Method and device for detecting dynamic coaxiality of ultrasonic scanning probe

Abstract

The invention relates to the technical field of composite material detection, in particular to an ultrasonic scanning probe dynamic coaxiality detection method and device.The ultrasonic scanning probe dynamic coaxiality detection method comprises the steps that a test block is fixedly supported between a transmitting probe and a receiving probe, and the test block is formed by machining a transparent material multi-curved-surface plate; a plurality of coaxially distributed positioning marks are processed on the two sides of the blade; respectively providing water spraying coupling among the transmitting probe, the receiving probe and the surface of the test block through a scanning unit to form a right water column and a left water column; moving the transmitting probe and the receiving probe to each selected position in the test block through a scanning unit according to a given ultrasonic scanning track; and determining a dynamic coaxial alignment degree evaluation factor according to the number of position points of the right water column and the left water column in the corresponding positioning marks in the test block and the total number of the positioning marks.

Description

Technical Field

[0001] The present application relates to the technical field of composite material detection, and in particular to a method and device for detecting the dynamic coaxiality of an ultrasonic scanning probe. Background Art

[0002] Composite blades are key components of aircraft engines, with complex geometric shapes and internal laminate structures. For quality and safety reasons, they require ultrasonic three-dimensional (3D) automated scanning and inspection. During penetration ultrasonic 3D automated scanning and inspection, the transmitting and receiving probes must be consistently aligned to obtain the optimal ultrasonic inspection signal. Signals from ultrasonic 3D automated scanning and inspection are typically in the mV range and are particularly susceptible to probe misalignment. The larger and more complex the composite part being inspected, the longer the water coupling distance, and the lower the accuracy of the equipment's 3D scanning trajectory, the more severe the impact of probe misalignment on the inspection signal, potentially even preventing accurate ultrasonic 3D automated scanning inspection results. During ultrasonic 3D scanning of composite blades, the impact of probe misalignment on the inspection signal is particularly pronounced.

[0003] Currently, in some ultrasonic 3D scanning equipment and testing practices, one detection method uses a measuring instrument to perform static mechanical measurement of the probe's coaxial alignment, and then evaluates the probe's coaxial alignment based on the static measurement results. This static measurement and evaluation method does not capture the dynamic coaxial alignment of the probe during the ultrasonic 3D automated scanning process. Another detection method is an indirect detection and evaluation method based on ultrasonic signal fluctuations. This method uses homogeneous materials, such as plexiglass sheets, to indirectly detect and evaluate the probe's coaxial alignment by observing ultrasonic signal fluctuations. Currently, there are no dynamic coaxial alignment detection methods, test blocks, test equipment, quantitative evaluation methods, or grading models specifically tailored to the actual ultrasonic 3D scanning scenario of composite blades being inspected. This has hampered the effectiveness and accuracy of ultrasonic 3D automated scanning inspections of composite blades. Summary of the Invention

[0004] The present application provides a method and device for detecting the dynamic coaxiality of an ultrasonic scanning probe to solve the problems in the above-mentioned background technology.

[0005] In a first aspect, the present application provides a method for detecting the dynamic coaxiality of an ultrasonic scanning probe, comprising: A test block is fixed between the transmitting probe and the receiving probe. The test block is made of a multi-curved transparent material panel and has the same shape as the blade to be tested. Multiple coaxially distributed positioning marks are processed on both sides. A scanning unit is used to provide water spray coupling between the transmitting probe, the receiving probe and the surface of the test block, respectively, to form a right water column and a left water column; The scanning unit moves the transmitting probe and the receiving probe to each selected position in the test block according to a given ultrasonic scanning trajectory. Determine the dynamic coaxial alignment evaluation factor according to the number of position points of the right water column and the left water column within the corresponding positioning marks in the test block and the total number of positioning marks.

[0006] Further, before fixing the test block between the transmitting probe and the receiving probe, it further includes: Performing static coaxial alignment calibration on the transmitting probe and the receiving probe using a calibration block, which is processed from a transparent material flat plate, and multiple coaxially distributed positioning marks are processed on both sides respectively.

[0007] Further, the performing static coaxial alignment calibration on the transmitting probe and the receiving probe using the calibration block includes: Fix the calibration block between the transmitting probe and the receiving probe; The scanning unit respectively provides water spray coupling between the transmitting probe, the receiving probe and the surface of the calibration block to form a right water column and a left water column; The scanning unit moves the transmitting probe and the receiving probe to each calibration position in the calibration block according to a given ultrasonic scanning trajectory; Complete the static coaxial alignment calibration according to the positioning marks of the calibration block and the ultrasonic transmission signals in the ultrasonic and imaging unit.

[0008] Further, a right auxiliary aligner is designed on the transmitting probe for outputting a right collimated laser cursor beam parallel to the transmitting probe; a left auxiliary aligner is designed on the receiving probe for outputting a left collimated laser cursor beam parallel to the receiving probe; Each positioning mark includes a first mark and a second mark, and the distance between the first mark and the second mark is the same as the distance between the probe and the auxiliary aligner.

[0009] Further, the completing the static coaxial alignment calibration according to the positioning marks of the calibration block and the ultrasonic transmission signals in the ultrasonic and imaging unit includes: Make the right water column be within the right first mark of the calibration block and the spot of the right collimated laser cursor beam be aligned with the center of the right second mark of the calibration block; Make the left water column be within the left first mark of the calibration block and the spot of the left collimated laser cursor beam be aligned with the center of the left second mark of the calibration block; When the fluctuation of the ultrasonic transmission signal in the ultrasonic and imaging unit meets the preset conditions, complete the static coaxial alignment calibration of the current calibration position.

[0010] Further, determining the dynamic coaxial alignment evaluation factor according to the number of position points of the right water column and the left water column within the corresponding positioning marks in the test block includes: Recording the number of position points of the right water column and the left water column within the corresponding first marks in the test block, and the position points of the light spots of the right collimated laser cursor beam and the left collimated laser cursor beam at the centers of the corresponding second marks in the test block; Determining the dynamic coaxial alignment evaluation factor according to the ratio between the number of position points and the total number of positioning marks.

[0011] Further, determining the dynamic coaxial alignment evaluation factor according to the ratio between the number of position points and the total number of positioning marks includes: If the ratio between the number of position points and the total number of positioning marks is greater than or equal to a first preset value, the dynamic coaxial alignment is rated as Grade I; If the ratio between the number of position points and the total number of positioning marks is greater than or equal to a second preset value and less than the first preset value, the dynamic coaxial alignment is rated as Grade II; If the ratio between the number of position points and the total number of positioning marks is greater than or equal to a third preset value and less than the second preset value, the dynamic coaxial alignment is rated as Grade III; If the ratio between the number of position points and the total number of positioning marks is greater than or equal to a fourth preset value and less than the third preset value, the dynamic coaxial alignment is rated as Grade IV; If the ratio between the number of position points and the total number of positioning marks is less than the fourth preset value, the dynamic coaxial alignment is rated as Grade V.

[0012] In a second aspect, the present application provides an ultrasonic scanning probe dynamic coaxiality detection device, including a transmitting probe, a receiving probe, a calibration block, a scanning unit, an ultrasonic and imaging unit, a test block, a right auxiliary aligner, and a left auxiliary aligner; The ultrasonic scanning probe dynamic coaxiality detection device is used to implement the ultrasonic scanning probe dynamic coaxiality detection method as described above.

[0013] Further, the calibration block is processed from a transparent material flat plate, and multiple coaxially distributed positioning marks are processed on both sides; The test block is processed from a transparent material multi-curved panel, and the outer shape is the same as that of the blade to be detected, and multiple coaxially distributed positioning marks are processed on both sides.

[0014] Further, each positioning mark includes a first mark and a second mark, and the distance between the first mark and the second mark is the same as the distance between the probe and the auxiliary aligner.

[0015] The above technical solutions of the present application have the following advantages: The dynamic coaxiality detection method for an ultrasonic scanning probe provided in the first aspect of the present application fixes a test block between a transmitting probe and a receiving probe. Multiple coaxially distributed positioning marks are machined on both sides of the test block. A scanning unit provides water spray coupling between the transmitting probe, the receiving probe, and the surface of the test block respectively to form a right water column and a left water column. The scanning unit moves the transmitting probe and the receiving probe to each selected position in the test block according to a given ultrasonic scanning trajectory. The dynamic coaxial alignment evaluation factor is determined based on the number of position points of the right water column and the left water column within the corresponding positioning marks in the test block and the total number of positioning marks, solving the problem that it is difficult to dynamically detect and quantitatively evaluate the dynamic coaxial alignment of the probe during the ultrasonic 3D scanning of complex blades in a real scenario, and improving the accuracy of ultrasonic 3D scanning detection and the comprehensive optimization efficiency of the equipment.

[0016] It can be understood that the beneficial effects of the second aspect above can be referred to the relevant descriptions in the first aspect above, and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the dynamic coaxiality detection device for the ultrasonic scanning probe provided by the present application; Figure 2 It is a distribution diagram of the calibration test block and the positioning marks provided by the present application; Figure 3 It is a schematic diagram of the dynamic coaxial alignment test provided by the present application.

[0019] Reference numerals: 1. Transmitting probe; 2. Receiving probe; 3. Calibration test block; 4. Right water column; 5. Left water column; 6. Scanning unit; 7. Ultrasonic and imaging unit; 8. Test block; 9. Right auxiliary aligner; 10. Left auxiliary aligner. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details from interfering with the description of the present application.

[0021] It should be understood that when used in the description of the present application specification and the appended claims, the term "comprising" indicates the presence of the described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their combinations.

[0022] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0023] The reference to "one embodiment" or "some embodiments" etc. described in the present application specification means that a specific feature, structure or characteristic described in connection with that embodiment is included in one or more embodiments of the present application. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "comprising", "including", "having" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in other ways. "A plurality" means "two or more".

[0024] The purpose of the present application is to address the requirements for the stability of the detection signal due to the coaxial alignment of the probe during the ultrasonic 3D automatic scanning of composite material blades and the current deficiencies. A method and device for dynamically detecting the coaxiality of an ultrasonic scanning probe are proposed to improve the ultrasonic 3D scanning detection effect of composite material blades, enhance the accuracy of ultrasonic 3D scanning detection of composite material blades and the reliability of detection results, reduce the risk of missed detection and misjudgment, and improve the comprehensive optimization efficiency of ultrasonic 3D detection equipment.

[0025] The following will further describe in detail the specific implementation manners of the present application in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application but are not used to limit the scope of the present application.

[0026] An embodiment of the present application provides a method for dynamically detecting the coaxiality of an ultrasonic scanning probe, which specifically includes the following steps: Fix a test block between the transmitting probe and the receiving probe. The test block is processed from a multi-curved panel made of a transparent material, and its shape is the same as that of the blade to be detected. A plurality of coaxially distributed positioning marks are processed on both sides respectively; Provide water spray coupling between the transmitting probe, the receiving probe and the surface of the test block through the scanning unit to form a right water column and a left water column; Move the transmitting probe and the receiving probe to each selected position in the test block according to a given ultrasonic scanning trajectory by the scanning unit; Determine the dynamic coaxial alignment evaluation factor according to the number of position points of the right water column and the left water column within the corresponding positioning marks in the test block and the total number of positioning marks.

[0027] In some embodiments, before fixing the test block between the transmitting probe and the receiving probe, it further includes: Calibrating the static coaxial alignment of the transmitting probe and the receiving probe using a calibration block. The calibration block is processed from a transparent material flat plate, and a plurality of coaxially distributed positioning marks are processed on both sides respectively.

[0028] In some embodiments, the step of calibrating the static coaxial alignment of the transmitting probe and the receiving probe using the calibration block includes: Fix the calibration block between the transmitting probe and the receiving probe; Provide water spray coupling between the transmitting probe, the receiving probe and the surface of the calibration block through the scanning unit to form a right water column and a left water column; Move the transmitting probe and the receiving probe to each calibration position in the calibration block according to a given ultrasonic scanning trajectory by the scanning unit; Complete the static coaxial alignment calibration according to the positioning marks of the calibration block and the ultrasonic transmission signals in the ultrasonic and imaging unit.

[0029] In some embodiments, a right auxiliary aligner is designed on the transmitting probe for outputting a right collimated laser cursor beam parallel to the transmitting probe; A left auxiliary aligner is designed on the receiving probe for outputting a left collimated laser cursor beam parallel to the receiving probe; Each positioning mark includes a first mark and a second mark, and the distance between the first mark and the second mark is the same as the distance between the probe and the auxiliary aligner.

[0030] In some embodiments, the step of completing the static coaxial alignment calibration according to the positioning marks of the calibration block and the ultrasonic transmission signals in the ultrasonic and imaging unit includes: Make the right water column be within the first mark on the right side of the calibration block, and the spot of the right collimated laser cursor beam be aligned with the center of the second mark on the right side of the calibration block; Make the left water column be within the first mark on the left side of the calibration block, and the spot of the left collimated laser cursor beam be aligned with the center of the second mark on the left side of the calibration block; When the fluctuation of the ultrasonic transmission signal in the ultrasonic and imaging unit meets the preset conditions, complete the static coaxial alignment calibration of the current calibration position.

[0031] In some embodiments, determining the dynamic coaxial alignment evaluation factor according to the number of position points of the right water column and the left water column within the corresponding positioning marks in the test block and the total number of positioning marks includes: recording the number of position points of the right water column and the left water column within the corresponding first marks in the test block, and the spots of the right collimated laser cursor beam and the left collimated laser cursor beam at the centers of the corresponding second marks in the test block; and determining the dynamic coaxial alignment evaluation factor according to the ratio between the number of position points and the total number of positioning marks.

[0032] In some embodiments, determining the dynamic coaxial alignment evaluation factor according to the ratio between the number of position points and the total number of positioning marks includes: if the ratio between the number of position points and the total number of positioning marks is greater than or equal to a first preset value, the dynamic coaxial alignment is evaluated as grade I; if the ratio between the number of position points and the total number of positioning marks is greater than or equal to a second preset value and less than the first preset value, the dynamic coaxial alignment is evaluated as grade II; if the ratio between the number of position points and the total number of positioning marks is greater than or equal to a third preset value and less than the second preset value, the dynamic coaxial alignment is evaluated as grade III; if the ratio between the number of position points and the total number of positioning marks is greater than or equal to a fourth preset value and less than the third preset value, the dynamic coaxial alignment is evaluated as grade IV; and if the ratio between the number of position points and the total number of positioning marks is less than the fourth preset value, the dynamic coaxial alignment is evaluated as grade V.

[0033] During the ultrasonic 3D scanning of composite material blades, in some ultrasonic 3D scanning devices and detection practices, a method for detecting and evaluating the coaxial alignment of the probe is to use measuring instruments to statically measure the coaxial alignment of the probe through mechanical measurement methods and evaluate the coaxial alignment of the probe based on the mechanical measurement results. Its main deficiencies are as follows: 1) This static measurement and evaluation method cannot obtain the dynamic coaxial alignment of the probe during the ultrasonic 3D automatic scanning process, making it difficult to grasp the synchronous alignment situation of the probe during the ultrasonic 3D automatic scanning process, thereby affecting the ultrasonic 3D automatic scanning effect and the accuracy of the detection results; 2) It is difficult to achieve the dynamic measurement of the coaxial alignment of the probe during the ultrasonic 3D automatic scanning at different spatial positions; 3) The measurement results are not directly related to the actual ultrasonic detection effect, resulting in the difficulty of effectively evaluating the coaxial alignment of the probe and optimizing the coaxial alignment based on the static measurement results, thereby affecting the accuracy and detection effect of the ultrasonic 3D scanning detection.

[0034] As a partial improvement, an evaluation method of ultrasonic signal fluctuation is adopted. Using a homogeneous material, such as a plexiglass plate, the coaxial alignment of the probe is indirectly evaluated by observing the fluctuation of the ultrasonic signal. Its main deficiencies are as follows: 1) The geometric features of the homogeneous material plate are completely different from those of the actual composite part to be detected. The results obtained are difficult to explicitly evaluate the coaxial alignment of the probe during the ultrasonic 3D scanning of the actual composite blade. 2) The relative position between the homogeneous material plate and the ultrasonic 3D scanning probe is fixed, making it difficult to reflect the dynamic coaxial alignment of the probe at different spatial positions in the actual scenario during the ultrasonic 3D scanning of the actual composite part. 3) During the measurement process, it is difficult to accurately observe the coaxial alignment of the probe. 4) There is a lack of a quantitative evaluation method and model for the dynamic coaxial alignment of the probe in the ultrasonic 3D scanning scenario of the actual composite blade to be detected. This has also been affecting the ultrasonic 3D automatic scanning detection effect and the accuracy of the detection results of the composite blade, and is not conducive to improving the ultrasonic 3D scanning detection effect of the composite part.

[0035] In view of the above deficiencies, this application is directed to the problem that the ultrasonic 3D scanning detection signal of a composite blade with a complex shape is affected by the coaxial alignment of the probe, and there is a lack of an effective method for detecting and quantitatively evaluating the dynamic coaxial alignment of the probe during ultrasonic 3D scanning. Based on the principles of 3D spatial kinematics and probability theory, a method and device for detecting the dynamic coaxiality of an ultrasonic scanning probe are proposed, which solves the problem that it is difficult to dynamically detect and quantitatively evaluate the dynamic coaxial alignment of the probe during the ultrasonic 3D scanning of a complex blade in a real scenario, thereby improving the ultrasonic 3D scanning detection effect of the complex composite blade and enhancing the accuracy of ultrasonic 3D scanning detection and the comprehensive optimization efficiency of the equipment.

[0036] The embodiment of this application also provides a device for detecting the dynamic coaxiality of an ultrasonic scanning probe, including a transmitting probe, a receiving probe, a calibration test block, a scanning unit, an ultrasonic and imaging unit, a test test block, a right auxiliary aligner, and a left auxiliary aligner; the device for detecting the dynamic coaxiality of the ultrasonic scanning probe is used to implement the method for detecting the dynamic coaxiality of the ultrasonic scanning probe as described above.

[0037] In some embodiments, the calibration test block is processed from a transparent material flat plate, and a plurality of coaxially distributed positioning marks are processed on both sides respectively; the test test block is processed from a transparent material multi-curved plate, and its shape is the same as that of the blade to be detected, and a plurality of coaxially distributed positioning marks are processed on both sides respectively.

[0038] In some embodiments, each positioning mark includes a first mark and a second mark, and the distance between the first mark and the second mark is the same as the distance between the probe and the auxiliary aligner.

[0039] The hardware principle composition for implementing the method for detecting the dynamic coaxiality of an ultrasonic 3D scanning probe is as Figure 1As shown in the figure, it mainly consists of a transmitting probe 1, a receiving probe 2, a calibration test block 3, a scanning unit 6, an ultrasonic and imaging unit 7, a test test block 8, a right auxiliary aligner 9, a left auxiliary aligner 10, etc. The transmitting probe 1 is used to transmit ultrasonic waves, and the receiving probe 2 is used to receive ultrasonic waves. The water coupling unit in the scanning unit 6 forms a right water column 4 and a left water column 5 through the transmitting probe 1 and the receiving probe 2 for ultrasonic acoustic coupling, and realizes the ultrasonic 3D scanning trajectory required for the dynamic test of the coaxial alignment of the transmitting probe 1 and the receiving probe 2 through the scanning unit 6 The ultrasonic and imaging unit 7 provides the ultrasonic emission signal for the dynamic test of the probe coaxial alignment and the ultrasonic transmission signal for display, recording and storage

[0040] The calibration test block 3 is used for static measurement and calibration of the coaxial alignment position of the transmitting probe 1 and the receiving probe 2. The calibration test block 3 is processed from a transparent material flat plate. As Figure 2 shown, on both sides of the calibration test block 3 in the thickness direction, "+" and "O" positioning marks are processed coaxially and equally spaced. The line width of the positioning marks is not less than 3 mm, and the inner diameter of the outer shape of the positioning marks is selected according to formula (1): (1) In the formula, is the diameter of the right water column 4 and the left water column 5, is the marking coefficient, which is determined through experiments. The positioning marks 1A and 1C correspond to the test position 1, the positioning marks 1B and 1D correspond to the test position 2, and so on. There are a total of 5 test positions on the calibration test block 3

[0041] As Figure 3 shown, the test test block 8 is used for dynamic measurement and evaluation of the coaxial alignment of the transmitting probe 1 and the receiving probe 2. The test test block 8 is processed from a transparent material multi-curved panel, and its outer shape reflects the geometric shape characteristics of the blade to be detected. On both sides of the test test block 8 in the thickness direction, "+" and "O" positioning marks are processed coaxially and equally spaced. The line width and the inner diameter of the outer shape of the positioning marks are the same as those of the test block 3, and the spacing of the positioning marks is selected according to formula (2):

[0042] (2) In the formula, is the shape coefficient, which is determined according to the shape complexity of the composite material blade and other parts to be detected and the ultrasonic 3D scanning test. The number of positioning marks is selected according to the shape complexity of the composite material blade and other parts to be detected, and satisfies 3]pieces

[0043] The spacing between the '+' and 'O' positioning marks in the vertical scanning direction is in accordance with Figure 2 and Figure 3 layout. For example, the spacing between the '+' mark 8A and the 'O' positioning mark 8C, and the spacing between the '+' mark 8B and the 'O' positioning mark 8D in the vertical scanning direction is selected to match the transmitting probe 1 and the right auxiliary aligner 9, the receiving probe 2 and the left auxiliary aligner 10. The positioning marks 8A and 8C correspond to the test position 1, and so on. There are test positions on the test block 8.

[0044] The right auxiliary aligner 9 is designed on the transmitting probe 1. The right auxiliary aligner 9 outputs a right collimated laser cursor beam 9A parallel to the transmitting probe 1, which is used to assist in observing whether the right water column 4 in the transmitting probe 1 is within the corresponding positioning mark range on the right side of the test block 8 and the calibration block 3. The left auxiliary aligner 10 is designed on the receiving probe 2. The left auxiliary aligner 10 outputs a left collimated laser cursor beam 10A parallel to the receiving probe 2, which is used to assist in observing whether the left water column 5 in the receiving probe 2 is within the corresponding positioning mark range on the left side of the test block 8 and the calibration block 3.

[0045] The installation positions of the right auxiliary aligner 9 and the left auxiliary aligner 10 ensure that when the spot of the right collimated laser cursor beam 9A is located at the center position of the corresponding '+' positioning mark on the right side in the calibration block 3, such as 1A, and the spot of the left collimated laser cursor beam 10A is located at the center position of the corresponding '+' positioning mark on the left side in the calibration block 3, such as 1A, at this time, the right water column 4 in the transmitting probe 1 is within the corresponding 'O' positioning mark on the right side, and the left water column 5 in the receiving probe 2 is within the corresponding 'O' positioning mark on the left side.

[0046] Calibration method for the static coaxial alignment of the transmitting probe 1 and the receiving probe 2: 1) According to the Figure 1 and Figure 2 positional relationship, fix the calibration block 3 between the transmitting probe 1 and the receiving probe 2. The water coupling units in the scanning unit 6 respectively provide water coupling between the probes and the surface of the calibration block 3, and form a right water column 4 and a left water column 5 that meet the test requirements for the coaxial alignment of the probes; 2) Move the transmitting probe 1 and the receiving probe 2 to position 1 in the calibration block 3 through the scanning unit 6 according to the given ultrasonic 3D scanning trajectory , until the following conditions are met: a) Place the right water column 4 inside the "O" positioning mark 1C on the right side of the calibration test block 3, align the spot of the right collimated laser cursor beam 9A with the center of the "+" cross positioning mark 1A on the right side of the calibration test block 3, place the left water column 5 inside the "O" positioning mark 1C on the left side of the calibration test block 3, and align the spot of the left collimated laser cursor beam 10A with the center of the "+" cross positioning mark 1A on the left side of the calibration test block 3; b) Observe the ultrasonic transmission signal in the ultrasonic and imaging unit 7 , indicating the th calibration point. When fluctuates and satisfies Equation (3), the static coaxial alignment test of the transmitting probe 1 and the receiving probe 2 at position 1 is completed. (3) Here, is determined by the ultrasonic 3D scanning test. When does not satisfy Equation (3), adjust the right auxiliary aligner 9, the left auxiliary aligner 10, and the right water column 4 and the left water column 5 until Equation (3) is satisfied.

[0047] 3) Move the transmitting probe 1 and the receiving probe 2 to positions 2, 3, 4, and 5 in the calibration test block 3 in sequence according to step 2). Move the transmitting probe 1 and the receiving probe 2 to each position and verify the calibration results in step 2) until the transmitting probe 1 and the receiving probe 2 satisfy the requirements of Equation (3) at each calibration position.

[0048] Dynamic coaxial alignment test method for the transmitting probe 1 and the receiving probe 2: 1) Fix the test block 8 between the transmitting probe 1 and the receiving probe 2 according to the Figure 1 and Figure 3 positional relationship. Provide water coupling through the water coupling unit in the scanning unit 6 between the probe and the surface of the test block 8 respectively, and form a right water column 4 and a left water column 5 that meet the requirements of the probe coaxial alignment test; 2) Move the transmitting probe 1 and the receiving probe 2 to each selected position in the test block 8 according to the given ultrasonic 3D scanning trajectory by the scanning unit 6, and record the number of position points where the right water column 4 and the left water column 5 are inside the corresponding "O" positioning marks in the test block 8 and the spots of the right collimated laser cursor beam 9A and the left collimated laser cursor beam 10A are at the centers of the corresponding "+" cross positioning marks in the test block 8 until the test is completed.

[0049] Dynamic coaxial alignment evaluation factor for the transmitting probe 1 and the receiving probe 2 Calculation: Calculate the evaluation factor of the dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2 according to the model of formula (4). : (4) Evaluate and classify the dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2 according to the following classification model: 1) , rated as Grade I: The dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2 is accurate; 2) , rated as Grade II: The dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2 is relatively accurate; 3) , rated as Grade III: The dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2 is relatively inaccurate; 4) , rated as Grade IV: The dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2 is inaccurate; 5) , rated as Grade V: The dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2 is extremely inaccurate.

[0050] Based on the evaluation results of the dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2, give in turn: 1) Use directly, 2) Can be used, 3) Use after optimization, 4) Use after re-detection and evaluation meet the requirements after improvement, 5) Cannot be used. When the dynamic coaxial alignment of the transmitting probe 1 and the receiving probe 2 is evaluated as Grade IV and Grade V, it is necessary to comprehensively optimize the ultrasonic 3D scanning detection system.

[0051] In this application, the ultrasonic 3D scanning detection signal and detection results of composite material blades strongly depend on the influence of the probe coaxial alignment. At present, there is a lack of detection methods, test blocks, devices and quantitative evaluation methods for the probe coaxial alignment, etc. Based on the principles of three-dimensional space science and probability, in the ultrasonic 3D automatic scanning real machine environment, a multi-factor fusion detection and evaluation principle that does not rely on special measuring instruments is adopted, and a method and device for detecting the dynamic coaxiality of ultrasonic scanning probes are proposed, which solves the problem that it is difficult to dynamically detect and quantitatively evaluate the dynamic coaxial alignment of the probe during the ultrasonic 3D scanning process of complex blades in the real scene, thereby improving the ultrasonic 3D scanning detection effect of complex composite material blades, which is very helpful to improve the accuracy of ultrasonic 3D scanning detection results and the ability to detect defects, and guides the efficient comprehensive design and optimization of ultrasonic 3D detection equipment for high-end composite parts.

[0052] The MUI-31R ultrasonic 3D scanning detection system of AVIC Composite Materials Co., Ltd. was selected. According to the dynamic coaxiality detection method and device of the ultrasonic scanning probe in this application, a calibration test block 3 with 5 marking position points and a test test block 8 with 100 calibration points were prepared for an 800mm long complex composite blade. 、 , using the ultrasonic 3D scanning trajectory generated by MUI-31R ,choose , the dynamic coaxial alignment of the ultrasonic 3D scanning probe was tested on the selected complex composite material blades, and based on the test results obtained, the dynamic coaxial alignment of the probe in this application was evaluated.

[0053] Before optimization: exist hour, It is approximately 81% and 83%, distributed between 85%% and 95%. The dynamic coaxial alignment of the probe meets the Level III requirements. The dynamic coaxial alignment of the probe is at a relatively inaccurate level. The ultrasonic 3D scanning detection imaging quality shows a lot of interference, resulting in unsatisfactory actual detection results.

[0054] After optimization: Based on the above-mentioned dynamic coaxial alignment evaluation results and classification, the ultrasonic 3D scanning detection system was comprehensively optimized. hour, The accuracy rates all reached above 98%, the dynamic coaxial alignment of the probe met the Level I requirements, and the dynamic coaxial alignment of the probe was at the accurate level. The imaging quality of ultrasonic 3D scanning inspection was significantly improved, with no obvious interference displayed. This significantly improved the ultrasonic 3D scanning inspection effect of complex composite material blades, the visual inspection imaging quality, the defect detection capability, and the accuracy of the inspection results.

[0055] It should be noted that the information interaction, execution process, etc. between the above-mentioned modules / units are based on the same concept as the method embodiment of this application. Their specific functions and technical effects can be found in the method embodiment section and will not be repeated here.

[0056] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated here.

[0057] The above-mentioned embodiments are only used to illustrate the technical solutions of this application and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of this application and should all be included in the protection scope of this application.

Claims

1. A method for detecting the dynamic coaxiality of an ultrasonic scanning probe, characterized in that Including: Fix the test block between the transmitting probe and the receiving probe. The test block is processed from a multi-curved panel of transparent material and has the same shape as the blade to be detected. A plurality of coaxially distributed positioning marks are processed on both sides respectively; Provide water spray coupling between the transmitting probe, the receiving probe and the surface of the test block respectively through the scanning unit to form a right water column and a left water column; Move the transmitting probe and the receiving probe to each selected position in the test block according to a given ultrasonic scanning trajectory through the scanning unit; Determine the dynamic coaxial alignment evaluation factor according to the number of position points of the right water column and the left water column within the corresponding positioning marks in the test block and the total number of positioning marks.

2. The dynamic coaxiality detection method for an ultrasonic scanning probe according to claim 1, wherein Before fixing the test block between the transmitting probe and the receiving probe, it further includes: Calibrate the static coaxial alignment of the transmitting probe and the receiving probe using a calibration block. The calibration block is processed from a flat plate of transparent material, and a plurality of coaxially distributed positioning marks are processed on both sides respectively.

3. The dynamic coaxiality detection method of the ultrasonic scanning probe according to claim 2, characterized in that The calibrating the static coaxial alignment of the transmitting probe and the receiving probe using the calibration block includes: Fix the calibration block between the transmitting probe and the receiving probe; Provide water spray coupling between the transmitting probe, the receiving probe and the surface of the calibration block respectively through the scanning unit to form a right water column and a left water column; Move the transmitting probe and the receiving probe to each calibration position in the calibration block according to a given ultrasonic scanning trajectory through the scanning unit; Complete the static coaxial alignment calibration according to the positioning marks of the calibration block and the ultrasonic transmission signal in the ultrasonic and imaging unit.

4. The dynamic coaxiality detection method of an ultrasonic scanning probe according to claim 3, wherein A right auxiliary aligner is designed on the transmitting probe for outputting a right collimated laser cursor beam parallel to the transmitting probe; a left auxiliary aligner is designed on the receiving probe for outputting a left collimated laser cursor beam parallel to the receiving probe; Each positioning mark includes a first mark and a second mark, and the distance between the first mark and the second mark is the same as the distance between the probe and the auxiliary aligner.

5. The method for detecting the dynamic coaxiality of an ultrasonic scanning probe according to claim 4, wherein The completing the static coaxial alignment calibration according to the positioning marks of the calibration block and the ultrasonic transmission signal in the ultrasonic and imaging unit includes: Make the right water column be within the first mark on the right side of the calibration block, and the spot of the right collimated laser cursor beam be aligned with the center of the second mark on the right side of the calibration block; Make the left water column be within the first mark on the left side of the calibration block, and the spot of the left collimated laser cursor beam be aligned with the center of the second mark on the left side of the calibration block; When the fluctuation of the ultrasonic transmission signal in the ultrasonic and imaging unit meets the preset condition, complete the static coaxial alignment calibration at the current calibration position.

6. The dynamic coaxiality detection method of the ultrasonic scanning probe according to claim 4, characterized in that The determining the dynamic coaxial alignment evaluation factor according to the number of position points of the right water column and the left water column within the corresponding positioning marks in the test block and the total number of positioning marks includes: Record the number of position points where the right water column and the left water column are within the corresponding first marks in the test block, and the spots of the right collimated laser cursor beam and the left collimated laser cursor beam are aligned with the centers of the corresponding second marks in the test block; Determine the dynamic coaxial alignment evaluation factor according to the ratio between the number of position points and the total number of positioning marks.

7. The dynamic coaxiality detection method for an ultrasonic scanning probe according to claim 6, characterized in that, Determining a dynamic coaxial alignment evaluation factor according to the ratio between the number of position points and the total number of positioning marks includes: If the ratio between the number of position points and the total number of positioning marks is greater than or equal to a first preset value, the dynamic coaxial alignment is rated as grade I; If the ratio between the number of position points and the total number of positioning marks is greater than or equal to a second preset value and less than the first preset value, the dynamic coaxial alignment is rated as grade II; If the ratio between the number of position points and the total number of positioning marks is greater than or equal to a third preset value and less than the second preset value, the dynamic coaxial alignment is rated as grade III; If the ratio between the number of position points and the total number of positioning marks is greater than or equal to a fourth preset value and less than the third preset value, the dynamic coaxial alignment is rated as grade IV; If the ratio between the number of position points and the total number of positioning marks is less than the fourth preset value, the dynamic coaxial alignment is rated as grade V.

8. An ultrasonic scanning probe dynamic coaxiality detection device, characterized in that, Including a transmitting probe, a receiving probe, a calibration test block, a scanning unit, an ultrasonic and imaging unit, a test test block, a right auxiliary aligner, and a left auxiliary aligner; The ultrasonic scanning probe dynamic coaxiality detection device is used to implement the ultrasonic scanning probe dynamic coaxiality detection method according to any one of claims 1 to 7.

9. The dynamic coaxiality detection device for an ultrasonic scanning probe according to claim 8, characterized in that, The calibration test block is processed from a transparent material flat plate, and a plurality of coaxially distributed positioning marks are processed on both sides respectively; The test test block is processed from a transparent material multi-curved panel, and the outer shape is the same as that of the blade to be detected, and a plurality of coaxially distributed positioning marks are processed on both sides respectively.

10. The dynamic coaxiality detection device for an ultrasonic scanning probe according to claim 9, characterized in that, Each positioning mark includes a first mark and a second mark, and the distance between the first mark and the second mark is the same as the distance between the probe and the auxiliary aligner.

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