CN105225527A - A kind of intelligent traffic vehicle communication system with data first in first out function - Google Patents
A kind of intelligent traffic vehicle communication system with data first in first out function Download PDFInfo
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- CN105225527A CN105225527A CN201510630093.0A CN201510630093A CN105225527A CN 105225527 A CN105225527 A CN 105225527A CN 201510630093 A CN201510630093 A CN 201510630093A CN 105225527 A CN105225527 A CN 105225527A
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Abstract
A kind of intelligent traffic vehicle communication system with data first in first out function, the present invention relates to intelligent transportation system, it is intended to solve existing collision avoidance system, and to there is information acquisition scope less, data transmission poor continuity between middle controlling processor, there is the technical matterss such as the poor and potential safety hazard of real experiences in its high in the clouds intelligent transportation service and wireless technology respectively.This invention structure comprises remote information communication unit: comprising network access equipment and remote information control module; Network access equipment: comprise digital signal processing unit; Remote information control module: comprise the field programmable gate module be connected with digital signal processing unit; Visible ray short-path signal transceiver.The present invention is used for vehicle anticollision.
Description
Technical field
The present invention relates to intelligent transportation system, be specifically related to a kind of intelligent traffic vehicle communication system with data first in first out function.
Background technology
Existing vehicle-mounted collision avoidance system, by integrated large quantity sensor, gathers travel condition of vehicle in road, analyzes the possibility that whether there is collision; Although high sensor can obtain precision data, it is very limited that it gathers distance, when the speed of a motor vehicle is in middle and high speed, cannot give warning in advance, even if or give warning in advance, driver does not have time enough to dodge fully yet, thus causes possible traffic hazard.Further, in high-end car system, high in the clouds intelligent transportation service is adopted to provide certain road early warning, but consider in actual use, in view of the complicacy of road, the existence of the technical matterss such as network popularization degree and connective stability, this technology is not able to better, more widely apply always.In addition, utilize the vehicle communication technology of Wireless Fidelity, although obtain certain early warning effect, easily there is crosstalk in frequency and the transportation network control frequency of adopting wireless fidelity technology, has safely potential potential safety hazard to public transport.At present, owing to obtaining a large amount of sensing data and other information datas, middle control process the mode taked be only using field-programmable module as wiring channel, initiatively accessed the external memory storage of field-programmable model calling by digital signal processing unit, this causes data continuity to be deteriorated.But, iff using field-programmable module as wiring channel, computing then in some application can only be carried out inside digital signal processing unit, thus the processing time of meeting compression digital signal processing unit, increase the Real-time Design difficulty of digital signal processing unit, be thus difficult to the data transmission continuity ensured between field-programmable module and digital signal processing unit.Therefore, to expand and the mechanics of communication promoted between driving vehicle seems particularly important.
Summary of the invention
For above-mentioned prior art, the object of the invention is to provide a kind of intelligent traffic vehicle communication system with data first in first out function, it is intended to solve existing collision avoidance system, and to there is information acquisition scope less, data transmission poor continuity between middle controlling processor, there is the technical matterss such as the poor and potential safety hazard of real experiences in its high in the clouds intelligent transportation service and wireless technology respectively.In addition, the present invention produces far-reaching technology enlightenment to unmanned automotive development.
For achieving the above object, the technical solution used in the present invention is as follows:
There is an intelligent traffic vehicle communication system for data first in first out function, comprise sensor: probe vehicle status signal output feedback signal; Vehicle data bus: the feedback signal of receiving sensor also exports vehicle condition clock signal; Remote information communication unit: comprising network access equipment and remote information control module, network access equipment and internet carry out information interaction and output signal to remote information control module and/or remote information control module input signal to network access equipment and internet; Remote information control module is also connected with vehicle data bus; Network access equipment: comprise digital signal processing unit; Remote information control module: comprise the field programmable gate module be connected with digital signal processing unit; Field programmable gate module: comprise memory read/write control module, data processing unit, asynchronous FIFO unit, synchronization fifo unit and reading and writing data detecting unit; Visible ray short-path signal transceiver: carry out information interaction with remote information control module.
