An automatic detection method of dynamic modulus and poisson's ratio based on array ultrasonic

Abstract

The application discloses an automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasonic, and relates to the technical field of material detection.The application obtains multiple ultrasonic signals of a measured material through an array ultrasonic probe with integrated emission and reception, and then calculates ultrasonic longitudinal wave and surface wave speeds of the measured material, and further calculates the dynamic elastic modulus and Poisson's ratio of the measured material according to the longitudinal wave and surface wave speeds.The application has the advantages of non-destructiveness, high detection precision, high efficiency, high reliability and the like, and can realize accurate testing of the dynamic elastic modulus and Poisson's ratio of ceramic materials.

Description

Technical Field

[0001] The present invention relates to the technical field of material detection, and in particular to an automatic detection method for dynamic elastic modulus and Poisson's ratio based on array ultrasound. Background Art

[0002] In recent years, with the continuous expansion of the emerging ceramics industry, the development of efficient and accurate ceramic material evaluation methods that meet the needs of integrated ceramic material production and testing has become increasingly important. Dynamic modulus and Poisson's ratio are two important parameters that characterize the mechanical properties of ceramic materials. The dynamic modulus characterizes the ease with which a ceramic material undergoes elastic deformation; a larger value indicates greater stiffness, while the Poisson's ratio reflects the material's ability to deform laterally.

[0003] Currently, commonly used methods for testing the dynamic modulus of ceramics are divided into static and resonance methods. The static method requires applying bending stress to the ceramic material and calculating its dynamic modulus based on the stress-strain relationship. This method is destructive and has low accuracy. The resonance method obtains the dynamic modulus by measuring the fundamental frequency of the ceramic sample. This method is non-destructive, but it has high requirements for the ceramic sample size and is not suitable for testing plate-shaped ceramics with similar lateral dimensions.

[0004] Therefore, there is currently a lack of a universal and accurate non-destructive testing method for the dynamic elastic modulus and Poisson's ratio of ceramic materials of different specifications. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an automatic detection method for dynamic modulus and Poisson's ratio based on array ultrasound in response to the above-mentioned defects of the prior art, aiming to solve the problem in the prior art of the lack of a universal and accurate non-destructive testing method for dynamic modulus and Poisson's ratio.

[0006] The technical solutions adopted by the present invention to solve the problem are as follows:

[0007] In a first aspect, an embodiment of the present invention provides a method for automatically detecting dynamic elastic modulus and Poisson's ratio based on array ultrasound, the method comprising:

[0008] An array ultrasonic sensor is pre-placed on the material to be tested, wherein the array ultrasonic sensor includes a first transmitting probe, a second transmitting probe, and a movable receiving probe located between the first transmitting probe and the second transmitting probe;

[0009] Moving the receiving probe to an initial detection position between the first transmitting probe and the second transmitting probe, and receiving the signals transmitted by the first transmitting probe and the second transmitting probe respectively through the receiving probe to obtain a plurality of ultrasonic signals;

[0010] Using the first transmitting probe or the second transmitting probe as a target transmitting probe, sequentially adjusting the distance between the receiving probe and the target transmitting probe, and continuing to perform the step of receiving, by the receiving probe, the signals respectively transmitted by the first transmitting probe and the second transmitting probe to obtain a plurality of ultrasonic signals after each distance adjustment, until a preset adjustment requirement is met;

[0011] The longitudinal wave acoustic time data and the surface wave acoustic time data of the ultrasonic wave are calculated according to all the obtained ultrasonic signals, and the Poisson's ratio and the dynamic elastic modulus of the measured material are calculated according to the longitudinal wave acoustic time data and the surface wave acoustic time data.

[0012] In one embodiment, the receiving probe moves via a preset slide rail.

[0013] In one embodiment, the receiving, by the receiving probe, signals transmitted respectively by the first transmitting probe and the second transmitting probe includes:

[0014] Connecting the first transmitting probe to the transmitter separately, and receiving the signal transmitted by the first transmitting probe through the receiving probe;

[0015] The position of the receiving probe is kept unchanged, the second transmitting probe is connected to the transmitter separately, and the signal transmitted by the second transmitting probe is received by the receiving probe.

[0016] In one embodiment, the preset adjustment requirement includes:

[0017] The distance value between the receiving probe and the target transmitting probe is increased sequentially according to a preset distance unit until the distance value between the receiving probe and the target transmitting probe reaches a preset multiple of the distance unit.

[0018] In one embodiment, the calculating the Poisson's ratio and the dynamic elastic modulus of the material under test based on the longitudinal wave acoustic time data and the surface wave acoustic time data includes:

[0019] generating a first fitting straight line according to the longitudinal wave acoustic time data, and determining the longitudinal wave sound velocity according to the slope of the first fitting straight line, wherein the first fitting straight line is used to reflect the relationship between the distance value between the receiving probe and the target transmitting probe and the longitudinal wave acoustic time;

[0020] generating a second fitting straight line based on the surface wave acoustic time data, and determining the surface wave acoustic velocity based on the slope of the second fitting straight line, wherein the second fitting straight line is used to reflect the relationship between the distance value between the receiving probe and the target transmitting probe and the surface wave acoustic time;

[0021] The Poisson's ratio and the dynamic elastic modulus of the material being tested are calculated according to the longitudinal wave sound velocity and the surface wave sound velocity.

[0022] In one embodiment, the calculating the Poisson's ratio and the dynamic elastic modulus of the material under test according to the longitudinal wave velocity and the surface wave velocity includes:

[0023] Calculating the Poisson's ratio of the material under test according to the longitudinal wave velocity and the surface wave velocity;

[0024] The density value of the material to be measured is obtained, and the dynamic elastic modulus of the material to be measured is calculated according to the density value of the material to be measured, the Poisson's ratio and the longitudinal wave speed.

