CN113954918A - Outdoor monitoring system of track circuit in station - Google Patents

Abstract

The embodiment of the invention discloses an indoor track circuit outdoor monitoring system which comprises a plurality of outdoor collecting extensions, carrier communication extensions, a communication manager and a diagnosis host which are arranged in each section of an indoor track circuit. The current of each part of the outdoor part of the track circuit in the station is monitored in real time, the running state of the outdoor equipment is mastered, the state analysis of the outdoor equipment can be realized, the occurrence of equipment faults is prevented in time, when the equipment faults occur, the fault points can be quickly positioned, the fault maintenance time is shortened, the configuration is simple, the operation is easy, and the integration level is high.

Description

Outdoor monitoring system of track circuit in station

Technical Field

The embodiment of the invention relates to the technical field of rail transit, in particular to an indoor track circuit outdoor monitoring system.

Background

The 25Hz phase-sensitive track circuit is a main track circuit system in the conventional domestic common speed line station, has the advantages of simple structure, low manufacturing cost, long transmission distance and strong adaptability to complex stations and low track beds, has an insulation damage checking function through polarity cross arrangement, and is widely applied to turnout sections of the common speed line station, a motor train station and a large-scale high-speed railway junction station at present.

However, in practical application, the 25Hz phase-sensitive track circuit also gradually exposes some problems, such as insufficient anti-traction current impact interference capability and often red light flashing phenomenon; the problem of poor shunt in a short section is that the occupation is lost or the shunt residual voltage is too high; the third rail roundabout problem caused by low signal frequency results in that the electric appliance can not reliably fall down after the wire and the rail are broken. At present, 25Hz monitoring means are limited, only the voltage and the GJ state of a receiving end are collected, effective fault location cannot be carried out if a fault occurs, even whether the fault occurs indoors or outdoors cannot be determined, fault location is mostly carried out in a line throwing mode, and the fault processing efficiency is low.

The 25Hz phase-sensitive track circuit only has the function of occupancy check, can only check whether a vehicle occupies or is idle in the section, and cannot transmit any information to the locomotive vehicle-mounted equipment. If the track circuit in the station is not coded, the signal of the locomotive vehicle-mounted equipment when the train operates in the station interrupts the work, and the running safety can not be ensured. The coding section of the in-station track circuit is adopted, and the problem that the integrity of coding information cannot be checked exists in the prior art that an open-loop mode is adopted.

At present, a ZPW-2000 integrated track circuit is commonly adopted in a high-speed rail station, and according to the national iron group standard Q/CR 489-.

Along with the change of the speed increase and the operation mode of the train, the influence of some deficiencies of the track circuit in the station on the transportation safety is gradually highlighted, such as: poor shunting, broken wire inspection, insulation damage inspection, code information integrity inspection, single-end backflow of a side track and the like, and all the problems in the current station cannot be solved by the conventional track circuit with various systems.

Disclosure of Invention

Therefore, the embodiment of the invention provides an indoor track circuit outdoor monitoring system to solve the problem that the existing track circuits in various systems cannot monitor and diagnose each track circuit section of a station in real time and find and locate faults.

In order to achieve the above object, the embodiments of the present invention provide the following technical solutions: an indoor track circuit outdoor monitoring system comprises a plurality of outdoor collecting extensions arranged at each section of an indoor track circuit, a carrier communication extension, a communication manager and a diagnosis host, the outdoor collecting extension is connected with a carrier communication extension, the carrier communication extension is connected with a communication management machine, the communication management machine is connected with the diagnosis host machine, the outdoor collection extension is used for transmitting the current information data collected by the current sensor to the carrier communication extension, the carrier communication extension is used for integrating the acquired current information data and then sending the integrated current information data to the communication management machine, the communication manager is used for processing the acquired data according to a set format and then uploading the processed data to the diagnosis host, the diagnosis host is used for analyzing the running state of each section of the track circuit according to the acquired data, and performing fault analysis, positioning, diagnosis and early warning.

Further, the current information acquired by the current sensor comprises current data of a track transformer cable side and a steel rail lead wire, a choke transformer steel rail lead wire and an absorption wire of a signal transmitting end or a signal receiving end of a track circuit section, the current sensor can acquire current signals of six central frequency bands of 25Hz, 50Hz, 1700Hz, 2000Hz, 2300Hz and 2600Hz at the same time, and the outdoor acquisition extension machine separates and calculates the six frequency band signals acquired by the current sensor through a digital signal processing algorithm.