In such scheme, described memory read/write control module is used for the data reading predetermined unit from external memory storage, and the data of per unit are sent into data processing unit successively; Data processing unit is used for processing rear feeding asynchronous FIFO unit to the data of per unit; Asynchronous FIFO unit sends into synchronization fifo unit after being used for carrying out clock zone conversion to the data of predetermined unit; Synchronization fifo unit is used for the data that buffer memory asynchronous FIFO unit is sent into, and when the data of buffer memory reach predetermined unit, sends look-at-me to digital signal processing unit; Digital signal processing unit is used for according to look-at-me from synchronization fifo unit reads data; Reading and writing data detecting unit is used for when detecting that digital signal processing unit has often read the data of a unit, feedback signal is sent, with the data making memory read/write control module to read next unit from external memory storage according to feedback signal to memory read/write control module.The stability of data significantly promotes.
In such scheme, preferably, described sensor, comprises alignment sensor and/or tachogenerator.The velocity information of real-time detection automobile and/or positional information.
In such scheme, preferably, described feedback signal, comprises the signal with automobile position longitude and latitude and/or driving speed information feature.
In such scheme, preferably, described vehicle data bus, is connected with danger button.In, lower security collision rank time, provide user and optionally reported to the police by remote information communication unit; During high collision rank, remote information communication unit automatic alarm.
In such scheme, preferably, described network access equipment, comprises the digital signal transceiver of accessing Internet: input and/or outputting communication signal; Digital signal processing unit: process, reception and/or transmission communication signal; Sound synthesizer: receive and/or send voice communication signal; Sound synthesizer is also connected with microphone and loudspeaker; Digital signal processing unit is also connected with Charge Coupled Device (CCD) CCD.Network access equipment provides high in the clouds transport services access port; Digital signal processing unit, achieves the center-control of Car warning system; After collision occurs, Intelligent treatment is reported to the police, and provides high in the clouds transport services audio access and accident video record.
In such scheme, described remote information control module, comprises field programmable gate module: accepting state clock signal, exports and controls clock signal and/or communication clock signal.For digital signal processing unit provides auxiliary process, auxiliary input and/or auxiliary output.
In such scheme, described visible ray short-path signal transceiver, connects field programmable gate module: light signal and electric signal are changed, and receives and/or sends photoelectric communication signal; Optical fiber link comprising with field programmable gate model calling: comprising signal transmitting path and Signal reception path; The ASIC be connected with optical fiber link: send and/or received code electric signal; Photoelectric communication device: light signal and/or electric signal are changed, receives and/or sends coded signal.Provide not by short distance optical communication between the vehicle of high in the clouds transport services; Optical communication can not crosstalk public transport wireless frequency; There is high information transmission stability.
In such scheme, preferably, described visible ray short-path signal transceiver, also comprises laser radar.
In such scheme, preferably, described coded signal, comprises the coded light signal with IEEE802.15.7 agreement definition Physical layer and medium access control layer; Also comprise the electric signal with encoded clock.Use in agreement " 0 " and " 1 " that Synchronization realizes in data.Achieve the optical communication of car speed and/or positional information and/or electric communication coding.
Beneficial effect of the present invention: in real time and not via high in the clouds transport services, vehicle driving information near driving vehicle obtains, driver obtains possible anti-collision warning in advance; Between middle controlling processor, the stability of data transmission significantly promotes; Collision accident carries out intelligent alarm process after occurring; Communication frequency can not crosstalk public transport wireless frequency, expands communication bandwidth, and the high and communication efficiency of stability significantly promotes.
Accompanying drawing explanation
Fig. 1 is modular structure schematic diagram of the present invention;
Fig. 2 is visible ray short-path signal transceiver embodiments schematic diagram of the present invention;
Fig. 3 is trans-impedance amplifier embodiment schematic diagram of the present invention;
Fig. 4 is that the present invention uses first in first out communication schematic diagram;
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 speed, 5_DE. & Drive, 9_DE. & Drive-postemphasises driver, 6_ASIC-special IC, 7_CDR-clock and data recovery, 8_MUX-traffic pilot, 11_LEDDR.-LED drive, 12_TIA-trans-impedance amplifier, 13_LED-light emitting diode, 14_PIND., D1, D2, D3-photodiode, 17-field programmable gate module, Zpd-impedance, Vpd-impedance voltage, LFC-photoelectric communication device, FIFO-first in first out.
