Air coupling ultrasonic detection method and device, storage medium and electronic equipment
By pasting tape on the edge of the part to be inspected and removing air bubbles, the problem of edge blind spots in air-coupled ultrasonic detection is solved, and the accuracy and reliability of the detection are improved.
Patent Information
- Application Number
- CN202510173084.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-17
- Publication Date
- 2025-05-06
AI Technical Summary
Air-coupled ultrasonic detection has challenges in signal processing and signal quality, especially in the edge areas of the parts to be inspected, which leads to inaccurate detection results.
Stick tape with preset tape specifications at the edge of the part to be inspected to make the tape extend beyond the edge of the part to be inspected to reach the preset threshold, and eliminate the bubbles at the sticking of the tape and the part to be inspected to block the side lobes of the probe and obtain more accurate detection results.
By reducing the edge blind spots in air-coupled ultrasound detection, the reliability and accuracy of the detection are improved, ensuring an accurate assessment of internal defects and structural safety of the inspected parts.
Smart Images
Figure CN119936196A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of nondestructive testing technology, and in particular to an air-coupled ultrasonic testing method, device, storage medium and electronic equipment. Background Art
[0002] Air-coupled ultrasonic testing is a widely used method in the field of non-destructive testing, especially in the integrity assessment of materials and structures. The main advantage of this technology is its non-contact detection method, which gives it significant advantages in certain special environments. However, in actual application, air-coupled ultrasonic testing has some challenges, especially in signal processing and signal quality.
[0003] When performing through-type air-coupled ultrasonic testing, the signal gain is large, resulting in a significant enhancement of the sidelobe effect of the sound field. This sidelobe phenomenon will increase the system's sensitivity to the environment around the test piece, so that when the probe approaches the edge of the test piece, the strength of the ultrasonic signal bypassing the test piece will increase rapidly. This signal enhancement will not only affect the accuracy of the ultrasonic signal, but may also mask the penetration signal of the test piece.
[0004] Due to this phenomenon, blind spots may appear in the edge area of the inspected part, resulting in inaccurate test results. This not only affects the ability to identify internal defects of the inspected part, but may also lead to incorrect assessments of structural safety. Therefore, how to reduce the edge blind spots of air-coupled ultrasonic testing has become a technical problem that technicians in this field need to solve urgently. Summary of the invention
[0005] In view of the above problems, the present invention provides an air-coupled ultrasonic detection method, device, storage medium and electronic device that overcome the above problems or at least partially solve the above problems. The technical solution is as follows:
[0006] An air-coupled ultrasonic detection method, comprising:
[0007] Pasting a tape of preset tape specifications on the edge of the object to be inspected, so that the extension length of the tape beyond the edge of the object to be inspected reaches a preset threshold, wherein the preset tape specifications and the preset threshold are related to the material properties of the object to be inspected;
[0008] Remove air bubbles from the adhesive tape and the inspected object so that there is no air layer between the adhesive tape and the inspected object;
[0009] When performing air-coupled ultrasonic C-scan detection on the object to be detected, the side lobes of the probe are shielded by adhesive tape attached to the edge of the object to be detected, so as to obtain the air-coupled ultrasonic detection result of the object to be detected.
[0010] Optionally, before sticking a tape with preset size parameters on the edge of the object to be inspected, the method further includes:
[0011] Pasting a tape of a first tape specification on a partial area of the upper surface of the object to be inspected;
[0012] Compare the A-scan waveform results of the partial area of the upper surface before and after pasting the tape of the first tape specification; if the change in the peak value of the transmission wave in the A-scan waveform result is less than a preset peak threshold, confirm the first tape specification as the preset tape specification; if the change in the peak value of the transmission wave in the A-scan waveform result is greater than or equal to the preset peak threshold, use the second tape specification as the first tape specification, and return to execute the step of pasting the tape of the first tape specification on the partial area of the upper surface of the inspected object.
[0013] Optionally, the preset peak threshold is 2 decibels.
[0014] Optionally, sticking a tape of preset tape specifications on the edge of the object to be inspected includes:
[0015] Adhesive tapes of preset tape specifications are respectively pasted on the upper and lower edges of the object to be inspected.
[0016] Optionally, before performing air-coupled ultrasonic C-scan testing on the object to be tested, the method further includes:
[0017] In the case where the inspected piece has a through hole, the tape of the preset tape specification is pasted on the upper and lower sides of the through hole so that the tape covers the through hole.
