CN106945687B - A kind of design method of railway signal system - Google Patents
A kind of design method of railway signal system Download PDFInfo
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- CN106945687B CN106945687B CN201611227313.6A CN201611227313A CN106945687B CN 106945687 B CN106945687 B CN 106945687B CN 201611227313 A CN201611227313 A CN 201611227313A CN 106945687 B CN106945687 B CN 106945687B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/12—Visible signals
- B61L5/18—Light signals; Mechanisms associated therewith, e.g. blinders
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
- H05B47/10—Controlling the light source
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The present invention relates to a kind of design methods of railway signal system, belong to Information-based Railway field.This method uses computer technology and modern communication technology, semaphore is set to constitute network at the scene by the intelligentized design to semaphore, signal lamp driving plate and collecting vehicle information plate are using single-chip microcontroller PIC18F4580 as its core processor, by by photoelectricity coupling and device, the light on and off of the driving circuit control signal lamp of silicon-controlled equal components composition, by current inductor, the work state information of the state-feedback circuit acquisition signal lamp of the components such as voltage comparator composition, the data of the achievable information of vehicles of collecting vehicle information plate acquire, data analysis and data communication, it will test the car flow information that device detects to send by Acquisition Circuit and shaping circuit to single-chip microcontroller, single-chip microcontroller carries out data analysis to the information, judge that vehicle passes through situation.It can accomplish that whole semaphores in yard realize intelligent and networked control, system has structure simple, it is convenient for safeguarding, it is able to carry out fault location alarm, self diagnosis and health degree analysis, to improve safety, maintainability and the reliability of system, shorten failure delay, while greatly reducing signalling engineering construction volume, saves cable investment.
Description
Technical field
The invention belongs to railway arts, a kind of design method of railway signal system are provided, with single-chip microcontroller
PIC18F4580 realizes the intelligent control of semaphore as its core processor.
Background technique
As the development of the development of China Railway cause and modern electronic technology and computer technology is used, railway
Signal develops to intelligent and networking direction, from original relay system interlocking, to current widely applied computer
Interlocking, microcomputer monitoring, TDCS system etc., railway signal is just experiencing unprecedented variation, and as railway signal system
Important infrastructure device-semaphore still carries out lighting using original relay system interlocking control mode.In relay system interlocking control
Lamp circuit in, every frame semaphore is all controlled using individual signal light circuit, the control of each lamp position of semaphore letter
Number line requires to draw on the combined bay by Machine Room.Many cables are needed to configure at the scene, and there are well laid cables to be not easy to
Adjustment, the problems such as scalability is poor, working efficiency is low.Intelligent railway signal machine system is more using computer network and control etc.
Kind technology carries out completely new design to traditional railway semaphore and its lamp circuit, realizes that interlock system is controlled to semaphore
Instruction.Intellectual technology is able to achieve single-point self adaptive control, induction control, fixed cycle control, multi-period control in conjunction with semaphore
It makes, manually control, yellow sudden strain of a muscle control, green wave controls and the multiple functions such as region control.Therefore, the present invention has very big grind
Study carefully value.
