CN201491184U - Airborne wireless broadband communication system - Google Patents
Airborne wireless broadband communication system Download PDFInfo
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- CN201491184U CN201491184U CN2009202251761U CN200920225176U CN201491184U CN 201491184 U CN201491184 U CN 201491184U CN 2009202251761 U CN2009202251761 U CN 2009202251761U CN 200920225176 U CN200920225176 U CN 200920225176U CN 201491184 U CN201491184 U CN 201491184U
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Abstract
The utility model discloses an airborne wireless broadband communication system. The airborne wireless broadband communication system comprises an airborne device and a ground station device establishing connection through wireless communication, wherein the airborne device comprises airborne transmitting equipment and airborne receiving equipment; the ground station device comprises ground station transmitting equipment and ground station receiving equipment; and communication between the airborne device and the ground station device is dependent on COFDM technology. The airborne wireless broadband communication system can transmit multi-path images and can achieve excellent transmitting capacity under non-sight distance and complex terrain conditions.
Description
(1) technical field
The utility model relates to a kind of machine-carried wireless broadband communication system, specifically is the multimedia messages transmission field that is applied in the unmanned plane electric power line walking technical field, is used to realize the system of airborne equipment and earth station equipment communication.
(2) background technology
When utilizing unmanned plane to carry out the electric power line walking, not only need the real-time Transmission visible images, also need to utilize thermal infrared imager to detect the thermal defect of power equipment and circuit, utilize the ultraviolet thermal imaging system to detect the power equipment corona discharge, find various faults and defective in the power transmission and transformation line effectively.In the art, No. 2006100258771 patent of invention of China can only be transmitted the single channel image, can not the transmitting multi-path video data, can't satisfy of the requirement of present electric power system line walking to transfer of data.
In addition, during unmanned plane electric power line walking, not only to get off the picture signal real-time Transmission that video camera, thermal infrared imager, ultraviolet imagery instrument on the unmanned plane are taken, also need the control command of ground station is real-time transmitted on the unmanned plane, so that control focusing grabgraf video recordings such as gondola rotation, video camera, thermal infrared imager, ultraviolet imagery instrument in real time, when debugging at a distance in addition, also need the picture signal of ground station or ground control's car is real-time transmitted on the monitor of unmanned plane, so that unmanned plane debugging on-the-spot and ground station or the timely communication exchange of ground control's car.
Yet, unmanned plane electric power line walking work under bad environment, often need on the outskirts of a town, non-intervisibility such as mountain region, building and the environment work down that stops is arranged, traditional microwave imagery transmission system must could be set up data link under sighting condition, signal fadeout is serious, more difficult passing through building, transmitting and receiving antenna all needs accurate location, installs, sets up, uses very inconvenient, not only directly limited and looked obtaining of audio-source, and the reliability of system, operating efficiency are also had a greatly reduced quality.Still can't overcome at present the environmental suitability problem of unmanned plane electric power line walking, its scope of application is subjected to very big influence.
(3) summary of the invention
Therefore, the utility model is intended to solve the technical problem that existing machine-carried wireless broadband transmission system can not be transmitted multiway images simultaneously, and the environmental suitability problem of the both-way communication problem of airborne equipment and earth station equipment and equipment, and a kind of WiMAX communication system based on coded orthogonal frequency division multiplex technique (COFDM) is provided.
The technical solution adopted in the utility model is:
The utility model machine-carried wireless broadband communication system, comprise the airborne equipment and the earth station equipment that connect by wireless telecommunications, wherein airborne equipment comprises airborne transmitting equipment and airborne receiving equipment, and described earth station equipment comprises ground station's transmitter and ground station's receiving equipment
Described airborne transmitting equipment comprises:
Video capture device is used to gather the first required video data of line walking;
The COFDM modulation module is used for described first video data is encoded with the COFDM technology, to obtain to be fit to first data-signal of wireless channel transmission;
Transmitter and transmitting antenna become first of default first frequency to transmit the described first data-signal frequency conversion and to aerial emission;
Described ground station receiving equipment comprises:
Receiver and reception antenna are used to receive described first and transmit, and with this signal frequency conversion to the first intermediate-freuqncy signal;
The COFDM demodulation module is used for described first intermediate-freuqncy signal is demodulated first video data of its correspondence;
Monitor is used to show described first video data;
Described ground station transmitter comprises:
Video camera obtains ground station's image information;
The COFDM modulation module is used for described image information and ground station control instruction are become to be fit to second data-signal that wireless channel transmits with the COFDM technological adjustment;
Transmitter and transmitting antenna are used for becoming second of default second frequency to transmit to aerial emission the described second data-signal frequency conversion;
Described airborne receiving equipment comprises:
Receiver and reception antenna are used to receive described second and transmit and its frequency conversion is become second intermediate-freuqncy signal;
The COFDM demodulation module is used for described second intermediate-freuqncy signal is demodulated to corresponding image information and ground station control instruction, and send monitor with described this image information, and control terminal is sent in the ground station control instruction.