Further, outdoor collection extension includes sensor module and host system, sensor module includes a plurality of current sensor and ambient temperature sensor, sensor module connects host system's AD acquisition interface, host system gathers AD signal and gives the carrier communication host computer with data transmission through power line carrier communication after carrying out the operation processing.

Further, the carrier communication extension comprises a plurality of isolation power supplies and a plurality of groups of carrier communication modules, an AC220V power supply is connected into the isolation power supplies through a terminal row and respectively provides power for the carrier communication modules, each group of carrier communication modules is connected with the outdoor collection extension through power carrier lines, and the carrier communication modules are connected with the diagnosis host through DB9 interfaces by CAN lines.

Furthermore, the communication manager is used for enabling an AC220V power supply to be filtered by a low-pass filter circuit, then being connected to an AC/DC power supply module to generate 5V voltage to supply power for the CAN 1-9 interface circuits, meanwhile being connected to a DC/DC power supply module to supply power for the FPGA and the MCU, controlling address relay codes of CAN 1-8 channels by the FPGA, and receiving data of the CAN 1-8 channels, reordering the data according to setting and then sending the data to the diagnosis host machine through the CAN9 interface.

Further, the diagnosis host is used for performing fault analysis, positioning, diagnosis and early warning according to a fault diagnosis algorithm, and specifically comprises multi-system in-station track circuit fault diagnosis, total-station power backflow analysis and diagnosis, insulation damage analysis and diagnosis, rail electrical disconnection monitoring analysis and diagnosis, and adjacent line interference analysis and diagnosis.

Further, the multi-system in-station track circuit fault diagnosis specifically includes:

summarizing the acquired appointed format data, triggering diagnosis and judgment logic when abnormal/fault red light bands and abnormal changes of voltage/current analog quantity occur in the sections, performing fault positioning and pre/alarming, judging and positioning according to the established fault area and the fault equipment characteristics, and outputting fault diagnosis information and the fault area;

the agreed format data comprises station yard arrangement, section length, adjacent section names, whether the choke transformers are communicated or not and route information, track voltage, local voltage and phase angle information of the existing receiving end, distribution board voltage of the sending end, state information of all GJ and the like, newly added current acquisition data of the sending end and the receiving end, current information of a steel rail lead wire, a choke center connecting plate, a cable, the track transformers and the choke connecting wire, voltage information of track change and choke change and the like.

Further, the total station power return analysis and diagnosis specifically includes:

the method comprises the steps of increasing current collection for all steel rail lead wires, extracting 50Hz power frequency backflow signals, monitoring total station backflow conditions in real time, obtaining a total station real-time backflow distribution and unbalance degree map through a current collection and unbalance degree calculation formula, providing auxiliary positioning for electric maintenance, and realizing real-time fault positioning and data playback of track circuit curve fluctuation, flashing, red explosion and train interference problems by extracting in-band components of 25Hz, 1700Hz, 2000Hz, 2300Hz and 2600Hz track circuits.

Further, the insulation breakdown analysis and diagnosis specifically includes:

for two adjacent sections of the track circuit, both ZPW-2000 track circuits are, when a mechanical insulation joint is singly damaged, the signal currents of the two sections, the signals of which invade into the section of the opposite side, are I1-I6, I1-I6 are currents of different positions of a variable voltage steel wire rope, I2 and I4 can acquire frequency shift signals of the section of the opposite side besides the current of the section, and the signal amplitude meets the following requirements:

I_1(F1700)≈I_2(F1700)+I_4(F1700)

I_3(F2300)≈I_2(F2300)+I_4(F2300)

wherein, I_1(F1700)The frequency of the passing transformation steel wire rope I1 is 1700Hz signal current, the frequency of the passing transformation steel wire rope I2 is 1700Hz signal current, and the frequency of the passing transformation steel wire rope I4 is 1700Hz signal current;

or the signals of opposite frequencies exist in I5 and I6, the judgment is based on I5 and I6, and since I1-I4 can be used for judgment, the same logic practical double-break section is mainly used;

when two adjacent sections of the ZPW-2000 track circuit and a +25Hz phase-sensitive track circuit of the track circuit are singly damaged, the signal currents of signals of the two sections intruding into the section of the opposite side are I1-I6, I2 and I4 can acquire frequency shift signals of the section of the opposite side besides the current of the section, and the signal amplitude meets the following requirements:

