CN106160859A - A kind of CBTC system based on visible light communication - Google Patents
A kind of CBTC system based on visible light communication Download PDFInfo
- Publication number
- CN106160859A CN106160859A CN201610508117.XA CN201610508117A CN106160859A CN 106160859 A CN106160859 A CN 106160859A CN 201610508117 A CN201610508117 A CN 201610508117A CN 106160859 A CN106160859 A CN 106160859A
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- signal
- visible light
- light communication
- communication module
- circuit module
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/116—Visible light communication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/114—Indoor or close-range type systems
- H04B10/1143—Bidirectional transmission
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a kind of CBTC system based on visible light communication, relate to subway train control technical field.Including arrange equipment onboard and be arranged on the equipment on ground, the equipment onboard that arranges is provided with vehicle-mounted visible light communication module, the each equipment being arranged on ground includes arranging trackside visible light communication module along Crane Rail interval, and vehicle-mounted visible light communication module is identical with each trackside visible light communication modular structure: include the communication module for reception and transmission source signal, signal projector and signal receiver；Signal projector includes: modulation circuit module, drive circuit module, LED light source；Signal receiver includes: optical filter, photodetector, pre-amplification circuit module, decoding circuit module, and during train driving, vehicle-mounted visible light communication module is set up uninterrupted communication with trackside visible light communication module and is connected.It has, and communication security reliability is high, equipment investment is few, be easy to Project Realization, the features such as the engineering time is short.
Description
Technical field
The present invention relates to subway train control technical field.
Background technology
In recent years, accelerating and economic quick growth with Urbanization in China, to urban track traffic industry
The security of efficiency and whistle control system thereof is had higher requirement.In subway signal control system, efficiently, safely
Information transmission is to ensure that the properly functioning key foundation of train.Information transmission mode by original track circuit mode to penetrating
Frequency communication and communication development.Based on radio CBTC technology (CBTC) with its significant advantage, gradually become
For the preferred option of city rail traffic signal system, and promoted and used.The current commonly used WiFi of radio communication,
The modes such as leakage cable, WiFi radio communication exists due to weak easy the properly functioning of equipment that affect of anti-interference, leakage cable radio communication
The weak points such as equipment cost is expensive.
Train Detection and Identification CBTC system based on radio communication, it is achieved that full duplex great Rong between train and ground installation
Measure the transmission of two-way continuous information, be intermediary by ground installation, after train can obtain the accurate location of front train, also can
Follow-up train after the position of self is transmitted by ground installation.Train, according to the position of position own and front train, passes through
Train can be implemented the control of the more accurate speed of service by car-mounted computer, significantly improves driving efficiency.
But radio communication there is also some problems and restriction in actual applications: 1) use public mobile communication service phase
Same common frequency channel so that train-ground communication happens occasionally with the accident interfering of public mobile communication service, threatens
The normal work of CBTC system；2) AP transmission transmission of wireless signals is limited by tunnel structure, is affected relatively big by bend and ramp,
In addition the reflection in tunnel seriously causes multi-path jamming, and therefore the laying distance of AP must not be too far away；Simultaneously in order to ensure in AP event
The communication continued reliability of barrier, further requirement shortens the purpose that AP arrangement pitch reaches the seamless switching of high-speed cruising；3)
AP communication uses open channel, exist information be stolen, forward, forge, interference etc. may, have influence on the operation safety of train.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of CBTC system based on visible light communication, and it has communication peace
Full reliability is high, equipment investment is few, be easy to Project Realization, the features such as the engineering time is short.
