Sound velocity and sound attenuation coefficient measuring device and method

Abstract

The present invention belongs to the technical field of ultrasonic sound velocity and sound attenuation measurement, and provides a sound velocity and sound attenuation coefficient measurement device and method, the device includes a constant temperature water tank, a transmitting transducer and a receiving transducer fixed at a certain distance in the constant temperature water tank and immersed in distilled water, a container for sealing and containing the sample to be tested, and a water temperature detector immersed in distilled water; it also includes a pulse signal generator arranged outside the constant temperature water tank, and a signal processing and display module electrically connected to the receiving transducer and the water temperature detector respectively, and the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the sample to be tested are obtained by calculation and processing according to the signal processing and display module, and the sound velocity and sound attenuation coefficient are displayed on the display interface. The device of the present invention can measure the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in liquid or gel-like materials, and has the advantages of simple structure and high measurement accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic sound velocity and sound attenuation measurement, and in particular relates to a sound velocity and sound attenuation coefficient measurement device and method. Background Art

[0002] There are many applications for obtaining some non-acoustic information in the medium by using the propagation characteristics of ultrasound in the medium, such as sound velocity, sound attenuation, and sound impedance. For example, the sound velocity of ultrasound is widely used in many fields such as accurate detection of water content in crude oil, non-invasive pressure detection, and slurry concentration detection. However, the existing methods of measuring the sound velocity and sound attenuation of ultrasound in the medium of the sample under test using optical methods and ordinary insertion substitution methods have problems such as complex measurement methods and inaccurate measurement results. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a device and method for measuring sound velocity and sound attenuation coefficient to solve the problem that the existing methods of measuring ultrasonic sound velocity and sound attenuation in the sample medium using optical methods, ordinary insertion substitution methods, etc. have complex measurement methods and inaccurate measurement results.

[0004] In a first aspect, the present invention provides a device for measuring the speed of sound and the acoustic attenuation coefficient, comprising a constant temperature water tank filled with a certain amount of distilled water, a transmitting transducer and a receiving transducer fixed in the constant temperature water tank at a certain distance and immersed in the distilled water, a container inserted between the transmitting transducer and the receiving transducer and used for sealing and containing the sample to be measured, and a water temperature detector immersed in the distilled water; further comprising a pulse signal generator arranged outside the constant temperature water tank and electrically connected to the transmitting transducer, and a signal processing and display module arranged outside the constant temperature water tank and electrically connected to the receiving transducer and the water temperature detector respectively;

[0005] The transmitting transducer is used to generate an ultrasonic signal and transmit the ultrasonic signal in distilled water; the receiving transducer is used to receive the ultrasonic signal and convert the ultrasonic signal into an electrical signal; the water temperature detector is used to measure the temperature of the distilled water in the constant temperature water tank; the pulse signal generator is used to generate an electrical pulse to stimulate the transmitting transducer to generate an ultrasonic signal;

[0006] The signal processing and display module includes a signal processing unit and a display unit. The signal processing unit is used to obtain the temperature data measured by the water temperature detector, convert the electrical signal obtained from the receiving transducer into a corresponding pulse signal, and calculate and process the pulse signal to obtain the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the measured sample. The display unit is used to display the sound velocity and sound attenuation coefficient on a display interface.

[0007] Furthermore, the container is a cylindrical container made of acrylic material, and the two end faces of the cylindrical container that are perpendicular to the sound beam axis in the plane wave sound field formed by the ultrasonic signal are sealed with a film with high sound transparency; the sample to be tested is a liquid or gel material.

[0008] Furthermore, the signal processing and display module also includes a storage unit, which is used to pre-store a first correspondence table between the sound velocity and temperature of the distilled water in the constant temperature water tank, and a second correspondence table between the sound attenuation coefficient and the temperature; according to the temperature of the distilled water, the sound velocity and the sound attenuation coefficient of the ultrasonic signal propagating in the distilled water can be found in the first correspondence table and the second correspondence table respectively.

[0009] Furthermore, the signal processing and display module is also used to calculate and obtain the change in ultrasonic signal propagation time caused by inserting the container containing the sample to be tested.

