CN101574978A - Straddle type monorail transportation vehicle movable real-time video monitoring system - Google Patents
Straddle type monorail transportation vehicle movable real-time video monitoring system Download PDFInfo
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- CN101574978A CN101574978A CNA2009101038518A CN200910103851A CN101574978A CN 101574978 A CN101574978 A CN 101574978A CN A2009101038518 A CNA2009101038518 A CN A2009101038518A CN 200910103851 A CN200910103851 A CN 200910103851A CN 101574978 A CN101574978 A CN 101574978A
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Abstract
The invention discloses a straddle type monorail transportation vehicle movable real-time video monitoring system, which relates to the technology of wireless communication and transmission. An output BNC interface of a camera (301) is connected with an input BNC interface of a video coder (302); an RJ45 Ethernet interface of the video coder (302) is connected with one RJ45 Ethernet interface of an Ethernet switch (303); the RJ45 Ethernet interfaces of the Ethernet switch (303) are respectively connected with the RJ45 Ethernet interfaces of a data processing server (304), a video memory server (305), a monitoring client (306), a wireless transmitting equipment (309), wireless receiving equipment A (307), and wireless receiving equipment B (308); the RJ45 Ethernet interfaces of base station wireless transmitting equipment (201) and base station wireless receiving equipment (202) are respectively connected with the RJ4 Ethernet transmitting interface and the RJ4 Ethernet receiving interface of a central Ethernet switch (103); and the RJ45 Ethernet interfaces of a central data processing server (101), a central video transmitting server (102) and a central monitoring client (104) are respectively connected with the RJ45 Ethernet interface of the Ethernet switch (103). The straddle type monorail transportation vehicle movable real-time video monitoring system has the advantages of stable and high bit rate channel bandwidth, no effects of the vehicle speed on the bandwidth, high video image quality, large single-base station covering and low cost.
Description
Technical field
The present invention relates to the radiocommunication transmission technology, under especially a kind of Straddle type monorail transportation vehicle train mobile status, carry out the system of video monitoring in real time.
Background technology
In order to strengthen track traffic security precautions technology means, video information in the high-speed cruising train car need be sent to monitoring and control centre in real time.The radio transmitting method of realizing real-time video information in the running train has following several usually:
A kind ofly be based on the public mobile communication net, or utilize that special-purpose cordless communication network comes the transmission digital video signal in the track traffic communication system.These methods all be utilize existing public, or private radio communication network, though reduced cost, because the restriction of wireless communication bandwidth, the transmission bandwidth of one road video image can only reach about tens Kbps, has a strong impact on video image quality.
Another is to utilize WLAN (being called for short WLAN) technology, transmission real-time digital video signal.The advantage of WLAN technology is: sufficient bandwidth can be provided, maximum can reach 54Mbps, and still this high bandwidth only is applicable under train steady state or the low speed mobile status, along with the quick increase of train moving velocity, wireless bandwidth will descend rapidly, below 1Mbps.In the WLAN technology,, easily cause radio communication to be interrupted in addition, can produce digital video signal frame losing phenomenon, reduced the transmission quality of video image because mobile station is longer switching time between different radio access node AP.
Summary of the invention
The objective of the invention is to overcome the deficiency and the shortcoming that exist in the existing technologies, a kind of high bandwidth that not influenced by moving velocity, the stay-in-grade movable real-time video monitoring system of transmission of video images are provided.The present invention utilizes public mobile communication network or track traffic private radio communication network relatively, carry out digital signal transmission and significantly improved the transmission over radio bandwidth, then realize stable high bandwidth wireless signal transmission with respect to being beneficial to the WLAN technology, and improved video image quality.
Form video data stream after the objective of the invention is to utilize the analogue video signal process video encoding compression on the train, this video data stream is carried out the wireless radiofrequency emission by the onboard wireless transmitter; Lay base station equipment along the line at track, base station equipment links to each other with the center Ethernet switch of monitoring and control centre by the wire transmission network, the base station is reduced to video data stream with the radiofrequency signal that receives, and is sent to the centre data processing server by the wire transmission network and carries out data and select to handle; Data after the centre data processing server will be handled are sent to the centre data forwarding server by cable LAN carries out video data stream and is forwarded to the center monitoring client, and the center monitoring client shows real time video image by video decode.
