CN104614446A - Acoustic velocity measurement method based on marine bottom sediment - Google Patents
Acoustic velocity measurement method based on marine bottom sediment Download PDFInfo
- Publication number
- CN104614446A CN104614446A CN201510026451.7A CN201510026451A CN104614446A CN 104614446 A CN104614446 A CN 104614446A CN 201510026451 A CN201510026451 A CN 201510026451A CN 104614446 A CN104614446 A CN 104614446A
- Authority
- CN
- China
- Prior art keywords
- transducer
- pulse
- transmitting transducer
- sediment
- marine bottom
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000013049 sediment Substances 0.000 title claims abstract description 37
- 238000000691 measurement method Methods 0.000 title claims abstract description 10
- 238000012545 processing Methods 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 12
- 238000003708 edge detection Methods 0.000 claims description 4
- 230000001934 delay Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000005259 measurement Methods 0.000 description 22
- 239000000523 sample Substances 0.000 description 20
- 238000001914 filtration Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention relates to an acoustic velocity measurement method based on marine bottom sediment. The method is mainly technically characterized in that a sediment sample tube is placed on a transmitting transducer support, a precision ball screw drives a linear slider to perpendicularly move through a crank handle, so that a receiving transducer is contacted with the top of the sediment sample tube, and a signal processing module calculates the actual distance between a transmitting transducer and the receiving transducer according to a count value measured by a distance measuring sensor; the signal processing module calculates a waveform time delay truth value of the receiving transducer and the transmitting transducer with a time delay measuring method of double-frequency CW (clockwise) pulse; and an acoustic velocity of the marine bottom sediment is calculated through a relation that the acoustic velocity is equal to a quotient obtained by dividing the distance by the time. According to the acoustic velocity measurement method based on marine bottom sediment, the sediment sample tube is placed between the receiving transducer and the transmitting transducer, the distance between the receiving transducer and the transmitting transducer is measured by the distance measuring sensor, the acoustic velocity of the marine bottom sediment is measured with the signal time delay measuring method of double-frequency CW pulse, higher time delay measuring accuracy is achieved, and an automatic detection function is realized.
Description
Technical field
The invention belongs to acoustic velocity measutement technical field, especially a kind of sonic velocity measurement method based on marine bottom sediment.
Background technology
At present, mainly contain following two kinds of measurement mechanisms for marine bottom sediment acoustic velocity measutement: one utilizes WSD-3 numeral sonic apparatus to construct acoustic velocity measurement device in National Bureau of Oceanography one place seabed sediment acoustics characteristic research, another kind a kind of marine bottom sediment acoustic velocity measurement device based on sound wave probe that has been Guangdong University of Technology's Electrical and Mechanical Engineering College and Chinese Academy of Sciences's South Sea institute of oceanography joint development.Below above-mentioned two kinds of acoustic velocity measurement devices are described respectively:
With WSD-3 numeral sonic apparatus build acoustic velocity measurement device, employing be pulse front edge detect delay time estimation method.Its transmitting transducer frequency is respectively 25kHz, 50kHz, 100kHz, 150kHz, 200kHz, 250kHz six kinds, and the length vernier caliper measurement of acoustic characteristic test specimen in use, precision is 0.1mm.Gravity corer obtain sample diameter 104mm, length between 500 ~ 3000mm, average length 1093mm.The advantage of this measurement mechanism is: sample length is large, and low to length-measuring appliance accuracy requirement, structure is simple; The shortcoming of this measurement mechanism is: transducer is little, and frequency of operation is low, and sample length is excessive, and measurement result is the synthesis result of each surface sediments velocity of sound, and impact is measured.
Based on the transmitting transducer frequency 40kHz that the marine bottom sediment acoustic velocity measurement device of sound wave probe adopts, sample length 300mm.The shortcoming of this measurement mechanism is: the sensitivity of sound wave probe is low, has extra disturbance to sample; Frequency is low, and in medium, sound field is complicated.
