CN101741493A - IP platform-based on-vehicle integrated information system - Google Patents
IP platform-based on-vehicle integrated information system Download PDFInfo
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- CN101741493A CN101741493A CN200810202707A CN200810202707A CN101741493A CN 101741493 A CN101741493 A CN 101741493A CN 200810202707 A CN200810202707 A CN 200810202707A CN 200810202707 A CN200810202707 A CN 200810202707A CN 101741493 A CN101741493 A CN 101741493A
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Abstract
The invention discloses an IP platform-based on-vehicle integrated information system. The system comprises a control centre server, an on-vehicle communication network and a vehicle-ground communication network, wherein the on-vehicle communication network comprises an on-vehicle switch and network cables; the vehicle-ground communication network comprises a wireless switch, a centre switch, a station switch, an optical transmitter and receiver, more than one inter-zone wireless access point and an on-vehicle wireless access point, wherein the on-vehicle wireless access point is connected with the inter-zone wireless access point through a wireless network and is connected with the on-vehicle switch through the network cables; and the centre switch is connected with the control centre server. An on-vehicle passenger information system, an on-vehicle broadcasting system and an on-vehicle closed circuit television monitoring system all adopt a TCP/IP protocol to access an on-vehicle local area network which is connected with a station server and the control centre server through the wireless network. The IP platform-based on-vehicle integrated information system can realize interactions comprising the transmission of traffic information of a train and live video streams and the uploading of on-vehicle video streams, and has low maintenance and management cost and high information transmission efficiency.
Description
Technical field:
The present invention relates to physical field, relate in particular to information processing and communications, particularly issue of passenger's audiovisual information and video flowing are uploaded technology, and concrete is a kind of vehicle integrated information system based on the IP platform.
Background technology:
Track traffic becomes the first-selected trip mode in city gradually.Because train and track all move under closed state, train is restricted with the information interaction of outside.The passenger can not obtain external information immediately, and monitor message can not reach control centre immediately in the train.In addition, in the prior art, vehicle-mounted passenger information system, supervisory control system and broadcast system are separate, maintenance management cost height, the interlock efficient low.
Summary of the invention:
The purpose of this invention is to provide a kind of vehicle integrated information system based on the IP platform, that described this vehicle integrated information system based on the IP platform will solve is separate between vehicle-mounted passenger information system, supervisory control system and the broadcast system in the prior art, maintenance management cost height, inefficient technical problem links.
This vehicle integrated information system based on the IP platform of the present invention comprises control centre's server, vehicle-carrying communication network and train-ground communication network, wherein, include vehicle-mounted switch in the described vehicle-carrying communication network, network cable, vehicle-mounted passenger information system, vehicle-mounted broadcast system and vehicle-mounted close-circuit television,closed-circuft televishon, described vehicle-mounted passenger information system, vehicle-mounted broadcast system is connected with described vehicle-mounted switch by network cable respectively with vehicle-mounted close-circuit television,closed-circuft televishon, include wireless exchange board in the described train-ground communication network, center switch, the station switch, optical transceiver, the interval WAP (wireless access point) and the vehicle-mounted wireless access point of an above number, described wireless exchange board is connected with described center switch by optical fiber, described station switch is connected with center switch by optical fiber, any one described interval WAP (wireless access point) all is connected with described optical transceiver by cable, described optical transceiver is connected with the station switch by cable, interval WAP (wireless access point) is arranged on the rail limit, the signal cover of any two adjacent interval WAP (wireless access point) all has the overlapping region, described vehicle-mounted wireless access point is connected with interval WAP (wireless access point) by wireless network, vehicle-mounted wireless access point is connected with vehicle-mounted switch by network cable, and center switch is connected with described control centre server.
Further, the WAP (wireless access point) between the setting area separately on up rail limit and down track limit, the interval WAP (wireless access point) on up rail limit and the interval WAP (wireless access point) on down track limit are connected in two wireless networks.
Further, be connected with workstation computer on the described center switch.
Further, any one described interval WAP (wireless access point) all is connected with directional antenna.
Further, be provided with the wireless network monitoring facilities in the described control centre server.
Further, described vehicle-mounted passenger information system includes two chassis and carries Play Server, liquid crystal display terminal, the diode displaying terminal, digital video broadcasting set-top box and look the audio decoder distributor, described digital video broadcasting set-top box and look the audio decoder distributor and be connected to described vehicle-mounted Play Server by cable respectively, described liquid crystal display terminal and diode displaying terminal are connected to by cable respectively and look the audio decoder distributor, described two chassis carry Play Server Hot Spare each other, vehicle-mounted Play Server is respectively by central server, station switch signal and vehicle-mounted input device controls, the control authority of station switch signal greater than with the control authority of vehicle-mounted input equipment, the control authority of central server is greater than the control authority of station switch signal.
