CN107678031B - Underwater positioning module with identification information - Google Patents
Underwater positioning module with identification information Download PDFInfo
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- CN107678031B CN107678031B CN201710822470.XA CN201710822470A CN107678031B CN 107678031 B CN107678031 B CN 107678031B CN 201710822470 A CN201710822470 A CN 201710822470A CN 107678031 B CN107678031 B CN 107678031B
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- identification information
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- frequency
- underwater
- signal generator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/523—Details of pulse systems
- G01S7/524—Transmitters
Abstract
The invention belongs to the technical field of avionics, and particularly relates to an underwater positioning module with identification information, which is used for searching a flight protection recorder. In the ocean, due to noise generated by waves, fishes, ships and the like, the sound field in the ocean is extremely disordered, and underwater communication becomes very difficult. The invention provides an underwater positioning device with identification information, which adopts linear frequency modulation signals to have narrower pulse width and higher peak power after matched filtering and compression processing, thereby not only improving the distance resolution, but also having better anti-jamming capability and leading the signal transmission distance to be farther.
Description
Technical Field
The invention belongs to the technical field of avionics, and particularly relates to an underwater positioning module with identification information, which is used for searching a flight protection recorder.
Background
In the ocean, due to noise generated by waves, fishes, ships and the like, a sound field in the ocean is extremely disordered, underwater communication becomes very difficult, mainly due to multipath effect and time-varying effect of channels, narrow available frequency bandwidth and serious signal attenuation, and particularly in long-distance transmission. Among various waves propagated in water, attenuation of longitudinal waves (sound waves) is minimized, so that sonar technology and underwater acoustic information transmission technology are widely adopted and paid attention to, underwater wireless communication widely uses acoustic communication technology, the underwater acoustic communication technology has the advantages of long communication distance, high communication reliability and the like, and the acoustic communication technology is widely applied to the field of underwater wireless communication in shallow sea and deep sea. At present, most of people use underwater positioning beacons which transmit sonar signals with fixed frequency (37.5 kHz) every second to carry out target positioning. However, the single-frequency signal has many limitations when performing underwater communication, such as limited available bandwidth and easy interference from noisy environment.
Disclosure of Invention
The invention provides an underwater positioning device with identification information, which adopts linear frequency modulation signals to have narrower pulse width and higher peak power after matched filtering and compression processing, thereby not only improving the distance resolution, but also having better anti-jamming capability and leading the signal transmission distance to be farther.
The underwater positioning module with the identification information is used for searching a flight protection recorder and comprises a signal generator unit, an electro-acoustic conversion unit and a sound signal sending unit which are sequentially connected, wherein the signal generator unit generates a linear frequency modulation signal, a frequency point acquisition unit is connected between the signal generator unit and the electro-acoustic conversion unit, the linear frequency modulation signal is subjected to limited frequency point acquisition through the frequency point acquisition unit, and sound signals with different frequencies are sent out through the sound signal sending unit after passing through the electro-acoustic conversion unit.
And the signal generator unit performs matched filtering and compression processing on the generated linear frequency modulation signal.
The device realizes remote transmission through selecting frequency.
And setting the collection points of the frequency point collection unit according to the search preset conditions, wherein the more the collected frequency points are, the larger the carried information amount is.
During searching, the location of the flight protection recorder is determined according to the captured sound frequency information.
Signals of different frequencies are marked.
Has the advantages that:
1) improve the anti-interference capability of signals to make the transmission distance longer
The invention adopts the linear frequency modulation signal to have narrower pulse width and higher peak power after matched filtering and compression processing, thus not only improving the distance resolution, but also having better anti-jamming capability and leading the signal transmission distance to be farther.
2) More information can be carried according to different requirements
The invention carries out limited frequency point collection on linear frequency modulation signals according to different requirements, and when the frequency difference is large, 1, 0 or other information in the digital signals is represented by using different frequency. When the more frequency points are collected, the larger the amount of information carried.
Drawings
Fig. 1 is a schematic diagram of the operation process of the underwater positioning module with identification information of the invention.
Detailed Description
The present invention is described in further detail below.
The invention relates to an underwater positioning device with identification information, which comprises a signal generator unit, a frequency point acquisition unit, an electroacoustic conversion unit, an acoustic signal sending unit and a structural component.
The invention adopts a signal generator to generate a linear frequency modulation signal, carries out limited frequency point acquisition on the linear frequency modulation signal through a frequency point acquisition unit, carries out electro-acoustic conversion on the acquired frequency points, represents different information according to different frequencies, carries larger information amount when more frequency points are acquired, and then sends out an acoustic signal through an acoustic signal sending unit.
Claims (4)
1. The utility model provides a take identification information's orientation module under water for the search of flight protection recorder, this orientation module under water is including the signal generator unit, the electroacoustic transducer unit and the acoustic signal sending unit that connect gradually, its characterized in that: the signal generator unit generates a linear frequency modulation signal, a frequency point acquisition unit is connected between the signal generator unit and the electroacoustic conversion unit, the linear frequency modulation signal is subjected to limited frequency point acquisition through the frequency point acquisition unit, the acquisition point number of the frequency point acquisition unit is set according to search preset conditions, and sound signals with different frequencies are transmitted through the electroacoustic conversion unit; the remote transmission is realized by selecting the frequency; during searching, the location of the flight protection recorder is determined according to the captured sound frequency information.
2. The underwater locating module with identification information of claim 1, wherein: and the signal generator unit performs matched filtering and compression processing on the generated linear frequency modulation signal.
3. The underwater locating module with identification information of claim 1, wherein: the more frequency points are collected, the larger the amount of information carried.
4. The underwater locating module with identification information of claim 1, wherein: signals of different frequencies are marked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822470.XA CN107678031B (en) | 2017-09-13 | 2017-09-13 | Underwater positioning module with identification information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710822470.XA CN107678031B (en) | 2017-09-13 | 2017-09-13 | Underwater positioning module with identification information |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107678031A CN107678031A (en) | 2018-02-09 |
| CN107678031B true CN107678031B (en) | 2020-06-30 |
Family
ID=61135298
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710822470.XA Active CN107678031B (en) | 2017-09-13 | 2017-09-13 | Underwater positioning module with identification information |
Country Status (1)
| Country | Link |
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| CN (1) | CN107678031B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334473A (en) * | 2008-08-04 | 2008-12-31 | 厦门大学 | Deep water net cage fish school status remote real time monitoring instrument based on acoustic multi-beam |
| CN105953079A (en) * | 2016-07-01 | 2016-09-21 | 北京华科合创科技发展有限公司 | Pipe cleaning ball positioning system for oil and gas pipeline |
| CN206249096U (en) * | 2016-12-06 | 2017-06-13 | 北京臻迪科技股份有限公司 | A kind of underwater robot |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2648689B2 (en) * | 1994-11-30 | 1997-09-03 | 防衛庁技術研究本部長 | Underwater sound source direction detection device |
-
2017
- 2017-09-13 CN CN201710822470.XA patent/CN107678031B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101334473A (en) * | 2008-08-04 | 2008-12-31 | 厦门大学 | Deep water net cage fish school status remote real time monitoring instrument based on acoustic multi-beam |
| CN105953079A (en) * | 2016-07-01 | 2016-09-21 | 北京华科合创科技发展有限公司 | Pipe cleaning ball positioning system for oil and gas pipeline |
| CN206249096U (en) * | 2016-12-06 | 2017-06-13 | 北京臻迪科技股份有限公司 | A kind of underwater robot |
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| Publication number | Publication date |
|---|---|
| CN107678031A (en) | 2018-02-09 |
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