CN109556829A - A kind of internal wave of ocean acoustics real-time detection method based on line spectrum identification - Google Patents
A kind of internal wave of ocean acoustics real-time detection method based on line spectrum identification Download PDFInfo
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- CN109556829A CN109556829A CN201910091683.9A CN201910091683A CN109556829A CN 109556829 A CN109556829 A CN 109556829A CN 201910091683 A CN201910091683 A CN 201910091683A CN 109556829 A CN109556829 A CN 109556829A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
- G01H3/04—Frequency
Abstract
The invention discloses a kind of internal wave of ocean acoustics real-time detection methods based on line spectrum identification, this method uses the propeller of setting speed as sound source, propeller noise is passively acquired using standard hydrophone 8301, based on propeller line spectrum recognizer, in conjunction with marine acoustics physical features, internal wave of ocean real-time detection is realized.This method sends propeller noise to the standard hydrophone for being fixed on seabed by the propeller of setting speed, by taking envelope value to acquisition signal progress band logical and low-pass filtering, extract demon spectrum, complete line spectrum identification, and compared with the revolution speed of propeller of setting, it is lasting to track, once the jump that notes abnormalities, it is transferred to secondary identification, complete interior wave real-time detection and is alarmed.This method step is simple, replaces sound source using propeller, low in cost, is suitble to any waters, is with a wide range of applications.
Description
Technical field
The invention belongs to internal wave of ocean monitoring technical fields, specifically using propeller noise line spectrum recognizer to monitoring
The method that line spectrum known to the real-time tracking of sea area realizes internal wave of ocean detection and alarm.
Background technique
As a kind of extremely universal ocean natural phenomena, internal wave of ocean utilizes ocean military activity and marine resources and opens
Hair has extremely serious destructiveness, is the research hotspot of domestic and international marine field at present.Military aspect, internal wave of ocean cause sea
The variation of the temperature surfaces such as ocean and isopycnic surface will affect the intensity of acoustical signal in ocean, propagation distance and direction, increase underwater
The difficulty of communication and target acquisition.Large amplitude interior estimates can make isopycnic surface that dipping and heaving quickly occur, and increase submarine boat
Row resistance keeps elevator not steerable, or even causes devastating disasters such as " cliffs of displacement ".In terms of civil engineering, internal wave of ocean can be right
Offshore oil drilling and exploitation etc. have an immense impact on, the strong reversing current generated, can significantly forcibly changing in a short time
Operation ship ship to.Therefore, realize that autonomous real-time detection is very urgent and necessary to internal wave of ocean entirely in important and Sensitive sea area.
The common non-acoustic detecting instrument of internal wave of ocean mainly has anchor system wave gage array both at home and abroad at present, walks boat towing instrument,
Neutral float detection and satellite remote sensing, can not accomplish the function of finding interior wave and early warning in advance.Huge et al. the patent (application number of woods
201110168519.7) interior wave detection is realized by the way of acoustical signal transmitting-receiving separation, but is only defined in nonlinear internal wave, no
It is suitble to practical application.The patent (application number 201110312123.5) for applying state congruence people cuts open ocean layering using phased array sonar
Face sound reflecting intensity and flow velocity are analyzed.There is equipment valuableness in above method, lay complexity, calculation amount used in processing method
It greatly, and can not wave in autonomous classification in real time.
The spectrum discrimination of Demon spectral line is as classical underwater target detection method, by underwater regular mechanical oscillation
The spectral line for being produced as line feature on spectrogram with propeller completes the identification of target, is widely used.It is Canadian
The expert system INTERSENSOR of ship-radiated noise, Britain are developed on the basis of the online spectrum discrimination of J.N.Maksy et al.
Sheppard and Gent using nerual network technique develop passive sonar systematicalian system, China Li Qihu et al. is developed
" EXPLORE " target identification expert system.
Summary of the invention
In view of this, the present invention proposes a kind of internal wave of ocean acoustics real-time detection method based on line spectrum identification, using spiral shell
Characteristic signal of the paddle as wave in detecting is revolved, by the revolution speed of propeller of setting, receives acoustical signal using standard hydrophone, according to
Interior wave real-time tracking detection is completed in line spectrum identification, and device structure is simple, and at low cost, Effect on Detecting is good.