I_1(F1700)≈I_2(F1700)+I_4(F1700)

I_4(F25)≈I_2(F25)+I_3(F25)

wherein, I1(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I1, I2(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I2, I4(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I4, I4(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I4, I2(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I2, and I3(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I3;

or signals of opposite frequencies exist in I5 and I6, and the judgment bases are I5 and I6;

when two sections of ZPW-2000 track circuits adjacent to the track circuit are damaged doubly and the +25Hz phase-sensitive track circuit is damaged doubly, the signal current of signals of the two sections intruding into the section of the opposite side is I1-I6, and the I1-I4 can acquire frequency shift signals of the section of the opposite side besides the current of the section and judge that the two sections are damaged doubly;

when the 25Hz phase-sensitive track circuit and the 25Hz phase-sensitive track circuit are damaged, the phase of a signal receiving end is changed, so that the damage is judged.

Further, the monitoring analysis and diagnosis of the electrical disconnection of the steel rail specifically comprises:

the rail breaking is detected by utilizing the current characteristics of a steel rail lead wire, and the detection is realized by increasing outdoor current acquisition I1-I4, wherein I1-I2 are currents flowing into and out of the choke transformer at one side of a rail breaking position, and I3-I4 are currents flowing into and out of the choke transformer at the other side of the rail breaking position;

by analyzing the current differences of the 4 current monitoring points in the adjusting state, the shunt state and the rail breaking state, the rail breaking detection algorithm is obtained as follows:

I1-I2I <0.1A and I3-I4I <0.1A, which belong to a normal state and have no alarm output;

I1-I2I >0.3A and I3-I4I >0.3A, or I1-I2I/I1 + I2I > 40%, meets the rail breaking characteristic, and performs alarm output.

Further, the adjacent line interference analysis and diagnosis specifically includes:

the method comprises the following steps of judging by utilizing 4 frequency components of 1700Hz, 2000Hz, 2300Hz and 2600Hz in the collected current, and carrying out real-time early warning after adjacent line interference exceeds the standard in the adjustment state, wherein the method specifically comprises the following steps of:

if the section is a 1700Hz signal, but a 2300Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the section is a 2000Hz signal, but a 2600Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the section is 2300Hz signal, but 1700Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the segment is a 2600Hz signal, but a 2000Hz signal is detected to exceed a certain amplitude, the exceeding is judged.

The embodiment of the invention has the following advantages:

the system comprises a plurality of outdoor collecting extensions, a carrier communication extension, a communication management machine and a diagnosis host which are arranged in each section of the in-station track circuit. The current of each part of the outdoor part of the track circuit in the station is monitored in real time, the running state of the outdoor equipment is mastered, the state analysis of the outdoor equipment can be realized, the occurrence of equipment faults is prevented in time, when the equipment faults occur, the fault points can be quickly positioned, the fault maintenance time is shortened, the configuration is simple, the operation is easy, and the integration level is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

Fig. 1 is a schematic structural diagram of an outdoor monitoring system for an in-station track circuit according to embodiment 1 of the present invention;

fig. 2 is a schematic view illustrating installation of a current sensor in a 25Hz track circuit section in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 3 is a schematic view illustrating installation of a ZPW-2000 track circuit section using a current sensor in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 4 is a schematic structural diagram of an outdoor acquisition extension in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 5 is a schematic structural diagram of a carrier communication extension in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 6 is a schematic structural diagram of a power carrier communication module in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 7 is a schematic structural diagram of a communication manager in an outdoor monitoring system for an in-station track circuit according to embodiment 1 of the present invention;

fig. 8 is a schematic diagram illustrating the division of a 25Hz track circuit fault area in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 9 is a schematic diagram illustrating a fault area division of a ZPW-2000 integrated track circuit in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 10 is a schematic diagram of a single broken mechanical insulation joint of two ZPW-2000 track circuits in the indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 11 is a schematic diagram of double breakage of two ZPW-2000 track circuit mechanical insulation joints in the indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 12 is a schematic view of a single broken mechanical insulation section of a ZPW-2000 track circuit +25Hz phase-sensitive track circuit in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 13 is a schematic diagram of a double-breakage of a mechanical insulation section of a ZPW-2000 track circuit +25Hz phase-sensitive track circuit in an indoor track circuit outdoor monitoring system according to embodiment 1 of the present invention;

fig. 14 is a schematic view of track break monitoring of an outdoor monitoring system for an in-station track circuit according to embodiment 1 of the present invention.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1, the present embodiment proposes an indoor track circuit outdoor monitoring system, which includes a plurality of outdoor collection extensions disposed in each section of an indoor track circuit, a carrier communication extension, a communication manager, and a diagnosis host, wherein the outdoor collection extension is connected to the carrier communication extension, the carrier communication extension is connected to the communication manager, and the communication manager is connected to the diagnosis host.