For solving above-mentioned technical problem, the technical solution used in the present invention is:
A kind of CBTC system based on visible light communication, including arrange equipment onboard: onboard system, also includes by communication
What line linked together the be arranged on equipment on ground: area control system, interlock system, train automatic monitoring system, line side
Electronic equipment and LED signal machine, the equipment onboard that arranges also includes vehicle-mounted visible light communication module, vehicle-mounted visible light communication mould
Block communicates to connect with onboard system, and each equipment being arranged on ground also includes arranging trackside visible light communication along Crane Rail interval
Module, trackside visible light communication module communicates to connect with each equipment being arranged on ground, vehicle-mounted visible light communication module and each rail
Other visible light communication modular structure is identical: include the communication module for reception and transmission source signal, signal projector and signal
Receiver；
Signal projector includes:
Modulation circuit module, signal input part is connected with communication module, for carrying out carrier modulation to signal source, to be converted into height
Frequently the signal of telecommunication；
Drive circuit module, signal input part is connected with modulation circuit module signal output part, for modulation circuit module institute
The high frequency electrical signal of output carries out power amplification, to meet the power requirement to input signal for the LED light source；
LED light source, signal input part is connected with drive circuit module signal output part, for having drive circuit module output
The high frequency electrical signal of certain power is converted into high frequency light signal of communication；
Signal receiver includes:
Optical filter, for receiving the high frequency light signal of communication that LED light source is sent, it is good to LED light source penetrability, to other light
There is certain barrier effect in source, to filter high frequency light signal of communication；
Photodetector, signal input part receives the high frequency light signal of communication that optical filter is passed through, for believing high frequency light communication
It number is converted into high frequency electrical signal；
Pre-amplification circuit module, signal input part is connected with photo detector signal output, is used for defeated to photodetector
The faint high frequency electrical signal going out carries out forward voltage amplification；
Decoding circuit module, signal input part is connected with pre-amplification circuit module by signal output, signal output part and communication
Module connects, and becomes signal source for removing carrier restoring to high frequency electrical signal；
During train driving, vehicle-mounted visible light communication module and trackside visible light communication module set up uninterrupted communication even
Connect.
The present invention further improvement is that:
Signal receiver also includes wave filter, and the signal input part of wave filter is in the signal output letter of pre-amplification circuit module
Number, the signal output part of wave filter is connected with the signal input part of decoding circuit module, for pre-amplification circuit module institute
Garbage signal in the high frequency electrical signal of output filters.
Each trackside visible light communication module is installed in each LED signal machine, the LED light in each trackside visible light communication module
Source uses the LED light source in each LED signal machine.
LED light source in vehicle-mounted visible light communication module uses the LED light source in train car light.
LED light source front is provided with motorized zoom lens.
Use and have the beneficial effects that produced by technique scheme:
It is transmission medium that the present invention sends LED cold light source by visible light communication module, replaces tradition electromagnetic transmission medium.Can
See that spectral width is radio spectrum 10,000 times, use frequency range to be above the blank frequency spectrum of 3THz, not by licence limit, solve
Certainly frequency spectrum is not and the problem of travel frequency cross jamming；The transmission range of visible light communication is more than radio propagation distance, adopts
LED light source by high-power low beam divergence angle so that the communication signal transmissions distance with visible ray as carrier is remote, so so that
The arrangement of adjacent LED semaphore is apart from far, and adjacent LED semaphore is signaled and will not interfere, and improves train-ground communication
Continuity and reliability；Visible light communication system security is high, good confidentiality, and will not impact surrounding environment；
Quickly growing of visible ray technology, has reached Gigabits per second (GB/s), has exceeded current wireless mobile communications speed, at a high speed
Communication makes to increase the extension of train-ground communication data volume, and real-time quickly improves, and disclosure satisfy that following subway signal control system
Growth requirement.Compared with prior art, it is an advantage of the current invention that: (1) utilizes visible light communication module communication to have safety joint
The advantage such as electromagnetic interference, traffic rate, can be avoided high and be accurately positioned;(2) it has been multiplexed system original LED signal machine to set
Standby, compared with tradition CBTC system, it is to avoid the installation of a large amount of instrument and equipment, it is simple to Project Realization, shorten engineering time, joint
Save engineering funds, there is important practice significance.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of vehicle-mounted visible light communication module and trackside visible light communication module in Fig. 1.
