CN201533376U - Device based on airborne image transmission system - Google Patents
Device based on airborne image transmission system Download PDFInfo
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- CN201533376U CN201533376U CN 200920153641 CN200920153641U CN201533376U CN 201533376 U CN201533376 U CN 201533376U CN 200920153641 CN200920153641 CN 200920153641 CN 200920153641 U CN200920153641 U CN 200920153641U CN 201533376 U CN201533376 U CN 201533376U
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Abstract
The utility model relates to a device based on an airborne image transmission system, which is provided with a transmitting system and a receiving system. The transmitting system comprises an airborne transmitter case, an A/D converter, an MPEG-2/4 encoder, a COFDM modulator, an upper frequency converter, a power amplifier and an antenna, wherein the airborne transmitter case is provided with a case panel and a manual control key disposed on the panel, the A/D converter, the MPEG-2/4 encoder, the COFDM modulator, the upper frequency converter, the power amplifier and the antenna are arranged inside the airborne transmitter case, a signal input end of the airborne transmitter case is at least provided with a signal input port including an analogue composite video and an analogue audio, and signal input ports of the analogue composite video and the analogue audio are connected with the A/D converter arranged inside the airborne transmitter case. The receiving system comprises a receiver case, an antenna, a filter, a lower frequency converting/low noise device, an intermediate frequency amplifier, a COFDM encoder, an MPEG-2/4 encoder and a D/A converter, wherein the antenna, the filter, the lower frequency converting/low noise device, the intermediate frequency amplifier, the COFDM encoder, the MPEG-2/4 encoder and the D/A converter are arranged inside the receiver case, a signal input end of the receiver case is at least provided with signal output ports including an analogue composite video signal output port and an analogue audio signal output port, and output ports of the analogue composite video and the analogue audio are connected with the D/A converter inside the receiver case.
Description
Technical field
The utility model relates to a kind of digital radio image delivering system towards various load tool applications exploitations, specifically a kind of device based on airborne image delivering system.
Background technology
In built-up city or other adverse circumstances, how considering high-quality ground of transmission video image under multipath effect (extra large clutter) serious situation has the index of several quantifications: at first, the picture system transmitting device should have high-quality and " penetrate " ability and remarkable " diffraction " ability, do not need directional antenna can realize the covering of subrange, the city that this covering can involve provincial capital's level one-level simultaneously also can reliable and stable work on motion platforms such as various vehicles, naval vessel, aircraft; And, system also should have transmission of one line image simultaneously, one road stereo language (or the ability of the dual track voice of available property, the system transmission of one line user data that also should have available property, but make image, voice, data all ability, the system of encrypted transmission also should have and can carry out in real time, continuously, and the image transmittability, the system that reach the DVD quality also should have data channel and can be used for the data of transmit GPS locator data, sensor acquisition or the ability of other telegraph text data.Yet, with regard to background technology, the equipment that possesses above-mentioned multinomial function operating mode simultaneously still exists the difficult problem that technology is integrated, and one of its reason is how the emission system in the image transmission is multiplexed to video and audio signal one and closes circuit-switched data and launched by antenna after modulating; Its former therefore two be how to solve airborne emission system multiple interfaces externally is provided, be convenient to the problem that the user carries out multiple application; And with it matching problem of corresponding supporting wireless image transmission receiving system.
The utility model content
The purpose of this utility model is to solve defective and the application not wide in range problem of airborne image delivering system of the prior art on structural design.