The outdoor acquisition extension is used for transmitting current information data acquired through the current sensor to the carrier communication extension, the carrier communication extension is used for integrating the acquired current information data and then sending the integrated current information data to the communication management machine, the communication management machine is used for processing the acquired data according to a set format and then uploading the processed data to the diagnosis host, and the diagnosis host is used for analyzing the running state of each section of the track circuit according to the acquired data and carrying out fault analysis, positioning, diagnosis and early warning.

The railway of China adopts a track circuit to solve the problem of train occupancy check, namely positions on a vehicle-mounted railway line are divided into sections through the track circuit, the track circuit is special equipment for the railway, and a signal sending end and a signal receiving end are arranged on a steel rail.

The current information collected by the current sensor comprises current data of a track transformer cable side and a steel rail lead wire, a choke transformer steel rail lead wire and a suction line of a transmitting end or a receiving end of a track circuit section, the current sensor can simultaneously collect current signals of six central frequency bands of 25Hz, 50Hz, 1700Hz, 2000Hz, 2300Hz and 2600Hz, and the outdoor collection extension machine separates and calculates the six frequency band signals collected by the current sensor through a digital signal processing algorithm.

Fig. 2 shows a schematic diagram of a 25Hz track circuit section using a current sensor, and fig. 3 shows a schematic diagram of a ZPW-2000 track circuit section using a current sensor.

The outdoor acquisition extension has the functions of acquiring outdoor frequency shift (25 Hz; 50 Hz; 1700 Hz; 2000 Hz; 2300 Hz; 2600Hz) signals, simultaneously acquiring the current of a cable side at a transmitting end (or a receiving end), the current of a steel rail lead wire and the like in real time and monitoring the environmental temperature. The outdoor acquisition unit transmits acquired data and receives remote configuration parameters in a power carrier communication mode.

As shown in fig. 4, the outdoor collection extension includes a sensor module and a main control module, the sensor module includes a plurality of current sensors and an ambient temperature sensor, the sensor module is connected to an AD collection interface of the main control module, and the main control module collects AD signals and performs operation processing and then sends data to the carrier communication host through power carrier communication.

The carrier communication extension receives transmission data of the outdoor acquisition unit and parameters of the remotely configured outdoor acquisition unit through the power carrier line, and periodically transmits the transmission data and the parameters to the communication management machine through the CAN line.

As shown in fig. 5, the carrier communication extension includes 4 isolated power supplies and 4 groups of carrier communication modules, an AC220V power supply is connected to a plurality of isolated power supplies through a terminal strip, and respectively provides power for 4 groups of carrier communication modules, each group of carrier communication modules is connected to a plurality of groups of outdoor collection extensions through power carrier lines, and is connected to 20 groups of outdoor collection devices at maximum, and the 4 groups of carrier communication modules are connected to the diagnosis host through a DB9 interface by using CAN lines.

The principle of the PLC carrier communication extension module is shown in fig. 6, an AC220V power supply is connected into a module, then is filtered by a low-pass filter circuit and then is connected into an AC/DC power supply module, and meanwhile, power supply for an outdoor acquisition unit is led out. The core part of the PLC carrier communication host computer module is a PLC & CPU master control module. The module has the functions of PLC communication, logical operation, CAN communication and analog signal acquisition and processing. The power carrier communication signal passes through a high-pass filter and an isolation transformer and is finally connected with the AC220V in parallel and then output to be connected with the track side frequency shift acquisition unit.

The communication management machine is responsible for sequencing the data of each carrier communication sub-collection according to a set rule and then sending the data to the diagnosis host. Each communication processor CAN be connected with 8 paths of data input CAN at most, and one path of data output CAN.

