CN208520817U - Deposit rate of sound and attenuation of sound measuring device - Google Patents
Deposit rate of sound and attenuation of sound measuring device Download PDFInfo
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- CN208520817U CN208520817U CN201821203110.8U CN201821203110U CN208520817U CN 208520817 U CN208520817 U CN 208520817U CN 201821203110 U CN201821203110 U CN 201821203110U CN 208520817 U CN208520817 U CN 208520817U
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Abstract
The utility model provides deposit rate of sound and attenuation of sound measuring device, setting has length difference deposit case on length direction and width direction, and one group of sound wave transmitting and receiving device is installed respectively on length direction and width direction, it avoids and cuts the disturbance of sample brought by one section of sample in traditional measurement acoustic attenuation method, improve measurement accuracy and efficiency；Energy converter is fitted closely by pressing device and deposit case, can exclude the air between energy converter and sediment box to the maximum extent, is further excluded air and is interfered measurement result bring；Design has filter hole on the bottom plate of deposit case, geotextiles are laid on bottom plate, when vacuum pump vacuumizes, deposit is under sealing film top atmospheric pressure and Gravitative Loads, pore water and bubble therein can be constantly discharged by geotextiles and filter hole, so that deposit be made uniformly to be saturated consolidation.The utility model overcomes the defect of conventional method, further ensures the accuracy of measurement result.
Description
Technical field
The utility model relates to medium acoustic characteristic field of measuring technique, more specifically, be related to the deposit velocity of sound and
Acoustical attenuation measurement device.
Background technique
Seabed sediment acoustics parameter, such as speed and decaying that sound wave is propagated in deposit are that deposit sound wave passes
Theoretical basic input parameters are broadcast, the acoustic model based on theory is also required to these parameters.It is accurate to obtain bottom sediment
Middle rate of sound and attenuation of sound has highly important scientific meaning to the research of marine environment sound field.
Seabed sediment acoustics parameter measurement techniques mainly divide three kinds, i.e., reflection/refractive profile telemetering, in situ measurement and take
Sample laboratory measurement.Reflection/refractive profile telemetry provides the bulk sound velocity on large volume stratum and estimating for attenuation coefficient
Meter belongs to the indirect method for obtaining seabed sediment acoustics property, and sampling and measuring and in situ measurement belong to direct method.Saturation
The relationship between acoustical damping properties and its physical property in deposit is for determining that acoustic attenuation reason and selection are suitable theoretical
It is extremely important for computation model.However, the sound of the bottom sediment obtained by situ measurement or sampling laboratory measurement declines
Subtract the decaying comprising diversified forms, both include natural attenuation, also includes sound wave in deposition interface and other deposit heterogeneous bodies
The conversion and the scattering of sound wave at place etc., therefore, the bottom sediment sound obtained based in situ measurement and sampling laboratory measurement
Correlativity between attenuation characteristic and physical property is often poor.
The measurement experiment for carrying out rate of sound and attenuation of sound in deposit under laboratory environment condition has many advantages.It is first
First, the extraneous factor of deposit is controllable, can also take measures to prepare the sediment sample that is uniformly saturated to exclude deposit point
Layer, inclusion, bubble etc. are influenced caused by experimental result, thus laboratory measurement is more advantageous to the test to sediment properties
And verifying.
Carrying out the measurement experiment of rate of sound and attenuation of sound in deposit under laboratory environment condition at present mainly includes sonde method
And patterning method, still, both methods still has the defect that can not be overcome in implementation process:
1. probe-type deposit rate of sound and attenuation of sound measuring device is intrusive, the probe insertion equipped with acoustic transducer
When carrying out the measurement of its rate of sound and attenuation of sound in deposit, more or less deposit can be caused to disturb, in comparison, intend application
Deposit rate of sound and attenuation of sound measuring device be lossless for deposit；
2. patterning method is tested to obtain the rate of sound and attenuation of sound of deposit for column shaped deposit sample: the measurement velocity of sound
Usual way is the transmitting transducer in columnar samples one end installation connection signal generator, and the other end installs connection signal and receives dress
The reception energy converter set, the velocity of sound measured in this way are really the bulk sound velocity on column shaped deposit sample length direction；Measurement sound
Decaying also needs to cut out one section of sample, and the acoustic attenuation of deposit is obtained using coaxial gap attenuation measurement method, cuts out one section of sample
Product will certainly cause to disturb to deposit, and the especially sediment disturbance of convection current modeling and soft modeling is especially prominent.
Utility model content
It carries out lacking present in the measurement experiment of rate of sound and attenuation of sound in deposit under laboratory environment condition to overcome
Limit, sonde method and patterning method bring perturbed problem, the utility model proposes deposit rate of sound and attenuation of sound measuring devices, overcome
Sonde method and the disturbance of patterning method bring keep measurement result more acurrate reliable.
To achieve the above object, the utility model provides the following technical solutions:
Deposit rate of sound and attenuation of sound measuring device comprising deposit case 5, sound wave transmitting and receiving device, energy converter
Group,
It is additionally provided with vacuum pump 1, the vacuum pump 1 passes through piping connection to deposit case 5, for extracting deposit case 5
Water contained by interior deposit, gas；
The deposit case 5 has the range difference on length direction and width direction；
It is provided with first transducer group 7 and its transmitting of corresponding sound wave on 5 length direction of deposit case and receives
Device；Second transducer group 8 and its corresponding sound wave transmitting and receiving device are equipped in 5 width direction of deposit case.
Further, several filter hole 16 are set on the bottom plate of the deposit case 5, diafiltration is set below the filter hole 16
Geotextiles 4 are arranged between 5 bottom plate of the infiltration tanks 3 and deposit case for case 3.
Further, surge tank 2 is additionally provided between the vacuum pump 1 and deposit case 5, the surge tank 2 passes through pipeline
It is connected with infiltration tanks 3, for temporary water, the gas extracted from deposit case 5.
Further, it is covered at 5 top plate of deposit case by sealing film 6.
Further, the first transducer group 7, second transducer group 8 are fixedly connected on deposit by pressing device
5 outer wall of case；The pressing device includes holddown spring 9, compresses piece 10, positioning tube 11；It is heavy that the positioning tube 11 is fixed on
On the tank wall of product object case 5, energy converter is mounted in positioning tube 11, and the holddown spring 9 and compression piece 10 are set to positioning tube 11
Positioning tube 11 and energy converter are pressed on the tank wall of deposit case 5 by rear side.
Further, energy converter is mounted in positioning tube 11 by spacer 13.
Further, sealing ring 12 is installed on spacer 13, the space formed with closed transducer, spacer 13, positioning tube 11.
Further, 11 upper design of positioning tube has water injection hole 14 and gas vent 15；When measurement, from water injection hole 14 to this
Air free water is injected in sealing space, air therein is discharged by gas vent 15.
The beneficial effects of the utility model are:
First: the deposit case of the deposit rate of sound and attenuation of sound measuring device of the utility model have length direction with
Length difference in width direction, and one group of sound wave transmitting and receiving device is installed respectively on length direction and width direction, it passes
Required distance difference in unified test amount acoustic attenuation method is replaced by the length difference of length direction and width, is avoided traditional measurement sound and is declined
Subtract and cut the disturbance of sample brought by one section of sample in method, improves measurement accuracy and efficiency；
Second: energy converter is fitted closely by pressing device and deposit case, and specially positioning tube is fixed on deposit case
Tank wall on, upper design has water injection hole and gas vent.Energy converter is mounted in positioning tube by spacer, is equipped on spacer close
Seal, the space formed with closed transducer, spacer, positioning tube.When measurement, injected from water injection hole into this sealing space without gas
Water, air therein are discharged by gas vent, and in holddown spring and under compressing the pressure effect of piece, energy converter is pressed in deposit
On the tank wall of case；By the setting of above-mentioned pressing device, the air between energy converter and sediment box can be excluded to the maximum extent,
Air is further excluded to interfere measurement result bring.
Third: design has filter hole on the bottom plate of the deposit case of the utility model, and geotextiles, deposit are laid on bottom plate
Space more than geotextiles, covering sealing film on deposit.When vacuum pump vacuumizes, deposit is in sealing film top atmospheric pressure
Under Gravitative Loads, pore water and bubble therein can be constantly discharged by geotextiles and filter hole, to keep deposit equal
Even saturation consolidation, further ensures the accuracy of measurement result.
Detailed description of the invention
Attached drawing 1 is the main view of the utility model deposit rate of sound and attenuation of sound measuring device；
Attached drawing 2 is the deposit case of the utility model and the top view of energy converter；
Attached drawing 3 is the energy converter and pressing device structural schematic diagram of the utility model；
Attached drawing 4 is the left view of the positioning tube of the utility model；
Attached drawing 5 is the top view of the deposit bottom plate of the utility model.
Drawing reference numeral:
Vacuum pump 1；Surge tank 2；Infiltration tanks 3；Geotextiles 4；Deposit case 5；Seal film 6；First transducer group 7；Second
Energy converter group 8；Holddown spring 9；Compress piece 10；Positioning tube 11；Sealing ring 12；Spacer 13；Water injection hole 14；Gas vent 15；Filtering
Hole 16.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution of the utility model, below with reference to the utility model
Attached drawing carries out clear, complete description to the technical solution of the utility model, and based on the embodiment in the application, this field is general
Logical technical staff other similar embodiments obtained without making creative work, all should belong to the application
The range of protection.
The deposit rate of sound and attenuation of sound measuring device of the utility model comprising deposit case 5, sound wave transmitting and reception
Device, energy converter group are additionally provided with vacuum pump 1, and the vacuum pump 1 is by piping connection to deposit case 5, for extracting deposition
Water contained by deposit in object case 5, gas；The deposit case 5 has the range difference on length direction and width direction；?
First transducer group 7 and its corresponding sound wave transmitting and receiving device are provided on 5 length direction of deposit case；It is depositing
5 width direction of object case is equipped with second transducer group 8 and its corresponding sound wave transmitting and receiving device.At this point, two groups of energy converters
The deposit length of measurement differs, and the acoustic characteristic of deposit can be analyzed based on range difference.
In one preferred scheme, several filter hole 16, the deposit case 5 are set on the bottom plate of the deposit case 5
It is covered at top plate by sealing film 6.Infiltration tanks 3 are set below the filter hole 16, the infiltration tanks 3 and 5 bottom plate of deposit case it
Between be arranged geotextiles 4.
Surge tank 2 is additionally provided between the vacuum pump 1 and deposit case 5, the surge tank 2 passes through pipeline and infiltration tanks
3 are connected, for temporary water, the gas extracted from deposit case 5.When vacuum pump 1 vacuumizes, deposit is in sealing 6 top atmosphere of film
Under pressure and Gravitative Loads, pore water and bubble therein can be constantly discharged by geotextiles 4 and filter hole 16, in surge tank 2
In keep in, so that deposit be made uniformly to be saturated consolidation.
In order to exclude the air of energy converter group Yu deposit tank wall, the accuracy of measurement result, first transducing are improved
Device group 7, second transducer group 8 are fixedly connected on 5 outer wall of deposit case by pressing device；The pressing device includes pressure
Tight spring 9 compresses piece 10, positioning tube 11；The positioning tube 11 is fixed on the tank wall of deposit case 5, and energy converter is mounted on
In positioning tube 11, the holddown spring 9 and compression piece 10 are set to 11 rear side of positioning tube, and positioning tube 11 and energy converter are pressed on
On the tank wall of deposit case 5.Energy converter is mounted in positioning tube 11 by spacer 13.Sealing ring 12 is installed on spacer 13, with
The space that closed transducer, spacer 13, positioning tube 11 are formed.11 upper design of positioning tube has water injection hole 14 and gas vent
15；When measurement, air free water is injected into this sealing space from water injection hole 14, air therein is discharged by gas vent 15.When measurement,
Air free water is injected into this sealing space from water injection hole 14, air therein is discharged by gas vent 15, in holddown spring 9 and is compressed
Under the pressure effect of piece 10, energy converter is pressed on the tank wall of deposit case 5, further excludes air interference.
The process of the specific measurement deposit rate of sound and attenuation of sound of the utility model is as follows:
S1: 5 bottom portion of deposit case spreads geotextiles 4, and 4 laying of geotextiles is smooth, slow to deposit case 5 without fold
Slowly air free water is filled；
S2: putting on spacer 13 for the energy converter of first transducer group 7, sealing ring 12 loaded on spacer, and is integrally put into and determines
In the cylinder 11 of position, piece 10 will be compressed and be pressed onto energy converter rear end, energy converter front end is made to be tightly attached to the two sides case of 5 length direction of deposit case
On wall, air free water then is injected to water injection hole 14, until water is discharged from gas vent 15；And first transducer group 7 is connected respectively
It is connected to sound wave transmitting and receiving device；
S3: second transducer group 8 is fixedly connected on to the two sides case of 5 width direction of deposit case according to the same method of S2
On wall, and second transducer group 8 is respectively connected to sound wave transmitting and receiving device；
S4: starting acoustic signal generator and reception device, according to the acoustic signals that deposit case length and width direction receives,
Calculate the geometrical attenuation loss α of energy converterw；
Wherein A1wIt is its length L when containing air free water in deposit case1The signal that energy converter receives is received on direction
Voltage amplitude peak value, A2wIt is its width L2The voltage amplitude peak value for the signal that energy converter receives is received on direction.
S5: uniform, fluidised form deposit is slowly filled deposit case by the water in discharge deposit case 5；
S6: interface on deposit is struck off, and starting vacuum pump vacuumizes, and object settlement stability to be deposited closes vacuum pump；
S7: being again started up acoustic signal generator and reception device, believes according to the sound wave that deposit case length and width direction receives
Number, calculate the rate of sound and attenuation of sound of deposit；It is specific as follows:
According to deposit velocity of sound VpCalculation formula calculates velocity of sound Vp:
Vp=Δ L/ Δ t
Wherein Δ L is the difference of deposit case length and width, and Δ t is when containing deposit in deposit case on its length and width direction
Receive the difference then for the acoustic signals that energy converter receives；
According to deposit acoustic attenuation αpCalculation formula calculates acoustic attenuation αp:
Wherein A1It is its length L when containing deposit in deposit case1The signal that energy converter receives is received on direction
Voltage amplitude peak value, A2It is its width L2The voltage amplitude peak value for the signal that energy converter receives is received on direction.
The utility model is described in detail above, the above, the only better embodiment of the utility model
, it is when the utility model practical range cannot be limited, i.e., all according to the made equivalent changes and modifications of the application range, it should still belong to
In the utility model covering scope.
Claims (8)
1. deposit rate of sound and attenuation of sound measuring device comprising deposit case (5), sound wave transmitting and receiving device, energy converter
Group, it is characterised in that: be additionally provided with vacuum pump (1), the vacuum pump (1) passes through piping connection to deposit case (5), for taking out
Take water, gas contained by the deposit in deposit case (5)；
The deposit case (5) has the range difference on length direction and width direction；
It is provided with first transducer group (7) and its transmitting of corresponding sound wave on deposit case (5) length direction and receives
Device；Second transducer group (8) and its corresponding sound wave transmitting and receiving device are equipped in deposit case (5) width direction.
2. deposit rate of sound and attenuation of sound measuring device according to claim 1, it is characterised in that: the deposit case
(5) be arranged on bottom plate several filter hole (16), infiltration tanks (3) be set below the filter hole (16), the infiltration tanks (3) with
Geotextiles (4) are set between deposit case (5) bottom plate.
3. deposit rate of sound and attenuation of sound measuring device according to claim 2, it is characterised in that: the vacuum pump (1)
It is additionally provided between deposit case (5) surge tank (2), the surge tank (2) is connected by pipeline with infiltration tanks (3), is used for
Temporary water, the gas extracted from deposit case (5).
4. deposit rate of sound and attenuation of sound measuring device according to claim 1, it is characterised in that: the deposit case
(5) it is covered at top plate by sealing film (6).
5. deposit rate of sound and attenuation of sound measuring device according to claim 1, it is characterised in that: the first transducer
Group (7), second transducer group (8) are fixedly connected on deposit case (5) outer wall by pressing device；The pressing device packet
It includes holddown spring (9), compress piece (10), positioning tube (11)；The positioning tube (11) is fixed on the tank wall of deposit case (5)
On, energy converter is mounted in positioning tube (11), and the holddown spring (9) and compression piece (10) are set on rear side of positioning tube (11),
Positioning tube (11) and energy converter are pressed on the tank wall of deposit case (5).
6. deposit rate of sound and attenuation of sound measuring device according to claim 5, it is characterised in that: energy converter passes through spacer
(13) it is mounted in positioning tube (11).
7. deposit rate of sound and attenuation of sound measuring device according to claim 6, it is characterised in that: spacer is installed on (13)
There are sealing ring (12), the space formed with closed transducer, spacer (13), positioning tube (11).
8. deposit rate of sound and attenuation of sound measuring device according to claim 5, it is characterised in that: the positioning tube (11)
Upper design has water injection hole (14) and gas vent (15)；When measurement, air free water is injected into this sealing space from water injection hole (14),
Air therein is discharged by gas vent (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821203110.8U CN208520817U (en) | 2018-07-27 | 2018-07-27 | Deposit rate of sound and attenuation of sound measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821203110.8U CN208520817U (en) | 2018-07-27 | 2018-07-27 | Deposit rate of sound and attenuation of sound measuring device |
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| CN208520817U true CN208520817U (en) | 2019-02-19 |
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| CN201821203110.8U Active CN208520817U (en) | 2018-07-27 | 2018-07-27 | Deposit rate of sound and attenuation of sound measuring device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956781A (en) * | 2018-07-27 | 2018-12-07 | 国家海洋局第海洋研究所 | Deposit rate of sound and attenuation of sound measuring device and method |
| CN113866269A (en) * | 2021-09-16 | 2021-12-31 | 中国科学院南海海洋研究所 | Vertical cross section layered acoustic measurement system and method |
| CN116738182A (en) * | 2023-07-03 | 2023-09-12 | 中山大学 | Method, device and storage medium for predicting sound attenuation range value of submarine sediment |
-
2018
- 2018-07-27 CN CN201821203110.8U patent/CN208520817U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956781A (en) * | 2018-07-27 | 2018-12-07 | 国家海洋局第海洋研究所 | Deposit rate of sound and attenuation of sound measuring device and method |
| CN113866269A (en) * | 2021-09-16 | 2021-12-31 | 中国科学院南海海洋研究所 | Vertical cross section layered acoustic measurement system and method |
| CN116738182A (en) * | 2023-07-03 | 2023-09-12 | 中山大学 | Method, device and storage medium for predicting sound attenuation range value of submarine sediment |
| CN116738182B (en) * | 2023-07-03 | 2024-02-27 | 中山大学 | Method, device and storage medium for predicting sound attenuation range value of submarine sediment |
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