[0025] In one embodiment, the first transmitting probe, the second transmitting probe, and the receiving probe are located on the same straight line, and the method further includes:

[0026] One of the first transmitting probe and the second transmitting probe is used as a fixed transmitting probe, and the other is used as a mobile transmitting probe;

[0027] Keeping the position of the fixed transmitting probe unchanged, adjust the positions of the receiving probe and the mobile transmitting probe at the same time so that the angle formed by the intersection of the straight line where the three are located after adjustment and the straight line where the three are located at the beginning meets the preset angle;

[0028] Obtaining the Poisson's ratio and dynamic elastic modulus of the material being tested, respectively calculated when the preset angle takes different values;

[0029] The target Poisson's ratio is determined based on the average of all Poisson's ratios, and the target dynamic modulus is determined based on the average of all dynamic moduli.

[0030] In a second aspect, an embodiment of the present invention further provides an automatic detection system for dynamic elastic modulus and Poisson's ratio based on array ultrasound, the system comprising:

[0031] An array ultrasonic sensor is pre-installed on the material to be tested, and includes a first transmitting probe, a second transmitting probe, and a movable receiving probe located between the first transmitting probe and the second transmitting probe;

[0032] an acquisition module, configured to move the receiving probe to an initial detection position between the first transmitting probe and the second transmitting probe, and receive signals transmitted by the first transmitting probe and the second transmitting probe respectively through the receiving probe to obtain a plurality of ultrasonic signals;

[0033] an adjustment module, configured to use the first transmitting probe or the second transmitting probe as a target transmitting probe, sequentially adjust the distance between the receiving probe and the target transmitting probe, and continue to perform the step of receiving, by the receiving probe, the signals respectively transmitted by the first transmitting probe and the second transmitting probe to obtain a plurality of ultrasonic signals after each distance adjustment, until a preset adjustment requirement is met;

[0034] The calculation module is used to calculate the longitudinal wave acoustic time data and the surface wave acoustic time data of the ultrasonic wave according to all the obtained ultrasonic signals, and calculate the Poisson's ratio and the dynamic elastic modulus of the material under test according to the longitudinal wave acoustic time data and the surface wave acoustic time data.

[0035] In a third aspect, an embodiment of the present invention further provides a terminal comprising a memory and one or more processors; the memory stores one or more programs; the programs include instructions for executing any of the automatic detection methods for dynamic elastic modulus and Poisson's ratio based on array ultrasound as described above; and the processor is used to execute the programs.

[0036] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium on which a plurality of instructions are stored, wherein the instructions are suitable for being loaded and executed by a processor to implement the steps of the automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound as described in any of the above.

[0037] Beneficial Effects of the Present Invention: The present invention utilizes an array-type ultrasonic probe with integrated transmitter and receiver capabilities to acquire ultrasonic signals from the material under test, thereby calculating the ultrasonic longitudinal and surface wave velocities of the material under test. The dynamic modulus and Poisson's ratio of the material under test are then calculated based on these velocities. This present invention offers the advantages of non-destructive testing, high accuracy, high efficiency, and high reliability, enabling precise testing of the dynamic modulus and Poisson's ratio of ceramic materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 It is a flow chart of an automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound provided by an embodiment of the present invention.

[0040] Figure 2 Schematic diagram of the composition of an array ultrasonic sensor provided in an embodiment of the present invention.

[0041] Figure 3 It is a schematic diagram of the change of longitudinal wave and surface wave acoustic time of ceramic tiles with distance provided by an embodiment of the present invention.

[0042] Figure 4 Schematic diagram of the change of longitudinal wave and surface wave acoustic time of a glass plate with distance provided by an embodiment of the present invention.

[0043] Figure 5 4 is a schematic diagram of generating a maximum measurement range based on rotation provided by an embodiment of the present invention.

[0044] Figure 6 3 is a schematic diagram of a test scenario when the rotation angle is 0 degrees provided by an embodiment of the present invention.

[0045] Figure 7 3 is a schematic diagram of a test scenario when the rotation angle is 120 degrees provided by an embodiment of the present invention.

[0046] Figure 8 3 is a schematic diagram of a test scenario when the rotation angle is 240 degrees provided by an embodiment of the present invention.

[0047] Figure 9 1 is a schematic diagram of the change of the longitudinal wave and surface wave acoustic time of the tested object with distance when the rotation angle is 0 degrees provided by an embodiment of the present invention.

[0048] Figure 10 1 is a schematic diagram of the change of the longitudinal wave and surface wave acoustic time of the tested object with distance when the rotation angle is 120 degrees provided by an embodiment of the present invention.

[0049] Figure 11 1 is a schematic diagram of the change of the longitudinal wave and surface wave acoustic time of the tested object with distance when the rotation angle is 240 degrees provided by an embodiment of the present invention.

[0050] Figure 12 Schematic diagram of a module of an automatic detection system for dynamic elastic modulus and Poisson's ratio based on array ultrasound provided by an embodiment of the present invention.

[0051] Figure 13 This is a principle block diagram of a terminal provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0052] The present invention discloses an automatic detection method for dynamic elastic modulus and Poisson's ratio based on array ultrasound. To make the objectives, technical solutions, and effects of the present invention more clear and explicit, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are intended only to illustrate the present invention and are not intended to limit the present invention.

[0053] It will be understood by those skilled in the art that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the description of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, "connected" or "coupled" as used herein may include wireless connections or wireless couplings. The term "and / or" used herein includes all or any units and all combinations of one or more associated listed items.

[0054] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with their meanings in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0055] In response to the above-mentioned defects of the prior art, the present invention provides an automatic detection method for dynamic elastic modulus and Poisson's ratio based on array ultrasound. The method comprises pre-setting an array ultrasonic sensor on a material to be tested, wherein the array ultrasonic sensor includes a first transmitting probe, a second transmitting probe, and a movable receiving probe located between the first transmitting probe and the second transmitting probe; moving the receiving probe to an initial detection position between the first transmitting probe and the second transmitting probe, and receiving the signals respectively transmitted by the first transmitting probe and the second transmitting probe through the receiving probe to obtain a plurality of ultrasonic signals; using the first transmitting probe or the second transmitting probe as a target transmitting probe, sequentially adjusting the distance value between the receiving probe and the target transmitting probe, and continuing to receive the signals respectively transmitted by the first transmitting probe and the second transmitting probe through the receiving probe after each distance adjustment to obtain a plurality of ultrasonic signals until a preset adjustment requirement is met; calculating the longitudinal wave acoustic time data and the surface wave acoustic time data of the ultrasonic wave based on all the obtained ultrasonic signals, and calculating the Poisson's ratio and dynamic elastic modulus of the material to be tested based on the longitudinal wave acoustic time data and the surface wave acoustic time data. This method uses an array-type ultrasonic probe with integrated transmitter and receiver to acquire multiple ultrasonic signals from the material being tested. It then calculates the longitudinal and surface wave velocities of the ultrasonic material. The dynamic modulus and Poisson's ratio of the material are then calculated based on these velocities. This method offers the advantages of non-destructive testing, high accuracy, high efficiency, and high reliability, enabling precise testing of the dynamic modulus and Poisson's ratio of ceramic materials.

