CN202634438U - Space optical remote sensor communication device - Google Patents
Space optical remote sensor communication device Download PDFInfo
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- CN202634438U CN202634438U CN 201220174440 CN201220174440U CN202634438U CN 202634438 U CN202634438 U CN 202634438U CN 201220174440 CN201220174440 CN 201220174440 CN 201220174440 U CN201220174440 U CN 201220174440U CN 202634438 U CN202634438 U CN 202634438U
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Abstract
A space optical remote sensor communication device comprises a basic physical layer link which comprises an FPGA sending assembly, a light transmission module, a first optical fiber connector, an anti-radiation optical fiber, a second optical fiber connector, a light reception module and an FPGA reception assembly, a box body structure member A, and a box body structure member B. The working mode of the basic physical layer link is a point-to-point simplex communication mode. The FPGA sending assembly and the light transmission module are installed on an internal circuit board a of the box body structure member A. The light transmission module is connected to the first optical fiber connector through a tail optical fiber. The first optical fiber connector penetrates through the box body structure member A, and is fixed on a surface of the box body structure member A. The second optical fiber connector penetrates through the box body structure member B, and is fixed on a surface of the box body structure member B. The anti-radiation optical fiber is positioned between the box body structure member A and the box body structure member B, and connects the first optical fiber connector with the second optical fiber connector. The light reception module and the FPGA reception assembly are installed on an internal circuit board b of the box body structure member B. The light reception module is connected to the second optical fiber connector through a tail optical fiber.
Description
Technical field
The utility model relates to space optical remote sensor, particularly the high speed data transmission system of space optical remote sensor.
Background technology
It is to be digital signal with multichannel coaxial cable transitive graph image-position sensor analog signal conversion that the signal processor of space optical remote sensor mainly acts on, and again digital signal is transported to the satellite data transmission subsystem after synthetic.
As shown in Figure 1, transfer of data adopts the synchronous mode in source, data and clock parallel transmission at present; Transfer of data adopts the private cable connected mode, and transmission medium is the copper cable material.The device of transfer of data comprises: signal processor, private cable, data transmission subsystem.Signal processor transfers to the data transmission subsystem of satellite with the mode of the signal of telecommunication through aerospace level private cable with synthetic image digital signal, has realized that space optical remote sensor imageing sensor digital signal is called out to upload.But adopt the copper cable media, source method of calling transmission data have certain limitation.
One of which, the mode that the source is synchronous, data and clock parallel transmission are walked wire delay according to data and clock, can obtain good sequential capacity at receiving terminal.But when data rate was very high, more than 1G bps, clock and data were sent respectively in the transmission course, in the transmission course shake of each signal transient inconsistent, destroyed receiving the timing relationship between data and the clock.Because the deflection between data and the data; Deflection between data and the clock; Add the influence between the PCB cabling, the inconsistency of the capacitive reactances of signal connector especially all can be aggravated the deviation of clock and data; Cause the efficiently sampling window to diminish gradually, once sample out parallel data to such an extent as to clock signal can not find an effective sampling window at the pin place.
Its two, the cable transmission signal increases (because skin effect and transmission line principle) with frequency, loss of signal and decay also increase, and data transmission bauds is high more, between the data cable mutual interference of signal of telecommunication phase big more, directly influence the reliability of data.Message transmission rate has restriction; Owing to spatial volume in the satellite cabin is little, launch mass has restriction, can not too much increase transmission channel (being transmission cable) simultaneously, and therefore, the data upload capacity is low, has influenced real-time property;
Its three because transmission cable quantity is many, volume is big, weight is big, debugs for the satellite of space and mass-limited, system testing brings difficulty to a certain degree.
Under the limited condition of message transmission rate and passage, the high-speed transfer that can not carry out big Capacity Plan image-position sensor digital signal has just restricted the high real-time development of remote sensing technology high accuracy, becomes one of technical bottleneck of space optical remote sensor.
Summary of the invention
The technology of the utility model is dealt with problems and is: overcome the deficiency of prior art, it is data transfer mode that a kind of on space optical remote sensor, the employing with SERDES is provided, and is the data communication equipment of data transmission medium with optical fiber.
The technical solution of the utility model is: the space optical remote sensor communicator; Comprise the basic physical layer link and box structure A and the box structure B that are made up of FPGA sending assembly, optical transmission module, first optical fiber connector, radioresistance optical fiber, second optical fiber connector, Optical Receivers, FPGA receiving unit, the working method of basic physical layer link is point-to-point simplex pattern;
The internal circuit board a that FPGA sending assembly, optical transmission module are installed on box structure A goes up on the circuit board a; Optical transmission module connects first optical fiber connector through tail optical fiber; First optical fiber connector run through box structure A, and are fixed in its surface; Second optical fiber connector run through box structure B and are fixed in its surface; Radioresistance optical fiber connects first optical fiber connector and second optical fiber connector between box structure A and box structure B; Optical Receivers, FPGA receiving unit are installed on the internal circuit board b of box structure B, and Optical Receivers connects second optical fiber connector through tail optical fiber.
Described FPGA sending assembly and FPGA receiving unit adopt has built-in high speed SERDES translation function stone.
The utility model compared with prior art beneficial effect is:
(1) the solution signal transmission rate is low, the problem that message capacity is little.
Clock and data are sent respectively in transmission course, in the transmission course shake of each signal transient inconsistent, has destroyed and received the timing relationship between data and the clock, thereby transmission rate is difficult to surmount 1G bps.Adopt the clock and data recovery technology generation to replace and transmit data and clock simultaneously, thereby solved the signal clock offset problem of restricting data transmission rate.Transmission rate is promoted greatly.
Adopt fiber medium to replace the copper cable transmission means simultaneously.A very outstanding advantage of fiber medium transmission: speed is high, and transport information capacity is big.The copper cable transmission is to utilize the metal medium transmission of electric signals, and Optical Fiber Transmission then is to utilize transparent Optical Fiber Transmission light wave signal.Though light and electricity all are electromagnetic waves, the operating frequency that the present cable of fiber work frequency ratio uses exceeds 8～9 one magnitude: the fiber work frequency range is 1.67～3.75 * 10 at present
14Hz, and telecommunication cable maximum useful frequency about 9～24 * 10
6Hz.In carrier communication, the frequency of carrier wave is high more, and its information capacity is just big more.Nowadays the development that optical fiber communication obtains advancing by leaps and bounds in the common commercial field, its speed is brought up to present a few T bps by 45M bps in 1978.Adopt the optical fiber mode just can solve the speed problem of copper cable transmission.
(2) solution cable volume is big, the problem that quality is heavy.
Adopt the optical fiber high-speed communication means, a single channel optical fiber only optical fiber gets final product, and the plastic protective layer that is 2.5mm by diameter optical fiber that is 125um and overall diameter can constitute a holocentric optical fiber.The weight of this optical fiber is 6kg/km, and loss is 5dB/km.And during the signal of typical RG-19/U coaxial cable transmission 100MHz, its loss is 22.6dB/km.The outer diameter of this coaxial cable is 28.4mm, and weight is 1110kg/km.Optical cable is conspicuous in the advantage aspect size and the weight.The size of optical fiber is little, and is in light weight, is particularly suitable for the place limited in some spaces and uses.
(3) transfer of data is more reliable.
The basic material of optical fiber is a silicon dioxide, so be that self sends signal or the external electromagnetic radiation can not produce electric current in optical fiber.And the light wave in the optical fiber is limited in the fibre core well, so transmission course is not leaked, also just can not disturb the signal in other optical fiber.Otherwise, can not optical coupling be advanced the optical fiber from outer fiber.Comprehensively said, optical fiber has fabulous anti-radio frequency interference (RFI) and anti-electromagnetic interference (EMI)
(4) good confidentiality of optical fiber communication, difficult quilt is eavesdropped.
Because optical fiber is propagated the light signal constraint in fiber cores in transmission course, light signal is minimum to external radiation, leakage, and cross-talk is very little between the optical fiber, in transmission, is difficult to eavesdropped, so the optical fiber communication good confidentiality.
(5) optical fiber has the ability that more conforms and change
The communicator chemically stable is good, and is corrosion-resistant, and the life-span is long.Quartz glass is corrosion-resistant.The optical fiber splice place does not produce discharge, does not have electric spark.
Description of drawings
Fig. 1 is the utility model background technology sketch map;
Fig. 2 is the utility model communicator principle schematic;
Fig. 3 is the utility model communicator principle framework figure;
Fig. 4 is the utility model FPGA assembly transport communication workflow;
Fig. 5 is the utility model radioresistance, high-low temperature resistant optical fiber structure sketch map.
Embodiment
Understand for the purpose, technical scheme and the advantage that make the utility model is more clear, below in conjunction with embodiment, and with reference to accompanying drawing, to the utility model further explain.
Like Fig. 2, shown in 3, device comprises transmitting terminal and receiving terminal, is connected through radioresistance optical fiber 4 between transmitting terminal and the receiving terminal; Transmitting terminal comprises FPGA sending assembly 1, optical transmission module 2, first optical fiber connector 3, and receiving terminal comprises second optical fiber connector 5, Optical Receivers 6, FPGA receiving unit 7; FPGA sending assembly 1, optical transmission module 2, first optical fiber connector 3, radioresistance optical fiber 4, second optical fiber connector 5, Optical Receivers 6, FPGA receiving unit 7 have constituted the basic physical layer link of communicator; Working method is point-to-point simplex pattern, has realized the data transmission subsystem of space optical remote sensor view data high-speed uploading to satellite platform.The annexation of each several part is following:
Introduce the realization of each part mentioned above below respectively, specific as follows:
(1) FPGA assembly (FPGA sending assembly 1, FPGA receiving unit 7)
FPGA sending assembly 1: the multi-path digital view data of optical sensor output, clock, the enable signal of outside input convert one road serial signal to, form the serial line interface differential electric signal;
FPGA receiving unit 7: the serial line interface differential electric signal that receives gone here and there changes and handles, and restores view data, clock, control signal.Be uploaded to the data transmission subsystem of satellite platform simultaneously, thus the function of implementation space optical sensor imageing sensor digital signal high-speed uploading to satellite platform.
As shown in Figure 4, FPGA sending assembly 1 workflow is following:
(1.1) receive the multi-path digital view data of each optical sensor output constantly in real time, clock, the enable signal of outside input converts one road serial line interface differential electric signal to; This serial line interface differential electric signal is formed a packet as data cell binding data head, data tail; And carry out buffer memory according to the rule of first in first out; Described data head, data tail are the control K sign indicating number that forms according to the 8B/10B coding rule;
Data head is formed 16 binary codes by/K28.1/K28.5/ and is indicated and after this be the data cell content; The data tail is formed 16 binary codes by/K28.7/K29.7/ and is indicated after this and end for data cell; The data flow that data cell is a BTU Basic Transmission Unit by several 16 Bit datas.
Stipulate according to control K sign indicating number: the coding of data head is :/001 111,00/,101 11100/;
The coding of data tail is :/111 111,00/,111 11101/.
According to different demands, imageing sensor pixel quantisation depth is multiple, like 8 bits, and 10 bits, 14 compare top grade.According to the normalization design, set each pixel data and transmit with 16bit, setting 16bit highest order (being B15) is enable signal; (when transmitting 8 bit image, B [14:8] bit is " 1 " for " 1 " to set corresponding invalid bit; When transmitting 10 bit image, B [14:10] bit is " 1 "; When transmitting 14 bit image, B [14] bit is " 1 ").
(1.2) send calling character to optical transmission module 2, be sent to receiving terminal by optical transmission module 2;
Device work begins, and transmitting terminal needs the call reception end to carry out to receive data to prepare, send earlier call out character (/K28.3/K28.6/) set up correspondence with receiving terminal;
In the communication transmission process, between packet and the packet by call signal (/K28.3/K28.6/) keep the unimpeded & of transmission link to be ready to state.
Stipulate according to control K sign indicating number: the coding of call signal is :/01111100/11011100/;
(1.3) wait at least 5ms after, from buffer memory, take out a packet, judge the state of the enable signal in this packet, when be enabled, this packet is sent to receiving terminal through optical transmission module 2, send accomplish after commentaries on classics step (1.2); Otherwise, directly change step (1.2).
Described FPGA receiving unit 7 workflows are following:
(7.1) receive the calling character that Optical Receivers 6 receives from transmitting terminal, prepare to receive packet;
(7.2) packet that receives is carried out data extract, remove data head, the data tail obtains data cell;
(7.3) whether occur controlling the K sign indicating number in the judgment data unit,, think that then data cell makes mistakes, abandon this data cell, change step (7.1) if control K sign indicating number occurs; Otherwise, data cell is reduced into multi-path digital view data, outside clock, the enable signal of importing.
Receiving terminal constantly detects RXCHARISK [1:0] (the detection K code function that carries on the inside of FPGA), and when the data cell that receives was control K sign indicating number, RXCHARISK was output as high signal.
The design's transfer of data is 16; So only need to detect RXCHARISK [1] and RXCHARISK [0]; If in the data transmission procedure between data head and data tail, two output input go out a high level signal, think that promptly the clear data transmission stage breaks down.The recipient then abandons this packet, and the Waiting for Call signal prepares to receive next packet again.
Above-mentioned said FPGA sending assembly 1 adopts the Virtex-5 Series FPGA product XC5VFX70T with embedded string and transmission and receiver (SERDES) stone module with FPGA receiving unit 7.
