A method, system, device and storage medium for measuring the wall thickness of a single crystal blade

Abstract

The present application discloses a method, system, device and storage medium for measuring the wall thickness of a single crystal blade, which relates to the field of ultrasonic measurement, including: mapping the echo parameters of the test area of ​​the single crystal blade to be measured to polar coordinates, obtaining an acoustic characteristic image of the test area, and extracting a curve of the echo amplitude attenuation rate of the test area, substituting the incident angle corresponding to the preset echo amplitude attenuation rate in the echo amplitude attenuation rate curve into a preset sound speed solution formula, and obtaining the ultrasonic propagation speed of the ultrasonic test area. The calculation parameters in the preset sound speed solution formula are determined based on the fitting of each comparison sample, and the cutting angle of each comparison sample covers the surface angle of each test area of ​​the single crystal blade to be measured. The wall thickness of the test area is determined according to the product of the propagation speed and the propagation time. The present application realizes parameter calibration of the preset sound speed solution formula based on each comparison sample, thereby improving the accuracy of the measured propagation speed and improving the measurement accuracy of the wall thickness of the single crystal blade.

Description

Technical Field

[0001] The present application relates to the field of ultrasonic measurement technology, and in particular to a method, system, device and storage medium for measuring the wall thickness of a single crystal blade. Background Art

[0002] Single-crystal blades are aircraft engine blades made from single crystal materials. To reduce the weight of aircraft engines, single-crystal blades usually adopt a hollow structure, so the wall thickness of the blade becomes a key parameter to ensure the strength of the single-crystal blade.

[0003] Since the blades cannot be cut after they are manufactured, the existing technology mostly uses ultrasonic thickness measurement technology to collect the wall thickness of the blades. However, the premise for ultrasonic thickness measurement technology to ensure measurement accuracy is that the propagation speed of ultrasonic waves in the material remains constant, and single crystal materials have anisotropic properties, that is, the propagation speed of ultrasonic waves in single crystal materials fluctuates greatly with different propagation directions. In addition, due to the large amplitude of the blade surface angle change, the propagation direction of ultrasonic waves in single crystal blades changes frequently, resulting in a large error in the propagation speed when the ultrasonic wave irradiates the single crystal blade at different incident angles, resulting in a decrease in the accuracy of the single crystal blade wall thickness measurement based on the propagation speed at each incident angle. Therefore, how to improve the measurement accuracy of the wall thickness of single crystal blades has become an urgent problem to be solved. Summary of the Invention

[0004] In view of the above problems, this application provides a method, system, device and storage medium for measuring the wall thickness of a single crystal blade to achieve the purpose of improving the measurement accuracy of the wall thickness of a single crystal blade. The specific solution is as follows:

[0005] A first aspect of the present application provides a method for measuring the wall thickness of a single crystal blade, comprising:

[0006] Performing ultrasonic polar scanning on a test area of ​​the single crystal blade to be tested to obtain echo parameters of the test area, wherein the echo parameters include echo amplitude parameters at various incident angles, and the echo amplitude parameters include various azimuth angles and their corresponding echo amplitudes;

[0007] Mapping the echo parameters to polar coordinates to obtain an acoustic characteristic image of the area to be measured, and extracting a curve of the echo amplitude decay rate of the area to be measured based on the acoustic characteristic image, where the echo amplitude decay rate is the difference between the maximum and minimum values ​​of the echo amplitude at different azimuth angles under the incident angle;

[0008] Determine the incident angle corresponding to the preset echo amplitude attenuation rate in the curve of the echo amplitude attenuation rate as the equivalent incident angle, and substitute the equivalent incident angle into a preset sound speed solution formula to obtain the propagation speed of the ultrasonic wave in the area to be measured, wherein the calculation parameters in the preset sound speed solution formula are determined based on the fitting of each comparison sample, the comparison sample and the single crystal blade to be measured are made of the same material, the set of cutting angles of each comparison sample covers the surface angle of each area to be measured of the single crystal blade to be measured, and the preset echo amplitude attenuation rate is a parameter determined based on the curve of the echo amplitude attenuation rate of each comparison sample;

[0009] The wall thickness of the area to be measured is determined according to the product of the propagation sound velocity and the propagation time of the ultrasonic wave in the area to be measured.

[0010] In a possible implementation, the process of obtaining the preset sound speed solution formula includes:

[0011] Determining the cutting angle of the comparison sample corresponding to the test area based on the surface angle of each test area of ​​the single crystal blade to be tested, and performing equal thickness cutting on a test piece made of the same material as the single crystal blade to be tested based on the cutting angle to obtain each comparison sample;

[0012] For each comparison sample: performing the ultrasonic polar scanning on the comparison sample to obtain the echo parameters of the comparison sample; mapping the echo parameters of the comparison sample to polar coordinates to obtain the acoustic characteristic image of the comparison sample; and extracting the curve of the echo amplitude attenuation rate of the comparison sample based on the acoustic characteristic image of the comparison sample;

[0013] Determining the echo amplitude decay rate common in the monotonically decreasing portion of the curve of the echo amplitude decay rate of each of the comparison samples as the preset echo amplitude decay rate; determining the equivalent incident angle of each of the comparison samples based on the preset echo amplitude decay rate;

[0014] The measured sound velocity V of each comparison sample is i and the equivalent incident angle θ i Substitute the initial sound speed into the solution formula:

[0015] V i =k×θ i +c,

[0016] The initial sound speed solution formula after substitution is fitted to obtain the first calculation parameter k and the second calculation parameter c, thereby obtaining the preset sound speed solution formula, wherein i is the serial number of the comparison sample.

[0017] In a possible implementation, the polar diameter of the acoustic characteristic image represents the incident angle, the polar angle of the acoustic characteristic image represents the azimuth angle, and the grayscale value of the acoustic characteristic image represents the intensity of the echo amplitude.

[0018] In a possible implementation, the cutting angle is the angle between the cutting surface of the comparison sample and the normal line of the side wall of the comparison sample.

[0019] A second aspect of the present application provides a system for measuring the wall thickness of a single crystal blade, comprising:

[0020] a parameter acquisition module, configured to perform ultrasonic polar scanning on a test area of ​​the single crystal blade to be tested, and obtain echo parameters of the test area, wherein the echo parameters include echo amplitude parameters at various incident angles, and the echo amplitude parameters include various azimuth angles and their corresponding echo amplitudes;

[0021] an image generation module, configured to map the echo parameters to polar coordinates to obtain an acoustic characteristic image of the area to be measured, and extract a curve of the echo amplitude decay rate of the area to be measured based on the acoustic characteristic image, wherein the echo amplitude decay rate is the difference between the maximum and minimum values ​​of the echo amplitude at different azimuth angles at the incident angle;

[0022] a sound velocity solution module, configured to determine the incident angle corresponding to the preset echo amplitude attenuation rate in the curve of the echo amplitude attenuation rate as an equivalent incident angle, and substitute the equivalent incident angle into a preset sound velocity solution formula to obtain the propagation speed of the ultrasonic wave in the area to be measured, wherein the calculation parameters in the preset sound velocity solution formula are determined based on the fitting of each comparison sample, the comparison sample is made of the same material as the single crystal blade to be measured, the set of cutting angles of each comparison sample covers the surface angles of each area to be measured of the single crystal blade to be measured, and the preset echo amplitude attenuation rate is a parameter determined based on the curve of the echo amplitude attenuation rate of each comparison sample;

[0023] The wall thickness determination module is used to determine the wall thickness of the area to be measured based on the product of the propagation speed of sound and the propagation time of the ultrasonic wave in the area to be measured.

[0024] In a possible implementation, the measurement system further includes a formula configuration module, and the formula configuration module is configured to be:

[0025] Determining the cutting angle of the comparison sample corresponding to the test area based on the surface angle of each test area of ​​the single crystal blade to be tested, and performing equal thickness cutting on a test piece made of the same material as the single crystal blade to be tested based on the cutting angle to obtain each comparison sample;

[0026] For each comparison sample: performing the ultrasonic polar scanning on the comparison sample to obtain the echo parameters of the comparison sample; mapping the echo parameters of the comparison sample to polar coordinates to obtain the acoustic characteristic image of the comparison sample; and extracting the curve of the echo amplitude attenuation rate of the comparison sample based on the acoustic characteristic image of the comparison sample;

[0027] Determining the echo amplitude decay rate common in the monotonically decreasing portion of the curve of the echo amplitude decay rate of each of the comparison samples as the preset echo amplitude decay rate; determining the equivalent incident angle of each of the comparison samples based on the preset echo amplitude decay rate;

[0028] The measured sound velocity V of each comparison sample is i and the equivalent incident angle θ i Substitute the initial sound speed into the solution formula:

[0029] V i =k×θ i +c,

[0030] The initial sound speed solution formula after substitution is fitted to obtain the first calculation parameter k and the second calculation parameter c, thereby obtaining the preset sound speed solution formula, wherein i is the serial number of the comparison sample.

[0031] In a possible implementation, the polar diameter of the acoustic characteristic image represents the incident angle, the polar angle of the acoustic characteristic image represents the azimuth angle, and the grayscale value of the acoustic characteristic image represents the intensity of the echo amplitude.

[0032] In a possible implementation, the cutting angle is the angle between the cutting surface of the comparison sample and the normal line of the side wall of the comparison sample.

[0033] A third aspect of the present application provides an electronic device, comprising at least one processor and a memory connected to the processor, wherein:

[0034] The memory is used to store computer programs;

[0035] The processor is used to execute the computer program so that the electronic device can implement the method for measuring the wall thickness of a single crystal blade according to the first aspect or any implementation of the first aspect.

[0036] The fourth aspect of the present application provides a computer storage medium, which carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement the method for measuring the wall thickness of a single crystal blade according to the above-mentioned first aspect or any implementation method of the first aspect.

[0037] By means of the above technical solution, the present application provides a method, system, device, and storage medium for measuring the wall thickness of a single crystal blade. By configuring an ultrasonic polar scan of a test area of ​​the single crystal blade to be tested, and determining an acoustic characteristic curve of the test area based on the obtained echo parameters, the acoustic characteristics of the test area are collected when the ultrasonic wave is detected at different incident angles and azimuths. Subsequently, the incident angle corresponding to a preset echo amplitude attenuation rate in the echo amplitude attenuation rate curve is determined as an equivalent incident angle, and the equivalent incident angle is substituted into a preset sound velocity solution formula to obtain the propagation speed of the ultrasonic wave in the test area. Since the calculation parameters in the preset sound velocity solution formula are determined based on the fitting of each comparison sample, the preset echo amplitude attenuation rate is a parameter determined based on the echo amplitude attenuation rate curve of each comparison sample, the comparison sample and the single crystal blade to be tested are made of the same material, and the set of cutting angles of each comparison sample covers the surface angles of each test area of ​​the single crystal blade to be tested, the accuracy of the determination of the equivalent incident angle and the propagation speed is ensured. It can be seen that the present application improves the measurement accuracy of the wall thickness of single crystal blades. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The above and other features, advantages, and aspects of the various embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. Throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the originals and elements are not necessarily drawn to scale.

[0039] Figure 1 A flow chart of a method for measuring the wall thickness of a single crystal blade provided in this application;

[0040] Figure 2 A schematic structural diagram of an ultrasonic polar scanning device provided in this application;

[0041] Figure 3 A schematic diagram of multiple incident angles at the same azimuth provided in this application;

[0042] Figure 4 Schematic diagram of how to obtain the comparison samples provided for this application;

[0043] Figure 5 Acoustic characteristic images of the comparison samples provided for this application;

[0044] Figure 6 Acoustic property images provided for this application;

[0045] Figure 7 The echo amplitude curve provided for this application;

[0046] Figure 8 A schematic diagram of a curve including the echo amplitude attenuation rate of each comparison sample provided in the present application;

[0047] Figure 9 A schematic diagram of the monotonically decreasing portion of the curve provided for this application;

[0048] Figure 10 Schematic diagram of the fitting curve provided for this application;

[0049] Figure 11 A block diagram of a system for measuring the wall thickness of a single crystal blade provided in this application;

[0050] Figure 12 This is a schematic diagram of the structure of an electronic device provided in this application. DETAILED DESCRIPTION

[0051] The following describes the embodiments of the present application in conjunction with the accompanying drawings. The terms used in the implementation methods of the present application are only used to explain the specific embodiments of the present application and are not intended to limit the present application.

[0052] The embodiments of the present application are described below in conjunction with the accompanying drawings. Those skilled in the art will appreciate that, with the development of technology and the emergence of new scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0053] The terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the terms used in this way can be interchangeable under appropriate circumstances, and this is merely a way of distinguishing the objects of the same attributes when describing them in the embodiments of the present application. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, so that the process, method, system, product or equipment comprising a series of units need not be limited to those units, but may include other units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0054] The first aspect of the present application provides a method for measuring the wall thickness of a single crystal blade, such as Figure 1 As shown, the method for measuring the wall thickness of the single crystal blade includes:

[0055] S101. Performing ultrasonic polar scanning on a test area of ​​a single crystal blade to obtain echo parameters of the test area, wherein the echo parameters include echo amplitude parameters at various incident angles, and the echo amplitude parameters include various azimuth angles and their corresponding echo amplitudes.

[0056] It should be noted that in practical applications, the aforementioned ultrasonic polar scan, also known as ultrasonic polar scan (UPS), replaces the translational motion of a classic ultrasonic C-scan device with rotational motion. By performing an ultrasonic polar scan on the test area, ultrasonic detection is achieved at all angles within the test area, enabling the acquisition of echo amplitudes corresponding to all azimuths at all angles of incidence. This avoids omissions and improves the accuracy of the acquired echo amplitudes.

[0057] It should be noted that, in actual application scenarios, there are various device structures for performing ultrasonic pole scanning on the test area of ​​the single crystal blade to be tested. Here, an exemplary embodiment is provided:

[0058] like Figure 2 The figure shows a schematic diagram of the structure of an ultrasonic pole scanning device. The ultrasonic pole scanning device includes: a rotating frame 1, a phased array probe 2, a measuring instrument 3 and a supporting platform 5. The supporting platform 5 is used to carry the single crystal blade 4 to be measured. The rotating frame 1 is used to drive the phased array probe 2 to rotate with the normal line of the supporting surface of the supporting platform 5 as the axis, so that the phased array probe 2 can detect the single crystal blade 4 to be measured from all azimuth angles and collect the echo amplitude. The measuring instrument 3 is used to detect the single crystal blade 4 to be measured according to the above. Figure 1 Step S101 shown above obtains echo parameters, and then steps S102 to S104 are executed below to output the wall thickness of the area to be measured. It should be noted that the phased array probe 2 is an ultrasonic probe that integrates multiple transducers. Due to the different positions of the transducers in the phased array probe 2, the ultrasonic waves emitted by the transducers have different incident angles, thereby enabling detection of the single crystal blade 4 to be measured at different incident angles.

[0059] S102. Map the echo parameters to polar coordinates to obtain an acoustic characteristic image of the area to be measured, and extract a curve of the echo amplitude attenuation rate of the area to be measured based on the acoustic characteristic image. The echo amplitude attenuation rate is the difference between the maximum and minimum values ​​of the echo amplitude at different azimuths for an incident angle.

[0060] It should be noted that in actual application scenarios, since the above-mentioned echo parameters include parameters in multiple dimensions such as incident angle, azimuth angle and echo amplitude, in order to avoid the risk of errors caused by the dimensions of parameters of different dimensions during data analysis, the above-mentioned echo parameters can be normalized before being mapped to polar coordinates to avoid the risk of errors caused by dimensional differences.

[0061] It should be noted that in actual application scenarios, since the above-mentioned acoustic characteristic image includes data in three dimensions: incident angle, azimuth angle, and echo amplitude, the efficiency of subsequent determination of the equivalent incident angle is reduced. Therefore, the present application configures a curve for extracting the echo amplitude attenuation rate of the test area based on the acoustic characteristic image. Since the echo amplitude attenuation rate is the difference between the maximum and minimum values ​​of the echo amplitude at different azimuth angles for an incident angle, the extracted echo amplitude attenuation rate curve only retains data in two dimensions: the incident angle and the difference between the maximum and minimum values ​​of the echo amplitude, thereby achieving data dimensionality reduction and improving the efficiency of determining the equivalent incident angle.

[0062] It should be noted that in actual application scenarios, the above-mentioned incident angle is the angle between the direction line of the ultrasonic wave irradiating the area to be measured and the normal line of the area to be measured. Figure 3 The figure shows a schematic diagram of multiple incident angles at the same azimuth angle, where ∠1 to ∠5 are the angles between the ultrasonic propagation direction lines emitted by different elements of different phased array probes 2 and the normal line 6 of the test area. Due to the anisotropic properties of single crystal materials, different propagation directions affect the propagation speed of ultrasonic waves. Therefore, the present application configures a curve to extract the echo amplitude attenuation rate of the test area, using the echo amplitude attenuation rate as the difference between the maximum and minimum echo amplitudes at different azimuth angles for an incident angle, thereby realizing the extraction of echo amplitude fluctuation characteristics under different ultrasonic propagation directions.

[0063] S103. Determine the incident angle corresponding to the preset echo amplitude attenuation rate in the curve of the echo amplitude attenuation rate as the equivalent incident angle, and substitute the equivalent incident angle into the preset sound speed solution formula to obtain the propagation speed of the ultrasonic wave in the area to be measured, wherein the calculation parameters in the preset sound speed solution formula are determined based on the fitting of each comparison sample, the comparison sample is made of the same material as the single crystal blade to be measured, the set of cutting angles of each comparison sample covers the surface angles of each area to be measured of the single crystal blade to be measured, and the preset echo amplitude attenuation rate is a parameter determined based on the curve of the echo amplitude attenuation rate of each comparison sample.

[0064] It should be noted that in actual application scenarios, the present application determines the incident angle corresponding to the preset echo amplitude attenuation rate in the echo amplitude attenuation rate curve as the equivalent incident angle, and substitutes the equivalent incident angle into the preset sound speed solution formula to obtain the propagation speed of the ultrasonic wave in the test area. Since the calculation parameters in the above-mentioned preset sound speed solution formula are determined based on the fitting of each comparison sample, the preset echo amplitude attenuation rate is a parameter determined based on the curve of the echo amplitude attenuation rate of each comparison sample, the comparison sample is made of the same material as the single crystal blade to be tested, and the set of cutting angles of each comparison sample covers the surface angles of each test area of ​​the single crystal blade to be tested, thereby ensuring the determination accuracy of the above-mentioned equivalent incident angle and the above-mentioned propagation speed, thereby improving the wall thickness accuracy of the finally determined test area.

[0065] S104 : Determine the wall thickness of the area to be measured based on the product of the propagation speed of sound and the propagation time of the ultrasonic wave in the area to be measured.

[0066] It should be noted that in actual application scenarios, the above Figure 1 The implementation of step S104 shown may be:

[0067] According to the propagation speed of sound V and propagation time t, the formula is: Calculate the wall thickness T of the area to be measured.

[0068] The present application configures an ultrasonic polar scan of the test area of ​​the single-crystal blade to be tested, and determines the acoustic characteristic curve of the test area based on the obtained echo parameters, thereby realizing the acquisition of the acoustic characteristics of the test area when the ultrasonic wave is detected at different incident angles and azimuths. Subsequently, by configuring the incident angle corresponding to the preset echo amplitude attenuation rate in the echo amplitude attenuation rate curve to be determined as the equivalent incident angle, and substituting the equivalent incident angle into the preset sound speed solution formula, the propagation speed of the ultrasonic wave in the test area is obtained. Since the calculation parameters in the above-mentioned preset sound speed solution formula are determined based on the fitting of each comparison sample, the preset echo amplitude attenuation rate is a parameter determined based on the echo amplitude attenuation rate curve of each comparison sample, the comparison sample and the single-crystal blade to be tested are made of the same material, and the set of cutting angles of each comparison sample covers the surface angles of each test area of ​​the single-crystal blade to be tested, thus ensuring the determination accuracy of the above-mentioned equivalent incident angle and the above-mentioned propagation speed. It can be seen that the present application improves the measurement accuracy of the wall thickness of the single-crystal blade.

[0069] In one possible implementation, the process of obtaining the above-mentioned preset sound speed solution formula includes:

[0070] Determine the cutting angle of the comparison sample corresponding to the test area based on the surface angle of each test area of ​​the single crystal blade to be tested, and perform equal thickness cutting on the test piece made of the same material as the single crystal blade to be tested based on the cutting angle to obtain each comparison sample;

[0071] For each comparison sample: performing an ultrasonic polar scan on the comparison sample to obtain echo parameters of the comparison sample; mapping the echo parameters of the comparison sample to polar coordinates to obtain an acoustic characteristic image of the comparison sample; and extracting a curve of the echo amplitude attenuation rate of the comparison sample based on the acoustic characteristic image of the comparison sample;

[0072] Determining the common echo amplitude attenuation rate in the monotonically decreasing portion of the curve of the echo amplitude attenuation rate of each comparison sample as a preset echo amplitude attenuation rate; determining the equivalent incident angle of each comparison sample based on the preset echo amplitude attenuation rate;

[0073] The measured sound velocity V of each comparison sample iand the equivalent incident angle θ i Substitute the initial sound speed into the solution formula:

[0074] V i =k×θ i +c,

[0075] The initial sound speed solution formula after substitution is fitted to obtain the first calculation parameter k and the second calculation parameter c, thereby obtaining the preset sound speed solution formula, where i is the serial number of the comparison sample.

[0076] It should be noted that, in actual application scenarios, there are many ways to obtain the above-mentioned comparison samples, and an exemplary method is provided here:

[0077] like Figure 4 Figure 2 shows a schematic diagram of how to obtain a comparison sample. Sample rod 6 can be a byproduct of the same production furnace as the single crystal blade to be measured. By configuring sample rod 6 to be made of the same material as the single crystal blade to be measured and produced in the same furnace, the present application improves the similarity in physical properties between sample rod 6 and the single crystal blade to be measured, thereby reducing the impact of physical property errors on subsequent thickness measurement accuracy.

[0078] Assuming that the surface angle fluctuation range of each test area of ​​the single crystal blade to be tested is 0° to 45°, the sample rod 6 is cut with equal thickness at a fixed cutting angle interval to obtain the following: Figure 4 Comparative samples 601 to 610 are shown. T601 to T610 represent the thicknesses of each of these samples, and all have the same thickness. The cutting angle interval is 5°: Comparative sample 601 has a cutting angle of 0°, comparative sample 602 has a cutting angle of 5°, comparative sample 603 has a cutting angle of 10°, ..., comparative sample 609 has a cutting angle of 40°, and comparative sample 610 has a cutting angle of 45°.

[0079] It should be noted that the present application configures a test piece with the same material as the single crystal blade to be tested based on a cutting angle for equal thickness cutting, so that the cutting angle of each comparison sample obtained can cover the surface angle of each test area of ​​the single crystal blade to be tested, thereby using the comparison sample to simulate the acoustic characteristics of each test area of ​​the single crystal blade to be tested, and then calibrates the calculation parameters of the initial sound velocity solution formula based on each comparison sample, so that the obtained preset sound velocity solution formula is compatible with the single crystal blade to be tested.

[0080] It should be noted that, in actual application scenarios, the above acoustic characteristic images can be Figure 5 As shown:

[0081] Figure 5 For this application, the researchers have Figure 4After obtaining the comparison samples in the manner shown, ultrasonic polar scanning is performed on comparison samples 602, comparison samples 606 and comparison samples 610, and the obtained echo parameters are mapped to polar coordinates to obtain the acoustic characteristic images of the comparison samples. Among them, the black irregular outline in the middle area of ​​each acoustic characteristic image indicates that each comparison sample is made of single crystal material. The polar diameter is the distance between the center of the circle and the circumference of each circle, which represents different angles of incidence. The polar angle is the angle between the two end points of each equally divided circle and the line connecting the center of the circle after the circumference is divided into equal parts. Figure 5 As shown, the polar angles are 10°, 20°, 30°, 40°, and 50°. Polar angles are measured in 30-degree intervals, from 0° to 360° (coinciding with 0°). The grayscale values ​​in the figure range from 0 to 1. Darker grayscale indicates smaller echo amplitude, while lighter grayscale indicates larger echo amplitude.

[0082] It should be noted that the above Figure 5 It can be seen that the obtained acoustic characteristic image contains data from multiple dimensions and has a high degree of data coupling, making data processing and analysis directly based on the acoustic characteristic image difficult and requiring a lot of computing power. Therefore, this application achieves dimensionality reduction and decoupling of the acoustic feature data in the acoustic characteristic image by configuring a curve for extracting the echo amplitude attenuation rate based on the acoustic characteristic image, thereby reducing the difficulty of processing and analyzing the acoustic feature data and reducing the computing power required.

[0083] It should be noted that, in actual application scenarios, the implementation method of extracting the echo amplitude attenuation rate image based on the acoustic characteristic image can be: Figure 5 Take the acoustic characteristic image of the comparison sample 610 as an example: Figure 6 Each incident angle in the acoustic characteristic image shown: collect the normalized echo amplitude corresponding to each azimuth angle under the incident angle (in Figure 6 Taking the 35° incident angle as an example), the echo amplitude curve under this incident angle is generated. Figure 7 shown.

[0084] After obtaining the echo amplitude curve at each incident angle, for each incident angle: the difference between the maximum and minimum echo amplitudes at each azimuth angle under the incident angle is determined as the echo amplitude attenuation rate at the incident angle.

[0085] For each comparison sample: the echo amplitude attenuation rate of the comparison sample at each incident angle is sequentially connected to obtain the curve of the echo amplitude attenuation rate of the comparison sample. The schematic diagram including the curve of the echo amplitude attenuation rate of each comparison sample is as follows Figure 8 shown.

[0086] It should be noted that in actual application scenarios, the researchers of this application discovered through extensive experiments that the echo amplitude decay rate curves of different comparison samples all follow a "rising first, then falling" pattern. However, the echo amplitude decay rates of different comparison samples at the same incident angle may exhibit a lag in their change. Therefore, this application determines the preset echo amplitude decay rate from the monotonically decreasing portion of the echo amplitude decay rate curves of each comparison sample, thus avoiding the impact of the lag in the echo amplitude decay rate on the fitting accuracy during subsequent fitting.

[0087] It should be noted that, in actual application scenarios, the process of obtaining the preset sound speed solution formula can be:

[0088] like Figure 9 As shown above, Figure 8 The schematic diagram of the monotonically decreasing part of the curve extracted from the schematic diagram shown in FIG. 0.3 is selected as the preset echo amplitude attenuation rate, and Figure 9 The equivalent incident angle corresponding to each comparison sample and the preset echo amplitude attenuation rate is selected respectively.

[0089] Then, the measured sound velocity V of each comparison sample is i and the equivalent incident angle θ i Substitute the initial sound speed into the formula: V i =k×θ i +c. And the initial sound velocity solution formula after substitution is fitted, and the fitting curve diagram is shown as follows Figure 10 By taking the 95% confidence interval to obtain the fitting result, the first calculation parameter k and the second calculation parameter c can be obtained, thereby obtaining the preset sound speed solution formula.

[0090] The measured sound velocity may be the longitudinal wave sound velocity obtained by measuring the thickness of the comparison sample using a micrometer and dividing the result by the sound time of the ultrasonic wave propagating in one direction in the comparison sample.

[0091] In a possible implementation, the polar diameter of the acoustic characteristic image represents the incident angle, the polar angle of the acoustic characteristic image represents the azimuth angle, and the grayscale value of the acoustic characteristic image represents the intensity of the echo amplitude.

[0092] In a possible implementation, the cutting angle is the angle between the cutting surface of the comparison sample and the normal line of the side wall of the comparison sample.

[0093] The second aspect of the present application provides a system for measuring the wall thickness of a single crystal blade, such as Figure 11 As shown, the single crystal blade wall thickness measurement system includes:

[0094] The parameter acquisition module 1101 is used to perform ultrasonic polar scanning on the test area of ​​the single crystal blade to obtain echo parameters of the test area, wherein the echo parameters include echo amplitude parameters at various incident angles, and the echo amplitude parameters include various azimuth angles and their corresponding echo amplitudes;

[0095] An image generation module 1102 is configured to map the echo parameters to polar coordinates to obtain an acoustic characteristic image of the area to be measured, and to extract a curve of the echo amplitude decay rate of the area to be measured based on the acoustic characteristic image. The echo amplitude decay rate is the difference between the maximum and minimum echo amplitudes at different azimuths for a given incident angle.

[0096] A sound velocity solution module 1103 is configured to determine the incident angle corresponding to the preset echo amplitude attenuation rate in the echo amplitude attenuation rate curve as an equivalent incident angle, and substitute the equivalent incident angle into a preset sound velocity solution formula to obtain the propagation speed of the ultrasonic wave in the test area, wherein the calculation parameters in the preset sound velocity solution formula are determined based on the fitting of each comparison sample, the comparison sample and the single crystal blade to be tested are made of the same material, the set of cutting angles of each comparison sample covers the surface angles of each test area of ​​the single crystal blade to be tested, and the preset echo amplitude attenuation rate is a parameter determined based on the curve of the echo amplitude attenuation rate of each comparison sample;

[0097] The wall thickness determination module 1104 is configured to determine the wall thickness of the area to be measured based on the product of the propagation speed of sound and the propagation time of the ultrasonic wave in the area to be measured.

[0098] In one possible implementation, the above Figure 11 The single crystal blade wall thickness measurement system shown further includes a formula configuration module, which is configured to be:

[0099] Determine the cutting angle of the comparison sample corresponding to the test area based on the surface angle of each test area of ​​the single crystal blade to be tested, and perform equal thickness cutting on the test piece made of the same material as the single crystal blade to be tested based on the cutting angle to obtain each comparison sample;

[0100] For each comparison sample: performing an ultrasonic polar scan on the comparison sample to obtain echo parameters of the comparison sample; mapping the echo parameters of the comparison sample to polar coordinates to obtain an acoustic characteristic image of the comparison sample; and extracting a curve of the echo amplitude attenuation rate of the comparison sample based on the acoustic characteristic image of the comparison sample;

[0101] Determining the common echo amplitude attenuation rate in the monotonically decreasing portion of the curve of the echo amplitude attenuation rate of each comparison sample as a preset echo amplitude attenuation rate; determining the equivalent incident angle of each comparison sample based on the preset echo amplitude attenuation rate;

[0102] The measured sound velocity V of each comparison sample iand the equivalent incident angle θ i Substitute the initial sound speed into the solution formula:

[0103] V i =k×θ i +c,

[0104] The initial sound speed solution formula after substitution is fitted to obtain the first calculation parameter k and the second calculation parameter c, thereby obtaining the preset sound speed solution formula, where i is the serial number of the comparison sample.

[0105] In a possible implementation, the polar diameter of the acoustic characteristic image represents the incident angle, the polar angle of the acoustic characteristic image represents the azimuth angle, and the grayscale value of the acoustic characteristic image represents the intensity of the echo amplitude.

[0106] In a possible implementation, the cutting angle is the angle between the cutting surface of the comparison sample and the normal line of the side wall of the comparison sample.

[0107] An electronic device is also provided in an embodiment of the present application. Figure 12 , which shows a schematic diagram of the structure of an electronic device suitable for implementing the embodiments of the present application. The electronic device in the embodiments of the present application may include but is not limited to fixed terminals such as mobile phones, laptops, PDAs (personal digital assistants), PADs (tablet computers), desktop computers, etc. Figure 12 The electronic device shown is merely an example and should not limit the functions and scope of use of the embodiments of the present application.

[0108] like Figure 12 As shown, the electronic device may include a processing device (e.g., a central processing unit, a graphics processing unit, etc.) 1201, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1202 or a program loaded from a storage device 1208 into a random access memory (RAM) 1203. When the electronic device is powered on, the RAM 1203 also stores various programs and data required for the operation of the electronic device. The processing device 1201, the ROM 1202, and the RAM 1203 are connected to each other via a bus 1204. An input / output (I / O) interface 1205 is also connected to the bus 1204.

[0109] Typically, the following devices may be connected to the I / O interface 1205: an input device 1206 including, for example, a touch screen, a touchpad, a keyboard, a mouse, a camera, a microphone, an accelerometer, a gyroscope, etc.; an output device 1207 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; a storage device 1208 including, for example, a memory card, a hard disk, etc.; and a communication device 1209. The communication device 1209 may allow the electronic device to communicate with other devices wirelessly or by wire to exchange data. Although Figure 12 The electronic device is shown with various devices, but it should be understood that it is not required to implement or possess all of the devices shown. More or fewer devices may be implemented or possessed instead.

[0110] An embodiment of the present application also provides a computer program product including computer-readable instructions. When the computer-readable instructions are executed on an electronic device, the electronic device implements any single crystal blade wall thickness measurement method provided in the embodiment of the present application.

[0111] A computer-readable storage medium is also provided in an embodiment of the present application. The storage medium carries one or more computer programs. When the one or more computer programs are executed by an electronic device, the electronic device can implement any single crystal blade wall thickness measurement method provided in the embodiment of the present application.

[0112] It should also be noted that the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed across multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. In addition, in the drawings of the device embodiments provided in this application, the connection relationship between the modules indicates that there is a communication connection between them, which can be specifically implemented as one or more communication buses or signal lines.

[0113] Through the description of the above embodiments, those skilled in the art can clearly understand that the present application can be implemented by means of software plus necessary general hardware, and of course can also be implemented by special hardware including application-specific integrated circuits, special CPUs, special memories, special components, etc. In general, all functions performed by computer programs can be easily implemented with corresponding hardware, and the specific hardware structures used to implement the same function can also be diverse, such as analog circuits, digital circuits or special circuits, etc. However, for the present application, software program implementation is a better implementation method in most cases. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a readable storage medium, such as a computer's floppy disk, USB flash drive, mobile hard disk, ROM, RAM, magnetic disk or optical disk, etc., and includes a number of instructions to enable a computer device (which can be a personal computer, training equipment, or network equipment, etc.) to execute the methods described in each embodiment of the present application.

[0114] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the embodiments may be implemented in the form of a computer program product.

[0115] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website, a computer, a training device or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website, a computer, a training device or a data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a training device, a data center, etc. that includes one or more available media integrations. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive (SSD)).

Claims

1. A method for measuring the wall thickness of a single crystal blade, characterized in that: include: Performing ultrasonic polar scanning on a test area of ​​the single crystal blade to be tested to obtain echo parameters of the test area, wherein the echo parameters include echo amplitude parameters at various incident angles, and the echo amplitude parameters include various azimuth angles and their corresponding echo amplitudes; Mapping the echo parameters to polar coordinates to obtain an acoustic characteristic image of the area to be measured, and extracting a curve of the echo amplitude decay rate of the area to be measured based on the acoustic characteristic image, where the echo amplitude decay rate is the difference between the maximum and minimum values ​​of the echo amplitude at different azimuth angles under the incident angle; Determine the incident angle corresponding to the preset echo amplitude attenuation rate in the curve of the echo amplitude attenuation rate as the equivalent incident angle, and substitute the equivalent incident angle into a preset sound speed solution formula to obtain the propagation speed of the ultrasonic wave in the area to be measured, wherein the calculation parameters in the preset sound speed solution formula are determined based on the fitting of each comparison sample, the comparison sample and the single crystal blade to be measured are made of the same material, the set of cutting angles of each comparison sample covers the surface angle of each area to be measured of the single crystal blade to be measured, and the preset echo amplitude attenuation rate is a parameter determined based on the curve of the echo amplitude attenuation rate of each comparison sample; The wall thickness of the area to be measured is determined according to the product of the propagation sound velocity and the propagation time of the ultrasonic wave in the area to be measured.