[0056] like Figure 1 As shown, the method specifically includes:

[0057] Step S100: pre-arrange an array ultrasonic sensor on a material to be tested, wherein the array ultrasonic sensor includes a first transmitting probe, a second transmitting probe, and a movable receiving probe located between the first transmitting probe and the second transmitting probe.

[0058] Specifically, an array sensor refers to a whole composed of one or more sensors arranged in a certain order, with certain functions and effects, and has the characteristics of strong coverage and high accuracy. The array ultrasonic sensor (array ultrasonic detection device) in this embodiment is constructed by an array ultrasonic probe with integrated transmission and reception, including two ultrasonic transmitting probes and a receiving probe located between the two transmitting probes. In actual use, the array ultrasonic probe is placed on the material to be tested, and the array ultrasonic probe obtains ultrasonic signals related to the material to be tested, which serves as the basic data for the subsequent calculation of the dynamic elastic modulus and Poisson's ratio.

[0059] In one implementation, the material to be tested may be ceramic.

[0060] In one implementation, the receiving probe moves via a preset slide rail.

[0061] Specifically, during actual construction, two ultrasonic transmitter probes are fixed to the ends of the array sensor bracket, and the receiver probe is fixed to the array ultrasonic probe. The array ultrasonic probe is mounted on a slide rail, and the receiver probe moves along the slide rail to achieve precise and adjustable movement distance. The array ultrasonic probe is then coupled to the material being measured. For example, the transmitter and receiver probes can be connected to the material being measured using a coupling agent, which can be chemical paste, water, mineral oil, or petroleum jelly, with petroleum jelly being preferred.

[0062] For example, Figure 2 As shown, a ceramic material is used as the material to be tested, and an array-type ultrasonic testing device with integrated transmission and reception is composed of a transmitting probe 0, a receiving probe 1, and a transmitting probe 2. The transmitting probe and the receiving probe are both arranged on a slide rail 7. The lead 3 of the transmitting probe 0 and the lead 5 of the transmitting probe 2 are both connected to the transmitter 11. The lead 4 of the receiving probe 1 is connected to the receiver 12, and the receiver 12 is connected to the computer 13. The transmitting probe 0 and the transmitting probe 2 are respectively fixed to the two ends of the slide rail 7 by sliders 8 and 10, and the other ends are connected to the ceramic material 6 to be tested. One end of the receiving probe 1 can be moved on the slide rail 7 by a slider 9, and the other end is connected to the ceramic material 6 to be tested.

[0063] In one implementation, the length of the slide rail is not less than 30 cm, preferably 40 cm.

[0064] Step S200: Move the receiving probe to an initial detection position between the first transmitting probe and the second transmitting probe, and receive the signals respectively transmitted by the first transmitting probe and the second transmitting probe through the receiving probe to obtain a plurality of ultrasonic signals.

[0065] Specifically, during the initial detection, the receiving probe is first moved to a designated position between the first and second transmitting probes. This designated position serves as the initial detection position. At the initial detection position, one of the first and second transmitting probes is controlled to transmit a signal, which is then received by the receiving probe. The other transmitting probe is then controlled to transmit a signal, which is then received by the receiving probe, resulting in multiple ultrasonic signals.

[0066] In one implementation, Figure 2 As shown, during the first test, the distance between the transmitting probe 0 or the transmitting probe 2 and the receiving probe 1 is not less than 2 cm.

[0067] In one implementation, the receiving, by the receiving probe, signals transmitted respectively by the first transmitting probe and the second transmitting probe includes:

[0068] Connecting the first transmitting probe to the transmitter separately, and receiving the signal transmitted by the first transmitting probe through the receiving probe;

[0069] The position of the receiving probe is kept unchanged, the second transmitting probe is connected to the transmitter separately, and the signal transmitted by the second transmitting probe is received by the receiving probe.

[0070] Specifically, first ensure that all components are in good working condition. Then, connect one of the transmitting probes to the transmitter, while the other transmitting probe is disconnected from the transmitter. The transmitter controls the connected transmitting probe to generate an ultrasonic signal, and an oscilloscope is used to record the ultrasonic signal from the receiving probe. Next, disconnect the transmitting probe from the transmitter, connect the other transmitting probe to the transmitter, and use the transmitter to control the connected transmitting probe to generate an ultrasonic signal. An oscilloscope is used to record the ultrasonic signal from the receiving probe.

[0071] In one implementation, signal lines of the first transmitting probe, the second transmitting probe, and the receiving probe are led out from the top of the probe.

[0072] Step S300: Use the first transmitting probe or the second transmitting probe as the target transmitting probe, and adjust the distance value between the receiving probe and the target transmitting probe in turn. After each adjustment of the distance value, continue to perform the step of receiving the signals respectively transmitted by the first transmitting probe and the second transmitting probe through the receiving probe to obtain a plurality of ultrasonic signals until the preset adjustment requirements are met.

[0073] Specifically, in this embodiment, the first transmitting probe or the second transmitting probe is used as the target transmitting probe, i.e., the distance variation reference object. By gradually adjusting the distance between the receiving probe and the target transmitting probe and performing ultrasonic signal testing, ultrasonic signals at different positions of the tested material can be obtained.