For this reason, the technical scheme that the utility model provides is: a kind of device of airborne image delivering system, have emission system and receiving system, wherein, described emission system comprises the airborne transmitter cabinet that has cabinet panel and be arranged on the manual operating key on the described panel, be arranged on the A/D converter in the described airborne transmitter cabinet, the MPEG-2/4 encoder, the COFDM modulator, upconverter, power amplifier, antenna, at least be provided with at the signal input part of described airborne transmitter cabinet and comprise Analog Composite Video, analogue audio frequency is at interior signal input port, described Analog Composite Video, A/D converter in simulated audio signal input port and the described airborne transmitter cabinet is connected; Described receiving system comprises the receiver cabinet, be arranged on antenna, filter, down-conversion/low noise device, intermediate frequency amplifier, COFDM decoder, MPEG-2/4 decoder, D/A converter in the described receiver cabinet, signal input part at described receiver cabinet is provided with the signal output port that comprises Analog Composite Video, analogue audio frequency at least, and described Analog Composite Video, simulated audio signal output port are connected with D/A converter in the described receiver cabinet.
As preferably, described emission system can adopt multiple different transmitting powers configuration and antenna configurations, its index is: 500mW/1W/2W/4W/10W, and every kind of power configuration and power output are regulated and can be regulated by the manual operating key that is arranged on the described transmitter cabinet panel.
As preferably, its modulation parameter of COFDM modulator that is arranged in the described emission system comprises following optional:
Channel width: 16MHz/8MHz/4MHz/2MHz;
Guard time interval: 1/32,1/16,1/8,1/4;
Chnnel coding: 1/2,2/3,3/4;
Modulation constellation: QPSK/16QAM/64QAM.
As preferably, be arranged on the encoder in the described emission system, be a kind of encoder of modularized design, and comprise optional MPEG2 or MPEG4.
Compared to existing technology, the technological progress that the utlity model has is conspicuous: the image delivering system of this device has adopted advanced COFDM modulation-demodulation technique, channel coding/decoding technology, and, can under high-speed mobile environment, realize real-time, the synchronous transmission of broadband multimedia services such as video, voice, data in conjunction with multi-media network transmission technologys such as digital image compression MPEG2/MPEG4.The high-quality audio frequency of looking is except that the requirement to video camera, and is also quite high to the requirement of encoding stream, channel speed.
Description of drawings
Fig. 1 is the overall structure and the workflow diagram of the device that relates to of the utility model;
Fig. 2 is the emission system structural representation in this device;
Fig. 3 is the receiving system structural representation in this device;
Fig. 4 is that the signal of airborne transmitter and grounded receiving station in this device links schematic diagram.
Among the figure: 1-airborne transmitter cabinet, 2-airboarne receiver cabinet.
Embodiment
Referring to Fig. 1, the workflow of this device is: send into power amplifier by the sound of this device emission system, signal that the video signal input terminal mouth collects after sound, video coding and modulation, sent into the radio-frequency (RF) output end mouth through filter filtering and launch through radio-frequency antenna by what power amplifier had been handled afterwards; The radio frequency input aerial of this device receiving system receive electromagnetic wave after after the filtering again signal send into frequency converter, be sent to sound, Video Decoder by the signal of frequency converter output, afterwards, the audio-video signal after the reduction reappears on client's display unit.
Referring to Fig. 2,3, compare the workflow of this device, the utility model relates to a kind of device as can be seen based on airborne image delivering system, have emission system and receiving system, wherein, described emission system comprises the airborne transmitter cabinet 1 that has cabinet panel and be arranged on the manual operating key (not drawing among the figure) on the described panel, be arranged on the A/D converter in the described airborne transmitter cabinet 1, the MPEG-2/4 encoder, the COFDM modulator, upconverter, power amplifier, antenna, at least be provided with at the signal input part of described airborne transmitter cabinet 1 and comprise Analog Composite Video, analogue audio frequency is at interior signal input port, described Analog Composite Video, A/D converter in simulated audio signal input port and the described airborne transmitter cabinet is connected; Described receiving system comprises receiver cabinet 2, be arranged on antenna, filter, down-conversion/low noise device, intermediate frequency amplifier, COFDM decoder, MPEG-2/4 decoder, D/A converter in the described receiver cabinet 2, signal input part at described receiver cabinet 2 is provided with the signal output port that comprises Analog Composite Video, analogue audio frequency at least, and described Analog Composite Video, simulated audio signal output port are connected with D/A converter in the described receiver cabinet.
