CN103760605B - Acoustic receiving module of horizontal control device - Google Patents
Acoustic receiving module of horizontal control device Download PDFInfo
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- CN103760605B CN103760605B CN201410020020.5A CN201410020020A CN103760605B CN 103760605 B CN103760605 B CN 103760605B CN 201410020020 A CN201410020020 A CN 201410020020A CN 103760605 B CN103760605 B CN 103760605B
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Abstract
The invention provides an acoustic receiving module of a horizontal control device. The acoustic receiving module comprises an acoustic signal receiving unit and an acoustic transducer, wherein the acoustic signal receiving unit comprises a digital signal processor (DSP) receiving circuit and a communication control circuit, the DSP receiving circuit is connected with the acoustic transducer, the communication control circuit is connected with a communication coil of the horizontal control device and interacts with the DSP receiving circuit, the acoustic transducer comprises a piezoelectric ceramic spherical shell and a circuit lead-out end, the inner surface and the outer surface of the piezoelectric ceramic spherical shell are coated with electrodes which are polarized in the thickness direction, and the circuit lead-out end is used for outputting acoustic signals produced by the piezoelectric ceramic spherical shell. The acoustic receiving module is applied to the horizontal control device used for collecting towing cable arrays and is simple in structure, reliable in operation and suitable for ocean operating environment.
Description
Technical field
The present invention relates to Exploration Domain, more particularly, to a kind of horizontal bird acoustic receiver module.
Background technology
Marine seismic prospectiong typically by artificial excitation's seismic wave, by several after geophysical vessel of towing equipped with detection
The collection towing cable of device receives stratum back wave.Efficient physical prospecting acquisition vessel can drag 12～16 stripe pitch at 50～100 meters
Collection towing cable carries out operation.Assist in keeping towing cable spacing in streamer front end using single-blade deflection plate, after towing cable, use horizontal bird
(can be described as level control device) controlling again.Horizontal bird acoustic receiver transducer is the key components of horizontal bird, mainly
Complete the function of horizontal bird the whole network acoustics positioning.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of sound of the level control device being applied to collection towing cable linear array
Learn receiver module, its structure is simple, reliable operation, suitable ocean operation environment.
In order to solve the above problems, the invention provides a kind of horizontal bird acoustic receiver module, comprising:
Acoustic signal receiving unit and acoustic transducer；
Described acoustic signal receiving unit includes:
Digital signal processor dsp receiving circuit, is connected with described acoustic transducer；
Communication control circuit, is connected with the communication coil in described horizontal bird, and is handed over described dsp receiving circuit
Mutually；
Described acoustic transducer includes:
Piezoelectric ceramic ball shell, surfaces externally and internally scribbles electrode, in thickness direction (radial direction) polarization；
Service outlet, for exporting the acoustic signal that described piezoelectric ceramic ball shell produces.
Alternatively, described communication control circuit includes:
Main control module circuit, electric power management circuit and frequency shift keying fsk communication module circuit；
Described main control module circuit is used for carrying out communications protocol interaction, data conversion, work schedule management and power management；
When acoustic signal receiving unit does not work, main control module circuit is in low-power consumption standby listening state, and indicates described power supply
The working power of fsk communication module circuit and dsp receiving circuit in management circuitry cuts acoustic signal receiving unit；When receiving
After the work order of host computer, indicate that described electric power management circuit restores electricity；
Described fsk communication module circuit can for the fsk issuing modulated signal is demodulated to described main control module circuit
The protocol instructions of identification are sent to described main control module circuit；And the protocol data of main control module circuit upload is converted into fsk
Modulated signal sends into physical channel.
Alternatively, described fsk communication module circuit includes:
Micro-control unit mcu, fsk signal receiving circuit, fsk signal sending circuit；
Described mcu is used for carrying out the modulation /demodulation of fsk signal；
Described fsk signal receiving circuit includes being sequentially connected: the first signal amplification circuit, signal filter circuit and mixing
Circuit, low pass filter；
Described fsk signal sending circuit includes: secondary signal amplifying circuit, power amplification circuit and resonance circuit；Described
Secondary signal amplifying circuit is made up of amplifier, and the signal receiving from described mcu is amplified；Signal after amplification is through described
Power amplification circuit drives described resonance circuit, produces fsk modulation output signal, is sent to described communication coil.