Embodiment
All features disclosed in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Below in conjunction with accompanying drawing, the present invention will be further described:
Fig. 1 is modular structure schematic diagram of the present invention, a kind of intelligent traffic vehicle communication system with data first in first out function, comprise remote information communication unit: comprising network access equipment and remote information control module, network access equipment and internet carry out information interaction and output signal to remote information control module and/or remote information control module input signal to network access equipment and internet; Network access equipment: comprise digital signal processing unit; Remote information control module: comprise the field programmable gate module be connected with digital signal processing unit; Field programmable gate module: comprise memory read/write control module, data processing unit, asynchronous FIFO unit, synchronization fifo unit and reading and writing data detecting unit; Visible ray short-path signal transceiver: carry out information interaction with remote information control module.During use, present system is mounted in various vehicle.
Embodiment 1
Fig. 2 is visible ray short-path signal transceiver embodiments schematic diagram of the present invention, and described optical fiber link, comprises signal transmitting path and Signal reception path.
Embodiment 2
Field programmable gate module 17: at least export two electric signal, each electrical signal rate is at least greater than 1Gbps/s.Signal transmitting path, comprises the first balanced device 1a: connect field programmable gate module 17 by hypervelocity Ethernet interface XLAUI, receives electric signal; CDR & deserializer 2: receive the electric signal after the first balanced device 1a compensation, carry out clock and data recovery and unstring; Phase compensator 3: the electric signal receiving CDR & deserializer 2, carries out phase-fitting between the dynamic and stalic state electric signal; Serializer 4: the electric signal after receiving phase compensator 3 matching, exports serial electric signal; Postemphasis driver 5: the electric signal receiving serializer 4, carries out postemphasising and amplifieroperation, exports electric signal; ASIC6: connect the driver 5 that postemphasises by physical medium associated layers interface PMD.
Embodiment 3
Signal reception path, comprises ASIC6: receive the electric signal that photoelectric communication device LFC uploads; Second balanced device 1a: receive the electric signal that ASIC sends the first balanced device 1a in respective signal transmitting path; CDR7: receive the electric signal after the second balanced device 1a compensation, carry out clock and data recovery; Traffic pilot 8: receive the electric signal after CDR7 recovers, export at least two Half Speed electric signal; Postemphasis driver 9: the Half Speed electric signal receiving traffic pilot 8, carries out postemphasising and amplifieroperation.Field programmable gate module 17: connect the driver 9 that postemphasises by hypervelocity Ethernet interface XLAUI, at least receives two Half Speed electric signal.
Embodiment 4
Described photoelectric communication device LFC, comprises LED driver 11: connect ASIC6 by transfer bus, exports control signal; LED (13): the control signal receiving LED driver 11, sends light signal according to electric signal particular sequence pattern; PIN photodiode 14: receiving optical signals, is converted to electric signal; Trans-impedance amplifier 12: connect ASIC6 by transfer bus, receives the electric signal of PIN photodiode 14, exports ASIC6 to.
Embodiment 5
Fig. 3 is trans-impedance amplifier embodiment schematic diagram of the present invention, and described trans-impedance amplifier 12 comprises cross-linked first couple of differential input transistor Q1, Q2 and second couple of differential input transistor Q3, Q4; Each transistor base is connected with electric capacity, grounded emitter; Cross-coupled manner can under high frequency input, effectively reduce input signal response modes because of impedance Z pd1, impedance Z pd2 cause feature weaken effect; Resistance R3 and resistance R4 can provide dot peak detection and increase bandwidth; D1, D2, D3 are the photodiode of line arrangement.
Embodiment 6
LED 13 lamp choosing wavelength is interval at 850nm, 1310nm, 1490nm, CW-DM, 1550nm, DWDM; LED quantity and arrangement comprise lattice array and/or linear array and/or face array and/or body arrangement; The mode of enabling is photoinduction startup, passive light startup, the selection of optoacoustic control combination technology, the mechanically integrated module of photoinduction and/or alternatives.
Embodiment 7
In communication process, based on above embodiment, LED 13 sends packet, and photodiode 14 completes clock synchronous by connecting ASIC6 across sufficient amplifier 12, ensures the time accuracy that sampling occurs; LED driver 11 arranges the light period of LED13 in advance, keeps and the photodiode 14 same cycle, sends single data delay and be no more than 3ms in one-period.In receiving course, when 1/4, LED13 of the leading LED13 light period of photodiode 14 clock sends logical zero (lower optical densities), photodiode 14 starts to sample 1; When LED13 sends logical one (high light intensity), photodiode 14 starts to sample 2, ASIC6 and compares two and sample and obtain coded message.In the present invention, the LED switching rate that " flickers " is very high, and " bright " duration is extremely short, and human eye can not be experienced, and can not have influence on vehicle driving safety.