Further, described vehicle-mounted broadcast system includes audiogenic device, digital IP main control card, IP network voice frequency terminal, IP paging microphone, power amplifier and loud speaker, described audiogenic device is connected with described power amplifier by voice-frequency cable, described loud speaker is connected with power amplifier, described digital IP main control card is connected with IP paging microphone with the IP network voice frequency terminal, and power amplifier is connected with the IP network voice frequency terminal by voice-frequency cable.
Further, described vehicle-mounted close-circuit television,closed-circuft televishon includes the vehicle-mounted vidicon of an above number, the Vehicular video encoder of an above number, antidetonation In-vehicle networking video cassette recorder and vehicle-mounted industrial ethernet ring network switch, any one described vehicle-mounted vidicon all is connected with a described Vehicular video encoder separately, any one Vehicular video encoder all is connected with described vehicle-mounted industrial ethernet ring network switch by Shielded Twisted Pair, described antidetonation In-vehicle networking video cassette recorder is connected with vehicle-mounted industrial ethernet ring network switch, and vehicle-mounted industrial ethernet ring network switch is connected with described vehicle-mounted switch by network cable.
Operation principle of the present invention is: vehicle-mounted passenger information system, vehicle-mounted broadcast system and vehicle-mounted close-circuit television,closed-circuft televishon all adopt ICP/IP protocol to insert vehicle-mounted LAN, vehicle-mounted LAN is connected by the server of wireless network with station and control centre, realizes that uploading of the issuing of train travel information, live video stream, vehicle-mounted CCTV video flowing etc. is mutual.
The present invention and prior art compare, and its effect is actively with tangible.The present invention adopts ICP/IP protocol to insert vehicle-mounted LAN vehicle-mounted passenger information system, vehicle-mounted broadcast system and vehicle-mounted close-circuit television,closed-circuft televishon, vehicle-mounted LAN is connected by the server of wireless network with station and control centre, can realize that uploading of the issuing of train travel information, live video stream, vehicle-mounted CCTV video flowing is mutual.But train and outside real time bidirectional are mutual, and the passenger can obtain external information immediately, and monitor message can reach control centre immediately in the train, and the maintenance management cost is low, the information transfer efficiency height.
Description of drawings
Fig. 1 is the schematic diagram of the vehicle integrated information system based on the IP platform of the present invention.
Fig. 2 is the schematic diagram based on the vehicle-mounted passenger information system in the vehicle integrated information system of IP platform of the present invention.
Fig. 3 is the schematic diagram based on the vehicle-mounted broadcast system in the vehicle integrated information system of IP platform of the present invention.
Fig. 4 is the schematic diagram based on the vehicle-mounted close-circuit television,closed-circuft televishon in the vehicle integrated information system of IP platform of the present invention.
Embodiment
As shown in Figure 1, vehicle integrated information system based on the IP platform of the present invention comprises control centre's server 1, vehicle-carrying communication network and train-ground communication network, wherein, include vehicle-mounted switch 2 in the described vehicle-carrying communication network, network cable, vehicle-mounted passenger information system, vehicle-mounted broadcast system and vehicle-mounted close-circuit television,closed-circuft televishon, described vehicle-mounted passenger information system, vehicle-mounted broadcast system is connected with described vehicle-mounted switch 2 by network cable respectively with vehicle-mounted close-circuit television,closed-circuft televishon, include wireless exchange board in the described train-ground communication network, center switch 4, the station switch, optical transceiver 5, the interval WAP (wireless access point) 6 of an above number and vehicle-mounted wireless access point 7, described wireless exchange board is connected with described center switch 4 by optical fiber, described station switch is connected with center switch 4 by optical fiber, any one described interval WAP (wireless access point) 6 all is connected with described optical transceiver 5 by cable, described optical transceiver 5 is connected with the station switch by cable, interval WAP (wireless access point) 6 is arranged on the rail limit, the signal cover of any two adjacent interval WAP (wireless access point) 6 all has the overlapping region, described vehicle-mounted wireless access point 7 is connected with interval WAP (wireless access point) 6 by wireless network, vehicle-mounted wireless access point 7 is connected with vehicle-mounted switch 2 by network cable, and center switch 4 is connected with described control centre server 1.
Further, the WAP (wireless access point) 6 between the setting area separately on up rail limit and down track limit, the interval WAP (wireless access point) 6 on up rail limit and the interval WAP (wireless access point) 6 on down track limit are connected in two wireless networks.
Further, be connected with workstation computer 8 on the described center switch 4.
Further, any one described interval WAP (wireless access point) 6 all is connected with directional antenna.
