve the smoothness of the traction current return flow, and improve the anti-interference ability to the traction current harmonic and the adjacent segment track circuit signal.

The invention discloses a transmission signal verification method and a track circuit system, and relates to the technical field of railway signals. The method comprises the following steps: a transmitter modulates a first carrier signal and a second carrier signal with a modulation signal of a target modulation frequency to form a first signal and a second signal; the transmitter transmits the first signal to the receiver through the track and directly transmits the second signal to the receiver; the receiver modulates the first signal and the second signal to obtain a first low frequency and a first amplitude, and a second low frequency and a second amplitude; and when the receiver determines that the first amplitude is greater than the preset amplitude, the first signal is verified based on the first low frequency and the second low frequency. According to the track circuit system, the verification channel directly from the transmitter to the receiver is added, so that a verification mechanism for the first signal is added, the anti-interference capability of the track circuit system is improved, the stability and reliability of the track circuit system are ensured, and the influence of interference signals on normal work of the track circuit system is avoided.

The utility model discloses a detachable track circuit steel rail drilling auxiliary template, include: steel rail and fixed frame, the outside of steel rail is equipped with two collets, the inside sliding connection of fixed frame has two sliding plates. The utility model discloses, when carrying out the drilling to steel rail, through the two collets card setting in the outside of steel rail, can realize the fit limit between fixed frame and steel rail, can make two sliding plates and steel rail parallel limit simultaneously, then the collet is in the outside of steel rail and slides, makes the positioning hole and slides to the drilling position, then rotates the screw and makes the collet and is limited in the outside of steel rail, in order to the stable drilling, when needing to adjust the drilling interval position, through the rotation two -way threaded rod, can make two threaded bushings along the outside of two -way threaded rod and move towards or away from displacement, finally can realize the interval between two sliding plates and adjust, finally can realize the interval adjustment between two positioning holes, can be adapted to the drilling of different interval and carry out the drilling.

To enable the creation of appropriate equivalent circuit models for track circuits, taking frequency characteristics into consideration. [Solution] The rail resistance component and rail inductance component are formed by an RL ladder circuit 10 consisting of N stages (N≧3) of series-parallel circuits in which resistance elements Rn are connected in series and inductance elements Ln are connected in parallel. A combination of frequencies of signals flowing through the rails, including track circuit signals, is selected from combinations of signals to be simulated according to the simulation application. Based on the combination to be simulated, the number of stages N is determined, and the parameters of resistance Rn and inductance Ln for each of the N stages are set to create an equivalent circuit model of the rails that constitute the track circuit.

The application provides a railway station digitized track circuit system and relates to the technical field of railway systems. The scheme comprises the following steps: a main digital control unit outputs an FSK signal with enhanced anti-electric interference capability to a power supply end of a monitored target section; the FSK signal flows back to the main digital control unit after passing through each power receiving end of the target section; the main digital control unit judges whether each power receiving end is in an idle state based on the returned FSK signal; and when all the power receiving ends are in the idle state, the track relay is controlled to be closed.

The present application relates to a railway signal track circuit polarity crossing configuration method and system. The existing manual configuration method has low efficiency and low accuracy. The method draws a single line station track circuit diagram; the complex closed loop in the single line station track circuit diagram is simplified into multiple minimum closed loops; the complex closed loop is searched to obtain the minimum ring closed chain; the minimum ring closed chain is adjusted for insulation; and the station track circuit diagram with polarity crossing is generated. The present application can simplify the complex station type closed loop through algorithm, and integrate the network loop method of polarity crossing verification into the algorithm, instead of the existing manual configuration method, to automatically configure the track circuit polarity crossing, thereby significantly improving the design efficiency and accuracy.

The application discloses a kind of station track circuit fault detection method and system based on cluster analysis, comprising the following steps: current signal data is collected by outdoor branch exchange arranged in each section of track circuit, and data is transmitted to indoor host for pre-processing, and the characteristic data of current signal is extracted.Cluster analysis algorithm is used to recognize and classify the current signal characteristic data of each section, and normal signal and abnormal signal are identified.For abnormal signal, further identify and locate fault type and position through historical fault database and pattern matching algorithm.Generate fault alarm information, and assist maintenance through host computer monitoring software.The method uses Kalman filter and wavelet packet decomposition technology for signal preprocessing, effectively removes noise and extracts features in each frequency band, improving the accuracy of fault detection.Through cluster analysis, fault type and position can be automatically identified and located, reducing human judgment error, improving operation efficiency and safety.