[0010] Furthermore, in the signal processing and display module, the sound velocity calculation formula used to calculate and process the pulse signal to obtain the sound velocity of the ultrasonic signal propagating in the measured sample is as follows:

[0011]

[0012] Where c is the sound velocity of the ultrasonic signal propagating in the sample under test at the current temperature, in meters per second;

[0013] c w is the speed of sound of the ultrasonic signal propagating in distilled water at the current temperature, in meters per second;

[0014] d is the thickness of a single container containing the sample to be tested, in meters;

[0015] t is the change in ultrasonic signal propagation time caused by insertion into the container containing the sample to be tested, in seconds.

[0016] Furthermore, in the signal processing and display module, the acoustic attenuation coefficient calculation formula used to obtain the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample by performing calculation processing based on the pulse signal is as follows:

[0017]

[0018] Wherein, α is the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample at the current temperature, in decibels per centimeter;

[0019] α w is the acoustic attenuation coefficient of ultrasonic signals propagating in distilled water at the current temperature, in decibels per centimeter;

[0020] d1 The thickness of the container that holds the sample being tested and is thicker, in centimeters;

[0021] d s The thickness of the container that holds the sample being tested and has a smaller thickness, in centimeters;

[0022] A 1 The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and having a large thickness is inserted, in volts;

[0023] A s The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and having a small thickness is inserted, in volts.

[0024] The present invention also provides a method for measuring the sound velocity and the sound attenuation coefficient according to the above-mentioned sound velocity and sound attenuation coefficient measuring device, comprising:

[0025] S1, generating an electrical pulse by the pulse signal generator and sending it to the transmitting transducer;

[0026] S2, generating an ultrasonic signal after receiving the electric pulse through the transmitting transducer, and transmitting the ultrasonic signal in distilled water to form a plane wave acoustic field;

[0027] S3, receiving the ultrasonic signal through the receiving transducer, and converting the ultrasonic signal into an electrical signal;

[0028] S4, receiving the electrical signal through the signal processing and display module, converting the electrical signal into a corresponding pulse signal, and performing calculation processing according to the pulse signal to obtain the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the measured sample;

[0029] S5. Displaying the sound velocity and the sound attenuation coefficient on a display interface through the signal processing and display module.

[0030] Furthermore, before step S1, the method further includes:

[0031] S101, pre-storing a first correspondence table between the sound velocity and temperature of the distilled water in the constant temperature water tank and a second correspondence table between the sound attenuation coefficient and the temperature in the signal processing and display module; the sound velocity and the sound attenuation coefficient of the ultrasonic signal propagating in the distilled water can be found in the first correspondence table and the second correspondence table according to the temperature of the distilled water;

[0032] Before step S4, the method further includes:

[0033] S401, calculating and obtaining, through the signal processing and display module, the change in ultrasonic signal propagation time caused by inserting a container containing a sample to be tested.

[0034] Furthermore, in step S4, the sound velocity calculation formula used for calculating the sound velocity of the ultrasonic signal propagating in the sample under test by performing calculation processing based on the pulse signal is as follows:

[0035]

[0036] Where c is the sound velocity of the ultrasonic signal propagating in the sample under test at the current temperature, in meters per second;

[0037] c w is the speed of sound of the ultrasonic signal propagating in distilled water at the current temperature, in meters per second;

[0038] d is the thickness of a single container containing the sample to be tested, in meters;

[0039] t is the change in ultrasonic signal propagation time caused by insertion into the container containing the sample to be tested, in seconds.

[0040] Furthermore, in step S4, the acoustic attenuation coefficient calculation formula used in the acoustic attenuation coefficient of the ultrasonic signal propagating in the sample under test is obtained by calculating and processing the pulse signal as follows:

[0041]

[0042] Wherein, α is the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample at the current temperature, in decibels per centimeter;

[0043] α w is the acoustic attenuation coefficient of ultrasonic signals propagating in distilled water at the current temperature, in decibels per centimeter;

[0044] d 1 The thickness of the container that holds the sample being tested and is thicker, in centimeters;

[0045] d s The thickness of the container that holds the sample being tested and has a smaller thickness, in centimeters;

[0046] A 1 The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and having a large thickness is inserted, in volts;

[0047] A s The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and having a small thickness is inserted, in volts.