2. The measuring method according to claim 1, wherein The process of obtaining the preset sound speed solution formula includes: Determining the cutting angle of the comparison sample corresponding to the test area based on the surface angle of each test area of ​​the single crystal blade to be tested, and performing equal thickness cutting on a test piece made of the same material as the single crystal blade to be tested based on the cutting angle to obtain each comparison sample; For each comparison sample: performing the ultrasonic polar scanning on the comparison sample to obtain the echo parameters of the comparison sample; mapping the echo parameters of the comparison sample to polar coordinates to obtain the acoustic characteristic image of the comparison sample; and extracting the curve of the echo amplitude attenuation rate of the comparison sample based on the acoustic characteristic image of the comparison sample; Determining the echo amplitude decay rate common in the monotonically decreasing portion of the curve of the echo amplitude decay rate of each of the comparison samples as the preset echo amplitude decay rate; determining the equivalent incident angle of each of the comparison samples based on the preset echo amplitude decay rate; The measured sound velocity V of each comparison sample is i and the equivalent incident angle θ i Substitute the initial sound speed into the solution formula: In i =k×θ i +c, The initial sound speed solution formula after substitution is fitted to obtain the first calculation parameter k and the second calculation parameter c, thereby obtaining the preset sound speed solution formula, wherein i is the serial number of the comparison sample.

3. The measuring method according to claim 2, characterized in that The polar diameter of the acoustic characteristic image represents the incident angle, the polar angle of the acoustic characteristic image represents the azimuth angle, and the grayscale value of the acoustic characteristic image represents the intensity of the echo amplitude.

4. The measuring method according to claim 2, characterized in that The cutting angle is the angle between the cutting surface of the comparison sample and the normal line of the side wall of the comparison sample.

5. A system for measuring the wall thickness of a single crystal blade, characterized in that: include: a parameter acquisition module, configured to perform ultrasonic polar scanning on a test area of ​​the single crystal blade to be tested, and obtain echo parameters of the test area, wherein the echo parameters include echo amplitude parameters at various incident angles, and the echo amplitude parameters include various azimuth angles and their corresponding echo amplitudes; an image generation module, configured to map the echo parameters to polar coordinates to obtain an acoustic characteristic image of the area to be measured, and extract a curve of the echo amplitude decay rate of the area to be measured based on the acoustic characteristic image, wherein the echo amplitude decay rate is the difference between the maximum and minimum values ​​of the echo amplitude at different azimuth angles at the incident angle; a sound velocity solution module, configured to determine the incident angle corresponding to the preset echo amplitude attenuation rate in the curve of the echo amplitude attenuation rate as an equivalent incident angle, and substitute the equivalent incident angle into a preset sound velocity solution formula to obtain the propagation speed of the ultrasonic wave in the area to be measured, wherein the calculation parameters in the preset sound velocity solution formula are determined based on the fitting of each comparison sample, the comparison sample is made of the same material as the single crystal blade to be measured, the set of cutting angles of each comparison sample covers the surface angles of each area to be measured of the single crystal blade to be measured, and the preset echo amplitude attenuation rate is a parameter determined based on the curve of the echo amplitude attenuation rate of each comparison sample; The wall thickness determination module is used to determine the wall thickness of the area to be measured based on the product of the propagation speed of sound and the propagation time of the ultrasonic wave in the area to be measured.

6. The measurement system according to claim 5, characterized in that The measurement system further includes a formula configuration module, which is configured to: Determining the cutting angle of the comparison sample corresponding to the test area based on the surface angle of each test area of ​​the single crystal blade to be tested, and performing equal thickness cutting on a test piece made of the same material as the single crystal blade to be tested based on the cutting angle to obtain each comparison sample; For each of the comparison samples: performing the ultrasonic polar scanning on the comparison sample to obtain the echo parameters of the comparison sample; Mapping the echo parameters of the comparison sample to polar coordinates to obtain the acoustic characteristic image of the comparison sample, and extracting a curve of the echo amplitude attenuation rate of the comparison sample based on the acoustic characteristic image of the comparison sample; Determining the echo amplitude decay rate common in the monotonically decreasing portion of the curve of the echo amplitude decay rate of each of the comparison samples as the preset echo amplitude decay rate; Determining the equivalent incident angle of each of the comparison samples based on the preset echo amplitude attenuation rate; The measured sound velocity V of each comparison sample is i and the equivalent incident angle θ i Substitute the initial sound speed into the solution formula: In i =k×θ i +c, The initial sound speed solution formula after substitution is fitted to obtain the first calculation parameter k and the second calculation parameter c, thereby obtaining the preset sound speed solution formula, wherein i is the serial number of the comparison sample.

7. The measurement system according to claim 6, characterized in that The polar diameter of the acoustic characteristic image represents the incident angle, the polar angle of the acoustic characteristic image represents the azimuth angle, and the grayscale value of the acoustic characteristic image represents the intensity of the echo amplitude.

8. The measurement system according to claim 6, characterized in that The cutting angle is the angle between the cutting surface of the comparison sample and the normal line of the side wall of the comparison sample.

9. An electronic device, characterized in that: comprising at least one processor and a memory connected to the processor, wherein: The memory is used to store computer programs; The processor is configured to execute the computer program so as to enable the electronic device to implement the method for measuring the wall thickness of a single crystal blade according to any one of claims 1 to 4.

10. A computer storage medium, characterized in that The storage medium carries one or more computer programs, and when the one or more computer programs are executed by an electronic device, the electronic device can implement the method for measuring the wall thickness of a single crystal blade as claimed in any one of claims 1 to 4.

Images