In the accompanying drawings: VOBC, onboard system；ZC, area control system；CI, interlock system；ATS, train automatic monitoring system
System；LEU, line side electronic equipment；VCL1, vehicle-mounted visible light communication module；VCL2, trackside visible light communication module.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
From the embodiment shown in Fig. 1-2, the present embodiment includes arranging equipment onboard: onboard system VOBC, also
Including the equipment being arranged on ground being linked together by order wire: area control system ZC, interlock system CI, train are automatic
Monitoring system ATS, line side electronic equipment LEU and LED signal machine, the equipment onboard that arranges also includes vehicle-mounted visible light communication
Module VCL1, vehicle-mounted visible light communication module VCL1 communicates to connect with onboard system VOBC, and each equipment being arranged on ground also wraps
Include and trackside visible light communication module VCL2 be set along Crane Rail interval, trackside visible light communication module VCL2 be arranged on ground
Each equipment communication connection, vehicle-mounted visible light communication module VCL1 is identical with each trackside visible light communication module VCL2 structure: wrap
Include the communication module for reception and transmission source signal (using Ethernet card communication), signal projector and signal receiver；
Signal projector includes:
Modulation circuit module (employing analog multiplier), signal input part is connected with communication module, uses analog multiplier logarithm
Word signal carries out carrier modulation, to be converted into high frequency electrical signal；
Drive circuit module (i.e. power amplification circuit), signal input part is connected with modulation circuit module signal output part, is used for
The high frequency electrical signal being exported modulation circuit module carries out power amplification, wants to meet the power to input signal for the LED light source
Ask；
LED light source, signal input part is connected with drive circuit module signal output part, for the height by drive circuit module output
Frequently the signal of telecommunication is converted into high frequency light signal of communication；
Signal receiver includes:
Optical filter (for LED light source color selecting green glow filter plate or ruddiness filter plate), is used for receiving LED light source and is sent
High frequency light signal of communication, it is good to LED light source penetrability, has certain barrier effect to other light sources, with to high frequency light lead to
Letter signal filters；
Photodetector (uses Amazon IMB-7011G high-speed CCD camera), and signal input part receives what optical filter was passed through
High frequency light signal of communication, for being converted into high frequency electrical signal by high frequency light signal of communication；
Pre-amplification circuit module (employing high-frequency amplifier circuit), signal input part is connected with photo detector signal output,
Faint high frequency electrical signal for exporting photodetector carries out forward voltage amplification；
Decoding circuit module (uses high frequency demodulation circuit), and signal input part is with pre-amplification circuit module by signal output even
Connecing, signal output part is connected with communication module, becomes signal source for removing carrier restoring to high frequency electrical signal；
During train driving, between vehicle-mounted visible light communication module VCL1 and trackside visible light communication module (VCL2) are set up not
Disconnected communication connection.
Signal receiver also includes wave filter (employing bandpass filter), and the signal input part of wave filter amplifies electricity in preposition
The signal output signal of road module, the signal output part of wave filter is connected with the signal input part of decoding circuit module, and it is right to be used for
Garbage signal in the high frequency electrical signal that pre-amplification circuit module is exported filters.
Each trackside visible light communication module VCL2 is installed in each LED signal machine, each trackside visible light communication module VCL2
In LED light source use the LED light source in each LED signal machine.
LED light source in vehicle-mounted visible light communication module VCL1 uses the LED light source in train car light.
LED light source front is provided with motorized zoom lens.
Operation principle:
Communication module in vehicle-mounted visible light communication module VCL1 carries out bidirectional data transfers through order wire with onboard system VOBC；
Communication module in trackside visible light communication module VCL2 carries out bi-directional data biography through order wire with each equipment being arranged on ground
Defeated；
Vehicle-mounted visible light communication module VCL1 launches signal and trackside visible light communication mould to trackside visible light communication module VCL2
Block VCL2 receipt signal process is as follows:
The signal source that the onboard system VOBC being received by the communication module in vehicle-mounted visible light communication module VCL1 is sent is through adjusting
Circuit module processed carries out carrier modulation to signal source, to be converted into high frequency electrical signal；This high frequency electrical signal is through drive circuit module
Carry out power amplification, drive LED light source to send high frequency light signal of communication；This high frequency light signal of communication is through trackside visible light communication mould
High frequency light signal of communication is filtered and receives by the optical filter of block VCL2；By photodetector, high frequency light signal of communication is changed
Become the signal of telecommunication；Premenstrual amplification circuit module of putting carries out preposition (voltage) amplification to the signal of telecommunication again, then by wave filter to preposition amplification
Garbage signal in the signal of telecommunication that circuit module is exported filters, and is reduced into high frequency electrical signal, then by decoding circuit module
Carrier restoring is removed to high frequency electrical signal and becomes signal source；Source signal is through each equipment of communication module transmission to ground, by accordingly
Equipment receives.
Otherwise, trackside visible light communication module VCL2 launches signal and vehicle-mounted visible to vehicle-mounted visible light communication module VCL1
Optical communications module VCL1 receipt signal process is as described above, repeat no more.