On overall construction design, the emission system of this device can adopt multiple different transmitting powers configuration and antenna configurations, its indication range is: 500mW/1W/2W/4W/10W, and every kind of power configuration and power output are regulated and can be regulated by the manual operating key (not drawing among the figure) that is arranged on the described transmitter cabinet panel.In like manner, from the angle of the convenient use of user, the COFDM modulator design that is arranged in the described emission system is a subminaturization, and its modulation parameter can be free by the user, and its parameter area comprises:
Channel width: 16MHz/8MHz/4MHz/2MHz;
Guard time interval: 1/32,1/16,1/8,1/4;
Chnnel coding: 1/2,2/3,3/4;
And be arranged on encoder in the described emission system, be a kind of encoder of modularized design, and comprise optional MPEG2 or MPEG4 that this is because MPEG4 has adopted object-based compaction coding method, it is divided into different objects to image and video, handles respectively.Make and compare with MPEG2 that the decoding of MPEG4 is more efficient, the image quality of showing at user terminal is more clear, and innervation is more optimized.
In addition, for being applied to various motion platform environment better, the dynamic security power of this device can reach more than the 20W, and 1 of transmitter cabinet can adopt the 2U standard PC case, receiver cabinet 2 adopts the 1U standard PC cases, these cabinets standard industry frame of all can directly packing into.
Sound, the video signal input terminal interface of this device transmitter cabinet 1 comprise main and auxiliary channel interface, main path interface has AV video interface, ethernet standard interface (10/100BASE-T self adaptation) and E1 data-interface, and these interfaces can be connected with audio coder ﹠ decoder (codec) with image codec easily; Simultaneously, the secondary channels interface of transmitter cabinet 1 then provides the RS232 data-interface and the double-directional speech business interface of connection, wherein, the double-directional speech business interface can carry out voice contact with command centre, the RS232 data-interface can insert the GPS receiver, transmit the GPS locating information to command centre, finish figure and pass and combining of locating.
In more detail, the emission system of this device is image, sound or the data of audio frequency and video source or data source collection to be carried out compressed encoding by transmitter and convert the microwave radio modulation signal to being transmitted in the space by antenna and propagating.Its equipment generally comprises: transmitter, video camera (camera, DV or professional camera), antenna feeder part, power pack.Wherein, transmitter is that the video and audio signal from video camera is become digital signal by A/D converter, close circuit-switched data through being multiplexed to one behind the coding, at COFDM modulating unit progradation combined coding, the mapping of encoding at last, mapping back planisphere carries out OFDM (orthogonal multiple carrier) modulation.Two-way orthogonal signalling after the COFDM modulation are carried out quadrature modulation with the low local oscillator of making an uproar mutually, and the rf modulated signal that obtains is sent to antenna and launches after sideband filter, power amplifier amplify.