Further, be provided with the wireless network monitoring facilities in the described control centre server 1.
As shown in Figure 2, described vehicle-mounted passenger information system includes two chassis and carries Play Server, liquid crystal display terminal, the diode displaying terminal, digital video broadcasting set-top box and look the audio decoder distributor, described digital video broadcasting set-top box and look the audio decoder distributor and be connected to described vehicle-mounted Play Server by cable respectively, described liquid crystal display terminal and diode displaying terminal are connected to by cable respectively and look the audio decoder distributor, described two chassis carry Play Server Hot Spare each other, vehicle-mounted Play Server is respectively by central server 1, station switch signal and vehicle-mounted input device controls, the control authority of station switch signal greater than with the control authority of vehicle-mounted input equipment, the control authority of central server 1 is greater than the control authority of station switch signal.
As shown in Figure 3, described vehicle-mounted broadcast system includes audiogenic device, digital IP main control card, IP network voice frequency terminal, IP paging microphone, power amplifier and loud speaker, described audiogenic device is connected with described power amplifier by voice-frequency cable, described loud speaker is connected with power amplifier, described digital IP main control card is connected with IP paging microphone with the IP network voice frequency terminal, and power amplifier is connected with the IP network voice frequency terminal by voice-frequency cable.
As shown in Figure 4, described vehicle-mounted close-circuit television,closed-circuft televishon includes the vehicle-mounted vidicon of an above number, the Vehicular video encoder of an above number, antidetonation In-vehicle networking video cassette recorder and vehicle-mounted industrial ethernet ring network switch, any one described vehicle-mounted vidicon all is connected with a described Vehicular video encoder separately, any one Vehicular video encoder all is connected with described vehicle-mounted industrial ethernet ring network switch by Shielded Twisted Pair, described antidetonation In-vehicle networking video cassette recorder is connected with vehicle-mounted industrial ethernet ring network switch, and vehicle-mounted industrial ethernet ring network switch is connected with described vehicle-mounted switch 2 by network cable.
In an embodiment of the present invention, the IP network that relates to has comprised cable network and wireless network.Cable network is made up of vehicle-mounted switch 2, netting twine etc., be used to carry PIS system (vehicle-mounted passenger information system between train two ends drivers' cab and the railway car, hereinafter to be referred as the PIS system), PA system (vehicle-mounted broadcast system, hereinafter to be referred as the PA system) and the transfer of data of CCTV system (vehicle-mounted close-circuit television,closed-circuft televishon, C TV system); Wireless network is by station switch, fiber optical transceiver, interval AP (WAP (wireless access point), hereinafter to be referred as AP), antenna and vehicle-mounted AP (including but not limited to) etc. composition, be used for real time data (the issuing of train travel information, live video stream between train and control centre, the station; Uploading etc. of vehicle-mounted CCTV video flowing) mutual.
Vehicle-mounted PIS system adopts the high definition display terminal of large-screen, for example LCD, LED and PDP (including but not limited to), show and the information of all kinds of hommizations improve the efficient that the passenger receives information, ensure rail transportation operation safety, make things convenient for the passenger to go on a journey simultaneously.Typically, on the vehicle of subway high-speed cruising, the PIS system will be provided with the Customer information display screen of some, allow the passenger pass through running status and safety event that display screen is in time understood train, in train operation, can play contents such as arriving at a station, jump station, safety instruction, weather forecast, current events, news, music simultaneously.Vehicle-mounted PIS system will with vehicle-mounted CCTV system interlink, in case find improper situations such as fire, obstruction and the attack of terrorism on monitoring image, the broadcast of normal program will be interrupted in the PIS system, provide dynamic emergency evacuation prompting at each display terminal.
Vehicle-mounted PA system adopts the digital network scheme, every joint compartment be provided with power amplifier, loud speaker and urgency traffic microphone (including but not limited to), multiple broadcast forms such as train two ends drivers' cab respectively is provided with control desk and broadcast system control card, provides manually and propagandas directed to communicate, and MP3, CD and broadcasting are tuning.Vehicle-mounted PA system is used to play the information of arriving at a station of train, information leaving from station, advertising message and background music, and in case of emergency be used to play evacuation information.The driver can carry out full car broadcasting and also can select certain joint compartment to propaganda directed to communicate separately.When the situation is critical, but also press-to-talk button of passenger is directly conversed with the driver.Vehicle-mounted PA system can adopt recorded broadcast and live broadcast mode.