Technical scheme that purpose of the present invention adopts is, comprise onboard subsystem, base station sub-system and monitoring sub, onboard subsystem comprises pick up camera, video encoder, data processing server, video storage server, monitor client, have the wireless transmitting device of antenna, have the radio receiver A of antenna and have radio receiver B, the Ethernet switch of antenna; Base station sub-system comprises at least more than one base station, and each base station comprises the base station radio transmitter of being with antenna, base station radio reception facilities, the wire transmission network of band antenna; Monitoring sub comprises the center Ethernet switch, the centre data processing server, center video forwarding server, the center monitoring client, the camera video output bnc interface of its described onboard subsystem links to each other with video encoder video input bnc interface by video cables, video encoder RJ45 Ethernet interface is connected the data processing server of Ethernet switch by netting twine with a RJ45 Ethernet interface of Ethernet switch, the video storage server, monitor client, the antenna transmitter, antenna receiving apparatus A, the RJ45 Ethernet interface of antenna receiving apparatus B by netting twine respectively with data processing server, the video storage server, monitor client, wireless transmitting device, radio receiver A, radio receiver B RJ45 Ethernet interface separately connects; The base station radio transmitter of base station sub-system, the RJ45 Ethernet interface of base station radio reception facilities are connected with the emission of RJ45 ethernet, the receiving interface of the center Ethernet switch of monitoring sub respectively by ground wire transmission network; The RJ45 Ethernet interface of the centre data processing server of monitoring sub, center video forwarding server, center monitoring client is connected with the Ethernet interface of the data processing server of the RJ45 of center Ethernet switch, video forwarding server, monitor client respectively by netting twine.
Onboard subsystem radical function of the present invention is collection, digital coding, car stored, the monitoring display of finishing video information, and vision signal is sent to the base station radio reception facilities by wireless transmitting device, to receive the video control command information that monitoring sub are sent by two cover radio receivers simultaneously, finish functions such as parameter setting to the onboard subsystem relevant device, function control.
The base station radio reception facilities receives the vision signal that train-installed subsystem transmits in the base station sub-system of the present invention, and vision signal passed back to monitoring sub by the wire transmission network, the video control command information that simultaneously monitoring and control centre is sent is sent to each train-installed subsystem by the base station radio transmitter.
The centre data processing server of monitoring sub of the present invention carries out data screening with the video information that receives to be handled, and the data after will handling are sent to center video forwarding server by local area network and carry out video data stream and be forwarded to the center monitoring client, the center monitoring client shows real time video image by video decode, simultaneously the monitor staff can be according to authority and function setting under separately, show in real time, switch, retrieval, video information on the corresponding train car of playback storage, issue the video control command information to onboard subsystem, this information is issued to the base station radio transmitter by the wire transmission network.
The present invention adopts the wireless transmission of COFDM modulation system, reception facilities that the video data stream and the monitoring and control centre data flow of onboard subsystem are modulated, (80km/h) can provide stable wireless signal-path band width (greater than 13Mbps) under the train high-speed moving state, and can eliminate the influence of flatness decline and Doppler frequency shift, strengthened the anti-multipath interference performance simultaneously.
Monitoring sub centre data processing server carries out data handing to the video data stream from same emissive source that send a plurality of base stations.Track lays a plurality of base stations along the line, and when same wireless transmission signal was all received in a plurality of base stations, the base station was sent to monitoring sub centre data processing server with video data stream and carries out the software Screening Treatment, exports complete, continuous video data stream.
Advantage that the present invention had and good effect:
The Radio Transmission Technology based on the COFDM modulation system that the present invention adopts makes the Straddle type monorail transportation vehicle mobile video monitor system possess duplex wireless channel width stable, high code check, and the variation of train speed does not simultaneously have influence to the system wireless bandwidth; Adopt the rake reception technique and be provided with vehicle-mounted, centre data processing server carry out multichannel data Screening Treatment technical guarantee train when moving in different base station equipment overlay area under the high-speed cruising state, each road transmission of video images does not have error code and switches, the clear picture smoothness has obviously improved video image quality in the mobile video monitor system; The effective coverage distance of single base station is big, reduces track base station along the line and sets up quantity, has reduced system cost.
Description of drawings
Further specify the present invention below in conjunction with accompanying drawing.
Accompanying drawing is an embodiment of the invention circuit connection structure scheme drawing.
Among the figure: video forwarding server 103-center, the subsystem 101-of 100-Surveillance center centre data processing server 102-center Ethernet switch 104-center monitoring client 200-base station sub-system 201 base station radio transmitter 202-base station radio receiving equipment 203-wire transmission network 300-onboard subsystem 301-video camera 302-video encoder 303-Ethernet switch 304-data processing server 305-video storage server 306-monitor client 307-radio receiver A 308-radio receiver B 309-wireless transmitting devices
The specific embodiment
As shown in drawings, comprise onboard subsystem 300, base station sub-system 200 and monitoring sub 100, onboard subsystem 300 comprises pick up camera 301, video encoder 302, data processing server 304, video storage server 305, monitor client 306, have the wireless transmitting device 309 of antenna, have the radio receiver A307 of antenna and have radio receiver B308, the Ethernet switch 303 of antenna; Base station sub-system 200 comprises at least more than one base station, and each base station comprises the base station radio transmitter 201 of being with antenna, base station radio reception facilities 202, the wire transmission network 203 of band antenna; Monitoring sub 100 comprises center Ethernet switch 103, centre data processing server 101, center video forwarding server 102, center monitoring client 104, the pick up camera 301 videos output bnc interface of its described onboard subsystem 300 links to each other with video encoder 302 videos input bnc interface by video cables, video encoder 302RJ45 Ethernet interface is connected the data processing server of Ethernet switch 303 by netting twine with a RJ45 Ethernet interface of Ethernet switch 303, the video storage server, monitor client, the antenna transmitter, antenna receiving apparatus A, the RJ45 Ethernet interface of antenna receiving apparatus B by netting twine respectively with data processing server 304, video storage server 305, monitor client 306, wireless transmitting device 309, radio receiver A307, radio receiver B308 RJ45 Ethernet interface separately connects; The base station radio transmitter 201 of base station sub-system 200, the RJ45 Ethernet interface of base station radio reception facilities 202 are connected with the emission of RJ45 ethernet, the receiving interface of the center Ethernet switch 103 of monitoring sub 100 respectively by ground wire transmission network 203; The RJ45 Ethernet interface of the centre data processing server 101 of monitoring sub 100, center video forwarding server 102, center monitoring client 104 is connected with the Ethernet interface of the data processing server of the RJ45 of center Ethernet switch 103, video forwarding server, monitor client respectively by netting twine.
At straddle-type monorail train head, the tailstock onboard wireless reception facilities A307, onboard wireless reception facilities B308 are set respectively.
The analog video signal of video encoder 302 acquisition camera 301, by H.264 or coded system such as MPEG4 form digital video signal, and digital signal is sent to video storage server 305, wireless transmitting device 309 by local area network.
Centre data processing server 101, center video forwarding server 102, center monitoring client 104 all are connected with center Ethernet switch 103 respectively, form a monitoring and control centre local area network.
The video data stream of each base station that monitoring sub 100 centre data processing servers 101 will receive is carried out data screening and is handled, form complete, continuous, active data bag, and data packet is sent to center video forwarding server 102 by the monitoring and control centre local area network, center video forwarding server 102 is forwarded to center monitoring client 104 with the video data stream of receiving, monitors situation in the train in real time for the monitoring staff.
