CN107132570A - Digital hydrophone system - Google Patents
Digital hydrophone system Download PDFInfo
- Publication number
- CN107132570A CN107132570A CN201710376061.1A CN201710376061A CN107132570A CN 107132570 A CN107132570 A CN 107132570A CN 201710376061 A CN201710376061 A CN 201710376061A CN 107132570 A CN107132570 A CN 107132570A
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- analog
- dsp chip
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- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 18
- 238000013500 data storage Methods 0.000 claims abstract description 15
- 239000010935 stainless steel Substances 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 230000005236 sound signal Effects 0.000 claims abstract description 7
- 238000001228 spectrum Methods 0.000 claims description 8
- 239000013078 crystal Substances 0.000 claims description 6
- 239000000919 ceramic Substances 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 239000010959 steel Substances 0.000 claims 1
- 238000004458 analytical method Methods 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241001274660 Modulus Species 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000007726 management method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/186—Hydrophones
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/38—Seismology; Seismic or acoustic prospecting or detecting specially adapted for water-covered areas
- G01V1/3808—Seismic data acquisition, e.g. survey design
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Oceanography (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of digital hydrophone system, provided with Stainless Steel Shell, in addition to underwater sound sensor and the preamplifier, high-pass filter, analog-digital converter, signal processor and the data storage that are built in Stainless Steel Shell.The signal processor includes dsp chip and the peripheral circuit electrically connected with the dsp chip, the underwater sound sensor, preamplifier are connected, high-pass filter, analog-digital converter are sequentially connected, the signal output part of the analog-digital converter is bi-directionally connected with the dsp chip, the data storage is bi-directionally connected with the dsp chip, and the signal processor connects display by data cable.The display is used to show the contents such as the time-domain information and frequency domain information of underwater sound signal, and to observe the time domain and frequency domain information structure of underwater sound signal, solid foundation is provided for further signal analysis.
Description
Technical field
The invention belongs to underwater exploration technical field, and in particular to a kind of digital hydrophone system.
Background technology
It is transducer generally by scales in underwater sound field, and receive transducer can be described as hydrophone.Hydrophone is
Underwater sound signal is converted to a kind of transducer of electric signal, its to human research's complex environment under water, target fixation and recognition,
Subsurface communication navigation, underwater noise measurement etc. are multi-field to be respectively provided with important function, therefore in Underwater Acoustics Engineering, hydrophone is located always
In a basic status.Traditional hydrophone is only used as sensor, and the simulation for typically directly exporting sensor is believed
Number（Or after amplification）The mode for being transmitted and handling, but signal is vulnerable to the length of wire, external environment in transmitting procedure
The interference of noise, and need the complexity such as preamplifier, wave filter, signal conditioning circuit, signal acquisition circuit, oscillograph to set
Standby come together collection, the feature of signal Analysis, while traditional hydrophone is not also controlled, record storage, signal display function.
The main development direction of present hydrophone is digitlization, networking, systematization, and it is basis to digitize.
The content of the invention
There is provided a kind of digital hydrophone system for situation of the invention for prior art.
The present invention uses following technical scheme, and the digital hydrophone system is provided with Stainless Steel Shell, in addition to the underwater sound is passed
Sensor and it is built in preamplifier, high-pass filter, analog-digital converter, signal processor and the data of Stainless Steel Shell and deposits
Reservoir, wherein：
The signal processor includes dsp chip and the peripheral circuit electrically connected with the dsp chip, and the peripheral circuit includes
SDRAM, FLASH, crystal oscillator and reset chip, above-mentioned crystal oscillator connect the analog-digital converter simultaneously；
The signal output part of the underwater sound sensor is connected with the preamplifier, the signal output part of the preamplifier
The high-pass filter is connected, the signal output part of the high-pass filter connects the analog-digital converter, the analog-to-digital conversion
The signal output part of device is bi-directionally connected with the dsp chip, and the data storage is bi-directionally connected with the dsp chip；
The preamplifier has high-gain passage and low-gain channel, the gain of the high-gain passage and low-gain channel
Differ 40dB.