[0074] For example, Figure 2 As shown, the positions of transmitting probe 0 and transmitting probe 2 are fixed, and the distance that the receiving probe moves on the slide rail each time is not less than 1 cm and not more than 5 cm, preferably 2.5 cm. After each movement, a coupling agent is required to couple the receiving probe to the material to be tested (such as ceramic material). The receiving probe moves on the slide rail at least 10 times, preferably 12 times. The signal frequency range of the transmitting probe is 50-100kHz, the signal input voltage is not less than 100V, and the frequency range of the received signal is not less than 50-100kHz.

[0075] In one implementation, the preset adjustment requirement includes:

[0076] The distance value between the receiving probe and the target transmitting probe is increased sequentially according to a preset distance unit until the distance value between the receiving probe and the target transmitting probe reaches a preset multiple of the distance unit.

[0077] Specifically, after the receiving probe is placed at the initial detection position between the first transmitting probe and the second transmitting probe, the ultrasonic signal at the current position is collected, and then the distance between the receiving probe and the target transmitting probe is increased in an orderly manner according to a specific distance unit. After each movement of the receiving probe, the ultrasonic signal needs to be collected again. When the number of movements reaches a preset number, that is, the distance value between the receiving probe and the target transmitting probe is increased in an orderly manner until it reaches a preset multiple of the distance unit, the movement of the receiving probe is stopped. The array-type ultrasonic detection device with integrated transmission and reception of this embodiment not only simplifies the position arrangement of the ultrasonic wave in the ultrasonic probe and the complexity of the test steps, but also provides data diversity, which can reduce errors and further improve the accuracy of the ultrasonic detection results.

[0078] For example, take the tested material as ceramic tile and Figure 2 The following is a schematic diagram of the layout of the transmitting and receiving probes, illustrating the process of moving the receiving probe multiple times to obtain ultrasonic signals:

[0079] (1) Using a coupling agent to fix the transmitting probe to the tile, the coupling agent is chemical paste, water, mineral oil, or vaseline, preferably vaseline;

[0080] (2) Move the receiving probe to a distance L0 from the transmitting probe (2 cm ≤ L0 ≤ 5 cm), and then fix it to the tile with a coupling agent. Be careful to avoid air from forming on the contact surface between the receiving probe and the tile to avoid affecting the accuracy of the results.

[0081] (3) Using a transmitter to generate an ultrasonic signal for the transmitting probe, and using an oscilloscope to record the ultrasonic signal of the receiving probe;

[0082] (4) First, the transmitting probe 0 transmits the signal alone and the receiving probe 1 receives the ultrasonic signal. Then, the receiving probe 1 is kept in the same position, the lead 3 is disconnected and the lead 5 is connected, and then step (3) is repeated.

[0083] (5) Keep the position of the transmitting probe unchanged, increase the distance L0 based on step (2), and then repeat steps (3) and (4);

[0084] (6) Keep the transmitting probe in the same position and repeat step (5) until the distance between the receiving probe and the transmitting probe is not less than n×L0 (n≥8).

[0085] Step S400: Calculate the longitudinal wave acoustic time data and the surface wave acoustic time data of the ultrasonic wave according to all the obtained ultrasonic signals, and calculate the Poisson's ratio and the dynamic elastic modulus of the material under test according to the longitudinal wave acoustic time data and the surface wave acoustic time data.

[0086] Specifically, ultrasound has the advantages of high energy, strong penetrating power, and good directionality. The propagation speed of ultrasound is related to the density of the medium, the dynamic modulus, and the Poisson's ratio, and different types of ultrasound have different propagation speeds in the medium. This embodiment is based on the propagation characteristics of ultrasound and accurately obtains the propagation speed of different types of ultrasound to achieve non-destructive testing of the dynamic modulus and Poisson's ratio of the material being tested. In actual application scenarios, multiple ultrasonic signals of the material being tested are obtained by repeatedly adjusting the distance between the receiving probe and the target transmitting probe. The ultrasonic longitudinal wave acoustic time and surface wave acoustic time are calculated from all ultrasonic signals, and then the Poisson's ratio and dynamic modulus of the material being tested are calculated from the ultrasonic longitudinal wave acoustic time and surface wave acoustic time. This embodiment can achieve non-destructive testing and rapid detection of the Poisson's ratio and dynamic modulus of the material, and this embodiment does not have excessive requirements on the sample size (such as the sample width-to-thickness ratio) when testing the dynamic modulus, and can be applied to samples with similar lateral dimensions.

[0087] In one implementation, the calculating the Poisson's ratio and the dynamic elastic modulus of the material under test based on the longitudinal wave acoustic time data and the surface wave acoustic time data includes:

[0088] generating a first fitting straight line according to the longitudinal wave acoustic time data, and determining the longitudinal wave sound velocity according to the slope of the first fitting straight line, wherein the first fitting straight line is used to reflect the relationship between the distance value between the receiving probe and the target transmitting probe and the longitudinal wave acoustic time;

[0089] generating a second fitting straight line based on the surface wave acoustic time data, and determining the surface wave acoustic velocity based on the slope of the second fitting straight line, wherein the second fitting straight line is used to reflect the relationship between the distance value between the receiving probe and the target transmitting probe and the surface wave acoustic time;

[0090] The Poisson's ratio and the dynamic elastic modulus of the material being tested are calculated according to the longitudinal wave sound velocity and the surface wave sound velocity.

[0091] Specifically, the longitudinal wave acoustic time data includes multiple longitudinal wave acoustic times, each longitudinal wave acoustic time corresponds to a different distance value (i.e., the distance value between the receiving probe and the target transmitting probe), and each longitudinal wave acoustic time is calculated by the ultrasonic signal received by the receiving probe at a specific distance value. Similarly, the surface wave acoustic time data includes multiple surface wave acoustic times, each surface wave acoustic time corresponds to a different distance value (i.e., the distance value between the receiving probe and the target transmitting probe), and each surface wave acoustic time is calculated by the ultrasonic signal received by the receiving probe at a specific distance value. The longitudinal wave acoustic time data is fitted to obtain a straight line equation, i.e., the first fitting straight line; and the surface wave acoustic time data is fitted to obtain a straight line equation, i.e., the second fitting straight line. The longitudinal wave sound velocity can be determined by the first fitting straight line, and the surface wave sound velocity can be determined by the second fitting straight line. Finally, the Poisson's ratio and dynamic elastic modulus of the material under test are calculated by the longitudinal wave sound velocity and the surface wave sound velocity.

