CN103308885A - Method and system for searching buoys on the basis of OFDM (Orthogonal Frequency Division Multiplexing) underwater acoustic signals - Google Patents
Method and system for searching buoys on the basis of OFDM (Orthogonal Frequency Division Multiplexing) underwater acoustic signals Download PDFInfo
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- CN103308885A CN103308885A CN2013101648426A CN201310164842A CN103308885A CN 103308885 A CN103308885 A CN 103308885A CN 2013101648426 A CN2013101648426 A CN 2013101648426A CN 201310164842 A CN201310164842 A CN 201310164842A CN 103308885 A CN103308885 A CN 103308885A
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Abstract
The invention provides a method and a system for searching buoys on the basis of OFDM underwater acoustic signals. The method includes the following steps: a hand-held remote control device is utilized to remotely control an underwater sound generation device to transmit an OFDM underwater acoustic signal; after the OFDM underwater acoustic signal is received by an underwater sound receiving device, a buoy is separated from a searched object, and carries the underwater sound receiving device to float upward; after the buoy floats to the water surface, the underwater sound receiving device transmits the positional coordinates of the buoy to the hand-held remote control device; and after the coordinate position information is received by the hand-held remote control device, the buoy can be salvaged at the corresponding position specified by the coordinates. The system implementing the method comprises the hand-held remote control device, the underwater sound generation device and the underwater sound receiving device, and the hand-held remote control device is connected with the underwater sound generation device and the underwater sound receiving device. Since the invention judges the position of the searched object according to the position of the buoy, coordinate information is transmitted via a wireless channel rather than an underwater acoustic channel, and because a GPRS (General Packet Radio Service) module is utilized, the reliability of the coordinate position is greatly enhanced.
Description
Technical field
The invention belongs to the water sound communication technique field, especially a kind of method and system of buoy being searched based on the OFDM underwater sound signal.
Background technology
Because underwater sound communication fast development in recent years makes the test of oceanographic research and seabed obtain great advance with application.Yet operation has certain risk under the sea of equipment, and especially the equipment for moulding just carries out performance test under water, in case the fault that appearance can't be returned just needs us to salvage.So just seem especially important with the equipment of Yu Haiyang positioning system being installed because positional information this be the compass that we salvage search.
At present, search many positions that transmit and receive to determine searching target by underwater sound signal under water, owing to its emission with return receiving position information and all need through underwater acoustic channel, so be subjected to channel effect more serious.And underwater communication is very difficult, mainly be because the multipath effect of channel, the time change effect, available bandwidth is narrow, signal attenuation is serious etc. influence.
Summary of the invention
Outside the deficiency that exists in the problems referred to above, the invention provides a kind of method and system of buoy being searched based on the OFDM underwater sound signal that adopt water sound communication technique and mechanical buoy to judge the searching target position.
For achieving the above object, the invention provides a kind of method of buoy being searched based on the OFDM underwater sound signal, may further comprise the steps:
S1, by remote control handset Long-distance Control underwater sound generation equipment emission OFDM underwater sound signal;
S2, underwater sound receiving equipment after receiving the OFDM underwater sound signal, buoy with separated by searching target, and carry underwater sound receiving equipment and begin come-up;
S3, after buoy emerges, underwater sound receiving equipment sends to remote control handset with its position coordinates;
S4, after remote control handset receives co-ordinate position information, salvage to the relevant position of coordinate appointment.
Further, in step S1, remote control handset sends searching instruction to underwater sound generation equipment, sends the OFDM underwater sound signal after underwater sound generation equipment receives this instruction.
Further, in step S4, demonstrate the buoy coordinate position at LCD after receiving position coordinates in the remote control handset.
The present invention also provides a kind of enforcement system for carrying out said process, comprise remote control handset, underwater sound generation equipment and underwater sound receiving equipment, described remote control handset links to each other with described underwater sound receiving equipment with described underwater sound generation equipment successively, and described remote control handset is made of LCD display, wireless receiving sending module, keyboard and central processing module; Described underwater sound generation equipment is made of underwater sound generation module, wireless receiving module, central processing module and sonar equipment; Described underwater sound receiving equipment is made of underwater sound receiver module, wireless transmitter module, GPRS module and central processing module.