Claims (5)
1. the CBTC system based on visible light communication, including arrange equipment onboard: onboard system (VOBC), also includes
The equipment being arranged on ground being linked together by order wire: area control system (ZC), interlock system (CI), train are automatic
Monitoring system (ATS), line side electronic equipment (LEU) and LED signal machine, it is characterised in that: the described equipment arranging onboard
Also including vehicle-mounted visible light communication module (VCL1), described vehicle-mounted visible light communication module (VCL1) is led to onboard system (VOBC)
Letter connects, and the described each equipment being arranged on ground also includes arranging trackside visible light communication module along Crane Rail interval
(VCL2), described trackside visible light communication module (VCL2) and each equipment being arranged on ground communicate to connect, described vehicle-mounted visible
Optical communications module (VCL1) is identical with described each trackside visible light communication module (VCL2) structure: include for reception and transmission source
The communication module of signal, signal projector and signal receiver；
Described signal projector includes:
Modulation circuit module, signal input part is connected with communication module, for carrying out carrier modulation to signal source, to be converted into height
Frequently the signal of telecommunication；
Drive circuit module, signal input part is connected with modulation circuit module signal output part, for modulation circuit module institute
The high frequency electrical signal of output carries out power amplification, to meet the power requirement to input signal for the LED light source；
LED light source, signal input part is connected with drive circuit module signal output part, for having drive circuit module output
The high frequency electrical signal of certain power is converted into high frequency light signal of communication；
Described signal receiver includes:
Optical filter, for receiving the high frequency light signal of communication that LED light source is sent, it is good to LED light source penetrability, to other light
There is certain barrier effect in source, to filter high frequency light signal of communication；
Photodetector, signal input part receives the high frequency light signal of communication that optical filter is passed through, for believing high frequency light communication
It number is converted into high frequency electrical signal；
Pre-amplification circuit module, signal input part is connected with photo detector signal output, is used for defeated to photodetector
The faint high frequency electrical signal going out carries out forward voltage amplification；
Decoding circuit module, signal input part is connected with pre-amplification circuit module by signal output, signal output part and communication
Module connects, and becomes signal source for removing carrier restoring to high frequency electrical signal；
During train driving, described vehicle-mounted visible light communication module (VCL1) and described trackside visible light communication module
(VCL2) set up uninterrupted communication to connect.
2. a kind of CBTC system based on visible light communication according to claim 1, it is characterised in that: described signal receives
Device also includes wave filter, and the signal input part of described wave filter is in the signal output signal of pre-amplification circuit module, described filter
The signal output part of ripple device is connected with the signal input part of decoding circuit module, for exported pre-amplification circuit module
Garbage signal in high frequency electrical signal filters.
3. a kind of CBTC system based on visible light communication according to claim 1 and 2, it is characterised in that: described each rail
Other visible light communication module (VCL2) is installed in each LED signal machine, in described each trackside visible light communication module (VCL2)
LED light source uses the LED light source in each LED signal machine.
4. a kind of CBTC system based on visible light communication according to claim 1 and 2, it is characterised in that: described vehicle-mounted
LED light source in visible light communication module (VCL1) uses the LED light source in train car light.
5. a kind of CBTC system based on visible light communication according to claim 1, it is characterised in that: in described LED light
Front, source is provided with motorized zoom lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610508117.XA CN106160859A (en) | 2016-07-01 | 2016-07-01 | A kind of CBTC system based on visible light communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610508117.XA CN106160859A (en) | 2016-07-01 | 2016-07-01 | A kind of CBTC system based on visible light communication |
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| CN106160859A true CN106160859A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610508117.XA Pending CN106160859A (en) | 2016-07-01 | 2016-07-01 | A kind of CBTC system based on visible light communication |
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Cited By (4)
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| CN111762236A (en) * | 2020-06-29 | 2020-10-13 | 交控科技股份有限公司 | Rail transit train positioning method, device and system |
| CN111800678A (en) * | 2020-05-13 | 2020-10-20 | 清华大学 | Method and device for controlling wireless optical communication network of ultra-high-speed railway |
| CN114040361A (en) * | 2021-10-14 | 2022-02-11 | 北京和利时系统工程有限公司 | Communication system, method, device and storage medium based on LoRa and visible light |
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| CN111762236A (en) * | 2020-06-29 | 2020-10-13 | 交控科技股份有限公司 | Rail transit train positioning method, device and system |
| CN114040361A (en) * | 2021-10-14 | 2022-02-11 | 北京和利时系统工程有限公司 | Communication system, method, device and storage medium based on LoRa and visible light |
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Application publication date: 20161123 |