Mechanism of the invention: using propeller as signal source, setting constant rotational speed, real-time using standard hydrophone 8301
The acoustical signal in passive acquisition monitoring sea area, carries out demon spectral line spectrum discrimination real-time tracking propeller shaft frequency, when internal wave of ocean generates
When, monitoring sea area Acoustic channel can generate exception, and abnormal bounce will occur in propeller shaft frequency, complete after being judged as interior wave by tracking
Assault police report at interior wave.
Testing index of the invention: wave distance range is 5km in detectable；Detectable Internal wave amplitude is greater than 25m.
Internal wave of ocean acoustics real-time detection method of the present invention based on line spectrum identification, steps are as follows:
(1) propeller is placed in ocean platform, standard hydrophone 8301 is put in seabed；
(2) propeller generates noise, the passive acquisition monitoring in real time of standard hydrophone 8301 according to program setting revolving speed uniform rotation
The acoustical signal in sea area generatesSequence signal；
(3) right respectively using the bandpass filter being pre-designedIt is filtered, obtains data group data1, data2,
Data3., unified completion low-pass filter filtering take envelope processing, and weighted superposition is demon spectrum；
(4) demon is composed respectively by line spectrum separation and line spectrum purification and carries out extraction of line spectrum, and use greatest common divisor extraction method
Line spectrum axis frequency is extracted, the axis frequency of propeller generation is obtained, and result is temporally shown in upper computer software interface, completes prison
Survey wave real-time monitoring in sea area；
(5) if monitoring sea area occur in wave, ocean acoustic channel will change, the intensity for the axis frequency that propeller generates and when occurring
Between will will appear change, axis frequency can also shift, tracked according to certain time, after being judged as same interior wave, complete in wave come
Assault police report.
Detailed description of the invention
Fig. 1 is the connection figure of the internal wave of ocean real-time monitoring system based on line spectrum identification；
Fig. 2 is the internal wave of ocean line spectrum recognition detection method flow diagram based on line spectrum identification；
1 is antenna in figure, and 2 be surface buoy, and 3 be load composite rope, and 4 be standard hydrophone 8301,5 be anchoring part, and 6 be spiral
Paddle.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Characteristic signal of the present invention using propeller as wave in detecting uses standard by the revolution speed of propeller of setting
Hydrophone receives acoustical signal, completes interior wave real-time tracking detection according to line spectrum identification.
Specific step is as follows for internal wave of ocean real-time detection method based on line spectrum identification:
(1) propeller 6 is placed in ocean platform, standard hydrophone 83014 is put in seabed；
(2) propeller 6 generates noise according to program setting revolving speed uniform rotation, and standard hydrophone 83014 in real time supervise by passive acquisition
The acoustical signal in sea area is surveyed, is generatedSequence signal；
(3) right respectively using the bandpass filter being pre-designedIt is filtered, obtains data group data1, data2,
Data3., unified completion low-pass filter filtering take envelope processing, and weighted superposition is demon spectrum；
(4) demon is composed respectively by line spectrum separation and line spectrum purification and carries out extraction of line spectrum, and use greatest common divisor extraction method
Line spectrum axis frequency is extracted, the axis frequency of the generation of propeller 6 is obtained, and result is temporally shown in upper computer software interface, completes
Monitor wave real-time monitoring in sea area；
(5) if interior wave occurs in monitoring sea area, ocean acoustic channel will change, the intensity and appearance of the axis frequency that propeller 6 generates
Time will will appear change, and axis frequency can also shift, be tracked according to certain time, after being judged as same interior wave, complete interior wave
Come the report that assaults police.
The line spectrum separation, line spectrum purification and greatest common divisor extraction method use existing digital signal processing algorithm.
As shown in Figure 1, determining the length of load composite rope 3 before laying, standard hydrophone 83014 is fixed on sea bed,
Propeller 6 depends on offshore platform, and system work process is as follows:
1. by propeller 6 according to program arrange it is regular to subsurface buoy emit acoustical signal, standard hydrophone 83014 by with sea
Water resonance carries out acoustical signal data pickup.
2. data are transmitted to surface buoy 2 by load composite rope 3, surface buoy 2 passes through iridium satellite communication module and antenna
Data back is returned monitoring platform by 1, carries out Data Management Analysis by platform.
3. if what platform completed interior wave by means of the present invention attacks early warning wave in occurring.