Vehicle-mounted CCTV system adopts the digital network monitoring scheme, and every joint compartment is provided with 2-4 platform video camera, and train two ends drivers' cab respectively is provided with 1 video camera, is converted to digital video signal by digital encoder; By built-in hard disk in encoder device, can directly carry out front end video recording simultaneously to the video camera in this compartment; Arrange the network video machine at drivers' cab, all camera video streams of full car are recorded a video.On the LCD in drivers' cab (be LCD Broadcast Control computer, switch), can carry out real-time calling to whole video cameras and video recording by KVM.Can see monitoring image clearly, the monitoring in the compartment does not have the dead band, and is not subjected to the influence of the block vision of handrail in the compartment, column substantially.As find emergency, can pacify passenger's mood immediately by PIS and PA notifications passenger.Vehicle-mounted CCTV video flowing will be by vehicle-mounted AP transmission control system center on the ground in real time or quasi real time.
Integrative solution of the present invention has fully been integrated the technology in fields such as IP network, video, audio frequency, storage and signaling, with permeate integral body of PIS system, PA system and CCTV system, adopt open framework, standard techniques realizes, system introduces vehicle integrated information system with signaling control with the advanced theory that the Media Stream exchange separates, and makes the vehicle integrated information system of ring howl company have favorable expandability, convenient management, upgrading characteristic of simple.
The present invention is a core communication network with vehicle-mounted IP network, vehicle-mounted PIS system, vehicle-mounted PA system and vehicle-mounted CCTV system by AP between station and tunnel, realize the data interaction between train operator chamber and railway car, train and station (control centre) all by unified IP platform construction.
The present invention is by IP network, vehicle-mounted PIS system, vehicle-mounted PA system and vehicle-mounted CCTV system form, and capital equipment is including but not limited to Play Server, technical grade switch, vehicle-mounted AP, video encoder, camera, DVB-T set-top box, MIC, LCD, LED etc.
Utilize IP network, technical scheme of the present invention can realize vehicle-mounted PIS, vehicle-mounted PA, vehicle-mounted CCTV integrated management, monitoring is expanded to vehicle interior, and passenger safety in the support vehicles driving process and device security give the multimedia enjoyment that the passenger looks audio frequency simultaneously.
Among the present invention, the train-ground communication of PIS system mainly by WLAN and DVB-T (including but not limited to) mode carry out.
IP network in the embodiment of the invention is selected the third generation wlan network framework of centralized thin AP architecture for use, car ground mobile broadband transmission system capital equipment includes but not limited to by the wireless exchange board that is arranged on control centre, is laid on the other wireless access point device (AP contains directional antenna) of rail, the radio reception device formations such as (containing antenna) in the train.
IP network mainly by wireless exchange board, center switch 4, station switch, optical transceiver 5, be laid on wireless base station device (AP contains directional antenna) in tunnel and the rolling stock section, in the train radio reception device (containing antenna) (including but not limited to) etc. formation.
Present embodiment adopts wireless exchange board, wireless aps and wireless bridge to make up WLAN (wireless local area network), meets WLAN 802.11a/b/g standard.Wireless system hardware has two parts, and AP and wireless network switch, AP are not need with wireless network switch direct-connectedly, are to see through Ethernet switch (no matter be two layers or three layers), router or other network equipment intercommunication between them.When AP be inserted on the network start after, AP can set up being connected of gre tunneling with wireless network switch automatically, all returns the gre tunneling of understanding through AP from data that wireless terminal is issued to afterwards and pass to wireless network switch.Same when the data beard and hair is delivered on the wireless terminal, then must pass through the GRE data tunnel that wireless network switch and AP set up earlier, and then send to wireless terminal through AP.
Connection and implementation between each equipment are as follows:
1) wireless exchange board is connected to center switch 4 by optical fiber with the bandwidth of 1000Mbps, and the radio management work station connects center switch 4 by 5 class lines with the bandwidth of 100Mbps;
2) station switch, rolling stock section's switch are connected to center switch 4 by optical cable with the bandwidth of 1000Mbps;
3) wireless base station device that is laid in tunnel and the rolling stock section is connected to optical transceiver 5 by 5 class lines, optical transceiver 5 connects the station under the wireless base station or the optical transceiver 5 of rolling stock section by optical cable with the bandwidth of 100Mbps, is connected to station switch or rolling stock section switch by 5 class lines with the bandwidth of 100Mbps by the latter again;
4) wireless base station is laid in uplink and downlink separately in the tunnel, promptly in the wireless base station in the uplink tunnel and the downlink tunnel the wireless base station constitute different wireless networks;
5) according to the performance of mobile broadband transmission network base station and antenna, and on-the-spot situation reasonably selects the position of AP, can be in seamless covering completely with the signal strength that guarantees the mobile broadband transmission network.Also consider simultaneously how to avoid influence to other system of subway.