Further, in described remote control handset, described central processing module links to each other with described keyboard with described LCD display, described wireless receiving sending module respectively, described LCD display is used for displaing coordinate information and feedback key information, described wireless receiving sending module is used for reception and the transmission of wireless messages, described keyboard is used for signal and handheld device are operated, and described central processing module is used for the operation of the whole handheld device of control.
Further, in described underwater sound generation equipment, described central processing module links to each other with described sonar equipment with described underwater sound generation module, described wireless receiving module respectively, the signal output part of described underwater sound generation module links to each other with described sonar equipment by cable, with the reception of realization Remote signal and the transmission of OFDM underwater sound signal.
Further, in described underwater sound receiving equipment, described central processing module links to each other with described underwater sound receiver module, described wireless transmitter module and described GPRS module respectively, with the reception of realization OFDM underwater sound signal and the transmission of coordinate signal.
Further, described underwater sound receiving equipment and buoy are integral structure, described buoy be connected by searching target.
Compared with prior art, the present invention has the following advantages:
The present invention judges by the position of searching target by the position of buoy, because wireless channel transmission information is more than underwater acoustic channel safety, and wireless communication technology is also reliable than water sound communication technique, therefore, the present invention has avoided coordinate information to become the wireless channel transmission by the underwater acoustic channel transmission, again because utilized the GPRS module to increase the reliability of coordinate position greatly.
Description of drawings
Fig. 1 is the process flow diagram of the inventive method part;
Fig. 2 is the process flow diagram of Fig. 1 embodiment;
Fig. 3 is the structured flowchart of components of system as directed of the present invention.
The main element symbol description is as follows:
1-remote control handset 2-underwater sound generation equipment
3-underwater sound receiving equipment
Embodiment
As shown in Figure 1, the invention provides a kind of method of buoy being searched based on the OFDM underwater sound signal, may further comprise the steps:
S1, by remote control handset Long-distance Control underwater sound generation equipment emission OFDM underwater sound signal.
Concrete, remote control handset sends searching instruction to underwater sound generation equipment by its inner wireless transmission receiver module, sends the OFDM underwater sound signal in the underwater sound generation module at underwater sound generation equipment after the wireless receiving module in the underwater sound generation equipment receives this instruction.
S2, underwater sound receiving equipment after receiving the OFDM underwater sound signal, buoy with separated by searching target, and carry underwater sound receiving equipment and begin come-up.
Concrete, after the underwater sound receiver module of underwater sound receiving equipment under water received the OFDM underwater sound signal, the control buoy broke away from by searching target, and buoy carries underwater sound receiving equipment and begins come-up.
S3, after buoy emerges, underwater sound receiving equipment sends to remote control handset with its position coordinates.
Concrete, after buoy emerged, the wireless module in the underwater sound receiving equipment and GPRS locating module sent its position coordinates to remote control handset.
S4, after remote control handset receives co-ordinate position information, salvage to the relevant position of coordinate appointment.
Concrete, the wireless transmission receiver module in the remote control handset demonstrates the buoy coordinate position in LCD display after receiving position coordinates.
As shown in Figure 2, the invention provides a kind of method of buoy being searched based on the OFDM underwater sound signal, may further comprise the steps:
Hand-held remote control device sends remote signal to underwater sound generation equipment;
Underwater sound generation equipment judges whether to receive the remote signal that hand-held remote control device sends.If confirm to receive the remote signal that hand-held remote control device sends, underwater sound generation equipment sends the OFDM underwater sound signal to underwater sound receiving equipment so; If do not receive the remote signal that hand-held remote control device sends, so, hand-held remote control device sends remote signal to underwater sound generation equipment again;
Underwater sound receiving equipment judges whether to receive the OFDM underwater sound signal.If confirm to receive the OFDM underwater sound signal, so, buoy with separated by searching target, and carry underwater sound receiving equipment and begin come-up; If do not receive the OFDM underwater sound signal, so, underwater sound generation equipment sends the OFDM underwater sound signal to underwater sound receiving equipment again;
Judge whether buoy climbs up on top of the water.If buoy is determined to climb up on top of the water, so, underwater sound receiving equipment sends the coordinate information of buoy to remote control handset; On if buoy does not climb up on top of the water, so, check whether buoy does not separate fully with by searching target;
Demonstrate the buoy coordinate position behind the location coordinate information that receives buoy in the remote control handset.
