CN108880678A - A kind of intelligent transportation system based on the covering of platform formula - Google Patents
A kind of intelligent transportation system based on the covering of platform formula Download PDFInfo
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- CN108880678A CN108880678A CN201810383199.9A CN201810383199A CN108880678A CN 108880678 A CN108880678 A CN 108880678A CN 201810383199 A CN201810383199 A CN 201810383199A CN 108880678 A CN108880678 A CN 108880678A
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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
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Abstract
A kind of intelligent transportation system based on the covering of platform formula solves existing unmanned traffic system communication reliability and the low technical problem of safety the present invention relates to intelligent transportation system.The inventive structure feature includes the base station Li-Fi：Including optical fiber link, the connection of access end Yu internet end is established, handles electric signal, receives and/or send electric signal；Intelligent public transportation platform：Including photoelectric communication device, receives the electric signal of the base station Li-Fi and be converted to optical signal transmission；Unmanned Intelligent public transportation tool：Including photoelectric communication device, receives the optical signal of Intelligent public transportation platform and/or send optical signal to Intelligent public transportation platform.The present invention is accessed for intelligent transportation high speed network.
Description
Technical field
The present invention relates to intelligent transportation systems, and in particular to a kind of intelligent transportation system based on the covering of platform formula.
Background technique
In existing traffic system, passenger has strong demand in tired to internet access during the journey.In the prior art,
Generally, passenger's personal use LTE technology carries out internet access, and 2G access speed is low, and 3G/4G campus network is excessively high
It is expensive；Secondly, the mobile Wi-Fi of public transport, which shares network, largely belongs to local area network, access is limited, and logical to public transport
News have an impact, and there are security risks；Finally, satellite communication technology civil nature and not perfect, feasibility makes us querying.To sum up institute
It stating, in existing traffic system, can not realize the networking of intelligent transportation well, passenger cannot obtain high speed network experience,
The market demand cannot be satisfied.So the present invention discloses a kind of intelligent transportation system of offer high speed network access.
As depth learning technology develops, the vehicles are also with moving towards unmanned.But it is calculated based on current base
Ability, software code degree for the treatment of and from the point of view of the deep learning framework stage, distance thoroughly convert the vehicles to it is unmanned, also
Have and need to spend for quite a long time, reason has very much, such as the sample of deep learning, can never choose most perfect, culvert
The sample set of lid all situations, in another example classifier, decision-making capability will seriously be influenced by encountering situation type, cannot
With the mankind for the creativeness that solves the problems, such as.So, an impossible complete unmanned intelligent transportation system is constructed with it
System, not as good as allowing the vehicles to continue with operator.The prior art has had certain technology development, such as unmanned plane to this
System allows driver remotely operating to unmanned plane, still, is held by the long-range control that satellite radio signal is realized
It is easily held as a hostage and is easy by such environmental effects.
Summary of the invention
For the above-mentioned prior art, it is an object of that present invention to provide a kind of intelligent transportation system based on the covering of platform formula,
Solve existing unmanned traffic system communication reliability and the low technical problem of safety.
In order to achieve the above objectives, the technical solution adopted by the present invention is as follows：
A kind of intelligent transportation system based on the covering of platform formula, including the base station Li-Fi：Including optical fiber link, access is established
The connection at end and internet end handles electric signal, receives and/or send electric signal；Intelligent public transportation platform：Including light
Electric communication device receives the electric signal of the base station Li-Fi and is converted to optical signal transmission；Unmanned Intelligent public transportation tool：Wherein
Including photoelectric communication device, receives the optical signal of Intelligent public transportation platform and/or send optical signal to Intelligent public transportation station
Platform；Intelligent public transportation platform receives the optical signal that unmanned Intelligent public transportation tool issues, and transmitting photo-signal is on electric signal
Reach the base station Li-Fi.
In above scheme, the optical fiber link, including signal transmitting path and signal receiving path.
