CN104079354A - Optical fiber communication system for airship - Google Patents
Optical fiber communication system for airship Download PDFInfo
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- CN104079354A CN104079354A CN201410295077.6A CN201410295077A CN104079354A CN 104079354 A CN104079354 A CN 104079354A CN 201410295077 A CN201410295077 A CN 201410295077A CN 104079354 A CN104079354 A CN 104079354A
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Abstract
The invention discloses an optical fiber communication system for an airship. An optical fiber communication device is arranged in each sub-system of the airship and comprises a light emitting module, a light receiving module, an input interface, an output interface and protocol control module, the protocol control module processes user data of the sub-system according to a configured protocol, and an electrical signal is sent to the light emitting module through the input interface; the electrical signal is modulated into a modulated optical signal by the light emitting module and coupled to an optical fiber; the optical signal is converted into an electrical signal by the light receiving module, the electrical signal is sent to the protocol control module through the output interface; received data packages are analyzed and processed by the protocol control module. An environment control module is used for monitoring the ambient temperature so that the optical fiber communication devices can be located in a stable working environment. The optical fiber communication system can be replaced and extended flexibly and has the advantages of being resistant to electromagnetic interference, good in transmission quality and higher in reliability.
Description
Technical field
The present invention relates to a kind of optical fiber telecommunications system for dirigible, belong to dirigible technical field.
Background technology
Dirigible is a kind of lighter-than-air craft, and its lift-off principle is identical with balloon, but can carry out dynamic navigation and manipulation.Dirigible is a complicated integrated system, generally includes structure, dynamical system, central computer system, remote control telemetering system, the multiple subsystems of landing system and the electric supply system etc. of taking off.Central computer system is responsible for flight control, navigation and the ship business management of dirigible to ensure the flight safety of dirigible, adopts pressure, guarantor's type, temperature, buoyancy control to ensure the Stability Analysis of Structures of dirigible simultaneously.Distance between each subsystem and central computer can be from several meters to hundreds of rice not etc. according to the size of dirigible.
In at present common dirigible design, normal cable or the communication of adopting between the each subsystem of dirigible and central computer (ship borne computer).But employing cable communication, a large amount of cables has increased the load of dirigible.Because the distance between each subsystem and the central computer of huge dirigible is far, the weight of cable will affect the structural design of dirigible, becomes very important factor in dirigible load.And cable communication adopts RS232, CAN and RS485 agreement, its transmission rate is limited, is difficult to support the demand of high-speed applications, as the monitoring of video and transmission.The speed of wire communication is subject to distance affects.For example adopt CAN agreement, when 10 meters of left and right distances, the speed of point-to-point communication can reach 1Mb/s, is reduced to 100k/s when 100 meters of left and right distances, when 300 meters of left and right distances, can only reach 25K/s.If adopt communication (referring to Chinese patent literature CN201584918U), because the speed of Zigbee agreement is low, be only applicable to simple supervision, control information transmission.Secondly, the space electromagnetic environment complexity in high-altitude, radio communication is easily disturbed.In addition, wireless network may be under attack, and wireless signal is easy to be intercepted and captured and eavesdrop.
Along with the development of optical fiber technology, optical fiber communication but has cable communication, the incomparable advantage of radio communication.For example, in the Chinese patent application that application number is 200980104509.8, disclose a kind of for being arranged on the light dissemination system such as the vehicle information system on the passenger-carrying vehicle such as automobile and aircraft.This system due to lightweight, even volume is little and need also only need little power.But this light dissemination system is only applicable in the aircraft of carrying, for the dirigible that works in high-altitude and superaltitude, but there is obvious deficiency.
Summary of the invention
For the deficiencies in the prior art, technical problem to be solved by this invention is to provide a kind of optical fiber telecommunications system for dirigible.