Embodiment 8
Fig. 4 is that the present invention uses first in first out communication schematic diagram, and described digital signal processing unit is used for the pulse width reading control signal to be set to two clock period; Synchronization fifo unit is used for exporting data when first clock period of reading control signal being detected to digital signal processing unit, does not deal with when second clock period of reading control signal being detected.Wherein, by a large amount of experimental verifications, meeting synchronous feedback clock when digital signal processing unit sends reading control signal to field programmable gate module, after this clock reaches higher speed, the driving force of this clock itself weakens, often can not the interface logic of stabilized driving field programmable gate module, and the pulse width reading control signal is set to two clock period, the level change of the reading control signal sent by monitoring digital signal processing unit, thus programmable gate inside modules produces the enable signal that is read synchronization fifo unit at the scene, with this solve field programmable gate module internal clock and digital signal processing unit send the clock reading the nonsynchronous problem of control signal phase place and feed back because of digital signal processing unit the problem that weakens of driving force.
There is unknown mutation in hardware advances, the progress of technology is the reference of selection standard.But for changing bad invention, or cost viewpoint, only from the selection of technical scheme of practicality.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly belongs to those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.
Claims (6)
1. there is an intelligent traffic vehicle communication system for data first in first out function, it is characterized in that, comprise
Remote information communication unit: comprising network access equipment and remote information control module, network access equipment and internet carry out information interaction and output signal to remote information control module and/or remote information control module input signal to network access equipment and internet;
Network access equipment: comprise digital signal processing unit;
Remote information control module: comprise the field programmable gate module be connected with digital signal processing unit;
Field programmable gate module: comprise memory read/write control module, data processing unit, asynchronous FIFO unit, synchronization fifo unit and reading and writing data detecting unit;
Visible ray short-path signal transceiver: carry out information interaction with remote information control module.
2. a kind of intelligent traffic vehicle communication system with data first in first out function according to claim 1, it is characterized in that, described network access equipment, comprises
The digital signal transceiver of accessing Internet: input and/or outputting communication signal;
Digital signal processing unit: process, reception and/or transmission communication signal;
Sound synthesizer: receive and/or send voice communication signal.
3. a kind of intelligent traffic vehicle communication system with data first in first out function according to claim 1, it is characterized in that, described remote information control module, comprise field programmable gate module: accepting state clock signal, export and control clock signal and/or communication clock signal.
4. a kind of intelligent traffic vehicle communication system with data first in first out function according to claim 1, it is characterized in that, described visible ray short-path signal transceiver, connect field programmable gate module: light signal and electric signal are changed, receive and/or send photoelectric communication signal; Comprising
With the optical fiber link of field programmable gate model calling: comprising signal transmitting path and Signal reception path;
The ASIC be connected with optical fiber link: send and/or received code electric signal;
Photoelectric communication device: light signal and/or electric signal are changed, receives and/or sends coded signal.
5. a kind of intelligent traffic vehicle communication system with data first in first out function according to claim 4, is characterized in that, described coded signal, comprises the coded light signal with IEEE802.15.7 agreement definition Physical layer and medium access control layer; Also comprise the electric signal with encoded clock.
6. a kind of intelligent traffic vehicle communication system with data first in first out function according to claim 1, it is characterized in that, described memory read/write control module is used for the data reading predetermined unit from external memory storage, and the data of per unit are sent into data processing unit successively; Data processing unit is used for processing rear feeding asynchronous FIFO unit to the data of per unit; Asynchronous FIFO unit sends into synchronization fifo unit after being used for carrying out clock zone conversion to the data of predetermined unit; Synchronization fifo unit is used for the data that buffer memory asynchronous FIFO unit is sent into, and when the data of buffer memory reach predetermined unit, sends look-at-me to digital signal processing unit; Digital signal processing unit is used for according to look-at-me from synchronization fifo unit reads data; Reading and writing data detecting unit is used for when detecting that digital signal processing unit has often read the data of a unit, feedback signal is sent, with the data making memory read/write control module to read next unit from external memory storage according to feedback signal to memory read/write control module.
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Application publication date: 20160106 |