CN115839998A - System and device for testing sound velocity of submarine sediment sample based on broadband transducer - Google Patents
System and device for testing sound velocity of submarine sediment sample based on broadband transducer Download PDFInfo
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- CN115839998A CN115839998A CN202310020820.6A CN202310020820A CN115839998A CN 115839998 A CN115839998 A CN 115839998A CN 202310020820 A CN202310020820 A CN 202310020820A CN 115839998 A CN115839998 A CN 115839998A
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Abstract
The invention discloses a system and a device for testing sound velocity of a submarine sediment sample based on a broadband transducer, and relates to the field of submarine sediment measurement, wherein the system is connected with an upper computer, and the upper computer outputs a control signal; placing a seafloor sediment sample on a sample acoustic testing platform; the signal emission and collection unit outputs a sound source signal according to a control signal; measuring length data of the sample by using a displacement sensor; the multi-resonance-point transmitting transducer transmits ultrasonic signals with corresponding frequencies according to the sound source signals; the broadband receiving transducer is connected with the signal transmitting and collecting unit and receives a sample signal obtained by the ultrasonic signal passing through the sediment sample at the bottom of the sea; the upper computer obtains sound velocity data of the sample at different frequencies according to the sample signals of different frequencies collected by the signal emission and collection unit and the sample length data measured by the displacement sensor; the sound velocity dispersion characteristic of the submarine sediment sample is researched without replacing transducers with different frequencies, so that the efficiency of testing the submarine sediment sample is improved.
Description
Technical Field
The invention relates to the field of measurement of submarine sediments, in particular to a system and a device for testing sound velocity of a submarine sediment sample based on a broadband transducer.
Background
The research on the submarine sediments has important significance in the fields of economic construction, national defense and the like. Currently, the detection of the seabed sediments is mainly to perform acoustic measurement by ultrasonic waves, and the physical properties and internal structural characteristics of the sediments are researched through acoustic parameters such as sound velocity and sound attenuation in the sediments.
When the sound velocity of the submarine sediment sample is tested in a laboratory, if the sound velocity dispersion characteristic of the submarine sediment sample is known, transducers with different frequencies need to be replaced, and therefore the testing efficiency is greatly reduced.
Disclosure of Invention
The invention aims to provide a system and a device for testing the sound velocity of a submarine sediment sample based on a broadband transducer, which can improve the sound velocity testing efficiency of the submarine sediment sample.
In order to achieve the purpose, the invention provides the following scheme:
a submarine sediment sample sound velocity test system based on a broadband transducer is connected with an upper computer, and the upper computer is used for outputting control signals for controlling and transmitting ultrasonic signals with different frequencies; placing a seafloor sediment sample on a sample acoustic testing platform; the system for testing the sound velocity of the submarine sediment sample based on the broadband transducer comprises:
the displacement sensor is connected with the upper computer, fixed on the sample acoustic testing platform, used for measuring sample length data and sending the sample length data to the upper computer;
the signal transmitting and collecting unit is connected with the upper computer and used for outputting a sound source signal according to the control signal;
the multi-resonance-point transmitting transducer is connected with the signal transmitting and collecting unit and is used for transmitting ultrasonic signals with corresponding frequencies according to sound source signals; the multi-resonance-point transmitting transducer is fixed on the sample acoustic testing platform; the ultrasonic signal penetrates through the submarine sediment sample to obtain a sample signal;
the broadband receiving transducer is connected with the signal transmitting and collecting unit, is fixed on the sample acoustic testing platform and is used for receiving the sample signal and sending the sample signal to the signal transmitting and collecting unit; the signal emission and collection unit is also used for sending the collected sample signals to the upper computer, and the upper computer is used for obtaining sample sound velocity data according to the sample length data and the sample signals.
Optionally, the signal emission and collection unit includes:
the preamplifier is connected with the broadband receiving transducer and is used for amplifying the sample signal to obtain an amplified sample signal;
the analog-to-digital converter is connected with the preamplifier and is used for performing analog-to-digital conversion on the amplified sample signal to obtain a sample signal in a digital signal form;
the control panel is connected with the analog-to-digital converter and the upper computer and used for collecting the sample signals in the form of the digital signals and sending the sample signals to the upper computer; the upper computer is used for obtaining the sound velocity data of the sample according to the sample signal in the form of the digital signal; the control board is also used for outputting an initial signal according to the control signal;
and the digital-to-analog converter is connected with the control panel and the multi-resonance-point transmitting transducer and is used for obtaining a sound source signal according to the initial signal and sending the sound source signal to the multi-resonance-point transmitting transducer.
Preferably, the control board is an FPGA control board.
Optionally, the broadband transducer-based seafloor sediment sample sound speed test system further includes:
and the power amplifier is connected with the signal transmitting and collecting unit and the multi-resonance-point transmitting transducer and is used for improving the quality of sound source signals.
Optionally, the broadband transducer-based seafloor sediment sample sound speed test system further includes:
and the impedance matching device is arranged between the power amplifier and the multi-resonance-point transmitting transducer and is used for matching an impedance network and pure resistance characteristics between the power amplifier and the multi-resonance-point transmitting transducer.
Preferably, the broadband transducer-based seafloor sediment sample sound speed test system further comprises:
and the power supply module is connected with the signal transmitting and collecting unit and the power amplifier and used for supplying power to the signal transmitting and collecting unit and the power amplifier.
Optionally, the power amplifier is connected to the impedance match by a two-core power cable.
Optionally, the impedance matching is connected to the multiple resonance point transmitting transducer through a bnc cable.
Optionally, the broadband receiving transducer is connected with the signal transmitting and acquiring unit through a bnc cable.
On the other hand, in order to achieve the purpose, the invention also provides the following scheme:
a broadband transducer based seafloor sediment sample sound speed testing device comprises:
the sound velocity testing system for the submarine sediment sample based on the broadband transducer is disclosed;
the sample acoustic testing platform is used for placing a submarine sediment sample; the multi-resonance-point transmitting transducer and the broadband receiving transducer of the submarine sediment sample sound velocity testing system based on the broadband transducer are fixed on a sample acoustic testing platform;
the upper computer is connected with the signal transmitting and collecting unit of the sound velocity testing system of the submarine sediment sample based on the broadband transducer and is used for outputting a control signal to control the signal transmitting and collecting unit to output a sound source signal; the sound source signal is used for enabling the multi-resonance-point transmitting transducer to transmit ultrasonic signals with corresponding frequencies, and the ultrasonic signals penetrate through the seabed sediment sample to obtain sample signals; and the upper computer obtains sample sound velocity data according to the sample signals collected by the signal emission and collection unit and the sample length data measured by the displacement sensor.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the system and the device for testing the sound velocity of the submarine sediment sample based on the broadband transducer are characterized in that the displacement sensor is connected with an upper computer, and the displacement sensor measures the length of the submarine sediment sample to obtain sample length data; the signal emission and collection unit is connected with the upper computer and outputs a sound source signal according to a control signal which is output by the upper computer and controls the emission of ultrasonic signals with different frequencies; the multiple resonance point transmitting transducer is connected with the signal transmitting and collecting unit and transmits ultrasonic signals with corresponding frequencies according to sound source signals; the multi-resonance-point transmitting transducer is fixed on the sample acoustic testing platform; the ultrasonic signal penetrates through the submarine sediment sample to obtain a sample signal; the broadband receiving transducer is connected with the signal transmitting and collecting unit and receives the sample signal; the broadband receiving transducer is fixed on the sample acoustic testing platform; the signal emission and collection unit collects the sample signal; the upper computer obtains sample sound velocity data according to the sample signal and the sample length data; the sound velocity dispersion characteristic of the submarine sediment sample is researched without replacing transducers with different frequencies, so that the efficiency of testing the submarine sediment sample is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a system for measuring sound velocity of a sample of a marine sediment based on a broadband transducer according to the present invention.
Description of the symbols:
the device comprises an upper computer-1, a submarine sediment sample-2, a sample acoustic testing platform-3, a signal transmitting and collecting unit-4, a preamplifier-41, an analog-to-digital converter-42, a control board-43, a digital-to-analog converter-44, a multi-resonance-point transmitting transducer-5, a broadband receiving transducer-6, a power amplifier-7, an impedance matching-8, a power supply module-9 and a displacement sensor-10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a system for testing the sound velocity of a submarine sediment sample based on a broadband transducer, which improves the sound velocity testing efficiency of the submarine sediment sample.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the system for testing the sound velocity of a submarine sediment sample based on a broadband transducer is connected with an upper computer 1, and the upper computer 1 is used for outputting control signals for controlling and transmitting ultrasonic signals with different frequencies; a submarine sediment sample 2 is placed on a sample acoustic testing platform 3; the system for testing the sound velocity of the submarine sediment sample based on the broadband transducer comprises: the device comprises a displacement sensor 10, a signal transmitting and acquiring unit 4, a multi-resonance-point transmitting transducer 5 and a broadband receiving transducer 6.
