CN113091878A - Device for underwater sound velocity measurement and using method thereof - Google Patents
Device for underwater sound velocity measurement and using method thereof Download PDFInfo
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- CN113091878A CN113091878A CN202110370510.8A CN202110370510A CN113091878A CN 113091878 A CN113091878 A CN 113091878A CN 202110370510 A CN202110370510 A CN 202110370510A CN 113091878 A CN113091878 A CN 113091878A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H5/00—Measuring propagation velocity of ultrasonic, sonic or infrasonic waves, e.g. of pressure waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
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- Testing Or Calibration Of Command Recording Devices (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention provides a device for underwater sound velocity measurement and a using method thereof, wherein the device comprises a sound velocity measuring device, a booster pump and a control device; the sound velocity measuring device comprises a sound velocity measuring container, and a sound wave transmitting transducer, a hydrophone, a temperature controller, a salinity indicator and a laser ranging device which are connected to the sound velocity measuring container; the control device is connected with the sound wave transmitting transducer, the hydrophone, the temperature controller, the salinity indicator and the laser ranging device. The device for measuring the underwater sound velocity and the using method thereof can simulate sound velocity measurement under different water depths, different temperatures and different salinity in the ocean, correct the sound velocity error in water measured in an indirect mode, and improve the measurement precision of instruments such as CTD (computer-to-digital converter) and the like.
Description
Technical Field
The invention relates to the field of marine science, in particular to a device for measuring underwater sound velocity and a using method thereof.
Background
The underwater sound velocity is the most basic parameter information required for underwater sound research and ocean engineering practice, and is an important physical parameter reflecting the characteristics of seawater media. The underwater sound velocity refers to the propagation velocity of sound waves in water, and due to the existence of a seawater medium, the attenuation of other signals (such as optical signals, electromagnetic signals and the like) except for acoustic signals is very serious, and the sound waves are the only known energy signals capable of realizing long-distance propagation in the ocean. Due to the uneven temperature and salinity distribution in the seawater medium, the sound velocity in different areas and different depths in the ocean is greatly different. The underwater sound velocity is accurately measured, correction information can be provided for a fish finder and a depth finder, measuring errors of the apparatus are reduced, the underwater sound velocity measuring instrument is also one of important basic information of underwater positioning, and the underwater sound velocity measuring instrument has very important significance.
Currently, there are two main types of methods for underwater sound velocity measurement. One is a direct measurement method, which usually uses a transceiver transducer to measure the sound velocity within a fixed distance, and at the same time, uses a pressure sensor and a temperature compensation device to measure the water depth. The working principle of the method is that the sound velocity is obtained by measuring the time interval of the sound pulse passing through a certain distance. A sonar instrument that performs direct measurements of sound velocity is called an "acoustic velocimeter". The second type is an indirect measurement method, the main influence factors of the sound velocity are temperature (T), salinity (C), pressure intensity (D) and the like, a complex functional relationship exists between the sound velocity and the three parameters, and a plurality of ocean science families continuously explore the sound velocity based on the complex functional relationship and provide a plurality of empirical formulas. The method for indirectly measuring the sound velocity is to use an instrument to measure the temperature, salinity and depth in the seawater, then use a related empirical formula to convert the sound velocity, and use the instrument for indirectly measuring the sound velocity.
However, the distribution of sound velocity in the ocean is variable, and the distribution has regional variation and seasonal variation, and even the sound velocity measured in different weeks and days in the same region is different. Meanwhile, the temperature, the salinity and the pressure have the characteristics of changing along with the depth, so the sound velocity of the seawater mainly changes in the depth, and the measurement of the sound velocity at different depths is very difficult in the deep sea. At present, there are many empirical formulas, but the sound velocity obtained by different empirical formulas is very different. Therefore, it is necessary to develop a measuring device for simulating underwater environment by controlling underwater pressure, temperature and salinity so as to determine the sound velocity at different depths of underwater.
