Ultrasonic probe transverse wave polarization direction determination method and device

Abstract

The invention discloses a method and a device for determining the transverse wave polarization direction of an ultrasonic probe. The method comprises the following steps: manufacturing an HTI physical model medium; determining the angle of the acoustic probe relative to the position of the HTI physical model medium when the maximum amplitude transverse wave vibration signal of the HTI physical model medium is acquired; the acoustic probe is fixed according to the angle, the HTI physical model medium is rotated, transverse wave vibration signals of the HTI physical model medium at different angles are collected, and the transverse wave polarization direction is determined according to the transverse wave vibration signals. Based on the combination of the fast and slow shear wave theory and the actual physical model, the experimental operation is simple and convenient, the shear wave polarization direction of the ultrasonic probe can be simply and efficiently determined, the data display result is stable, the accuracy and reliability of ultrasonic detection are improved, and the problems that the determination effect of the polarization direction of the shear wave sensor in rock physical acoustic testing is poor and the test time is short are solved. And effective verification of the transverse wave polarization direction effect difference cannot be carried out.

Description

Technical Field

[0001] The present invention belongs to the technical field of ultrasonic detection, and more specifically, relates to a method and device for determining the polarization direction of a transverse wave of an ultrasonic probe. Background Art

[0002] The shear wave sensor in the acoustic probe can be used to excite and receive shear waves and is an important component in the rock physics acoustic test device. The rock acoustic test system mainly places two acoustic probes on the two end faces of the rock sample. With the help of the high-voltage electrical signal generated by the pulse generator, the shear wave sensor in the probe performs acoustic-electric conversion and generates a transient vibration. The vibration propagates at a certain speed in the rock and is received by the acoustic probe at the other end. With the help of preamplification and digitization, the time and signal amplitude of the vibration passing through the rock sample are recorded. In this acoustic test process, the propagation direction of the shear wave is perpendicular to the vibration direction of the particle. The consistency of the shear wave polarization direction of the acoustic probe at the excitation end and the receiving end affects the signal quality. The clamping angle between the shear wave polarization direction in the acoustic probe and the sample will affect the time it takes for the vibration to pass through the rock sample. The detection and calibration of the shear wave polarization direction of the acoustic probe can greatly improve the quality of the shear wave test signal in the acoustic test, and can also provide data support for the anisotropic characteristic test of the sample at a specific angle to the polarization direction. To this end, it is necessary to detect and calibrate the shear wave polarization direction of the acoustic probe.

[0003] In ultrasonic testing, the polarization direction of the shear wave has an important influence on the accuracy of the test results. However, the existing polarization direction determination method is mainly based on complex equipment, and the test data results show that it does not have good directivity, and no evaluation is carried out from the actual application effect, which ultimately affects the accuracy and reliability of the shear wave velocity of the actual core ultrasonic test.

[0004] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to propose a method and device for determining the shear wave polarization direction of an ultrasonic probe, so as to achieve simple and efficient determination of the shear wave polarization direction of the ultrasonic probe, and solve the problem that the polarization direction determination effect of the shear wave sensor in rock physics acoustic testing is poor and the difference in the shear wave polarization direction effect cannot be effectively verified.

[0006] To achieve the above object, the present invention proposes a method and device for determining the polarization direction of the transverse wave of an ultrasonic probe.

[0007] According to a first aspect of the present invention, a method for determining the polarization direction of a shear wave of an ultrasonic probe is proposed, comprising:

[0008] Make HTI physical model medium;

[0009] Determining the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the shear wave vibration signal of the maximum amplitude of the HTI physical model medium;

[0010] The acoustic probe is fixed at the angle, the HTI physical model medium is rotated, the shear wave vibration signals of the HTI physical model medium at different angles are collected, and the shear wave polarization direction is determined according to the shear wave vibration signals.

[0011] Optionally, the HTI medium physical model is a cylindrical or rectangular sample in which samples of different materials are evenly distributed.

[0012] Optionally, the determining of the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the maximum amplitude shear wave vibration signal of the HTI physical model medium specifically includes:

[0013] Placing the acoustic probe in the HTI physical model medium and ensuring good contact between the two;

[0014] Rotating the acoustic probe to contact the HTI physical model medium at different angles;

[0015] Recording the shear wave vibration signal collected by the acoustic probe each time it rotates;

[0016] The angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the shear wave vibration signal of the maximum amplitude of the HTI physical model medium is determined according to all the shear wave vibration signals.