The displacement sensor 10 is connected with the upper computer 1, the displacement sensor 10 is fixed on the sample acoustic testing platform 3, and the displacement sensor 10 is used for measuring the length of the submarine sediment sample 2 to obtain sample length data and sending the sample length data to the upper computer 1.
The signal emission and collection unit 4 is connected with the upper computer 1, and the signal emission and collection unit 4 is used for outputting sound source signals according to the control signals.
The multiple resonance point transmitting transducer 5 is connected with the signal transmitting and collecting unit 4, and the multiple resonance point transmitting transducer 5 is used for transmitting ultrasonic signals with corresponding frequencies according to sound source signals; the multi-resonance-point transmitting transducer 5 is fixed on the sample acoustic testing platform 3; the ultrasonic signal passes through the seabed sediment sample 2 to obtain a sample signal.
The broadband receiving transducer 6 is connected with the signal transmitting and collecting unit 4, and the broadband receiving transducer 6 is fixed on the sample acoustic testing platform 3; the broadband receiving transducer 6 is used for receiving the sample signal and sending the sample signal to the signal transmitting and collecting unit 4; the signal emission and collection unit 4 is also used for sending the collected sample signals to the upper computer 1, and the upper computer 1 is used for obtaining sample sound velocity data according to the sample length data and the sample signals.
Optionally, the displacement sensor 10 is connected to the upper computer 1 through a data line.
Preferably, the signal emission and acquisition unit 4 is connected with the upper computer 1 through a network cable. The emission and collection of ultrasonic signals are controlled through the upper computer 1, and previewing, analyzing, data storage and the like are carried out according to the tested sample signals and the tested length. In addition, the transmitting frequency of the signal is changed through the upper computer 1, the sound velocity frequency dispersion characteristic of the seabed sediment sample 2 is obtained, transducers with different frequencies do not need to be replaced, and the testing efficiency is greatly improved.
Optionally, the broadband receiving transducer 6 is connected with the signal emission and acquisition unit 4 through a bnc (BayonetNeill-Concelman, nit-Kang Saiman bayonet) cable. The bnc cable has the characteristics of firmness, durability and large current-carrying capacity.
The broadband receiving transducer 6 has the characteristic of high sensitivity, and can obtain signals with frequencies set by software of the upper computer 1 when receiving signals from the multi-resonance-point transmitting transducer 5, and suppress signals with other resonance frequencies.
Further, the signal emission and collection unit 4 includes: a preamplifier 41, an analog-to-digital converter 42, a control board 43 and a digital-to-analog converter 44.
The preamplifier 41 is connected to the broadband receiving transducer 6, and the preamplifier 41 is configured to amplify the sample signal to obtain an amplified sample signal.
The analog-to-digital converter 42 is connected to the preamplifier 41, and the analog-to-digital converter 42 is configured to perform analog-to-digital conversion on the amplified sample signal to obtain a sample signal in the form of a digital signal.
The control panel 43 is connected with the analog-to-digital converter 42 and the upper computer 1, and the control panel 43 is used for collecting the sample signals in the form of digital signals and sending the sample signals to the upper computer 1; the upper computer 1 is used for obtaining the sample sound velocity data according to the sample signal in the form of digital signal; the control board 43 is further configured to output an initial signal according to the control signal;
the digital-to-analog converter 44 is connected with the control board 43 and the multiple resonance point transmitting transducer 5, and the digital-to-analog converter 44 is configured to obtain a sound source signal according to the initial signal and send the sound source signal to the multiple resonance point transmitting transducer 5.
Preferably, the control board 43 is an FPGA (field programmable gate array) control board. The FPGA has the characteristics of flexible design, strong compatibility, parallel computation, convenient application and the like, and is internally provided with abundant input/output unit pins and triggers.
In addition, the broadband transducer-based seafloor sediment sample sound speed test system further comprises a power amplifier 7.
The power amplifier 7 is connected with the signal emission and collection unit 4 and the multi-resonance-point emission transducer 5, and the power amplifier 7 is used for improving the quality of sound source signals. The power amplifier 7 adopts a linear power amplifier 7, and has the advantages of small interference, good linearity, small distortion, high stability, wide frequency range and the like.
Because the multi-resonance-point transmitting transducer 5 is a piezoelectric ceramic transducer and a capacitive device, in order to effectively improve the excitation efficiency of a signal source on the multi-resonance-point transmitting transducer 5 and improve the amplitude and quality of ultrasonic signals emitted by the multi-resonance-point transmitting transducer 5, the submarine sediment sample sound velocity test system based on the broadband transducer further comprises an impedance matching 8.
Preferably, the impedance matching 8 is disposed between the power amplifier 7 and the multi-resonance point transmitting transducer 5, and the impedance matching 8 is used for matching an impedance network and pure resistance characteristics between the power amplifier 7 and the multi-resonance point transmitting transducer 5.
In order to reduce line losses, the power amplifier 7 is connected to the impedance matching 8 by means of a two-core power cable.
Preferably, the impedance match 8 is connected to the multiple resonance point transmitting transducer 5 by a bnc cable.
Preferably, the broadband transducer-based seafloor sediment sample sound speed testing system further comprises a power supply module 9.
The power module 9 is connected with the signal emission and collection unit 4 and the power amplifier 7, and the power module 9 is used for supplying power to the signal emission and collection unit 4 and the power amplifier 7.
The power module 9 is also provided with a power input interface for charging.
The invention also provides a device for testing the sound velocity of the submarine sediment sample based on the broadband transducer, which comprises the following components: the system comprises the system for testing the sound velocity of the submarine sediment sample based on the broadband transducer, a sample acoustic testing platform 3 and an upper computer 1.
The sample acoustic testing platform 3 is used for placing a submarine sediment sample 2; and the multi-resonance-point transmitting transducer 5 and the broadband receiving transducer 6 of the submarine sediment sample sound velocity testing system based on the broadband transducer are fixed on the sample acoustic testing platform.
The upper computer 1 is connected with a signal transmitting and collecting unit 4 of the sound velocity testing system of the submarine sediment sample based on the broadband transducer; the upper computer 1 is used for outputting a control signal to control the signal emission and collection unit 4 to output a sound source signal; the sound source signal is used for enabling the multi-resonance-point transmitting transducer 5 to transmit ultrasonic signals with corresponding frequencies, and the ultrasonic signals penetrate through the submarine sediment sample 2 to obtain sample signals; and the upper computer 1 obtains sample sound velocity data according to the sample signals collected by the signal emission and collection unit 4 and the sample length data measured by the displacement sensor 10.
Meanwhile, the power module 9 is also used for supplying power to the upper computer 1.
In the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While the principles and embodiments of this invention have been described in connection with specific examples thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The system for testing the sound velocity of the submarine sediment sample based on the broadband transducer is characterized in that the system for testing the sound velocity of the submarine sediment sample based on the broadband transducer is connected with an upper computer, and the upper computer is used for outputting control signals for controlling and transmitting ultrasonic signals with different frequencies; placing a seafloor sediment sample on a sample acoustic testing platform; the system for testing the sound velocity of the submarine sediment sample based on the broadband transducer comprises:
the displacement sensor is connected with the upper computer, fixed on the sample acoustic testing platform and used for measuring the length of the submarine sediment sample to obtain sample length data and sending the sample length data to the upper computer;
the signal transmitting and collecting unit is connected with the upper computer and used for outputting a sound source signal according to the control signal;
the multi-resonance-point transmitting transducer is connected with the signal transmitting and collecting unit and is used for transmitting ultrasonic signals with corresponding frequencies according to sound source signals; the multi-resonance-point transmitting transducer is fixed on the sample acoustic testing platform; the ultrasonic signal penetrates through the submarine sediment sample to obtain a sample signal;
the broadband receiving transducer is connected with the signal transmitting and collecting unit, is fixed on the sample acoustic testing platform and is used for receiving the sample signal and sending the sample signal to the signal transmitting and collecting unit; the signal emission and collection unit is also used for sending the collected sample signals to the upper computer, and the upper computer is used for obtaining sample sound velocity data according to the sample length data and the sample signals.
2. The broadband transducer based seafloor sediment sample sound speed testing system of claim 1, wherein the signal emission collection unit comprises:
the preamplifier is connected with the broadband receiving transducer and is used for amplifying the sample signal to obtain an amplified sample signal;
the analog-to-digital converter is connected with the preamplifier and is used for performing analog-to-digital conversion on the amplified sample signal to obtain a sample signal in a digital signal form;
the control panel is connected with the analog-to-digital converter and the upper computer and used for collecting the sample signals in the form of the digital signals and sending the sample signals to the upper computer; the upper computer is used for obtaining the sample sound velocity data according to the sample signal in the form of the digital signal; the control board is also used for outputting an initial signal according to the control signal;
and the digital-to-analog converter is connected with the control panel and the multi-resonance-point transmitting transducer and is used for obtaining a sound source signal according to the initial signal and sending the sound source signal to the multi-resonance-point transmitting transducer.
3. The broadband transducer based seafloor sediment sample sound speed testing system of claim 2, wherein the control board is an FPGA control board.
4. The broadband transducer-based seafloor sediment sample sonic testing system of claim 1, further comprising:
and the power amplifier is connected with the signal transmitting and collecting unit and the multi-resonance-point transmitting transducer and is used for improving the quality of the sound source signal.
5. The broadband transducer based seafloor sediment sample sound speed testing system of claim 4, further comprising:
and the impedance matching device is arranged between the power amplifier and the multi-resonance-point transmitting transducer and is used for matching an impedance network and pure resistance characteristics between the power amplifier and the multi-resonance-point transmitting transducer.
6. The broadband transducer based seafloor sediment sample sound speed testing system of claim 4, further comprising:
and the power supply module is connected with the signal transmitting and collecting unit and the power amplifier and used for supplying power to the signal transmitting and collecting unit and the power amplifier.
7. The wideband transducer based seafloor sediment sample sound speed testing system of claim 5, wherein the power amplifier is connected to the impedance match via a two-core power cable.
8. The wideband transducer based seafloor sediment sample acoustic speed testing system of claim 5, wherein the impedance match is connected to the multiple resonance point transmitting transducer by a bnc cable.
9. The system for testing the sound speed of a seafloor sediment sample based on the broadband transducer of claim 1, wherein the broadband receiving transducer is connected with the signal emission and collection unit through a bnc cable.
10. A broadband transducer-based seafloor sediment sample sound speed testing device is characterized by comprising:
the wideband transducer based seafloor sediment sample sound speed testing system of any one of claims 1-9;
the sample acoustic testing platform is used for placing a submarine sediment sample; the multi-resonance-point transmitting transducer and the broadband receiving transducer of the submarine sediment sample sound velocity testing system based on the broadband transducer are fixed on a sample acoustic testing platform;
the upper computer is connected with the signal transmitting and collecting unit of the sound velocity testing system of the submarine sediment sample based on the broadband transducer and is used for outputting a control signal to control the signal transmitting and collecting unit to output a sound source signal; the sound source signal is used for enabling the multi-resonance-point transmitting transducer to transmit ultrasonic signals with corresponding frequencies, and the ultrasonic signals penetrate through the seabed sediment sample to obtain sample signals; and the upper computer obtains sample sound velocity data according to the sample signals collected by the signal emission and collection unit and the sample length data measured by the displacement sensor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310020820.6A CN115839998A (en) | 2023-01-06 | 2023-01-06 | System and device for testing sound velocity of submarine sediment sample based on broadband transducer |
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| CN202310020820.6A CN115839998A (en) | 2023-01-06 | 2023-01-06 | System and device for testing sound velocity of submarine sediment sample based on broadband transducer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116519799A (en) * | 2023-07-03 | 2023-08-01 | 自然资源部第一海洋研究所 | Method, device and medium for correcting sound velocity value measured by sampling of wideband submarine sediment |
| CN116559290A (en) * | 2023-07-10 | 2023-08-08 | 自然资源部第二海洋研究所 | Small-scale submarine sediment in-situ acoustic measurement experimental device |
| CN116910473A (en) * | 2023-07-03 | 2023-10-20 | 中山大学 | Submarine sediment broadband sound velocity prediction method, computer device and storage medium |
-
2023
- 2023-01-06 CN CN202310020820.6A patent/CN115839998A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116519799A (en) * | 2023-07-03 | 2023-08-01 | 自然资源部第一海洋研究所 | Method, device and medium for correcting sound velocity value measured by sampling of wideband submarine sediment |
| CN116910473A (en) * | 2023-07-03 | 2023-10-20 | 中山大学 | Submarine sediment broadband sound velocity prediction method, computer device and storage medium |
| CN116519799B (en) * | 2023-07-03 | 2024-01-09 | 自然资源部第一海洋研究所 | Method, device and medium for correcting sound velocity value measured by sampling of wideband submarine sediment |
| CN116910473B (en) * | 2023-07-03 | 2024-01-19 | 中山大学 | Submarine sediment broadband sound velocity prediction method, computer device and storage medium |
| CN116559290A (en) * | 2023-07-10 | 2023-08-08 | 自然资源部第二海洋研究所 | Small-scale submarine sediment in-situ acoustic measurement experimental device |
| CN116559290B (en) * | 2023-07-10 | 2023-10-27 | 自然资源部第二海洋研究所 | Small-scale submarine sediment in-situ acoustic measurement experimental device |
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