For achieving the above object, the present invention adopts following technical proposals:
For an optical fiber telecommunications system for dirigible, in each subsystem of dirigible, fiber optic communications devices is set respectively, described fiber optic communications devices comprises light emission module, Optical Receivers, input interface, output interface and agreement control module; Wherein,
Described agreement control module is processed the user data of current subsystem according to configuration protocol, and by described input interface, the signal of telecommunication is sent to described light emission module; Described light emission module is modulated into modulated optical signal by the described signal of telecommunication and is coupled to after optical fiber, is sent to other subsystems;
The light signal that described Optical Receivers carrys out other subsystem transmission changes the signal of telecommunication into, is sent to described agreement control module by output interface; Described agreement control module is resolved the packet receiving, and the address of the address information of packet and current subsystem is contrasted, if processing of coupling, otherwise forward or abandon.
Wherein more preferably, in each fiber optic communications devices, also comprise environment control module; Described environment control module comprises temperature collecting cell, control unit, refrigeration unit and heating unit; The data analysis of control unit to temperature collecting cell, and judge whether to start refrigeration unit or heating unit according to pre-configured agreement.
Wherein more preferably, the fiber optic communications devices of described subsystem adopts any one in chain connection, ring-like connection and star-like connected mode.
Wherein more preferably, while adopting chain connected mode, the subsystem in the middle of being arranged in comprises two unjacketed optical fiber communicators, and two unjacketed optical fiber communicators share an agreement control module;
The described agreement control module of transmit leg subsystem sends after the destination address of packet being made as to the address of recipient's subsystem; The subsystem of approach contrasts destination address and local address in described packet, processes, otherwise be forwarded to next son system if identical.
Wherein more preferably, while adopting ring-like connected mode, each subsystem comprises two unjacketed optical fiber communicators, and two unjacketed optical fiber communicators share an agreement control module;
The described agreement control module of transmit leg subsystem sends after the destination address of packet being made as to the address of recipient's subsystem; The subsystem of approach contrasts destination address in packet and local address, processes, otherwise be forwarded to next son system if identical.
Wherein more preferably, while adopting star-like connected mode, N subsystem is connected with central computer subsystem respectively; Described central computer subsystem comprises N unjacketed optical fiber communicator, and described N unjacketed optical fiber communicator shares an agreement control module, and wherein N is positive integer;
The agreement control module of described central computer subsystem, according to the source address field Query Subsystem list in packet, judges whether this subsystem exists;
If exist, packet analyzed: if the destination address of packet is local address, receives packet and process its information field; If the destination address field (DAF) of packet is other subsystems, forward described packet according to the destination address field (DAF) in packet.
Compared with prior art, the present invention has the following advantages:
1. due to the large capacity of Optical Fiber Transmission and high-speed, optical fiber telecommunications system support provided by the invention is up to the transmission rate of 1G, and can flexible expansion to 10G.This makes dirigible can support the application load of two-forty, as real-time video monitoring and transmission etc.
2. the distance between the each subsystem of dirigible can greatly be expanded, and the size of dirigible is no longer limited to the restriction of conventional transmission technology to transmission range.More than distance in the present invention between any two subsystems can reach 1 km, and can expand easily to support farther transmission range.This brings great benefit to building large-scale even huge dirigible.
3. flexible design, extensibility is strong.The present invention can be used for various topological structure, comprises point-to-point, chain, star-like, ring-like and mixed topology etc.
Brief description of the drawings
Fig. 1 is the principle schematic of fiber optic communications devices provided by the present invention;
Fig. 2 is the principle schematic that adopts two-way communication mode between subsystems;
Fig. 3 is the schematic diagram that adopts chain-type topological structure between subsystem;
Fig. 4 is the schematic diagram that adopts ring topology between subsystem;
Fig. 5 is the schematic diagram that adopts stelliform connection topology configuration between subsystem;
Fig. 6 is while adopting stelliform connection topology configuration, the principle schematic of the fiber optic communications devices of central computer.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Referring to Fig. 1 and Fig. 2, dirigible optical fiber telecommunications system provided by the present invention adopts optical fiber as transmission medium.In each subsystem, dispose fiber optic communications devices, comprise light emission module, Optical Receivers, agreement control module, input interface, output interface and environment control module.Wherein agreement control module is connected with input interface and output interface respectively.Input interface is connected with Optical Receivers, for the image data of reception is sent to other subsystems.Output interface is connected with optical transmission module, the control or the order that send for receiving other subsystems.