Transmitter techniques parameter among the embodiment comprises:
Working frequency range: 280～800MHz, 1000～1700MHz, 2300～2700MHz;
Concrete working frequency range customizes according to customer requirements, can detect newspaper dispatching from the factory of every equipment
Indicate in the announcement
Channel width: 4MHz;
Image compression: MPEG4;
The video input: one road PAL, composite analog video, 1VPP, impedance is 75 Ω;
Audio frequency input: left and right acoustic channels, 12dBm;
Audio coding: 728Kbps is stereo;
Image analysis: level is resolved: 720 pixels; The vertical parsing: 576 pixels;
Modulation system: COFDM, QPSK;
Number of carriers: 1705 (2K patterns);
Forward error correction: 1/2,2/3,3/4,5/6,7/8 is optional;
The protection interval: 1/32,1/16,1/8,1/4 is optional;
Interleave depth: long interweave (200ms);
System delay: about 600ms;
Transmission capacity: unidirectional one road D1 image, two-way sound accompaniment and one road narrow band data;
Channel data rates: 2.6Mbps (comprising image, voice and narrow band data);
Narrow band data speed: 9.6Kbps, asynchronous, serial, single worker, RS232;
Power output: maximum 20W, if need bigger power output to customize;
Power is adjusted: with the button adjustment of cabinet panel, adjusting range: 1W～20W;
Channel adjustment: with the button adjustment of cabinet panel, adjusting range: 8 channels;
Channel step frequency: 0.5M～5Mbps;
Band is outer to be suppressed: greater than 40dB;
Translational speed: speed per hour is greater than 200 kilometers stable receptions;
Power supply: AC220V;
Overall Power Consumption:＜160W@ power output 20W;
Stream time: do not limit;
Ambient temperature :-25 ℃～60 ℃;
Storage temperature :-40 ℃～+ 80 ℃;
Ambient humidity:＜95%, non-condensing;
Transmitter size: 420 * 300 * 88mm (disregarding connector and clamping plate, is 482.6 when counting clamping plate, all the other size constancies);
Transmitter weight: about 5 kilograms (concrete weight is relevant with model).
If after adding the double-directional speech function, following parameter is arranged then:
Reverse voice: one tunnel;
Working frequency range: 229MHz;
Transmitting power: 10W;
Reverse data: one road narrow band data;
Priority: reverse data and the reverse shared channel of voice, high priority data;
Coverage: about 13 kilometers (at least one end antenna places high relatively point).
The receiving system of this device is the radiofrequency signal that antenna is received, and separates through the COFDM demodulating unit and extrudes original audio-video signal, and output to the audio frequency and video monitor.Its equipment generally comprises: receiver, antenna feeder part, channel filtering and frequency conversion part, power pack.The workflow of receiver is opposite with the workflow of transmitter: the microwave signal of receiving from antenna is delivered to channel model, the low noise amplifier of receiver through feeder line, exports to the COFDM demodulating unit.The modulation signal that the COFDM demodulating unit is sent radio frequency unit here earlier carries out demodulation, and the baseband signal that obtains is delivered to the COFDM baseband processor, and baseband processor is finished the audio, video data after recovering to compress.Then use the decoder original digital signal that decompresses out, digital signal can be connected to monitor and audio amplifier through becoming the audio-video signal of simulation behind the D/A converter.
Receiver technical parameter among the embodiment comprises:
Power supply: AC220V/DC12V;
Working temperature :-25 ℃～60 ℃;
Storage temperature :-40 ℃～+ 80 ℃;
Ambient humidity:＜95%, non-condensing;
Receiver size: industrial standard 1U cabinet (420 * 200 * 45mm disregards connector);
Receiver weight: 1.7Kg (not containing battery);
Threshold level :-103dBm (10
-6BER @4MHz channel width);
Image output: one road analog image, resolution 720 * 576;
Voice output: dual track voice (left and right acoustic channels);
Data output: one road RS232 data (optional);
Image stream output: one road IP traffic image, can directly insert computer network (optional);
Phonetic entry: one road speech input (supporting double-directional speech, optional);
Control interface: RS232 is used for equipment disposition;
Radio frequency interface: 50 ohm, N type female (hole);
Stream time: do not limit.