Alternatively, described first signal amplification circuit total magnification is 1000 times, by each 10 times of amplification electricity of three-level
Road completes；
The square-wave signal of the fsk modulated signal of reception and 20khz is mixed by described mixting circuit by analog switch；
The cut-off frequency of described low pass filter is 15khz；
Described signal filter circuit is made up of one-stage low-pass filter and one-level high-pass filter；The cut-off of low pass filter
Frequency is 40khz, and the Chebyshev filter including two ranks and multiterminal feed back low-pass filter circuit；The cut-off of high-pass filter
Frequency is 17khz, and the Chebyshev filter including two ranks and multiterminal feed back circuit of high pass filter.
Alternatively, described dsp receiving circuit includes:
Acoustic signal receives pretreatment module circuit, and the acoustic signal for exporting to described acoustic transducer is filtered
And amplification；
Dsp signal processing module circuit, the signal for receiving pretreatment module circuit output according to acoustic signal is carried out
Time delay calculates, and result is exported to described main control module circuit.
Alternatively, described acoustic signal receives pretreatment module circuit and includes:
First order signal amplification circuit, the acoustic signal for exporting to described acoustic transducer is amplified；
Low pass filter, the signal for exporting to described first order signal amplification circuit carries out LPF；
Second level signal amplification circuit, is amplified to the signal after LPF；
High-pass filter, the signal for exporting to described second level signal amplification circuit carries out high-pass filtering；
Third level signal amplification circuit, is amplified to the signal after high-pass filtering；
Collection signal buffer, the signal for exporting to described third level signal amplification circuit enter row buffering and export to
Described dsp signal processing module circuit.
Alternatively, by low-power consumption, the operational amplifier of low noise is constituted described first, second and third grade of signal amplification circuit, the
The multiplication factor of one stage signal amplifying circuit is set to 50 times；The multiplication factor of the second level and third level signal amplification circuit respectively sets
It is set to 10 times；
The cut-off frequency of described low pass filter is 100khz, feeds back low pass including quadravalence Chebyshev filter and multiterminal
Filter circuit；The cut-off frequency of described high-pass filter is 50khz, feeds back high including quadravalence Chebyshev filter and multiterminal
Bandpass filter circuit.
Alternatively, described dsp signal processing module circuit includes:
Dsp, CPLD cpld, flash memory and analog-digital converter；
After described dsp completes reset and software initialization, described main control module circuit is notified by Serial Peripheral Interface (SPI), and
Download test configurations data；After receiving the test command of described main control module circuit, described sound is gathered according to work schedule
Learn the signal that signal receives pretreatment module circuit output, the signal of collection is calculated using matched filtering algorithm, obtains
Corresponding signal lag, then obtains time delay result of calculation by described analog-digital converter, is passed back to described main control module circuit；
Described cpld is used for the data conversion clock that frequency dividing obtains described analog-digital converter, and conversion flash memory page addresses；
Described flash memory is used for preserving sample of signal.
Alternatively, 24 signal to noise ratio converters selected by described analog-digital converter, and control interface includes data conversion clock and connects
Mouthful, data transfer clock interface, data transmission interface；Wherein said data conversion clock interface is connected with described cpld, described
Data transfer clock interface data coffret is connected with described dsp.
In technical scheme, acoustic transducer adopts piezoelectric ceramic ball shell to design, using new design and processes
Achieve the wideband operation of acoustic transducer, rational in infrastructure, manufacture craft is advanced, every underwater acoustic properties meet technical indicator will
Ask.The acoustic receiver module of the present invention adopts modular thought, and each part of module has standalone feature, can independently debug and
Maintenance.Each module section is completed by the mode that software systems and hardware circuit combine.Wherein hardware circuit is simple
Understand it is easy to keep in repair.Software systems clear thinking it is easy to modification, software function powerful, greatly reducing hardware circuit
Complexity.Simultaneously it is contemplated that the requirement to power consumption for the whole system, in the design of each module, all using the unit of low-power consumption
Device, and by the control of software, by the dump during module free time or entrance park mode, so that this module dissipation fall
For minimum.Present configuration is simple, reliable operation, suitable ocean operation environment；Horizontal bird the whole network acoustics can be efficiently accomplished fixed
The function of position.
Brief description
Fig. 1 is the schematic block diagram of the horizontal bird acoustic receiver module of embodiment one；
Fig. 2 is the schematic block diagram of communication control circuit in embodiment one；
Fig. 3 is the schematic block diagram of fsk communication module circuit in embodiment one；
Fig. 4 is the schematic block diagram that in embodiment one, acoustic signal receives pretreatment module circuit；
Fig. 5 is the schematic block diagram of dsp signal processing module circuit in embodiment one.
Specific embodiment
Below in conjunction with drawings and Examples, technical scheme is described in detail.
If it should be noted that not conflicting, each feature in the embodiment of the present invention and embodiment can mutually be tied
Close, all within protection scope of the present invention.In addition, though showing logical order in flow charts, but in some situations
Under, can be with the step shown or described different from order execution herein.
Embodiment one, a kind of horizontal bird acoustic receiver module, as shown in Figure 1, comprising:
Acoustic signal receiving unit；
Acoustic transducer, comprising:
Piezoelectric ceramic ball shell, surfaces externally and internally scribbles electrode, in thickness direction (radial direction) polarization；
Service outlet, for exporting the acoustic signal that described piezoelectric ceramic ball shell produces.
Horizontal bird acoustic receiver module, as a part for horizontal bird, is mainly used in receiving the information of acoustic wave of acoustics bird and surveying
Away from completing the function of horizontal bird the whole network acoustics positioning.The above-mentioned two part of this module combines the sound jointly completing horizontal bird
Learn positioning.
In the present embodiment, described acoustic elements can be, but not limited to, by vulcanized rubber or filling polyurethane sealing, be formed
Straight tube shape；Described service outlet is located at one end of this straight tube, can be hardware, by o type circle and electronic circuit
Partial metallic framework is sealed.
In the present embodiment, described acoustic transducer adopts the design of piezoelectric ceramic ball shell, mainly utilizes radial direction piezoelectricity
The radial direction vibrations mode of Ceramic Balls shell is operated.Piezoelectric ceramic ball shell is the core of acoustic transducer.
Because Thin Piezoelectric spherical shell is radial polarised, make harmonic vibration in atmosphere, so obtaining spherical shell radial direction resonance
Frequency:
In the present embodiment, described piezoelectric ceramic ball shell can be, but not limited to from piezoelectric ceramics pzt-5, the performance of pzt-5
Parameter is as follows:
σ=0.32 (2)
ρ=7.5×103kg/m3
fraIt is designed as 80khz, mean radius a=10mm of spherical shell can be obtained.
According to above-mentioned calculating, the piezoelectric ceramic ball shell that can be, but not limited to choose (φ 22mm × φ 10mm) carries out transducer
Develop.The acoustic transducer working band width being made using piezoelectric ceramic ball shell mode, spatial directivity is good, receiving sensitivity
High.
After the completion of acoustic transducer assembling, radiating surface and hardware junction carry out polyurethane seal, measure the underwater sound
Performance parameter, as shown in table 1.
Table 1 acoustic transducer underwater acoustic properties measurement parameter
| Performance parameter | Technical indicator | Actual measurement |
| fr(khz) | —— | 80 |
| gr(ms) | —— | 15 |
| δf(khz) | —— | 50 |
| sv(db) | —— | 145.7～149.5 |
| sl(db) | ≥180 | 190 |
| m(db) | ≥-208 | - 200.9～-205.8 |
| Horizontal directivity | —— | Non-directional |
| Vertical directivity | ≥40° | 70 °～300 ° |
From the point of view of above-mentioned measurement data, Thin Piezoelectric Shell Transducer all properties parameter all meets technical indicator will
Ask.
Therefore, horizontal bird acoustic transducer adopts piezoelectric ceramic ball shell to design, and is achieved using new design and processes and changes
The wideband operation of energy device, acoustic transducer is rational in infrastructure, and manufacture craft is advanced, and every underwater acoustic properties meet technical requirement.
In the present embodiment, described acoustic signal receiving unit is the core of horizontal bird acoustic receiver module, completes water
The reception to acoustic signal for the flat bird, is processed and data uploads, and realizes the acoustics positioning of the whole network.Functional block diagram is as shown in figure 1, wrap
Include:
Dsp(digital signal processor) receiving circuit, it is connected with described acoustic transducer；
Communication control circuit, is connected with the communication coil in described horizontal bird, and is handed over described dsp receiving circuit
Mutually.
Described communication control circuit is as shown in Figure 2, comprising:
Main control module circuit, electric power management circuit and fsk(frequency shift keying) communication module circuit；
Described main control module circuit is mainly used in realizing the Communication Control and between dsp receiver module, with fsk communication module electricity
Communication Control between road, whole system work schedule controls, the data exchange processing and between dsp receiver module and storage, and logical
Data exchange processing between news modular circuit etc..Therefore, the mode being designed with event triggering of main control module circuit.Work as reception
To after corresponding event command, complete corresponding command function according to command protocols.Corresponding instruction is shown in Table 2.
Table 2 instructs table corresponding with function
Described main control module circuit is the core of communication control circuit, for typically low-power-consumption embedded system.Main
To be designed with reference to main control software by the mcu of low-power consumption and to complete.Described main control module circuit is as acoustic signal receiving unit
" brain ", needs to complete communications protocol interaction, data conversion, the function such as work schedule management and power management.In acoustic signal
When receiving unit does not work, main control module circuit should be at low-power consumption standby listening state, and indicates described electric power management circuit
The working power of fsk communication module circuit and dsp receiving circuit in cut-out acoustic signal receiving unit, to ensure whole acoustics letter
The low power dissipation design of number receiving unit.In low-power consumption standby state, the power consumption of acoustic receiver modular circuit can as little as 25mw.When
After main control module circuit receives the work order of host computer, indicate that described electric power management circuit restores electricity, acoustic signal connects
Receive unit and return to normal operating conditions, and complete corresponding command function.Then wait the arrival of instruction breaks next time.
Described fsk communication module circuit is acoustic signal receiving unit and dry end dmu(data processor) physics that communicates
Layer circuit.The main modulation /demodulation being completed fsk signal by low-power consumption mcu with reference to fsk modulation /demodulation software, the fsk that dmu is issued
Modulated signal is demodulated to the protocol instructions that main control module circuit is capable of identify that and is sent to described main control module circuit；And by master control mould
The protocol data that block circuit uploads is converted into fsk modulated signal and sends into physical channel.
As shown in figure 3, described fsk communication module circuit includes:
Micro-control unit mcu, fsk signal receiving circuit, fsk signal sending circuit；
Described mcu is used for carrying out the modulation /demodulation of fsk signal, according to the protocol requirement of fsk signal, by 24.7khz square wave
Signal is expressed as logic 1；25.6khz square-wave signal is expressed as logical zero.Described mcu is used for completing to produce two kinds of different frequencies
Square-wave signal and distinguish two kinds of different frequencies square-wave input signal function.Produced according to input original signal using timer
The mode of the modulated signal of two kinds of different frequencies completes modulation function；Using timer capturing function write input upper
Rise the time that edge and trailing edge produce, and the time difference according to adjacent rising edge and trailing edge, demodulate original signal.
Described fsk signal receiving circuit includes being sequentially connected: the first signal amplification circuit, signal filter circuit and mixing
Circuit, low pass filter etc..Described first signal amplification circuit and described signal filter circuit are mainly set by low-power consumption amplifier
Count into.The square-wave signal of the fsk modulated signal of reception and 20khz is mixed by described mixting circuit by analog switch,
Signal after mixing through cut-off frequency the low pass filter for 15khz obtain the fsk modulated signal after frequency reducing be sent to described
mcu.
Described first signal amplification circuit total magnification is 1000 times, is completed by each 10 times of amplifying circuit of three-level.
Described signal filter circuit is made up of one-stage low-pass filter and one-level high-pass filter.The cut-off of low pass filter
Frequency is 40khz, and the Chebyshev filter including two ranks and multiterminal feed back low-pass filter circuit；The cut-off of high-pass filter
Frequency is 17khz, and the Chebyshev filter including two ranks and multiterminal feed back circuit of high pass filter.
Described fsk signal sending circuit includes secondary signal amplifying circuit, power amplification circuit and resonance circuit etc..Described
Secondary signal amplifying circuit is made up of amplifier, and the signal receiving from described mcu is amplified.Signal after amplification is through overpower
Amplifying circuit drives resonance circuit, produces fsk modulation output signal, is sent to described communication coil.
In the present embodiment, described dsp receiving circuit includes:
Acoustic signal receives pretreatment module circuit, and the acoustic signal for exporting to described acoustic transducer is filtered
And amplification, make the signal in collection terminal have enough signal to noise ratios；
Dsp signal processing module circuit, the signal for receiving pretreatment module circuit output according to acoustic signal is carried out
Time delay calculates, and result is exported to described main control module circuit.
It is a low noise wideband signal pre-processing circuit that described acoustic signal receives pretreatment module circuit, completes acoustics
The functions such as the amplification after transducer reception Target Weak Signal, filtering, as shown in figure 4, specifically may include that
First order signal amplification circuit, the acoustic signal for exporting to described acoustic transducer is amplified；
Low pass filter, the signal for exporting to described first order signal amplification circuit carries out LPF；
Second level signal amplification circuit, is amplified to the signal after LPF；
High-pass filter, the signal for exporting to described second level signal amplification circuit carries out high-pass filtering；
Third level signal amplification circuit, is amplified to the signal after high-pass filtering；
Collection signal buffer, the signal for exporting to described third level signal amplification circuit enter row buffering and export to
Described dsp signal processing module circuit.
By low-power consumption, the operational amplifier of low noise is constituted described first, second and third grade of signal amplification circuit, total amplification
Multiple is 5000 times, and described first order signal amplification circuit selects low-power consumption, and the amplifier of low noise completes.In view of raising passage
Signal to noise ratio, reduce input noise impact, output amplitude allow in the range of, by the amplification of first order signal amplification circuit
Multiple is set to 50 times；The multiplication factor of the second level and third level signal amplification circuit is respectively set to 10 times.
Described acoustic signal receives in pretreatment module circuit and filters by one-stage low-pass filter and one-level high-pass filter
Constitute.The cut-off frequency of low pass filter is 100khz, feeds back low pass filter including quadravalence Chebyshev filter and multiterminal
Circuit；The cut-off frequency of high-pass filter is 50khz, including quadravalence Chebyshev filter and multiterminal feedback high-pass filter electricity
Road；Low pass filter and high-pass filter collectively form the bandpass filter with a width of 50khz to 100khz.
In the present embodiment, described dsp signal processing module circuit is the embedded system that low-power consumption high speed dsp is constituted
System, completes acoustic signal and receives and time delay calculating.Master control mould in dsp signal processing module circuit and described communication control circuit
Block circuit Direct Communication, reads and receives configuration information, and result is sent in main control module circuit in time.
As shown in figure 5, dsp signal processing module circuit includes:
Dsp, cpld(complex programmable logic device, CPLD), flash
(flash memory) and ad(modulus) converter；
Wherein dsp combines cpld, and ad converter completes the collection of signal data and algorithm calculates.When dsp completes data meter
After calculation, transfer data to described main control module circuit.
Described dsp is the core in dsp signal processing module circuit, is used for completing algorithm time delay calculating, data is led to
News and signals collecting control.In view of the power consumption reducing acoustic receiver module, select low-power consumption dsp, the operating frequency of dsp is
200mhz.
After described dsp completes reset and software initialization, by spi(Serial Peripheral Interface (SPI)) notify described main control module electricity
Road, then described main control module circuit test configurations data is downloaded to described dsp by spi interface, test is joined by described dsp
Put data and be converted to operating parameter, then send response message, wait the test command of described main control module circuit.When receiving
After the test command of described main control module circuit, described dsp receives pretreatment mould according to the described acoustic signal of work schedule collection
The signal of block circuit output, the signal of collection is calculated using matched filtering algorithm, obtains corresponding signal lag, then
Time delay result of calculation is obtained by described ad converter, is passed back to described main control module circuit.
Described ad converter selects 24 snr(signal to noise ratios) converter, soon, noise is low for this ad converter conversion rate.Turn
The control interface of parallel operation includes data conversion clock interface, data transfer clock interface, data transmission interface.In order to accurate
Data acquisition, by data conversion clock design divided by cpld after provide, ad conversion frequency be 500khz；Data transfer
Clock interface data coffret is connected with described dsp, provides data transfer clock by described dsp.
Described cpld is mainly used in dividing the data conversion clock obtaining described ad converter and changes flash page address
Function.Cpld is provided that accurate sampling clock, so producing accurately and reliably sample conversion clock in cpld.In combination with
The address pins of described dsp, produce different flash addresses and control.Design to cpld software can adopt vhdl language and figure
The mode that frame combines.Visual pattern complete the frequency dividing of clock and the conversion of signal.
Described flash is mainly used in realizing code storage, and sample of signal stores the functions such as the storage of data list.
Certainly, the present invention also can have other various embodiments, in the case of without departing substantially from present invention spirit and its essence, ripe
Know those skilled in the art and work as and various corresponding changes and deformation can be made according to the present invention, but these corresponding changes and change
Shape all should belong to the scope of the claims of the present invention.
Claims (8)
1. a kind of horizontal bird acoustic receiver module is it is characterised in that include:
Acoustic signal receiving unit and acoustic transducer；
Described acoustic signal receiving unit includes:
Digital signal processor dsp receiving circuit, is connected with described acoustic transducer；
Communication control circuit, is connected with the communication coil in horizontal bird, and interacts with described dsp receiving circuit；
Described acoustic transducer includes:
Piezoelectric ceramic ball shell, surfaces externally and internally scribbles electrode, in thickness direction polarization；
Service outlet, for exporting the acoustic signal that described piezoelectric ceramic ball shell produces；
Described communication control circuit includes:
Main control module circuit, electric power management circuit and frequency shift keying fsk communication module circuit；
Described main control module circuit is used for carrying out communications protocol interaction, data conversion, work schedule management and power management；Work as sound
When signal receiving unit does not work, main control module circuit is in low-power consumption standby listening state, and indicates described power management
The working power of fsk communication module circuit and dsp receiving circuit in circuitry cuts acoustic signal receiving unit；Upper when receiving
After the work order of machine, indicate that described electric power management circuit restores electricity；
Described fsk communication module circuit is capable of identify that for the fsk issuing modulated signal is demodulated to described main control module circuit
Protocol instructions be sent to described main control module circuit；And the protocol data of main control module circuit upload is converted into fsk modulation
Signal sends into physical channel.
2. acoustic receiver module as claimed in claim 1 is it is characterised in that described fsk communication module circuit includes:
Micro-control unit mcu, fsk signal receiving circuit, fsk signal sending circuit；
Described mcu is used for carrying out the modulation /demodulation of fsk signal；
Described fsk signal receiving circuit includes being sequentially connected: the first signal amplification circuit, signal filter circuit and mixing electricity
Road, low pass filter；
Described fsk signal sending circuit includes: secondary signal amplifying circuit, power amplification circuit and resonance circuit；Described second
Signal amplification circuit is made up of amplifier, and the signal receiving from described mcu is amplified；Signal after amplification is through described power
Amplifying circuit drives described resonance circuit, produces fsk modulation output signal, is sent to described communication coil.
3. acoustic receiver module as claimed in claim 2 it is characterised in that:
Described first signal amplification circuit total magnification is 1000 times, is completed by each 10 times of amplifying circuit of three-level；
The square-wave signal of the fsk modulated signal of reception and 20khz is mixed by described mixting circuit by analog switch；
The cut-off frequency of described low pass filter is 15khz；
Described signal filter circuit is made up of one-stage low-pass filter and one-level high-pass filter；The cut-off frequency of low pass filter
For 40khz, the Chebyshev filter including two ranks and multiterminal feedback low-pass filter circuit；The cut-off frequency of high-pass filter
For 17khz, the Chebyshev filter including two ranks and multiterminal feedback circuit of high pass filter.
4. acoustic receiver module as claimed in claim 1 is it is characterised in that described dsp receiving circuit includes:
Acoustic signal receives pretreatment module circuit, and the acoustic signal for exporting to described acoustic transducer is filtered and puts
Greatly；
Dsp signal processing module circuit, the signal for receiving pretreatment module circuit output according to acoustic signal enters line delay
Calculate, result is exported to described main control module circuit.
5. acoustic receiver module as claimed in claim 4 is it is characterised in that described acoustic signal receives pretreatment module circuit
Including:
First order signal amplification circuit, the acoustic signal for exporting to described acoustic transducer is amplified；
Low pass filter, the signal for exporting to described first order signal amplification circuit carries out LPF；
Second level signal amplification circuit, is amplified to the signal after LPF；
High-pass filter, the signal for exporting to described second level signal amplification circuit carries out high-pass filtering；
Third level signal amplification circuit, is amplified to the signal after high-pass filtering；
Collection signal buffer, the signal for exporting to described third level signal amplification circuit enters row buffering and exports to described
Dsp signal processing module circuit.
6. acoustic receiver module as claimed in claim 5 it is characterised in that:
Described first, second and third grade of signal amplification circuit is made up of low-power consumption, the operational amplifier of low noise, and first order signal is put
The multiplication factor of big circuit is set to 50 times；The multiplication factor of the second level and third level signal amplification circuit is respectively set to 10 times；
The cut-off frequency of described low pass filter is 100khz, feeds back LPF including quadravalence Chebyshev filter and multiterminal
Device circuit；The cut-off frequency of described high-pass filter is 50khz, including quadravalence Chebyshev filter and multiterminal feedback high pass filter
Ripple device circuit.
7. acoustic receiver module as claimed in claim 6 is it is characterised in that described dsp signal processing module circuit includes:
Dsp, CPLD cpld, flash memory and analog-digital converter；
After described dsp completes reset and software initialization, described main control module circuit is notified by Serial Peripheral Interface (SPI), and downloads
Test configurations data；After receiving the test command of described main control module circuit, according to work schedule collection described acoustics letter
Number receive the signal of pretreatment module circuit output, the signal of collection is calculated using matched filtering algorithm, obtains corresponding
Signal lag, then time delay result of calculation is obtained by described analog-digital converter, is passed back to described main control module circuit；
Described cpld is used for the data conversion clock that frequency dividing obtains described analog-digital converter, and conversion flash memory page addresses；
Described flash memory is used for preserving sample of signal.
8. acoustic receiver module as claimed in claim 7 it is characterised in that:
24 signal to noise ratio converters selected by described analog-digital converter, and control interface includes data conversion clock interface, data transfer
Clock interface, data transmission interface；Wherein said data conversion clock interface is connected with described cpld, described data transfer clock
Interface data coffret is connected with described dsp.
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| CN2809661Y (en) * | 2005-03-18 | 2006-08-23 | 中海油田服务股份有限公司 | Distributed seaquake exploration towrope |
| GB2424949A (en) * | 2005-04-08 | 2006-10-11 | Westerngeco Seismic Holdings | Controlling the vertical and horizontal positions of streamers in an over/under configuration |
| CN201143494Y (en) * | 2008-01-11 | 2008-11-05 | 中国石油天然气集团公司 | Large power acoustic emission transducer |
| CN101685164A (en) * | 2008-09-25 | 2010-03-31 | 嘉兴中科声学科技有限公司 | Subaqueous multi-cable positioning system and method thereof. |
| CN101793965A (en) * | 2010-02-08 | 2010-08-04 | 中国石化集团胜利石油管理局地球物理勘探开发公司 | Acoustic positioning system of shallow sea wave detector |
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