The application is a portable non-contact track frequency shift signal frequency detection system, characterized by comprising a signal sensing and signal conditioning unit (1), a signal acquisition and data processing unit (2), a data storage unit (3), a data display unit (4), the output end of the signal sensing and signal conditioning unit (1) is electrically connected with the input end of the signal acquisition and data processing unit (2), and the signal sensing and signal conditioning unit (1) sends the collected signal to the signal acquisition and data processing unit (2); the signal acquisition and data processing unit (2) comprises at least two output ends; the application adopts a non-contact sensing technology, a low-cost data acquisition and data processing hardware technology, a reliable data processing algorithm and a small-sized portable design scheme, and only needs to place the detection system on any steel rail on site, so that the carrier frequency and low-frequency signal of the track circuit frequency shift signal can be quickly measured, the on-site measurement efficiency is greatly improved, and the cost is reduced.

Railway detection system for detecting the presence of a railway vehicle on a railway track section comprising at least two rails, the railway track section comprising a first end and a second end opposite to the first end in a longitudinal direction of the railway track section, the railway detection system comprising a track circuit system comprising a signal generator electrically coupled to the first end of the railway track section, the signal generator being configured for generating a first track circuit signal to be injected into the railway track section at the first end, wherein the signal generator is adapted togenerate a first component of the first track circuit signal comprising at least one DC pulse;generate a second component of the first track circuit signal, andadd the first and the second component so as to obtain the first track circuit signal.

A railway track circuit short-circuit device, comprising a wire, the wire is connected with a fixing device at both ends respectively, the bottom of the fixing device is provided with a permanent magnet; the lower end surface of the permanent magnet is fixed with a non-magnetic metal sheet, and the lower end surface of the non-magnetic metal sheet protrudes from the lower end surface of the permanent magnet and is electrically connected with the wire; when the fixing device is adsorbed on the steel rail through the permanent magnet, the lower surface of the non-magnetic metal sheet is directly attached to the surface of the steel rail, and the lower surface of the permanent magnet has a gap with the surface of the steel rail. By fixing the non-magnetic metal sheet on the lower end surface of the permanent magnet, the problem of excessive contact resistance caused by the permanent magnet adsorbing impurities such as iron filings, dust and oil stains is effectively overcome, the resistance value of the whole circuit is ensured to be not greater than 0.06 ohm, the signal system can be accurately switched from green light to red light, and the driving and personal safety in the construction, rescue and emergency rescue scenes are ensured.

The application discloses a train control method and device, a storage medium and an electronic device. The method comprises the following steps: acquiring a track section occupation state, an in-station route state, a signal state and an in-station speed limit condition of a station; determining a train operation low-frequency code according to the track section occupation state, the in-station route state and the signal state; when a track circuit fault occurs in a preceding block section before a train enters a station, and the fault section of the preceding block section meets train operation conditions, determining front train receiving route state information according to the in-station route state, the signal state and the in-station speed limit condition; performing consistency checking on the front train receiving route state information according to the train operation low-frequency code; if the checking is passed, acquiring real-time position information of each train, determining a target train which needs to receive the front train receiving route state information according to the real-time position information, and sending the front train receiving route state information to a vehicle-mounted device of the target train; and if the checking is not passed, not sending the front train receiving route state information to the vehicle-mounted device of any train.

The application discloses an electronic switch circuit and a track circuit. The electronic switch circuit comprises a first interface, a second interface, a switch module, a protection module and a relay control interface; the first interface is connected with a positive power receiving end of a first steel rail; the second interface is connected with a negative power receiving end of a second steel rail; the switch module is connected with the first interface, the second interface and the relay control interface respectively, and the switch module is used for controlling the on-off between the second interface and the relay control interface according to the relative relationship between the voltage value of the first interface and a first preset range; the protection module is connected with the first interface and the switch module respectively, and the protection module is used for controlling the disconnection between the switch module and the relay control interface in the case of short circuit between the first steel rail and the second steel rail, and if the switch module has a short circuit fault. The application can improve the reliability of the electronic switch circuit and the safety of the track.

A railroad track washout detector including a monitor programmed to receive data from a conventional track circuit. The monitor is programmed to determine when there is a simultaneous increase in the transmit current and a decrease in the receive current of the track circuit representative of a rain event. The monitor is further programmed to determine when there is a simultaneous decrease in the transmit current and an increase in the receive current that represents drying out of the ballast and soil or a washout. If the simultaneous decrease in the transmit current and an increase in the receive current occurs too soon after the rain event and occurs too quickly, the monitor determines that a washout has occurred.