In above scheme, the signal transmitting path, including ASIC：At least export two electric signals, each electric signal
Rate is at least more than 1Gbps/s；Balanced device：ASIC is connected by ultrahigh speed Ethernet interface, receives electric signal；CDR& unstrings
Device：Electric signal after receiving equalizer compensation carries out clock and data recovery and unstrings；Phase compensator：CDR& is received to unstring
The electric signal of device carries out phase-fitting between dynamic and static electric signal；Serializer：Telecommunications after the fitting of receiving phase compensator
Number, export serial electric signal；Postemphasis driver：The electric signal for receiving serializer, is postemphasised and is enlarged, output electricity
Signal；FPGA：Layer interface, which is associated with, by physical medium connects the driver that postemphasises.Balanced device can equivalent high-pass filter, to biography
High communication number loss balancing during defeated increases signal fidelity；High-speed serial signals are converted to parallel signal by deserializer,
CDR carries out recovery coding to clock in signal and data；Postemphasis driver, using the mode of postemphasising keep signal rising edge and
The amplitude of falling edge is constant, and signal weakens elsewhere, adjusts signal-to-noise ratio, increases signal fidelity；FPGA increases system
Versatility reduces system cost.
In above scheme, the signal receiving path, including FPGA：Receive the telecommunications that Intelligent public transportation platform uploads
Number；Balanced device：FPGA sending is received to the electric signal of balanced device in induction signal transmitting path；CDR：After receiving equalizer compensation
Electric signal carries out clock and data recovery；Multiplexer：The electric signal after CDR restores is received, at least two Half Speeds are exported
Electric signal；Postemphasis driver:The Half Speed electric signal for receiving multiplexer, is postemphasised and is enlarged；ASIC：Pass through
Ultrahigh speed Ethernet interface connects the driver that postemphasises, and at least receives two Half Speed electric signals.Multiplexer makes full use of logical
The capacity for believing channel, substantially reduces the cost of system.
In above scheme, the photoelectric communication device, including LED driver：Li-Fi base is connected by transfer bus
It stands, output control signal；LED：The control signal for receiving LED driver issues optical signal according to electric signal particular sequence mode；
PIN photodiode：Optical signal is received, electric signal is converted to；Trans-impedance amplifier：The base station Li-Fi is connected by transfer bus, is connect
Receive the electric signal of PIN photodiode, output to the base station Li-Fi.The trans-impedance amplifier, including cross-linked first pair
Differential input transistor and second pair of differential input transistor.It realizes the input and output of high frequency Fidelity signal, has more extensive
Bandwidth and not by control, trans-impedance amplifier structure is simpler, lower cost, can be mass that be installed to intelligent road public
In traffic platform.
In above scheme, the photoelectric communication device and the base station Li-Fi use during optical communication
IEEE802.15.7 protocol definition physical layer and medium access control layer.It is realized in data in agreement using Synchronization
" 0 " and " 1 ".
In above scheme, the unmanned Intelligent public transportation tool further includes the processor for connecting photoelectric communication device,
Processor is connected with Wi-Fi device.There is the technology status of Wi-Fi function mostly for existing mobile terminal device, and then complete
It is docked at the prior art, and increases system universality.
In above scheme, the LED driver, including monostable trigger unit.It can be saved when without using LED communication
The energy.
In above scheme, the unmanned Intelligent public transportation tool（300）, pass through the base station Li-Fi（100）With intelligent public affairs
Traffic platform altogether（200）It is controlled by operating terminal group.
In above scheme, the unmanned Intelligent public transportation tool（300）, there is deep learning computing architecture.
Compared with prior art, beneficial effects of the present invention：It realizes easily network access in transport process, meets
The market demand provides low-cost light communication system, expands communication bandwidth, has higher stability, safety and versatility.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention；
Fig. 2 is trans-impedance amplifier circuit diagram in the present invention；
Fig. 3 is that signal receives sampling schematic diagram in the present invention；
In figure：1a_EQ, 1b_EQ- balanced device, 2_CDR&SER.- clock and data recovery and deserializer, 3_DSW- phase compensator,
The serializer of 4_20Gbps&SER.-20Gbps rate, 5_DE.&Drive, 9_DE.&Drive- postemphasis driver, 6_FPGA-
Field programmable gate array, 7_CDR- clock and data recovery, 8_MUX- multiplexer, 10- photoelectric communication device, 11_LED
DR.- LED drive, 12_TIA- trans-impedance amplifier, 13_LED- light emitting diode, two pole of 14_PIN D.- photoelectricity
Pipe, 15_WiFi- wireless universal fidelity device, 16_CPU- central processing unit, 17_ASIC- specific integrated circuit, Zpd- impedance,
Vpd- impedance voltage, VDD- power supply, Q1, Q2, Q3, Q4- triode.
Specific embodiment
All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive
Feature and/or step other than, can combine in any way.