Summary of the invention
In view of this, being used the technical problem to be solved in the present invention is to provide a kind of design method of railway signal system
In the intelligent control for solving the problems, such as semaphore；
Intelligent control comprising realizing semaphore using single-chip microcontroller PIC18F4580 master board as its core processor；
It include power panel, collecting vehicle information plate, signal lamp driving plate, backboard and single-chip microcontroller PIC18F4580
The major function of power panel is to carry out rectifying and voltage-stabilizing to alternating current, exports stable 5V or 3.3V voltage；Information of vehicles
The major function of collection plate is to realize the signal acquisition of 24 road vehicles detectors and serial data, and realize the detection of 24 road vehicles
The LED display function of device working condition；The major function of signal lamp driving plate is to realize that No. 16 signal lamps (are divided into tetra- groups of ABCD
Lamp) the LED display function of control and its working condition that turns on/off, and realize the acquisition of the work state information of No. 16 signal lamps
Function；The major function of backboard is that the channel of communication is provided for each feature board, is carried out between each backboard by CAN bus
Communication；The major function of single-chip microcontroller PIC18F4580 master board is the communication realized with control centre, and drives to signal lamp
Plate issues control program, plays the role of coordinating entire railway signal system work, user can carry out setting for control program
It sets: the setting of crossing essential information, period schemes, timing scheme, festivals or holidays scheme information；
Power panel includes the submodules such as regulator rectifier circuit, 232 interface circuits and GPS interface circuit, and concrete function is such as
Under:
1) regulator rectifier circuit is mainly by DC voltage-stabilizing module YAS30-5V-N and linear regulator chip LM-1117-3.3
It constitutes, 220V alternating current can be transformed into the voltage output of 5V by DC voltage-stabilizing module YAS30-5V-N, and 5V voltage is by linear steady
After the processing for pressing chip LM1117-3.3, the voltage output of 3.3V is obtained, so as to provide surely for entire railway signal system
Fixed 5V power supply or 3.3V power supply；
2) 232 interface circuits are mainly used for realizing the communication of power panel and external serial equipment；
3) GPS interface circuit is mainly made of antenna, GPS module, and antenna can be directly connected to monolithic by backplane channel
In machine PIC18F4580 master board, usb circuit is constituted, GPS module used in entire railway signal system is
GPS module-VK1613 has the advantages that high sensitivity, position error are small and support port number more, and entire railway signal
System calibrates local zone time by operation GPS module；
Collecting vehicle information plate circuit communicates electricity by signal acquisition circuit, signal transformation circuit, serial communication circuit, CAN
Road, temperature collection circuit composition, concrete function are as follows:
1) signal acquisition circuit is made of DB25 interface AND gate circuit chip SN74HC05, and exterior vehicle sensor passes through
The form of Transistor-Transistor Logic level provides information of vehicle flowrate to collecting vehicle information plate, these Transistor-Transistor Logic levels are introduced by DB25 interface and are adopted
Collect plate, the Transistor-Transistor Logic level for being introduced into collecting vehicle information plate carries out level overturning behaviour by gate circuit chip SN74HC05 chip
Make, to obtain the preferable signal of waveform, to achieve the purpose that signal shaping, gate circuit chip SN74HC05 opens for collector
Six groups of phase inverters of road output, have high sensitivity, and the response time is short, can steady operation advantage in the presence of a harsh environment, due to outer
There may be noise pulses in sector signal, and these signals are not really to be produced by vehicle by 24 road vehicles detectors
Raw pulse, therefore decoupling circuit is added in the input of gate circuit chip SN74HC05 chip, for being effectively removed noise
Pulse；
2) after the work of the signal acquisition circuit of upper step, signal passes through preliminary shaping and denoising, by signal
The processing of shaping circuit can make signal collected reach ideal waveform, be conducive to identification and the place of core processor
Reason, signal transformation circuit are made of chip SN74HC04, and the inside collector of SN74HC04 chip is not opened a way, and does not need to connect again
Upper pull-up voltage and pull-up resistor, signal can be directly connected to the input terminal of SN74HC04 chip, can be obtained by ratio in output end
Comparatively ideal output signal；
3) serial communication circuit is for the intercommunication with 24 road vehicles detectors, due to 24 road vehicles detectors
External interface is serial communication, for being communicated with the 24 road vehicles detectors that interface is serial port form, to obtain vehicle flowrate
Information；
4) CAN communication circuit is mainly made of CAN transceiver MCP2551, CAN controller and its peripheral circuit, and CAN is received
Hair device MCP2551 is the interface between CAN driver and physical bus, the high-speed CAN device with fault tolerance, work speed
Rate is 1Mb/s, and each node in CAN bus requires one CAN transceiver MCP2551 of setting, with this by CAN controller