6) mobile broadband transmission network system has fully taken into account the switching problem of train under high-speed case, and adopt an effective measure and reduce switching time and reduce the data degradation of bringing because of switching, do not interrupt (being less than 50ms switching time) with assurance real-time broadcast onboard, and play quality is unaffected.Can carry out stably for the switching of protecting positive system in addition, the switched wireless function that is located at control centre is managed the AP more than 2000 simultaneously, its objective is when train moves on a line, the switching of wireless exchange board can not occur striding.The back can describe that different mobile units switch at the circuit between the different AP, route is switched in detail and different frequency between the concrete steps switched and the break period that may cause;
The effective bandwidth of the mobile broadband transmission network that 7) provides reaches as high as 25Mbps, on average can reach 15Mbps, and wireless bandwidth possesses the QOS grading control.Institute's blit the phenomenon that picture interrupts or jumping is broadcast can not occur as smooth and easy clear; Image compression encoding can be MPEG-2 or MPEG-4, and H.264 (bandwidth is 2～10Mbps) to form;
8) when arranging AP, fully taken into account the reliability of system, the coverage of each AP has all guaranteed the overlay region, and when AP and miscellaneous equipment broke down individually, system still can operate as normal.The power output of each AP satisfies the national regulation requirement, and the power output of each AP is not more than 100mW, does not use high-gain aerial, and according to the AP of distance configuration every 150 meters;
9) air interface of mobile broadband transmission network system, frequency point ranges and encryption measures satisfy relative national standards and regulation;
10) equipment of mobile broadband transmission network in the tunnel satisfies the requirement of tunnel clearance and others, and equipment itself also reaches the standard of IP65, to adapt to the environmental condition in the tunnel;
11) there is perfect Network Management Equipment in system, can monitor the working condition of each equipment of native system at any time in control centre.
12) in order to guarantee system data safety, taked corresponding safety measure.
13) the wireless network monitoring of software is installed.Monitor access point on one's own initiative, and the fault and the performance that are connected to the switch of access point; The malice access point that detects rapidly,, locatees and forbid unwarranted unwitting employee easily or place by (malice) outside invading person; Disturb by detection and location RF, and monitor operating position and fault on one's own initiative, optimize the performance of network.
14) directional antenna is installed, is limited coverage.
15) system has strong antijamming capability, can guarantee reliably working under various complex environments, simultaneously, other system (as signal system etc.) is not impacted when normal the use.The back meeting employed equipment of labor and system's anti-jamming capacity, and relevant treatment measures.
Vehicle-mounted PIS equipment including but not limited to: vehicle-mounted Play Server, LCD display terminal, LED display terminal, DVB-T set-top box, look audio decoder distributor, all kinds of cable annex, integrated software module etc.Control mode adopts the many modes of a control, and promptly a plurality of LCD (LED) screen all receives the control of vehicle-mounted Play Server.For guaranteeing the reliable and stable of system, the vehicle-mounted Play Server of a cover is respectively installed in train head and the tail zone, and two-server Hot Spare each other.
The same with station PIS system, vehicle-mounted PIS system adopts three grades of control modes, and promptly vehicle-mounted PIS system is subjected to COCC, OCC and vehicle-mounted local control.Carry out the principle of " the prime authority is higher than the back level " in the information issue, promptly OCC can monitor, corrects and cover station and vehicle-mounted information releasing, and COCC can monitor, corrects and cover the OCC information releasing.The Play Server of vehicle-mounted PIS is the control point of vehicle-mounted PIS system.COCC and OCC control the behavior of vehicle-mounted PIS system all devices and monitor its state to the Play Server of vehicle-mounted PIS by sending controling instruction and control data.COCC and OCCPIS system and vehicle-mounted PIS system communication realize by the wireless portion of IP network.
Under the live-mode of center, the control command of COCC or OCC is got on the bus through ground by wireless network, directly controls the demonstration and the behavior of various PIS equipment.Under live-mode on the spot, the DVB-T digital television signal that the zone covers enters Play Server through set-top box and handles, be transferred to the local area network (LAN) of train inside behind the coding, every joint compartment all is furnished with 1 decoding distributor, shows on the LCD display of decoded signal in terminal.Can't foundation and during the communicating to connect of COCC or OCC PIS, the PIS system changes degraded mode over to, changes the recorded broadcast mode automatically over to, plays local prefabricated media content in vehicle-mounted PIS system.
Vehicle-mounted PIS subsystem obtains real-time media stream and other control information by the wireless local net mode from wireless coverage network between Close Tunnel.Under the effect of Play Server, various information and Media Stream are incorporated into by MediaCast split screen broadcast system on the LCD screen in each compartment and show.Detecting when disconnecting with communicating by letter of station, MediaCast automatically switches to and plays local media information resource.
Vehicle-mounted PIS system can accept ATS, and the instruction of systems such as TMS, PA, CCTV with its interlock, shows the operation situation of current circuit on screen, comprises that train position, marshalling, institute arrive at a station, fault message, the information etc. of calling out the stops.Each equipment of vehicle-mounted PIS system all possesses self detecting function, can obtain the state and the fault alarm information of all vehicle-mounted PIS subsystem equipment by inquiry.These information are by being sent to COCC through WLAN (wireless local area network), OCC and standby OCC.
COCC and OCC are by the car-ground radio system, and at LCD, real-time broadcast is runed emergence message, runed information on services, commerce services information and other required graph text information LED screen on, in addition, can the controls playing server revise the content of terminal display screen arbitrarily; Support directly to receive DVB-T real-time media stream signal simultaneously, after the information of sending with COCC or OCC is synthetic, play according to the format that had both defined, video information adopts the MPEG-2 volume to separate standard.The LED screen all is housed inside and outside the compartment.LED is loaded on the front portion, compartment in the compartment, can show running information and present position in real time.The LED screen is loaded on the car door top outside the compartment, shows arrive at a station information and signal language.
By the interface that vehicle-mounted Play Server provides, COCC and 0CC can be in real time intercut Word message to the display terminal of vehicle-mounted PIS; Vehicle-mounted PIS supports the repeat playing information instruction, automatically performs and repeat playing.
Before the operation beginning, the work of when vehicle powers on, spreading its tail automatically of vehicle-mounted PIS system, and can carry out corresponding information change according to the timetable adjustment; Because the supply of electric power of onboard system is limited, in the case of necessary, onboard system need switch the power supply of some equipment, and the direct power-down mode of vehicle-mounted PIS system support unit this moment shuts down and do not cause any hardware damage.When next vehicle powers on, restart work.
Vehicle-mounted PA broadcast system adopts digital technology and IP network technology, and audio signal is transmitted on the train local area network (LAN) with the IP data packet form, is the two way audio sound reinforcement system of a cover pure digi-tal transmission.
This system principle is: the audio signal of broadcasting is carried out digital coding in playing controller, and send on the network with the IP broadcast packet form, by broadcast terminal the decoding of IP broadcast bag is reduced to audio signal at the network arbitrary end.But only be tens of milliseconds time of delay in multichannel, the transmitted in both directions, local area network (LAN), and have automatic flow adjustment, sound mending function.Conformance with standard IP agreement also can realize audio transmission through router, is one of audio transmission techniques of current industry main flow.
This system by capital equipment including but not limited to formations such as audiogenic device (CD player, FM digital tuner, microphone etc.), digital IP main control card (being installed on Play Server), IP network voice frequency terminal, IP paging microphone, power amplifier and Ceiling loudspeaker housings.
The broadcasting for train master-control room is located at driver's cabin, for setting up subregion in each compartment.Only need set up the interior voice band line, the PA signal adopts Digital Transmission between the compartment, makes full use of train internal lan resource, exempts from wiring fully, realizes the sectorization broadcast function.
Its superiority is embodied in following several respects:
Function aspects: can independently control the different content of each terminal plays.Not only realize the function of conventional broadcast system fully, but also possess functions such as free terminal program request, the two-way intercommunication of terminal room;
The transmission aspect: the audio transmission distance is infinitely extended, and may operate on the Local Area Network and wide area network (WAN) of inter-network pass, supports large-scale important type to use, and realizes the broadcasting in unison between each subregion, realizes quick, information communication reliably;
The tonequality aspect: (44.1K 16bit), embodies more real voice reduction effect, and each pronunciation is all clear and legible, has thoroughly broken away from simulated audio signal in the conventional broadcast system and has been subject to the worry disturbing, crosstalk near the CD level for terminal output tonequality;
Reliability aspect: adopt embedded OS, guarantee the normal operation of system core function, not invaded and harassed by internet worm.Terminal adopts the technical grade chip, guarantees 24 hours operate as normal of whole day.
Digital broadcasting is fit to multizone audio distribution, point-to-point audio transmission.Can be by existing ethernet network, lower than analog broadcast system installation cost, dispose and set up simpler.The tonequality that thoroughly solves the conventional broadcast system existence is not good, and transmission range is limited, lacks problems such as interaction.This system equipment is easy to use, only needs that terminal is inserted computer network and can constitute powerful digit broadcasting system, and each access point need not independent wiring, realizes many net unifications of computer network, digital video monitoring, public broadcasting.
Vehicle-mounted PIS and vehicle-mounted PA have control and audio interface.Vehicle-mounted PIS can insert vehicle-mounted PA with the audio output signal that medium broadcast, and is the PIS sound accompaniment by vehicle-mounted broadcast system sounding.Vehicle-mounted broadcast host is in broadcasting for train, and the may command Vehicle Controller reduces the generation volume or becomes the tone-off state, and the sound of media program is not conflicted with broadcast system.
Vehicle-mounted CCTV system monitoring adopts IP-based digital video monitor system, forms including but not limited to equipment such as vehicle-mounted vidicon, Vehicular video encoder (MPEG4 Wavelet), antidetonation In-vehicle networking video cassette recorder (NVR), vehicle-mounted access switch, vehicle-mounted industrial ethernet ring network switch, KVM switchs.
Adopt the solution of NVR in the present embodiment, transmit the vision signal of digital network with the twisted-pair feeder of shielding.Twisted-pair feeder is the transmission medium of bidirectional bus formula, the wire casing that has greatly reduced vehicle-mounted CCTV takies, also can directly utilize the existing twisted-pair feeder that has surplus to reserve, reduced the quantity of cable, by at PIS, carry out rational allocated bandwidth between three systems of CCTV and PA, can greatly promote the stability of vehicle-mounted all subsystems and the workload of reliability and wiring.
Concrete, 2 (or increasing to 4) floor-mounted cameras are installed in every joint compartment of vehicle are formed correlation, guarantee the no dead angle of monitoring; The headstock tailstock is respectively installed 1 fixed cameras, 18 fixed cameras are installed altogether, every corresponding MPEG4Wavelet video encoder of video camera, twisted-pair feeder by shielding is connected with video encoder, and all camera video information all inserts the train local area network (LAN) through encoder encodes compression back.
Each encoder by himself independently Ethernet interface be connected one by one with 100/1000M ethernet port on the vehicle-mounted Industrial Ethernet switch.Incorporate MPEG4 Wavelet video encoder possesses small size, low-power consumption and extremely strong shockproof properties; After entering the annular LAN of forming by the technical grade Ethernet switch (this network links to each other with the onboard wireless network), transmit to being installed in track wireless network along the line with wireless mode.The stack of the vehicle number of video camera, installation site and real-time time character is finished by video encoder.The buy car in installments video cassette recorder of the head and the tailstock of the digital video frequency flow that the Vehicular video encoder can send the about 1.5Mbps～2Mbps of multichannel is simultaneously recorded a video simultaneously.
An Industrial Ethernet switch is set in every joint compartment, and each switch possesses the function that can form looped network simultaneously by electric port and optical port.The Industrial Ethernet switch possesses self-healing function fast, and the self-healing time of each node, the whole self-healing time of optical fiber ring network was less than 50 milliseconds less than 4 milliseconds.
At the vehicle-mounted network video machine of 1 cover of respectively installing end to end in compartment, this two complete equipment is with redundant fashion work, and the In-vehicle networking video cassette recorder possesses the adaptive ethernet port of 100/1000Mbps, is used for being connected with vehicle-mounted ethernet ring network.Antidetonation In-vehicle networking video cassette recorder possesses management, setting, monitoring and the warning function of Vehicular video codec and video recording itself.The In-vehicle networking video cassette recorder adopts aluminium alloy to reinforce hard disk as storage medium, and this storage medium capacity is big, adopts pack alloy sealing elastomer compound adhesive vibration-proof structure, possesses extremely strong shockproof properties.
In addition, the video camera that is installed in train two ends drivers' cab has the audio frequency input function, and the driver sneaks into the CCTV video image by microphone audio, is transferred to OCC, can monitor the scene better like this.Vehicle-mounted real-time monitor video and In-vehicle networking video recording all can be retrieved for examination by the monitored center of wireless network.By the digital video decoder of OCC configuration, all vehicle-mounted MPEG4 digital videos will be transferred to Analog Composite Video and be flow to monitoring large-size screen monitors into OCC, for the usefulness of dispatcher's monitoring.
Vehicle-mounted KVM switch is used to switch the picture of the network video machine of Play Server and CCTV, makes things convenient for the train dispatcher to use.Simultaneously, the KVM switch is supported USB and OSD, and controlling by the touch of touch-screen is changeable input source.
In addition, vehicle-mounted CCTV system also has following self-checking function:
Detect the correct validity of vision signal;
Whether inspection vehicle ground transmission link is unobstructed;
Voltage standing wave ratio (VSWR) test.
These self-checking functions automatically perform in " launch train " initialization procedure of each vehicle.Also can manually carry out these test functions.
When following situation occurring, system will send warning message (sending by the video server and the webmaster maintenance work station of car-ground radio net to OCC):
Single camera is lost image;
Power down;
Memory space inadequate;
Any one work package fault.