As shown in fig. 7, the communication manager is used for filtering the AC220V power through the low pass filter circuit, accessing the AC/DC power module to generate 5V voltage to supply power to the CAN 1-9 interface circuit, accessing the DC/DC power module to supply power to the FPGA and the MCU, controlling the address codes of the CAN 1-8 channels by the FPGA, receiving the data of the CAN 1-8 channels, reordering the data according to the setting, and sending the data to the diagnosis host through the CAN9 interface.

The diagnosis host is the core of the diagnosis system, and gives a specific, real-time and accurate fault diagnosis conclusion by combining the multi-year track circuit maintenance experience accumulation and an advanced software algorithm so as to guide the field fault maintenance recovery. The host receives and integrates the existing indoor acquisition information and outdoor current/temperature information, establishes an equipment and transmission system model, and completes the fault diagnosis function of each link such as a 25Hz phase-sensitive track circuit, a coded track circuit, a ZPW-2000 track circuit, power frequency backflow and the like. The fault diagnosis host has the functions of data acquisition, processing, storage, statistics, interface display, history playback, fault diagnosis positioning, issuing configuration and the like, and transmits the acquired data and the alarm data to the signal centralized monitoring station machine through the Ethernet interface.

The diagnosis host is used for carrying out fault analysis, positioning, diagnosis and early warning according to a fault diagnosis algorithm, and specifically comprises multi-system in-station track circuit fault diagnosis, total-station power backflow analysis and diagnosis, insulation damage analysis and diagnosis, rail electrical disconnection monitoring analysis and diagnosis, and adjacent line interference analysis and diagnosis.

The diagnosis algorithm principle is based on theoretical analysis and simulation calculation of a 25Hz phase-sensitive track circuit and a ZPW-2000 integrated track circuit, and rapid and accurate fault location of 25Hz phase-sensitive track circuit and ZPW-2000 integrated track circuit equipment and channels is realized by utilizing indoor and outdoor acquired data and combining field personnel application experience.

(1) The multi-system in-station track circuit fault diagnosis specifically comprises the following steps:

data input: collecting the acquired appointed format data, wherein the appointed format data comprises station yard arrangement, section length, adjacent section names, whether a choke transformer is communicated or not and route information, track voltage, local voltage and phase angle information of the existing receiving end, distribution board voltage of the transmitting end, state information of each GJ and the like, newly added current acquisition data of the transmitting end and the receiving end, current information of a steel rail lead wire, a choke center connecting plate, a cable, a track transformer and a choke connecting wire, voltage information of track change and choke change and the like.

Diagnosis triggering: and when abnormal/fault red light bands and abnormal changes of voltage/current analog quantity occur in the sections, diagnosis and judgment logic is triggered to carry out fault positioning and pre/alarm.

Fault positioning: and then judging and positioning according to the established fault area and the fault equipment characteristics.

And (3) outputting a diagnosis result: and finally, outputting fault diagnosis information and fault areas, wherein the number of the fault areas is not more than 2.

The fault area division of the 25Hz track circuit is shown in figure 8, and the fault area division of the ZPW-2000 integrated track circuit is shown in figure 9.

The 25Hz phase sensitive track circuit can be divided into 12 fault areas, 31 fault types.

The ZPW-2000 track circuit can be divided into 13 fault areas and 31 fault types, and the fault areas are merged or refined according to data dimensions.

(2) The total-station power backflow analysis and diagnosis specifically comprises the following steps:

the method comprises the steps of increasing current collection for all steel rail lead wires, extracting a 50Hz power frequency backflow signal, monitoring the total station backflow situation in real time, and calculating a formula by collecting current and unbalance

The method comprises the steps of obtaining a total-station real-time backflow distribution and unbalance map, providing auxiliary positioning for electric service maintenance, and realizing real-time fault positioning and data playback of track circuit curve fluctuation, flashing, red explosion and train interference problems by extracting in-band components of 25Hz, 1700Hz, 2000Hz, 2300Hz and 2600Hz track circuits.

(3) The insulation breakage analysis and diagnosis specifically comprises the following steps:

the two sides of the steel rail are not normally communicated, and when scrap iron or other conductive objects of the steel rail are connected with the two sides of the steel rail, electrical connection can occur, which is called as 'damage'.

1. ZPW-2000 track circuit + ZPW-2000 track circuit breakage

For two adjacent sections of the track circuit, both of which are ZPW-2000 track circuits, when a mechanical insulation joint is singly damaged, the signal current of the two sections with signals intruding into the section of the opposite side is shown in FIG. 10, I1-I6 are currents at different positions of a transformation steel wire rope, I2 and I4 can acquire frequency shift signals of the section of the opposite side besides acquiring the current of the section, and the signal amplitude meets the following requirements:

I_1(F1700)≈I_2(F1700)+I_4(F1700)

I_3(F2300)≈I_2(F2300)+I_4(F2300)

wherein, I_1(F1700)The frequency of the passing transformation steel wire rope I1 is 1700Hz signal current, the frequency of the passing transformation steel wire rope I2 is 1700Hz signal current, and the frequency of the passing transformation steel wire rope I4 is 1700Hz signal current;

or the signals of opposite frequencies exist in I5 and I6, the judgment is based on I5 and I6, and since I1-I4 can be used for judgment, the same logic is mainly used for a double-break section, as shown in FIG. 11.

2. ZPW-2000 track circuit +25Hz phase sensitive track circuit damage

For two adjacent sections of the track circuit, one is a ZPW-2000 track circuit, the other is a 25Hz phase-sensitive track circuit, when the single break occurs, the signal current of the two sections of signals invading the section of the other side is shown in figure 12, in the figure, I2 and I4 can acquire the frequency shift signal of the section of the other side besides the current of the section, and the signal amplitude satisfies:

I_1(F1700)≈I_2(F1700)+I_4(F1700)

I_4(F25)≈I_2(F25)+I_3(F25)

wherein, I1(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I1, I2(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I2, I4(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I4, I4(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I4, I2(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I2, and I3(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I3;

or signals of opposite frequencies exist in I5 and I6, and the judgment bases are I5 and I6;

when two adjacent sections of the track circuit are a ZPW-2000 track circuit and a 25Hz phase-sensitive track circuit, and are double damaged, the signal current of the two sections with signals invading into the section of the other side is shown in FIG. 13, and I1-I4 can acquire the frequency shift signal of the section of the other side besides the current of the section, and can judge that the sections are double damaged.

3. 25Hz phase sensitive track circuit +25Hz phase sensitive track circuit breakage

For two adjacent sections of the track circuit, one is a 25Hz phase-sensitive track circuit, and the other is also a 25Hz phase-sensitive track circuit, when the track circuit is damaged, the phase of a receiving end is changed, so that the damage is judged.

(4) The rail electrical disconnection monitoring analysis and diagnosis specifically comprises:

the rail breaking is detected by utilizing the current characteristics of the steel rail lead wires, and the detection is realized by increasing outdoor current acquisition I1-I4, wherein I1-I2 are currents flowing into and out of the choke transformer at one side of the rail breaking position, and I3-I4 are currents flowing into and out of the choke transformer at the other side of the rail breaking position, as shown in FIG. 13;

by analyzing the current differences of the 4 current monitoring points in the adjusting state, the shunt state and the rail breaking state, the rail breaking detection algorithm is obtained as follows:

I1-I2I <0.1A and I3-I4I <0.1A, which belong to a normal state and have no alarm output;

I1-I2I >0.3A and I3-I4I >0.3A, or I1-I2I/I1 + I2I > 40%, meets the rail breaking characteristic, and performs alarm output.

(5) The adjacent line interference analysis and diagnosis specifically comprises the following steps:

the method comprises the following steps of judging by utilizing 4 frequency components of 1700Hz, 2000Hz, 2300Hz and 2600Hz in the collected current, and carrying out real-time early warning after adjacent line interference of the adjustment state exceeds the standard, wherein the method specifically comprises the following steps:

if the section is a 1700Hz signal, but a 2300Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the section is a 2000Hz signal, but a 2600Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the section is 2300Hz signal, but 1700Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the segment is a 2600Hz signal, but a 2000Hz signal is detected to exceed a certain amplitude, the exceeding is judged.

The track circuit section is divided into two states of adjustment and occupation, and the adjustment is that no vehicle occupies, occupies: the train occupies the space. The detection can be carried out only when no vehicle occupies, because the train electrically short-circuits the steel rail when occupying, and the receiving end of the track circuit has no signal.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims (10)

1. The system is characterized by comprising a plurality of outdoor collecting extension sets, a carrier communication extension set, a communication management machine and a diagnosis host machine, wherein the outdoor collecting extension sets are arranged in all sections of an in-station track circuit, the outdoor collecting extension sets are connected with the carrier communication extension sets, the carrier communication extension sets are connected with the communication management machine, the communication management machine is connected with the diagnosis host machine, the outdoor collecting extension sets are used for transmitting current information data collected through a current sensor to the carrier communication extension sets, the carrier communication extension sets are used for integrating the obtained current information data and then sending the integrated current information data to the communication management machine, the communication management machine is used for processing the obtained data according to a set format and then uploading the processed data to the diagnosis host machine, and the diagnosis host machine is used for analyzing the running state of all sections of the track circuit according to the obtained data and analyzing faults, Positioning, diagnosing and early warning.

2. The indoor track circuit outdoor monitoring system of claim 1, wherein the current information collected by the current sensor includes current data of a track transformer cable side and a rail lead wire, a choke transformer rail lead wire and a suction wire of a signal transmitting end or a signal receiving end of a track circuit section, the current sensor can simultaneously collect current signals of six central frequency bands of 25Hz, 50Hz, 1700Hz, 2000Hz, 2300Hz and 2600Hz, and the outdoor collection extension separates and calculates the six frequency band signals collected by the current sensor through a digital signal processing algorithm.

3. The indoor track circuit outdoor monitoring system of claim 1, wherein the outdoor collection extension includes a sensor module and a main control module, the sensor module includes a plurality of current sensors and an ambient temperature sensor, the sensor module is connected to an AD collection interface of the main control module, and the main control module collects AD signals, performs operation processing on the AD signals, and then sends data to the carrier communication host through a power carrier communication bus.

4. The in-station track circuit outdoor monitoring system according to claim 1, wherein the carrier communication extension set comprises a plurality of isolated power supplies and a plurality of sets of carrier communication modules, an AC220V power supply is connected to the plurality of isolated power supplies through a terminal strip to respectively provide power for the plurality of sets of carrier communication modules, each set of carrier communication modules is connected with the plurality of sets of outdoor collection extension sets through power carrier wires, and the plurality of sets of carrier communication modules are connected with the diagnosis host through a DB9 interface by using CAN wires; the communication management machine is used for enabling an AC220V power supply to be filtered by a low-pass filter circuit, then being connected into an AC/DC power supply module to generate 5V voltage to supply power for a CAN 1-9 interface circuit, meanwhile being connected into a DC/DC power supply module to supply power for an FPGA and an MCU, controlling address post codes of CAN 1-8 channels by the FPGA, and receiving data of the CAN 1-8 channels by the communication management machine, reordering the data according to setting, and then sending the data to the diagnosis host machine through a CAN9 interface.

5. The system according to claim 1, wherein the diagnosis host is configured to perform fault analysis, location, diagnosis and early warning according to a fault diagnosis algorithm, and specifically includes multi-system in-station track circuit fault diagnosis, total-station power backflow analysis and diagnosis, insulation damage analysis and diagnosis, rail electrical disconnection monitoring analysis and diagnosis, and adjacent line interference analysis and diagnosis.

6. The system as claimed in claim 5, wherein the multi-system in-station track circuit fault diagnosis specifically comprises:

summarizing the acquired appointed format data, triggering diagnosis and judgment logic when abnormal/fault red light bands and abnormal changes of voltage/current analog quantity occur in the sections, performing fault positioning and pre/alarming, judging and positioning according to the established fault area and the fault equipment characteristics, and outputting fault diagnosis information and the fault area;

the agreed format data comprises station yard arrangement, section length, adjacent section names, whether the choke transformers are communicated or not and route information, track voltage, local voltage and phase angle information of the existing receiving end, distribution board voltage of the sending end, state information of all GJ and the like, newly added current acquisition data of the sending end and the receiving end, current information of a steel rail lead wire, a choke center connecting plate, a cable, the track transformers and the choke connecting wire, voltage information of track change and choke change and the like.

7. The system according to claim 5, wherein the total station power return analysis and diagnosis includes:

the method comprises the steps of increasing current collection for all steel rail lead wires, extracting 50Hz power frequency backflow signals, monitoring total station backflow conditions in real time, obtaining a total station real-time backflow distribution and unbalance degree map through a current collection and unbalance degree calculation formula, providing auxiliary positioning for electric maintenance, and realizing real-time fault positioning and data playback of track circuit curve fluctuation, flashing, red explosion and train interference problems by extracting in-band components of 25Hz, 1700Hz, 2000Hz, 2300Hz and 2600Hz track circuits.