[0017] Optionally, the acoustic probe is fixed at the angle, the HTI physical model medium is rotated at a fixed angle, the shear wave vibration signal of the HTI physical model medium collected by the acoustic probe after each rotation of the HTI physical model medium is recorded, all the shear wave vibration signals are analyzed to determine the shear wave polarization direction.

[0018] Optionally, there are two acoustic probes.

[0019] Optionally, the shear wave vibration signal includes:

[0020] Amplitude and phase.

[0021] Optionally, the HTI medium physical model is provided with partitions to divide cylindrical or rectangular samples, and the partitions are aluminum sheets.

[0022] Optionally, the thickness of the interlayer is 1 mm.

[0023] Optionally, the acoustic probe has a built-in shear wave sensor.

[0024] According to a second aspect of the present invention, a device for determining the polarization direction of a transverse wave of an ultrasonic probe is provided, comprising:

[0025] A production module, used to produce HTI physical model media;

[0026] A first determination module is used to determine the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the shear wave vibration signal of the maximum amplitude of the HTI physical model medium;

[0027] The second determination module is used to fix the acoustic probe at the angle, rotate the HTI physical model medium, collect shear wave vibration signals of the HTI physical model medium at different angles, and determine the shear wave polarization direction according to the shear wave vibration signals.

[0028] The beneficial effects of the present invention are as follows: the present invention rotates an acoustic probe with a shear wave sensor to determine the angle of the acoustic probe relative to the HTI physical model medium when the acoustic probe collects the shear wave vibration signal of the maximum amplitude of the HTI physical model medium, fixes the acoustic probe at this angle, rotates the HTI physical model medium according to the fixed angle step, records the shear wave vibration signals of the acoustic probe at different angles, analyzes the amplitude and phase of the shear wave waveform at different angles, and determines the shear wave polarization direction of the probe; the present invention is based on the combination of fast and slow shear wave theory and actual physical models, and the experimental operation is simple and convenient, and the shear wave polarization direction of the ultrasonic probe can be determined simply and efficiently. The data display results are stable, the accuracy and reliability of ultrasonic detection are improved, and the problem that the polarization direction determination effect of the shear wave sensor in rock physics acoustic testing is poor and the difference in the shear wave polarization direction effect cannot be effectively verified is solved.

[0029] The system of the present invention has other characteristics and advantages, which will be apparent from the drawings incorporated herein and the following detailed description, or will be described in detail in the drawings incorporated herein and the following detailed description, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, in which like reference numerals generally represent like components.

[0031] Figure 1 A flow chart showing the steps of a method for determining the polarization direction of a shear wave of an ultrasonic probe according to the present invention.

[0032] Figure 2A flow chart showing the steps of a method for determining the polarization direction of a shear wave of an ultrasonic probe according to Embodiment 1 of the present invention.

[0033] Figure 3 A schematic structural diagram of the HTI medium physical model according to Embodiment 2 of the present invention is shown.

[0034] Figure 4 A schematic diagram showing an actual fabricated object of the HTI medium physical model according to Example 2 of the present invention is shown.

[0035] Figure 5 A schematic diagram of a test device for a method for determining the polarization direction of a transverse wave of an ultrasonic probe according to Embodiment 2 of the present invention is shown.

[0036] Figure 6 A schematic diagram of shear wave data of a method for determining shear wave polarization direction of an ultrasonic probe according to embodiment 2 of the present invention is shown.

[0037] Figure 7 A schematic diagram of a device for determining the shear wave polarization direction of an ultrasonic probe according to Embodiment 3 of the present invention is shown. DETAILED DESCRIPTION

[0038] The present invention will be described in more detail below with reference to the accompanying drawings. Although preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0039] like Figure 1 As shown, a method for determining the polarization direction of a transverse wave of an ultrasonic probe according to the present invention comprises:

[0040] Make HTI physical model medium;

[0041] Determine the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the maximum amplitude shear wave vibration signal of the HTI physical model medium;

[0042] The acoustic probe is fixed at an angle, the HTI physical model medium is rotated, the shear wave vibration signals of the HTI physical model medium at different angles are collected, and the shear wave polarization direction is determined according to the shear wave vibration signals.

[0043] Specifically, a HTI physical model medium is first prepared, and then the HTI physical model medium is placed between two acoustic transducers, the acoustic transducers are respectively placed at the upper and lower ends of the HTI physical model medium, and two acoustic probes are respectively set at the upper and lower ends of the HTI physical model medium, and ensure that the contact between the two is good; an acoustic wave generator is used to emit sound waves to the HTI physical model medium, and one of the acoustic probes is rotated to contact the HTI physical model medium at different angles, and a shear wave vibration signal collected by the acoustic probe is obtained through a sound wave detection device, and the shear wave vibration signal collected by the acoustic probe after each rotation is recorded. The shear wave vibration signal includes amplitude and phase information, and the amplitude and phase changes of the vibration signals at different angles are compared to find out the angle of the maximum amplitude of the shear wave vibration signal collected by the upper and lower acoustic probes relative to the position of the HTI physical model medium; the acoustic probe is fixed at this angle, and then the HTI physical model medium is rotated at a fixed angle, such as 10 degrees each time, and the shear wave vibration signal collected by the acoustic probe after each rotation is recorded, and all shear wave vibration signals are analyzed. According to the changes in amplitude and phase in the shear wave vibration signal, the shear wave polarization direction can be determined.

[0044] In one example, the HTI medium physical model is a cylindrical or rectangular parallelepiped sample in which samples of different materials are evenly distributed.

[0045] Specifically, a plurality of samples of different materials are combined together at equal intervals through a plurality of spacers to form a cylindrical or rectangular parallelepiped sample, and the cylindrical or rectangular parallelepiped sample is a HTI medium physical model.

[0046] In one example, determining the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the maximum amplitude shear wave vibration signal of the HTI physical model medium specifically includes:

[0047] Place the acoustic probe in the HTI physical model medium and ensure good contact between the two;

[0048] Rotate the acoustic probe so that it contacts the HTI physical model medium at different angles;

[0049] Record the shear wave vibration signal collected by the acoustic probe each time it rotates;

[0050] The angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the shear wave vibration signal of the maximum amplitude of the HTI physical model medium is determined according to all the shear wave vibration signals.

[0051] Specifically, two acoustic probes are placed in the HTI physical model medium, and it is ensured that each acoustic probe is in good contact with the HTI physical model medium. The position of one of the acoustic probes is fixed, and the other acoustic probe is rotated to contact the HTI physical model medium at different angles. The shear wave vibration signal of the HTI physical model medium after each rotation is collected by the acoustic probe and recorded. The shear wave vibration signal with the largest amplitude is determined based on all the recorded shear wave vibration signals, and then the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting this shear wave vibration signal is determined.

[0052] In one example, the acoustic probe is fixed at an angle, the HTI physical model medium is rotated at a fixed angle, the shear wave vibration signal of the HTI physical model medium collected by the acoustic probe after each rotation of the HTI physical model medium is recorded, all the shear wave vibration signals are analyzed, and the shear wave polarization direction is determined.

[0053] Specifically, after determining the angle of the acoustic probe with the shear wave vibration signal of the largest amplitude relative to the HTI physical model medium, the acoustic probe is fixed to the HTI physical model medium at this angle, and then the HTI physical model medium is rotated at a fixed angle until it rotates 360 degrees, for example, 20 degrees each time, and the shear wave vibration signal of the HTI physical model medium after each rotation is collected, all shear wave vibration signals are analyzed, and the changes in amplitude and phase of the HTI physical model medium during the rotation process are determined based on the amplitude and phase information in the shear wave vibration signal, thereby determining the shear wave polarization direction.

[0054] In one example, the number of acoustic probes is two.

[0055] In one example, the shear wave vibration signal includes:

[0056] Amplitude and phase.

[0057] In one example, a partition is provided inside the HTI medium physical model to divide a cylindrical or rectangular sample, and the partition is an aluminum sheet.

[0058] In one example, the spacer is 1 mm thick.

[0059] In one example, the acoustic probe has a built-in shear wave sensor.

[0060] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but is not intended to be limiting of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention may be combined with each other without conflict.

[0061] Example 1

[0062] like Figure 2As shown, this embodiment provides a method for determining the polarization direction of a transverse wave of an ultrasound probe, comprising:

[0063] Step 1: Prepare artificial samples of HTI media and prepare the test apparatus for pulse transmission method experiments

[0064] Prepare equipment: Get a pair of acoustic probes with shear wave sensors, and prepare an HTI physical model medium and an acoustic wave detection device. The HTI medium physical model is a cylindrical or rectangular sample with samples of different materials distributed at equal intervals.

[0065] Step 2: Determine the relative position where the excitation and receiving acoustic probe waveform signal has the strongest energy

[0066] Experimental test: Place the acoustic probe in the HTI physical model medium and ensure good contact between the two.

[0067] Rotating Probe: Manually rotate the acoustic probe to contact the HTI physical model medium at different angles.

[0068] Recording data: After each rotation, the shear wave vibration signal of the acoustic probe is recorded, including amplitude and phase information.

[0069] Analyze data: Compare the amplitude and phase changes of vibration signals at different angles. Find the angles of the maximum amplitude relative to the upper and lower acoustic probes.

[0070] Step 3: Fix the relative position of the acoustic probe, rotate the artificially prepared sample, record and analyze the shear wave waveform, and determine the shear wave polarization orientation.

[0071] Rotate the HTI physical model medium: rotate the HTI physical model medium at a fixed angle, for example, 10 degrees each time.

[0072] Repeated data recording: After each rotation, the lateral vibration signal of the HTI physical model medium is recorded;

[0073] Data processing: All collected transverse vibration signals are analyzed, and the transverse wave polarization direction can be determined based on the changes in amplitude and phase.

[0074] Example 2

[0075] This embodiment provides a method for determining the polarization direction of a shear wave of an ultrasound probe, including:

[0076] The artificial samples of HTI medium used in the experiment were prepared, which were mainly made by 3D printing. The interlayers with different properties were mainly composed of aluminum sheets with a thickness of 1 mm. The schematic diagram of the HTI medium physical model structure is shown in the figure. Figure 3 As shown, the actual preparation object is as Figure 4Prepare a pair of acoustic probes with shear wave sensors and a corresponding pulse transmission method acoustic test device. Place the artificial sample between the two acoustic transducers, as shown in Figure 5 shown.

[0077] First, fix the position of the artificial rock sample and one end of the probe, rotate the position of the other end of the probe, and record the shear wave vibration signal of the acoustic probe at different angles, including amplitude and phase information. According to the maximum amplitude information of the shear wave, determine the angle as the relative position where the polarization azimuths of the upper and lower probes are consistent.

[0078] Next, according to the relative position determined above, the relative position of the acoustic probe is fixed, the artificially prepared sample is rotated, the shear wave waveform is recorded and analyzed, and the shear wave polarization orientation is determined. Figure 6 The shear wave data rotated by 0°, 45°, 90°, and 135° respectively show that the waveform of this HTI medium has obvious differences in phase and amplitude at different azimuth angles. Among them, 45° and 135° are 180° flipped, and their amplitude and phase have good consistency, which also verifies the reliability of this physical model medium. Through the analysis of the first arrival and amplitude of the waveform at 0°, 45°, and 90°, it can be known that in this experiment, the position of the 0° angle is near the fast shear wave azimuth, and the position of the 90° angle is near the slow shear wave azimuth. In order to improve the accuracy, the HTI medium artificial core can be rotated at a denser angle to determine the shear wave polarization direction of the acoustic probe.

[0079] Example 3

[0080] like Figure 7 As shown, this embodiment provides a device for determining the polarization direction of a transverse wave of an ultrasonic probe, comprising:

[0081] A production module, used to produce HTI physical model media;

[0082] A first determination module is used to determine the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the shear wave vibration signal of the maximum amplitude of the HTI physical model medium;

[0083] The second determination module is used to fix the acoustic probe according to the angle, rotate the HTI physical model medium, collect the shear wave vibration signals of the HTI physical model medium at different angles, and determine the shear wave polarization direction according to the shear wave vibration signals.

[0084] Example 4

[0085] This embodiment provides a method for determining the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the maximum amplitude shear wave vibration signal of the HTI physical model medium, including:

[0086] Place the acoustic probe in the HTI physical model medium and ensure good contact between the two;

[0087] Rotate the acoustic probe so that it contacts the HTI physical model medium at different angles;

[0088] Record the shear wave vibration signal collected by the acoustic probe each time it rotates;

[0089] The angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the shear wave vibration signal of the maximum amplitude of the HTI physical model medium is determined according to all the shear wave vibration signals.