[0018] Optionally, the preset tape specifications include the thickness, length, width, material and adhesive properties of the tape.
[0019] Optionally, the thickness is below 0.2 mm, the material includes paper, polymer transparent material and opaque material, and the adhesive feature includes single-sided adhesive tape and double-sided adhesive tape.
[0020] An air-coupled ultrasonic testing device comprises: a tape sticking unit, a bubble removing unit and a testing result obtaining unit.
[0021] The tape sticking unit is used to stick a tape of preset tape specifications on the edge of the inspected object so that the extension length of the tape beyond the edge of the inspected object reaches a preset threshold, wherein the preset tape specifications and the preset threshold are related to the material characteristics of the inspected object;
[0022] The bubble removal unit is used to remove bubbles at the adhesion between the tape and the object to be inspected, so that there is no air layer between the tape and the object to be inspected;
[0023] The detection result obtaining unit is used to obtain the air-coupled ultrasonic detection result of the test piece by blocking the side lobe of the probe by sticking tape on the edge of the test piece when performing air-coupled ultrasonic C-scan detection on the test piece.
[0024] A computer-readable storage medium stores a program, and when the program is executed by a processor, the air-coupled ultrasonic detection method is implemented.
[0025] An electronic device comprises at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other via the bus; and the processor is used to call program instructions in the memory to execute the air-coupled ultrasonic detection method.
[0026] By means of the above technical scheme, the air-coupled ultrasonic detection method, device, storage medium and electronic device provided by the present invention paste a tape of preset tape specifications on the edge of the test piece, so that the extension length of the tape beyond the edge of the test piece reaches a preset threshold value, wherein the preset tape specifications and the preset threshold value are related to the material properties of the test piece; remove bubbles at the point where the tape and the test piece are pasted, so that there is no air layer between the tape and the test piece; when performing air-coupled ultrasonic C-scan detection on the test piece, the side lobes of the probe are blocked by the tape pasted on the edge of the test piece, so as to obtain the air-coupled ultrasonic detection result of the test piece. The present invention utilizes the characteristic that air-coupled ultrasonic waves are insensitive to firmly pasted tapes, and by firmly pasting tapes on the edge of the test piece, the side lobes of the probe are successfully blocked, thereby effectively reducing the edge blind area in air-coupled ultrasonic detection, thereby improving the reliability and accuracy of air-coupled ultrasonic detection.
[0027] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0029] Figure 1 A schematic diagram illustrating a method of sticking a test piece and an adhesive tape provided in an embodiment of the present invention is shown;
[0030] Figure 2A schematic diagram showing a flow chart of an implementation of an air-coupled ultrasonic detection method provided in an embodiment of the present invention;
[0031] Figure 3 A schematic diagram illustrating another method of sticking the object to be inspected and the adhesive tape provided in an embodiment of the present invention is shown;
[0032] Figure 4 A schematic diagram illustrating another method of sticking the object to be inspected and the adhesive tape provided in an embodiment of the present invention is shown;
[0033] Figure 5 A schematic diagram of the structure of an air-coupled ultrasonic detection device provided in an embodiment of the present invention is shown;
[0034] Figure 6 A schematic structural diagram of an electronic device provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION
[0035] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.
[0036] In traditional ultrasonic testing methods, tape is usually pasted on the surface of the test piece as a pre-defect treatment, but this will affect the test results. In contrast, the applicant of the present invention has shown through experiments that in air-coupled ultrasonic testing, a thin layer of tape with a thickness of less than 0.2 mm pasted on the surface has a very limited impact on the test results. As long as the thin layer of tape is well adhered to the material to be tested and there is no air layer, the presence of the tape will not cause significant interference to the test results of air-coupled ultrasound.
[0037] Based on this, the core principle of the present invention is to utilize the property that air-coupled ultrasonic waves are insensitive to firmly attached tape. By firmly sticking tape on the edge of the test piece to successfully block the side lobes of the probe, the edge blind area in air-coupled ultrasonic testing is effectively reduced, thereby improving the reliability and accuracy of air-coupled ultrasonic testing.
[0038] refer to Figure 1 , Figure 1The figure shows a schematic diagram of a method of pasting the test piece and the tape provided by an embodiment of the present invention. By pasting the tape on the edge of the test piece, the present invention effectively blocks the ultrasonic signal that bypasses the edge of the test piece. This method avoids the tediousness of remaking the shielding object for each size and shape of the test piece, and is easy to operate in practical applications. In addition, due to the characteristics of the tape, the impact of the area where the tape is pasted is minimized, ensuring that the ultrasonic signal of the test piece is accurately acquired. Therefore, the present invention reduces the edge blind area without affecting the overall detection results, and significantly improves the effectiveness and reliability of air-coupled ultrasonic detection.