Claims (3)
1. a kind of internal wave of ocean acoustics real-time detection method based on line spectrum identification, it is characterised in that include the following steps:
(1) propeller (6) is placed in ocean platform, standard hydrophone 8301(4) it is put in seabed；
(2) propeller (6) generates noise, standard hydrophone 8301(4 according to program setting revolving speed uniform rotation) it passively adopts in real time
The acoustical signal in monitor set sea area generatesSequence signal；
(3) right respectively using the bandpass filter being pre-designedIt is filtered, obtains data group data1, data2,
Data3., unified completion low-pass filter filtering take envelope processing, and weighted superposition is demon spectrum；
(4) demon is composed respectively by line spectrum separation and line spectrum purification and carries out extraction of line spectrum, and use greatest common divisor extraction method
Line spectrum axis frequency is extracted, obtains the axis frequency of propeller (6) generation, and result is temporally shown in upper computer software interface, it is complete
At wave real-time monitoring in monitoring sea area；
(5) if monitoring sea area occur in wave, ocean acoustic channel will change, and the intensity for the axis frequency that propeller (6) generates and go out
Change will be will appear between current, axis frequency can also shift, track according to certain time, after being judged as same interior wave, in completion
Wave is come the report that assaults police.
2. a kind of internal wave of ocean acoustics real-time detection method based on line spectrum identification according to claim 1, feature exist
In: wave distance range is 5km in detectable.
3. a kind of internal wave of ocean acoustics real-time detection method based on line spectrum identification according to claim 1, feature exist
In: detectable Internal wave amplitude is greater than 25m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910091683.9A CN109556829B (en) | 2019-01-30 | 2019-01-30 | Line spectrum identification-based real-time detection method for ocean internal wave acoustics |
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| CN201910091683.9A CN109556829B (en) | 2019-01-30 | 2019-01-30 | Line spectrum identification-based real-time detection method for ocean internal wave acoustics |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024207A (en) * | 2019-11-26 | 2020-04-17 | 中国船舶重工集团有限公司第七一0研究所 | Automatic detection and judgment method for vector hydrophone line spectrum |
| CN112083428A (en) * | 2020-09-02 | 2020-12-15 | 杭州电子科技大学 | Marine internal wave early warning monitoring method based on acoustic vector field processing |
| CN113406006A (en) * | 2021-06-11 | 2021-09-17 | 中国海洋大学 | Method for detecting amplitude of second-mode convex-type internal isolated wave |
| WO2023102959A1 (en) * | 2021-12-06 | 2023-06-15 | 中国人民解放军国防科技大学 | Laboratory internal wave intelligent measurement system |
-
2019
- 2019-01-30 CN CN201910091683.9A patent/CN109556829B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024207A (en) * | 2019-11-26 | 2020-04-17 | 中国船舶重工集团有限公司第七一0研究所 | Automatic detection and judgment method for vector hydrophone line spectrum |
| CN111024207B (en) * | 2019-11-26 | 2022-09-02 | 中国船舶重工集团有限公司第七一0研究所 | Automatic detection and judgment method for vector hydrophone line spectrum |
| CN112083428A (en) * | 2020-09-02 | 2020-12-15 | 杭州电子科技大学 | Marine internal wave early warning monitoring method based on acoustic vector field processing |
| CN112083428B (en) * | 2020-09-02 | 2023-12-01 | 杭州电子科技大学 | Ocean internal wave early warning and monitoring method based on acoustic vector field processing |
| CN113406006A (en) * | 2021-06-11 | 2021-09-17 | 中国海洋大学 | Method for detecting amplitude of second-mode convex-type internal isolated wave |
| CN113406006B (en) * | 2021-06-11 | 2022-07-01 | 中国海洋大学 | Method for detecting amplitude of second-mode convex-type internal isolated wave |
| WO2023102959A1 (en) * | 2021-12-06 | 2023-06-15 | 中国人民解放军国防科技大学 | Laboratory internal wave intelligent measurement system |
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Effective date of registration: 20210112 Address after: Room 7-603a, China artificial intelligence Town, 1818-2 Wenyi West Road, Yuhang street, Yuhang District, Hangzhou, Zhejiang 311100 Patentee after: HANGZHOU HAIXUN TECHNOLOGY Co.,Ltd. Address before: 310018 No. 2 street, Xiasha Higher Education Zone, Hangzhou, Zhejiang Patentee before: HANGZHOU DIANZI University |
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