[0090] Example 5

[0091] This embodiment provides a method for determining the polarization direction of a shear wave of an ultrasound probe, including:

[0092] Prepare HTI physical model medium; the HTI medium physical model is a cylindrical or rectangular sample with samples of different materials distributed at equal intervals; the HTI medium physical model is provided with a partition to divide the cylindrical or rectangular sample, and the partition is an aluminum sheet; the thickness of the partition is 1 mm; determine the angle of the acoustic probe relative to the position of the HTI physical model medium when collecting the shear wave vibration signal of the maximum amplitude of the HTI physical model medium; the number of acoustic probes is two, and the acoustic probe has a built-in shear wave sensor; place the acoustic probe in the HTI physical model medium and ensure good contact between the two; rotate the acoustic probe to make it move at different angles contact the HTI physical model medium at an angle; record the shear wave vibration signal collected by the acoustic probe each time it rotates; the shear wave vibration signal includes amplitude and phase; determine the angle of the acoustic probe relative to the HTI physical model medium when collecting the shear wave vibration signal of the maximum amplitude of the HTI physical model medium based on all the shear wave vibration signals; fix the acoustic probe at this angle, rotate the HTI physical model medium at a fixed angle, record the shear wave vibration signal of the HTI physical model medium collected by the acoustic probe after each rotation of the HTI physical model medium, analyze all the shear wave vibration signals, and determine the shear wave polarization direction.

[0093] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for determining the transverse wave polarization direction of an ultrasonic probe, characterized in that, it includes: manufacturing an HTI physical model medium; determining the angle of the acoustic probe relative to the HTI physical model medium when collecting the transverse wave vibration signal with the maximum amplitude of the HTI physical model medium; fixing the acoustic probe at the said angle, rotating the HTI physical model medium, collecting the transverse wave vibration signals of the HTI physical model medium at different angles, and determining the transverse wave polarization direction according to the transverse wave vibration signals.

2. The method for determining the transverse wave polarization direction of an ultrasonic probe according to claim 1, characterized in that, the HTI medium physical model is a cylindrical or cuboid sample with different material samples evenly distributed.

3. The method for determining the transverse wave polarization direction of an ultrasonic probe according to claim 1, characterized in that, the determination of the angle of the acoustic probe relative to the HTI physical model medium when collecting the transverse wave vibration signal with the maximum amplitude of the HTI physical model medium specifically includes: placing the acoustic probe in the HTI physical model medium and ensuring good contact between the two; rotating the acoustic probe so that it contacts the HTI physical model medium at different angles; recording the transverse wave vibration signals collected by the acoustic probe each time it rotates; determining the angle of the acoustic probe relative to the HTI physical model medium when collecting the transverse wave vibration signal with the maximum amplitude of the HTI physical model medium according to all the transverse wave vibration signals.

4. The method for determining the transverse wave polarization direction of an ultrasonic probe according to claim 1, characterized in that, fixing the acoustic probe at the said angle, rotating the HTI physical model medium at a fixed angle, recording the transverse wave vibration signals of the HTI physical model medium collected by the acoustic probe after each rotation of the HTI physical model medium, and analyzing all the transverse wave vibration signals to determine the transverse wave polarization direction.

5. The method for determining the transverse wave polarization direction of an ultrasonic probe according to claim 1, characterized in that, the number of the acoustic probes is two.

6. The method for determining the transverse wave polarization direction of an ultrasonic probe according to claim 1, characterized in that, the transverse wave vibration signals include: amplitude and phase.

7. The method for determining the transverse wave polarization direction of an ultrasonic probe according to claim 2, characterized in that, the HTI medium physical model is internally provided with a partition layer to divide the cylindrical or cuboid sample, and the partition layer is an aluminum sheet.

8. The method for determining the transverse wave polarization direction of an ultrasonic probe according to claim 7, characterized in that, the thickness of the partition layer is 1 mm.

9. The method for determining the transverse wave polarization direction of an ultrasonic probe according to claim 1, characterized in that, the acoustic probe is internally provided with a transverse wave sensor.

10. An apparatus for determining the transverse wave polarization direction of an ultrasonic probe, characterized in that, it includes: a manufacturing module for manufacturing an HTI physical model medium; a first determination module for determining the angle of the acoustic probe relative to the HTI physical model medium when collecting the transverse wave vibration signal with the maximum amplitude of the HTI physical model medium; A second determination module, configured to fix the acoustic probe at the angle, rotate the HTI physical model medium, collect shear wave vibration signals of the HTI physical model medium at different angles, and determine the shear wave polarization direction according to the shear wave vibration signals.

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