CN110849976A - Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device - Google Patents
Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device Download PDFInfo
- Publication number
- CN110849976A CN110849976A CN201911191148.7A CN201911191148A CN110849976A CN 110849976 A CN110849976 A CN 110849976A CN 201911191148 A CN201911191148 A CN 201911191148A CN 110849976 A CN110849976 A CN 110849976A
- Authority
- CN
- China
- Prior art keywords
- guided wave
- ultrasonic guided
- frequency
- detection
- pipeline
- 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
- G01N29/06—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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
-
- 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
-
- 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
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/262—Arrangements for orientation or scanning by relative movement of the head and the sensor by electronic orientation or focusing, e.g. with phased arrays
-
- 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
- G01N2291/26—Scanned objects
- G01N2291/262—Linear objects
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)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
The invention discloses an ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device, and belongs to the technical field of nondestructive detection. Calculating the frequency dispersion characteristic of the SH0 modal ultrasonic guided wave according to the geometric dimension and the material mechanics parameters of the pipeline; on the basis, a pipeline area which possibly has defects is quickly scanned by adopting low-frequency ultrasonic guided waves, and the defects are roughly positioned; carrying out high-frequency fine detailed inspection on a refined grid in a region near the low-frequency ultrasonic guided wave rapid scanning image defect; and fusing low-frequency quick scanning and high-frequency fine detailed information to generate an ultrasonic guided wave multi-resolution focusing image. The invention solves the contradiction between the ultrasonic guided wave detection resolution and the detection efficiency, and lays a foundation for the high-efficiency ultrasonic guided wave focusing imaging detection of the pipeline.
Description
Technical Field
The invention relates to an ultrasonic guided wave pipeline detection method and device, in particular to an ultrasonic guided wave pipeline detection method and device capable of realizing multi-resolution focused imaging, and belongs to the technical field of nondestructive testing.
Background
The pipeline is an important mode for oil and gas resource transportation, and serious economic loss and casualties are caused by damage and leakage of the pipeline, so that the pipeline must be regularly detected so as to find potential hidden dangers in time. The ultrasonic guided wave detection is an important method for pipeline detection, has the characteristics of long detection distance, high efficiency, good adaptability and the like, and is widely applied to the field of pipeline detection in recent years. At present, the ultrasonic guided wave detection is developed from simple echo detection to imaging detection, so that the detection sensitivity is improved, and the visual display of the ultrasonic guided wave detection result is realized.
The typical ultrasonic guided wave imaging adopts a phased array focusing imaging technology, and the basic principle is that ultrasonic guided wave beams are focused at a specific position of a detected structure by controlling the delayed emission of signals of all channels of an ultrasonic guided wave transducer array, and the weight and the delay parameters of all the channels are adjusted on the basis, so that the movement of the ultrasonic guided wave focusing point can be realized, the purpose of ultrasonic guided wave scanning detection is achieved, and the scanning imaging result of the detected structure is obtained. The existing ultrasonic guided wave phased array focusing imaging technology adopts a global point-by-point scanning method in the scanning imaging process. When the ultrasonic guided wave is focused and detected, if the lower frequency is adopted, the detection range of the ultrasonic guided wave at the focusing position is larger, the larger moving distance of a focusing point can be adopted, but the detection resolution of the ultrasonic guided wave is lower, and the method is suitable for rough characterization of defects; if a higher frequency is adopted, the detection resolution of the ultrasonic guided wave is higher, but the detection range of the ultrasonic guided wave at the focusing position is smaller, and a smaller moving distance of a focusing point is required to be adopted, so that the method is suitable for quantitative characterization of defects. When the global point-by-point scanning method is adopted to realize the ultrasonic guided wave focusing imaging, the contradiction between the ultrasonic guided wave detection resolution and the moving distance of a focusing point, namely the contradiction between the ultrasonic guided wave detection resolution and the detection efficiency, is difficult to overcome.
Disclosure of Invention
In view of the above, an object of the present invention is to provide an ultrasonic guided wave pipeline inspection method and apparatus capable of implementing multi-resolution focused imaging, so as to solve the above-mentioned defects in the prior art, and coordinate the contradiction between the ultrasonic guided wave inspection resolution and the inspection efficiency.
The invention is realized by the following technical scheme:
the ultrasonic guided wave pipeline detection method capable of realizing multi-resolution focused imaging comprises the following steps:
(1) calculating the frequency dispersion characteristic of ultrasonic guided wave adopted by pipeline detection
According to the geometric dimensions such as the inner diameter and the outer diameter of the pipeline, the Young modulus, the Poisson ratio and other material mechanical parameters, the frequency dispersion characteristic of the SH0 modal ultrasonic guided wave is solved through a commercial ultrasonic guided wave frequency dispersion characteristic calculation program.
(2) Determining detection area of ultrasonic guided wave focusing imaging
And (4) according to the working condition of the pipeline, the detector pre-judges the pipeline region possibly having defects and determines the detection region of the ultrasonic guided wave focusing imaging.
(3) Low-frequency ultrasonic guided wave rapid scanning detection area
And when the low-frequency rapid scanning is carried out, the matrix switch is configured into a low-frequency rapid scanning mode, and meanwhile, the pipeline detection area is divided into grids according to scanning offset and the time delay of each channel of the transducer array corresponding to the grids is calculated. The sinusoidal pulse signal with time delay is loaded to the transducer array after power amplification to excite SH0 mode ultrasonic guided waves. After the ultrasonic guided wave is subjected to grid focusing detection, the detection device processes echoes sensed by the transducer array, and ultrasonic guided wave focusing detection signals of the grid can be obtained. And traversing all grids in the scanning area to obtain a low-frequency ultrasonic guided wave quick scanning image.
(4) Analyzing the quick scanning result of the low-frequency ultrasonic guided wave and determining the fine detailed scanning area of the high-frequency ultrasonic guided wave
And taking the maximum value drop-6 dB of the image signal as a threshold value, and searching the grids with the amplitude value larger than the threshold value to serve as a fine detail searching region of the high-frequency ultrasonic guided wave.
(5) High-frequency ultrasonic guided wave fine detail inspection of defect vicinity area
And when the high-frequency fine detailed investigation is carried out, the matrix switch is configured into a high-frequency fine detailed investigation mode, and meanwhile, the high-frequency ultrasonic guided wave fine detailed investigation region of the pipeline is divided into grids according to the detailed investigation offset and the time delay of each channel of the transducer array corresponding to the grids is calculated. The sinusoidal pulse signal with time delay is loaded to the transducer array after power amplification to excite SH0 mode ultrasonic guided waves. After the ultrasonic guided wave is subjected to grid focusing detection, the detection device processes echoes sensed by the transducer array, and ultrasonic guided wave focusing detection signals of the grid can be obtained. And traversing all grids in the high-frequency ultrasonic guided wave fine detailed investigation region to obtain a high-frequency ultrasonic guided wave fine detailed investigation image.
(6) Synthesizing an ultrasound guided wave multi-resolution focused image
And the computer superimposes the high-frequency ultrasonic guided wave fine detailed inspection image of the area near the defect to the grid area corresponding to the low-frequency ultrasonic guided wave scanning image to generate an ultrasonic guided wave multi-resolution focusing image.
Second, can realize supersound guided wave pipeline detection device of multiresolution focus formation of image
The ultrasonic guided wave energy conversion system comprises a computer software and hardware part, an ultrasonic guided wave excitation part, an ultrasonic guided wave receiving part and a configurable ultrasonic guided wave transducer array.
The computer software and hardware part realizes the functions of calculating the frequency dispersion characteristic of the ultrasonic guided wave, controlling the generation and the receiving of the ultrasonic guided wave signals of each channel, configuring the working mode of each channel of the ultrasonic guided wave transducer array, processing the ultrasonic guided wave multi-resolution focused image and the like.
The ultrasonic guided wave excitation part comprises a signal generation module and a power amplification module. The signal generating module generates a sine pulse signal under the control of a computer, and the sine pulse signal is amplified into a power signal which can be applied to the ultrasonic guided wave transducer through the power amplifying module.
The ultrasonic guided wave receiving part comprises a signal amplification module and a signal acquisition module. The signal amplification module conditions the weak signals received by the ultrasonic guided wave transducers of all channels into signals suitable for the signal acquisition module, and the signal acquisition module converts the analog signals conditioned by the signal amplification module into digital signals and transmits the digital signals to a computer.
The configurable ultrasonic guided wave transducer array comprises a matrix switch and an ultrasonic guided wave transducer array, and the ultrasonic guided wave transducer array can be configured into a low-frequency rapid scanning mode and a high-frequency fine detailed scanning mode by configuring the matrix switch through a computer.
The invention has the following main beneficial effects:
the method for roughly positioning the defects through global fast low-frequency scanning, performing high-frequency fine detailed scanning in the defect region, and combining the low-frequency fast scanning and the high-frequency fine detailed scanning information to generate the ultrasonic guided wave multi-resolution focused image solves the contradiction between the ultrasonic guided wave detection resolution and the detection efficiency, and lays a foundation for the high-efficiency ultrasonic guided wave focused imaging detection of the pipeline.
Drawings
FIG. 1 is a flow chart of the detection method of the present invention;
FIG. 2 is a schematic diagram of the low frequency ultrasonic guided wave fast scanning of the present invention;
FIG. 3 is a detailed view of the high frequency ultrasonic guided wave of the present invention;
FIG. 4 is a schematic diagram of the multi-resolution ultrasonic guided wave focusing imaging detection device of the present invention;
FIG. 5 is a schematic view of an ultrasonic guided-wave magnetostrictive transducer of the present invention;
FIG. 6 is a schematic view of an ultrasonic guided wave transducer of the present invention in an operational mode;
FIG. 7 is a low frequency ultrasonic guided wave fast scan image of the present invention;
figure 8 is an ultrasonic guided wave multi-resolution focused image of the present invention.
The specific implementation mode is as follows:
the invention is further illustrated by the following figures and examples.
As shown in fig. 1, the method for detecting an ultrasonic guided wave pipe capable of realizing multi-resolution focused imaging provided by the invention comprises the following steps:
(1) calculating the frequency dispersion characteristic of ultrasonic guided wave adopted by pipeline detection
According to the geometric dimensions such as the inner diameter and the outer diameter of the pipeline, the Young modulus, the Poisson ratio and other material mechanical parameters, the frequency dispersion characteristic of the SH0 modal ultrasonic guided wave is solved through a commercial ultrasonic guided wave frequency dispersion characteristic calculation program.
(2) Determining detection area of ultrasonic guided wave focusing imaging
And (4) according to the working condition of the pipeline, the detector pre-judges the pipeline region possibly having defects and determines the detection region of the ultrasonic guided wave focusing imaging. The detection area is actually the area where the detection personnel are concerned that needs to determine the health condition of the pipeline structure through detection.
(3) Low-frequency ultrasonic guided wave rapid scanning detection area
After the pipeline detection area is determined, the computer configures the matrix switch to a low-frequency rapid scanning mode, and simultaneously divides the pipeline detection area into grids according to scanning offset and calculates the time delay of each channel of the transducer array corresponding to the grids. In the low-frequency quick scanning process, the computer control signal generation module generates a sine pulse signal with time delay, and the sine pulse signal is loaded to the transducer array after power amplification to excite the SH0 modal ultrasonic guided wave. After the ultrasonic guided wave is subjected to grid focusing detection, an echo is induced by a transducer array, and digital signals of all channels formed after conditioning and sampling are subjected to computer delay processing, so that ultrasonic guided wave focusing detection signals of the grid can be obtained. And traversing all grids in the scanning area to obtain a low-frequency ultrasonic guided wave quick scanning image.
(4) Analyzing the quick scanning result of the low-frequency ultrasonic guided wave and determining the fine detailed scanning area of the high-frequency ultrasonic guided wave
The low-frequency ultrasonic guided wave fast scanning image is usually a sparse image, namely echo signals with larger energy are concentrated at the position of a grid containing defects. And taking the maximum value drop-6 dB of the image signal as a threshold value, and searching the grids with the amplitude value larger than the threshold value to serve as a fine detail searching region of the high-frequency ultrasonic guided wave.
(5) High-frequency ultrasonic guided wave fine detail inspection of defect vicinity area
After the fine detail investigation region of the high-frequency ultrasonic guided wave of the pipeline is determined, the computer configures the matrix switch to a high-frequency fine detail investigation mode, and simultaneously divides the fine detail investigation region of the high-frequency ultrasonic guided wave of the pipeline into grids according to the detail investigation offset and calculates the time delay of each channel of the transducer array corresponding to the grids. In the fine detailed inspection process of the high-frequency ultrasonic guided waves, the computer controls the signal generation module to generate a sine pulse signal with time delay, and the sine pulse signal is loaded to the transducer array after power amplification to excite the SH0 modal ultrasonic guided waves. After the ultrasonic guided wave is subjected to grid focusing detection, an echo is induced by a transducer array, and digital signals of all channels formed after conditioning and sampling are subjected to computer delay processing, so that ultrasonic guided wave focusing detection signals of the grid can be obtained. And traversing all grids in the high-frequency ultrasonic guided wave fine detailed investigation region to obtain a high-frequency ultrasonic guided wave fine detailed investigation image.
(6) Synthesizing an ultrasound guided wave multi-resolution focused image
And the computer superimposes the high-frequency ultrasonic guided wave fine detailed inspection image of the area near the defect to the grid area corresponding to the low-frequency ultrasonic guided wave scanning image to generate an ultrasonic guided wave multi-resolution focusing image.
As shown in the attached figure 2, the low-frequency ultrasonic guided wave rapid scanning mode provided by the invention utilizes the characteristic that the ultrasonic guided wave has a larger detection range at a focusing position when the frequency is lower, reduces the number of detection scanning grids, and improves the detection efficiency of the ultrasonic guided wave. When the low-frequency ultrasonic guided wave is scanned quickly, the computer configures the matrix switch to a low-frequency quick scanning mode, and divides a pipeline detection area into grids according to scanning offset. The scanning offset is determined according to the half wavelength of the adopted ultrasonic guided wave. The computer calculates the time delay of each channel according to the distance between the center of the grid and each channel of the transducer array uniformly distributed on the circumference of the pipeline, and each channel of the signal generation module generates the frequency f with time delay according to the calculated time delay resultIs low inThe sinusoidal pulse signals are loaded to the transducer array after being amplified by the power amplification module to excite SH0 mode ultrasonic guided waves. After the ultrasonic guided wave is subjected to grid focusing detection, the echo of the ultrasonic guided wave is induced by the transducer array and sequentially passes through the signal amplification module and the signal acquisition module to form a digital signal, and the signal of each channel is subjected to time delay processing by a computer, so that an ultrasonic guided wave focusing detection signal of the grid can be obtained. And traversing all the grids to obtain a low-frequency ultrasonic guided wave quick scanning image.
The nth channel delay delta t of the transducer arrayn is lowIt can be calculated by the following formula:
wherein ln is lowRepresenting the distance between the nth channel transducer and the center of the grid on the surface of the pipeline when the low-frequency ultrasonic guided wave is rapidly scanned, iIs low inRepresenting the axial distance between the transducer array and the center of the grid c during the rapid scanning of the low-frequency ultrasonic guided waveg is lowRepresenting the SH0 modal ultrasonic guided wave obtained by solving an ultrasonic guided wave frequency dispersion characteristic calculation program during the quick scanning of the low-frequency ultrasonic guided wave at the frequency fIs low inGroup velocity of time.
When the ultrasonic guided wave is excited, the nth channel is delayed by delta tn is lowThe calculation formula takes a negative sign to represent the advance of the channel based on the reference time; when receiving the ultrasonic guided wave, the nth channel delays time delta tn is lowThe calculation formula takes a positive sign and represents the hysteresis amount of the channel based on the reference time.
As shown in fig. 3, the high-frequency ultrasonic guided-wave fine detailed inspection mode according to the present invention performs high-frequency ultrasonic guided-wave fine detailed inspection in a region where a pipeline has a defect by using a characteristic that an ultrasonic guided-wave has a high detection resolution at a high frequency. After the fine detailed investigation region of the high-frequency ultrasonic guided wave of the pipeline is determined, the computer configures the matrix switch to a high-frequency fine detailed investigation mode, and divides the pipeline detection region into grids according to the detailed investigation offset. The detail checking offset is determined according to the half wavelength of the adopted ultrasonic guided wave. The computer calculates the time delay of each channel according to the distance between the grid center and each channel of the transducer array, and each channel of the signal generation module generates the frequency f with time delay according to the calculated time delay resultHeight ofThe sinusoidal pulse signals are loaded to the transducer array after being amplified by the power amplification module to excite SH0 mode ultrasonic guided waves. After the ultrasonic guided wave is subjected to grid focusing detection, echoes of the ultrasonic guided wave are sensed by the transducer array and sequentially pass through the signal amplification module and the signal acquisition module to form digital signals, and signals of all channels are subjected to time delay processing by a computer, so that ultrasonic guided wave focusing detection signals of the grid can be obtained. And traversing all the grids to obtain a high-frequency ultrasonic guided wave detailed examination image.
The nth channel delay delta t of the transducer arrayn is highIt can be calculated by the following formula:
wherein ln is highRepresenting the distance between the nth channel transducer and the center of the grid on the surface of the pipeline when the high-frequency ultrasonic guided wave is finely searched, iHeight ofRepresenting the axial distance between the transducer array and the center of the grid during fine detail investigation of the high-frequency ultrasonic guided wave, cg is highRepresenting SH0 modal ultrasonic guided wave obtained by solving ultrasonic guided wave frequency dispersion characteristic calculation program at frequency fHeight ofGroup velocity of time.
When the ultrasonic guided wave is excited, the nth channel is delayed by delta tn is highThe calculation formula takes a negative sign to represent the advance of the channel based on the reference time; when receiving the ultrasonic guided wave, the nth channel delays time delta tn is highThe calculation formula takes a positive sign and represents the hysteresis amount of the channel based on the reference time.
As shown in fig. 4, the ultrasonic guided wave pipeline detection apparatus capable of realizing multi-resolution focused imaging provided by the present invention includes a computer software and hardware part, an ultrasonic guided wave excitation part, an ultrasonic guided wave receiving part, and a configurable ultrasonic guided wave transducer array.
The computer software and hardware part realizes the functions of calculating the frequency dispersion characteristic of the ultrasonic guided wave, controlling the generation and the receiving of the ultrasonic guided wave signals of each channel, configuring the working mode of each channel of the ultrasonic guided wave transducer array, processing the ultrasonic guided wave multi-resolution focused image and the like.
The ultrasonic guided wave excitation part comprises a signal generation module and a power amplification module. The signal generating module generates a sine pulse signal under the control of a computer, and the sine pulse signal is amplified into a power signal which can be applied to the ultrasonic guided wave transducer through the power amplifying module.
The ultrasonic guided wave receiving part comprises a signal amplification module and a signal acquisition module. The signal amplification module conditions the weak signals received by the ultrasonic guided wave transducers of all channels into signals suitable for the signal acquisition module, and the signal acquisition module converts the analog signals conditioned by the signal amplification module into digital signals and transmits the digital signals to a computer.
The configurable ultrasonic guided wave transducer array comprises a matrix switch and an ultrasonic guided wave transducer array, and the ultrasonic guided wave transducer array can be configured into a low-frequency rapid scanning mode and a high-frequency fine detailed scanning mode by configuring the matrix switch through a computer.
As shown in fig. 5, the ultrasonic guided wave transducer according to the present invention is based on the magnetostrictive principle, and has a structure including, from the outside to the inside, a coil layer, a magnetostrictive transducer sheet layer, and an epoxy resin coupling layer in this order. The excitation magnetic field generated by the coil layer is orthogonal to the pre-magnetization magnetic field of the magnetostrictive transducer layer, SH0 mode ultrasonic guided waves are formed on the magnetostrictive transducer layer by the Wednman effect, and the ultrasonic guided waves are coupled to the pipeline through the epoxy resin coupling layer. The ultrasonic guided wave transducers are uniformly distributed on the circumference of the pipeline to form an ultrasonic guided wave transducer array.
As shown in fig. 6, the coil layer of the ultrasonic guided wave transducer according to the present invention is configured with a matrix switch to switch between a low-frequency fast scanning mode and a high-frequency fine scanning mode. The width of a basic transduction unit of the ultrasonic guided wave transducer is fixed to be a quarter wavelength, and because the speed of the ultrasonic guided wave in the SH0 mode does not change along with the frequency, if the low-frequency quick scanning frequency is half of the high-frequency fine detailed scanning frequency, the width of the basic transduction unit selected in the low-frequency quick scanning mode is twice as wide as the width of the basic transduction unit selected in the high-frequency fine detailed scanning mode. When the matrix switch is configured to be in a low-frequency quick scanning mode, coils of the unit 1 and the unit 2 are connected in series to form a basic transduction unit coil, coils of the unit 3 and the unit 4 are connected in series to form a basic transduction unit coil, and meanwhile, a basic transduction unit coil signal formed by connecting the unit 1 and the unit 2 in series is delayed by a quarter period relative to a basic transduction unit coil signal formed by connecting the unit 3 and the unit 4 in series. When the matrix switch is configured in a high-frequency fine detail inspection mode, the coils of the unit 1, the unit 2, the unit 3 and the unit 4 respectively form basic transduction unit coils, and signals of the coils of the unit 1, the unit 2 and the unit 3 are respectively delayed for three-quarter periods, one-half periods and one-quarter periods relative to signals of the coils of the unit 4.
As shown in the attached figure 7, the method and the device of the invention are adopted to carry out low-frequency quick scanning on the area near the artificial defect with the diameter of 10mm and the depth of 4mm in the pipeline with the outer diameter of 273mm and the wall thickness of 8mm to obtain an imaging picture. The low-frequency rapid scanning frequency is 64kHz, the scanning area is a 30mm multiplied by 30mm area which takes an artificial defect as a center, the scanning area is divided into 24 multiplied by 24 grids, and the ultrasonic guided waves are focused at the center of each grid. The low-frequency ultrasonic guided wave fast scanning image can roughly determine the position of the artificial defect, but the edge characteristics of the artificial defect are fuzzy.
As shown in fig. 8, the maximum value of the low-frequency fast scanning image signal is decreased to-6 dB as a threshold, the grids with the amplitude larger than the threshold in the low-frequency fast scanning image signal are retrieved for high-frequency fine detailed scanning, and the high-frequency ultrasonic guided wave fine detailed scanning result is superimposed to the grid region corresponding to the low-frequency ultrasonic guided wave fast scanning image to generate an ultrasonic guided wave multi-resolution focused image. The high-frequency fine detailed investigation frequency is 128kHz, each grid of the high-frequency fine detailed investigation region is thinned into 4 multiplied by 4 grids, and the ultrasonic guided waves are focused at the center of each thinned grid. Compared with a low-frequency ultrasonic guided wave rapid scanning image, the high-frequency ultrasonic guided wave fine detail scanning image has the advantage that the characterization capability of the defect edge is remarkably improved.
Therefore, the method for roughly positioning the defect through global fast low-frequency scanning, performing high-frequency fine detailed scanning in the defect region, and generating the ultrasonic guided wave multi-resolution focused image by combining the low-frequency fast scanning and high-frequency fine detailed scanning information solves the contradiction between the ultrasonic guided wave detection resolution and the detection efficiency, and has remarkable technical effects.
The foregoing detailed description is to be construed as merely illustrative, and not a limitation of the invention, and any modifications and variations of the present invention are intended to fall within the spirit and scope of the appended claims.
Claims (3)
1. An ultrasonic guided wave pipeline detection method capable of realizing multi-resolution focused imaging comprises the following steps:
(1) calculating the frequency dispersion characteristic of ultrasonic guided wave adopted by pipeline detection
Solving the frequency dispersion characteristic of the SH0 modal ultrasonic guided wave through a commercial ultrasonic guided wave frequency dispersion characteristic calculation program according to the geometric dimensions such as the inner diameter and the outer diameter of the pipeline and the material mechanical parameters such as the Young modulus, the Poisson ratio and the like;
(2) determining detection area of ultrasonic guided wave focusing imaging
According to the working condition of the pipeline, a detector pre-judges a pipeline region possibly having defects and determines a detection region of ultrasonic guided wave focusing imaging;
(3) low-frequency ultrasonic guided wave rapid scanning detection area
When the low-frequency rapid scanning is carried out, the matrix switch is configured into a low-frequency rapid scanning mode, meanwhile, the pipeline detection area is divided into grids according to scanning offset, ultrasonic guided wave focusing detection is carried out on each grid, all the grids in the scanning area are traversed, and a low-frequency ultrasonic guided wave rapid scanning image can be obtained;
(4) analyzing the quick scanning result of the low-frequency ultrasonic guided wave and determining the fine detailed scanning area of the high-frequency ultrasonic guided wave
Taking the maximum value drop-6 dB of the image signal as a threshold value, and searching the grids with the amplitude value larger than the threshold value as a fine detail searching area of the high-frequency ultrasonic guided wave;
(5) high-frequency ultrasonic guided wave fine detail inspection of defect vicinity area
When high-frequency fine detailed investigation is carried out, the matrix switch is configured to be in a high-frequency fine detailed investigation mode, meanwhile, grids are divided in a high-frequency ultrasonic guided wave fine detailed investigation region of the pipeline according to detailed investigation offset, ultrasonic guided wave focusing detection is carried out on each grid, all grids in the high-frequency ultrasonic guided wave fine detailed investigation region are traversed, and a high-frequency ultrasonic guided wave fine detailed investigation image can be obtained;
(6) synthesizing an ultrasound guided wave multi-resolution focused image
And the computer superimposes the high-frequency ultrasonic guided wave fine detailed inspection image of the area near the defect to the grid area corresponding to the low-frequency ultrasonic guided wave scanning image to generate an ultrasonic guided wave multi-resolution focusing image.
2. The ultrasonic guided wave pipeline detection device capable of realizing multi-resolution focusing imaging for implementing the method in claim 1 is characterized in that: the ultrasonic guided wave energy conversion system comprises a computer software and hardware part, an ultrasonic guided wave excitation part, an ultrasonic guided wave receiving part and a configurable ultrasonic guided wave transducer array;
the computer software and hardware part realizes the functions of calculating the frequency dispersion characteristic of the ultrasonic guided wave, controlling the generation and the reception of the ultrasonic guided wave signals of each channel, configuring the working mode of each channel of the ultrasonic guided wave transducer array, processing the ultrasonic guided wave multi-resolution focused image and the like;
the ultrasonic guided wave excitation part comprises a signal generation module and a power amplification module, wherein the signal generation module generates a sinusoidal pulse signal under the control of a computer, and the sinusoidal pulse signal is amplified into a power signal which can be applied to the ultrasonic guided wave transducer through the power amplification module;
the ultrasonic guided wave receiving part comprises a signal amplifying module and a signal collecting module, wherein the signal amplifying module conditions the weak signals received by the ultrasonic guided wave transducers of all channels into signals suitable for the signal collecting module, and the signal collecting module converts the analog signals conditioned by the signal amplifying module into digital signals and transmits the digital signals to a computer;
the configurable ultrasonic guided wave transducer array comprises a matrix switch and an ultrasonic guided wave transducer array, and the ultrasonic guided wave transducer array can be configured into a low-frequency rapid scanning mode and a high-frequency fine detail scanning mode by configuring the matrix switch through a computer.
3. The ultrasonic guided wave pipeline detection device capable of realizing multi-resolution focused imaging according to claim 2, characterized in that: the transducer of each channel of the ultrasonic guided wave transducer array is designed based on the magnetostrictive principle and comprises a coil layer, a magnetostrictive transducer sheet layer and an epoxy resin coupling layer, and the matrix switch realizes the switching of a low-frequency quick scanning mode and a high-frequency fine detailed scanning mode by configuring the coil layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911191148.7A CN110849976A (en) | 2019-11-28 | 2019-11-28 | Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911191148.7A CN110849976A (en) | 2019-11-28 | 2019-11-28 | Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110849976A true CN110849976A (en) | 2020-02-28 |
Family
ID=69606542
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911191148.7A Pending CN110849976A (en) | 2019-11-28 | 2019-11-28 | Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110849976A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666561A (en) * | 2020-12-01 | 2021-04-16 | 飞依诺科技(苏州)有限公司 | Ultrasonic scanning system, equipment, method and terminal |
| CN112686846A (en) * | 2020-12-23 | 2021-04-20 | 北京航天特种设备检测研究发展有限公司 | Imaging processing method, equipment and computer readable storage medium |
| CN113358751A (en) * | 2021-06-01 | 2021-09-07 | 中车青岛四方机车车辆股份有限公司 | Workpiece defect detection method, device and system |
| CN113686969A (en) * | 2021-09-08 | 2021-11-23 | 东南大学 | On-line monitoring system and monitoring method for structural health of vehicle-mounted hydrogen storage cylinder |
| CN114813945A (en) * | 2022-04-22 | 2022-07-29 | 国网湖北省电力有限公司十堰供电公司 | Cable shaft fireproof plugging defect detection and signal processing method based on ultrasonic guided waves |
| CN115032269A (en) * | 2022-05-30 | 2022-09-09 | 西南石油大学 | Method for detecting deposited sulfur in high-sulfur natural gas conveying pipeline based on ultrasonic guided waves |
| CN116363038A (en) * | 2023-06-02 | 2023-06-30 | 深圳英美达医疗技术有限公司 | Ultrasonic image fusion method, device, computer equipment and storage medium |
-
2019
- 2019-11-28 CN CN201911191148.7A patent/CN110849976A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112666561A (en) * | 2020-12-01 | 2021-04-16 | 飞依诺科技(苏州)有限公司 | Ultrasonic scanning system, equipment, method and terminal |
| CN112666561B (en) * | 2020-12-01 | 2023-09-22 | 飞依诺科技股份有限公司 | Ultrasonic scanning system, device, method and terminal |
| CN112686846A (en) * | 2020-12-23 | 2021-04-20 | 北京航天特种设备检测研究发展有限公司 | Imaging processing method, equipment and computer readable storage medium |
| CN112686846B (en) * | 2020-12-23 | 2024-05-28 | 北京航天特种设备检测研究发展有限公司 | Imaging processing method, device and computer readable storage medium |
| CN113358751A (en) * | 2021-06-01 | 2021-09-07 | 中车青岛四方机车车辆股份有限公司 | Workpiece defect detection method, device and system |
| CN113686969A (en) * | 2021-09-08 | 2021-11-23 | 东南大学 | On-line monitoring system and monitoring method for structural health of vehicle-mounted hydrogen storage cylinder |
| CN113686969B (en) * | 2021-09-08 | 2022-11-08 | 东南大学 | On-line monitoring system and monitoring method for structural health of vehicle-mounted hydrogen storage cylinder |
| CN114813945A (en) * | 2022-04-22 | 2022-07-29 | 国网湖北省电力有限公司十堰供电公司 | Cable shaft fireproof plugging defect detection and signal processing method based on ultrasonic guided waves |
| CN114813945B (en) * | 2022-04-22 | 2024-02-23 | 国网湖北省电力有限公司十堰供电公司 | Cable shaft fireproof blocking defect detection method based on ultrasonic guided waves |
| CN115032269A (en) * | 2022-05-30 | 2022-09-09 | 西南石油大学 | Method for detecting deposited sulfur in high-sulfur natural gas conveying pipeline based on ultrasonic guided waves |
| CN116363038A (en) * | 2023-06-02 | 2023-06-30 | 深圳英美达医疗技术有限公司 | Ultrasonic image fusion method, device, computer equipment and storage medium |
| CN116363038B (en) * | 2023-06-02 | 2024-06-07 | 深圳英美达医疗技术有限公司 | Ultrasonic image fusion method, device, computer equipment and storage medium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110849976A (en) | Ultrasonic guided wave multi-resolution focusing imaging pipeline detection method and device | |
| WO2018133179A1 (en) | Multi-mode electromagnetic ultrasonic and magnetic flux leakage detection method, apparatus and system, and sensor | |
| CN111122700B (en) | Method for improving laser ultrasonic SAFT defect positioning speed | |
| CN110045019A (en) | A kind of thin plate Air Coupling ultrasonic Lamb waves total focus imaging detection method | |
| CN103901109A (en) | Phased array ultrasonic detection device and method for inner defects of composite insulator | |
| CN105699492A (en) | An ultrasonographic method used for weld seam detection | |
| Liu et al. | Adhesive debonding inspection with a small EMAT in resonant mode | |
| Michaels et al. | Application of acoustic wavefield imaging to non‐contact ultrasonic inspection of bonded components | |
| CN203981638U (en) | A kind of phased array ultrasonic detection device of composite insulator inherent vice | |
| CN102401814A (en) | Method for scanning ultrasonic microscope to image by means of multi-layer scanning simultaneously | |
| CN109115878A (en) | A kind of bridge prestress pore channel mud jacking compactness supersonic detection device and its detection method | |
| CN106802323A (en) | A kind of ultrasonic total focus imaging system based on complete matrix data | |
| CN105424804A (en) | Ultrasonic detecting method for defect of remanufactured composite part | |
| CN113075297B (en) | Titanium alloy phased array linear array ultrasonic detection sound field model construction method | |
| CN110646512A (en) | Single-channel bidirectional transmitting-receiving ultrasonic guided wave pipeline monitoring system and imaging method | |
| CN108613646A (en) | For the array electromagnetic acoustic resonance probe and method of rough surface metal thickness measuring | |
| Lee et al. | Damage detection in a plate using beam-focused shear-horizontal wave magnetostrictive patch transducers | |
| CN110849962A (en) | Device and method for evaluating trend and depth of metal crack by utilizing electromagnetic ultrasonic principle | |
| CN111665296B (en) | Method and device for measuring three-dimensional radiation sound field of ultrasonic transducer based on EMAT | |
| Chong et al. | Statistical threshold determination method through noise map generation for two dimensional amplitude and time-of-flight mapping of guided waves | |
| CN108663434A (en) | A kind of coarse grain material total focus detection method of phased array supersonic defectoscope | |
| CN117169231A (en) | Composite material nondestructive testing system based on acousto-optic technology | |
| CN115389625B (en) | Double-sided ultrasonic imaging method for detecting out-of-plane fiber bending of composite material | |
| CN112162036B (en) | Health monitoring system and method for regular triangle phased array bolt fastening structure | |
| CN104807882B (en) | The supersonic detection method and system of a kind of composite and metal heat pipe brazing quality |
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 |