CN104614445A - Sound velocity measuring device based on seafloor sediments - Google Patents
Sound velocity measuring device based on seafloor sediments Download PDFInfo
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- CN104614445A CN104614445A CN201510026389.1A CN201510026389A CN104614445A CN 104614445 A CN104614445 A CN 104614445A CN 201510026389 A CN201510026389 A CN 201510026389A CN 104614445 A CN104614445 A CN 104614445A
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Abstract
The invention relates to a sound velocity measuring device based on seafloor sediments. The device is mainly and technically characterized by comprising a base, a vertical support, a hand crank, a precision ball screw, a linear sliding block, a receiving transducer support, a receiving transducer, a transmitting transducer support, a transmitting transducer and a distance measuring sensor, wherein the vertical support and the transmitting transducer support are mounted on the base, the transmitting transducer is mounted on the transmitting transducer support, the receiving transducer support is horizontally mounted on the outer side of the linear sliding block, the receiving transducer is mounted at the bottom of the receiving transducer support, a sediment sample tube is mounted between the receiving transducer and the transmitting transducer, and the receiving transducer, the transmitting transducer and the distance measuring sensor are connected with a sound velocity measuring instrument. The sediment sample tube is vertically arranged between the receiving transducer and the transmitting transducer, the distance measuring sensor is used for distance measurement, and the device has the advantages of reasonable design, compact structure, high measurement accuracy, convenience in use and the like.
Description
Technical field
The invention belongs to acoustic velocity measutement technical field, especially a kind of acoustic velocity measurement device 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.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of reasonable in design, acoustic velocity measurement device based on marine bottom sediment that compact conformation, measuring accuracy are high and easy to use is provided.
The present invention solves its technical matters and takes following technical scheme to realize:
A kind of acoustic velocity measurement device based on marine bottom sediment, comprise base, vertical support frame, wind, precision ball screw, linear slide block, receiving transducer support, receiving transducer, transmitting transducer support, transmitting transducer and distance measuring sensor, vertical support frame and transmitting transducer support installing are on base, transmitting transducer is arranged on transmitting transducer support, precision ball screw is arranged on vertical support frame, 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, linear slide block can slide up and down and be arranged on precision ball screw, 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 is installed between receiving transducer and transmitting transducer, the bottom of this sediment sample pipe is inlaid in transmitting transducer support, described receiving transducer, transmitting transducer and distance measuring sensor are connected with acoustic velocity measutement instrument.
And, the bottom sidewall of transmitting transducer support is provided with a draining tap.
And described transmitting transducer adopts the transmitting transducer of narrow beam.
And what described distance measuring sensor adopted is photoelectric encoder.
And described sediment sample pipe diameter is 73mm, and sediment sample length of tube is 50 ~ 200mm, receiving transducer and transmitting transducer plane relative angle are not more than 0.1 degree.
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 the distance measuring sensor be arranged on above receiving transducer, thus realize sedimental acoustic velocity measutement function, under the prerequisite ensureing range measurement accuracy, reduce sample length.
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 structural representation of the present invention;
Fig. 2 is the circuit block diagram of measurement instrument.
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 acoustic velocity measurement device based on marine bottom sediment, as shown in Figure 1, 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 is comprised.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.
In the present embodiment, what distance measuring sensor adopted is photoelectric encoder, when measuring, by wind, distance measuring sensor is rotated to the top of linear slide block, this photoelectric sensor can accurate measure linear slide block moving displacement, thus measures the accurate distance between transmitting transducer and receiving transducer.Receiving transducer support slides up and down with linear slide block, according to the length of sediment sample pipe, regulates the distance between receiving transducer and transmitting transducer.Transmitting transducer adopts the transmitting transducer of narrow beam, can reduce the impact of dielectric stratifying on acoustic velocity measutement.
In the present embodiment, described sediment sample pipe diameter is 73mm, and sediment sample length of tube is 50 ~ 200mm, and receiving transducer and transmitting transducer plane relative angle are not more than 0.1 degree.Described precision ball screw helical pitch 5mm, precision ball screw positioning precision 0.02mm, range observation error is less than 0.05mm.
This acoustic velocity measurement device and measurement instrument are with the use of the acoustic velocity measutement function completing marine bottom sediment.This measurement instrument as shown in Figure 2, comprise 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.
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 (5)
1. the acoustic velocity measurement device based on marine bottom sediment, it is characterized in that: comprise base, vertical support frame, wind, precision ball screw, linear slide block, receiving transducer support, receiving transducer, transmitting transducer support, transmitting transducer and distance measuring sensor, vertical support frame and transmitting transducer support installing are on base, transmitting transducer is arranged on transmitting transducer support, precision ball screw is arranged on vertical support frame, 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, linear slide block can slide up and down and be arranged on precision ball screw, 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 is installed between receiving transducer and transmitting transducer, the bottom of this sediment sample pipe is inlaid in transmitting transducer support, described receiving transducer, transmitting transducer and distance measuring sensor are connected with acoustic velocity measutement instrument.
2. a kind of acoustic velocity measurement device based on marine bottom sediment according to claim 1, is characterized in that: on the bottom sidewall of transmitting transducer support, be provided with a draining tap.
3. a kind of acoustic velocity measurement device based on marine bottom sediment according to claim 1 and 2, is characterized in that: described transmitting transducer adopts the transmitting transducer of narrow beam.
4. a kind of acoustic velocity measurement device based on marine bottom sediment according to claim 1 and 2, is characterized in that: what described distance measuring sensor adopted is photoelectric encoder.
5. a kind of acoustic velocity measurement device based on marine bottom sediment according to claim 1 and 2, it is characterized in that: described sediment sample pipe diameter is 73mm, sediment sample length of tube is 50 ~ 200mm, and receiving transducer and transmitting transducer plane relative angle are not more than 0.1 degree.
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| CN201510026389.1A CN104614445A (en) | 2015-01-20 | 2015-01-20 | Sound velocity measuring device based on seafloor sediments |
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Cited By (5)
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| CN105911141A (en) * | 2016-05-31 | 2016-08-31 | 广东工业大学 | Submarine sediment high and low frequency acoustic characteristic measurement device |
| CN106018550A (en) * | 2016-07-01 | 2016-10-12 | 广东工业大学 | Measurement device and method for acoustic characteristics |
| CN108169329A (en) * | 2018-02-23 | 2018-06-15 | 国家海洋局第海洋研究所 | A kind of adaptive columnar deposit sample acoustic characteristic measuring device and method |
| 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 |
| CN113504307A (en) * | 2021-09-10 | 2021-10-15 | 西南石油大学 | Multi-frequency core sound velocity measuring device |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105911141A (en) * | 2016-05-31 | 2016-08-31 | 广东工业大学 | Submarine sediment high and low frequency acoustic characteristic measurement device |
| CN105911141B (en) * | 2016-05-31 | 2018-11-20 | 广东工业大学 | A kind of bottom sediment low-and high-frequency acoustic characteristic measuring device |
| 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 |
| CN108169329A (en) * | 2018-02-23 | 2018-06-15 | 国家海洋局第海洋研究所 | A kind of adaptive columnar deposit sample acoustic characteristic measuring device and method |
| CN108169329B (en) * | 2018-02-23 | 2023-10-31 | 国家海洋局第一海洋研究所 | Device and method for measuring acoustic characteristics of columnar sample of self-adaptive sediment |
| 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 |
| CN113504307A (en) * | 2021-09-10 | 2021-10-15 | 西南石油大学 | Multi-frequency core sound velocity measuring device |
| CN113504307B (en) * | 2021-09-10 | 2021-12-21 | 西南石油大学 | Multi-frequency core sound velocity measuring device |
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Application publication date: 20150513 |