[0092] For example, taking ceramic tiles as the material to be measured, the generation process of the first fitting straight line and the second fitting straight line, as well as the calculation process of the longitudinal wave and surface wave sound speed are explained:

[0093] Continue with the above steps (1)-(6);

[0094] (7) Calculate the ultrasonic longitudinal wave time t according to the ultrasonic signal recorded by the receiving probe each time Li and surface wave acoustic time t Ri , (i=1, 2...n), and then according to the distance L between the receiving probe and the transmitting probe each time i (L i =i×L0), plot t Li and L i , t Ri and L i The fitting line, the slope of the fitting line k L , k R That is the longitudinal wave and surface wave speed of the tile.

[0095] In one implementation, calculating the Poisson's ratio and the dynamic elastic modulus of the material under test according to the longitudinal wave velocity and the surface wave velocity includes:

[0096] Calculating the Poisson's ratio of the material under test according to the longitudinal wave velocity and the surface wave velocity;

[0097] The density value of the material to be measured is obtained, and the dynamic elastic modulus of the material to be measured is calculated according to the density value of the material to be measured, the Poisson's ratio and the longitudinal wave speed.

[0098] Specifically, the Poisson's ratio of the material being tested is related to the longitudinal wave velocity and the surface wave velocity, while the dynamic modulus is related to the density value, Poisson's ratio, and longitudinal wave velocity of the material being tested. In actual application scenarios, after calculating the longitudinal wave velocity and surface wave velocity, the Poisson's ratio of the material being tested can be calculated based on these two data. Then, the density value of the material being tested is obtained. After calculating the Poisson's ratio, the dynamic modulus of the material being tested can be calculated based on the Poisson's ratio, density value, and longitudinal wave velocity.

[0099] For example, taking ceramic tiles as the material to be tested, the calculation process of Poisson's ratio and dynamic modulus is explained:

[0100] Continue with the above steps (1)-(7);

[0101] (8) According to k L , k R The Poisson's ratio σ of the tile is calculated as follows:

[0102]

[0103] (9) Test the density ρ of the tile, and then calculate the dynamic elastic modulus E of the tile based on kL and Poisson's ratio σ, as follows:

[0104]

[0105] Ceramic tiles are used as the tested materials, and Figure 2 The following is a schematic diagram of the layout of the transmitting and receiving probes, illustrating the overall process of Poisson's ratio and dynamic modulus:

[0106] The distance between the transmitting probe 0 and the transmitting probe 2 is fixed at 30 cm, and the receiving probe 1 is moved to a distance of 2.5 cm from the transmitting probe 0 by the slider 9 .

[0107] Vaseline is used as a coupling agent to couple and fix all probes to the tiles 6, a transmitter 11 is used to input a 100kHz, 150V square wave pulse signal to the transmitting probe 0, a receiver 12 is used to collect the ultrasonic signal from the receiving sensor 1, and the computer 13 stores the data.

[0108] Keeping the position between transmitting probe 0 and transmitting probe 2 unchanged, move receiving probe 1 to a distance of 5 cm from transmitting probe 0 using slider 9, and use receiver 12 to collect ultrasonic signals from receiving sensor 1, and store the data in computer 13. Keeping the position between transmitting probe 0 and transmitting probe 2 unchanged, repeat the above operation until the distance between receiving probe 1 and transmitting probe 0 is 7.5 cm, 10 cm, 12.5 cm, 15 cm, 17.5 cm, 20 cm, 22.5 cm, 25 cm, 27.5 cm, and 30 cm, respectively. Use receiver 12 to collect ultrasonic signals from receiving sensor 1, and store the data in computer 13.

[0109] Read the longitudinal wave and surface wave acoustic time of the tiles at different distances respectively, and draw the curve of the change of longitudinal wave and surface wave acoustic time and distance (such as Figure 3 As shown), the longitudinal wave k is obtained by linear fitting L and the surface wave speed k R They are 5348m / s and 2967m / s respectively, and then according to k L , k R The Poisson's ratio σ of the tile is calculated to be 0.207, and its dynamic elastic modulus is calculated to be 55.16 GPa based on the density ρ of the tile.

[0110] The glass plate is used as the material to be tested, and Figure 2 The following is a schematic diagram of the layout of the transmitting and receiving probes, illustrating the calculation process of Poisson's ratio and dynamic modulus:

[0111] The distance between the transmitting probe 0 and the transmitting probe 2 is fixed at 30 cm, and the receiving probe 1 is moved to a distance of 2.5 cm from the transmitting probe 0 by the slider 9 .

[0112] Vaseline is used as a coupling agent to couple and fix all probes to the glass plate 6. A transmitter 11 is used to input a 100kHz, 150V square wave pulse signal to the transmitting probe 0. A receiver 12 is used to collect the ultrasonic signal from the receiving sensor 1, and the data is stored by a computer 13.

[0113] Keeping the position between transmitting probe 0 and transmitting probe 2 unchanged, move receiving probe 1 to a distance of 5 cm from transmitting probe 0 using slider 9, and use receiver 12 to collect ultrasonic signals from receiving sensor 1, and store the data in computer 13. Keeping the position between transmitting probe 0 and transmitting probe 2 unchanged, repeat the above operation until the distance between receiving probe 1 and transmitting probe 0 is 7.5 cm, 10 cm, 12.5 cm, 15 cm, 17.5 cm, 20 cm, 22.5 cm, 25 cm, 27.5 cm, and 30 cm, respectively. Use receiver 12 to collect ultrasonic signals from receiving sensor 1, and store the data in computer 13.

[0114] Read the longitudinal wave and surface wave acoustic time of the glass plate at different distances respectively, and draw the curve of the change of longitudinal wave and surface wave acoustic time and distance (such as Figure 4 As shown), the longitudinal wave k is obtained by linear fitting L and the surface wave speed k R They are 5329.83m / s and 2961.98m / s respectively, and then according to k L , k R The Poisson's ratio σ of the tile is calculated to be 0.205, and the dynamic elastic modulus is obtained to be 63.45 GPa based on the density ρ of the glass plate.

[0115] In one implementation, the first transmitting probe, the second transmitting probe, and the receiving probe are located on the same straight line, and the method further includes:

[0116] One of the first transmitting probe and the second transmitting probe is used as a fixed transmitting probe, and the other is used as a mobile transmitting probe;

[0117] Keeping the position of the fixed transmitting probe unchanged, adjust the positions of the receiving probe and the mobile transmitting probe at the same time so that the angle formed by the intersection of the straight line where the three are located after adjustment and the straight line where the three are located at the beginning meets the preset angle;

[0118] Obtaining the Poisson's ratio and dynamic elastic modulus of the material being tested, respectively calculated when the preset angle takes different values;

[0119] The target Poisson's ratio is determined based on the average of all Poisson's ratios, and the target dynamic modulus is determined based on the average of all dynamic moduli.

[0120] Specifically, in order to further improve the data accuracy of Poisson's ratio and dynamic modulus, this embodiment will expand the measurement range to obtain the Poisson's ratio and dynamic modulus calculated multiple times within the maximum measurement range, and then improve the data reliability by averaging. In actual application, one of the first transmitting probe and the second transmitting probe is used as a fixed transmitting probe, and the other is used as a mobile transmitting probe. The straight line formed by the first transmitting probe, the second transmitting probe and the receiving probe is rotated to obtain the maximum measurement range (such as Figure 5 Then, the Poisson's ratio and the dynamic module are calculated when the straight line connecting the three is at different positions, and the target Poisson's ratio and the target dynamic module are obtained by taking the average value.

[0121] For example, take ceramic tiles as the tested material and Figure 5 The following diagram shows the layout of the transmitting and receiving probes, illustrating the process of calculating the target Poisson's ratio and target dynamic modulus based on the average value:

[0122] Continue with the above steps (1)-(9);

[0123] (10) Keep the transmitting probe 1 as the center point and rotate the ultrasonic sensor detection device counterclockwise to reach the target position for the desired measurement, preferably 0° (such as Figure 6 As shown), 120° (as shown Figure 7 As shown), 240° (as shown Figure 8 Then repeat the above experimental steps to obtain the dynamic elastic modulus E1, E2...E at different angles. n and Poisson's ratios σ1, σ2…σ n .

[0124] (11) Using polar coordinate axes, record polar coordinate points (ρ, θ) at different positions and obtain data.

[0125] (12) The dynamic elastic modulus E and Poisson's ratio σ obtained from experiments on the same tile at different angles are averaged as follows:

[0126]

[0127] Ceramic tiles are used as the tested materials, and Figure 5 The following is a schematic diagram of the arrangement and rotation of the transmitting and receiving probes, illustrating the overall process of moving the receiving probe multiple times to obtain ultrasonic signals and calculating the target Poisson's ratio and target dynamic modulus based on the average value:

[0128] The distance between the transmitting probe 1 and the transmitting probe 3 is fixed at 30 cm, and the receiving probe 2 is moved to a distance of 2.5 cm from the transmitting probe 1 by a slider.

[0129] Vaseline is used as a coupling agent to couple and fix all probes to the sample under test. A transmitter 9 is used to input a 100kHz, 150V square wave pulse signal to the transmitting probe 1. A receiver 10 is used to collect the ultrasonic signal from the receiving sensor 2, and the computer 11 stores the data.

[0130] Maintaining the position between transmitting probe 1 and transmitting probe 3, move receiving probe 2 to a distance of 5 cm from transmitting probe 1 using the slider. Use receiver 10 to collect ultrasonic signals from receiving sensor 2, and computer 11 stores the data. Maintaining the position between transmitting probe 1 and transmitting probe 3, repeat the above steps until the distance between receiving probe 2 and transmitting probe 1 is 7.5 cm, 10 cm, 12.5 cm, 15 cm, 17.5 cm, 20 cm, 22.5 cm, 25 cm, 27.5 cm, and 30 cm, respectively. Use receiver 10 to collect ultrasonic signals from receiving sensor 2, and computer 11 stores the data. First, complete the above steps at the original position, repeat the above steps to obtain and save the data.

[0131] Read the longitudinal wave and surface wave acoustic time of the tiles at different distances respectively, and draw the curve of the change of longitudinal wave and surface wave acoustic time and distance when the rotation angle is 0 degrees (such as Figure 9 As shown), the longitudinal wave k is obtained by linear fitting L and the surface wave speed k R They are 5586m / s and 3110m / s respectively, and then according to k L , k R The Poisson's ratio σ1 of the tile is calculated to be 0.203, and its dynamic elastic modulus E1 is calculated to be 66.5 GPa based on the density ρ of the tile.

[0132] Further, the transmitting probe 1 is kept in the same position and rotated 120 degrees counterclockwise with the slide rail 4 as the radius (such as Figure 7 Repeat the above steps to obtain the data and save it.

[0133] Read the longitudinal wave and surface wave acoustic time of the tiles at different distances respectively, and draw the curve of the change of longitudinal wave and surface wave acoustic time and distance when the rotation angle is 120° (such as Figure 10 As shown), the longitudinal wave k is obtained by linear fitting L and the surface wave speed k R They are 5509m / s and 3069m / s respectively, and then according to k L , k R The Poisson's ratio σ2 of the tile is calculated to be 0.205, and its dynamic elastic modulus E2 is calculated to be 67.5 GPa based on the density ρ of the tile.

[0134] Further, the transmitting probe 1 is kept in the same position and rotated counterclockwise by 240° with the slide rail 4 as the radius (eg Figure 8 Repeat the above steps to obtain the data and save it.

[0135] Read the longitudinal wave and surface wave acoustic time of the tiles at different distances respectively, and draw the curve of the change of longitudinal wave and surface wave acoustic time and distance when the total rotation angle is 240° (such as Figure 11 As shown), the longitudinal wave k is obtained by linear fitting L and the surface wave speed k R They are 5494m / s and 3059m / s respectively, and then according to k L , k R The Poisson's ratio σ3 of the tile is calculated to be 0.203, and its dynamic elastic modulus E3 is calculated to be 66.7 GPa based on the density ρ of the tile.

[0136] By taking the average of the measured data, the dynamic elastic modulus and Poisson's ratio of the ceramic can be accurately measured to be 66.9 GPa and 0.204 respectively:

[0137]

[0138] In summary, the advantages of the present invention are:

[0139] 1. The present invention can non-destructively test the dynamic elastic modulus and Poisson's ratio of ceramic materials without destroying the ceramic products, which can save a lot of costs, especially for current large slate products.

[0140] 2. The present invention can quickly, efficiently and non-destructively test the dynamic modulus and Poisson's ratio of ceramic materials by testing and collecting the longitudinal wave and surface wave sound velocities, and can realize online detection of ceramic products, thereby improving test efficiency and ensuring product quality.

[0141] 3. The present invention provides a new method for non-destructive testing of the dynamic elastic modulus and Poisson's ratio of ceramic materials, which promotes the innovation of ceramic material testing technology and has very important practical significance.

[0142] 4. The ultrasonic nondestructive testing technology of this invention plays a vital role in controlling and improving product quality, ensuring the reliability of materials, parts, and products, ensuring the safe operation of equipment, improving production efficiency, and reducing costs. It is an essential and important technical means for the development of modern industry and science and technology. Furthermore, ultrasonic nondestructive testing technology can promptly detect defects that arise during the production process, thereby improving product quality and reliability.

[0143] Based on the above embodiments, the present invention also provides an automatic detection system for dynamic elastic modulus and Poisson's ratio based on array ultrasound, such as Figure 12 As shown, the system includes:

[0144] The array ultrasonic sensor 01 is pre-installed on the material to be tested and includes a first transmitting probe, a second transmitting probe, and a movable receiving probe located between the first transmitting probe and the second transmitting probe;

[0145] Acquisition module 02, configured to move the receiving probe to an initial detection position between the first transmitting probe and the second transmitting probe, and receive signals transmitted by the first transmitting probe and the second transmitting probe respectively through the receiving probe to obtain a plurality of ultrasonic signals;

[0146] an adjustment module 03 configured to sequentially adjust the distance between the receiving probe and the target transmitting probe, using the first transmitting probe or the second transmitting probe as a target transmitting probe, and continuing to perform the step of receiving, by the receiving probe, the signals transmitted by the first transmitting probe and the second transmitting probe, respectively, to obtain a plurality of ultrasonic signals after each distance adjustment, until a preset adjustment requirement is met;

[0147] The calculation module 04 is used to calculate the longitudinal wave acoustic time data and the surface wave acoustic time data of the ultrasonic wave according to all the obtained ultrasonic signals, and calculate the Poisson's ratio and the dynamic elastic modulus of the material under test according to the longitudinal wave acoustic time data and the surface wave acoustic time data.

[0148] Based on the above embodiment, the present invention further provides a terminal, whose principle block diagram can be shown as follows: Figure 13 As shown. The terminal includes a processor, a memory, a network interface, and a display screen connected via a system bus. The processor of the terminal is used to provide computing and control capabilities. The memory of the terminal includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the terminal is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, an automatic detection method for dynamic elastic modulus and Poisson's ratio based on array ultrasound is implemented. The display screen of the terminal can be a liquid crystal display or an electronic ink display.

[0149] Those skilled in the art will understand that Figure 13 The principle block diagram shown in the figure is only a block diagram of a partial structure related to the solution of the present invention, and does not constitute a limitation on the terminal to which the solution of the present invention is applied. The specific terminal may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0150] In one implementation, the terminal has one or more programs stored in its memory and is configured to be executed by one or more processors. The one or more programs include instructions for performing an automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound.

[0151] Those skilled in the art will appreciate that all or part of the processes in the above-described embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When executed, the computer program can include the processes of the above-described embodiments. Among them, any reference to memory, storage, database or other media used in the embodiments provided by the present invention can include non-volatile and / or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM) or flash memory. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), RAMbus direct RAM (RDRAM), direct RAM bus dynamic RAM (DRDRAM), and RAMbus dynamic RAM (RDRAM).

[0152] In summary, the present invention discloses an automatic detection method for dynamic elastic modulus and Poisson's ratio based on array ultrasound, which relates to the field of material detection technology. The method comprises: pre-setting an array ultrasonic sensor on a material to be tested, wherein the array ultrasonic sensor includes a first transmitting probe, a second transmitting probe, and a movable receiving probe located between the first transmitting probe and the second transmitting probe; moving the receiving probe to an initial detection position between the first transmitting probe and the second transmitting probe, receiving signals respectively transmitted by the first transmitting probe and the second transmitting probe through the receiving probe, and obtaining a plurality of ultrasonic signals; using the first transmitting probe or the second transmitting probe as a target transmitting probe, sequentially adjusting the distance value between the receiving probe and the target transmitting probe, and continuing to perform the step of receiving signals respectively transmitted by the first transmitting probe and the second transmitting probe through the receiving probe after each distance adjustment to obtain a plurality of ultrasonic signals until a preset adjustment requirement is met; calculating longitudinal wave acoustic time data and surface wave acoustic time data of the ultrasonic wave based on all the obtained ultrasonic signals, and calculating the Poisson's ratio and dynamic elastic modulus of the material to be tested based on the longitudinal wave acoustic time data and the surface wave acoustic time data. This method uses an array-type ultrasonic probe with integrated transmitter and receiver to acquire multiple ultrasonic signals from the material being tested. It then calculates the longitudinal and surface wave velocities of the ultrasonic material. The dynamic modulus and Poisson's ratio of the material are then calculated based on these velocities. This method offers the advantages of non-destructive testing, high accuracy, high efficiency, and high reliability, enabling precise testing of the dynamic modulus and Poisson's ratio of ceramic materials.

[0153] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. An automatic detection method for dynamic elastic modulus and Poisson's ratio based on array ultrasound, characterized in that: The method comprises: An array ultrasonic sensor is pre-placed on the material to be tested, wherein the array ultrasonic sensor includes a first transmitting probe, a second transmitting probe, and a movable receiving probe located between the first transmitting probe and the second transmitting probe; The receiving probe is moved to an initial detection position between the first transmitting probe and the second transmitting probe, and the signals transmitted by the first transmitting probe and the second transmitting probe are received by the receiving probe to obtain a plurality of ultrasonic signals, including: connecting the first transmitting probe to the transmitter separately, and receiving the signal transmitted by the first transmitting probe by the receiving probe; keeping the position of the receiving probe unchanged, connecting the second transmitting probe to the transmitter separately, and receiving the signal transmitted by the second transmitting probe by the receiving probe; Using the first transmitting probe or the second transmitting probe as a target transmitting probe, sequentially adjusting the distance between the receiving probe and the target transmitting probe, and continuing to perform the step of receiving, by the receiving probe, the signals respectively transmitted by the first transmitting probe and the second transmitting probe to obtain a plurality of ultrasonic signals after each distance adjustment, until a preset adjustment requirement is met; The method comprises: generating a first fitting straight line according to the longitudinal wave acoustic time data and the surface wave acoustic time data of the ultrasonic wave, and determining the longitudinal wave sound velocity according to the slope of the first fitting straight line, wherein the first fitting straight line is used to reflect the relationship between the distance value between the receiving probe and the target transmitting probe and the longitudinal wave acoustic time; generating a second fitting straight line according to the surface wave acoustic time data, and determining the surface wave sound velocity according to the slope of the second fitting straight line, wherein the second fitting straight line is used to reflect the relationship between the distance value between the receiving probe and the target transmitting probe and the surface wave acoustic time; and calculating the Poisson's ratio and the dynamic elastic modulus of the material under test according to the longitudinal wave sound velocity and the surface wave sound velocity.

2. The automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound according to claim 1, characterized in that: The receiving probe moves via a preset slide rail.

3. The automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound according to claim 1, characterized in that: The preset adjustment requirements include: The distance value between the receiving probe and the target transmitting probe is increased sequentially according to a preset distance unit until the distance value between the receiving probe and the target transmitting probe reaches a preset multiple of the distance unit.

4. The automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound according to claim 1, characterized in that: Calculating the Poisson's ratio and the dynamic elastic modulus of the material under test according to the longitudinal wave velocity and the surface wave velocity includes: Calculating the Poisson's ratio of the material under test according to the longitudinal wave velocity and the surface wave velocity; The density value of the material to be measured is obtained, and the dynamic elastic modulus of the material to be measured is calculated according to the density value of the material to be measured, the Poisson's ratio and the longitudinal wave speed.

5. The automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound according to claim 1, characterized in that: The first transmitting probe, the second transmitting probe, and the receiving probe are located on the same straight line, and the method further includes: One of the first transmitting probe and the second transmitting probe is used as a fixed transmitting probe, and the other is used as a mobile transmitting probe; Keeping the position of the fixed transmitting probe unchanged, adjust the positions of the receiving probe and the mobile transmitting probe at the same time so that the angle formed by the intersection of the straight line where the three are located after adjustment and the straight line where the three are located at the beginning meets the preset angle; Obtaining the Poisson's ratio and dynamic elastic modulus of the material being tested, respectively calculated when the preset angle takes different values; The target Poisson's ratio is determined based on the average of all Poisson's ratios, and the target dynamic modulus is determined based on the average of all dynamic moduli.

6. An automatic detection system for dynamic elastic modulus and Poisson's ratio based on array ultrasound, characterized in that: The system comprises: An array ultrasonic sensor is pre-installed on the material to be tested, and includes a first transmitting probe, a second transmitting probe, and a movable receiving probe located between the first transmitting probe and the second transmitting probe; an acquisition module, configured to move the receiving probe to an initial detection position between the first transmitting probe and the second transmitting probe, and receive signals transmitted by the first transmitting probe and the second transmitting probe respectively through the receiving probe to obtain a plurality of ultrasonic signals, including: separately connecting the first transmitting probe to the transmitter and receiving the signal transmitted by the first transmitting probe through the receiving probe; maintaining the position of the receiving probe unchanged, separately connecting the second transmitting probe to the transmitter and receiving the signal transmitted by the second transmitting probe through the receiving probe; an adjustment module, configured to use the first transmitting probe or the second transmitting probe as a target transmitting probe, sequentially adjust the distance between the receiving probe and the target transmitting probe, and continue to perform the step of receiving, by the receiving probe, the signals respectively transmitted by the first transmitting probe and the second transmitting probe to obtain a plurality of ultrasonic signals after each distance adjustment, until a preset adjustment requirement is met; A calculation module is used to calculate the longitudinal wave acoustic time data and surface wave acoustic time data of the ultrasonic wave based on all the obtained ultrasonic signals, and calculate the Poisson's ratio and dynamic elastic modulus of the material under test based on the longitudinal wave acoustic time data and the surface wave acoustic time data, including: generating a first fitting straight line based on the longitudinal wave acoustic time data, and determining the longitudinal wave sound velocity based on the slope of the first fitting straight line, wherein the first fitting straight line is used to reflect the changing relationship between the distance value between the receiving probe and the target transmitting probe and the longitudinal wave acoustic time; generating a second fitting straight line based on the surface wave acoustic time data, and determining the surface wave sound velocity based on the slope of the second fitting straight line, wherein the second fitting straight line is used to reflect the changing relationship between the distance value between the receiving probe and the target transmitting probe and the surface wave acoustic time; and calculating the Poisson's ratio and dynamic elastic modulus of the material under test based on the longitudinal wave sound velocity and the surface wave sound velocity.

7. A terminal, characterized in that: The terminal includes a memory and one or more processors; the memory stores one or more programs; the program contains instructions for executing the automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound as described in any one of claims 1-5; the processor is used to execute the program.

8. A computer-readable storage medium having a plurality of instructions stored thereon, characterized in that: The instructions are suitable for being loaded and executed by a processor to implement the steps of the automatic detection method of dynamic elastic modulus and Poisson's ratio based on array ultrasound as described in any one of claims 1 to 5 above.

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