CN109490893A - The passive Frequency Adjustable formula underwater sound monitors positioning system - Google Patents
The passive Frequency Adjustable formula underwater sound monitors positioning system Download PDFInfo
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- CN109490893A CN109490893A CN201811481970.2A CN201811481970A CN109490893A CN 109490893 A CN109490893 A CN 109490893A CN 201811481970 A CN201811481970 A CN 201811481970A CN 109490893 A CN109490893 A CN 109490893A
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
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Classifications
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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
- G01S15/08—Systems for measuring distance only
- G01S15/10—Systems for measuring distance only using transmission of interrupted, pulse-modulated waves
-
- 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
- G01S15/08—Systems for measuring distance only
- G01S15/32—Systems for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
-
- 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
- G01S15/86—Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection
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- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention belongs to marine environmental monitorings, sonar detection technical field, and in particular to the passive Frequency Adjustable formula underwater sound monitors positioning system.Control system is received including bank station, buoy is monitored and positioning device, underwater hovering monitoring and positioning device；It includes listening array for acquiring 360 degree of fiber grating water of annular of underwater sound signal that the buoy, which is monitored and monitored with positioning device and the underwater hovering with positioning device,；It monitors to monitor with positioning device and the underwater hovering by the buoy and can be realized the water surface and underwater stereoscopicization monitoring and positioning with positioning device.And system of the present invention carries out frequency modulation using bank base software, monitors and positioning signal frequency range is adjustable sets, and monitoring signal frequency can not only meet the monitoring and positioning of specific objective frequency, but also the echo signal that can meet in wider frequency range detects.
Description
Technical field
The invention belongs to marine environmental monitorings, sonar detection technical field, and in particular to the passive Frequency Adjustable formula underwater sound is monitored
Positioning system.The system is monitored and is positioned underwater and the water surface the audible device by passive type, can be realized omnibearing stereo
Monitoring is a kind of Frequency Adjustable formula setting intrinsic frequency or the ocean water acoustic monitoring location instrument for limiting frequency range.
Background technique
Using buoy, subsurface buoy as mounting platform, it is external it is most commonly seen be that ambient sea noise monitors buoy, be mainly used for wind
Sudden and violent tide is monitored or the monitoring to specific objective.
The sonar buoy that the domestic military develops is mainly used for the underwater anti-submarine warfare of specific position, and sonar buoy is a kind of detection
Distance range is small, active detection, the higher device of limitation.It, can be to a variety of in recent years as optical fiber water listens the development of array
Target frequency signal remote probe, but need to be laid with submarine optical fiber cable, project amount is big, and installation and maintenance maintenance cost is expensive, and recycling is not
Just.
Main problem and reason of the existing technology have:
(1) piezoelectric hydrophone is used in the prior art, there is intrinsic frequency and system structure, can only realize that specific objective is supervised
It listens, and look-in frequency range is small；And conventional piezoelectric hydrophone is poor to the pick-up capability of low frequency signal；
(2) piezoelectric hydrophone in the prior art, using active detection listening mode；Active sonar technology refers to sonar master
Dynamic transmitting signal irradiates target, receives the echo of target reflection in water then to measure target component, mostly uses transmitted wave arteries and veins greatly
The mode of punching or continuous sine wave, piezoelectric hydrophone just use above-mentioned active probe listening mode, are not able to satisfy Sound stealth skill
The requirement of art, easily exposure；
(3) optical fiber water in the prior art listens array observation to be generally limited only to the water surface or only seabed；And it is existing
There is the optical fiber water in technology that array is listened to be merely capable of monitoring naval vessel, or only dolphin is monitored etc., it can not
Realize fixed point qualitative observation；Echo signal is monitored to be not achieved within the scope of three-dimensional with positioning and is laid out Quantitative Monitoring.
Summary of the invention
In view of the above technical problems, a purpose of the invention is to provide a kind of passive Frequency Adjustable formula underwater sound monitoring positioning system
System, which listens array using annular 360 degree of fiber grating water, by listening array to distinguish in 360 degree of fiber grating water of the annular
Buoy is installed on to monitor and in positioning device and underwater hovering monitoring and positioning device, can be realized the water surface and underwater stereoscopicization prison
It listens and positions.
The present invention can be carried out another object is that a kind of passive Frequency Adjustable formula underwater sound monitoring positioning system using bank base software
Frequency modulation, can not only meet the monitoring and positioning of specific objective frequency, but also can meet the echo signal detection in wider frequency range.
The present invention is achieved by the following technical solutions:
The passive Frequency Adjustable formula underwater sound monitors positioning system, comprising: bank station receives control system, buoy is monitored and filled with positioning
It sets, underwater hovering is monitored and positioning device；
It includes for acquiring the underwater sound that the buoy, which is monitored and monitored with positioning device and the underwater hovering with positioning device,
360 degree of fiber grating water of annular of signal listen array；
When carrying out underwater sound monitoring, the buoy is monitored and is set to the water surface with positioning device, for acquiring the water of the water surface
Acoustical signal；The underwater hovering is monitored and is set under water with positioning device, for acquiring underwater underwater sound signal；By described
Buoy monitor monitored with positioning device and the underwater hovering can be realized the water surface with positioning device and underwater stereoscopicization monitor with
Positioning；
The bank station receives control system and the buoy is monitored and communicated to connect with positioning device；The buoy is monitored and is determined
Position device and the underwater hovering are monitored to be communicated to connect with positioning device.
Further, it includes 12 fiber grating water being arranged in a ring that annular 360 degree of fiber grating water, which listens array,
Device is listened, 12 optical fiber grating sonic device uniform intervals are arranged, and are in 30 degree points between 2 optical fiber grating sonic devices of arbitrary neighborhood
Cloth；
When measuring, 4 optical fiber grating sonic devices in 12 optical fiber grating sonic devices are located at due north, just
South, due east and due west direction.
Further, it includes that frequency modulation is monitored setup module, wireless network module and/or defended that the bank station, which receives control system,
Star communication module；
The signal frequency output underwater sound signal frequency acquisition that the frequency modulation is monitored setup module and can be acquired as needed is set
Confidence breath；The underwater sound signal frequency acquisition setting information includes that underwater sound signal acquisition highest frequency value and underwater sound signal acquire most
Low frequency value；
The underwater sound signal frequency acquisition setting information is passed by the wireless network module and/or satellite communication module
It send to buoy monitoring and positioning device, the buoy is monitored and positioning device believes underwater sound signal frequency acquisition setting
Breath is sent to the underwater hovering monitoring and positioning device.
Further, according to the underwater sound signal frequency acquisition setting information, when the underwater sound signal highest frequency value is big
When underwater sound signal acquires lowest frequency value, the buoy is monitored and positioning device and underwater hovering monitoring and positioning device
The underwater sound signal frequency of acquisition is fallen between the underwater sound signal highest frequency value and underwater sound signal acquisition lowest frequency value；
When the underwater sound signal highest frequency value and underwater sound signal acquisition lowest frequency value are equal, for particular acquisition frequency
Value；The buoy monitors the underwater sound signal frequency acquired with positioning device and underwater hovering monitoring and positioning device and described
Particular acquisition frequency values are equal.
Further, it is monitored when the buoy and exist with positioning device and underwater hovering monitoring and positioning device
When carrying out underwater sound signal acquisition, 360 degree of fiber grating water of annular are listened into the underwater sound that each optical fiber grating sonic device obtains in array
Underwater sound signal frequency acquisition range defined by signal frequency and the underwater sound signal frequency acquisition setting information compares point
Analysis；If the underwater sound signal frequency that acquisition obtains within the scope of underwater sound signal frequency acquisition, is given up automatically not defined by；
If the underwater sound signal frequency that acquisition obtains within the scope of underwater sound signal frequency acquisition, is stored, and most defined by
It is sent to the bank station eventually and receives control system.
Further, the underwater hovering monitoring and positioning device, comprising:
Annular 360 degree of fiber grating water listen array, for acquiring underwater underwater sound signal；
First conditioning circuit, for listening array to be modulated demodulation in underwater 360 degree of fiber grating water of annular；
Compass, for acquiring the location information of the underwater hovering monitoring and positioning device；
First storage device is adopted for storing the modulation intelligence after the first conditioning circuit modulation /demodulation and the compass
The location information of collection；
First underwater acoustic communication machine, is used for and the buoy is monitored and positioning device communication connection, and first storage is filled
The modulation intelligence and location information for setting storage are sent to the buoy monitoring and positioning device；
Lithium battery power supply module is powered for monitoring for the underwater hovering with positioning device.
Further, the buoy monitoring and positioning device, comprising:
Buoy floats on the water surface with positioning device for monitoring the buoy；
Annular 360 degree of fiber grating water listen array, for acquiring the underwater sound signal of the water surface；
Second conditioning circuit listens battle array with 360 degree of fiber grating water of annular in positioning device for monitoring the buoy
Column are modulated demodulation；
GPS positioning device, for acquiring the location information of the buoy monitoring and positioning device；
Second underwater acoustic communication machine, is used for and the underwater hovering is monitored and communicated to connect with positioning device, receives described underwater
Suspend the modulation intelligence and location information monitored with positioning device；
Second storage device, it is fixed for storing the modulation intelligence after the second conditioning circuit modulation /demodulation and the GPS
The location information of position device acquisition；And it is connected with the second underwater acoustic communication machine, receives the underwater hovering and monitor and position
The modulation intelligence and location information of device；
Wireless network module and/or satellite communication module, for by all modulation intelligences in second storage device
The bank station, which is sent to, with location information receives control system；
Solar powered module is powered for monitoring for the buoy with positioning device.
Further, it further includes display module that bank station, which receives control system, for showing the received underwater sound signal arrived
And location information.
Further, when carrying out underwater sound monitoring and positioning, centered on buoy monitoring and positioning device, the water
It is lower suspend to monitor be set to the buoy with positioning device and monitor and peripheral underwater of positioning device；Each described buoy is monitored
It is monitored and positioning device with 3 equally distributed underwater hoverings are at least launched in the underwater same plane of positioning device periphery.
Advantageous effects of the invention:
System of the present invention can be realized passive type and monitor and position, and be able to solve the limitation of short distance active sonar
Property, meet Sound stealth technical requirements；
System of the present invention carries out frequency modulation using bank base software, monitors and positioning signal frequency range is adjustable sets, and monitors and believes
Number frequency can not only meet the monitoring and positioning of specific objective frequency, but also can meet the echo signal detection in wider frequency range；
System of the present invention can realize the monitoring of wide scope frequency modulation type or the monitoring of specific objective frequency, using 360 degree of rings
Shape fiber grating water listens Array Design, listens array to be loaded on buoy and underwater hovering device respectively in 360 degree of optical fibre ring grating water,
It can be realized and monitor and position with water surface long range wide scope three-dimensional under water；
Detailed description of the invention
Fig. 1 is that buoy monitoring is monitored with positioning device and underwater hovering in the embodiment of the present invention and positioning device structure is illustrated
Figure；
Fig. 2 is that buoy monitoring is monitored with positioning device and underwater hovering in the embodiment of the present invention and positioning device structure is overlooked
Figure；
Fig. 3 is that annular 360 degree of fiber grating water listen array structure schematic diagram in the embodiment of the present invention；
Fig. 4 is the first conditioning circuit described in the embodiment of the present invention and second conditioning circuit to fiber grating signal tune
Manage schematic diagram；
Fig. 5 is the positional diagram that annular 360 degree of fiber grating water listen array and sound source A in the embodiment of the present invention；
Fig. 6 is to listen the space of 8 points of array and sound source A to sit using annular 360 degree of fiber grating water in the embodiment of the present invention
Mark system；
Appended drawing reference:
1. buoy；2. annular 360 degree of fiber grating water listen array；3. underwater acoustic communication machine；4. underwater sealing cabin；5. buoy is supervised
It listens and positioning device；6. underwater hovering is monitored and positioning device.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
On the contrary, the present invention covers any substitution done on the essence and scope of the present invention being defined by the claims, repairs
Change, equivalent method and scheme.Further, in order to make the public have a better understanding the present invention, below to of the invention thin
It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art
The present invention can also be understood completely in description.
For in the prior art, optical fiber water listens array using piezoelectric hydrophone, has intrinsic frequency and system structure, can only
Realize that specific objective is monitored, and look-in frequency range is small, and in the prior art, optical fiber water listens array to be generally used for
Qualitative observation is pinpointed, echo signal is monitored, the technical issues of being laid out Quantitative Monitoring is not achieved within the scope of three-dimensional with positioning.
The embodiment of the present invention provides a kind of passive Frequency Adjustable formula underwater sound monitoring positioning system, which is characterized in that such as Fig. 1-2；
It include: that bank station receives control system, buoy is monitored and positioning device, underwater hovering monitoring and positioning device；
It includes for acquiring the underwater sound that the buoy, which is monitored and monitored with positioning device and the underwater hovering with positioning device,
360 degree of fiber grating water of annular of signal listen array；
When carrying out underwater sound monitoring, the buoy is monitored and is set to the water surface with positioning device, for acquiring the water of the water surface
Acoustical signal；The underwater hovering is monitored and is set under water with positioning device, for acquiring underwater underwater sound signal；By described
Buoy monitor monitored with positioning device and the underwater hovering can be realized the water surface with positioning device and underwater stereoscopicization monitor with
Positioning；
The bank station receives control system and the buoy is monitored and communicated to connect with positioning device；The buoy is monitored and is determined
Position device and the underwater hovering are monitored to be communicated to connect with positioning device.
In the present embodiment, as shown in figure 3, the characteristics of annular 360 degree of fiber grating water listens array are as follows: including being in ring
12 optical fiber grating sonic devices of shape setting, 12 optical fiber grating sonic device uniform intervals setting, 2 optical fiber of arbitrary neighborhood
In 30 degree of distributions between grating hydrophone；
When measuring, 4 optical fiber grating sonic devices in 12 optical fiber grating sonic devices are located at due north, just
South, due east and due west direction.Such as, when acoustical signal gradually listens array to annular 360 degree of fiber grating water from direct north
Center is mobile, first it is detected that signal is 0 degree (due north), 330 degree (30 degree of positive north by west), 30 degree (30 degree of North by East) square
To three optical fiber grating sonic devices.With the movement of acoustical signal, each optical fiber grating sonic device gradually receives signal, works as shifting
When moving 360 degree of fiber grating water of shape and listening the center of array, signal frequency and width that each optical fiber grating sonic device receives
It is worth almost the same.
It is listened in array in annular 360 degree of fiber grating water, by direct north optical fiber grating sonic device and compass due north
It places consistent.The acoustical signal strength distribution that each optical fiber grating sonic device receives in array is listened by the water of acquisition, can be sentenced
The cardinal points of disconnected acoustical signal.
It includes that frequency modulation monitors setup module, wireless network module and/or satellite communication mould that the bank station, which receives control system,
Block；
The signal frequency output underwater sound signal frequency acquisition that the frequency modulation is monitored setup module and can be acquired as needed is set
Confidence breath；The underwater sound signal frequency acquisition setting information includes that underwater sound signal acquisition highest frequency value and underwater sound signal acquire most
Low frequency value.
The underwater sound signal frequency acquisition setting information is passed by the wireless network module and/or satellite communication module
It send to buoy monitoring and positioning device, the buoy is monitored and positioning device believes underwater sound signal frequency acquisition setting
Breath is sent to the underwater hovering monitoring and positioning device.
When underwater sound signal acquires highest frequency value and underwater sound signal acquisition lowest frequency value is equal, the buoy monitor with
Positioning device and the underwater hovering are monitored and the underwater sound signal frequency of positioning device acquisition and the underwater sound signal highest frequency
It is worth equal；Achieve that the underwater sound signal key decryptor to single-frequency.When underwater sound signal acquires highest frequency value and underwater sound letter
When number acquisition lowest frequency value is unequal, the buoy, which is monitored, to be adopted with positioning device and underwater hovering monitoring with positioning device
The underwater sound signal frequency of collection is fallen between the underwater sound signal highest frequency value and underwater sound signal acquisition lowest frequency value, Neng Gouman
Echo signal detection in sufficient wider frequency range.
Specifically, in the present embodiment, it is monitored when the buoy and monitors and position with positioning device and the underwater hovering
Device is being carried out when carrying out underwater sound signal acquisition, listens each fiber grating water in array to listen in 360 degree of fiber grating water of annular
Underwater sound signal frequency acquisition model defined by the underwater sound signal frequency and the underwater sound signal frequency acquisition setting information that device obtains
It encloses and compares and analyzes；If acquire obtain underwater sound signal frequency not defined by underwater sound signal frequency acquisition range it
It is interior, then give up automatically；If acquiring the underwater sound signal frequency obtained defined by within the scope of underwater sound signal frequency acquisition,
It is stored, and is eventually sent to the bank station and receives control system.
In the present invention, the buoy monitor and positioning device in addition to realize echo signal monitor with positioning major function it
Outside, relay function is acted also as, underwater hovering is received using underwater acoustic communication set and monitors the echo signal data obtained with positioning device,
Bank station, which is sent, by monitoring signal data by wireless network module and/or satellite communication module receives control system, while bank
It stands and receives the underwater sound signal set of frequency information that control system issues, underwater hovering is forwarded to by underwater acoustic communication set and monitors dress
It sets.
In this embodiment, it is preferred that the underwater hovering is monitored and positioning device, comprising:
Annular 360 degree of fiber grating water listen array, for acquiring underwater underwater sound signal；
First conditioning circuit, for listening each fiber grating water in array to underwater 360 degree of fiber grating water of annular
Device is listened to be modulated demodulation；
First conditioning circuit, which monitors underwater hovering, listens 12 optical fiber of array with 360 degree of fiber grating water annular in positioning device
The modulation and demodulation of grating hydrophone guarantees temporal synchronism, according to amplitude size preferred arrangement, carries out preferred signals frequency
The judgement of rate consistency, the consistent signal of frequency are stored by maximum amplitude to the first storage device；
Compass, for acquiring the location information of the underwater hovering monitoring and positioning device；
First storage device is adopted for storing the modulation intelligence after the first conditioning circuit modulation /demodulation and the compass
The location information of collection；In this embodiment, it is preferred that second storage device is stored using TF card.
First underwater acoustic communication machine, is used for and the buoy is monitored and positioning device communication connection, and first storage is filled
The modulation intelligence and location information for setting storage are sent to the buoy monitoring and positioning device.
Lithium battery power supply module is powered for monitoring for the underwater hovering with positioning device.
Preferably, the buoy monitoring and positioning device, comprising:
Buoy floats on the water surface with positioning device for monitoring the buoy；
Annular 360 degree of fiber grating water listen array, for acquiring the underwater sound signal of the water surface；
Second conditioning circuit listens battle array with 360 degree of fiber grating water of annular in positioning device for monitoring the buoy
Each optical fiber grating sonic device of column is modulated demodulation；
Second conditioning circuit, which monitors buoy, listens 12 fiber grating of array with 360 degree of fiber grating water annular in positioning device
The modulation and demodulation of hydrophone guarantees temporal synchronism, according to amplitude size preferred arrangement, carries out preferred signals frequency one
The judgement of cause property, the consistent signal of frequency are stored by maximum amplitude to second storage device；
GPS positioning device, for acquiring the location information of the buoy monitoring and positioning device；
Second underwater acoustic communication machine, is used for and the underwater hovering is monitored and communicated to connect with positioning device, receives described underwater
Suspend the modulation intelligence and location information monitored with positioning device；
Second storage device, it is fixed for storing the modulation intelligence after the second conditioning circuit modulation /demodulation and the GPS
The location information of position device acquisition；And it is connected with the second underwater acoustic communication machine, receives the underwater hovering and monitor and position
The modulation intelligence and location information of device；In this embodiment, it is preferred that second storage device is stored using TF card.
Wireless network module and/or satellite communication module, for by all modulation intelligences in second storage device
The bank station, which is sent to, with location information receives control system；
Solar powered module is powered for monitoring for the buoy with positioning device.
In the present embodiment, array acquisition underwater sound signal, advantage are listened using 360 degree of fiber grating water of annular are as follows: optical fiber light
Gate signal conditioning is based on lightwave signal, using fiber grating as transmission medium, during light wave transmissions, with Bragg condition
It is reflected, the wavelength formula of Bragg condition are as follows:
λ B=2Neff Λ (1)
In formula: λ B is the center reflection wavelength of fiber grating, i.e. resonance coupled wavelength；
Neff is effective refractive index；
Λ is grating pitch.
When stress around grating is with sound pressure variations, it will lead to Neff or Λ variation, generate sensing grating foveal reflex
Wavelength shift.According to linear relationship between Δ Neff, Δ Λ and acoustic pressure, the information of sound pressure variations can be obtained.Offset calculates
Formula are as follows:
Δ λ B=2 Δ Neff Λ+2Neff Δ Λ (2)
Fiber bragg grating (FBG) has fixed physical central wavelength, but under marine environment, by hydrostatic pressing
The influence of power, temperature, salinity can make central wavelength (λ B) cause to drift about.Sound pressure variations are dynamic change, hydrostatic pressure, temperature
Degree, salinity are relative quiescents.In order to guarantee that sound pressure information is not flooded by factors such as hydrostatic pressure, temperature, salinity, removal is static
Variable guarantees dynamic variable, obtains reliable underwater sound signal, utilizes tunable F-P optical filter to light in modulation-demodulation circuit
The static wave length shift of fine Bragg grating (FBG) realizes real-time automatic tracking monitoring, is obtained according to hydrostatic pressure, temperature, salinity
Central wavelength automatic adjustment is realized in variation.
As shown in figure 4, in the present embodiment, first conditioning circuit and second conditioning circuit believe fiber grating
Number conditioning technology mainly includes optical path and circuit two parts；F-P boundary filter is taken to realize that central wavelength automatically tracks；
Light path part drives wideband light source by constant-current source, and optical signal is reflected by optical fibre optical grating sensing array, reflected light
Spectrum divides two-way through coupler, becomes demodulating system input signal through tunable fiber F-P filter all the way, directly carries out light all the way
Electricity conversion is used as reference signal, and two paths of signals fusion calculation demodulates external physical quantity variable signal, measures the external physical quantity
The size and frequency of variable signal transformation are just it can be seen that the size and frequency of underwater sound signal to be measured vibration；Wherein, two paths of signals passes through
Operation superposition, the low-pass filtered feedback compensation central wavelength of tempolabile signal, fast varying signal are exported as practical underwater sound signal；Control
System drives F-P cavity to automatically track the variation of FBG central wavelength by PID, and the driving voltage of F-P cavity is with FBG static center
The drift of wavelength and change；It can inhibit the influence of hydrostatic pressure, temperature change, seawater salinity to underwater sound vibration acquisition.
In the present embodiment, it further includes display module that bank station, which receives control system, for showing the received underwater sound arrived
Signal and location information.
Positioning system is monitored using the passive Frequency Adjustable formula underwater sound provided in above-described embodiment, the annular can be passed through
360 degree of fiber grating water listen array to realize 360 comprehensive monitorings, and cooperation compass can determine the orientation of sound source, can calculate sound source away from
From and height；Specific method is
As shown in figure 5, annular 360 degree of fiber grating water listen each optical fiber grating sonic device of array under the influence of acoustical signal
The signal amplitude of acquisition is of different sizes, and the bank station receives control system and listens array for buoy and underwater hovering device annular water
The distribution situation of underwater sound signal amplitude size determines the azran of underwater sound signal in conjunction with compass and GPS information；
The vibration amplitude that sound source A listens each optical fiber grating sonic device of array to generate in annular 360 degree fiber grating water with
Receiving time difference is different, and the sound-source signal amplitude obtained in actual use to each optical fiber grating sonic device is arranged
Sequence obtains amplitude maximum optical fiber grating sonic device labeled as P1, and the amplitude maximum that P1 is measured is denoted as K1；Correspondingly, amplitude is minimum
Optical fiber grating sonic device be labeled as P12, amplitude that P12 is measured is minimum, is denoted as K12.
Annular 360 degree of fiber grating water listen each optical fiber grating sonic device in array to can be used in sound source measuring and calculating, but are
Operand is reduced, using only the smallest optical fiber grating sonic device P12 of the optical fiber grating sonic device P1 and amplitude of amplitude maximum；Using
Annular 360 degree of fiber grating water listen array to carry out sound source A direction, distance and height measuring method are as follows:
Direction measuring and calculating:
(1) if compass north (0 degree) is corresponding with optical fiber grating sonic device P1, the i.e. corresponding south optical fiber grating sonic device P12
To (180 degree)；Signal source A is located at northern 0 degree of direction at this time.
(2) if compass east orientation (90 degree) is corresponding with optical fiber grating sonic device P1, the i.e. corresponding west optical fiber grating sonic device P12
To (270 degree)；Signal source A is located at 90 degree of east at this time；
Remaining orientation angle and so on.
Distance is calculated with height:
In Fig. 5, S3 is the optical fiber grating sonic device P1 nearest apart from sound source and is the fiber grating water farthest apart from sound source
Listen the fixed range between device P12；S1 is the distance between optical fiber grating sonic device P1 and sound source A, and S2 is that fiber grating water is listened
The distance between device P12 and sound source A；
S1=C* Δ T1, S2=C* Δ T2；
Wherein C is the fixed spread speed of the underwater sound, and Δ T1 is the time interval that optical fiber grating sonic device P12 receives sound source A,
Δ T2 is the time interval that optical fiber grating sonic device P1 receives sound source A；
(1) if K1 > 0, K12=0；
Sound source A is located at annular 360 degree of fiber grating water and listens in plane locating for array, is located at the side P1；
(2) if K1=0, K12 > 0；
Sound source A is located at annular 360 degree of fiber grating water and listens in plane locating for array, is located at the side P12；
(3) if K1 > 0, K12 > 0；
It is h0 that sound source A and annular 360 degree of fiber grating water, which listen the height distance between plane locating for array,.
If K1 > K12, A are located at the side P1
A=arccos ((s1^2+s3^2-s2^2)/2s1*s3)
H0=s1*sin (a)；The angle of a line between line and A and P12 between P1 and P12；
If K1 < K12, A are located at the side P12
C=arccos ((s2^2+s3^2-s1^2)/2s2*s3)
H0=s2*sin (c)
The angle of c line between line and A and P1 between P1 and P12；
Sound-source signal can be calculated by monitoring positioning system using the passive Frequency Adjustable formula underwater sound provided by the present embodiment
GPS information and the water surface below how much rice, make sound-source signal more transparence, method particularly includes:
The passive Frequency Adjustable formula underwater sound monitors the shared annular 360 degree of fiber grating water of positioning system and listens 4 sets of array, respectively
It is 1 set of the water surface (being arranged in buoy monitoring and positioning device), it is 3 sets underwater (in the monitoring of setting underwater hovering and positioning device),
Every set uses 2 points of calculating (the smallest optical fiber grating sonic device P12 of optical fiber grating sonic device P1 and amplitude of amplitude maximum), shares
8 points realize that the three-dimensional of sound source As is monitored and positioning, establish space coordinates according to this as shown in fig. 6, the coordinate system, with buoy
Monitoring with positioning device central axis is z-axis, is monitored with 3 sets of underwater hoverings and is listened with 360 degree of fiber grating water annular in positioning device
Plane locating for array is x/y plane.As long as obtaining any 4 information in practical calculating process (in 4 collar-shaped, 360 degree of fiber gratings
Water is listened in battle array to be chosen a bit respectively) equation group progress A (x, y, z) resolving can be established, formula is as follows:
Wherein, (x1, y1, z1) (x2, y2, z2) (x3, y3, z3) (x4, y4, z4) respectively indicates buoy and monitors and positioning dress
It sets, 3 sets of underwater hoverings monitor the coordinate system that any point in array is listened with 360 degree of fiber grating water annular in positioning device；R1,
R2, R3, R4 respectively indicate the distance of (x1, y1, z1) (x2, y2, z2) (x3, y3, z3) (x4, y4, z4) apart from sound source A at 4 points；
By the coordinate system (x, y, z) that sound source A can be obtained after above formula decomposition operation；
The point is projected into x, z-plane calculates the GPS information of the point.The GPS information with positioning device is monitored according to buoy
(T (Lon (longitude), Lat (latitude)) and A point coordinate.Calculation formula are as follows:
Calculate deviation angle first: Δ lon is the longitude offset of opposite buoy GPS, latitude of the Δ lat with respect to buoy GPS
Offset
Δ lon=z/ (111320*cos (Lat))
Δ lat=x/110540
Thus the GPS information for obtaining A point is (Lon+ Δ lon, Lat+ Δ lat)
The passive Frequency Adjustable formula underwater sound provided by the present embodiment monitors positioning system compared with traditional technology, at least have with
Lower advantageous effects:
(1) traditional piezoelectric hydrophone is poor to the pick-up capability of low frequency signal, and the application uses fiber grating Bradley
Lattice water listens array to be mentioned, and optical fiber grating sonic device can detect minimum signal and self noise compared with conventional piezoelectric hydrophone
Than the high 2-3 order of magnitude, good frequency response, with wide, low frequency signal coherence is good and propagation loss is small；
(2) it is monitored using passive type, does not have to generate transmitting signal, measurement target letter is obtained by vibration caused by acoustical signal
Breath, monitoring means should not expose, be not easy to be found.
Claims (9)
1. the passive Frequency Adjustable formula underwater sound monitors positioning system characterized by comprising bank station receives control system, buoy is monitored
With positioning device, underwater hovering monitoring and positioning device；
It includes for acquiring underwater sound signal that the buoy, which is monitored and monitored with positioning device and the underwater hovering with positioning device,
360 degree of fiber grating water of annular listen array；
When carrying out underwater sound monitoring, the buoy is monitored and is set to the water surface with positioning device, the underwater sound for acquiring the water surface is believed
Number；The underwater hovering is monitored and is set under water with positioning device, for acquiring underwater underwater sound signal；Pass through the buoy
It monitors to monitor with positioning device and the underwater hovering and can be realized the water surface and underwater stereoscopicization monitoring and positioning with positioning device；
The bank station receives control system and the buoy is monitored and communicated to connect with positioning device；The buoy is monitored to be filled with positioning
It sets to monitor with the underwater hovering and be communicated to connect with positioning device.
2. the passive Frequency Adjustable formula underwater sound monitors positioning system according to claim 1, which is characterized in that described annular 360 degree
It includes 12 optical fiber grating sonic devices being arranged in a ring that fiber grating water, which listens array, and 12 optical fiber grating sonic devices are uniform
Interval is arranged, in 30 degree of distributions between 2 optical fiber grating sonic devices of arbitrary neighborhood；
When measuring, 4 optical fiber grating sonic devices in 12 optical fiber grating sonic devices be located at due north, due south,
Due east and due west direction.
3. the passive Frequency Adjustable formula underwater sound monitors positioning system according to claim 1, which is characterized in that the bank station receives control
System processed includes that frequency modulation monitors setup module, wireless network module and/or satellite communication module；
The frequency modulation monitors the signal frequency output underwater sound signal frequency acquisition setting letter that setup module can acquire as needed
Breath；The underwater sound signal frequency acquisition setting information includes underwater sound signal acquisition highest frequency value and underwater sound signal acquisition lowest frequency
Rate value；
The underwater sound signal frequency acquisition setting information is transferred by the wireless network module and/or satellite communication module
The buoy is monitored and positioning device, and the buoy is monitored and positioning device passes the underwater sound signal frequency acquisition setting information
It send to underwater hovering monitoring and positioning device.
4. the passive Frequency Adjustable formula underwater sound monitors positioning system according to claim 3, which is characterized in that believed according to the underwater sound
Number frequency acquisition setting information, it is described when the underwater sound signal highest frequency value is greater than underwater sound signal acquisition lowest frequency value
Buoy, which is monitored to monitor with positioning device and the underwater hovering, falls in the underwater sound with the underwater sound signal frequency of positioning device acquisition
Between signal highest frequency value and underwater sound signal acquisition lowest frequency value；
When the underwater sound signal highest frequency value and underwater sound signal acquisition lowest frequency value are equal, for particular acquisition frequency values；Institute
It states buoy and monitors the underwater sound signal frequency acquired with positioning device and underwater hovering monitoring with positioning device and described specific
Frequency acquisition value is equal.
5. the passive Frequency Adjustable formula underwater sound monitors positioning system according to claim 4, which is characterized in that when the buoy is monitored
It is monitored with positioning device and the underwater hovering and positioning device is being carried out when carrying out underwater sound signal acquisition, by 360 degree of annular
Fiber grating water listens the underwater sound signal frequency and the underwater sound signal frequency acquisition that each optical fiber grating sonic device obtains in array
Underwater sound signal frequency acquisition range defined by setting information compares and analyzes；If acquiring the underwater sound signal frequency obtained not
Defined by within the scope of underwater sound signal frequency acquisition, then give up automatically；If acquiring the underwater sound signal frequency obtained in institute
It within the scope of the underwater sound signal frequency acquisition of restriction, is then stored, and is eventually sent to the bank station and receives control system.
6. any one of -4 passive Frequency Adjustable formula underwater sounds monitor positioning system according to claim 1, which is characterized in that the water
Lower suspension is monitored and positioning device, comprising:
Annular 360 degree of fiber grating water listen array, for acquiring underwater underwater sound signal；
First conditioning circuit, for listening array to be modulated demodulation in underwater 360 degree of fiber grating water of annular；
Compass, for acquiring the location information of the underwater hovering monitoring and positioning device；
First storage device, for storing the modulation intelligence after the first conditioning circuit modulation /demodulation and compass acquisition
Location information；
First underwater acoustic communication machine, is used for and the buoy is monitored and positioning device communication connection, and the first storage device is deposited
The modulation intelligence and location information of storage are sent to the buoy monitoring and positioning device；
Lithium battery power supply module is powered for monitoring for the underwater hovering with positioning device.
7. monitoring positioning system according to any one of the claim 6 passive Frequency Adjustable formula underwater sound, which is characterized in that the buoy
Monitoring and positioning device, comprising:
Buoy floats on the water surface with positioning device for monitoring the buoy；
Annular 360 degree of fiber grating water listen array, for acquiring the underwater sound signal of the water surface；
Second conditioning circuit, for the buoy monitor with positioning device in 360 degree of fiber grating water of annular listen array into
Row modulation /demodulation；
GPS positioning device, for acquiring the location information of the buoy monitoring and positioning device；
Second underwater acoustic communication machine, is used for and the underwater hovering is monitored and communicated to connect with positioning device, receives the underwater hovering
Monitor the modulation intelligence and location information with positioning device；
Second storage device, for storing the modulation intelligence after the second conditioning circuit modulation /demodulation and GPS positioning dress
Set the location information of acquisition；And it is connected with the second underwater acoustic communication machine, receives the underwater hovering monitoring and positioning device
Modulation intelligence and location information；
Wireless network module and/or satellite communication module, for by all modulation intelligences in second storage device and calmly
Position information is sent to the bank station and receives control system；
Solar powered module is powered for monitoring for the buoy with positioning device.
8. the passive Frequency Adjustable formula underwater sound monitors positioning system according to claim 7, which is characterized in that bank station receives control system
System further includes display module, for showing the received underwater sound signal and location information arrived.
9. the passive Frequency Adjustable formula underwater sound monitors positioning system according to claim 1, which is characterized in that carrying out underwater sound monitoring
When with positioning, centered on buoy monitoring and positioning device, the underwater hovering monitoring is set to described with positioning device
Buoy is monitored underwater with positioning device periphery；Each described buoy is monitored in the underwater same plane with positioning device periphery
At least launch 3 equally distributed underwater hoverings monitorings and positioning device.
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