At present, in the ocean, a thermohaline depth gauge is mostly used for measuring sound velocity in indirect water, and is mainly used for acquiring temperature, salinity and depth information, wherein the depth is obtained by measuring conductivity. The more commonly used thermohaline depth gauge is CTD, which mainly comprises three major parts, namely an underwater probe, a recording display and a connecting cable, wherein the underwater probe comprises a thermosensitive element, a pressure-sensitive element and the like, is installed on a bracket together with a reversed water sampler, can be thrown to different depths and is used for collecting information such as thermohaline depth and the like and collecting water samples; the recording display is arranged in the cabin, receives, processes, records and displays various information data transmitted from the probe in the seawater through the armored cable, and also has the function of a manipulator of the whole set of equipment; the connecting computer is used for connecting the probe and the display to perform data transmission. There is also a throwing type thermohaloid depth instrument XBT, which is similar to the CTD in structure except that the probe and the recording display are connected by a thin signal transmission line instead of an armored cable, the related information measured by the probe is transmitted to a receiving system through a wire, and the water layer is determined according to the sinking time of the instrument.
The prior art has the following disadvantages:
1. when the sound velocity is measured in the ocean deep water area, when the sound velocity meter is used for directly measuring the sound velocity, although the accuracy of the measured sound velocity is high, the instrument is inconvenient to recover, the implementation difficulty coefficient is large, the measurement cannot be carried out during sailing, the equipment is expensive, the measurement efficiency is low, the obtained parameters are single, and the implementation is difficult in large-area sound velocity field measurement.
2. When the thermohaline depth gauge is used for measuring the sound velocity in an indirect mode, the sound velocity conversion needs to be carried out by referring to an empirical formula, but different regions have different empirical formulas, and moreover, the conversion result of the empirical formula is directly different from the actual sound velocity frequently, so that partial scientific research and engineering requirements cannot be met.
3. At present, when the sound velocity of a deep water area is measured, a longer signal cable is often needed, the instrument is inconvenient to recover, the measurement is difficult to control, and the measurement is more difficult particularly when large ocean currents and swell occur; when the throwing type instrument is used for measuring the sound velocity, the measurement of the sound velocity of the water layer is difficult to determine, and the problems of abrasion of a conducting wire, easy collision of a probe and the like exist, so that data errors are caused.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the device for measuring the underwater sound velocity and the using method thereof.
In order to achieve the above object, the present invention provides an apparatus for underwater sound velocity measurement, comprising a sound velocity measuring device, a booster pump and a control device; the sound velocity measuring device comprises a sound velocity measuring container, and a sound wave transmitting transducer, a hydrophone, a temperature controller, a salinity indicator and a laser ranging device which are connected to the sound velocity measuring container; the control device is connected with the sound wave transmitting transducer, the hydrophone, the temperature controller, the salinity indicator and the laser ranging device.
Preferably, the sound velocity measurement container is made of transparent acrylic materials, an inverted T-shaped pipeline is formed inside the sound velocity measurement container, the inverted T-shaped pipeline comprises a horizontal pipeline and a vertical pipeline, and the bottom of the vertical pipeline is communicated with the top surface of the middle part of the horizontal pipeline; the top of the vertical pipeline is detachably connected with a pipeline adapter, and the pipeline adapter is detachably connected with a boosting hose and is connected with the boosting pump through the boosting hose; two ends of the horizontal pipeline are respectively connected with the sound wave transmitting transducer and the hydrophone; the laser ranging device is fixed on one side of the sound wave transmitting transducer; the temperature controller and the salinity indicator are fixed on the side wall of the vertical pipeline.
Preferably, the device further comprises a first pressure display and a second pressure display which are arranged on the pressurization hose; the first pressure display is disposed adjacent to the booster pump; the second pressure display is disposed adjacent the pipe adapter; the control device is connected with the first pressure display and the second pressure display.
Preferably, the control means comprises a display and a plurality of control buttons.