By center monitoring client 104, the monitoring staff can carry out train inner video image picture and show in real time, switch according to authority under separately and function setting, the historical video image information on the train that retrieval, playback are stored.
Claims (1)
1, a kind of Straddle type monorail transportation vehicle movable real-time video monitoring system, comprise onboard subsystem (300), base station sub-system (200) and monitoring sub (100), onboard subsystem (300) comprises pick up camera (301), video encoder (302), data processing server (304), video storage server (305), monitor client (306), have the wireless transmitting device (309) of antenna, have the radio receiver A (307) of antenna and have radio receiver B (308), the Ethernet switch (303) of antenna; Base station sub-system (200) comprises at least more than one base station, and each base station comprises the base station radio transmitter (201) of being with antenna, base station radio reception facilities (202), the wire transmission network (203) of band antenna; Monitoring sub (100) comprises center Ethernet switch (103), centre data processing server (101), center video forwarding server (102), center monitoring client (104), it is characterized in that: pick up camera (301) the video output bnc interface of described onboard subsystem (300) links to each other with video encoder (302) video input bnc interface by video cables, video encoder (302) RJ45 Ethernet interface is connected the data processing server of Ethernet switch (303) by netting twine with a RJ45 Ethernet interface of Ethernet switch (303), the video storage server, monitor client, the antenna transmitter, antenna receiving apparatus A, the RJ45 Ethernet interface of antenna receiving apparatus B by netting twine respectively with data processing server (304), video storage server (305), monitor client (306), wireless transmitting device (309), radio receiver A (307), radio receiver B (308) RJ45 Ethernet interface separately connects; The base station radio transmitter (201) of base station sub-system (200), the RJ45 Ethernet interface of base station radio reception facilities (202) are connected with the emission of RJ45 ethernet, the receiving interface of the center Ethernet switch (103) of monitoring sub (100) respectively by ground wire transmission network (203); The RJ45 Ethernet interface of the centre data processing server (101) of monitoring sub (100), center video forwarding server (102), center monitoring client (104) is connected with the Ethernet interface of the data processing server of the RJ45 of center Ethernet switch (103), video forwarding server, monitor client respectively by netting twine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101038518A CN101574978B (en) | 2009-05-15 | 2009-05-15 | Straddle type monorail transportation vehicle movable real-time video monitoring system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101038518A CN101574978B (en) | 2009-05-15 | 2009-05-15 | Straddle type monorail transportation vehicle movable real-time video monitoring system |
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| CN101574978A true CN101574978A (en) | 2009-11-11 |
| CN101574978B CN101574978B (en) | 2011-02-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514596A (en) * | 2011-12-14 | 2012-06-27 | 武汉烽火信息集成技术有限公司 | Train position monitoring system based on wireless base station and monitoring method thereof |
| CN106330928A (en) * | 2016-08-29 | 2017-01-11 | 上海航盛实业有限公司 | Monitoring information management system |
| CN113650650A (en) * | 2020-05-12 | 2021-11-16 | 株洲中车时代电气股份有限公司 | Freight air rail vehicle remote control system |
-
2009
- 2009-05-15 CN CN2009101038518A patent/CN101574978B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102514596A (en) * | 2011-12-14 | 2012-06-27 | 武汉烽火信息集成技术有限公司 | Train position monitoring system based on wireless base station and monitoring method thereof |
| CN102514596B (en) * | 2011-12-14 | 2014-08-13 | 武汉烽火信息集成技术有限公司 | Train position monitoring system based on wireless base station and monitoring method thereof |
| CN106330928A (en) * | 2016-08-29 | 2017-01-11 | 上海航盛实业有限公司 | Monitoring information management system |
| CN106330928B (en) * | 2016-08-29 | 2019-12-31 | 上海航盛实业有限公司 | Management system for monitoring information |
| CN113650650A (en) * | 2020-05-12 | 2021-11-16 | 株洲中车时代电气股份有限公司 | Freight air rail vehicle remote control system |
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| Publication number | Publication date |
|---|---|
| CN101574978B (en) | 2011-02-09 |
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