As shown in Figure 3, the present invention also provides a kind of enforcement system for carrying out said process, comprises remote control handset 1, underwater sound generation equipment 2 and underwater sound receiving equipment 3, and remote control handset links to each other with underwater sound receiving equipment with underwater sound generation equipment successively.Remote control handset is made of LCD display, wireless receiving sending module, keyboard and central processing module, central processing module links to each other with keyboard with LCD display, wireless receiving sending module respectively, LCD display is used for displaing coordinate information and feedback key information, the wireless receiving sending module is used for reception and the transmission of wireless messages, keyboard is used for signal and handheld device are operated, and central processing module is used for the operation of the whole handheld device of control.
Underwater sound generation equipment is made of underwater sound generation module, wireless receiving module, central processing module and sonar equipment, central processing module links to each other with sonar equipment with underwater sound generation module, wireless receiving module respectively, the signal output part of underwater sound generation module links to each other with sonar equipment by cable, with the reception of realization Remote signal and the transmission of OFDM underwater sound signal.
Underwater sound receiving equipment is made of underwater sound receiver module, wireless transmitter module, GPRS module and central processing module.Central processing module links to each other with underwater sound receiver module, wireless transmitter module and GPRS module respectively, with the reception of realization OFDM underwater sound signal and the transmission of coordinate signal.Underwater sound receiving equipment and buoy are integral structure, buoy be connected by searching target.
At first, underwater sound generation equipment is placed on the bank or on the deck according to the search situation of reality, will choose the cable that is of convenient length afterwards its sonar is placed under water about 50 meters, the other end of cable is received the signal output part of underwater sound generation equipment.
Secondly, buoy and underwater sound receiving equipment are done in one, and buoy hooks by searching target with the form of hook, together place under water with buoy, and after random motion a period of time by searching target, be under the situation of stop motion, we are about to begin to search.
At last, operating personnel click the transmission key on the remote control handset keyboard, remote control handset center of inside processing module is controlled the wireless remote control signal that the wireless transmission receiver module emission underwater sound takes place after receiving key information, after this wireless remote control signal sends, the display remoting signal sends successful information on the LCD display, put the emission that stop key on the beating keyboard will stop remote signal this moment again, show the information that has stopped launching remote signal in LCD display accordingly.The wireless receiving module of underwater sound generation equipment is behind the wireless remote control signal that receives underwater sound generation, transmission sends the OFDM underwater sound signal and instructs to central processing module, central processing module is controlled underwater sound generation module again and is generated ofdm signal, this ofdm signal again by cable transmission in sonar equipment under water, and then form the OFDM underwater sound signal to diffusion emission under water.After underwater sound receiver module in the underwater sound receiving equipment receives the OFDM underwater sound signal, send the release buoy and instruct to central processing module, the disengaging of central processing module control buoy.After buoy is bubbled through the water column, wireless transmitter module in the underwater sound generation equipment sends the coordinate information that the GPRS module obtains, after remote control handset receives this information, demonstrate the coordinate position of this buoy in LCD display, go to search according to the position that provides, the clear key that at this moment can click on the remote control handset keyboard is known the LCD on-screen-display message.
The advantage of OFDM transmission mode in underwater sound communication is as follows:
1. by adding protection at interval, can effectively resist ISI, be applicable to and in the underwater acoustic channel with multipath and decline, carry out high speed data transfer.
2. the overlapped and quadrature of sub-channel spectra, the data rate to bandwidth ratio height.
3. can very simple realization frequency domain equalization, the frequency selective fading that causes with compensate for channel.
Only the above person only is preferred embodiment of the present invention, is familiar with the professional person of this skill such as. after understanding technological means of the present invention, natural energy is changed under instruction of the present invention according to the needs of reality.Therefore all equal variation and modifications of doing according to the present patent application claim once should still belong in the scope that patent of the present invention contains.
Claims (8)
1. method of buoy being searched based on the OFDM underwater sound signal may further comprise the steps:
S1, by remote control handset Long-distance Control underwater sound generation equipment emission OFDM underwater sound signal;
S2, underwater sound receiving equipment after receiving the OFDM underwater sound signal, buoy with separated by searching target, and carry underwater sound receiving equipment and begin come-up;
S3, after buoy emerges, underwater sound receiving equipment sends to remote control handset with its position coordinates;
S4, after remote control handset receives co-ordinate position information, salvage to the relevant position of coordinate appointment.