The subsystems of dirigible transmits the data messages such as collection, control, order, state and video conventionally.The present invention is referred to as user data.Agreement control module is the control core of fiber optic communications devices, according to pre-configured agreement, packet is encapsulated and decapsulation.Subsystems is according to the flow direction of address information specified data in configuration protocol.By this agreement control module, make this communication system support various topological structures, as point-to-point, star-like, chain and ring-like.Input interface is the port that receives the agreement control module signal of telecommunication, for the signal of telecommunication of the user data of agreement control module reception is sent to light emission module.Light emission module is used for realizing the conversion of electricity/light, comprises light source, driver and modulator.The light wave that light emission module sends the signal of telecommunication of input interface transmission and light source is modulated into modulated optical signal in modulator, the light signal that carries user profile is coupled to optical fiber or optical cable goes to transmit by the driving of driver.Optical Receivers is used for realizing the conversion of light/electricity, comprises photodetector and image intensifer.Optical Receivers, by optical fiber or the next light signal of optical cable transmission, changes the signal of telecommunication into through photodetector, and the faint signal of telecommunication is amplified to enough level through the effect of image intensifer, is sent in output interface.Output interface is sent to the signal of telecommunication of Optical Receivers conversion in agreement control module.Agreement control module to receive the signal of telecommunication resolve, according to resolve destination address determine whether by the local address of current subsystem consistent, if unanimously, processes transmission user data; Otherwise forward or abandon.Because the fiber optic communications devices of each subsystem needs to receive and send data, when realizing subsystem or communication node two-way communication, between fiber optic communications devices, need two Optical Fiber Transmission paths (referring to Fig. 2).Can certainly adopt wavelength-division multiplex technique, simple optical fiber is realized two-way communication.The present invention adopts optical fiber as transmission medium, and transmission range and transmission rate between dirigible subsystem can be expanded very flexibly.
Dirigible has higher working depth with respect to other aircraft, the highlyest even can reach 50000 meters, and the present the highest flying height of common airline carriers of passengers can not exceed 12600 meters.So the communication equipment on dirigible must be able to adapt to the adverse circumstances in high-altitude, comprises the impact of extremely wide temperature range.Therefore in the present invention, the fiber optic communications devices of each node (or subsystem) also needs to configure independent environment control module and could meet the work requirements of dirigible.The concentrated of large volume controlled relatively, and temperature acquisition point and control algolithm all need to carry out suitable adjustment.
Environment control module is used for the temperature of the operational environment of adjusting fiber optic communications devices, guarantees that fiber optic communications devices is in stable operational environment, avoids the destruction of low temperature to communication system.Environment control module comprises temperature collecting cell, control unit, refrigeration unit and heating unit.Temperature collecting cell is for harvester operational environment temperature.Control unit is processed temperature collecting cell, and judges whether to start refrigeration unit or heating unit according to pre-configured agreement.Wherein, refrigeration unit is the equipment for fiber optic communications devices is dispelled the heat, normally fan.Heating unit is fiber optic communications devices heat temperature raising under low temperature condition.Refrigeration unit and heating unit are all the control of controlled unit: when temperature is during lower than set point, heating unit starts, and stop after reaching setting range; When temperature is during higher than set point, refrigeration unit is started working.In addition,, for further preventing electromagnetic interference, need to guarantee that communication system has enough electromagnetism airtight by reinforcing cabinet.Therefore by this environment control module, can provide wider temperature regulating power for dirigible.Compared with centralized control, environment control module of the present invention is scattered in each communication node, can accurately reflect the fast response time of local temperature, while information.