[0048] The present invention solves the problem that the measurement of ultrasonic sound velocity and sound attenuation in the sample medium in the prior art has a complex measurement method and inaccurate measurement results. The device of the present invention can measure the sound velocity and sound attenuation coefficient of ultrasonic signals propagating in liquid or gel materials, and has the advantages of simple structure and high measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0050] Figure 1 It is an overall schematic diagram of an embodiment of a device for measuring sound velocity and sound attenuation coefficient provided by the present invention;

[0051] Figure 2 It is a flow chart of an embodiment of a method for measuring sound velocity and sound attenuation coefficient provided by the present invention. DETAILED DESCRIPTION

[0052] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0053] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0054] like Figure 1 As shown, Figure 1 The figure is an overall schematic diagram of an embodiment of the sound velocity and sound attenuation coefficient measuring device provided by the present invention, which comprises a constant temperature water tank filled with a certain amount of distilled water, a transmitting transducer and a receiving transducer fixed in the constant temperature water tank at a certain distance and immersed in the distilled water, a container inserted between the transmitting transducer and the receiving transducer and used to seal and contain the sample to be measured, and a water temperature sensor immersed in the distilled water. It also comprises a pulse signal generator arranged outside the constant temperature water tank and electrically connected to the transmitting transducer, and a signal processing and display module arranged outside the constant temperature water tank and electrically connected to the receiving transducer and the water temperature sensor respectively.

[0055] The transmitting transducer is used to generate ultrasonic signals and transmit the ultrasonic signals in distilled water. The receiving transducer is used to receive ultrasonic signals, convert the ultrasonic signals into electrical signals and send the electrical signals to the signal processing and display module. The water temperature sensor is used to measure the temperature of the distilled water in the constant temperature water tank. The pulse signal generator is used to generate electrical pulses to excite the transmitting transducer to generate ultrasonic signals.

[0056] The signal processing and display module includes a signal processing unit and a display unit. The signal processing unit is used to obtain the temperature data measured by the water temperature sensor, convert the electrical signal obtained from the receiving transducer into a corresponding pulse signal, and calculate and process the pulse signal to obtain the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the measured sample. The display unit is used to display the sound velocity and sound attenuation coefficient on a display interface. Optionally, the signal processing and display module is a computer with a display screen.

[0057] Specifically, the container is a cylindrical container made of acrylic material, and the two end faces of the cylindrical container that are perpendicular to the sound beam axis in the plane wave sound field formed by the ultrasonic signal are sealed with a film with high sound permeability. The present invention uses an acrylic container to hold the sample to be tested, which can effectively avoid the attenuation and reflection of the ultrasonic signal by the container. The sample to be tested is a liquid or gel-like material. The device of the present invention can measure the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the liquid or gel-like material, and has the advantages of simple structure and high measurement accuracy.

[0058] Furthermore, the signal processing and display module also includes a storage unit, which is used to pre-store a first correspondence table between the sound velocity and temperature of the distilled water in the constant temperature water tank, and a second correspondence table between the sound attenuation coefficient and the temperature. According to the temperature of the distilled water, the sound velocity and the sound attenuation coefficient of the ultrasonic signal propagating in the distilled water can be found in the first correspondence table and the second correspondence table, respectively. Specifically, through the built-in relationship table of the sound velocity and temperature of the distilled water, and the sound attenuation and temperature of the distilled water, the sound velocity and the sound attenuation coefficient corresponding to the ultrasonic signal at a certain temperature in the distilled water can be automatically obtained by detecting the water temperature and looking up the table.

[0059] Furthermore, the signal processing and display module is also used to calculate and obtain the change in ultrasonic signal propagation time caused by inserting the container containing the sample to be tested. In specific implementation, the signal processing and display module can record the corresponding pulse signals before and after the insertion of the sample to be tested, compare the pulse signal waveforms, and by tracking the nth wave peak emitted by the transmitting transducer, record the time from the emission to the reception of the nth wave peak before the insertion of the sample to be tested, and record the time from the emission to the reception of the nth wave peak after the insertion of the sample to be tested. The latter minus the former is used to obtain the value corresponding to the change in ultrasonic signal propagation time, and a negative value is taken when the time is shortened, and a positive value is taken when the time is extended.

[0060] Furthermore, in the signal processing and display module, the sound velocity calculation formula used to calculate the sound velocity of the ultrasonic signal propagating in the measured sample is as follows:

[0061]

[0062] Wherein, c is the sound velocity of the ultrasonic signal propagating in the measured sample at the current temperature, in meters per second.

[0063] c w is the speed of sound of the ultrasonic signal propagating in distilled water at the current temperature, in meters per second.

[0064] d is the thickness of a single container containing the sample being tested, in meters.

[0065] t is the change in ultrasonic signal propagation time caused by insertion into the container containing the sample to be tested, in seconds.

[0066] The device of the present invention can quickly calculate the sound velocity of the ultrasonic signal propagating in the measured sample at the current temperature through the above formula.

[0067] Furthermore, in the signal processing and display module, the acoustic attenuation coefficient calculation formula used to calculate and process the pulse signal to obtain the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample is as follows:

[0068]

[0069] Wherein, α is the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample at the current temperature, in decibels per centimeter.

[0070] α w is the acoustic attenuation coefficient of ultrasonic signals propagating in distilled water at the current temperature, in decibels per centimeter.

[0071] d 1 The thickness of the container that holds the sample being tested and is thicker, in centimeters.

[0072] d s The thickness of the container that holds the sample being tested and has a smaller thickness, measured in centimeters.

[0073] A 1 It is the amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and with a large thickness is inserted, in volts.

[0074] A s The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and with a small thickness is inserted, in volts.

[0075] The device of the present invention can quickly calculate the sound velocity of the ultrasonic signal propagating in the measured sample at the current temperature through the above formula.

[0076] In summary, the sound velocity and sound attenuation coefficient measurement provided by the present invention includes a constant temperature water tank, a transmitting transducer and a receiving transducer fixed at a certain distance in the constant temperature water tank and immersed in distilled water, a container for sealing and containing the sample to be tested, and a water temperature sensor immersed in distilled water. It also includes a pulse signal generator arranged outside the constant temperature water tank, and a signal processing and display module electrically connected to the receiving transducer and the water temperature sensor respectively. The sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the sample to be tested are obtained according to the calculation and processing of the signal processing and display module, and the sound velocity and sound attenuation coefficient are displayed on the display interface. The device of the present invention can measure the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in liquid or gel-like materials, and has the advantages of simple structure and high measurement accuracy.

[0077] Furthermore, if Figure 2 As shown, the present invention also provides a method for measuring the sound velocity and the sound attenuation coefficient according to the above-mentioned sound velocity and the sound attenuation coefficient measuring device, comprising:

[0078] S1. Generate an electrical pulse through a pulse signal generator and send it to the transmitting transducer.

[0079] S2. After receiving the electric pulse, the transmitting transducer generates an ultrasonic signal, transmits the ultrasonic signal in distilled water and forms a plane wave acoustic field.

[0080] S3. Receive the ultrasonic signal through the receiving transducer, convert the ultrasonic signal into an electrical signal and send the electrical signal to the signal processing and display module.

[0081] S4. Receive the electrical signal through the signal processing and display module, convert the electrical signal into a corresponding pulse signal, and calculate and process the pulse signal to obtain the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the measured sample.

[0082] S5. Display the sound velocity and the sound attenuation coefficient on the display interface through the signal processing and display module.

[0083] Furthermore, in the embodiment of the method of the present invention, before step S1, the following steps are included:

[0084] S101, pre-store a first correspondence table of the sound velocity and temperature of distilled water in a constant temperature water tank, and a second correspondence table of the sound attenuation coefficient and temperature in the signal processing and display module. According to the temperature of the distilled water, the sound velocity and the sound attenuation coefficient of the ultrasonic signal propagating in the distilled water can be found in the first correspondence table and the second correspondence table respectively.

[0085] In the embodiment of the method of the present invention, before step S4, the method further includes:

[0086] S401. Calculate and obtain, through a signal processing and display module, a change in ultrasonic signal propagation time caused by inserting a container containing a sample to be tested.

[0087] Furthermore, when the method of the present invention is specifically implemented, in step S4, the sound velocity calculation formula used to calculate the sound velocity of the ultrasonic signal propagating in the sample under test is as follows:

[0088]

[0089] Wherein, c is the sound velocity of the ultrasonic signal propagating in the measured sample at the current temperature, in meters per second.

[0090] c w is the speed of sound of the ultrasonic signal propagating in distilled water at the current temperature, in meters per second.

[0091] d is the thickness of a single container containing the sample being tested, in meters.

[0092] t is the change in ultrasonic signal propagation time caused by insertion into the container containing the sample to be tested, in seconds.

[0093] Furthermore, in the specific implementation, in step S4, the acoustic attenuation coefficient calculation formula used to calculate the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample is as follows:

[0094]

[0095] Wherein, α is the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample at the current temperature, in decibels per centimeter.

[0096] α w is the acoustic attenuation coefficient of ultrasonic signals propagating in distilled water at the current temperature, in decibels per centimeter.

[0097] d 1 The thickness of the container that holds the sample being tested and is thicker, in centimeters.

[0098] d s The thickness of the container that holds the sample being tested and has a smaller thickness, measured in centimeters.

[0099] A 1 It is the amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and with a large thickness is inserted, in volts.

[0100] A sThe amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and with a small thickness is inserted, in volts.

[0101] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the method described above can refer to the corresponding process in the aforementioned device embodiment, and will not be repeated here.

[0102] In summary, the sound velocity and sound attenuation coefficient measurement method of the present invention can measure the sound velocity and sound attenuation coefficient of an ultrasonic signal propagating in a liquid or gel-like material with high measurement accuracy.

[0103] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A device for measuring sound velocity and sound attenuation coefficient, It is characterized in that It includes a constant temperature water tank filled with a certain amount of distilled water, a transmitting transducer and a receiving transducer fixed in the constant temperature water tank at a certain distance and immersed in the distilled water, a container inserted between the transmitting transducer and the receiving transducer and used to seal and contain the sample to be tested, and a water temperature detector immersed in the distilled water; it also includes a pulse signal generator arranged outside the constant temperature water tank and electrically connected to the transmitting transducer, and a signal processing and display module arranged outside the constant temperature water tank and electrically connected to the receiving transducer and the water temperature detector respectively; The transmitting transducer is used to generate an ultrasonic signal and transmit the ultrasonic signal in distilled water; the receiving transducer is used to receive the ultrasonic signal and convert the ultrasonic signal into an electrical signal; the water temperature detector is used to measure the temperature of the distilled water in the constant temperature water tank; the pulse signal generator is used to generate an electrical pulse to stimulate the transmitting transducer to generate an ultrasonic signal; The signal processing and display module includes a signal processing unit and a display unit. The signal processing unit is used to record the temperature data measured by the water temperature detector, convert the electrical signal obtained from the receiving transducer into a corresponding pulse signal, and calculate and process the pulse signal to obtain the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the measured sample. The display unit is used to display the sound velocity and sound attenuation coefficient on a display interface.

2. The device for measuring the sound velocity and sound attenuation coefficient as claimed in claim 1, It is characterized in that The container for holding the sample to be tested is a cylindrical container made of acrylic material, and the two end faces of the cylindrical container that are perpendicular to the sound beam axis in the plane wave sound field formed by the ultrasonic signal are sealed with a film with high sound transmission performance; the sample to be tested is a liquid or gel material.

3. The device for measuring the sound velocity and sound attenuation coefficient as claimed in claim 1, It is characterized in that The signal processing and display module also includes a storage unit, which is used to pre-store a first correspondence table between the sound velocity and temperature of the distilled water in the constant temperature water tank, and a second correspondence table between the sound attenuation coefficient and the temperature; according to the temperature of the distilled water, the sound velocity and the sound attenuation coefficient of the ultrasonic signal propagating in the distilled water can be found in the first correspondence table and the second correspondence table respectively.

4. The device for measuring the sound velocity and sound attenuation coefficient as claimed in claim 3, It is characterized in that The signal processing and display module is also used to calculate and obtain the change in ultrasonic signal propagation time caused by inserting the container containing the sample to be tested.

5. The device for measuring the sound velocity and sound attenuation coefficient as claimed in claim 4, It is characterized in that In the signal processing and display module, the sound velocity calculation formula used to calculate and process the pulse signal to obtain the sound velocity of the ultrasonic signal propagating in the measured sample is as follows: Where c is the sound velocity of the ultrasonic signal propagating in the sample under test at the current temperature, in meters per second; c w is the speed of sound of the ultrasonic signal propagating in distilled water at the current temperature, in meters per second; d is the thickness of a single container containing the sample to be tested, in meters; t is the change in ultrasonic signal propagation time caused by insertion into the container containing the sample to be tested, in seconds.

6. The device for measuring the sound velocity and sound attenuation coefficient as claimed in claim 4, It is characterized in that In the signal processing and display module, the acoustic attenuation coefficient calculation formula used to obtain the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample by calculating and processing the pulse signal is as follows: Wherein, α is the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample at the current temperature, in decibels per centimeter; α w is the acoustic attenuation coefficient of ultrasonic signals propagating in distilled water at the current temperature, in decibels per centimeter; d 1 is the thickness of the first container, in centimeters, wherein the first container is used to hold the sample to be tested; d s is the thickness of the second container, in centimeters, wherein the second container is used to hold the sample to be tested, and the thickness of the first container is greater than the thickness of the second container; A 1 The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and having a large thickness is inserted, in volts; A s The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and having a small thickness is inserted, in volts.

7. A method for measuring sound velocity and sound attenuation coefficient using the sound velocity and sound attenuation coefficient measuring device according to any one of claims 1 to 6, It is characterized in that include: S1, generating an electrical pulse by the pulse signal generator and sending it to the transmitting transducer; S2, generating an ultrasonic signal by the electric pulse received by the transmitting transducer, and transmitting the ultrasonic signal in distilled water to form a plane wave acoustic field; S3, receiving the ultrasonic signal through the receiving transducer, and converting the ultrasonic signal into an electrical signal; S4, receiving the electrical signal through the signal processing and display module, converting the electrical signal into a corresponding pulse signal, and performing calculation processing according to the pulse signal to obtain the sound velocity and sound attenuation coefficient of the ultrasonic signal propagating in the measured sample; S5. Displaying the sound velocity and the sound attenuation coefficient on a display interface through the signal processing and display module.

8. According to the method for measuring the sound velocity and the sound attenuation coefficient of claim 7, It is characterized in that Before step S1, the method includes: S101, pre-storing a first correspondence table between the sound velocity and temperature of the distilled water in the constant temperature water tank and a second correspondence table between the sound attenuation coefficient and the temperature in the signal processing and display module; the sound velocity and the sound attenuation coefficient of the ultrasonic signal propagating in the distilled water can be found in the first correspondence table and the second correspondence table according to the temperature of the distilled water; Before step S4, the method further includes: S401, calculating and obtaining, through the signal processing and display module, the change in ultrasonic signal propagation time caused by inserting a container containing a sample to be tested.

9. The method for measuring the sound velocity and the sound attenuation coefficient according to claim 8, It is characterized in that In step S4, the sound velocity calculation formula used for calculating the sound velocity of the ultrasonic signal propagating in the sample under test by performing calculation processing based on the pulse signal is as follows: Where c is the sound velocity of the ultrasonic signal propagating in the sample under test at the current temperature, in meters per second; c w is the speed of sound of the ultrasonic signal propagating in distilled water at the current temperature, in meters per second; d is the thickness of a single container containing the sample to be tested, in meters; t is the change in ultrasonic signal propagation time caused by insertion into the container containing the sample to be tested, in seconds.

10. The method for measuring the sound velocity and the sound attenuation coefficient as claimed in claim 8, It is characterized in that In step S4, the acoustic attenuation coefficient calculation formula used in the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample is obtained by calculating and processing the pulse signal as follows: Wherein, α is the acoustic attenuation coefficient of the ultrasonic signal propagating in the measured sample at the current temperature, in decibels per centimeter; α w is the acoustic attenuation coefficient of ultrasonic signals propagating in distilled water at the current temperature, in decibels per centimeter; d 1 is the thickness of the first container, in centimeters, wherein the first container is used to hold the sample to be tested; d s is the thickness of the second container, in centimeters, wherein the second container is used to hold the sample to be tested, and the thickness of the first container is greater than the thickness of the second container; A 1 The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and having a large thickness is inserted, in volts; A s The amplitude of the electrical signal received by the signal processing and display module after the container containing the sample to be tested and having a small thickness is inserted, in volts.

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