CN112491685A - High-reliability subway signal transmission protection method - Google Patents
High-reliability subway signal transmission protection method Download PDFInfo
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40169—Flexible bus arrangements
- H04L12/40176—Flexible bus arrangements involving redundancy
- H04L12/40189—Flexible bus arrangements involving redundancy by using a plurality of bus systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
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Abstract
The invention relates to a high-reliability subway signal transmission protection method, which comprises an upper computer and trackside equipment, wherein the trackside equipment is connected to a trackside controller of the upper computer through a relay and an interlocking machine, the trackside equipment, the relay and the interlocking machine are all connected to the upper computer through an interface drive and acquisition module corresponding to the trackside controller, a fiber bragg grating sensor is installed on the trackside equipment, a demodulator receives a reflection spectrum reflected by the fiber bragg grating sensor, a demodulation signal is transmitted to an MCU through a data acquisition circuit, the MCU processes and analyzes the signal to calculate the central wavelength of the fiber bragg grating, and uploads data to the upper computer through an Ethernet; the subway signal transmission protection method provided by the invention solves the problem of route generation brought to sections and turnouts by intelligent agents through allocating the trackside controller, the point switch and the annunciator.
Description
Technical Field
The invention belongs to the technical field of rail transit, and particularly relates to a high-reliability subway signal transmission protection method.
Background
The signal system is a general name of automatic control and communication technology which integrates driving safety, improves transportation capacity and reduces train tracking intervals, is an important equipment system which commands driving safety and punctual operation according to a certain blocking mode, mainly plays a role in ensuring driving safety and improving the passing capacity of a line, and plays a very important role in aspects of safe operation of trains and the like. The development of signal systems is also an important component for measuring the modernization development level of national rail transit technical equipment.
The rail transit signal centralized monitoring system is important driving equipment which ensures driving safety, strengthens the management of a signal equipment joint part, monitors the state of the signal equipment, discovers hidden danger of the signal equipment, analyzes the fault reason of the signal equipment, assists fault processing, guides field maintenance, reflects the application quality of the equipment and improves the maintenance level and the maintenance efficiency of an electric service department, and is a comprehensive monitoring platform for maintaining the signal equipment. The intelligent track signal fault monitoring system mainly monitors the running state of equipment, makes records, plays an auxiliary role in an intelligent early warning analysis technology and a track signal fault diagnosis technology, and meanwhile, makes the signal equipment maintenance technology attach more and more importance to the safety reliability and the network intelligence of the system.
The operation of the rail train does not leave the train control center, the train control center hopes to be capable of communicating the train data in real time and in a redundant mode, then the trackside execution unit for controlling outdoor equipment such as a switch machine, a signal machine, a rail circuit, a locomotive signal and the like is moved forwards to the side of the controlled equipment through the system, and distributed control is achieved. The rail-side signal extension and each control module are communicated by adopting a double CAN bus, a power supply screen supplies power to a rail-side execution unit through independent upstream and downstream throat area redundant power supply networks, and the problem of route generation exists between the existing interlocking host and a rail-side equipment communication device.
Disclosure of Invention
The invention aims to solve the problems in the background art, and provides a high-reliability subway signal transmission protection method, which solves the problem of route generation brought by an intelligent agent to a section and a turnout through allocating a trackside controller, a point switch and a signal machine.
The purpose of the invention is realized as follows:
a high-reliability subway signal transmission protection method comprises an upper computer and trackside equipment, wherein the trackside equipment is connected to a trackside controller of the upper computer through a relay and an interlocking machine, the trackside equipment, the relay and the interlocking machine are connected to the upper computer through corresponding interface drive and acquisition modules in the trackside controller, a fiber grating sensor is installed on the trackside equipment, a demodulator receives a reflection spectrum reflected by the fiber grating sensor, a demodulation signal is transmitted to an MCU through a data acquisition circuit, the MCU processes and analyzes the signal to calculate the central wavelength of the fiber grating, and data are uploaded to the upper computer through an Ethernet.
Preferably, the trackside equipment comprises a switch machine and a signal machine, and the trackside controller comprises a main control module, a signal machine control module connected with the main control module, a switch machine control module, a communication module and an I/O acquisition module.
Preferably, the main control module comprises 2 sets of CPU circuits, an acquisition interface circuit, 2 sets of CAN communication circuits, 2 sets of address code circuits, a lamp indicating circuit, a program downloading circuit, a reset circuit and a power supply circuit.
Preferably, the signal lamp control module comprises 3 sets of MCU circuits, 2 sets of relay action driving circuits, 2 sets of relay state acquisition circuits, 2 sets of lighting current detection circuits, 3 sets of CAN communication circuits, 2 sets of address code acquisition circuits, a lamp indicating circuit, a program downloading circuit, a reset circuit and a power supply circuit.
Preferably, the interlocking machine is connected with a switch machine and a signal machine on a line, receives an interlocking instruction sent by an upper computer, and processes interlocking arrangement, route cancellation, electrolysis, single operation, blocking and unblocking operations.
Preferably, the relay is used for realizing lighting of a signal machine, controlling of a point switch machine and acquiring of track occupation states and setting a disconnection fault.
Preferably, the fiber bragg grating sensor comprises a current sensor and a voltage sensor, a sensing head of the current sensor adopts a giant magnetostrictive rod, a clamping groove is formed in the surface of the giant magnetostrictive rod along the central axis, and the fiber bragg grating is packaged in the clamping groove through epoxy resin.
Preferably, the current sensor has a central wavelength shift Δ λASatisfies the following conditions:
ΔλA=λAζ（1-Pe）μH/[α（H-H0）]；
wherein Δ λAIs the offset of the center wavelength of the fiber grating, lambdaAIs the center wavelength of the fiber grating, PeZeta is the thermo-optic coefficient of the optical fiber material, alpha is the thermal expansion coefficient of the optical fiber material, mu is the magnetostriction coefficient, H0The length of the giant magnetostrictive rod is H, and the length of the giant magnetostrictive rod under the action of an external magnetic field is H.
Preferably, the voltage sensor adopts a piezoelectric ceramic rod, a groove is formed in the surface of the piezoelectric ceramic rod along the central axis, and the fiber bragg grating is packaged in the groove through epoxy resin.
Preferably, the voltage sensor has a central wavelength shift amount Δ λBSatisfies the following conditions:
ΔλB=λBζ（1-Pe）kU/d；
wherein Δ λBIs the offset of the center wavelength of the fiber grating, lambdaBIs the center wavelength of the fiber grating, PeZeta is the thermo-optic coefficient of the optical fiber material, k is the piezoelectric strain constant of the piezoelectric ceramic rod, d is the axial strain of the piezoelectric ceramic rod, and U is the input voltage value.
Preferably, the switch machine control module comprises a driving circuit, a detection circuit, a microprocessor circuit, a communication circuit, an address code/type code acquisition circuit, a representation circuit, an indicator light circuit, a program downloading circuit, a reset circuit and a power supply circuit, and the switch machine control module follows the principle of modularization and strong and weak current isolation.
Preferably, the switch machine control module adopts a closed-loop control technology, an electromagnetic compatibility technology, an isolation technology, a control circuit double-break technology and a completely independent 'two-out-of-two' functional structure to perform safety protection.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a high-reliability subway signal transmission protection method, wherein a trackside controller receives control commands of a relay, an interlocking machine and trackside equipment to judge and process interlocking logic, outputs control commands of a turnout driving and sampling module and a signal driving and sampling module after route arrangement conditions are met, completes turnout conversion and annunciator display, realizes the function of route arrangement, and unlocks routes according to different occupation modes.
2. According to the high-reliability subway signal transmission protection method, the switch machine control module realizes the conversion function of the main line turnout of the tramcar signal system.
3. The invention provides a high-reliability subway signal transmission protection method, wherein a signal lamp control module adopts a completely independent two-out-of-two structure to realize safety control, a CAN communication circuit is used for realizing the transmission of signal lamp control commands, lighting states, fault alarms and other information between an interlocking control host and the signal lamp module, a control MCU circuit is responsible for the core logic operation of the whole module, and according to interlocking commands sent by the interlocking control host, related relays symmetrically arranged on outgoing lines and return lines are operated to hook a main control loop to realize the lighting and the extinguishing of signal lamps. The states of the outgoing line and return line related relays are respectively transmitted to MCUA and MCUB through the state acquisition circuits to be acquired in real time. The signal lighting state is checked by the outgoing line and return line current detection units.
4. The invention provides a high-reliability subway signal transmission protection method, which is characterized in that fiber grating voltage and current sensors are respectively installed on trackside equipment to be monitored, a fiber grating demodulator is adopted to receive a reflection spectrum reflected by the fiber grating sensor, a data acquisition circuit is used to transmit a demodulated signal to an MCU (microprogrammed control unit), the MCU processes and analyzes the signal to calculate the central wavelength of the fiber grating, data is uploaded to a monitoring center through an Ethernet, and upper computer software processes, analyzes, diagnoses and stores the uploaded fiber grating central wavelength data. And calculating the voltage and current values through the central wavelength, and finally giving corresponding judgment to determine whether the trackside equipment is normal or not so as to achieve the purpose of monitoring the working state of the trackside equipment of the track circuit by using the fiber bragg grating.
Drawings
Fig. 1 is a schematic structural diagram of a high-reliability subway signal transmission protection method of the present invention.
Fig. 2 is a structural diagram of a main control module of the subway signal transmission protection method with high reliability.
Fig. 3 is a structure diagram of a switch machine control module of the subway signal transmission protection method with high reliability.
Fig. 4 is a diagram of a semaphore control module of a high-reliability subway signal transmission protection method according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by those skilled in the art without any creative work based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
With reference to fig. 1, a high-reliability subway signal transmission protection method includes an upper computer and a trackside device, wherein the trackside device is connected to a trackside controller of the upper computer through a relay and an interlocking machine, the trackside device, the relay and the interlocking machine are all connected to the upper computer through an interface drive and acquisition module corresponding to the trackside controller, a fiber grating sensor is installed on the trackside device, a demodulator receives a reflection spectrum reflected by the fiber grating sensor, a demodulation signal is transmitted to an MCU through a data acquisition circuit, the MCU processes and analyzes the signal to calculate a center wavelength of the fiber grating, and uploads data to the upper computer through an ethernet.
Example 2
With reference to fig. 1-4, a high-reliability subway signal transmission protection method is characterized in that: the trackside equipment is connected to a trackside controller of the upper computer through a relay and an interlocking machine, the trackside equipment, the relay and the interlocking machine are all connected to the upper computer through corresponding interface driving and collecting modules in the trackside controller, the trackside equipment comprises a switch and a signaler, the trackside controller comprises a main control module, a signaler control module, a switcher control module, a communication module and an I/O (input/output) collecting module, the relay is used for achieving lighting of the signaler, control of the switcher and collection of track occupation states and setting of broken line faults, the interlocking machine is connected with the signaler and the signaler on a line, receives interlocking instructions sent by the upper computer, and processes interlocking arrangement, route cancellation, electrolysis, single operation, blocking and deblocking operations.
The trackside controller is used for executing the receiving and sending of a control command, receiving the state information of the current trackside equipment, carrying out interlocking logic operation according to the control command and the state information of the trackside equipment, sending a series of functions such as route information, a control mode and fault information, and the like, and comprises the following modules:
the main control module: the main control module is a core center of a trackside controller and is also an interlocking center of a main line signal system, the main control module comprises 2 sets of CPU circuits, an acquisition interface circuit, 2 sets of CAN communication circuits, 2 sets of address code circuits, a display lamp circuit, a program downloading circuit, a reset circuit and a power supply circuit, wherein the CPU circuits are responsible for the core logic operation of the whole circuit board, and in order to improve the safety, the logic adopts a two-out-of-two mode, two CPUs independently perform logic operation and perform mutual check; the acquisition interface circuit safety function circuit acquires switching value information of the induction loop acquisition module and the mode change-over switch; the CAN communication circuit completes communication between two CPUs in the circuit board and the optical fiber communication board, the loop communication board, the switching value acquisition board, the turnout driving and mining module and the signal driving and mining module respectively, each CPU is independent of the communication circuits of the optical fiber communication board, the loop communication board, the switching value acquisition board, the turnout driving and mining module and the signal driving and mining module respectively, a redundant CAN communication mode is adopted, and the system CAN work normally as long as 1 path of communication is normal.
An axle counting processing module: collecting feedback information of induction coils arranged at the entrance and exit of a turnout section, carrying out logical operation judgment to obtain the occupation/exit condition of the turnout section, the running direction and speed of a train, and feeding the information back to a main control module in real time through a bus; the signal machine control module: opening or closing the annunciator according to the command of the main control module, simultaneously detecting the working state of the filament of the annunciator in real time, and giving an alarm in time and guiding the alarm to a safety side if the filament is broken; a switch machine control module: driving the point switch to rotate according to the command of the main control module, monitoring the position state of the turnout in real time, and giving an alarm in time and guiding to a safety side if the turnout is not locked; an intersection priority module: when the train approaches the intersection, the module communicates with a traffic light control system of the road intersection to realize the intersection-preferred operation strategy; a communication module: the system comprises two functions, namely, the wireless communication function of the trackside controller and the vehicle-mounted communication equipment is realized, the optical fiber communication function of the trackside controller and the indoor control center is realized, the communication contents of the vehicle-mounted equipment and the control center can be mutually forwarded to the other side through the trackside controller, and the operation scheduling management of the control center on the train is realized; a loop line communication module: the module and the wireless communication module jointly form a redundant communication channel of the trackside controller, the redundant communication channel is connected with a train-ground communication loop at the entrance and exit of a turnout section, and the vehicle-mounted equipment transmits information with the trackside controller through an antenna arranged on a train; an I/O acquisition module: the module is connected with a local operation panel, and the operation information of the operation panel is collected in real time according to the current control mode of the trackside controller to arrange or cancel the access.
Example 3
On the basis of the embodiment 1, in combination with fig. 3, the switch machine is used as a key signal device for switching the turnout, the working state of the switch machine is directly related to the safety and the transportation efficiency in the running process of the tramcar, and the switch machine mainly comprises hardware circuits such as a driving circuit, a detection circuit, a microprocessor circuit, a communication circuit, an address code/type code acquisition circuit, a display circuit, an indicator light circuit, a program downloading circuit, a reset circuit, a power supply circuit and the like. The module circuit is strictly designed according to the principles of modularization and strong and weak current isolation.
The switch machine control module adopts a closed-loop control technology, an electromagnetic compatibility technology, an isolation technology, a control circuit double-break technology and a completely independent 'two-out-of-two' functional structure to carry out safety protection
Example 4
On the basis of embodiment 1, with reference to fig. 4, the signal lamp control module includes 3 sets of MCU circuits, 2 sets of relay operation driving circuits, 2 sets of relay state acquisition circuits, 2 sets of lighting current detection circuits, 3 sets of CAN communication circuits, 2 sets of address code acquisition circuits, a lamp indication circuit, a program download circuit, a reset circuit, and a power supply circuit.
The signal lamp control module adopts a completely independent two-out-of-two structure to realize safety control, the CAN communication circuit is used for realizing the transmission of signal lamp control commands, lighting states, fault alarms and other information between the interlocking control host and the signal lamp module, the control MCU circuit is responsible for the core logic operation of the whole module, and according to the interlocking commands sent by the interlocking control host, the action goes to the line and the related relays symmetrically arranged on the return line are hooked on the main control circuit to realize the lighting and the extinguishing of the signal lamp. The states of the outgoing line and return line related relays are respectively transmitted to MCUA and MCUB through the state acquisition circuits to be acquired in real time. The signal lighting state is checked by the outgoing line and return line current detection units.
Example 5
With reference to fig. 1, the trackside equipment is provided with a fiber grating sensor, the fiber grating sensor is connected to an upper computer through a demodulator, the demodulator receives a reflection spectrum reflected by the fiber grating sensor, a demodulation signal is transmitted to the MCU through a data acquisition circuit, the MCU processes and analyzes the signal to calculate the center wavelength of the fiber grating, and uploads data to the upper computer through the ethernet.
The method comprises the steps that fiber grating voltage and current sensors are respectively installed on trackside equipment to be monitored, a fiber grating demodulator is adopted to receive a reflection spectrum reflected by the fiber grating sensor, a demodulated signal is transmitted to an MCU through a data acquisition circuit, the MCU processes, analyzes and calculates the central wavelength of the fiber grating, data are uploaded to a monitoring center through an Ethernet, and upper computer software processes, analyzes, diagnoses and stores the uploaded central wavelength data of the fiber grating. And calculating the voltage and current values through the central wavelength, and finally giving corresponding judgment to determine whether the trackside equipment is normal or not so as to achieve the purpose of monitoring the working state of the trackside equipment of the track circuit by using the fiber bragg grating.
Example 6
On the basis of embodiment 4, the fiber grating sensor comprises a current sensor and a voltage sensor.
The sensing head of the current sensor adopts a giant magnetostrictive rod, a clamping groove is formed in the surface of the giant magnetostrictive rod along the central axis, and the fiber bragg grating is packaged in the clamping groove through epoxy resin.
A central wavelength offset Delta lambda of the current sensorASatisfies the following conditions: delta lambdaA=λAζ（1-Pe）μH/[α（H-H0）](ii) a Wherein Δ λAIs the offset of the center wavelength of the fiber grating, lambdaAIs the center wavelength of the fiber grating, PeZeta is the thermo-optic coefficient of the optical fiber material, alpha is the thermal expansion coefficient of the optical fiber material, mu is the magnetostriction coefficient, H0The length of the giant magnetostrictive rod is H, and the length of the giant magnetostrictive rod under the action of an external magnetic field is H.