The present invention will be further described with reference to the accompanying drawing：
Embodiment 1
Fig. 1 is schematic structural view of the invention, a kind of intelligent transportation system based on the covering of platform formula, including the base station Li-Fi 100：
Including optical fiber link, the connection of access end Yu internet end is established, handles electric signal, receives and/or send electric signal；Intelligence
It can public transport platform 200：Including photoelectric communication device 10, receives the electric signal of the base station Li-Fi 100 and be converted to light letter
Number send；Unmanned Intelligent public transportation tool 300：Including photoelectric communication device 10, Intelligent public transportation platform 200 is received
Optical signal and/or send optical signal to Intelligent public transportation platform 200；Intelligent public transportation platform 200 receives unmanned intelligence
The optical signal that public transport 300 issues, transmitting photo-signal are that electric signal is uploaded to the base station Li-Fi 100.The operation is whole
Group is held, it can be by largely calculating device build, such as server zone or by PC terminal, by each operator to each unmanned intelligence
Public transport 300 is remotely operated, existing to defend with the stabilization for crossing high speed Li-Fi signal guarantee operation signal and reliably
Star signal, 4G Lite, 5G signal can not obtain speed, the safety and stablization of communication architecture of the present invention.
Fig. 2 is trans-impedance amplifier circuit diagram in the present invention, the trans-impedance amplifier 12, including cross-linked first pair
Differential input transistor Q1, Q2 and second couple of differential input transistor Q3, Q4；Each transistor base is connected with capacitor, emitter
Ground connection；Input signal response modes can be effectively reduced because impedance Z pd1, impedance Z pd2 draw under high frequency input in cross-coupled manner
The feature risen weakens effect；Resistance R3 and resistance R4 can provide dot peak detection and increase bandwidth.
Fig. 3 is that signal receives sampling schematic diagram in the present invention, and Light-emitting diode LED 13 issues data packet, photodiode
14 complete the time accuracy that clock is synchronous, and guarantee sampling occurs by connecting FPGA6 across sufficient amplifier 12；LED driver 11
The light period of LED13, holding and the same period of photodiode 14 are set in advance, single data delay is sent in a cycle not
More than 3ms.In receive process, 1/4, LED13 of the leading LED13 light period of 14 clock of photodiode issues logical zero
（Lower optical densities）When, photodiode 14 starts sampling 1；LED13 issues logical one（High light intensity）When, photodiode 14
Start sampling 2, FPGA6 compares two samplings.
In Fig. 3, the curve of photodiode PIN.D3, photodiode PIN.D3 sample 1,2 energy it is equal, LED13 and
Photodiode PIN.D3 clock phase exceeds two sampling periods, and it may be to lead since ambient light is too weak that this occurs
Cause reception optical density too low.Therefore, communication algorithm should include that in two sampled signals, at least guaranteeing one is to be detected as
Logical one.For example, FPGA6 identifies that clock closes 2 periods if sampled signal 1,2 is without departing from determining threshold value, go forward side by side
Row clock adjustment；If after the adjustment, sampled signal 1,2 is then judged to inputting currently without light source again without being more than threshold value
Synchronous signal mode.
The optional range of wavelengths of LED13 lamp is in 850nm, 1310nm, 1490nm, CW- DM, 1550nm, DWDM；Enabling mode
It is photoinduction starting, passive photopolymerization initiation, optoacoustic control combination technology, the mechanically integrated module of photoinduction and/or the optional choice of technology.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Belong to those skilled in the art in the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of, all answers
It is included within the scope of the present invention.
Claims (10)
1. a kind of intelligent transportation system based on the covering of platform formula, which is characterized in that including
The base station Li-Fi（100）：Including optical fiber link, the connection of access end Yu internet end is established, electric signal is handled, connects
Receive and/or send electric signal；
Intelligent public transportation platform（200）：Including photoelectric communication device（10）, receive the base station Li-Fi（100）Electric signal
And be converted to optical signal transmission；
Unmanned Intelligent public transportation tool（300）：Including photoelectric communication device（10）, receive Intelligent public transportation platform
（200）Optical signal and/or send optical signal to Intelligent public transportation platform（200）；
Intelligent public transportation platform（200）Receive unmanned Intelligent public transportation tool（300）The optical signal of sending, transmitting photo-signal
For electric signal and it is uploaded to the base station Li-Fi（100）.