Claims (8)
1. vehicle integrated information system based on the IP platform, comprise control centre's server, vehicle-carrying communication network and train-ground communication network, it is characterized in that: include vehicle-mounted switch in the described vehicle-carrying communication network, network cable, vehicle-mounted passenger information system, vehicle-mounted broadcast system and vehicle-mounted close-circuit television,closed-circuft televishon, described vehicle-mounted passenger information system, vehicle-mounted broadcast system is connected with described vehicle-mounted switch by network cable respectively with vehicle-mounted close-circuit television,closed-circuft televishon, include wireless exchange board in the described train-ground communication network, center switch, the station switch, optical transceiver, the interval WAP (wireless access point) and the vehicle-mounted wireless access point of an above number, described wireless exchange board is connected with described center switch by optical fiber, described station switch is connected with center switch by optical fiber, any one described interval WAP (wireless access point) all is connected with described optical transceiver by cable, described optical transceiver is connected with the station switch by cable, interval WAP (wireless access point) is arranged on the rail limit, the signal cover of any two adjacent interval WAP (wireless access point) all has the overlapping region, described vehicle-mounted wireless access point is connected with interval WAP (wireless access point) by wireless network, vehicle-mounted wireless access point is connected with vehicle-mounted switch by network cable, and center switch is connected with described control centre server.
2. the vehicle integrated information system based on the IP platform as claimed in claim 1, it is characterized in that: the WAP (wireless access point) between the setting area separately on up rail limit and down track limit, the interval WAP (wireless access point) on up rail limit and the interval WAP (wireless access point) on down track limit are connected in two wireless networks.
3. the vehicle integrated information system based on the IP platform as claimed in claim 1 is characterized in that: be connected with workstation computer on the described center switch.
4. the vehicle integrated information system based on the IP platform as claimed in claim 1 is characterized in that: any one described interval WAP (wireless access point) all is connected with directional antenna.
5. the vehicle integrated information system based on the IP platform as claimed in claim 1 is characterized in that: be provided with the wireless network monitoring facilities in the described control centre server.
6. the vehicle integrated information system based on the IP platform as claimed in claim 1, it is characterized in that: described vehicle-mounted passenger information system includes two chassis and carries Play Server, liquid crystal display terminal, the diode displaying terminal, digital video broadcasting set-top box and look the audio decoder distributor, described digital video broadcasting set-top box and look the audio decoder distributor and be connected to described vehicle-mounted Play Server by cable respectively, described liquid crystal display terminal and diode displaying terminal are connected to by cable respectively and look the audio decoder distributor, described two chassis carry Play Server Hot Spare each other, vehicle-mounted Play Server is respectively by central server, station switch signal and vehicle-mounted input device controls, the control authority of station switch signal greater than with the control authority of vehicle-mounted input equipment, the control authority of central server is greater than the control authority of station switch signal.
7. the vehicle integrated information system based on the IP platform as claimed in claim 1, it is characterized in that: described vehicle-mounted broadcast system includes audiogenic device, digital IP main control card, IP network voice frequency terminal, IP paging microphone, power amplifier and loud speaker, described audiogenic device is connected with described power amplifier by voice-frequency cable, described loud speaker is connected with power amplifier, described digital IP main control card is connected with IP paging microphone with the IP network voice frequency terminal, and power amplifier is connected with the IP network voice frequency terminal by voice-frequency cable.
8. the vehicle integrated information system based on the IP platform as claimed in claim 1, it is characterized in that: described vehicle-mounted close-circuit television,closed-circuft televishon includes the vehicle-mounted vidicon of an above number, the Vehicular video encoder of an above number, antidetonation In-vehicle networking video cassette recorder and vehicle-mounted industrial ethernet ring network switch, any one described vehicle-mounted vidicon all is connected with a described Vehicular video encoder separately, any one Vehicular video encoder all is connected with described vehicle-mounted industrial ethernet ring network switch by Shielded Twisted Pair, described antidetonation In-vehicle networking video cassette recorder is connected with vehicle-mounted industrial ethernet ring network switch, and vehicle-mounted industrial ethernet ring network switch is connected with described vehicle-mounted switch by network cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810202707A CN101741493A (en) | 2008-11-13 | 2008-11-13 | IP platform-based on-vehicle integrated information system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810202707A CN101741493A (en) | 2008-11-13 | 2008-11-13 | IP platform-based on-vehicle integrated information system |
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| CN101741493A true CN101741493A (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810202707A Pending CN101741493A (en) | 2008-11-13 | 2008-11-13 | IP platform-based on-vehicle integrated information system |
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| CN113225375B (en) * | 2021-03-29 | 2022-01-21 | 北京城建智控科技股份有限公司 | Distributed central station integrated urban rail cloud architecture system |
| CN113709851A (en) * | 2021-08-31 | 2021-11-26 | 郑州铁路职业技术学院 | Rail transit wireless communication method and system |
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Application publication date: 20100616 |