The invention relates to a use method of a device for underwater sound velocity measurement, which comprises the following steps:
s1: detaching the pipeline adapter from the top of the vertical pipeline and injecting a fluid sample into the inverted T-shaped pipeline, wherein the liquid level of the fluid sample is higher than the temperature controller and the salinity indicator;
s2: the top of the vertical pipeline is hermetically provided with the pipeline adapter and is sequentially connected with the booster hose and the booster pump through the pipeline adapter; opening the control device, wherein the control device receives and displays the salinity of the fluid sample measured by the salinity indicator; if the salinity does not meet the required experimental conditions, fresh water or brine is filled from the top of the vertical pipeline for adjustment by dismounting the pipeline adapter until the salinity meets the required experimental conditions, then the pipeline adapter is hermetically installed on the top of the vertical pipeline, and the pressurizing hose and the pressurizing pump are sequentially connected through the pipeline adapter;
s3: starting the booster pump, checking the pressure and the temperature in the inverted T-shaped pipeline through the control device, and adjusting the pressure and the temperature in the inverted T-shaped pipeline in a manner of adjusting the temperature controller and increasing and releasing pressure until required experimental conditions are met;
s4: measuring and correcting the distance L between the transducer and the hydrophone in real time through the laser ranging device;
s5: starting the hydrophone and determining that the hydrophone works normally; then starting the sound wave transmitting transducer to transmit sound waves, recording the sound wave transmitting time of transmitting the sound waves and the sound wave collecting time of the sound waves collected by the hydrophone, and measuring and calculating the time difference T between the sound wave collecting time and the sound wave transmitting time in real time;
s6: releasing the pressure of the inverted T-shaped pipeline, and then discharging the fluid sample after the temperature is reduced to a preset temperature;
s7: the control means calculates the sound velocity V of the fluid sample according to equation (1) and displays:
preferably, the fluid samples comprise simulated water samples or other fluid samples of different salinity and pH values collected or self-configured by the area to be tested.
Preferably, the method further comprises the steps of: and changing the pressure, the temperature and the salinity in the inverted T-shaped pipeline, and displaying the sound velocity of the fluid sample in different states in real time.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
1. the invention can be used for measuring the sound velocity in water under different simulated environments in a laboratory;
2. the method can be verified with sound velocity data measured by a CTD isothermal salt depth instrument, so that the conversion error of an empirical formula is reduced;
3. the berthing of the ship during investigation is reduced; the problem of difficult data acquisition does not exist.
Drawings
Fig. 1 is a schematic structural diagram of an apparatus for underwater sound velocity measurement according to an embodiment of the present invention.
Detailed Description
The following description of the preferred embodiment of the invention is given with reference to the accompanying drawings, fig. 1, and will make the function and features of the invention better understood.
Referring to fig. 1, an apparatus for underwater sound velocity measurement according to an embodiment of the present invention includes a sound velocity measurement apparatus 1, a booster pump 2, and a control apparatus 3; the sound velocity determination device 1 comprises a sound velocity determination container 11, and a sound wave transmitting transducer 12, a hydrophone 13, a temperature controller 14, a salinity indicator 15 and a laser distance measurement device 16 which are connected to the sound velocity determination container 11; the control device 3 is connected with a sound wave transmitting transducer 12, a hydrophone 13, a temperature controller 14, a salinity indicator 15 and a laser ranging device 16.
The sound velocity measurement container 11 is made of transparent acrylic materials, an inverted T-shaped pipeline 111 is formed inside the sound velocity measurement container, the inverted T-shaped pipeline 111 comprises a horizontal pipeline and a vertical pipeline, and the bottom of the vertical pipeline is communicated with the top surface of the middle part of the horizontal pipeline; the top of the vertical pipeline is detachably connected with a pipeline adapter 4, and the pipeline adapter 4 is detachably connected with a pressurizing hose 5 and is connected with a pressurizing pump 2 through the pressurizing hose 5; two ends of the horizontal pipeline are respectively connected with the sound wave transmitting transducer 12 and the hydrophone 13; the laser distance measuring device 16 is fixed on one side of the sound wave transmitting transducer 12; the temperature controller 14 and salinity indicator 15 are fixed to the side wall of the vertical pipe.
A first pressure display 6 and a second pressure display 7 which are arranged on the pressurization hose 5; the first pressure display 6 is arranged adjacent to the booster pump 2; a second pressure display 7 is provided adjacent the pipe adaptor 4; the control device 3 is connected to a first pressure display 6 and a second pressure display 7.
The control means 3 comprise a display 31 and a plurality of control buttons 32.
The use method of the device for underwater sound velocity measurement based on the embodiment comprises the following steps:
s1: detaching the pipeline adapter 4 from the top of the vertical pipeline and injecting a fluid sample into the inverted T-shaped pipeline 111, wherein the liquid level of the fluid sample is higher than the temperature controller 14 and the salinity indicator 15;
s2: an upper pipeline adapter 4 is hermetically arranged at the top of the vertical pipeline and is sequentially connected with a booster hose 5 and a booster pump 2 through the pipeline adapter 4; opening the control device 3, wherein the control device 3 receives and displays the salinity of the fluid sample measured by the salinity indicator 15; if the salinity does not meet the required experimental conditions, fresh water or brine is filled from the top of the vertical pipeline for adjustment by dismounting the pipeline adapter 4 until the salinity meets the required experimental conditions, then the pipeline adapter 4 is hermetically installed on the top of the vertical pipeline, and the pressurizing hose 5 and the pressurizing pump 2 are sequentially connected through the pipeline adapter 4;
s3: starting the booster pump 2, checking the pressure and the temperature in the inverted T-shaped pipeline 111 through the control device 3, and adjusting the pressure and the temperature in the inverted T-shaped pipeline 111 through adjusting the temperature controller 14 and increasing and decreasing the pressure until required experimental conditions are met; in this embodiment, the pressure in the inverted T-shaped pipeline 111 can be detected and obtained by the second pressure display 7;
s4: measuring and correcting the distance L between the transducer and the hydrophone 13 in real time by a laser ranging device 16;
s5: starting the hydrophone 13 and determining that the hydrophone 13 works normally; then starting the sound wave transmitting transducer 12 to transmit sound waves, recording the sound wave transmitting time of the transmitted sound waves and the sound wave collecting time of the sound waves collected by the hydrophone 13, and measuring and calculating the time difference T between the sound wave collecting time and the sound wave transmitting time in real time;
s6: releasing the pressure of the inverted T-shaped pipeline 111, and discharging a liquid sample after the temperature is reduced to a preset temperature;
s7: the control device 3 calculates the sound velocity V of the fluid sample according to the formula (1) and displays:
in this embodiment, the fluid samples include simulated water samples or other fluid samples of different salinity and ph values collected or configured by the area to be tested.
In this embodiment, the method further includes the steps of: the pressure, temperature and salinity inside the inverted T-shaped pipe 111 are changed to display the sound velocity of the fluid sample at different states in real time.
While the invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes in form and detail can be made therein without departing from the spirit and scope of the invention. Therefore, certain details of the embodiments should not be construed as limitations on the invention, which should be interpreted as having a scope defined by the appended claims.
Claims (7)
1. A device for underwater sound velocity measurement is characterized by comprising a sound velocity measuring device, a booster pump and a control device; the sound velocity measuring device comprises a sound velocity measuring container, and a sound wave transmitting transducer, a hydrophone, a temperature controller, a salinity indicator and a laser ranging device which are connected to the sound velocity measuring container; the control device is connected with the sound wave transmitting transducer, the hydrophone, the temperature controller, the salinity indicator and the laser ranging device.
2. The device for underwater sound speed measurement according to claim 1, wherein the sound speed measurement container is made of transparent acrylic material and internally forms an inverted T-shaped pipeline, the inverted T-shaped pipeline comprises a horizontal pipeline and a vertical pipeline, and the bottom of the vertical pipeline is communicated with the top surface of the middle part of the horizontal pipeline; the top of the vertical pipeline is detachably connected with a pipeline adapter, and the pipeline adapter is detachably connected with a boosting hose and is connected with the boosting pump through the boosting hose; two ends of the horizontal pipeline are respectively connected with the sound wave transmitting transducer and the hydrophone; the laser ranging device is fixed on one side of the sound wave transmitting transducer; the temperature controller and the salinity indicator are fixed on the side wall of the vertical pipeline.
3. The apparatus for underwater sound speed measurement of claim 2, further comprising a first pressure display and a second pressure display mounted to the pressurization hose; the first pressure display is disposed adjacent to the booster pump; the second pressure display is disposed adjacent the pipe adapter; the control device is connected with the first pressure display and the second pressure display.
4. An apparatus for underwater sound speed measurement according to claim 3, wherein the control means includes a display and a plurality of control buttons.
5. Use of the apparatus for underwater sound speed measurement according to claim 4, comprising the steps of:
s1: detaching the pipeline adapter from the top of the vertical pipeline and injecting a fluid sample into the inverted T-shaped pipeline, wherein the liquid level of the fluid sample is higher than the temperature controller and the salinity indicator;
s2: the top of the vertical pipeline is hermetically provided with the pipeline adapter and is sequentially connected with the booster hose and the booster pump through the pipeline adapter; opening the control device, wherein the control device receives and displays the salinity of the fluid sample measured by the salinity indicator; if the salinity does not meet the required experimental conditions, fresh water or brine is filled from the top of the vertical pipeline for adjustment by dismounting the pipeline adapter until the salinity meets the required experimental conditions, then the pipeline adapter is hermetically installed on the top of the vertical pipeline, and the pressurizing hose and the pressurizing pump are sequentially connected through the pipeline adapter;
s3: starting the booster pump, checking the pressure and the temperature in the inverted T-shaped pipeline through the control device, and adjusting the pressure and the temperature in the inverted T-shaped pipeline in a manner of adjusting the temperature controller and increasing and releasing pressure until required experimental conditions are met;
s4: measuring and correcting the distance L between the transducer and the hydrophone in real time through the laser ranging device;
s5: starting the hydrophone and determining that the hydrophone works normally; then starting the sound wave transmitting transducer to transmit sound waves, recording the sound wave transmitting time of transmitting the sound waves and the sound wave collecting time of the sound waves collected by the hydrophone, and measuring and calculating the time difference T between the sound wave collecting time and the sound wave transmitting time in real time;
s6: releasing the pressure of the inverted T-shaped pipeline, and then discharging the fluid sample after the temperature is reduced to a preset temperature;
s7: the control means calculates the sound velocity V of the fluid sample according to equation (1) and displays:
6. the use method according to claim 5, wherein the fluid samples comprise simulated water samples or other fluid samples of different salinity and pH values collected or self-configured at the area to be tested.
7. The use of claim 5, further comprising the steps of: and changing the pressure, the temperature and the salinity in the inverted T-shaped pipeline, and displaying the sound velocity of the fluid sample in different states in real time.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110370510.8A CN113091878A (en) | 2021-04-07 | 2021-04-07 | Device for underwater sound velocity measurement and using method thereof |
| LU500294A LU500294B1 (en) | 2021-04-07 | 2021-06-17 | Underwater sound velocity measuring apparatus and method for operating same |
| AU2021103469A AU2021103469A4 (en) | 2021-04-07 | 2021-06-18 | Underwater sound velocity measuring apparatus and measuring method using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110370510.8A CN113091878A (en) | 2021-04-07 | 2021-04-07 | Device for underwater sound velocity measurement and using method thereof |
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| Publication Number | Publication Date |
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| CN113091878A true CN113091878A (en) | 2021-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110370510.8A Pending CN113091878A (en) | 2021-04-07 | 2021-04-07 | Device for underwater sound velocity measurement and using method thereof |
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| Country | Link |
|---|---|
| CN (1) | CN113091878A (en) |
| AU (1) | AU2021103469A4 (en) |
| LU (1) | LU500294B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414028A (en) * | 2022-01-25 | 2022-04-29 | 重庆医科大学 | Device and method for measuring sound velocity of medium in sound wave guide tube based on sub-wavelength scale |
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2021
- 2021-04-07 CN CN202110370510.8A patent/CN113091878A/en active Pending
- 2021-06-17 LU LU500294A patent/LU500294B1/en active IP Right Grant
- 2021-06-18 AU AU2021103469A patent/AU2021103469A4/en not_active Ceased
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| CN114414028B (en) * | 2022-01-25 | 2023-11-24 | 重庆医科大学 | Device and method for measuring sound velocity of medium in sound waveguide tube based on sub-wavelength scale |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2021103469A4 (en) | 2021-08-05 |
| LU500294B1 (en) | 2021-12-17 |
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Inventor after: Zhang Jin Inventor after: Tong Jianfeng Inventor before: Tong Jianfeng Inventor before: Zhang Jin |