As a kind of examination, the utility model can quantize its technical indicator with industrialized standard:
Transmission of one line high-quality (DVD) image, one road stereo language (left and right acoustic channels);
Transmission of one line data (option);
Support double-directional speech (option);
Multicarrier COFDM modulation technique;
Realize the transmission of high-quality realtime graphic in the high-speed motion; Translational speed reaches more than 200 kilometers;
But image, voice, data are encrypted transmission all; Cryptographic algorithm: AES, 128 keys;
Image compression algorithm: MPGE2/MPEG4 is optional;
Working frequency range: 280～800MHz, 1.0G～1.7GHz, 2.3G～2.7GHz (the preceding customization of dispatching from the factory);
Working frequency points: the CONFIG of operation cabinet panel can change frequency by strong, switches in turn between 8 default channels; Can avoid noise jamming by changing frequency;
The FUNC of (having omitted among the figure) operation cabinet panel can change transmitting power by strong, changes scope 1W～20W; Turn to guarantee personal security (turning transmitting power when personnel bear down) to greatest extent down, transfer to enlarge transmission range (transferring big transmitting power during vehicular applications) greatly;
High receiving sensitivity: reach-103dBm (10
-6BER @4MHz channel width);
Can walk around the building transmission, but in built-up city operate as normal;
Anti-multipath disturbs, but in the sea operate as normal, can be used for ship-to-ship, ship to shore, ship to aircraft transmissions.
In sum, application of the present utility model can comprise:
From ground between public security, People's Armed Police, procuratorial work, traffic police, high speed traffic police, frontier defense, coast defence, fire-fighting, people's air defense, vehicle, naval vessel and the vehicle naval vessel to the fixing point images; From aerial images earthward and be used for the field and the occasion of live live and other all image transmission of various aircraft, unmanned plane, helicopter, dirigible, balloon, army's manoeuvre, forest ranger, forest fire prevention and control, news interview car image relaying, sports tournament.
Claims (4)
1. device based on airborne image delivering system, have emission system and receiving system, it is characterized in that, described emission system comprises the airborne transmitter cabinet that has cabinet panel and be arranged on the manual operating key on the described panel, be arranged on the A/D converter in the described airborne transmitter cabinet, the MPEG-2/4 encoder, the COFDM modulator, upconverter, power amplifier, antenna, at least be provided with at the signal input part of described airborne transmitter cabinet and comprise Analog Composite Video, analogue audio frequency is at interior signal input port, described Analog Composite Video, A/D converter in simulated audio signal input port and the described airborne transmitter cabinet is connected; Described receiving system comprises the receiver cabinet, be arranged on antenna, filter, down-conversion/low noise device, intermediate frequency amplifier, COFDM decoder, MPEG-2/4 decoder, D/A converter in the described receiver cabinet, signal input part at described receiver cabinet is provided with the signal output port that comprises Analog Composite Video, analogue audio frequency at least, and described Analog Composite Video, simulated audio signal output port are connected with D/A converter in the described receiver cabinet.
2. the device based on airborne image delivering system according to claim 1, it is characterized in that, described emission system adopts more than one transmitting power configuration and antenna configurations at least, its indication range is: 500mW/1W/2W/4W/10W, and every kind of power configuration and power output are regulated and can be regulated by the manual operating key that is arranged on the described transmitter cabinet panel.
3. the device of airborne image delivering system according to claim 1 is characterized in that, its modulation parameter of COFDM modulator that is arranged in the described emission system comprises following optional:
Channel width: 16MHz/8MHz/4MHz/2MHz;
Guard time interval: 1/32,1/16,1/8,1/4;
Chnnel coding: 1/2,2/3,3/4;
Modulation constellation: QPSK/16QAM/64QAM.