Digital signal generated is converted into differential signal, in favor of bus transfer, meanwhile, CAN transceiver MCP2551 has filtering
Function can effectively be filtered the pulse signal in CAN controller or CAN bus, CAN transceiver MCP2551's
Output allows to connect 112 nodes；
5) temperature collection circuit uses follow-on intelligent temperature sensor, can read tested temperature value, and performance is high
In traditional thermistor, it is only necessary to which a bus is connect with core processor, and read or write speed is fast, and a bus is in addition to having
The effect of data transmission can also power, and follow-on intelligent temperature sensor has there are two crystal oscillator related with temperature,
The crystal oscillator related with temperature of medium and low temperature coefficient is lower to the susceptibility of temperature, and low-temperature coefficient is related with temperature
Crystal oscillator is higher to the susceptibility of temperature, and corresponding with two crystal oscillators related with temperature is counter, and counter posts temperature
Storage has an impact, and counter constantly does subtraction operation under the action of the crystal oscillator related with temperature of low-temperature coefficient, directly
To preset value is kept to zero, the value of temperature register adds 1 at this time, at this point, the value in temperature register is in current environment
Value, and it is built-in with a slope accumulator, the effect of slope accumulator is the numerical value of initialization or amendment counter；
Signal lamp driving plate is made of signal lamp drive module, signal lamp state feedback module, yellow control module of dodging,
Concrete function is as follows:
1) signal lamp driving plate contains 16 road signal lamp drive circuits, is divided into tetra- groups of A, B, C, D, every group include again it is red,
Huang, green light driving circuit each one, 16 road signal lamp drive circuits are mainly by NOT gate driving chip SN74HC05, photoelectric coupling
Device, bidirectional triode thyristor chip and can quick fuse protective tube composition, when single-chip microcontroller PIC18F4580 master board sending light
All the way when the control command word of signal lamp, which is first passed around by 16 road signal lamp drive circuits；Through NOT gate driving chip
After SN74HC05 handles the control command word for lighting signal lamp all the way, light the control command word of signal lamp all the way into
Enter the switching circuit being made of photoelectrical coupler, the source work of photoelectrical coupler is triggered, so that photoelectrical coupler be made to be connected；
After the conducting of the secondary end of photoelectrical coupler, the gate circuit that electric current flows through bidirectional triode thyristor chip triggers its work, to make letter
The alternating current of signal lamp and 220V constitute circuit and light signal lamp；
2) circuit of signal lamp state feedback module is by voltage comparator chip LM2902, current transformer component group
At, wherein current transformer component is used to acquire the work state information of signal lamp, and voltage comparator chip LM2902
The internal independent high gain operational amplifier containing there are four works as signal lamp for the feedback signal of acquisition to be compared and enlarged
When in normal operating conditions, pass through in the voltage that the secondary end of current transformer component has 220V, in current transformer member
The source of device will have induced current to pass through, this induced current is alternating current, after the halfwave rectifier of diode DD,
Signal becomes direct current signal, and after the processing of the filter circuit by being made of capacitor and resistance, output becomes ideal
Low-frequency voltage signal, by the low-frequency voltage signal be sent into voltage comparator chip LM2902 carry out voltage comparison, if voltage ratio
Output compared with device chip LM2902 remains unchanged, then illustrates that signal lamp is in the state worked normally, if its output state is sent out
Variation has been given birth to, then has illustrated that signal lamp work is broken down, needs timely to repair；
3) yellow control module of dodging includes that lamp drives main control chip, monostable flipflop SN74HC122D, NE555 circuit group
At when lamp, which drives plate main control chip, to be worked normally, lamp drives plate main control chip can be continual to monostable flipflop
Negative triggering section A1, A2 of SN74HC122D sends pulse signal, locates the output end of monostable flipflop SN74HC122D always
In transient state state, the transient state at end is low level state, and lamp drives pulse frequency transmitted by plate main control chip and is greater than
SN74HC122D is returned to frequency when stable state by transient state, just can make the output of monostable flipflop SN74HC122D always in this way
In low level state；Square-wave output signal caused by NE555 circuit as composed by diode D4, D5 by opening at this time
Powered-down road is discharged, and makes square-wave output signal that can not go the work of driving signal lamp, is broken down when lamp drives plate main control chip
And when can not work normally, the ability for continuing that pulse signal is sent to monostable flipflop SN74HC122D is just lost, at this point,
The output end of monostable flipflop SN74HC122D just maintains lower state, and the stable state at end is high level state, by diode
Switching circuit composed by D4, D5 is also accordingly turned off, the period caused by NE555 circuit be 2S square-wave output signal just into
Enter the light on and off that driving circuit removes control amber lamp, the external form of expression is time of the amber lamp with the period for 3S
Not short flashing, to reach warning function, wherein the high level high in monostable flipflop SN74HC122D trigger with it is low
Level low formula is as follows
High=ln (2) × (R1+R2) × C formula one
Low=ln (2) × R1× C formula two
R in formula one and formula two1、R2For the resistance in NE555 circuit, C is the power parameter in NE555 circuit；
The concrete function of backboard is as follows:
The major function of backboard is for master control borad, the lamp in signal lamp driving plate drive plate, collection plate provides what CAN was communicated
Data channel, meanwhile, solidifying the address of signal lamp driving plate and collecting vehicle information plate circuit on backboard, (address range is
000-111), it can learn that the address of this backboard, the channel of the master control borad in signal lamp driving plate are back by reading address
Channel provided by plate, backboard have communications bridge beam action in railway signal system；
The concrete function of single-chip microcontroller PIC18F4580 master board is as follows: the master of single-chip microcontroller PIC18F4580 master board
Want function be realize with the communication of Master Control Center, realized by Ethernet interface RJ45 or 3G wireless communication module upload or
Person downloads crossing control program information, in addition, single-chip microcontroller PIC18F4580 master board passes through control signal lamp driving plate and vehicle
Information collection plate enables the work of whole system stable coordination, the core control of single-chip microcontroller PIC18F4580 master board
Chip is made of ARM chip S5PV210, is the control core of entire railway signal system, can be run Linux system thereon
System realizes the communication with Master Control Center by reserved RJ45 interface or 3G wireless communication module；And pass through MAX485 chip
And its operating circuit can realize with the communication of three color count-down boards, communicated by CAN bus, can be real by LCD display
The configuration of existing crossing scheme can realize chamber door signal, pedestrian's street crossing signal, manual/auto control signal by expansion interface
Access
Specific embodiment
In order to which technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Embodiment is closed, the present invention will be described in detail.It should be noted that specific embodiment described herein is only to solve
The present invention is released, is not intended to limit the present invention, the product for being able to achieve said function belongs to equivalent replacement and improvement, is all contained in
Within protection scope of the present invention.The specific method is as follows:
Embodiment 1: signal lamp drives generating process
The software of signal lamp driving plate includes three modules: signal lamp drive module, signal lamp operating status acquisition module
And CAN communication module.By CAN communication module, signal lamp driving plate can receive the signal issued from master board
Lights control scheme, and signal lamp drive module based on the received go that corresponding signal lamp is driven to work by control program.Meanwhile
Signal lamp driving plate can be using the running state information of signal lamp operating status acquisition module acquisition signal lamp, by being acquired
Information handled, can determine whether the signal lamp that semaphore is controlled normally is working, if it is not operated at normally
Working condition the information of one " driving malfunction " is sent to master control borad first then by error handling mechanism, then control this
The signal lamp that plate is connected carries out yellow sudden strain of a muscle, to reach warning function, and master control borad is waited further to control；If signal lamp energy
Enough normal work, then can be uploaded to master board or Master Control Center by CAN communication module for the information, so as to utilize
The real time demonstration of information progress crossing traffic.After the starting of railway signal system, signal lamp driving plate carries out self-test first.Letter
Signal lamp drive module sends one group of test data first, then the operating status letter of signal lamp operating status module acquisition signal lamp
Breath.If signal lamp work is abnormal, the hardware Huang for going to signal lamp driving plate dodges module, is at yellow sudden strain of a muscle state first,
Then the information of " driving malfunction " is sent to master control borad by CAN bus, and waits further troubleshooting；If signal lamp
It is working properly, then the information of " driving is normal " is sent to master control borad, and master board is waited to send control program, signal lamp drives
Movable plate then drives corresponding signal lamp to work according to the control program that master board is issued, in the normal work of signal lamp driving plate
During work, signal lamp state acquisition module constantly acquires signal lamp operating status, if its operating status and current controlling party
Case is not inconsistent, then enters troubleshooting process, is tuning firstly to hardware Huang and dodges module, is at yellow sudden strain of a muscle state, and to master board
The information for sending " driving is abnormal " waits further processing.
Embodiment 2: the signal acquisition process of collecting vehicle information plate
Collecting vehicle information plate just acquires a level signal from DB25 interface every 100ms, then just every 500ms
Single treatment is carried out to level signal collected.Then whithin a period of time, a circuit detector be formed by data record and
Waveform corresponding to it.One 0-1 variation just may make up a pulse, i.e., the data of one vehicle plus a 1-0 variation.It is right
In a detector, since the value at 0 moment, XOR operation is successively carried out, 0 change 1, which will appear one 1,1 change 0, also will appear one
A 1, in this way, in a period of time, just will appear several 1.Because of two 1 calculations one pulse, i.e. a vehicle, so, it uses
1 number divided by 2, round numbers (be likely to occur and begin with a 1-0 jump, or at the end of have a 0-1 jump, in this way,
1 number is exactly odd number, indivisible by 2), the vehicle flowrate in this period can be obtained.For convenience, the data at 0 moment are complete
Based on " 0 ", thus it is only possible to have the case where 0-1 jump at the end of occurring, when statistics is ignored, i.e., flow error is -1.
Occur jumping on 0-1 since 0 moment, after 600ms, be jumped under 1-0 occurs in 600ms.Again after 600ms
Occur jumping on 0-1, crosses 1 and occur jumping under 1-0.It crosses 800ms to occur jumping on 0-1, crosses 600ms and lower jump occur.It crosses
400ms is jumped on occurring, and crosses 800ms and lower jump occurs.In this way, sharing 81, that is, 4 pulses, i.e., flow is 4.
After the completion of data on flows statistics, according to the sequence of appearance " 1 ", between the time for calculating 1-3,3-5,5-7,7-9 etc.
Every then each time interval is added up and is removed by interval number, average headway can be obtained.First " 1 " a to third
It is 1.2s between " 1 ", third " 1 " is 1s between the 5th " 1 " to the 7th " 1 " to being 1.8s between the 5th " 1 ".Altogether
1.2+1.8+1=4s.Average headway is 4/3s.
After the completion of data on flows statistics, according to the sequence of appearance " 1 ", with the time interval of 1-2 (pulsewidth) divided by 1-3
(T) time interval, with the time interval of 3-4 divided by the time interval of 3-5, with the time interval of 5-6 divided by between the time of 5-7
Every, and so on, n pulse occupation rate can be obtained, finally n occupation rate is superimposed and arrives this period divided by n
Average occupancy.First pulsewidth is 600ms, and first T is 1.2s, occupation rate 600/1200=0.5；Second pulsewidth be
1000ms, second T are 1.8s, occupation rate 1000/1800=0.55；Third pulsewidth is 600ms, and third T is 1s,
Occupation rate is 600/1000=0.6；4th pulsewidth is 800ms, and the 4th T is 1.1s, occupation rate 800/1100=0.7.
Average occupancy is (0.5+0.55+0.6+0.7)/4=0.58.
Embodiment 3: the yard course of work of semaphore
It is as follows by taking a three station track stations as an example:
The station shared signal rack number be 7 framves, respectively X, 51, Sfl, 53, DI, D3, DS, totally 20 lamp position S3L, point
Be not: XU, XL, XH, XD, XZU, SIL, SIH, SIB, SllL, SllH, SllB, S3H, S3B, DIB, DIA, D3B, D3A, DSB,
DSA。
The above 7 frame semaphore, corresponding lighting combination are XJX combination, 51, Sn and 53FX combination, and DX group respectively
It closes, has to the signal relay in requisition for acquisition:
X(LXJ、ZXJ、YXJ、TXJ、YSXJ)
51、511、53(LXJ、DXJ)
DI、D3、DS(DX)
It is combined, is obtained following possible by function logic:
XL=LXJ&ZXJ&TXJ&1DJ
XIU=LXJ&ZXJ&！TXJ&IDJorLXJ&！ZXJ&ZDJ&IDJ
XZU=LXJ&！ZXJ&！TXJ
XH==！LXJ&IDJ
XB=！LJ&YXJ
5IL-5ILXJ&！SIDXJ
5IH=！5ILXJ&！SIDXJ
SIB=！SILXJ&SIDXJ
SllL=5ILXJ&！SIDXJ
S3L=SILXJ&！SIDXJ
S3H=！SILXJ&！SIDXJ
S3B=！5ILXJ&SIDXJ
DIB=DIDXJ
DIA=DI！DXJ
D3B==D3DXJ
D3A=D3！DXJ
DSB=DSDXJ
DSA=DS！DXJ
Experiment shows that the present invention has structure simple, convenient for safeguarding, is able to carry out self diagnosis and health degree analysis, thus
The operability and scalability of semaphore can be greatly improved, and the construction volume and cable of signalling engineering can be greatly reduced
Engineering construction investment is saved in the consumption of material.
Claims (1)
1. a kind of design method of railway signal system, it is characterized in that:
Intelligent control comprising realizing semaphore using single-chip microcontroller PIC18F4580 master board as its core processor；
It include power panel, collecting vehicle information plate, signal lamp driving plate, backboard and the single-chip microcontroller PIC18F4580 main control
Plate；
The function of the power panel is to carry out rectifying and voltage-stabilizing to alternating current, exports stable 5V or 3.3V voltage；The information of vehicles
The function of collection plate is to realize the signal acquisition of 24 road vehicles detectors and serial data, and realize the 24 road vehicles detector
The LED display function of working condition；The function of the signal lamp driving plate is the control and its work realizing No. 16 signal lamps and turning on/off
Make the LED display function of state, No. 16 signal lamps are divided into tetra- groups of lamps of ABCD, and realize the working condition letter of No. 16 signal lamp
The acquisition function of breath；The function of the backboard is that the channel of communication is provided for each feature board, is passed through between each backboard
CAN bus is communicated；The function of the single-chip microcontroller PIC18F4580 master board is the communication realized with control centre, and to
The signal lamp driving plate issues control program, plays the role of coordinating the work of entire railway signal system, and user can be into
The setting of row control program: the setting of crossing essential information, period schemes, timing scheme, festivals or holidays scheme information；
The power panel includes that regulator rectifier circuit, 232 interface circuits and GPS interface circuit submodule, concrete function are as follows:
1) regulator rectifier circuit is made of DC voltage-stabilizing module YAS30-5V-N and linear regulator chip LM-1117-3.3,
220V alternating current can be transformed into the voltage output of 5V by the DC voltage-stabilizing module YAS30-5V-N, and 5V voltage is by described linear
After the processing of voltage stabilizing chip LM-1117-3.3, the voltage output of 3.3V is obtained, so as to be the entire railway signal system
Stable 5V power supply or 3.3V power supply are provided；
2) 232 interface circuit for realizing the power panel and external serial equipment communication；
3) the GPS interface circuit is made of antenna, GPS module, and antenna can be directly connected to the monolithic by backplane channel
In machine PIC18F4580 master board, usb circuit is constituted, it is described used in the entire railway signal system
GPS module is GPS module-VK1613, has the advantages that high sensitivity, position error are small and support port number more and described whole
A railway signal system calibrates local zone time by operating the GPS module；
The collecting vehicle information plate is by signal acquisition circuit, signal transformation circuit, serial communication circuit, CAN communication circuit, temperature
Acquisition Circuit composition is spent, concrete function is as follows:
1) signal acquisition circuit is made of DB25 interface AND gate circuit chip SN74HC05, and exterior vehicle sensor passes through
The form of Transistor-Transistor Logic level provides information of vehicle flowrate to the collecting vehicle information plate, these Transistor-Transistor Logic levels are introduced by DB25 interface
Collection plate, the Transistor-Transistor Logic level for being introduced into the collecting vehicle information plate carry out electricity by the gate circuit chip SN74HC05 chip
Flat turning operation, so that the preferable signal of waveform is obtained, to achieve the purpose that signal shaping, the gate circuit chip SN74HC05
For six groups of phase inverters of open collector output, there is high sensitivity, the response time is short, can steady operation in the presence of a harsh environment
Advantage, since there may be noise pulses in outer signals, and these signals are not really by vehicle by 24 tunnel
Pulse caused by wagon detector, therefore decoupling circuit is added in the input of the gate circuit chip SN74HC05 chip,
For being effectively removed noise pulse；
2) after the work of the signal acquisition circuit of upper step, signal passes through preliminary shaping and denoising, by described
The processing of signal transformation circuit can make signal collected reach ideal waveform, be conducive to the knowledge of the core processor
It is not made of with processing, the signal transformation circuit chip SN74HC04, the inside collector of the SN74HC04 chip is not opened
Road does not need to connect pull-up voltage and pull-up resistor again, and signal can be directly connected to the input terminal of the SN74HC04 chip, defeated
Outlet can obtain more satisfactory output signal；