Under the situation of machine-carried wireless broadband communication system according to technical solutions of the utility model at the airborne multiway images needs of high speed transmitted in both directions, based on the orthogonal frequency division multiplex technique is the transmitted in both directions that core realizes the WiMAX image, it has under geography complicated and changeable, orographic condition the WiMAX multiway images is carried out reliable and stable transmitted in both directions, and the scope of application is expanded greatly.
In addition, this programme can be realized the transmitted in both directions of image and control command, not only realizes the transmission of image, can also control airborne equipment, is convenient to better carry out data acquisition and its state of flight is controlled.
Above-mentioned machine-carried wireless broadband communication system, described COFDM modulation module is upper to comprise the encoder that the image information of will be modulated or image of video data are carried out compressed encoding, correspondingly, the next decoder of decoding that comprises of Dui Ying COFDM demodulation module to after the corresponding demodulates information.
Above-mentioned machine-carried wireless broadband communication system, described encoder adopt MPEGII, MPEGIV, the encoder of standard H.264.
Above-mentioned machine-carried wireless broadband communication system, described COFDM modulation module prime also comprises the encrypting module of encrypting to the adjustment data, correspondingly, described COFDM demodulation module subordinate is provided with corresponding deciphering module.
Described video capture device comprises the video camera that is used to extract live video information, extract the thermal infrared imager of site infrare image information and extract the ultraviolet thermal imager of on-the-spot ultraviolet image information.
Being provided with the radiofrequency signal filtering that is used for that reception antenna is received between described receiver and reception antenna amplifies to improve the filtering amplification module of signal strength signal intensity.
Above-mentioned machine-carried wireless broadband communication system describedly can also be broadcast to a distant place by trunk module by the information after the demodulation, and trunk module is the COFDM trunk module.
Above-mentioned machine-carried wireless broadband communication system, the carrier of described airborne equipment are fixed-wing unmanned aerial vehicle, rotor depopulated helicopter, duct formula unmanned plane or people's carrier are arranged.
Described transmitting antenna and reception antenna are omnidirectional antenna.
(4) description of drawings
Below in conjunction with Figure of description the technical solution of the utility model is further described, makes those skilled in the art better understand the utility model, wherein:
Fig. 1 is the structured flowchart of airborne equipment among the utility model embodiment.
Fig. 2 is the structured flowchart of earth station equipment.
Among the figure: 1, video camera, 2, thermal infrared imager, 3, the ultraviolet imagery instrument, 4, the multiway images encoder, 5, encrypting module, 6, the COFDM modulation module, 7, transmitter, 8, transmitting antenna, 9, reception antenna, 10, the filtering amplification module, 11, receiver, 12, the COFDM demodulation module, 13, deciphering module, 14, decoder, 15, monitor, 16, trunk module, 17, video camera, 18, encoder, 19, the backstage industrial computer, 20, the gondola joystick, 21, encrypting module, 22, the COFDM modulation module, 23, transmitter, 24, transmitting antenna, 25, reception antenna, 26, the filtering amplification module, 27, receiver, 28, the COFDM demodulation module, 29, deciphering module, 30, decoder, 31, monitor, 32, trunk module.
(5) embodiment
Below the technical solution of the utility model is made exemplary illustration:
With reference to the attached Fig. 1 and 2 of explanation, present embodiment machine-carried wireless broadband communication system, comprise the airborne equipment and the earth station equipment that connect by wireless telecommunications, wherein airborne equipment comprises airborne transmitting equipment and airborne receiving equipment, described earth station equipment comprises ground station's transmitter and ground station's receiving equipment
Described airborne transmitting equipment comprises:
Video capture device is used to gather the first required video data of line walking;
COFDM modulation module 6 is used for described first video data is encoded with the COFDM technology, to obtain to be fit to first data-signal of wireless channel transmission;
Transmitter 7 and transmitting antenna 8 become first of default first frequency to transmit the described first data-signal frequency conversion and to aerial emission;
Described ground station receiving equipment comprises:
Described ground station transmitter comprises:
Described airborne receiving equipment comprises:
Receiver 11 and reception antenna 9 are used to receive described second and transmit and its frequency conversion is become second intermediate-freuqncy signal;
COFDM demodulation module 12 is used for described second intermediate-freuqncy signal is demodulated to corresponding image information and ground station control instruction, and send monitor 15 with described this image information, and control terminal is sent in the ground station control instruction.