(2) optical transmission module 2, Optical Receivers 6
Optical transmission module 2: the differential electric signal that FPGA sending assembly 1 is seen off converts light signal to, delivers to coupled tail optical fiber.Optical transmission module 2 plays the effect of an electricity/light conversion in optical transmission process, optical transmission module 2 inputs be differential electric signal, output be light signal;
Optical Receivers 6: the light signal that its tail optical fiber is received converts the serial line interface differential electric signal to, delivers to FPGA receiving unit 7.Optical Receivers 6 plays the effect of a light/electricity conversion in optical transmission process, the Optical Receivers input be light signal, output be differential electric signal;
Light transmission/the receiver module of this programme adopts the USOT22D214M module.The operation wavelength of characteristics: 1310nm, monomode fiber; Each passage can provide the transmission rate up to 4.25Gbps; The metal shell enclosed package, the anti-electromagnetic interference performance of enforcement module; Wide operating temperature range :-45～85 ℃; Radioresistance accumulated dose 2 * 10E5rad (Si).
(3) fiber optic connector assembly
First optical fiber connector 3: the tail optical fiber of optical transmission module 2 is docked with radioresistance optical fiber 4, make light signal be coupled to radioresistance optical fiber 4 from the tail optical fiber of optical transmission module 2;
Second optical fiber connector 5: the tail optical fiber of radioresistance optical fiber 4 with Optical Receivers 6 docked, make light signal be coupled to the tail optical fiber of Optical Receivers 6 from radioresistance optical fiber 4;
Fiber optic connector assembly adopts the optical fiber connector of ELIO series: 8D5E13TF02AN plug, 8D0E13TF02BN socket.Characteristics: material is the nickel plating of titanium housing, and material gentlier meets space environment; Product by MIL-DTL-38999K series III derivation; Through ARINC 801, EN4531, standard authentications such as BS1379; 38999 housings of employing standard and special insulation mounting panel; Adopting bayonet socket is the maintenance system, and installation and removal are all very convenient; Connect reliable design, anti-judder.
(4) radioresistance optical fiber 4
Radioresistance optical fiber 4: as the media of optical transmission, will mainly act on is transmitting optical signal;
Optical fiber in the utility model adopts the radioresistance monomode fiber.As shown in Figure 5, be followed successively by fibre core 8, covering 9, coat 10, reinforced layer 11, outer jacket 12 from the inside to the outside.Fiber selection radioresistance, the extraordinary monomode fiber of high-low temperature resistant.This is to Low Earth Orbit, the optical fiber of the long-life work of applied environment designs such as nearly space and field, deep space.Compare with traditional monomode fiber, the radioresistance monomode fiber can bear very rugged environment, can stable performance be arranged in the fast-changing temperature environment significantly.
The unspecified part of the utility model belongs to general knowledge as well known to those skilled in the art.
Claims (2)
1. space optical remote sensor communicator; It is characterized in that: comprise the basic physical layer link and box structure A and the box structure B that are made up of FPGA sending assembly (1), optical transmission module (2), first optical fiber connector (3), radioresistance optical fiber (4), second optical fiber connector (5), Optical Receivers (6), FPGA receiving unit (7), the working method of basic physical layer link is point-to-point simplex pattern;
FPGA sending assembly (1), optical transmission module (2) are installed on the internal circuit board a of box structure A; Optical transmission module (2) connects first optical fiber connector (3) through tail optical fiber; First optical fiber connector (3) run through box structure A, and are fixed in its surface; Second optical fiber connector (5) run through box structure B and are fixed in its surface; Radioresistance optical fiber (4) connects first optical fiber connector (3) and second optical fiber connector (5) between box structure A and box structure B; Optical Receivers (6), FPGA receiving unit (7) are installed on the internal circuit board b of box structure B, and Optical Receivers (6) connects second optical fiber connector (5) through tail optical fiber.
2. space optical remote sensor communicator according to claim 1 is characterized in that: described FPGA sending assembly (1) and FPGA receiving unit (7) adopt has built-in high speed SERDES translation function stone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220174440 CN202634438U (en) | 2012-04-23 | 2012-04-23 | Space optical remote sensor communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220174440 CN202634438U (en) | 2012-04-23 | 2012-04-23 | Space optical remote sensor communication device |
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| Publication Number | Publication Date |
|---|---|
| CN202634438U true CN202634438U (en) | 2012-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220174440 Expired - Fee Related CN202634438U (en) | 2012-04-23 | 2012-04-23 | Space optical remote sensor communication device |
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| CN (1) | CN202634438U (en) |
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2012
- 2012-04-23 CN CN 201220174440 patent/CN202634438U/en not_active Expired - Fee Related
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20160423 |
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| CF01 | Termination of patent right due to non-payment of annual fee |