2. method of buoy being searched based on the OFDM underwater sound signal according to claim 1, it is characterized in that, in step S1, remote control handset sends searching instruction to underwater sound generation equipment, sends the OFDM underwater sound signal after underwater sound generation equipment receives this instruction.
3. method of buoy being searched based on the OFDM underwater sound signal according to claim 1 is characterized in that, in step S4, demonstrates the buoy coordinate position at LCD after receiving position coordinates in the remote control handset.
4. implement system for carrying out said process for one kind, comprise remote control handset, underwater sound generation equipment and underwater sound receiving equipment, described remote control handset links to each other with described underwater sound receiving equipment with described underwater sound generation equipment successively, and described remote control handset is made of LCD display, wireless receiving sending module, keyboard and central processing module; Described underwater sound generation equipment is made of underwater sound generation module, wireless receiving module, central processing module and sonar equipment; Described underwater sound receiving equipment is made of underwater sound receiver module, wireless transmitter module, GPRS module and central processing module.
5. according to the system shown in the claim 4, it is characterized in that, in described remote control handset, described central processing module links to each other with described keyboard with described LCD display, described wireless receiving sending module respectively, described LCD display is used for displaing coordinate information and feedback key information, described wireless receiving sending module is used for reception and the transmission of wireless messages, described keyboard is used for signal and handheld device are operated, and described central processing module is used for the operation of the whole handheld device of control.
6. according to the system shown in the claim 4, it is characterized in that, in described underwater sound generation equipment, described central processing module links to each other with described sonar equipment with described underwater sound generation module, described wireless receiving module respectively, the signal output part of described underwater sound generation module links to each other with described sonar equipment by cable, with the reception of realization Remote signal and the transmission of OFDM underwater sound signal.
7. according to the system shown in the claim 4, it is characterized in that, in described underwater sound receiving equipment, described central processing module links to each other with described underwater sound receiver module, described wireless transmitter module and described GPRS module respectively, with the reception of realization OFDM underwater sound signal and the transmission of coordinate signal.
8. according to the system shown in the claim 7, it is characterized in that described underwater sound receiving equipment and buoy are integral structure, described buoy be connected by searching target.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101648426A CN103308885A (en) | 2013-05-07 | 2013-05-07 | Method and system for searching buoys on the basis of OFDM (Orthogonal Frequency Division Multiplexing) underwater acoustic signals |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013101648426A CN103308885A (en) | 2013-05-07 | 2013-05-07 | Method and system for searching buoys on the basis of OFDM (Orthogonal Frequency Division Multiplexing) underwater acoustic signals |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445453A (en) * | 2018-03-15 | 2018-08-24 | 深圳市朗信浩通科技有限公司 | Localization method, device, system and computer storage media |
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| CN200976044Y (en) * | 2006-12-01 | 2007-11-14 | 哈尔滨工程大学 | Intelligent deep water answering machine |
| CN102571902A (en) * | 2010-12-14 | 2012-07-11 | 中国科学院声学研究所 | Wireless and underwater sound communication buoy |
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2013
- 2013-05-07 CN CN2013101648426A patent/CN103308885A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200976044Y (en) * | 2006-12-01 | 2007-11-14 | 哈尔滨工程大学 | Intelligent deep water answering machine |
| CN102571902A (en) * | 2010-12-14 | 2012-07-11 | 中国科学院声学研究所 | Wireless and underwater sound communication buoy |
Non-Patent Citations (2)
| Title |
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| 代文江: "水声遥控浮标解锁系统设计研究与实现", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108445453A (en) * | 2018-03-15 | 2018-08-24 | 深圳市朗信浩通科技有限公司 | Localization method, device, system and computer storage media |
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Owner name: QINGDAO HAOXU GUANGHUA MARINE TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: BEIJING INDUSTRY UNIVERSITY Effective date: 20141106 |
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Free format text: CORRECT: ADDRESS; FROM: 100124 CHAOYANG, BEIJING TO: 266111 QINGDAO, SHANDONG PROVINCE |
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Effective date of registration: 20141106 Address after: 266111 A1, building A, Qingdao District, Industrial Technology Research Institute, 17 Pine Road, Qingdao hi tech Zone, Shandong, 2 Applicant after: Qingdao Haoxu Guanghua Marine Technology Co., Ltd. Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Applicant before: Beijing University of Technology |
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Application publication date: 20130918 |