Because the particular design of dirigible is different with application demand, the mode of building of optical fiber telecommunications system and topological structure are also different.Optical fiber telecommunications system provided by the present invention can be for various topological structure, as pointtopoint topology, chain topology, star topology and ring topology.For point-to-point topological structure, do not repeating (referring to Fig. 1) here.Introduce in detail chain and stelliform connection topology configuration below.
Referring to Fig. 3, this optical fiber telecommunications system adopts chain-type topological structure.Correspondingly, the fiber optic communications devices in subsystem adopts chain connected mode.Specifically, dirigible comprises some subsystems and a central computer subsystem.Except being positioned at the subsystem of end points, other subsystems join end to end and have formed a logical links.The order of subsystems can be adjusted, and central computer might not be positioned at endpoint location.In this kind of topological structure, for realizing two-way communication, the subsystem mediating needs each 2 of Optical Receivers, optical transmission module, input interface, output interface, 1 of agreement control module.Agreement control module is connected with modules respectively, controls respectively two cover R-T units and adjacent subsystem and communicates.The subsystem that is positioned at end points only need to configure one of Optical Receivers, optical transmission module, input interface, output interface, agreement control module.Adopt the optical fiber telecommunications system of chain-type topological structure in the time carrying out transfer of data, when central computer subsystem sends control information or orders to subsystem N (N is positive integer), its agreement control module is made as the destination address of packet the address of subsystem N, and will after the corresponding processing such as data encapsulate, send to subsystem 1 by optical fibre channel; The agreement control module of subsystem 1 receives data and extracts the destination address of these data, and destination address is contrasted with local address: data are processed if identical with local address, otherwise be forwarded to subsystem 2; Subsystem 2 is identical with the processing procedure of subsystem 1, until data are finally dealt into subsystem N, subsystem N processes these data, and control information or order in executing data.Referring to Fig. 4, the topology between subsystem adopts ring topology.Correspondingly, the fiber optic communications devices in subsystem adopts ring-like connected mode.Be different from chain-type topological structure, between the subsystem of ring topology, join end to end, there is no end points.All subsystems all need 2 unjacketed optical fiber communicators, and its data handling procedure and chain-type topological structure are similar, repeat no more here.
Referring to Fig. 5, this optical fiber telecommunications system adopts stelliform connection topology configuration.Correspondingly, the fiber optic communications devices in subsystem adopts star-like connected mode.In stelliform connection topology configuration, the core that central computer is whole communication network, all subsystems all need to be connected with central computer, and by central computer subsystem and other subsystem communications.As described in Figure 6, central computer needs N unjacketed optical fiber communicator, and N unjacketed optical fiber communicator shares an agreement control module.By the exchanges data of agreement control module control centre's computer subsystem and other subsystems.While adopting stelliform connection topology configuration deal with data, central computer subsystem and subsystem only need in packet, set source address and destination address can complete exchanges data, subsystems, by the address information of packet and local address comparison, determines whether process.While communication between any two subsystems, must be first Packet Generation to central computer subsystem.The agreement control module of central computer subsystem, according to the source address field Query Subsystem list in packet, judges whether this subsystem exists.If exist, central computer subsystem is analyzed packet.If computer subsystem centered by the destination address of packet, central computer subsystem receives packet and processes its information field; If the destination address field (DAF) of packet is other subsystems, whether central computer subsystem is the forwarding that subsystem carries out packet according to the destination address field (DAF) in packet.In stelliform connection topology configuration, while communication between any two points, processing time and time delay are fixed substantially.And in chain topological structure, if the distance of 2 is relatively far away, so due to centre multiple nodes of being separated by, process time delay meeting relatively long.
In sum, the present invention is with respect to communication mode traditional in dirigible, has that transmission rate is high, capacity is larger, makes dirigible can carry more application.Compare cable transmission, optical fiber telecommunications system has little, the lightweight feature of size, when reducing dirigible total weight, is convenient to lay and transport.And with respect to wireless transmission, optical fiber communication is not subject to the impact of electromagnetic interference, have that transmission quality is good, high reliability.The more important thing is, optical fiber communication is all lower than the loss of current any transmission medium, distance between any two subsystems can reach 1 km, and can expand easily to support farther transmission range, make the size of dirigible no longer be limited to the requirement of conventional transmission technology to transmission range, this brings great benefit to building large-scale even huge dirigible.Secondly, optical communication mode can be supported the transmission rate up to 1G, and can flexible expansion higher rate until 10G.This can use the application load that is difficult to the two-forty of supporting on dirigible, as real-time video monitoring and transmission subsystem etc., expands greatly the application of dirigible.
Above the optical fiber telecommunications system for dirigible provided by the present invention is had been described in detail.For one of ordinary skill in the art, any apparent change of under the prerequisite that does not deviate from connotation of the present invention, it being done, all will form infringement of patent right of the present invention, will bear corresponding legal liabilities.
Claims (6)
1. for an optical fiber telecommunications system for dirigible, it is characterized in that, in each subsystem of dirigible, fiber optic communications devices is set respectively, described fiber optic communications devices comprises light emission module, Optical Receivers, input interface, output interface and agreement control module; Wherein,
Described agreement control module is processed the user data of current subsystem according to configuration protocol, and by described input interface, the signal of telecommunication is sent to described light emission module; Described light emission module is modulated into modulated optical signal by the described signal of telecommunication and is coupled to after optical fiber, is sent to other subsystems;
The light signal that described Optical Receivers carrys out other subsystem transmission changes the signal of telecommunication into, is sent to described agreement control module by output interface; Described agreement control module is resolved the packet receiving, and the address of the address information of packet and current subsystem is contrasted, if processing of coupling, otherwise forward or abandon.
2. optical fiber telecommunications system as claimed in claim 1, is characterized in that also comprising in each fiber optic communications devices environment control module; Described environment control module comprises temperature collecting cell, control unit, refrigeration unit and heating unit; The data analysis of described control unit to temperature collecting cell, and judge whether to start refrigeration unit or heating unit according to pre-configured agreement.
3. optical fiber telecommunications system as claimed in claim 1, is characterized in that:
The fiber optic communications devices of described subsystem adopts any one in chain connection, ring-like connection and star-like connected mode.
4. optical fiber telecommunications system as claimed in claim 3, while it is characterized in that adopting chain connected mode, the subsystem in the middle of being arranged in comprises two unjacketed optical fiber communicators, described two unjacketed optical fiber communicators share an agreement control module; Wherein,
The described agreement control module of transmit leg subsystem sends after the destination address of packet being made as to the address of recipient's subsystem; The subsystem of approach contrasts destination address and local address in described packet, processes, otherwise be forwarded to next son system if identical.
5. optical fiber telecommunications system as claimed in claim 3, while it is characterized in that adopting ring-like connected mode, each subsystem comprises two unjacketed optical fiber communicators, two unjacketed optical fiber communicators share an agreement control module;
The described agreement control module of transmit leg subsystem sends after the destination address of packet being made as to the address of recipient's subsystem; The subsystem of approach contrasts destination address in packet and local address, processes, otherwise be forwarded to next son system if identical.
6. optical fiber telecommunications system as claimed in claim 3, while it is characterized in that adopting star-like connected mode, N subsystem is connected with central computer subsystem respectively; Described central computer subsystem comprises N unjacketed optical fiber communicator, and described N unjacketed optical fiber communicator shares an agreement control module, and wherein N is positive integer;
The agreement control module of described central computer subsystem, according to the source address field Query Subsystem list in packet, judges whether this subsystem exists;
If exist, packet analyzed: if the destination address of packet is local address, receives packet and process its information field; If the destination address field (DAF) of packet is other subsystems, forward described packet according to the destination address field (DAF) in packet.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112636952A (en) * | 2020-12-08 | 2021-04-09 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Communication network control topology based on FPGA |
| CN114399897A (en) * | 2022-03-28 | 2022-04-26 | 北京航空航天大学 | Unmanned aerial vehicle swarm dense continuous emission control system based on high-speed optical fiber bus |
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