[0039] like Figure 2 As shown, a flow chart of an implementation of an air-coupled ultrasonic detection method provided by an embodiment of the present invention is provided. The method may include:
[0040] S200, sticking a tape of preset tape specifications on the edge of the object to be inspected so that the extension length of the tape beyond the edge of the object to be inspected reaches a preset threshold, wherein the preset tape specifications and the preset threshold are related to the material properties of the object to be inspected.
[0041] The object to be tested refers to an object that needs to be tested by air-coupled ultrasonic testing, which can be a structure or component made of various materials, such as metal, composite material or plastic.
[0042] Among them, the tape specifications include parameters such as tape thickness, length, width, material and adhesive properties. The choice of tape specifications directly affects the adhesive effect of the tape on the edge of the test piece. In order to achieve effective sidelobe shielding, the thickness of the tape is usually required to be within a certain range to reduce the impact on the ultrasonic signal. At the same time, the width of the tape needs to be large enough to ensure that its extension length beyond the edge of the test piece reaches a preset threshold, so that the sidelobe signal of the ultrasonic wave can be effectively shielded.
[0043] Optionally, the thickness is less than 0.2 mm. Since the thickness of the tape is controlled below 0.2 mm, its effect on the ultrasonic wave is minimal, and the propagation characteristics of the ultrasonic wave signal are maintained. This design ensures that the presence of the tape will not significantly interfere with the signal of the air-coupled ultrasonic detection, ensuring the accuracy of the detection results. Specifically, the thickness of the tape can be selected between 0.01 mm and 0.2 mm.
[0044] Optional materials include paper, polymer transparent materials and opaque materials.
[0045] Paper tape and polymer tape (either transparent or opaque) have better acoustic compatibility than cloth tape and metal tape. They can effectively transmit ultrasonic signals, reduce interference with signal propagation, and ensure signal quality during detection. Due to its complex structure, cloth tape may cause unnecessary reflection and attenuation of the signal, while metal tape may reflect ultrasonic waves and seriously interfere with the detection results. At the same time, the thickness of paper tape and polymer tape is usually thin (for example, controlled below 0.2 mm), which can meet the requirements of shielding side lobes without significantly affecting the propagation of ultrasonic waves. The thickness of cloth tape and metal tape is often large, which may cause signal attenuation or reflection, affecting the accuracy of detection. In addition, paper tape and polymer tape are usually low-cost and easy to obtain, which meets the economic requirements of industrial applications. Cloth tape and metal tape are expensive in some cases and do not meet economic considerations.
[0046] Optionally, the adhesive feature includes single-sided adhesive tape and double-sided adhesive tape. In the embodiment of the present invention, single-sided adhesive tape or double-sided adhesive tape can be selected based on comprehensive consideration of factors such as material properties of the inspected object, operating environment, inspection requirements, and adhesive effect.
[0047] Among them, material properties mainly refer to the acoustic properties of the material used for the test piece, including parameters such as sound velocity, density and impedance. The material used for the test piece can be porous materials such as ceramic-based composites, bulletproof fibers and foams, or non-porous materials such as resin-based composites and thin metal plates. The selection of preset tape specifications and extension thresholds must take into account the material properties of the test piece to ensure that the sticking of the tape will not have a negative impact on the propagation of ultrasonic waves. Therefore, for different materials, the type and specifications of the tape may need to be adjusted to ensure its adaptability and effectiveness.
[0048] The preset threshold is greater than the focal spot diameter of the ultrasonic probe.
[0049] S210, remove the bubbles at the place where the tape and the inspected object are attached, so that there is no air layer between the tape and the inspected object.
[0050] To ensure that there is no air layer between the tape and the test piece, a hard object can be used to scrape and press the adhesive area between the tape and the test piece to effectively remove the bubbles between the two, thereby avoiding the tape part being mistakenly identified as delamination during air-coupled ultrasonic C-scan testing.
[0051] Optionally, an embodiment of the present invention may use an automatic scraping and pressing mechanical device. After the tape is pasted, the contact surface between the tape and the workpiece to be inspected is evenly scraped and pressed by vibration or pressure to remove bubbles. Vacuum adsorption technology may also be used to place the workpiece to be inspected on a vacuum table to form negative pressure during the tape pasting process, which helps to suck away the air between the contact surfaces and thus reduce the formation of bubbles. Ultrasonic vibration may also be used to apply high-frequency ultrasound during the contact between the tape and the workpiece to be inspected, which can reduce the adhesion between the pasted surfaces and help bubbles escape, thereby achieving a tighter fit.
[0052] Furthermore, the embodiment of the present invention can compare the A-scan waveform results of the adhesive tape and the test piece before and after the adhesive tape is pasted. If the change in the transmission wave peak value in the A-scan waveform result is less than a preset wave peak threshold, it is confirmed that the bubbles in the adhesive tape and the test piece have been eliminated. If the change in the transmission wave peak value in the A-scan waveform result is greater than or equal to the preset wave peak threshold, it is confirmed that bubbles exist in the adhesive tape and the test piece and have not been eliminated.
[0053] S220 , when performing air-coupled ultrasonic C-scan testing on the object to be tested, the side lobes of the probe are shielded by adhesive tape attached to the edge of the object to be tested, so as to obtain air-coupled ultrasonic testing results of the object to be tested.
[0054] Among them, air-coupled ultrasonic C-scan testing is used to evaluate the internal defects and structural integrity of materials. Air-coupled ultrasonic C-scan testing mainly transmits ultrasonic signals through the air to the test piece, and uses the reflection and transmission characteristics of ultrasonic waves to obtain the internal information of the test piece. C-scan visualizes the test results to form a two-dimensional image, showing the signal intensity distribution of the test piece at different depths, which is convenient for analyzing and identifying potential defects.
[0055] The probe is a key component in the ultrasonic testing system, and its main function is to generate and receive ultrasonic signals. In air-coupled ultrasonic testing, the probe transmits ultrasonic signals into the test piece and receives signals reflected from the inside of the test piece.
[0056] Among them, side lobes refer to additional signals generated in addition to the main lobe when the ultrasonic probe transmits or receives signals. These side lobes will be excited at angles other than the main direction of the probe, which may cause noise or misjudgment in the test results. In air-coupled ultrasonic testing, side lobe signals may interfere with the acquisition of true information about the test piece. Therefore, by sticking tape on the edge of the test piece, the side lobes of the probe can be effectively blocked, making the main signal more prominent, thereby improving the accuracy and reliability of the test results. Side lobes are sound fields, and they can be blocked with solids, just like the method of blocking the propagation of sound waves.
[0057] The air-coupled ultrasonic detection method provided by the present invention comprises: pasting a tape of preset tape specifications on the edge of the test piece, so that the extension length of the tape beyond the edge of the test piece reaches a preset threshold value, wherein the preset tape specifications and the preset threshold value are related to the material properties of the test piece; removing bubbles at the place where the tape and the test piece are pasted, so that there is no air layer between the tape and the test piece; when performing air-coupled ultrasonic C-scan detection on the test piece, the side lobes of the probe are blocked by the tape pasted on the edge of the test piece, so as to obtain the air-coupled ultrasonic detection result of the test piece. The present invention utilizes the characteristic that air-coupled ultrasonic waves are insensitive to firmly pasted tapes, and by firmly pasting the tape on the edge of the test piece, the side lobes of the probe are successfully blocked, thereby effectively reducing the edge blind area in air-coupled ultrasonic detection, thereby improving the reliability and accuracy of air-coupled ultrasonic detection.
[0058] Optional, in the above Figure 2 On the basis of one or more corresponding embodiments, in another optional embodiment provided by the embodiment of the present invention, before pasting a tape with preset size parameters on the edge of the inspected object, the method may further include:
[0059] Paste a tape of the first tape specification on a portion of the upper surface of the object to be inspected. Compare the A-scan waveform results of the portion of the upper surface before and after pasting the tape of the first tape specification. If the change in the peak value of the transmission wave in the A-scan waveform result is less than the preset peak threshold, the first tape specification is confirmed as the preset tape specification. If the change in the peak value of the transmission wave in the A-scan waveform result is greater than or equal to the preset peak threshold, the second tape specification is used as the first tape specification, and return to the step of pasting the tape of the first tape specification on the portion of the upper surface of the object to be inspected.
[0060] Among them, A-scan (Amplitude Scan) refers to transmitting ultrasonic signals through an ultrasonic probe, receiving signals reflected from the inside of the test object, converting them into electrical signals and displaying them in the form of waveforms. In the A-scan graph, the horizontal axis usually represents time (or depth) and the vertical axis represents the intensity (amplitude) of the signal.
[0061] After the first tape is pasted, the embodiment of the present invention compares the A-scan waveform results before and after the tape is pasted, that is, analyzes the changes in the ultrasonic transmission wave caused by the pasting of the tape to determine whether the pasted tape meets the preset specifications. In the A-scan waveform, the transmission wave peak represents the signal strength of the ultrasonic wave after passing through the test piece and the tape. The characteristics of the tape will affect the intensity and shape of the transmission wave. Then, the change in the transmission wave peak is judged by the preset peak threshold. If the change in the transmission wave peak in the A-scan waveform result is less than this threshold, it means that the tape of the first tape specification will not significantly affect the propagation characteristics of the ultrasonic wave, so it can be confirmed as the preset tape specification. If the peak value changes greatly, it means that the tape of the first tape specification has a more significant effect on the ultrasonic wave, and at this time, the second tape specification needs to be tried as the first tape specification. This means that the first tape specification may not be suitable for the current detection requirements, so returning to the step of pasting the first tape specification, it may be necessary to reselect or adjust the tape specification.
[0062] For ease of understanding, an example is given here to illustrate: the embodiment of the present invention can firmly stick a layer of tape with a thickness of t, a length of c, and a width of d on a part of the upper surface of the test piece to ensure that there is no air layer between the tape and the raw material of the test block. Subsequently, the A-scan waveform results obtained by the air-coupled ultrasonic detection system at the same position before and after the tape is pasted are compared. In this process, if the peak value change of the transmitted wave in the A-scan waveform is less than 2dB, the tape can be confirmed as a suitable tape specification; if the change in the peak value of the transmitted wave is greater than or equal to 2dB, it is necessary to consider using a thinner tape or changing the material of the tape to ensure the accuracy of the detection effect.
[0063] The embodiment of the present invention confirms the tape specifications by analyzing the ultrasonic A-scan waveform results to compare the peak changes before and after the tape is pasted to judge the applicability of the tape, thereby ensuring that the tape specifications used can effectively support ultrasonic testing and avoid inaccurate test results caused by mismatched tape characteristics, thereby ensuring the reliability and effectiveness of air-coupled ultrasonic testing.
[0064] Optionally, the preset peak threshold is 2 decibels. The embodiment of the present invention selects 2 decibels as the preset peak threshold, which can accurately identify whether the impact of the current tape specifications on ultrasonic transmission exceeds an acceptable range, thereby facilitating timely adjustment of the tape selection and ensuring the effectiveness of ultrasonic detection.
[0065] Optional, in the above Figure 2 On the basis of one or more corresponding embodiments, in another optional embodiment provided by the embodiment of the present invention, sticking a tape of a preset tape specification on the edge of the object to be inspected may specifically include:
[0066] Adhesive tapes of preset tape specifications are respectively pasted on the upper and lower edges of the object to be inspected.
[0067] refer to Figure 3 , Figure 3 The figure shows another method of pasting the inspection object and the tape provided by the embodiment of the present invention. In the embodiment of the present invention, the tape of preset tape specifications is pasted on the upper edge and the lower edge of the inspection object respectively, aiming to further enhance the shielding effect and reduce the edge blind area. By pasting a layer of tape on the upper and lower edges of the inspection object, two layers of tape and an air layer between them are formed, and this structure can significantly improve the shielding effect.
[0068] Specifically, when air-coupled ultrasound penetrates two layers of tape, it needs to pass through the interface between air and the first layer of tape, the interface between the first layer of tape and air, the interface between air and the second layer of tape, and the interface between the second layer of tape and air in sequence. Since air-coupled ultrasound will be almost completely reflected when entering solid materials, the reflection characteristics of the first and third interfaces will be significantly enhanced among the above four interfaces, thereby greatly improving the shielding effect of ultrasound, thereby effectively reducing the edge blind area and improving the accuracy and reliability of detection.
[0069] Optional, in the above Figure 2 On the basis of one or more corresponding embodiments, in another optional embodiment provided by the embodiment of the present invention, before performing air-coupled ultrasonic C-scan detection on the object to be inspected, the method may further include:
[0070] In the case where the inspected piece has a through hole, adhesive tapes of a preset tape specification are pasted on the upper and lower sides of the through hole so that the adhesive tape covers the through hole.
[0071] refer to Figure 4 , Figure 4 The figure shows another method of pasting the test piece and the tape provided by the embodiment of the present invention. In the embodiment of the present invention, when there is a through hole in the test piece, the tape of the preset tape specification should be pasted on the upper and lower sides of the through hole to ensure that the tape can effectively cover the through hole. This operation can effectively reduce the blind area caused by the through hole and improve the overall accuracy and reliability of ultrasonic testing. By covering the through hole, the interference with the test results can be reduced, ensuring the smooth progress of the test process.
[0072] In order to facilitate the understanding of the overall implementation process of this scheme, the following examples are given using ceramic matrix composite plate, bulletproof fiberboard and composite blade as the test pieces, combined with the test results:
[0073] For the ceramic-based composite material flat plate, first, the embodiment of the present invention can paste a single-sided adhesive paper tape with a thickness of 0.05 mm, a length of 10 mm, and a width of 10 mm on a partial area of the surface of the ceramic-based composite material flat plate. Make sure that there is no air layer between the tape and the material. By comparing the A-scan waveforms before and after the tape is attached, it is found that the peak value of the transmission wave changes by 1.8 dB, indicating that the selected tape meets the requirements. Next, paste a portion of the tape on the upper and lower edges of the ceramic-based composite material flat plate, with the tape hanging 30 mm out of the edge. Use fingernails to scrape and press when pasting to ensure that bubbles between the tape and the flat plate are eliminated. For the through holes on the flat plate, both sides also need to be pasted with the above-mentioned tape to close the through holes. Finally, perform air-coupled ultrasonic C-scan inspection on the ceramic-based composite material flat plate according to the standard operating procedures.
[0074] For bulletproof fiberboard, first, the embodiment of the present invention can paste a double-sided adhesive polymer transparent tape with a thickness of 0.08mm, a length of 20mm, and a width of 20mm on a partial area of the surface of the bulletproof fiberboard to ensure that there is no air layer between the tape and the material. By comparing the A-scan waveforms before and after the tape is attached, it is obtained that the peak value of the transmission wave changes by 1.5dB, and the selected tape meets the requirements. Next, the tape is pasted on the surface edge of the bulletproof fiberboard, and the tape is suspended 35mm from the edge. Use a utility knife to scrape and press when pasting to remove bubbles between the tape and the plate. Finally, perform air-coupled ultrasonic C-scan inspection on the ceramic-based composite material flat plate according to the standard operating procedure.
[0075] For composite blades, first, the embodiment of the present invention can paste a double-sided adhesive polymer transparent tape with a thickness of 0.04mm, a length of 5mm, and a width of 5mm on a partial area of the surface of the composite blade. Make sure there is no air layer between the tape and the material. By comparing the A-scan waveforms before and after the tape is attached, it is found that the peak value of the transmission wave changes by 1.2dB, and the selected tape meets the requirements. Next, paste the tape portion on the upper and lower surfaces of the composite blade, with the tape hanging 20mm out of the edge. Use a utility knife to scrape and press when pasting to ensure that bubbles between the tape and the blade are removed. Finally, perform air-coupled ultrasonic C-scan inspection on the ceramic-based composite plate according to standard operating procedures.
[0076] In the process of testing different materials, the embodiment of the present invention can select appropriate tape and effectively stick it to reduce the edge blind area in ultrasonic testing and ensure the accuracy of the test results. Compared with other shielding technologies, the embodiment of the present invention has the advantages of flexible use and low cost. By significantly reducing the edge blind area in air-coupled ultrasonic testing without affecting the detection of the tape sticking area, the accuracy and reliability of the detection are improved.
[0077] Although operations are depicted in a particular order, this should not be understood as requiring that the operations be performed in the particular order shown or in a sequential order.Multitasking and parallel processing may be advantageous under certain circumstances.
[0078] It should be understood that the various steps described in the method embodiments of the present invention may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present invention is not limited in this respect.
[0079] Corresponding to the above method embodiment, the embodiment of the present invention also provides an air-coupled ultrasonic detection device, whose structure is as follows: Figure 5 As shown, it may include: a tape sticking unit 10, a bubble removing unit 20 and a detection result obtaining unit 30.
[0080] The tape sticking unit 10 is used to stick a tape of preset tape specifications on the edge of the inspected object so that the extension length of the tape beyond the edge of the inspected object reaches a preset threshold, wherein the preset tape specifications and the preset threshold are related to the material properties of the inspected object.
[0081] The bubble removal unit 20 is used to remove bubbles at the adhesive tape and the inspected object so that there is no air layer between the adhesive tape and the inspected object.
[0082] The test result obtaining unit 30 is used to obtain the air-coupled ultrasonic test result of the test piece by shielding the side lobe of the probe by sticking a tape on the edge of the test piece when performing air-coupled ultrasonic C-scan test on the test piece.
[0083] Optionally, the air-coupled ultrasonic detection device may further include: a tape specification selection unit.
[0084] The tape specification selection unit is used to stick a tape of a first tape specification on a partial area of the upper surface of the inspected object before the tape sticking unit 10 sticks a tape of preset size parameters on the edge of the inspected object.
[0085] Compare the A-scan waveform results of some areas of the upper surface before and after sticking the tape of the first tape specification. If the change in the transmission wave peak value in the A-scan waveform result is less than the preset peak threshold, the first tape specification is confirmed as the preset tape specification. If the change in the transmission wave peak value in the A-scan waveform result is greater than or equal to the preset peak threshold, the second tape specification is used as the first tape specification, and the change in the transmission wave peak value is evaluated again.
[0086] Optionally, the peak threshold is preset to 2 decibels.
[0087] Optionally, the tape sticking unit 10 may be specifically used to stick tapes of preset tape specifications on the upper edge and the lower edge of the object to be inspected.
[0088] Optionally, the air-coupled ultrasonic detection device may further include: a through-hole covering unit.
[0089] The through-hole covering unit is used to stick adhesive tape of preset adhesive tape specifications on the upper and lower sides of the through-hole before the air-coupled ultrasonic C-scan test is performed on the test piece, if the through-hole exists in the test piece, so that the adhesive tape covers the through-hole.
[0090] Optionally, the preset tape specifications include thickness, length, width, material, and adhesive properties of the tape.
[0091] Optionally, the thickness is below 0.2 mm.
[0092] Optional materials include paper, polymer transparent materials and opaque materials.
[0093] Optionally, the adhesive feature includes single-sided adhesive tape and double-sided adhesive tape.
[0094] The air-coupled ultrasonic detection device provided by the present invention is used for: pasting a tape of preset tape specifications on the edge of the test piece, so that the extension length of the tape beyond the edge of the test piece reaches a preset threshold value, wherein the preset tape specifications and the preset threshold value are related to the material properties of the test piece; removing bubbles at the place where the tape and the test piece are pasted, so that there is no air layer between the tape and the test piece; when performing air-coupled ultrasonic C-scan detection on the test piece, the side lobes of the probe are blocked by the tape pasted on the edge of the test piece, so as to obtain the air-coupled ultrasonic detection result of the test piece. The present invention utilizes the characteristic that air-coupled ultrasonic waves are insensitive to firmly pasted tapes, and by firmly pasting tapes on the edge of the test piece, the side lobes of the probe are successfully blocked, thereby effectively reducing the edge blind area in air-coupled ultrasonic detection, thereby improving the reliability and accuracy of air-coupled ultrasonic detection.
[0095] Regarding the device in the above embodiment, the specific manner in which each unit performs the operation has been described in detail in the embodiment of the method, and will not be elaborated here.
[0096] The air-coupled ultrasonic detection device includes a processor and a memory. The tape sticking unit 10, the bubble removal unit 20 and the detection result obtaining unit 30 are all stored in the memory as program units, and the processor executes the program units stored in the memory to realize corresponding functions.
[0097] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the characteristic that air-coupled ultrasonic waves are insensitive to firmly attached tapes is utilized by adjusting kernel parameters. By firmly attaching tapes to the edges of the test pieces, the side lobes of the probe are successfully blocked, thereby effectively reducing the edge blind area in air-coupled ultrasonic testing and improving the reliability and accuracy of air-coupled ultrasonic testing.
[0098] An embodiment of the present invention provides a computer-readable storage medium on which a program is stored. When the program is executed by a processor, the air-coupled ultrasonic detection method is implemented.
[0099] An embodiment of the present invention provides a processor, which is used to run a program, wherein the air-coupled ultrasonic detection method is executed when the program is run.
[0100] like Figure 6 As shown, an embodiment of the present invention provides an electronic device 1000, which includes at least one processor 1001, at least one memory 1002 and a bus 1003 connected to the processor 1001; wherein the processor 1001 and the memory 1002 communicate with each other through the bus 1003; the processor 1001 is used to call the program instructions in the memory 1002 to execute the above-mentioned air-coupled ultrasonic detection method. The electronic device in this article can be a server, a PC, a PAD, a mobile phone, etc.
[0101] The present invention also provides a computer program product, which, when executed on an electronic device, is suitable for executing a program that initializes the steps of the air-coupled ultrasonic detection method.
[0102] The present invention is described with reference to flowcharts and / or block diagrams of methods, apparatuses, electronic devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable device to generate a machine, so that the instructions executed by the processor of the computer or other programmable device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.
[0103] In a typical configuration, an electronic device includes one or more processors (CPU), a memory, and a bus. The electronic device may also include an input / output interface, a network interface, and the like.
[0104] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip. The memory is an example of a computer-readable medium.
[0105] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.
[0106] In the description of the present invention, it should be understood that the terms "up", "down", "front", "back", "left" and "right" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the positions or elements referred to must have specific directions, be constructed and operate in specific directions. Therefore, they should not be understood as limitations of the present invention.
[0107] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. It should also be noted that the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.
[0108] It should be understood by those skilled in the art that the embodiments of the present invention may be provided as methods, systems or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment or an embodiment combining software and hardware aspects. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.
[0109] The above are only embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims
1. An air-coupled ultrasonic detection method, characterized in that: include: Pasting a tape of preset tape specifications on the edge of the object to be inspected, so that the extension length of the tape beyond the edge of the object to be inspected reaches a preset threshold, wherein the preset tape specifications and the preset threshold are related to the material properties of the object to be inspected; Remove air bubbles from the adhesive tape and the inspected object so that there is no air layer between the adhesive tape and the inspected object; When performing air-coupled ultrasonic C-scan detection on the object to be detected, the side lobes of the probe are shielded by adhesive tape attached to the edge of the object to be detected, so as to obtain the air-coupled ultrasonic detection result of the object to be detected.
2. The method according to claim 1, characterized in that Before sticking the tape with preset size parameters on the edge of the inspected object, the method further includes: Pasting a tape of a first tape specification on a partial area of the upper surface of the object to be inspected; Compare the A-scan waveform results of the partial area of the upper surface before and after pasting the tape of the first tape specification; if the change in the peak value of the transmission wave in the A-scan waveform result is less than a preset peak threshold, confirm the first tape specification as the preset tape specification; if the change in the peak value of the transmission wave in the A-scan waveform result is greater than or equal to the preset peak threshold, use the second tape specification as the first tape specification, and return to execute the step of pasting the tape of the first tape specification on the partial area of the upper surface of the inspected object.
3. The method according to claim 2, characterized in that The preset peak threshold is 2 decibels.
4. The method according to claim 1, characterized in that: The step of sticking a tape of preset tape specifications on the edge of the object to be inspected includes: Adhesive tapes of preset tape specifications are respectively pasted on the upper and lower edges of the object to be inspected.
5. The method according to claim 1, characterized in that: Before performing air-coupled ultrasonic C-scan testing on the object to be tested, the method further includes: In the case where the inspected piece has a through hole, the tape of the preset tape specification is pasted on the upper and lower sides of the through hole so that the tape covers the through hole.
6. The method according to any one of claims 1 to 5, characterized in that The preset tape specifications include the thickness, length, width, material and adhesive properties of the tape.
7. The method according to claim 6, characterized in that The thickness is less than 0.2 mm, the material includes paper, polymer transparent material and opaque material, and the adhesive features include single-sided adhesive tape and double-sided adhesive tape.
8. An air-coupled ultrasonic detection device, characterized in that: include: Tape sticking unit, bubble removal unit and test result acquisition unit, The tape sticking unit is used to stick a tape of preset tape specifications on the edge of the inspected object so that the extension length of the tape beyond the edge of the inspected object reaches a preset threshold, wherein the preset tape specifications and the preset threshold are related to the material characteristics of the inspected object; The bubble removal unit is used to remove bubbles at the adhesion between the tape and the object to be inspected, so that there is no air layer between the tape and the object to be inspected; The detection result obtaining unit is used to obtain the air-coupled ultrasonic detection result of the test piece by blocking the side lobe of the probe by sticking tape on the edge of the test piece when performing air-coupled ultrasonic C-scan detection on the test piece.
9. A computer-readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, the air-coupled ultrasonic detection method according to any one of claims 1 to 7 is implemented.
10. An electronic device, characterized in that: The electronic device includes at least one processor, and at least one memory and a bus connected to the processor; wherein the processor and the memory communicate with each other through the bus; the processor is used to call program instructions in the memory to execute the air-coupled ultrasonic detection method as described in any one of claims 1 to 7.