2. a kind of intelligent transportation system based on the covering of platform formula according to claim 1, which is characterized in that the light
Fine link, including signal transmitting path and signal receiving path.
3. a kind of intelligent transportation system based on the covering of platform formula according to claim 2, which is characterized in that the letter
Number transmitting path, including
ASIC（17）：Two electric signals are at least exported, each electrical signal rate is at least more than 1Gbps/s；
Balanced device（1a）：Pass through ultrahigh speed Ethernet interface XLAUI connection ASIC（17）, receive electric signal；
CDR& deserializer（2）：Receive balanced device（1a）Compensated electric signal carries out clock and data recovery and unstrings；
Phase compensator（3）：Receive CDR& deserializer（2）Electric signal, carrying out phase-fitting between dynamic and static electric signal；
Serializer（4）：Receiving phase compensator（3）Electric signal after fitting exports serial electric signal；
Postemphasis driver（5)：Receive serializer（4）Electric signal, postemphasised and be enlarged, export electric signal；
FPGA（6）：Layer interface PMD connection is associated with by physical medium to postemphasis driver（5）.
4. a kind of intelligent transportation system based on the covering of platform formula according to claim 2, which is characterized in that the letter
Number receiving path, including
FPGA（6）：Receive Intelligent public transportation platform（200）The electric signal of upload；
Balanced device（1b）：FPGA is received to issue to balanced device in induction signal transmitting path（1a）Electric signal；
CDR（7）：Receive balanced device（1b）Compensated electric signal carries out clock and data recovery；
Multiplexer（8）：It receives through CDR（7）Electric signal after recovery exports at least two Half Speed electric signals；
Postemphasis driver（9):Receive multiplexer（8）Half Speed electric signal, postemphasised and be enlarged；
ASIC（17）：It is postemphasised driver by the XLAUI connection of ultrahigh speed Ethernet interface（9) two Half Speed electricity, are at least received
Signal.
5. a kind of intelligent transportation system based on the covering of platform formula according to claim 1, which is characterized in that the light
Electric communication device（10）, including
LED driver (11)：The base station Li-Fi (100) are connected by transfer bus, output control signal；
LED(13)：The control signal for receiving LED driver (11) issues optical signal according to electric signal particular sequence mode；
PIN photodiode（14）：Optical signal is received, electric signal is converted to；
Trans-impedance amplifier（12）：The base station Li-Fi (100) are connected by transfer bus, receive PIN photodiode（14）Telecommunications
Number, output to the base station Li-Fi (100).
6. it is according to claim 5 it is a kind of based on platform formula covering intelligent transportation system, which is characterized in that it is described across
Impedance amplifier（12）, including cross-linked first pair of differential input transistor（Q1,Q2）With second pair of differential input transistor
（Q3,Q4）.
7. a kind of intelligent transportation system based on the covering of platform formula according to claim 1, which is characterized in that the light
Electric communication device（10）With the base station Li-Fi（100）, during optical communication, use IEEE802.15.7 protocol definition physical layer
And medium access control layer.
8. a kind of intelligent transportation system based on the covering of platform formula according to claim 1, which is characterized in that the nothing
People's Intelligent public transportation tool（300）, further include connection photoelectric communication device（10）Processor（16）, processor（16）Connection
There is Wi-Fi（15）Device.
9. a kind of intelligent transportation system based on the covering of platform formula according to claim 1, which is characterized in that the nothing
People's Intelligent public transportation tool（300）, pass through the base station Li-Fi（100）With Intelligent public transportation platform（200）It is controlled by operation eventually
Hold group.
10. a kind of intelligent transportation system based on the covering of platform formula according to claim 1 or described in 9, which is characterized in that described
Unmanned Intelligent public transportation tool（300）, there is deep learning computing architecture.
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| CN201810383199.9A CN108880678A (en) | 2018-04-26 | 2018-04-26 | A kind of intelligent transportation system based on the covering of platform formula |
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| CN201810383199.9A CN108880678A (en) | 2018-04-26 | 2018-04-26 | A kind of intelligent transportation system based on the covering of platform formula |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049117A (en) * | 2015-07-06 | 2015-11-11 | 成都弘毅天承科技有限公司 | Intelligent traffic system based on visible light communication |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105049117A (en) * | 2015-07-06 | 2015-11-11 | 成都弘毅天承科技有限公司 | Intelligent traffic system based on visible light communication |
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Application publication date: 20181123 |
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