CN114660172A - Transmission type ultrasonic imaging method for defects of complex curved surface workpiece - Google Patents
Transmission type ultrasonic imaging method for defects of complex curved surface workpiece Download PDFInfo
- Publication number
- CN114660172A CN114660172A CN202111355029.8A CN202111355029A CN114660172A CN 114660172 A CN114660172 A CN 114660172A CN 202111355029 A CN202111355029 A CN 202111355029A CN 114660172 A CN114660172 A CN 114660172A
- Authority
- CN
- China
- Prior art keywords
- ultrasonic
- curved surface
- scanning
- workpiece
- probe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/041—Analysing solids on the surface of the material, e.g. using Lamb, Rayleigh or shear waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0654—Imaging
- G01N29/069—Defect imaging, localisation and sizing using, e.g. time of flight diffraction [TOFD], synthetic aperture focusing technique [SAFT], Amplituden-Laufzeit-Ortskurven [ALOK] technique
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/0289—Internal structure, e.g. defects, grain size, texture
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/102—Number of transducers one emitter, one receiver
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses a transmission type ultrasonic imaging method for defects of a complex curved surface workpiece, and belongs to the field of nondestructive testing. Firstly, acquiring the overall dimension of a complex curved surface workpiece, and planning a detection path of the complex curved surface workpiece to ensure that a probe is vertical to the workpiece in the scanning process; then, carrying out ultrasonic detection on the workpiece, receiving an ultrasonic pulse transmission echo signal, and storing coordinate information of a workpiece scanning point position during ultrasonic excitation; and performing surface fitting on the plurality of scanning points to construct an imaging curved surface, and correspondingly imaging the transmission wave signals containing the ultrasonic data and the curved surface to obtain a three-dimensional C-scanning image. The method optimizes the imaging effect of the defects of the complex curved surface, avoids the distortion and dislocation of the shapes of the defects, and establishes a mapping relation between the coordinate information of the defects and the ultrasonic scanning data for imaging.
Description
Technical Field
The invention relates to an imaging method of a defect of a complex curved surface workpiece, in particular to a transmission type ultrasonic imaging method aiming at the defect of the complex curved surface workpiece, and belongs to the field of nondestructive testing.
Background
With the continuous progress of science and technology, various industries have also been developed greatly, especially in the field of manufacturing industry. Under the continuous application background of new processes such as Additive Manufacturing (AM), superplastic forming/diffusion bonding (SPF-DB) and the like, the quality control of new process products provides new challenges for nondestructive testing, and is mainly reflected in the acoustic characterization of conventional metal materials, composite materials and other novel materials on the surface and the inside. Various workpieces such as workpieces with simple shapes (such as flat plates and tubular workpieces), workpieces with complex shapes (such as free-form surfaces) and the like can have standard exceeding defects, and potential accident risks are caused to related fields due to the defects. Therefore, these workpiece materials require strict safety precautions to be properly used. The ultrasonic imaging detection technology is a detection means for judging the structure, property and state of an object to be detected by using the change of response to ultrasonic waves caused by defects or material structure abnormality without damaging the object to be detected. However, with the continuous development of manufacturing technology, the traditional ultrasonic imaging detection technology is limited to workpieces with conventional shapes, the detection efficiency is low, and the nondestructive detection requirement of workpieces with complex curved surface configurations cannot be met. Current ultrasound imaging detection techniques also appear increasingly limited.
The skin of the space shuttle belongs to a complex curved surface workpiece, and the state of the skin directly influences the performance and the service life of the whole shuttle. For the detection of the skin of the space shuttle, the skin is a complex curved surface, so that the ultrasonic scanning is difficult and the imaging representation form is limited. The company Panametrics in the united states developed a large curved surface ultrasonic automatic scanning system with an ARGUS robot arm double-beam structure. An Ultrasonic automatic detection System (Multi Aix Ultrasonic System) developed by Nukem Nutronik, Germany can realize the contour tracing of a curved surface, but needs to be completed by programming control of a detector. The U.S. MATEC company develops an ultrasonic automatic detection system for workpieces with complex curved surface shapes, can generate a scanning path track of an ultrasonic probe through a CAD (computer-aided design) model or a teaching method of the workpieces to be detected, and runs a track program to finish the ultrasonic detection of the workpieces. The laser ultrasonic imaging detection is carried out on the composite material laminated plate by utilizing the laser ultrasonic technology such as Zhongzheng, and the like, the experimental detection research is carried out by adopting two methods of a pulse echo type and a pulse transmission type, the propagation path rule of the laser ultrasonic at the edge layering part of the composite material laminated plate is analyzed, the laser ultrasonic characterization method of the layering defect is summarized, and the shape and the space position of the defect can be accurately distinguished. But the quality evaluation of the ultrasonic C scanning technology at the present stage mainly focuses on the drawing and the enhancement of a two-dimensional color map.
Aiming at the current technical situation, a characterization method of the defects of the complex curved surface workpiece needs to be further developed, and the defects of the complex curved surface workpiece are imaged by fully utilizing an ultrasonic probe and a mechanical scanning device.
Disclosure of Invention
The invention provides an imaging method for matching ultrasonic echo information of a curved surface workpiece defect with coordinate data thereof in an innovative manner aiming at the characterization problem of skin defects of a space shuttle.
The invention provides a method for imaging in ultrasonic scanning of defects of a complex curved surface workpiece. A six-degree-of-freedom mechanical arm is used for clamping a double probe to perform transmission type ultrasonic scanning on a curved surface workpiece, an excitation probe is placed at one end of the six-degree-of-freedom mechanical arm, and a receiving probe is placed at the other end of the six-degree-of-freedom mechanical arm. In the process of scanning the complex curved surface by using the ultrasonic flaw detection technology, the excitation probe transmits excitation sound waves, the receiving probe receives transmission ultrasonic A scanning signals, the form information of the defects of the workpiece can be obtained, the coordinate information of the probe at the moment is obtained, the position information of the defects on the workpiece can be determined, and finally the form and position representation of the defects of the complex curved surface workpiece is realized. The method can solve the problem of defect dislocation during defect imaging of the complex curved surface workpiece, and can achieve the purpose of accurately measuring the shape and position of the defect.
In order to achieve the purpose, the technical scheme adopted by the invention is that transmitted wave data and scanning point location information of an ultrasonic probe in a scanning process are utilized to be calculated and processed, a mapping relation is established between the transmitted wave data information of the probe and the scanning point location information, and finally the shape and the position of a complex curved surface defect are obtained after C scanning imaging. The ultrasonic water immersion type ultrasonic water immersion testing device comprises a mechanical arm, a probe clamp, a signal excitation/receiving source, an oscilloscope and an upper computer, wherein the mechanical arm is connected with the probe clamp, the probe clamp clamps 2 ultrasonic water immersion probes, the ultrasonic water immersion excitation probes are connected with the signal excitation/receiving source, the ultrasonic water immersion receiving probes are connected with the oscilloscope, and the oscilloscope is connected with the upper computer and transmits acquired signals to the upper computer.
A transmission type ultrasonic imaging method for defects of a complex curved surface workpiece is characterized in that an ultrasonic probe is clamped by a mechanical arm to carry out ultrasonic detection on the complex curved surface workpiece, and the method comprises the following specific implementation steps:
s1, acquiring the overall dimension of the complex curved surface workpiece, planning a detection path of the complex curved surface workpiece, and ensuring that the probe is vertical to the workpiece (namely, the probe is consistent with the normal vector direction of the surface of the workpiece) in the scanning process;
s2, carrying out ultrasonic detection on the workpiece, receiving an ultrasonic pulse transmission echo signal, and storing coordinate information of a workpiece scanning point position during ultrasonic excitation;
and S3, performing surface fitting on the scanning points to construct an imaging surface, and correspondingly imaging the transmission wave signals containing the ultrasonic data and the surface to obtain a final three-dimensional C-scanning image.
In step S1, the complex curved surface is also called a hyperboloid, that is, curvature changes exist in both x and y directions, and when a scanning path is planned, to ensure that the orientation of the probe is consistent with the normal vector of the workpiece surface, a probe scanning path program is written in the mechanical arm simulation software. According to the overall dimension of a complex curved surface workpiece, a probe detection path is arranged in a mechanical arm: firstly, a complex curved surface model is led into simulation software, position parameters of the complex curved surface model are set to be consistent with the position of an actual workpiece, then a track planning program is compiled and set, the track planning program comprises scanning speed, scanning direction, stepping distance and the like, and finally the scanning underwater acoustic distance is set to ensure that an ultrasonic transmission signal can be received.
The ultrasonic detection path is composed of a plurality of discrete scanning points, a set path program is led into the mechanical arm demonstrator, and the mechanical arm is controlled to carry out ultrasonic scanning.
In step S2, when performing ultrasonic detection, the output interface of the ultrasonic signal excitation/reception source (ultrasonic pulse transmitter/receiver) is connected to the input interface of the oscilloscope through the coaxial cable; the ultrasonic probe is connected with an excitation (transmitting) interface of an ultrasonic signal excitation/receiving source (ultrasonic pulse transmitting/receiving instrument) through a coaxial cable, the ultrasonic receiving probe is connected with a receiving interface of the ultrasonic signal excitation/receiving source (ultrasonic pulse transmitting/receiving instrument), the ultrasonic excitation probe and the ultrasonic receiving probe are respectively clamped on a probe clamp, the two ultrasonic probes are always kept on two sides of a complex curved surface workpiece in the scanning process, the probe clamp is connected with a mechanical arm, and a coupling agent is arranged between the two ultrasonic probes and the complex curved surface workpiece. Preferably, the coupling agent is deionized water.
In step S2, the ultrasonic signal excitation/reception source is used to excite the ultrasonic water immersion excitation probe, scanning parameters are set, a one-excitation one-reception mode is adopted, energy is set to 12.5 micro-focus, repetition frequency is 100Hz, transmitted wave data of the reception probe is collected, and the three-dimensional data coordinates of the probe at this time are recorded.
In the scanning process, acquiring ultrasonic A scanning data during each excitation and recording the coordinate of the three-dimensional data at the moment; and acquiring the transmitted wave signals of the ultrasonic receiving probe by using an oscilloscope, scanning in a bow-shaped manner, and storing each line of data as a data file. And recording the three-dimensional data coordinates of the ultrasonic probe during acquisition by using an upper computer in a software programming mode.
In step S3, surface fitting is performed on the discrete points (of the three-dimensional data coordinates) by using a bi-harmonic spline interpolation method, so as to construct an imaging surface of the complex surface workpiece contour.
And processing ultrasonic scanning data stored in the oscilloscope, converting the data obtained by scanning the Chinese character bow into ultrasonic B-scan data stored in the same direction, establishing a two-dimensional matrix, and correspondingly imaging the ultrasonic data in the two-dimensional matrix and the imaging curved surface to obtain a final three-dimensional C-scan image.
The method is operated based on an MATLAB platform, firstly, a fitting curved surface is created by utilizing a griddata function through MATLAB software by adopting a bi-harmonic spline interpolation method, after an imaging curved surface is obtained, acquired ultrasonic data are converted into an acoustic wave characteristic value matrix, and meanwhile, the imaging curved surface is matched with the acoustic wave characteristic value matrix by utilizing a surf function, so that three-dimensional imaging is completed.
Compared with the prior art, the invention has the following gain effect.
1. The invention obtains the coordinate information of the scanning points by utilizing the information of the complex curved surface workpiece model, fits a plurality of scanning points into a new imaging curved surface, and carries out defect imaging on the new curved surface. In the prior art, only imaging of defects of a plane workpiece or a single-curved workpiece is considered, and the research value of imaging of defects of complex workpieces is ignored. The invention fully utilizes the information of the complex curved surface model to calculate the coordinates of the scanning points, and after the coordinates are subjected to surface fitting, the defect imaging is carried out on the fitted curved surface.
2. The method optimizes the imaging effect of the defects of the complex curved surface, avoids the distortion and dislocation of the shapes of the defects, and establishes a mapping relation between the coordinate information of the defects and the ultrasonic scanning data for imaging.
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Drawings
FIG. 1 is a diagram of a complex surface model scanned according to an embodiment of the present invention;
FIG. 2 is a schematic view of the ultrasonic testing principle of the present invention;
FIG. 3 is a time domain waveform collected by a water immersion probe in an embodiment of the present invention;
FIG. 4 is an image of a complex curved workpiece according to the present invention.
Detailed Description
The invention is described in detail below with reference to the drawings and the detailed description.
At the present stage, more and more workpieces with complex curved surfaces exist, various standard-exceeding defects may exist in the workpieces, the defects directly affect the use of the workpieces, and whether the quality of the workpieces can continuously meet the use requirements needs to be checked by means of nondestructive testing.
The embodiment of the invention provides an imaging method for complex curved surface defects. Firstly, acquiring the overall dimension of a complex curved surface workpiece, and planning a detection path of the complex curved surface workpiece to ensure that the normal vector directions of an excitation probe, a receiving probe and a scanning point are consistent in the scanning process; secondly, carrying out ultrasonic detection on the surface of the workpiece, receiving ultrasonic pulse transmitted wave signals, and storing coordinate information of scanning point positions on the surface of the workpiece during ultrasonic excitation; and finally, performing surface fitting on the scanning points of the probe to construct an imaging surface, and correspondingly imaging the pulse transmission wave signals containing the ultrasonic data and the surface to obtain a final C-scanning image.
The equipment adopted in the embodiment comprises 1 ultrasonic signal exciter/receiver-ultrasonic pulse emitter/receiver, 2 5MHz ultrasonic sensors-exciter probe and receiver probe, a transmission type probe clamp, 1 mechanical arm, 1 signal acquisition device, 1 digital oscilloscope and an upper computer. The specific implementation steps are as follows:
s1, acquiring the outline dimension of the complex curved surface workpiece, as shown in figure 1; planning a detection path of the scanning point, and offsetting according to the normal vector direction of the scanning point to obtain an imaging curved surface;
the complex curved surface is called as a hyperboloid, namely, curvature changes exist in the x direction and the y direction, and when a scanning path is planned, as shown in fig. 2, in order to ensure that the orientation of the probe is consistent with the normal vector of the surface of a workpiece, a probe scanning path program is written in mechanical arm simulation software SimPro. The complex surface model is firstly imported into simulation software SimPro software, and the position parameters of the complex surface model are set to be consistent with the actual workpiece position. And then writing a track planning program comprising scanning speed, scanning direction, stepping distance and the like, and finally setting scanning underwater acoustic distance to ensure that the ultrasonic transmission signals can be received.
Drawing a scanning path, taking a curved surface workpiece with the length of 200mm and the width of 150mm as an example, wherein the x direction is the length direction, the y direction is the width direction, the scanning range in the x direction is set to be 220mm, and the stepping distance is 0.2 mm; the y-direction scanning range was set to 170mm, and the step distance was 0.2 mm. A5 MHz ultrasonic focusing probe is selected, the diameter is 10mm, and the underwater acoustic distance is 50 mm.
The path is composed of a plurality of discrete scanning points, the path program is led into the mechanical arm demonstrator, and the mechanical arm is controlled to carry out ultrasonic scanning.
S2, carrying out ultrasonic detection on the workpiece and receiving an ultrasonic pulse echo signal;
before detection, the detection equipment is installed, a transmitting (exciting) interface of an ultrasonic pulse transmitting/receiving instrument is connected with an exciting probe through a coaxial cable, a receiving interface of the ultrasonic pulse transmitting/receiving instrument is connected with a receiving probe through a coaxial cable, an access interface of a digital oscilloscope is connected with an output interface of the ultrasonic pulse transmitting/receiving instrument, the model of the ultrasonic pulse transmitting/receiving instrument can be 5800PR, the ultrasonic exciting probe and the ultrasonic receiving probe are respectively clamped at two ends of a transmission-type probe clamp and are respectively positioned at two sides of a complex curved surface workpiece in a scanning process, the probes are kept at two sides of the workpiece, one signal is generated and the other signal is received, the transmission-type probe clamp is connected with a mechanical arm, the complex curved surface workpiece is flatly placed in a detection water tank, and deionized water is used as a coupling agent.
The ultrasonic signal excitation source is used for exciting the water immersion ultrasonic probe, scanning parameters are set, a one-excitation one-collection mode is adopted, the energy is set to be 12.5 micro-focus, and the repetition frequency is 100 Hz.
In the scanning process of the ultrasonic probe, acquiring ultrasonic A scanning data during each excitation and recording the coordinate of the three-dimensional data at the moment; and acquiring transmitted wave signals of the ultrasonic probe by using an oscilloscope, scanning in a bow-shaped manner, and storing each line of data as a data file. And recording the three-dimensional data coordinates of the ultrasonic probe during acquisition by using an upper computer in a software programming mode.
During detection, a probe is fixed on a tail end clamp of a mechanical arm, a scanning program of the mechanical arm is started, the probe traverses each detection point, a pulse emitter generates a longitudinal wave pulse signal in the detection process, so that the probe vibrates and generates ultrasonic waves to be emitted into a complex curved surface workpiece, as shown in fig. 2, the amplitude of a transmitted wave of the longitudinal wave is obviously attenuated after the longitudinal wave meets a defect in the complex curved surface workpiece, the attenuated transmitted wave signal is received by a receiving sensor, the transmitted wave signal is converted into an electric signal to be received by a pulse receiver and recorded on a digital oscilloscope as a time domain signal, wherein the digital oscilloscope is of a Tektronix DPO 3012 type, and the waveform is shown in fig. 3.
And S3, performing surface fitting on the plurality of scanning points to construct an imaging surface, and correspondingly imaging the transmission wave signals containing the ultrasonic data and the surface to obtain a final C-scanning image.
In step S3, to facilitate coordinate transformation, a spatial rectangular coordinate system is established based on the mechanical arm base coordinate system, coordinates of data acquisition points are extracted and fitted to an imaging curved surface, and the newly obtained curved surface is consistent with the contour of the curved surface workpiece. And performing surface fitting on the scanned discrete points by using a bi-harmonic spline interpolation method to obtain a new fitted surface, wherein the newly obtained surface is consistent with the surface profile of the curved surface workpiece.
And processing the ultrasonic scanning data stored in the oscilloscope, establishing an imaging matrix, and correspondingly imaging the ultrasonic data in the imaging matrix and the three-dimensional curved surface to obtain a final three-dimensional C-scanning image.
The method is operated based on an MATLAB platform, firstly, a fitted surface is created by utilizing a griddata function through MATLAB software by adopting a bi-harmonic spline interpolation method, after an imaging surface is obtained, acquired ultrasonic data are converted into an acoustic wave characteristic value matrix, and meanwhile, the imaging surface is matched with the acoustic wave characteristic value matrix by utilizing a surf function to complete three-dimensional imaging, as shown in figure 4.
According to the ultrasonic imaging principle, the ultrasonic probe is used for transmitting ultrasonic waves to the workpiece, the amplitude of transmitted waves is obviously reduced when the ultrasonic waves encounter workpiece defects in the transmission process, and the acoustic energy at the moment is analyzed, so that the acoustic characteristic information of the workpiece can be reflected. When the complex curved surface workpiece is scanned, the scanning path of the ultrasonic probe is fitted into a curved surface, a mapping relation is established between the scanned curved surface and a transmission signal received by the receiving probe, the amplitude change of the head wave of the A scanning waveform is analyzed, and finally the shape and the position of the complex curved surface defect are obtained after C scanning imaging is carried out, so that the imaging of the complex curved surface workpiece defect is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and the inventive concept within the technical scope of the present invention.
Claims (9)
1. A transmission type ultrasonic imaging method for defects of a complex curved surface workpiece utilizes a mechanical arm to clamp an ultrasonic probe to carry out ultrasonic detection on the complex curved surface workpiece, and comprises the following steps:
s1, acquiring the overall dimension of the complex curved surface workpiece, and planning a detection path of the complex curved surface workpiece to ensure that the probe is vertical to the workpiece in the scanning process;
s2, carrying out ultrasonic detection on the workpiece, receiving an ultrasonic pulse transmission echo signal, and storing coordinate information of a workpiece scanning point position during ultrasonic excitation;
and S3, performing surface fitting on the scanning points to construct an imaging curved surface, and correspondingly imaging the transmission wave signals containing the ultrasonic data and the curved surface to obtain a three-dimensional C-scanning image.
2. The method of claim 1, wherein the method comprises: according to the overall dimension of a complex curved surface workpiece, a probe detection path is arranged in a mechanical arm: firstly, a complex curved surface model is led into simulation software, position parameters of the complex curved surface model are set to be consistent with the actual workpiece position, then a track planning program is compiled and set, the track planning program comprises scanning speed, scanning direction and stepping distance, and finally the underwater acoustic distance is set to ensure that ultrasonic transmission signals can be received.
3. The method of claim 2, wherein the method comprises: the ultrasonic detection path is composed of a plurality of discrete scanning points, a set path program is led into the mechanical arm demonstrator, and the mechanical arm is controlled to carry out ultrasonic scanning.
4. The method of claim 1, wherein the method comprises: when ultrasonic detection is carried out, an output interface of an ultrasonic signal excitation/receiving source is connected with an input interface of an oscilloscope through a coaxial cable; the ultrasonic excitation probe is connected with an excitation interface of an ultrasonic signal excitation/receiving source through a coaxial cable, the ultrasonic receiving probe is connected with a receiving interface of the ultrasonic signal excitation/receiving source, the ultrasonic excitation probe and the ultrasonic receiving probe are respectively clamped on a probe clamp, the two ultrasonic probes are kept on two sides of a complex curved surface workpiece in the scanning process, the probe clamp is connected with a mechanical arm, and a coupling agent is arranged between the two ultrasonic probes and the complex curved surface workpiece.
5. The method of claim 4, wherein the method comprises: the ultrasonic water immersion excitation probe is excited by an ultrasonic signal excitation/receiving source, scanning parameters are set, transmission wave data of the receiving probe are collected in a one-excitation one-receiving mode, and the three-dimensional data coordinate of the probe at the moment is recorded.
6. The method of claim 5, wherein: in the scanning process, acquiring ultrasonic A scanning data during each excitation and recording the coordinate of the three-dimensional data at the moment; acquiring transmission wave signals of an ultrasonic receiving probe by using an oscilloscope, scanning in a bow-shaped manner, and storing each line of data as a data file; and recording the three-dimensional data coordinates of the ultrasonic probe during acquisition by using an upper computer.
7. The method of claim 6, wherein: and performing surface fitting on discrete points of the three-dimensional data coordinates by using a bi-harmonic spline interpolation method to construct an imaging surface of the complex surface workpiece outline.
8. The method of claim 7, wherein: and processing ultrasonic scanning data stored in the oscilloscope, converting the data obtained by scanning the Chinese character bow into ultrasonic B-scan data stored in the same direction, establishing a two-dimensional matrix, and correspondingly imaging the ultrasonic data in the two-dimensional matrix and the imaging curved surface to obtain a final three-dimensional C-scan image.
9. The method of claim 8, wherein: the method comprises the steps of operating on the basis of an MATLAB platform, firstly creating a fitting curved surface by utilizing a griddata function through an MATLAB software by adopting a bi-harmonic spline interpolation method, converting acquired ultrasonic data into an acoustic wave characteristic value matrix after obtaining an imaging curved surface, and matching the imaging curved surface with the acoustic wave characteristic value matrix by utilizing a surf function to complete three-dimensional imaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355029.8A CN114660172A (en) | 2021-11-16 | 2021-11-16 | Transmission type ultrasonic imaging method for defects of complex curved surface workpiece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355029.8A CN114660172A (en) | 2021-11-16 | 2021-11-16 | Transmission type ultrasonic imaging method for defects of complex curved surface workpiece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114660172A true CN114660172A (en) | 2022-06-24 |
Family
ID=82026145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111355029.8A Pending CN114660172A (en) | 2021-11-16 | 2021-11-16 | Transmission type ultrasonic imaging method for defects of complex curved surface workpiece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114660172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115469015A (en) * | 2022-10-31 | 2022-12-13 | 泉州装备制造研究所 | Curved surface component ultrasonic self-adaptive detection method |
-
2021
- 2021-11-16 CN CN202111355029.8A patent/CN114660172A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115469015A (en) * | 2022-10-31 | 2022-12-13 | 泉州装备制造研究所 | Curved surface component ultrasonic self-adaptive detection method |
| CN115469015B (en) * | 2022-10-31 | 2023-01-31 | 泉州装备制造研究所 | Curved surface component ultrasonic self-adaptive detection method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114295728B (en) | Ultrasonic three-dimensional tomography method for internal defects of complex curved surface workpiece | |
| CN108169331B (en) | Sheet grid wing structure welding seam phased array ultrasonic detection device and detection method | |
| EP1709418B1 (en) | Method and apparatus for examining the interior material of an object, such as a pipeline or a human body from a surface of the object using ultrasound | |
| CN106770664B (en) | A method of edge defect detection is improved based on total focus imaging algorithm | |
| CN113888471B (en) | High-efficiency high-resolution defect nondestructive testing method based on convolutional neural network | |
| CN101852774B (en) | Flaw detection system and flaw detection method | |
| CN105699492B (en) | A kind of ultrasonic imaging method for weld seam detection | |
| CN104990982B (en) | Honeycomb sandwich structure ultrasonic imaging detection method based on automatic scanning | |
| CN107102065A (en) | The ultrasonic wave detecting system of one kind of multiple coupled modes | |
| CN104865316B (en) | A kind of unilateral air coupling ultrasonic scanned imagery device | |
| JP4634336B2 (en) | Ultrasonic flaw detection method and ultrasonic flaw detection apparatus | |
| CN107576729B (en) | Ultrasonic phased array-based weld defect detection and rapid extraction system and method | |
| CN105319272B (en) | A kind of immersed ultrasonic test method based on angular domain signal reconstruction | |
| CN105954359B (en) | Complicated shape inside parts defect distribution formula ultrasonic no damage detection device and method | |
| CN110196231A (en) | A kind of laser-ultrasound off-line detection device and method increasing material product | |
| CN104977356A (en) | Composite material foam structure ultrasonic detection method based on reflection theory | |
| CN105467011A (en) | Method for precisely positioning defect location during ultrasonic C scanning detection | |
| CN114660172A (en) | Transmission type ultrasonic imaging method for defects of complex curved surface workpiece | |
| JP2019506597A (en) | Apparatus and method for inspecting and measuring welding defects on a cylindrical wall | |
| CN114062497A (en) | Ultrasonic three-dimensional imaging method for surface defects of complex curved surface workpiece | |
| CN113256566A (en) | Pipeline weld defect identification method | |
| CN115856087A (en) | Full-focusing imaging method based on longitudinal wave transmitting-receiving ultrasonic phased array probe | |
| CN111665296A (en) | Method and device for measuring three-dimensional radiation sound field of ultrasonic transducer based on EMAT | |
| CN114942270A (en) | Portable ultrasonic phased array detection imaging system | |
| JP5235028B2 (en) | Ultrasonic flaw detection method and ultrasonic flaw detection apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |