CN204462081U - The novel acoustic velocity measutement system based on marine bottom sediment - Google Patents
The novel acoustic velocity measutement system based on marine bottom sediment Download PDFInfo
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- CN204462081U CN204462081U CN201520036853.0U CN201520036853U CN204462081U CN 204462081 U CN204462081 U CN 204462081U CN 201520036853 U CN201520036853 U CN 201520036853U CN 204462081 U CN204462081 U CN 204462081U
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Abstract
The utility model relates to a kind of novel acoustic velocity measutement system based on marine bottom sediment, its technical characteristics is: comprise base, vertical support frame, wind, precision ball screw, linear slide block, receiving transducer support, receiving transducer, transmitting transducer support, transmitting transducer, distance measuring sensor and measurement instrument, measurement instrument comprises signal processing module, D/A module, light-coupled isolation module, power amplifier module, amplification filtering module, A/D module and digital display device, this signal processing module passes through D/A module, light-coupled isolation module, power amplifier module is connected with transmitting transducer, this signal processing module passes through A/D module, amplification filtering module is connected with receiving transducer.The utility model reduces sample length under the prerequisite ensureing range measurement accuracy, have reasonable in design, compact conformation, measuring accuracy are high and the feature such as easy to use.
Description
Technical field
The utility model belongs to acoustic velocity measutement technical field, especially a kind of novel acoustic velocity measutement system 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 purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of reasonable in design, novel acoustic velocity measutement system based on marine bottom sediment that compact conformation, measuring accuracy are high and easy to use.
The utility model solves its technical matters and takes following technical scheme to realize:
A kind of novel acoustic velocity measutement system 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, distance measuring sensor and measurement instrument, 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 measurement instrument comprises signal processing module, D/A module, light-coupled isolation module, power amplifier module, amplification filtering module, A/D module and digital display device, 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.
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 utility model and good effect are:
1, sediment sample pipe vertically arranges between receiving transducer and transmitting transducer by the utility model, adopt distance measuring sensor measure the accurate distance between transmitting transducer and receiving transducer and carry out velocity of sound calculating by signal processing module, under the prerequisite ensureing range measurement accuracy, reduce sample length.
2, the utility model 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.
3, the utility model is when measuring, and can not destroy the sample in sediment sample pipe.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
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 utility model embodiment is further described:
A kind of novel acoustic velocity measutement system 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.
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.
It is emphasized that; embodiment described in the utility model is illustrative; instead of it is determinate; therefore the utility model comprises the embodiment be not limited to described in embodiment; every other embodiments drawn according to the technical solution of the utility model by those skilled in the art, belong to the scope of the utility model protection equally.
Claims (5)
1. a novel acoustic velocity measutement system 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, distance measuring sensor and measurement instrument, 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 measurement instrument comprises signal processing module, D/A module, light-coupled isolation module, power amplifier module, amplification filtering module, A/D module and digital display device, 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.
2. the novel acoustic velocity measutement system 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. the novel acoustic velocity measutement system 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. the novel acoustic velocity measutement system 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. the novel acoustic velocity measutement system 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520036853.0U CN204462081U (en) | 2015-01-20 | 2015-01-20 | The novel acoustic velocity measutement system based on marine bottom sediment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520036853.0U CN204462081U (en) | 2015-01-20 | 2015-01-20 | The novel acoustic velocity measutement system based on marine bottom sediment |
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| CN204462081U true CN204462081U (en) | 2015-07-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614441A (en) * | 2015-01-20 | 2015-05-13 | 中国人民解放军92859部队 | Sound velocity measuring system based on seafloor sediments |
-
2015
- 2015-01-20 CN CN201520036853.0U patent/CN204462081U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614441A (en) * | 2015-01-20 | 2015-05-13 | 中国人民解放军92859部队 | Sound velocity measuring system based on seafloor sediments |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20180120 |