According to above-mentioned technical proposal, the digital hydrophone system also includes display and data cable, the letter
Number processor connects outer computer by data cable so that the data storage is identified as may move by computer
Storage device.
According to above-mentioned technical proposal, above computer matching has display end software, for showing that the time domain of underwater sound signal is believed
Breath and frequency domain information.
According to above-mentioned technical proposal, above-mentioned time-domain information includes time domain waveform, peak value statistical signal and average value statistics letter
Number, above-mentioned frequency domain information includes frequency-domain waveform, signal spectrum level and power spectrum.
According to above-mentioned technical proposal, the Stainless Steel Shell is in thin walled cylindrical, and its two ends is covered with closure, closure
Two layers of watertight rubber ring is built-in with, the bottom of closure is connected with the underwater sound sensor, top and the watertight of closure are patched
Part is connected.
According to above-mentioned technical proposal, the Stainless Steel Shell is integrally formed using 316 stainless steels and is made, and its outer surface has
Groove.
According to above-mentioned technical proposal, the underwater sound sensor uses piezoelectric ceramic hydrophone, and the analog-digital converter is used
The Sigma-Delta ADC of 24 bits, the dsp chip is using the double MAC of 16 fixed points dsp chip, the data storage
Using TF data cards.
According to above-mentioned technical proposal, data signal isolating chip is provided between the analog-digital converter and signal processor.
According to above-mentioned technical proposal, the signal processor has two kinds of programmable wave filters, including the programmable filters of FIR
Ripple device and IIR programmable filters.
According to above-mentioned technical proposal, the data cable includes usb line and power line, the usb line
Vulcanize with power line in same watertight cable.
Digital hydrophone system disclosed by the invention, its advantage is, before no longer being needed compared with traditional hydrophone
Put amplifier, wave filter, signal acquisition circuit etc. and use the complex device needed for hydrophone, it is proposed that a kind of digitized water is listened
Device system.
Brief description of the drawings
Fig. 1 is the structural representation of the preferred embodiment of the present invention.
Fig. 2 is the fundamental diagram of the preferred embodiment of the present invention.
Fig. 3 is the function structure chart of the preferred embodiment of the present invention.
Reference includes：10- Stainless Steel Shells；11- closures；12- watertight rubber rings；13- underwater electrical connectors；20-
Underwater sound sensor；30- preamplifiers；31- high-gain passages；32- low-gain channels；40- high-pass filters；50- moduluses turn
Parallel operation；60- signal processors；61-DSP chips；62- peripheral circuits；70- data storages；80- displays；90- data transfers
Cable.
Embodiment
The invention discloses a kind of digital hydrophone system, with reference to preferred embodiment, the specific implementation to the present invention
Mode is further described.
Referring to Fig. 2 of accompanying drawing, it is preferable that the digital hydrophone system is provided with Stainless Steel Shell 10, the digital water is listened
Device system also includes connecting the underwater sound sensor 20 of Stainless Steel Shell 10, preamplifier 30, high-pass filter 40, analog-to-digital conversion
Device 50, signal processor 60 and data storage 70.
Referring to Fig. 1 of accompanying drawing, it is preferable that the Stainless Steel Shell 10 is integrally formed using 316 stainless steels and is made, and has it
There are more preferable airtight waterproof performance, decay resistance and elevated temperature strength performance.Preferably, the Stainless Steel Shell 10 is in thin-wall circular
Cylindricality, its two ends are covered with closure 11, and closure 11 is built-in with two layers of watertight rubber ring 12, the bottom of closure 11 with it is described
Underwater sound sensor 20 is connected, and the top of closure 11 is connected with underwater electrical connector 13.Preferably, the Stainless Steel Shell 10 is outer
Surface has groove 14, available for lash rope or anchor ear fixing equipment.
Referring to Fig. 3 of accompanying drawing, the signal output part of the underwater sound sensor 20 is connected with the preamplifier 30.It is preferred that
Ground, the underwater sound sensor 20 uses piezoelectric ceramic hydrophone, with level is comprehensive, ball-type, a wide range of frequencies of 10Hz ~ 80kHz
Underwater sound signal is converted to voltage signal by wide the features such as, the piezoelectric ceramics of piezoelectric ceramic hydrophone.
Preferably, the preamplifier 30 of low noise has high-gain passage 31 and low-gain channel 32.It is different from
Traditional hydrophone adds the method put before fixed gain to solve anti-interference problem, and the preamplifier 30 can be increased substantially
Signal receives dynamic range.The gain difference 40dB of the high-gain passage 31 and low-gain channel 32, the low-gain channel
32 are mainly used in measuring high sound source level signal, including explosive sound, sonar signals etc., and the high-gain passage 31 has relatively low
Self noise, be mainly used in measuring faint sound-source signal, including ambient noise, sailing noise etc..
Preferably, the signal output part of the preamplifier 30 connects the high-pass filter 40.The high-pass filtering
Device 40 is used to filter out low frequency signal interference, and when monitoring signals are in high band, the high-pass filter 40 can effectively filter out low
The interference signal of frequency range.
Preferably, the signal output part of the high-pass filter 40 connects the analog-digital converter 50.The analog-to-digital conversion
Device 50 uses the Sigma-Delta ADC of high performance 24 bit, and sampling rate is big with dynamic range up to 192ksps, right
The noise suppressed of high frequency is good, it is not necessary to the advantages of complicated frequency overlapped-resistable filter.
Preferably, the signal processor 60 includes dsp chip 61 and the peripheral circuit electrically connected with the dsp chip 61
62, the signal output part of the high-pass filter 40 is bi-directionally connected with the dsp chip 61.Preferably, the dsp chip 61 is adopted
With the double MAC of 16 fixed points of TI companies dsp chip, with 60MHz~120MHz clock frequencies, 320K byte zero-waiting shapes
On state piece the features such as RAM, and with abundant peripheral hardware resource, the peripheral circuit 62 includes SDRAM, FLASH, crystal oscillator and answered
Position chip, above-mentioned crystal oscillator connects the analog-digital converter 50 simultaneously.
Preferably, the signal processor 60 has two kinds of programmable wave filters, including FIR programmable filters and
IIR programmable filters, filter length and coefficient are controllable, can be handled using wave filter, can also bypass filter.
Pre-processed by above-mentioned wave filter, can effectively remove interference, preferably extract the characteristic information of signal.
Preferably, the data storage 70 is bi-directionally connected with the dsp chip 61, and the data storage 70 is used for water
The stored record of acoustical signal and after-treatment.Preferably, the data storage 70 is preferred to use TF data cards, with small volume
The features such as capacity is big, 256GB capacity is arrived in maximum support.TF data cards preserve data using FATFS file system formats, store number
Named according to filename according to the holding time, data directory uses and is used as catalogue using " date " under two-stage catalogue form, root
Data file preserves a file, the high low gain two of data content in one minute with " Hour Minute Second " for filename under name, subdirectory
Individual passage is alternately preserved.
Further, the digital hydrophone also includes display（Display end）80 and data cable 90, the letter
Number processor 60 passes through data cable 90 and connects display 80.Preferably, data cable uses the long line skills of USB2.0
Art is transmitted, and operating distance is up to 70 meters, and usb line and power line are vulcanized on same watertight cable.Traditional
Hydrophone is simulation small-signal due to transmission, there is signal attenuation, the defect such as is easily disturbed, it is impossible to carry out long line biography
It is defeated, and digital hydrophone transmission is data signal, it is general to be carried out data transmission using USB or Ethernet.USB data transmission
Generally no greater than 5 meters of distance, the data transfer utilizes USB extended line control chips, and usb signal is changed into network signal, in
Between be transmitted using 5 classes or super category 5 twisted pair, substantially prolongs transmission range, extend the use model of digital hydrophone
Enclose.
Further, the display 80 can also further connect outside controlling equipment, such as computer, the display
80 also can as the outside controlling equipment by representative of computer part.Meanwhile, the digital hydrophone system is in itself
Also outside controlling equipment, such as computer can be directly connected to.When digital hydrophone system is connected with computer, the data are deposited
Reservoir 70 can be identified as movable memory equipment, and the file management system that computer can be used directly in operating personnel accesses storage
In the related data of TF data cards, operating personnel also can control the data storage 70 only to preserve a passage by computer
Data., can be using making by oneself when the signal processor 60 is with outside controlling equipment software message communication by representative of computer
The message format of justice.Self-defined message adds frame head and data verifying function, and message content includes system mode self-inspection, set
Acquisition parameter, data acquisition start and stopped, data preservation starts and stopped, digital independent starts and stopped, data are wiped, soft
Part online upgrading etc..
Further, it is transmitted using USB2.0 technologies, digital hydrophone system can be patched directly on computer,
As a peripheral hardware of computer, similar to the sound card of USB interface.It is powered, is passed using the USB port power supply of computer simultaneously
During defeated by boosting, be depressured there is provided giving hydrophone power supply, the need for reducing external power source.Digital hydrophone is made simultaneously
For a USB peripheral, multiple hydrophones can be worked simultaneously, and the ambient noise information of multiple measurement points can be monitored simultaneously.
Further, in order to reach purpose that background electrical noise is low, a series of noise reduction measure is taken.For example, to mould
Intend isolation and filtering process that power supply has carried out power supply, solve the interference of power supply noise.Preferably, the analog-digital converter 50 with
Data signal isolating chip is set up between signal processor 60（Not shown in figure）, make the analog portion and numerical portion of the present invention
Isolation, has obstructed interference of the switching noise to signal.It is simultaneously targeted to select the preamplifier of low noise, take into account electric current
The influence of noise and voltage noise, especially inhibits the current noise of low-frequency range.
Further, the outside controlling equipment matching by representative of computer has special display end software, for showing
The contents such as the time-domain information and frequency domain information of underwater sound signal.Waveform is typically monitored using oscillograph different from traditional hydrophone, this
The digital hydrophone system of invention is shown in real time by gathering original waveform and uploading in real time on the display end software of computer
Show time domain waveform and frequency-domain waveform, these data can store backup simultaneously for used in later analysis.Outside controlling equipment may be used also
So that the data inputted in real time are converted into power spectrum data, so as to further analytical acoustics signal.
Further, the display end software when domain-functionalities including time domain waveform show and signal characteristic statistics etc. in
Hold.Wave data is shown hydrophone and receives original signal amplitude and time relationship.Display end software can be with control data
Storage, time domain data can preserve into .WAV files, be played available for other audio playing softwares or further processing.When
The signal characteristic statistics in domain includes peakvalue's checking and average detection, and the data Time-domain Statistics characteristic in a period of time is carried out
Calculate and show.
Further, power spectrum of the frequency domain function of the display end software including signal is shown, window function is chosen.To defeated
The signal subsection entered carries out FFT processing, and by being compensated to result, the signal spectrum level in some frequency is shown in real time.
Result is compensated refer to compensate different frequency under the conditions of hydrophone receiving sensitivity difference.Display end software is
FFT processing functions provide various window functions, in order to when data are transformed into frequency domain the leakage of reduction frequency spectrum there is provided window
Function includes rectangular window, quarter window, HANNING windows, the conventional window function such as HAMMING windows., can by the processing and display of frequency domain
To observe the frequency domain information structure of signal, solid foundation is provided for further analysis.
For a person skilled in the art, the technical scheme described in foregoing embodiments can still be repaiied
Change, or equivalent substitution is carried out to which part technical characteristic, within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in protection scope of the present invention.
Claims (10)
1. a kind of digital hydrophone system, it is characterised in that provided with Stainless Steel Shell, in addition to underwater sound sensor and it is built in
Preamplifier, high-pass filter, analog-digital converter, signal processor and the data storage of Stainless Steel Shell, wherein：
The signal processor includes dsp chip and the peripheral circuit electrically connected with the dsp chip, and the peripheral circuit includes
SDRAM, FLASH, crystal oscillator and reset chip, above-mentioned crystal oscillator connect the analog-digital converter simultaneously；
The signal output part of the underwater sound sensor is connected with the preamplifier, the signal output part of the preamplifier
The high-pass filter is connected, the signal output part of the high-pass filter connects the analog-digital converter, the analog-to-digital conversion
The signal output part of device is bi-directionally connected with the dsp chip, and the data storage is bi-directionally connected with the dsp chip；
The preamplifier has high-gain passage and low-gain channel, the gain of the high-gain passage and low-gain channel
Differ 40dB.
2. digital hydrophone system according to claim 1, it is characterised in that the digital hydrophone system also includes aobvious
Show device and data cable, the signal processor is connected to computer by data cable so that the data are deposited
Reservoir is identified as movable memory equipment by computer.
3. digital hydrophone system according to claim 2, it is characterised in that above computer matching has display end soft
Part, time-domain information and frequency domain information for showing underwater sound signal.
4. digital hydrophone system according to claim 3, it is characterised in that above-mentioned time-domain information include time domain waveform,
Peak value statistical signal and average value statistical signal, above-mentioned frequency domain information include frequency-domain waveform, signal spectrum level and power spectrum.
5. digital hydrophone system according to claim 1, it is characterised in that the Stainless Steel Shell is in thin wall cylindrical
Shape, its two ends are covered with closure, and closure is built-in with two layers of watertight rubber ring, the bottom of closure and the underwater sound sensor
It is connected, the top of closure is connected with underwater electrical connector.
6. the digital hydrophone system according to any claim in claim 1 or 5, it is characterised in that it is described not
Rust steel sheel is integrally formed using 316 stainless steels to be made, and its outer surface has groove.
7. digital hydrophone system according to claim 1, it is characterised in that the underwater sound sensor uses piezoelectric ceramics
Hydrophone, the analog-digital converter uses the Sigma-Delta ADC of 24 bits, and the dsp chip is using the double MAC of 16 fixed points
Dsp chip, the data storage use TF data cards.
8. digital hydrophone system according to claim 1, it is characterised in that the analog-digital converter and signal processor
Between be provided with data signal isolating chip.
9. the digital hydrophone system according to any claim in claim 1 or 8, it is characterised in that the letter
Number processor has two kinds of programmable wave filters, including FIR programmable filters and IIR programmable filters.
10. digital hydrophone system according to claim 2, it is characterised in that the data cable connects including USB
Mouth line and power line, the usb line and power line vulcanize in same watertight cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710376061.1A CN107132570A (en) | 2017-05-25 | 2017-05-25 | Digital hydrophone system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710376061.1A CN107132570A (en) | 2017-05-25 | 2017-05-25 | Digital hydrophone system |
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| Publication Number | Publication Date |
|---|---|
| CN107132570A true CN107132570A (en) | 2017-09-05 |
Family
ID=59732690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710376061.1A Pending CN107132570A (en) | 2017-05-25 | 2017-05-25 | Digital hydrophone system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111693130A (en) * | 2020-06-20 | 2020-09-22 | 王茂法 | Marine environment noise measurement system |
| CN111780862A (en) * | 2020-07-20 | 2020-10-16 | 中国计量大学 | Very low frequency self-contained piezoelectric hydrophone |
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Cited By (2)
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| CN111780862A (en) * | 2020-07-20 | 2020-10-16 | 中国计量大学 | Very low frequency self-contained piezoelectric hydrophone |
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Application publication date: 20170905 |