The elongation of the giant magnetostrictive material is increased along with the increase of the intensity of an external magnetic field, the giant magnetostrictive rod works in a linear region, and when the giant magnetostrictive rod works in the linear region, the change of the central wavelength of the fiber grating is in a linear relation with the change of the magnetic field.
The voltage sensor adopts a piezoelectric ceramic rod, a groove is arranged on the surface of the piezoelectric ceramic rod along the central axis, the fiber bragg grating is packaged in the groove through epoxy resin, and the central wavelength offset delta lambda of the voltage sensorBSatisfies the following conditions: delta lambdaB=λBζ（1-Pe) kU/d; wherein Δ λBIs the offset of the center wavelength of the fiber grating, lambdaBIs the center wavelength of the fiber grating, PeZeta is the thermo-optic coefficient of the optical fiber material, k is the piezoelectric strain constant of the piezoelectric ceramic rod, d is the axial strain of the piezoelectric ceramic rod, and U is the input voltage value.
When voltage is loaded on the piezoelectric ceramic, the piezoelectric ceramic can generate axial strain, and the change of the central wavelength of the fiber bragg grating and the input voltage form a linear relation.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents and substitutions made within the scope of the present invention should be included.
Claims (7)
1. A high-reliability subway signal transmission protection method comprises an upper computer and trackside equipment, and is characterized in that: the method comprises the following steps:
s1, the trackside equipment is connected to a trackside controller of an upper computer through a relay and an interlocking machine, the trackside equipment, the relay and the interlocking machine are all connected to the upper computer through an interface drive and acquisition module corresponding to the trackside controller, the trackside controller receives control commands of the relay, the interlocking machine and the trackside equipment to carry out judgment processing of interlocking logic, and outputs control commands to a turnout drive and acquisition module and a signal drive and acquisition module after access arrangement conditions are met;
s2, installing a fiber grating sensor on the trackside equipment, receiving a reflection spectrum reflected by the fiber grating sensor by a demodulator, transmitting a demodulation signal to an MCU (microprogrammed control unit) through a data acquisition circuit, processing and analyzing the signal by the MCU to calculate the central wavelength of the fiber grating, uploading data to an upper computer through an Ethernet, calculating the voltage and current values through the central wavelength by the upper computer, and giving corresponding judgment to determine whether the trackside equipment is normal or not.
2. A high-reliability subway signal transmission protection method as claimed in claim 1, characterized in that: the trackside equipment comprises a switch machine and a signal machine, and the trackside controller comprises a main control module, a signal machine control module, a switch machine control module, a communication module and an I/O acquisition module, wherein the signal machine control module, the switch machine control module, the communication module and the I/O acquisition module are connected with the main control module.
3. A high-reliability subway signal transmission protection method as claimed in claim 2, characterized in that: the main control module comprises 2 sets of CPU circuits, an acquisition interface circuit, 2 sets of CAN communication circuits, 2 sets of address code circuits, a display lamp circuit, a program downloading circuit, a reset circuit and a power supply circuit.
4. A high-reliability subway signal transmission protection method as claimed in claim 2, characterized in that: the signal lamp control module comprises 3 sets of MCU circuits, 2 sets of relay action driving circuits, 2 sets of relay state acquisition circuits, 2 sets of lighting current detection circuits, 3 sets of CAN communication circuits, 2 sets of address code acquisition circuits, a display lamp circuit, a program downloading circuit, a reset circuit and a power supply circuit.
5. A high-reliability subway signal transmission protection method as claimed in claim 1, characterized in that: the interlocking machine is connected with a point switch and a signal machine on a line, receives an interlocking instruction sent by an upper computer, and processes interlocking arrangement, route cancellation, electrolysis, single operation, blocking and deblocking operations.
6. A high-reliability subway signal transmission protection method as claimed in claim 1, characterized in that: the relay is used for realizing lighting of the annunciator, control of the point switch and acquisition of the occupied state of the track, and setting a broken line fault.
7. A high-reliability subway signal transmission protection method as claimed in claim 1, characterized in that: the fiber bragg grating sensor comprises a current sensor and a voltage sensor, wherein a sensing head of the current sensor adopts a giant magnetostrictive rod, and a sensing head of the voltage sensor adopts a piezoelectric ceramic rod.
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