8. The outdoor monitoring system for in-station track circuits according to claim 5, wherein the insulation breakdown analysis and diagnosis includes:

for two adjacent sections of the track circuit, both ZPW-2000 track circuits are, when a mechanical insulation joint is singly damaged, the signal currents of the two sections, the signals of which invade into the section of the opposite side, are I1-I6, I1-I6 are currents of different positions of a variable voltage steel wire rope, I2 and I4 can acquire frequency shift signals of the section of the opposite side besides the current of the section, and the signal amplitude meets the following requirements:

I_1(F1700)≈I_2(F1700)+I_4(F1700)

I_3(F2300)≈I_2(F2300)+I_4(F2300)

wherein, I_1(F1700)The frequency of the passing transformation steel wire rope I1 is 1700Hz signal current, the frequency of the passing transformation steel wire rope I2 is 1700Hz signal current, and the frequency of the passing transformation steel wire rope I4 is 1700Hz signal current;

or the signals of opposite frequencies exist in I5 and I6, the judgment is based on I5 and I6, and since I1-I4 can be used for judgment, the same logic practical double-break section is mainly used;

when two adjacent sections of the ZPW-2000 track circuit and a +25Hz phase-sensitive track circuit of the track circuit are singly damaged, the signal currents of signals of the two sections intruding into the section of the opposite side are I1-I6, I2 and I4 can acquire frequency shift signals of the section of the opposite side besides the current of the section, and the signal amplitude meets the following requirements:

I_1(F1700)≈I_2(F1700)+I_4(F1700)

I_4(F25)≈I_2(F25)+I_3(F25)

wherein, I1(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I1, I2(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I2, I4(F1700) is the current of the signal with the frequency of 1700Hz at the position of the passing transformation steel wire rope I4, I4(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I4, I2(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I2, and I3(F25) is the current of the signal with the frequency of 25Hz at the position of the passing transformation steel wire rope I3;

or signals of opposite frequencies exist in I5 and I6, and the judgment bases are I5 and I6;

when two sections of ZPW-2000 track circuits adjacent to the track circuit are damaged doubly and the +25Hz phase-sensitive track circuit is damaged doubly, the signal current of signals of the two sections intruding into the section of the opposite side is I1-I6, and the I1-I4 can acquire frequency shift signals of the section of the opposite side besides the current of the section and judge that the two sections are damaged doubly;

when the 25Hz phase-sensitive track circuit and the +25Hz phase-sensitive track circuit in two adjacent sections of the track circuit are damaged, the phase of a signal receiving end is changed, so that the damage is judged.

9. The system according to claim 5, wherein the rail electrical disconnection monitoring analysis and diagnosis comprises:

the rail breaking is detected by utilizing the current characteristics of a steel rail lead wire, and the detection is realized by increasing outdoor current acquisition I1-I4, wherein I1-I2 are currents flowing into and out of the choke transformer at one side of a rail breaking position, and I3-I4 are currents flowing into and out of the choke transformer at the other side of the rail breaking position;

by analyzing the current differences of the 4 current monitoring points in the adjusting state, the shunt state and the rail breaking state, the rail breaking detection algorithm is obtained as follows:

I1-I2I <0.1A and I3-I4I <0.1A, which belong to a normal state and have no alarm output;

I1-I2I >0.3A and I3-I4I >0.3A, or I1-I2I/I1 + I2I > 40%, meets the rail breaking characteristic, and performs alarm output.

10. The system according to claim 5, wherein the adjacent line interference analysis and diagnosis comprises:

the method comprises the following steps of judging by utilizing 4 frequency components of 1700Hz, 2000Hz, 2300Hz and 2600Hz in the collected current, and carrying out real-time early warning after adjacent line interference exceeds the standard in the adjustment state, wherein the method specifically comprises the following steps of:

if the section is a 1700Hz signal, but a 2300Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the section is a 2000Hz signal, but a 2600Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the section is 2300Hz signal, but 1700Hz signal is detected to exceed a certain amplitude, judging that the section exceeds the standard; if the segment is a 2600Hz signal, but a 2000Hz signal is detected to exceed a certain amplitude, the exceeding is judged.

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