4. the device based on airborne image delivering system according to claim 1 is characterized in that, is arranged on the encoder in the described emission system, is a kind of encoder of modularized design, and comprises optional MPEG2 or MPEG4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920153641 CN201533376U (en) | 2009-05-07 | 2009-05-07 | Device based on airborne image transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920153641 CN201533376U (en) | 2009-05-07 | 2009-05-07 | Device based on airborne image transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201533376U true CN201533376U (en) | 2010-07-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920153641 Expired - Fee Related CN201533376U (en) | 2009-05-07 | 2009-05-07 | Device based on airborne image transmission system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291567A (en) * | 2011-04-14 | 2011-12-21 | 西安烽火电子科技有限责任公司 | Microwave digital image transmission system |
| CN102695041A (en) * | 2012-04-27 | 2012-09-26 | 中国科学院空间科学与应用研究中心 | Unmanned plane load device with real-time wireless high resolution image transmission function |
| CN102891995A (en) * | 2012-10-30 | 2013-01-23 | 济南知芯集成电路技术有限公司 | Wireless AV (audio/video) acquisition system |
| CN103501425A (en) * | 2013-09-25 | 2014-01-08 | 成都航天通信设备有限责任公司 | TDD high-speed image transmission system, communication control method and working method |
| CN103684571A (en) * | 2013-11-25 | 2014-03-26 | 成都时代星光科技有限公司 | Ultralow-delay digital high-definition image relay module of unmanned aerial vehicle |
| CN103686091A (en) * | 2013-12-23 | 2014-03-26 | 张兴玉 | Motorized multimedia communication emergency rescue command system |
| CN103701746A (en) * | 2013-11-21 | 2014-04-02 | 郑州三和视讯技术有限公司 | Time-division two-way narrow-band common-frequency multi-service wireless transmission method |
| CN105376606A (en) * | 2015-12-08 | 2016-03-02 | 上海倍安实业有限公司 | Fire image processing terminal and fire command method based on terminal |
| CN105472411A (en) * | 2015-12-08 | 2016-04-06 | 上海倍安实业有限公司 | Firefighting image processing system and firefighting image processing method based on same |
| CN108469835A (en) * | 2018-03-26 | 2018-08-31 | 华南农业大学 | A kind of control system and method for the raising unmanned plane during flying efficiency based on Ubuntu |
| CN111130746A (en) * | 2020-01-03 | 2020-05-08 | 西北工业大学 | Method for transmitting telemetering data through sound channel |
-
2009
- 2009-05-07 CN CN 200920153641 patent/CN201533376U/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102291567B (en) * | 2011-04-14 | 2013-10-02 | 西安烽火电子科技有限责任公司 | Microwave digital image transmission system |
| CN102291567A (en) * | 2011-04-14 | 2011-12-21 | 西安烽火电子科技有限责任公司 | Microwave digital image transmission system |
| CN102695041A (en) * | 2012-04-27 | 2012-09-26 | 中国科学院空间科学与应用研究中心 | Unmanned plane load device with real-time wireless high resolution image transmission function |
| CN102891995A (en) * | 2012-10-30 | 2013-01-23 | 济南知芯集成电路技术有限公司 | Wireless AV (audio/video) acquisition system |
| CN103501425B (en) * | 2013-09-25 | 2017-04-12 | 成都航天通信设备有限责任公司 | Communication control method for TDD high-speed image transmission system |
| CN103501425A (en) * | 2013-09-25 | 2014-01-08 | 成都航天通信设备有限责任公司 | TDD high-speed image transmission system, communication control method and working method |
| CN103701746A (en) * | 2013-11-21 | 2014-04-02 | 郑州三和视讯技术有限公司 | Time-division two-way narrow-band common-frequency multi-service wireless transmission method |
| CN103684571A (en) * | 2013-11-25 | 2014-03-26 | 成都时代星光科技有限公司 | Ultralow-delay digital high-definition image relay module of unmanned aerial vehicle |
| CN103686091A (en) * | 2013-12-23 | 2014-03-26 | 张兴玉 | Motorized multimedia communication emergency rescue command system |
| CN105472411A (en) * | 2015-12-08 | 2016-04-06 | 上海倍安实业有限公司 | Firefighting image processing system and firefighting image processing method based on same |
| CN105376606A (en) * | 2015-12-08 | 2016-03-02 | 上海倍安实业有限公司 | Fire image processing terminal and fire command method based on terminal |
| CN108469835A (en) * | 2018-03-26 | 2018-08-31 | 华南农业大学 | A kind of control system and method for the raising unmanned plane during flying efficiency based on Ubuntu |
| CN111130746A (en) * | 2020-01-03 | 2020-05-08 | 西北工业大学 | Method for transmitting telemetering data through sound channel |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100721 Termination date: 20180507 |