3) serial communication circuit is for the intercommunication with the 24 road vehicles detector, since 24 road vehicles are examined
The external interface for surveying device is serial communication, for being communicated with the 24 road vehicles detector that interface is serial port form, with
Obtain the information of vehicle flowrate；
4) the CAN communication circuit is made of CAN transceiver MCP2551, CAN controller and its peripheral circuit, the CAN transmitting-receiving
Device MCP2551 is the interface between CAN driver and physical bus, the high-speed CAN device with fault tolerance, and operating rate is
1Mb/s, each node in CAN bus are required one CAN transceiver MCP2551 of setting, are controlled the CAN with this
Device digital signal generated is converted into differential signal, in favor of bus transfer, meanwhile, the CAN transceiver MCP2551 has
Filter function can effectively be filtered the pulse signal in the CAN controller or the CAN bus, and the CAN is received
The output of hair device MCP2551 allows to connect 112 nodes；
5) temperature collection circuit uses follow-on intelligent temperature sensor, can read tested temperature value, and performance is high
In traditional thermistor, it is only necessary to which a bus is connect with the core processor, and read or write speed is fast, and a bus is removed
Has the function of data transmission, additionally it is possible to power, there are two with temperature related for follow-on intelligent temperature sensor tool
Crystal oscillator, wherein the related crystal oscillator of the described and temperature of low-temperature coefficient is lower to the susceptibility of temperature, and high-temperature coefficient
The crystal oscillator related with temperature is higher to the susceptibility of temperature, and corresponding with crystal oscillator related with temperature described in two is meter
Number devices, the counter has an impact temperature register, and the counter is related with temperature described in the low-temperature coefficient
Subtraction operation is constantly done under the action of crystal oscillator, until preset value is kept to zero, the value of the temperature register adds 1 at this time, this
When, the value in the temperature register is the value in current environment, and is built-in with a slope accumulator, and the slope is cumulative
The effect of device is initialization or the numerical value for correcting the counter；
The signal lamp driving plate is made of signal lamp drive module, signal lamp state feedback module, yellow control module of dodging, and is had
Body function is as follows:
1) the signal lamp driving plate contains 16 road signal lamp drive circuits, is divided into tetra- groups of A, B, C, D, every group include again it is red, yellow,
Green light driving circuit each one, the 16 road signal lamp drive circuit is by NOT gate driving chip SN74HC05, photoelectrical coupler, double
To controlled silicon chip and the protective tube composition of energy quick fuse, when single-chip microcontroller PIC18F4580 master board sending lights one
When the control command word of road signal lamp, which first passes around the 16 road signal lamp drive circuit；Through NOT gate driving chip
After SN74HC05 handles the control command word for lighting signal lamp all the way, the control life for lighting signal lamp all the way
It enables word enter the switching circuit being made of the photoelectrical coupler, the source work of the photoelectrical coupler is triggered, to make institute
State photoelectrical coupler conducting；After the conducting of the secondary end of the photoelectrical coupler, electric current flows through the door of the bidirectional triode thyristor chip
Polar circuit triggers its work, so that the alternating current of signal lamp and 220V be made to constitute circuit and light signal lamp；
2) circuit of the signal lamp state feedback module is by voltage comparator chip LM2902, current transformer component group
At, wherein the current transformer component is used to acquire the work state information of signal lamp, and the voltage comparator chip
The inside of LM2902 independent high gain operational amplifier containing there are four, for the feedback signal of acquisition to be compared and enlarged,
When signal lamp is in normal operating conditions, pass through in the voltage that the secondary end of the current transformer component has 220V,
The source of the current transformer component will have induced current to pass through, this induced current is alternating current, by diode
After the halfwave rectifier of DD, signal becomes direct current signal, and after the processing of the filter circuit by being made of capacitor and resistance, defeated
Become ideal low-frequency voltage signal out, which is sent into the voltage comparator chip LM2902 and is carried out
Voltage compares, if the output of the voltage comparator chip LM2902 remains unchanged, illustrates that signal lamp is in normal work
State illustrates that signal lamp work is broken down, needs timely to repair if its output state is changed；
3) the yellow control module of dodging includes that lamp drives plate main control chip, monostable flipflop SN74HC122D, NE555 circuit group
At when the lamp, which drives plate main control chip, to be worked normally, the lamp drives plate main control chip can be continual to the monostable
Negative triggering section A1, A2 of trigger SN74HC122D sends pulse signal, makes that the monostable flipflop SN74HC122D's is defeated
Outlet is in transient state state always, and transient state is low level state, and it is big that the lamp drives pulse frequency transmitted by plate main control chip
Frequency when the monostable flipflop SN74HC122D returns to stable state by transient state, can just make the monostable flipflop in this way
The output of SN74HC122D is constantly in low level state；Square-wave output signal caused by the NE555 circuit passes through at this time
The switching circuit as composed by diode D4, D5 discharges, and makes the square-wave output signal that can not go the work of driving signal lamp
Make, when the lamp, which drives plate main control chip, to break down and can not work normally, just loses and continue to the monostable flipflop
SN74HC122D sends the ability of pulse signal, at this point, the output end of the monostable flipflop SN74HC122D just maintains
Lower state, stable state are high level state, and the switching circuit as composed by described diode D4, D5 is also accordingly turned off, described
The square-wave output signal that period caused by NE555 circuit is 2S just enters the light on and off that driving circuit removes control amber lamp,
The external form of expression is time of the amber lamp with the period for 3S not stop to flash, to reach warning function, wherein described
High level high and the formula of low level low in monostable flipflop SN74HC122D is as follows
High level high=ln (2) × (R1+R2) × C formula one
Low level low=ln (2) × R1× C formula two
R in the formula one and the formula two1、R2For the resistance in the NE555 circuit, C is in the NE555 circuit
Power parameter；
The concrete function of the backboard is as follows:
The function of the backboard is for master control borad, the lamp in the signal lamp driving plate drive plate, collection plate provides the number of CAN communication
According to channel, meanwhile, solidify the address of the signal lamp driving plate Yu the collecting vehicle information plate, address range on the backboard
For 000-111, the address of the backboard just can be learned by reading the address, the master control in the signal lamp driving plate
The channel of plate is channel provided by the backboard, and the backboard is in railway signal system with the work of communication bridge
With；
The concrete function of the single-chip microcontroller PIC18F4580 master board is as follows:
The function of the single-chip microcontroller PIC18F4580 master board is the communication realized with Master Control Center, passes through Ethernet interface
RJ45 3G wireless communication module, which is realized, to be uploaded or downloads crossing control program information, in addition, the single-chip microcontroller
PIC18F4580 master board enables whole system by controlling the signal lamp driving plate and the collecting vehicle information plate
The work of stable coordination, the kernel control chip of the single-chip microcontroller PIC18F4580 master board is by ARM chip S5PV210 structure
At, be the control core of entire railway signal system, linux system can be run thereon, by reserved RJ45 interface or
Person's 3G wireless communication module realizes the communication with Master Control Center；And it is able to achieve and three by MAX485 chip and its operating circuit
The communication of color count-down board, is communicated by CAN bus, and the configuration of crossing scheme is able to achieve by LCD display, passes through expansion
Exhibition interface is able to achieve the access of chamber door signal, pedestrian's street crossing signal, manual/auto control signal.
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| CN111736563B (en) * | 2020-07-30 | 2021-01-26 | 北京全路通信信号研究设计院集团有限公司 | Control device, distributed control system and control method for annunciator |
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Effective date of registration: 20181227 Address after: 315016 No. 169 Shanshan Road, Wangchun Industrial Park, Haishu District, Ningbo City, Zhejiang Province Applicant after: NINGBO SKYSOFT TECH CO., LTD. Address before: 246121 No. 4, Xin'an Road, Gaohe Town, Huaining County, Anqing City, Anhui Province Applicant before: Huaining Xin orange Information Technology Co., Ltd. |
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