In order to reduce the occupancy of channel width, perhaps narrower relatively large data of Channel Transmission of dedicated bandwidth, described COFDM modulation module is upper to comprise the encoder that the image information of will be modulated or image of video data are carried out compressed encoding, correspondingly, the next decoder of decoding that comprises of Dui Ying COFDM demodulation module to after the corresponding demodulates information.
Described encoder adopts MPEGII, MPEGIV, the encoder of standard H.264; those skilled in the art also can select the encoder/decoder of diminishing of other or lossless image data compression coding/decoding standard according to eigen for use, this according to the characteristic of technological means that this programme adopts that select with equivalents this programme technical characterictic or obviously mode of texturing also should fall within the protection range of the present utility model.
In order to improve the signal safety of transmission, described COFDM modulation module prime also comprises the encrypting module of encrypting 5,21 to the adjustment data, and correspondingly, described COFDM demodulation module subordinate is provided with corresponding deciphering module 13,29.
In order to obtain the information of patrolling and examining widely, described video capture device comprises the video camera 1 that is used to extract live video information, extract the thermal infrared imager 2 of site infrare image information and extract the ultraviolet thermal imager 3 of on-the-spot ultraviolet image information.
In order to improve the transmittability of signal, be provided with the radiofrequency signal filtering that is used for that reception antenna is received between described receiver and reception antenna and amplify to improve the filtering amplification module of signal strength signal intensity.
Certainly, if necessary, describedly can also be broadcast to a distant place by trunk module, be convenient to expand its application by the information after the demodulation.
As required, those skilled in the art is free to select the carrier of described airborne equipment to be fixed-wing unmanned aerial vehicle, rotor depopulated helicopter, duct formula unmanned plane or people's carrier is arranged.
Mutual for the ease of airborne equipment and earth station equipment, described transmitting antenna and reception antenna are omnidirectional antenna.Nature in order to improve emission/receiving efficiency, also can adopt directional antenna.
Claims (9)
1. machine-carried wireless broadband communication system, comprise the airborne equipment and the earth station equipment that connect by wireless telecommunications, wherein airborne equipment comprises airborne transmitting equipment and airborne receiving equipment, and described earth station equipment comprises ground station's transmitter and ground station's receiving equipment, it is characterized in that:
Described airborne transmitting equipment comprises:
Video capture device is used to gather the first required video data of line walking;
COFDM modulation module (6) is used for described first video data is encoded with the COFDM technology, to obtain to be fit to first data-signal of wireless channel transmission;
Transmitter (7) and transmitting antenna (8) become first of default first frequency to transmit the described first data-signal frequency conversion and to aerial emission;
Described ground station receiving equipment comprises:
Receiver (27) and reception antenna (25) are used to receive described first and transmit, and with this signal frequency conversion to the first intermediate-freuqncy signal;
COFDM demodulation module (28) is used for described first intermediate-freuqncy signal is demodulated first video data of its correspondence;
Monitor (31) is used to show described first video data;
Described ground station transmitter comprises:
Video camera (17) obtains ground station's image information;
COFDM modulation module (22) is used for described image information and ground station control instruction are become to be fit to second data-signal that wireless channel transmits with the COFDM technological adjustment;
Transmitter (23) and transmitting antenna (24) are used for becoming second of default second frequency to transmit to aerial emission the described second data-signal frequency conversion;
Described airborne receiving equipment comprises:
Receiver (11) and reception antenna (9) are used to receive described second and transmit and its frequency conversion is become second intermediate-freuqncy signal;
COFDM demodulation module (12) is used for described second intermediate-freuqncy signal is demodulated to corresponding image information and ground station control instruction, and send monitor (15) with described this image information, and control terminal is sent in the ground station control instruction.
2. machine-carried wireless broadband communication system according to claim 1, it is characterized in that: described COFDM modulation module is upper to comprise the encoder that the image information of will be modulated or image of video data are carried out compressed encoding, correspondingly, the next decoder of decoding that comprises of Dui Ying COFDM demodulation module to after the corresponding demodulates information.
3. machine-carried wireless broadband communication system according to claim 2 is characterized in that: described encoder adopts MPEGII, MPEGIV, the encoder of standard H.264.
4. machine-carried wireless broadband communication system according to claim 3, it is characterized in that: described COFDM modulation module prime also comprises the encrypting module of encrypting to the adjustment data, correspondingly, described COFDM demodulation module subordinate is provided with corresponding deciphering module.
5. machine-carried wireless broadband communication system according to claim 1 is characterized in that: described video capture device comprises video camera (1), thermal infrared imager (2) that extracts the site infrare image information that is used to extract live video information and the ultraviolet thermal imager (3) that extracts on-the-spot ultraviolet image information.
6. machine-carried wireless broadband communication system according to claim 1 is characterized in that: be provided with the radiofrequency signal filtering that is used for that reception antenna is received between described receiver and reception antenna and amplify to improve the filtering amplification module of signal strength signal intensity.
7. according to the described machine-carried wireless broadband communication system of one of claim 1 to 6, it is characterized in that: describedly can also be broadcast to a distant place by trunk module, and trunk module is the COFDM trunk module by the information after the demodulation.
8. machine-carried wireless broadband communication system according to claim 7 is characterized in that: the carrier of described airborne equipment is fixed-wing unmanned aerial vehicle, rotor depopulated helicopter, duct formula unmanned plane or people's carrier is arranged.
9. machine-carried wireless broadband communication system according to claim 7 is characterized in that: described transmitting antenna and reception antenna are omnidirectional antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202251761U CN201491184U (en) | 2009-08-25 | 2009-08-25 | Airborne wireless broadband communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202251761U CN201491184U (en) | 2009-08-25 | 2009-08-25 | Airborne wireless broadband communication system |
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| CN201491184U true CN201491184U (en) | 2010-05-26 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547284A (en) * | 2012-01-05 | 2012-07-04 | 天津师范大学 | Portable wireless high-definition image transmission system and method thereof |
| CN103501424A (en) * | 2013-09-25 | 2014-01-08 | 成都航天通信设备有限责任公司 | TDMA+TDD model high-speed image transmitting 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 |
| CN104219492A (en) * | 2013-11-14 | 2014-12-17 | 成都时代星光科技有限公司 | Image transmission system of unmanned aerial vehicle |
| CN107547866A (en) * | 2017-07-21 | 2018-01-05 | 合肥未来计算机技术开发有限公司 | A kind of engineering picture acquisition system based on GPS positioning technology |
-
2009
- 2009-08-25 CN CN2009202251761U patent/CN201491184U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102547284A (en) * | 2012-01-05 | 2012-07-04 | 天津师范大学 | Portable wireless high-definition image transmission system and method thereof |
| CN103501424A (en) * | 2013-09-25 | 2014-01-08 | 成都航天通信设备有限责任公司 | TDMA+TDD model high-speed image transmitting system, communication control method and working method |
| CN103501424B (en) * | 2013-09-25 | 2017-03-29 | 成都航天通信设备有限责任公司 | TDMA+TDD standard high speed image transmission systems and communication control method and method of work |
| CN104219492A (en) * | 2013-11-14 | 2014-12-17 | 成都时代星光科技有限公司 | Image transmission system of unmanned aerial vehicle |
| CN104219492B (en) * | 2013-11-14 | 2017-12-15 | 成都时代星光科技有限公司 | Unmanned plane image delivering system |
| 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 |
| CN107547866A (en) * | 2017-07-21 | 2018-01-05 | 合肥未来计算机技术开发有限公司 | A kind of engineering picture acquisition system based on GPS positioning technology |
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Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: SHANDONG RESEARCH INST. OF ELECTRIC POWER Effective date: 20130506 Owner name: SHANDONG RESEARCH INST. OF ELECTRIC POWER Effective date: 20130506 |
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Free format text: CORRECT: ADDRESS; FROM: 250002 JINAN, SHANDONG PROVINCE TO: 100000 XICHENG, BEIJING |
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Effective date of registration: 20130506 Address after: 100000 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: Shandong Research Inst. of Electric Power Address before: 250002 Shandong Electric Power Research Institute, No. 500 South Second Ring Road, Shizhong District, Ji'nan, Shandong Patentee before: Shandong Research Inst. of Electric Power |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100526 Termination date: 20180825 |
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| CF01 | Termination of patent right due to non-payment of annual fee |