In sum, mainly there is following problem in existing marine bottom sediment acoustic velocity measurement device: (1) have employed planar transmit transducer, but do not consider frequency of sound wave, launch relation between beamwidth and sample size; Launch beamwidth generally excessive relative to sample size, sound wave forms reflection at sample boundaries, causes receiving waveform disorderly and unsystematic.(2) time delay is estimated to adopt the method detecting Mintrop wave time of arrival, and on the one hand, by the impact of system bandwidth, phase shift, Mintrop wave is easily missed, thus causes the error of latency measurement; On the other hand, the detection of Mintrop wave mainly relies on the observation of people, is difficult to realize automatic detection.(3) because the manufacturing process of current domestic special-shaped transducer is not still very ripe, the price of special-shaped transducer and performance still cannot meet practical demand.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of reasonable in design, sonic velocity measurement method based on marine bottom sediment that measuring accuracy is high and easy to use is provided.
The present invention solves its technical matters and takes following technical scheme to realize:
Based on a sonic velocity measurement method for marine bottom sediment, comprise the following steps:
Step 1, sediment sample pipe is placed on transmitting transducer support, precision ball screw leading linear slide block is made to do vertical movement by wind, make receiving transducer and sediment sample pipe top contact, signal processing module calculates the actual range between transmitting transducer and receiving transducer according to the count value that distance measuring sensor records;
Step 2, signal processing module calculate the waveform time delay true value of receiving transducer and transmitting transducer by the time-delay measuring method of double frequency CW pulse;
Step 3, by the velocity of sound=distance/time relationship, calculate the velocity of sound of marine bottom sediment.
And the concrete grammar of described step 2 is: double frequency CW pulse signal launched by transmitting transducer, and this double frequency CW pulse is by former and later two different frequencies f
1and f
2cW1 pulse and CW2 pulse composition, wherein: f
1=(N+a) f, f
2choosing of=Nf, f should ensure that phase place is not fuzzy, and N+a and N is mutual prime rwmber, CW1 pulse length τ
0be known, CW2 delays τ than CW1
0, τ is the time delay true value that signal is transmitted into reception; This time delay true value τ is:
Wherein, τ
d,
for time and the phase place in the forward position of CW1,
for the phase place in CW2 forward position moment, k
1, k
2=0,1,2 ..., k
1, k
2value determined by the quality of leading edge detection.
Advantage of the present invention and good effect are:
1, sediment sample pipe vertically arranges between receiving transducer and transmitting transducer by the present invention, the accurate distance between transmitting transducer and receiving transducer is measured by distance measuring sensor, and adopt double frequency CW pulse signal time-delay measuring method to realize the velocity of sound function of marine bottom sediment, there is higher latency measurement precision, and realize automatic detection function.
2, the present invention adopts the transmitting transducer of narrow beam, adopts lower frequency of operation, reduces Absorption of Medium loss, ensures received signal quality, reduces dielectric stratifying to the impact of acoustic velocity measutement.
Accompanying drawing explanation
Fig. 1 is the acoustic velocity measutement system connection diagram based on marine bottom sediment;
Fig. 2 is the circuit block diagram of measurement instrument;
Fig. 3 is that pulse of the present invention is to structural representation;
In Fig. 1,1-wind, 2-precision ball screw, 3-linear slide block, 4-receiving transducer support, 5-receiving transducer, 6-sediment sample pipe, 7-transmitting transducer support, 8-draining tap, 9-transmitting transducer, 10-base, 11-vertical support frame, 12-distance measuring sensor, 13-measurement instrument.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is further described:
A kind of sonic velocity measurement method based on marine bottom sediment, be realize in acoustic velocity measutement system as shown in Figure 1, this system comprises base 10, vertical support frame 11, wind 1, precision ball screw 2, linear slide block 3, receiving transducer support 4, receiving transducer 5, transmitting transducer support 7, transmitting transducer 9, distance measuring sensor 12 and measurement instrument 13.Described vertical support frame and transmitting transducer support installing are on base, described transmitting transducer is arranged on transmitting transducer support, described precision ball screw is arranged on vertical support frame, described wind is arranged on the top of precision ball screw, this wind is connected with distance measuring sensor and drives distance measuring sensor to rotate around precision ball screw, described linear slide block can slide up and down and be arranged on precision ball screw, described receiving transducer support level is arranged on the outside of linear slide block, described receiving transducer is arranged on the bottom of receiving transducer support, sediment sample pipe 6 is installed between receiving transducer and transmitting transducer, the bottom of this sediment sample pipe is inlaid in transmitting transducer support, the bottom sidewall of transmitting transducer support is provided with a draining tap 8, water swivel be used for discharge sample hose flow out water.Described measurement instrument is connected with receiving transducer, transmitting transducer and distance measuring sensor respectively.
As shown in Figure 2, described measurement instrument comprises signal processing module, D/A module, light-coupled isolation module, power amplifier module, amplification filtering module, A/D module, this signal processing module is connected with transmitting transducer by D/A module, light-coupled isolation module, power amplifier module, this signal processing module is connected with receiving transducer by A/D module, amplification filtering module, and this signal processing module is also connected with distance measuring sensor and digital display device.This measurement instrument take signal processing module as core, and default digital signal pulses is sent to D/A module by signal processing module, controls A/D module simultaneously and starts collection signal; D/A module converts digital signal to simulating signal, passes to power amplifier module through light-coupled isolation module, and the signal promotion transmitting parallel operation that weak voltage signal is enlarged into high voltage and high current by power amplifier module sends acoustical signal pulse; Acoustical signal pulses switch is that ultra-weak electronic signal carries out amplifying and filtering out-of-band noise through amplification filtering module by receiving transducer, after be converted to by A/D module the accurate distance that digital signal obtains between transmitting transducer and receiving transducer.Signal processing module is after measuring distance, then the time-delay measuring method of double frequency CW pulse calculates the time delay value (mistiming of transmitting-receiving waveform) being transmitted into reception, finally by the velocity of sound, the relation of Distance geometry time, calculates the sediment velocity of sound.
The present invention realizes in above-mentioned measuring system, specifically comprises the following steps:
Step 1, sediment sample pipe is placed on transmitting transducer support, precision ball screw leading linear slide block is made to do vertical movement by wind, make receiving transducer and sediment sample pipe top contact, signal processing module calculates the actual range between transmitting transducer and receiving transducer according to the count value that distance measuring sensor records.
In this step, the count value that distance measuring sensor records by signal processing module is multiplied by the actual range that setting multiplying power can obtain between transmitting transducer and receiving transducer.
Step 2, signal processing module calculate the waveform time delay true value of receiving transducer and transmitting transducer by the time-delay measuring method of double frequency CW pulse.
Signal processing module in measurement instrument adopts the time-delay measuring method of double frequency CW pulse to carry out the calculating of the velocity of sound, and it is fuzzy that this time-delay measuring method can eliminate the cycle that leading edge detection brings, and reaches quite high latency measurement precision simultaneously.Concrete grammar is as follows:
Double frequency CW pulse signal launched by transmitting transducer, and double frequency CW pulse is by former and later two different frequencies f
1and f
2cW pulse composition, as shown in Figure 3.Wherein f
1=(N+a) f, f
2choosing of=Nf, f should ensure that phase place is not fuzzy, and N+a and N is mutual prime rwmber.CW1 pulse length τ
0be known, CW2 delays τ than CW1
0, τ is the time delay true value that signal is transmitted into reception.
After detecting the forward position of CW1, time delay τ
0as the forward position of CW2, τ
d,
for time and the phase place in the forward position of CW1,
for the phase place in CW2 forward position moment.Then:
Wherein k
1, k
2=0,1,2 ..., traversal k
1, k
2make:
Set up within the scope of estimated accuracy.K
1, k
2value determined by the quality of leading edge detection, generally can not be very large.So:
Step 3, by the velocity of sound=distance/time relationship, calculate the velocity of sound of marine bottom sediment.
It is emphasized that; embodiment of the present invention is illustrative; instead of it is determinate; therefore the present invention includes the embodiment be not limited to described in embodiment; every other embodiments drawn by those skilled in the art's technical scheme according to the present invention, belong to the scope of protection of the invention equally.
Claims (2)
1., based on a sonic velocity measurement method for marine bottom sediment, it is characterized in that comprising the following steps:
Step 1, sediment sample pipe is placed on transmitting transducer support, precision ball screw leading linear slide block is made to do vertical movement by wind, make receiving transducer and sediment sample pipe top contact, signal processing module calculates the actual range between transmitting transducer and receiving transducer according to the count value that distance measuring sensor records;
Step 2, signal processing module calculate the waveform time delay true value of receiving transducer and transmitting transducer by the time-delay measuring method of double frequency CW pulse;
Step 3, by the velocity of sound=distance/time relationship, calculate the velocity of sound of marine bottom sediment.
2. the sonic velocity measurement method based on marine bottom sediment according to claim 1, is characterized in that: the concrete grammar of described step 2 is: double frequency CW pulse signal launched by transmitting transducer, and this double frequency CW pulse is by former and later two different frequencies f
1and f
2cW1 pulse and CW2 pulse composition, wherein: f
1=(N+a) f, f
2choosing of=Nf, f should ensure that phase place is not fuzzy, and N+a and N is mutual prime rwmber, CW1 pulse length τ
0be known, CW2 delays τ than CW1
0, τ is the time delay true value that signal is transmitted into reception; This time delay true value τ is:
Wherein, τ
d,
for time and the phase place in the forward position of CW1,
for the phase place in CW2 forward position moment, k
1, k
2=0,1,2 ..., k
1, k
2value determined by the quality of leading edge detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510026451.7A CN104614446B (en) | 2015-01-20 | 2015-01-20 | Acoustic velocity measurement method based on marine bottom sediment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510026451.7A CN104614446B (en) | 2015-01-20 | 2015-01-20 | Acoustic velocity measurement method based on marine bottom sediment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104614446A true CN104614446A (en) | 2015-05-13 |
| CN104614446B CN104614446B (en) | 2017-05-10 |
Family
ID=53148988
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510026451.7A Expired - Fee Related CN104614446B (en) | 2015-01-20 | 2015-01-20 | Acoustic velocity measurement method based on marine bottom sediment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104614446B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760888A (en) * | 2018-07-27 | 2018-11-06 | 国家海洋局第海洋研究所 | Seabed sediment acoustics profile survey device and method |
| CN109696235A (en) * | 2018-12-27 | 2019-04-30 | 国家深海基地管理中心 | A kind of deep-sea effective sound velocity determines method |
| CN110954907A (en) * | 2019-11-26 | 2020-04-03 | 中国科学院深海科学与工程研究所 | A high-precision sediment acoustic detection device applied to deep-sea shallow surface |
| CN111561990A (en) * | 2020-04-30 | 2020-08-21 | 中国极地研究中心 | An observation device suitable for the acquisition of surface sound velocity in polar ice regions |
| CN113091877A (en) * | 2021-04-07 | 2021-07-09 | 上海海洋大学 | Device and method for measuring target strength of pressure-controlled underwater acoustic scatterer |
| CN113866275A (en) * | 2021-10-29 | 2021-12-31 | 广东工业大学 | Automatic acoustic layered measurement system and measurement method |
| CN115839998A (en) * | 2023-01-06 | 2023-03-24 | 自然资源部第一海洋研究所 | System and device for testing sound velocity of submarine sediment sample based on broadband transducer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5166910A (en) * | 1991-10-15 | 1992-11-24 | Atlantic Richfield Company | Method and apparatus for measuring the acoustic velocity |
| US20080148852A1 (en) * | 2006-12-20 | 2008-06-26 | Maki Voldi E | Acoustic transducer system for nondestructive testing of cement |
| KR101368196B1 (en) * | 2013-12-02 | 2014-02-28 | 한국지질자원연구원 | Apparatus for measuring wave transmission velocity and method for measuring wave transmission velocity using thereof |
| CN104237389A (en) * | 2014-09-24 | 2014-12-24 | 国家海洋局第二海洋研究所 | Small-scale sedimentary columnar sample sound velocity measuring and sampling platform |
-
2015
- 2015-01-20 CN CN201510026451.7A patent/CN104614446B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5166910A (en) * | 1991-10-15 | 1992-11-24 | Atlantic Richfield Company | Method and apparatus for measuring the acoustic velocity |
| US20080148852A1 (en) * | 2006-12-20 | 2008-06-26 | Maki Voldi E | Acoustic transducer system for nondestructive testing of cement |
| KR101368196B1 (en) * | 2013-12-02 | 2014-02-28 | 한국지질자원연구원 | Apparatus for measuring wave transmission velocity and method for measuring wave transmission velocity using thereof |
| CN104237389A (en) * | 2014-09-24 | 2014-12-24 | 国家海洋局第二海洋研究所 | Small-scale sedimentary columnar sample sound velocity measuring and sampling platform |
Non-Patent Citations (1)
| Title |
|---|
| 陈健: "基于信号相位差的海水声速测量方法研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108760888A (en) * | 2018-07-27 | 2018-11-06 | 国家海洋局第海洋研究所 | Seabed sediment acoustics profile survey device and method |
| CN109696235A (en) * | 2018-12-27 | 2019-04-30 | 国家深海基地管理中心 | A kind of deep-sea effective sound velocity determines method |
| CN109696235B (en) * | 2018-12-27 | 2020-11-06 | 国家深海基地管理中心 | Deep sea effective sound velocity determination method |
| CN110954907A (en) * | 2019-11-26 | 2020-04-03 | 中国科学院深海科学与工程研究所 | A high-precision sediment acoustic detection device applied to deep-sea shallow surface |
| CN111561990A (en) * | 2020-04-30 | 2020-08-21 | 中国极地研究中心 | An observation device suitable for the acquisition of surface sound velocity in polar ice regions |
| CN113091877A (en) * | 2021-04-07 | 2021-07-09 | 上海海洋大学 | Device and method for measuring target strength of pressure-controlled underwater acoustic scatterer |
| CN113866275A (en) * | 2021-10-29 | 2021-12-31 | 广东工业大学 | Automatic acoustic layered measurement system and measurement method |
| CN113866275B (en) * | 2021-10-29 | 2023-08-01 | 广东工业大学 | Automatic acoustic layering measurement system and measurement method |
| CN115839998A (en) * | 2023-01-06 | 2023-03-24 | 自然资源部第一海洋研究所 | System and device for testing sound velocity of submarine sediment sample based on broadband transducer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104614446B (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104614446A (en) | Acoustic velocity measurement method based on marine bottom sediment | |
| CN105066918A (en) | Ultrasonic underwater target thickness measuring system and thickness measuring method | |
| CN102944608B (en) | Device and method for ultrasonic testing of corrugated pipe duck grouting compactness | |
| CN203732133U (en) | GSM (Global System for Mobile) alarm based ultrasonic liquid level measurement system | |
| CN109084864B (en) | Slender straight pipe type ultrasonic liquid level measuring device and measuring method | |
| CN104614445A (en) | Sound velocity measuring device based on seafloor sediments | |
| CN104614441A (en) | Sound velocity measuring system based on seafloor sediments | |
| CN104808123B (en) | A kind of partial discharge of switchgear detecting system | |
| CN105333925A (en) | Supersonic liquid level measuring instrument based on single-chip microcomputer | |
| CN102841343A (en) | Echo sounding apparatus calibration system based on industrial computer and calibration method | |
| CN205785207U (en) | A kind of novel measurement sea floor sampling depth device | |
| CN202141441U (en) | Automatic snow depth measurement device based on ultrasonic sensor | |
| CN204462081U (en) | The novel acoustic velocity measutement system based on marine bottom sediment | |
| CN107356667A (en) | Measuring method and device of the section containing rate | |
| CN202869605U (en) | FM pulse echo method based ultrasonic liquid level measuring device | |
| CN103033258A (en) | Remote high-directivity low-frequency sound wave transmission and measurement device and method | |
| CN104677519A (en) | Average water temperature measuring device for river mouth area | |
| CN204462080U (en) | The novel acoustic velocity measurement device based on marine bottom sediment | |
| CN110440896B (en) | Ultrasonic measurement system and measurement method | |
| CN206057253U (en) | A kind of acoustic characteristic measurement apparatus | |
| CN101762305A (en) | Plug type liquid level alarm | |
| CN104501909B (en) | A kind of small-range liquid level emasuring device and measuring method based on ultrasonic wave | |
| CN107560689B (en) | A method for measuring water depth under ice | |
| CN203414065U (en) | Probe seat apparatus used for measuring thickness of steel tube and applied in ultrasonic-wave rotated diagnostic machine | |
| CN210604960U (en) | Sound source positioning device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170510 Termination date: 20180120 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |