CN206057253U - A kind of acoustic characteristic measurement apparatus - Google Patents
A kind of acoustic characteristic measurement apparatus Download PDFInfo
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- CN206057253U CN206057253U CN201620696610.4U CN201620696610U CN206057253U CN 206057253 U CN206057253 U CN 206057253U CN 201620696610 U CN201620696610 U CN 201620696610U CN 206057253 U CN206057253 U CN 206057253U
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Abstract
The utility model discloses a kind of acoustic characteristic measurement apparatus, including host computer, sampling tube, acoustic transducer, hydrophone group, sonic apparatus；Sonic apparatus receives the first signal for carrying test waves type that the test waves type of the basis currently input that host computer sends is generated, and acoustic transducer is sent to according to the corresponding test waves of the first signal triggering generation, test waves are converted into corresponding first sound wave and are injected in the testing sample in sampling tube by acoustic transducer, each hydrophone in hydrophone group gathers the first sound wave and the corresponding sound wave for being formed is generated corresponding signal and sends to sonic apparatus, sonic apparatus is amplified and processes and generate corresponding signal and send to host computer, the corresponding signal that host computer is generated when being water or deposit based on testing sample, parsed and calculated the acoustic characteristic of deposit in water.The accuracy of result when ensure that sediment acoustics characteristic is measured in water based on above-mentioned acoustic characteristic measurement apparatus.
Description
Technical field
This utility model is related to acoustic sounding technical field, more particularly to a kind of acoustic characteristic measurement apparatus.
Background technology
It is covered with deposit in wide rivers,lakes and seas, the acoustic characteristic of deposit is the deposit that research is present in water
Most efficient method.By taking bottom sediment as an example, which is the important object of marine physics and engineering research, its Research of Acoustic
The attention of Chinese scholars is enjoyed always, is ships navigation, submarine moves under water, seabed resources are detected, ocean engineering operation etc. is necessary
The characteristic known and understand.Seabed sediment acoustics characteristic includes two main characterisitic parameters：Rate of sound and attenuation of sound, wherein,
The velocity of sound reflects the speed degree that sound wave is propagated in seabed, and acoustic attenuation reflects sediment to sonic propagation or ground seismic wave function
The impact of distance.
Mainly there are three kinds of acoustic telemetry, in site measurement and sampled measurements to the acoustic measurement method of deposit in liquid at present
Method, wherein, acoustic telemetry method need the acoustic characteristic that in-situ measuring method and sampled measurements method are obtained as analysis according to
According to and judgment criteria.In site measurement is carried out to deposit in liquid needs special acoustic measuring instrument in situ, and current original
The frequency of position measuring instrument measurement is limited, it is impossible to realizes the needs of various acoustic characteristic measurements and there is sampling and secondary operation
Problem, although therefore acoustic measurement method high precision high cost in situ, time-consuming height, study limitation's property are big.Therefore, pass through
Sampled measurements method gathers sediment sample, and then measuring in laboratory becomes wide variety of method.
During laboratory measurement, for the measurement of acoustic attenuation coefficient generally adopts coaxial distance measurement method.Same between centers
Need to split sample, mobile transducer away from measurement method, this just destroys the agent structure of sample.In addition, current acoustic attenuation system
Number measuring method does not verify divergence loss in a liquid, the error brought due to eliminating diffusion, therefore can produce
Larger error.For the measurement of the velocity of sound is generally received using one one, as the interference that there is many way paths sound wave and ski-jump are missed
Difference, so as to cause the inaccurate of acoustic velocity measutement result.
In view of this, existing technical scheme is when in liquid, sediment acoustics characteristic is measured, it is impossible to ensure to survey
The accuracy of amount result.
Utility model content
To solve above-mentioned technical problem, this utility model provides a kind of acoustic characteristic measurement apparatus, existing to solve
Technical scheme is when in liquid, sediment acoustics characteristic is measured, it is impossible to ensure the problem of the accuracy of measurement result.Skill
Art scheme is as follows：
A kind of acoustic characteristic measurement apparatus, including：
The sampling tube being arranged in measurement bracket, for placing testing sample；
The sonic apparatus that first receiving terminal and the first outfan are connected with host computer, the second outfan of the sonic apparatus and acoustics
The input of transducer is connected, and the second receiving terminal is connected with the outfan of each hydrophone in hydrophone group, upper for receiving
The first signal for carrying test waves type that the test waves type of the basis that machine sends currently input is generated, and taken according to described
The corresponding test waveform signal of the first signal generation with test waves type is sent to the acoustic transducer；
The acoustic transducer being placed horizontally in the measurement bracket, the outfan of the acoustic transducer with it is described
The end coupling of testing sample described in sampling tube is connected, for the test waveform signal is converted into corresponding first sound wave
And inject in the testing sample in the sampling tube；
The hydrophone group be vertically arranged in the measurement bracket and in the hydrophone group each hydrophone sampling
End is inserted in the longitudinal end of the sampling tube, for the measurement process when the testing sample is liquid in, gather described the
The second sound wave that one sound wave is formed after the liquid, and generate corresponding secondary signal and send to the sonic apparatus；And
In measurement process when the testing sample is deposit, gather that first sound wave formed after the deposit the
Three sound waves, and generate corresponding 4th signal and send to the sonic apparatus, wherein, including at least setting side by side in the hydrophone group
Put and be spaced first hydrophone and the second hydrophone of predeterminable range；
The host computer being connected with the sonic apparatus, for receiving amplifiedization described second that the sonic apparatus sends
3rd signal of signal generation, and the 5th signal of amplifiedization 4th signal generation, to the 3rd signal and institute
State the 5th signal to be parsed, and calculate the acoustic characteristic of deposit described in the liquid.
Preferably, the hydrophone group includes：Pin type hydrophone group.
Preferably, the host computer includes：
For storing the predeterminable range in the hydrophone group between each hydrophone, the 3rd signal and institute
State the memorizer of the 5th signal；
It is connected with the memorizer, for being parsed and being calculated the liquid to the 3rd signal and the 5th signal
The processor of the acoustic characteristic of deposit described in body.
Preferably, the processor is specifically included：
Waveform processor, for parsing the 3rd signal and the 5th signal, obtains corresponding acoustic waveform, judges
The position of ski-jump in the acoustic waveform, and the waveform in default n cycle that starts using on the basis of ski-jump is chosen as having
Effect ripple, obtains the significant wave in the hits of the first default characteristic point and the sound pressure amplitude in the second default characteristic point, wherein,
The span of n is the integer more than 0, and specially 3, described first presets characteristic point includes zero point, peak point and/or peak valley
Point, the described second default characteristic point is the peak point；
The first computer being connected with the waveform processor, for based on the 3rd signal correspondence
Significant wave the described first default characteristic point sampling number, the very first time calculated in the liquid is poorWherein, subscript j represents first hydrophone, and subscript k is represented
Second hydrophone, a are the sum of zero sample points ZP in the corresponding significant wave of the 3rd signal, and b is the described 3rd
The sum of peak point sampling number PP in the corresponding significant wave of signal, c are peak valley point in the corresponding significant wave of the 3rd signal
The sum of sampling number DP, TSTo obtain the cycle of sampling number；
The second computer being connected with first computer, for differing from Δ t according to the very first time1, calculate described
Sound time delay Δ t in liquid0=cw0/d0-Δt1, wherein, cw0For the standard velocity of sound, d0For first hydrophone and described second
The predeterminable range between hydrophone；
The 3rd computer being connected with the waveform processor, for according to the 3rd signal correspondence
Significant wave in the sound pressure amplitude of the described second default characteristic point, calculate the first acoustic attenuation coefficient in the liquidWherein, APPiDescribed in i-th in the corresponding significant wave of the 3rd signal, second presets
The sound pressure amplitude of characteristic point；
The 4th computer being connected with the waveform processor, for corresponding based on the 5th signal
Significant wave calculates the second time difference in the deposit in the sampling number of the described first default characteristic pointWherein, during m is the corresponding significant wave of the 5th signal
Zero sample is counted the sum of ZP, and n is the sum of peak point sampling number PP in the corresponding significant wave of the 5th signal, and l is
In the corresponding significant wave of 5th signal, peak valley point sampling is counted the sum of DP；
The 5th computer being connected with the waveform processor, for corresponding according to the 5th signal
Significant wave calculates the second acoustic attenuation coefficient in the deposit in the sound pressure amplitude of the described second default characteristic pointWherein, APPiThe second default spy described in i-th in the corresponding significant wave of the 5th signal
Levy sound pressure amplitude a little；
The 6th computer being connected with second computer and the 4th computer, for based on the sound time delay Δ
t0With the second time difference Δ t2, calculate velocity of sound c in the acoustic characteristic of deposit described in the liquidp=d0/(Δt2-
Δt0)；
The 7th computer being connected with the 3rd computer and the 5th computer, for declining according to first sound
Subtract factor alpha1With the second acoustic attenuation coefficient α2, calculate the acoustic attenuation system in the acoustic characteristic of deposit described in the liquid
Number αp=α2-α1。
Preferably, the acoustic transducer includes：The narrow frequency acoustic transducer of predeterminated frequency or wideband acoustic transducer.
Preferably, the measurement bracket includes：Base, the support block being arranged on the base and support and it is arranged at institute
State the connecting rod on support.
Preferably, the host computer includes：Computer, notebook or flat board.
From above-mentioned technical proposal as can be seen that this utility model provides a kind of acoustic characteristic measurement apparatus, including host computer,
Sampling tube, acoustic transducer, hydrophone group, sonic apparatus；Sonic apparatus receives the test waves of the basis currently input that host computer sends
The first signal for carrying test waves type that type is generated, and sent according to the corresponding test waveform signal of the first signal generation
To acoustic transducer；Test waveform signal is converted into corresponding first sound wave and is injected to be measured in sampling tube by acoustic transducer
In sample；Each hydrophone in hydrophone group gathers sound wave the corresponding letter of generation that the first sound wave is formed after testing sample
Number send to sonic apparatus；Sonic apparatus is sent to host computer after being amplified process；Host computer is to being liquid or heavy when testing sample
The signal that amplifies that sonic apparatus sends during product thing is parsed and is calculated the acoustic characteristic of deposit in liquid.Filled based on above-mentioned measurement
Put the accuracy of result when ensure that sediment acoustics characteristic is measured in liquid.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to implementing
Example or accompanying drawing to be used needed for description of the prior art are briefly described, it should be apparent that, drawings in the following description are only
Only it is embodiment of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work,
Can be with according to the other accompanying drawings of accompanying drawing acquisition for providing.
Fig. 1 is a kind of structural representation of acoustic characteristic measurement apparatus disclosed in this utility model embodiment one；
Fig. 2 is a kind of structural representation of acoustic characteristic measurement apparatus disclosed in this utility model embodiment two；
Fig. 3 is the structural representation of processor in another kind of acoustic characteristic measurement apparatus disclosed in this utility model embodiment two
Figure；
Fig. 4 is a kind of acoustic characteristic measurement apparatus structural representation disclosed in this utility model Sample Scenario one.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only this utility model a part of embodiment, rather than whole
Embodiment.Based on the embodiment in this utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of this utility model protection.
Embodiment one
A kind of acoustic characteristic measurement apparatus disclosed in this utility model embodiment one, its structural representation is as shown in figure 1, sound
Learning characteristic measuring device 100 includes：
The sampling tube 101 being arranged in measurement bracket, for placing testing sample；
The sonic apparatus 103 that first receiving terminal and the first outfan are connected with host computer 102,103 second outfan of sonic apparatus
It is connected with the input of acoustic transducer 104, the second receiving terminal is connected with the outfan of each hydrophone in hydrophone group 105,
For the first letter for carrying test waves type that the test waves type for receiving the basis currently input of the transmission of host computer 102 is generated
Number, and acoustic transducer 104 is sent to according to the corresponding test waveform signal of the first signal generation for carrying test waves type；
The acoustic transducer 104 being placed horizontally in measurement bracket, treats in the outfan of acoustic transducer and sampling tube 101
The end coupling of test sample product is connected, for test waveform signal being converted into corresponding first sound wave and being injected in sampling tube 107
Testing sample in；
Hydrophone group 105 is vertically arranged in measurement bracket and the sampling end of each hydrophone is inserted in hydrophone group 105
In the longitudinal end of sampling tube 107, for, in the measurement process when testing sample is liquid, the first sound wave of collection passes through liquid
The second sound wave for being formed afterwards, and generate corresponding secondary signal and send to sonic apparatus 103；And when testing sample is deposit
Measurement process in, gather the 3rd sound wave that formed by deposit after of the first sound wave, and generate corresponding 4th signal transmission
To sonic apparatus 103, wherein, including at least the first hydrophone and the second water for being arranged side by side and being spaced predeterminable range in hydrophone group
Listen device；
The host computer 102 being connected with sonic apparatus 103, for receiving the amplifiedization secondary signal life of the transmission of sonic apparatus 103
Into the 3rd signal, and the 5th signal of 4th signal generation of amplifiedization parsed to the 3rd signal and the 5th signal,
And calculate the acoustic characteristic of deposit described in liquid.
In technical scheme disclosed in this utility model embodiment, each hydrophone in hydrophone group 105 is by measuring
Rack-mounted clamping fixed and regulation, by keeping spacing distance and inserting stablizing for height, it is ensured that the reception state of each measurement
Concordance.
It should be noted that hydrophone group 105 includes but is not limited to pin type hydrophone group (not shown in figure 1)；It is upper
Machine 102 includes but is not limited to computer, notebook, flat board or other-end, concrete depending on practical situation；Liquid includes sea water
Or fresh water or other test liquids, it is concrete depending on practical situation；Measurement bracket includes：Base, the support being arranged on base
Block and support and the connecting rod being arranged on support；Deposit includes：The deposit such as bottom sediment or rivers lakebed or soil
Or other have the soft deposit shape material that can be inserted hydrophone.
Also, it should be noted that the type of testing sample might not be first liquid in above-mentioned measurement process, it is deposition afterwards
Thing, it is also possible to first deposit is measured, after liquid is measured.
As can be seen here, this utility model is constituted using host computer, sampling tube, acoustic transducer, hydrophone group and sonic apparatus
Acoustic characteristic measurement apparatus.Sonic apparatus is surveyed accordingly based on the first signal generation for carrying test waves type that host computer sends
Examination waveshape signal is sent to acoustic transducer；Test waveform signal is converted into corresponding first sound wave and is injected by acoustic transducer
In testing sample in sampling tube；Hydrophone group gathers sound wave the corresponding letter of generation that the first sound wave is formed after testing sample
Number send to sonic apparatus；Host computer is parsed to the amplification signal that the sonic apparatus when testing sample is liquid or deposit sends
And calculate the acoustic characteristic of deposit in liquid.The deposit sound in liquid be ensure that based on above-mentioned acoustic characteristic measurement apparatus
Learn the accuracy of result when characteristic is measured.
Embodiment two
A kind of acoustic characteristic measurement apparatus and accompanying drawing 1 with reference to disclosed in above-mentioned this utility model embodiment one, this practicality are new
Type embodiment two is also disclosed a kind of acoustic characteristic measurement apparatus, and its structural representation is as shown in Fig. 2 host computer 102 is specifically included：
Memorizer 201 and the processor 202 being connected with memorizer 201, wherein,
Memorizer 201, for storing predeterminable range in hydrophone group between each hydrophone, the 3rd signal and the 5th letter
Number；
Processor 202, the acoustics for deposit in liquid is parsed and calculated to the 3rd signal and the 5th signal are special
Property.
Acoustic characteristic measurement apparatus and accompanying drawing 2, this utility model reality with reference to disclosed in above-mentioned this utility model embodiment two
Apply example three and a kind of acoustic characteristic measurement apparatus are also disclosed, its structural representation is as shown in figure 3, processor 202 includes：Waveform processing
Device 301, the first computer 302 being connected with waveform processor 301, the second computer 303 being connected with the first computer 302,
The 3rd computer 304 being connected with waveform processor 301, the 4th computer 305 being connected with waveform processor 301, and waveform
The 5th connected computer 306 of processor 301, the 6th computer being connected with the second computer 303 and the 4th computer 305
307 and the 7th computer 308 that is connected with the 3rd computer 304 and the 5th computer 306, wherein,
Waveform processor 301, for parsing the 3rd signal and the 5th signal, obtains corresponding acoustic waveform, judges acoustics
The position of ski-jump in waveform, and the waveform in the default n cycle started using on the basis of ski-jump is chosen as significant wave, obtain
Hits and sound pressure amplitude in second default characteristic point of the significant wave in the first default characteristic point, wherein, the span of n is
Integer more than 0, the specially 3, first default characteristic point include zero point, peak point and/or peak valley point, and the second default characteristic point is
The peak point；
First computer 302, for based on the corresponding significant wave of the 3rd signal the first default characteristic point sampling number,
The very first time calculated in liquid is poorWherein, subscript j table
Show the first hydrophone, subscript k represents the second hydrophone, a is the total of zero sample points ZP in the corresponding significant wave of the 3rd signal
Number, b are the sum of peak point sampling number PP in the corresponding significant wave of the 3rd signal, and c is that the 3rd signal is corresponding effectively
The sum of peak valley point sampling points DP, T in rippleSTo obtain the cycle of sampling number；
Second computer 303, for differing from Δ t according to the very first time1, calculate the sound time delay Δ t in liquid0=cw0/d0-Δ
t1, wherein, cw0For the standard velocity of sound, d0For the predeterminable range between the first hydrophone and the second hydrophone；
3rd computer 304, for the corresponding significant wave of the 3rd signal of foundation in the described second acoustic pressure for presetting characteristic point
Amplitude, calculates the first acoustic attenuation coefficient in liquidWherein, APPiIt is corresponding for the 3rd signal
The sound pressure amplitude of i-th second default characteristic points in significant wave；
4th computer 305, for based on the corresponding significant wave of the 5th signal the first default characteristic point sampled point
Number, calculates the second time difference in depositWherein, m is
The sum of zero sample points ZP in the corresponding significant wave of 5th signal, n are adopted for peak point in the corresponding significant wave of the 5th signal
The sum of number of samples PP, l are the sum of peak valley point sampling points DP in the corresponding significant wave of the 5th signal；
5th computer 306, for according to the corresponding significant wave of the 5th signal the second default characteristic point sound pressure amplitude,
Calculate the second acoustic attenuation coefficient in depositWherein, APPiIt is corresponding for the 5th signal
The sound pressure amplitude of i-th second default characteristic points in significant wave；
6th computer 307, for based on sound time delay Δ t0With the second time difference Δ t2, calculate the sound of deposit in liquid
Learn velocity of sound c in characteristicp=d0/(Δt2-Δt0)；
7th computer 308, for according to the first acoustic attenuation coefficient α1With the second acoustic attenuation coefficient α2, sink in calculating liquid
Acoustic attenuation coefficient α in the acoustic characteristic of product thingp=α2-α1。
It should be noted that above-mentioned waveform processor disclosed in this utility model embodiment and each computer can be used as integrated
Circuit is arranged in the processor.
As can be seen here, in this utility model embodiment host computer by the parameter preset in memory storage measurement process,
The signal and calculation procedure of generation；By the waveform processor in processor and each computer to parameter preset, the signal for producing
Parsed and calculated acoustic measurements.The sediment acoustics in liquid be ensure that based on above-mentioned acoustic characteristic measurement apparatus
The accuracy of result when characteristic is measured.
Based on acoustic characteristic measurement apparatus disclosed in above-mentioned this utility model embodiment, below by way of specific application scenarios
Example is further illustrated：
Example one
To measure the application scenarios of the acoustic characteristic of bottom sediment, wherein, as shown in figure 4, host computer is computer
401, measurement bracket includes support 402, support block 403, connecting rod 404 and base 405, and hydrophone group is listened comprising the first pin type water
Device 4061 and the second pin type hydrophone 4062, sampling tube 407 are arranged on support 402, and acoustic transducer 408 passes through support block
403 are lain in a horizontal plane on support 402 and are connected with the end coupling of testing sample in sampling tube 407, the first pin type hydrophone
4061 and second pin type hydrophone 4062 be arranged in connecting rod 404 by mechanical tightening device, to ensure spacing distance and adopt
Insert the stability of 407 longitudinal end of sampling tube in sample end.
Specific acoustic characteristic measurement process is as follows：
What the test waves type of the basis currently input that the reception computer 401 of sonic apparatus 409 sends was generated carries test
First signal of ripple type, and be sent to according to the corresponding test waveform signal of the first signal generation for carrying test waves type
Acoustic transducer 408；
First time measurement is carried out now, the testing sample in sampling tube 407 is sea water；
Test waveform signal is converted into corresponding first sound wave and injects the sea in sampling tube 407 by acoustic transducer 608
Water；
First pin type hydrophone 4061 is gathered the second sound wave for being formed after sea water of the first sound wave and generates secondary signal
Send to sonic apparatus 609, the second pin type hydrophone 4062 gathers the 3rd sound wave that the second sound wave formed after sea water and generates
3rd signal is sent to sonic apparatus 409；
Secondary signal and the 3rd signal are amplified process by sonic apparatus 409, and are generated the 4th signal and sent to computer
401。
Second measurement is carried out now, the testing sample in sampling tube 407 is deposit；
Test waveform signal is converted into corresponding first sound wave and injects sinking in sampling tube 407 by acoustic transducer 408
Product thing；
First pin type hydrophone 4061 is gathered the falling tone ripple that formed after deposit of the first sound wave and generates the 5th letter
Number send to sonic apparatus 409, the fifth sound ripple that the collection falling tone ripple of the second pin type hydrophone 4062 is formed after deposit is simultaneously
Generate the 6th signal to send to sonic apparatus 409；
5th signal and the 6th signal are amplified process by sonic apparatus 409, and are generated the 7th signal and sent to computer
401。
401 pairs of the 4th signals of computer and the 7th signal are parsed, and calculate the acoustic characteristic of deposit in sea water.
It should be noted that the type of testing sample might not be first sea in above-mentioned first time measurement and second measurement
Water, is deposit, it is also possible to first deposit is measured afterwards, after sea water is measured.
As can be seen here, in this utility model Sample Scenario, eliminate test waves divergence loss in the seawater, it is ensured that
The accuracy of result when sediment acoustics characteristic is measured in sea water.
Example two
Based on the acoustic characteristic measurement process of above-mentioned example one, if the test waves type of host computer currently input is pulse
Ripple, now acoustic transducer for predeterminated frequency narrow frequency acoustic transducer (for example study 100kHz when bottom sediment acoustics
Characteristic, using 100kHz, frequency band is the narrow frequency transducers of ± 5kHz) when, the first hydrophone is included in hydrophone group and the second water is listened
Device, wherein, the frequency range span of the first hydrophone and the second hydrophone is 20Hz～180kHz.
Specific acoustic characteristic measurement process is as follows：
What the impulse wave type of the basis currently input that sonic apparatus reception host computer sends was generated carries impulse wave type
The first signal, and narrow frequency acoustic transducer is sent to according to the first signal generation pulse waveform signal for carrying impulse wave type
Device；
First time measurement is carried out now, the testing sample in sampling tube is liquid；
Pulse waveform signal is converted into the impulse wave of predeterminated frequency and injects the liquid of sampling tube by narrow frequency acoustic transducer
In；
First hydrophone and the second hydrophone gather the first arteries and veins that the impulse wave of predeterminated frequency is formed after liquid respectively
Rush ripple and the second impulse wave, and generate corresponding secondary signal and the 3rd signal is sent to sonic apparatus；
Secondary signal and the 3rd signal are amplified process and obtain the 4th signal and send to host computer by sonic apparatus.
Second measurement is carried out now, the testing sample in sampling tube is deposit；
Pulse waveform signal is converted into the impulse wave of predeterminated frequency and injects the deposition of sampling tube by narrow frequency acoustic transducer
In thing；
First hydrophone and the second hydrophone gather the 3rd that the impulse wave of predeterminated frequency is formed after deposit respectively
Impulse wave and the 4th impulse wave, and generate corresponding 5th signal and the 6th signal is sent to sonic apparatus；
5th signal and the 6th signal are amplified process and obtain the 7th signal and send to host computer by sonic apparatus.
Host computer is parsed to the 4th signal and the 7th signal, and calculates the acoustic characteristic of deposit in liquid.
It should be noted that the type of testing sample might not be first liquid in above-mentioned first time measurement and second measurement
Body, is deposit, it is also possible to first deposit is measured afterwards, after liquid is measured.
As can be seen here, in this utility model Sample Scenario, eliminate impulse wave divergence loss in a liquid, it is ensured that
The accuracy of result when sediment acoustics characteristic is measured in liquid, while calculate
The acoustic characteristic of thing.
Example three
Based on the acoustic characteristic measurement process of above-mentioned example one, if the test waves type of host computer currently input is sine
Ripple, now acoustic transducer is that wideband acoustic transducer (for example studies the acoustics spy of the deposit in 80kHz～160k frequency bands
Property, using 120kHz, frequency band is ± 40kHz wideband acoustic transducers) when, hydrophone group includes the first hydrophone and the second water is listened
Device, wherein, the frequency range span of the first hydrophone and the second hydrophone is 20Hz～180kHz.
Specific acoustic characteristic measurement process is as follows：
What the sine wave type of the basis currently input that sonic apparatus reception host computer sends was generated carries sine wave type
The first signal, and wideband acoustic transducer is sent to according to the first signal generation sine wave-shaped signal for carrying sine wave type
Device；
Sine wave-shaped signal is converted into sine wave and is injected in the testing sample of sampling tube by narrow frequency acoustic transducer；
First time measurement is carried out now, the testing sample in sampling tube is liquid；
First hydrophone and the second hydrophone gather the primary sinusoid and second that sine wave is formed after liquid respectively
Sine wave, and generate corresponding secondary signal and the 3rd signal is sent to sonic apparatus；
Secondary signal and the 3rd signal are amplified process and obtain the 4th signal and send to host computer by sonic apparatus.
Second measurement is carried out now, the testing sample in sampling tube is deposit；
Pulse waveform signal is converted into the impulse wave of predeterminated frequency and injects the deposition of sampling tube by narrow frequency acoustic transducer
In thing；
First hydrophone and the second hydrophone gather the 3rd sine wave and that sine wave is formed after deposit respectively
Four sine waves, and generate corresponding 5th signal and the 6th signal is sent to sonic apparatus；
5th signal and the 6th signal are amplified process and obtain the 7th signal and send to host computer by sonic apparatus.
Host computer is parsed to the 4th signal and the 7th signal, and calculates the acoustic characteristic of deposit in liquid.
It should be noted that the type of testing sample might not be first liquid in above-mentioned first time measurement and second measurement
Body, is deposit, it is also possible to first deposit is measured afterwards, after liquid is measured.
As can be seen here, in this utility model Sample Scenario, eliminate sine wave divergence loss in a liquid, it is ensured that
The accuracy of result when sediment acoustics characteristic is measured in liquid, while the frequency by adjusting wideband acoustic transducer
Rate can calculate the acoustic characteristic of deposit in liquid under different frequency.
Above a kind of acoustic characteristic measurement apparatus provided by the utility model are described in detail, it is used herein
Specific case is set forth to principle of the present utility model and embodiment, and the explanation of above example is only intended to side
Assistant solves method of the present utility model and its core concept；It is simultaneously for one of ordinary skill in the art, new according to this practicality
The thought of type, will change in specific embodiments and applications, and in sum, this specification content should not be managed
Solution is to restriction of the present utility model.
It should be noted that each embodiment in this specification is described by the way of progressive, each embodiment weight
Point explanation is all difference with other embodiment, between each embodiment identical similar part mutually referring to.
For device disclosed in embodiment, as which corresponds to the method disclosed in Example, so fairly simple, the phase of description
Part is closed referring to method part illustration.
Also, it should be noted that herein, such as first and second or the like relational terms are used merely to one
Entity or operation are made a distinction with another entity or operation, and are not necessarily required or implied between these entities or operation
There is any this actual relation or order.And, term " including ", "comprising" or its any other variant are intended to contain
Lid nonexcludability is included, so that a series of intrinsic key element of process, method, article or equipment including key elements,
Or also include the key element intrinsic for these processes, method, article or equipment.In the absence of more restrictions,
The key element limited by sentence "including a ...", it is not excluded that in the process including the key element, method, article or equipment
In also there is other identical element.
Claims (7)
1. a kind of acoustic characteristic measurement apparatus, it is characterised in that include：
The sampling tube being arranged in measurement bracket, for placing testing sample；
The sonic apparatus that first receiving terminal and the first outfan are connected with host computer, the second outfan of the sonic apparatus and acoustic transducer
The input of device is connected, and the second receiving terminal is connected with the outfan of each hydrophone in hydrophone group, sends out for receiving host computer
The first signal for carrying test waves type that the test waves type of the basis sent currently input is generated, and carried according to described
The corresponding test waveform signal of first signal generation of test waves type is sent to the acoustic transducer；
The acoustic transducer being placed horizontally in the measurement bracket, the outfan of the acoustic transducer and the sampling
The end coupling of testing sample described in pipe is connected, for the test waveform signal being converted into corresponding first sound wave and being penetrated
Enter in the testing sample in the sampling tube；
The hydrophone group is vertically arranged in the measurement bracket and the sampling end of each hydrophone is inserted in the hydrophone group
Enter the longitudinal end of the sampling tube, for the measurement process when the testing sample is liquid in, gather first sound
The second sound wave that ripple is formed after the liquid, and generate corresponding secondary signal and send to the sonic apparatus；And institute
State in measurement process when testing sample is deposit, gather the 3rd sound that first sound wave is formed after the deposit
Ripple, and generate corresponding 4th signal and send to the sonic apparatus, wherein, in the hydrophone group including at least being arranged side by side and
First hydrophone and the second hydrophone of interval predeterminable range；
The host computer being connected with the sonic apparatus, for receiving the amplifiedization secondary signal that the sonic apparatus sends
The 3rd signal for generating, and the 5th signal of amplifiedization 4th signal generation, to the 3rd signal and described the
Five signals are parsed, and calculate the acoustic characteristic of deposit described in the liquid.
2. measurement apparatus according to claim 1, it is characterised in that the hydrophone group includes：Pin type hydrophone group.
3. measurement apparatus according to claim 1, it is characterised in that the host computer includes：
For storing the predeterminable range in the hydrophone group between each hydrophone, the 3rd signal and the described 5th
The memorizer of signal；
It is connected with the memorizer, for the 3rd signal and the 5th signal are parsed and calculated in the liquid
The processor of the acoustic characteristic of the deposit.
4. measurement apparatus according to claim 3, it is characterised in that the processor is specifically included：
Waveform processor, for parsing the 3rd signal and the 5th signal, obtains corresponding acoustic waveform, judges described
The position of ski-jump in acoustic waveform, and the waveform in the default n cycle started using on the basis of ski-jump is chosen as significant wave,
The significant wave is obtained in the hits of the first default characteristic point and the sound pressure amplitude in the second default characteristic point, wherein, n's takes
Value scope is the integer more than 0, and the specially 3, described first default characteristic point includes zero point, peak point and/or peak valley point, described
Second default characteristic point is the peak point；
The first computer being connected with the waveform processor, for having based on the 3rd signal is corresponding
Sampling number of the effect ripple in the described first default characteristic point, the very first time calculated in the liquid are poorWherein, subscript j represents first hydrophone, and subscript k is represented
Second hydrophone, a are the sum of zero sample points ZP in the corresponding significant wave of the 3rd signal, and b is the described 3rd
The sum of peak point sampling number PP in the corresponding significant wave of signal, c are peak valley point in the corresponding significant wave of the 3rd signal
The sum of sampling number DP, TSTo obtain the cycle of sampling number；
The second computer being connected with first computer, for differing from Δ t according to the very first time1, calculate in the liquid
Sound time delay Δ t0=cw0/d0-Δt1, wherein, cw0For the standard velocity of sound, d0For first hydrophone and second hydrophone
Between the predeterminable range；
The 3rd computer being connected with the waveform processor, for according to the corresponding significant wave of the 3rd signal described
The sound pressure amplitude of two default characteristic points, calculates the first acoustic attenuation coefficient in the liquid
Wherein, APPiThe sound pressure amplitude of the second default characteristic point described in i-th in the corresponding significant wave of the 3rd signal；
The 4th computer being connected with the waveform processor, for based on the 5th signal correspondence
Significant wave in the sampling number of the described first default characteristic point, calculate the second time difference in the depositWherein, during m is the corresponding significant wave of the 5th signal
Zero sample is counted the sum of ZP, and n is the sum of peak point sampling number PP in the corresponding significant wave of the 5th signal, and l is
In the corresponding significant wave of 5th signal, peak valley point sampling is counted the sum of DP；
The 5th computer being connected with the waveform processor, for according to the corresponding significant wave of the 5th signal described
The sound pressure amplitude of two default characteristic points, calculates the second acoustic attenuation coefficient in the deposit
Wherein, APPiThe sound pressure amplitude of the second default characteristic point described in i-th in the corresponding significant wave of the 5th signal；
The 6th computer being connected with second computer and the 4th computer, for based on the sound time delay Δ t0With
The second time difference Δ t2, calculate velocity of sound c in the acoustic characteristic of deposit described in the liquidp=d0/(Δt2-Δ
t0)；
The 7th computer being connected with the 3rd computer and the 5th computer, for according to the first acoustic attenuation system
Number α1With the second acoustic attenuation coefficient α2, calculate the acoustic attenuation coefficient α in the acoustic characteristic of deposit described in the liquidp
=α2-α1。
5. measurement apparatus according to claim 1, it is characterised in that the acoustic transducer includes：Predeterminated frequency it is narrow
Frequency acoustic transducer or wideband acoustic transducer.
6. measurement apparatus according to claim 1, it is characterised in that the measurement bracket includes：Base, be arranged at it is described
Support block and support and the connecting rod being arranged on the support on base.
7. measurement apparatus according to claim 1, it is characterised in that the host computer includes：Computer, notebook or flat
Plate.
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| CN201620696610.4U CN206057253U (en) | 2016-07-01 | 2016-07-01 | A kind of acoustic characteristic measurement apparatus |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018550A (en) * | 2016-07-01 | 2016-10-12 | 广东工业大学 | Measurement device and method for acoustic characteristics |
| CN107218518A (en) * | 2017-04-17 | 2017-09-29 | 昆明理工大学 | A kind of detection method of detection means for drain line blockage failure |
| CN108414625A (en) * | 2018-05-30 | 2018-08-17 | 广东工业大学 | A kind of acoustic characteristic measuring device and system |
-
2016
- 2016-07-01 CN CN201620696610.4U patent/CN206057253U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106018550A (en) * | 2016-07-01 | 2016-10-12 | 广东工业大学 | Measurement device and method for acoustic characteristics |
| CN106018550B (en) * | 2016-07-01 | 2019-01-22 | 广东工业大学 | A kind of acoustic characteristic measuring device and method |
| CN107218518A (en) * | 2017-04-17 | 2017-09-29 | 昆明理工大学 | A kind of detection method of detection means for drain line blockage failure |
| CN107218518B (en) * | 2017-04-17 | 2019-02-19 | 昆明理工大学 | A kind of detection method of the detection device for drain line blockage failure |
| CN108414625A (en) * | 2018-05-30 | 2018-08-17 | 广东工业大学 | A kind of acoustic characteristic measuring device and system |
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