CN112964788A - Acoustic emission and visualization combined pipeline dynamic pitting process monitoring experiment device - Google Patents
Acoustic emission and visualization combined pipeline dynamic pitting process monitoring experiment device Download PDFInfo
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Abstract
The invention discloses a dynamic pitting process monitoring experimental device for a pipeline, which combines acoustic emission and visualization, and comprises a flowing medium water pipe system, wherein an electrochemical pitting system is arranged at the upper end of the flowing medium water pipe system, the electrochemical pitting system and the flowing medium water pipe system are installed in a penetrating way, a digital image related testing system is movably installed above the electrochemical pitting system, the right end of the electrochemical pitting system is movably provided with the acoustic emission detection system, the invention reduces the influence of flow noise in the real operation process of the pipeline, the experiment is carried out through different grooves, so that the synchronous detection of images and acoustic signals in the pitting corrosion processes of different shapes of the pipeline is realized, useful acoustic emission signals in the pitting corrosion processes are extracted, the external phenomena and the acoustic emission signal mechanism of the pitting corrosion of different shapes are analyzed, the relation between the pitting corrosion processes and the acoustic emission signals is established, and a theoretical basis is laid for the real-time acoustic emission detection and early warning of pitting damage in the operation of equipment.
Description
Technical Field
The invention relates to the technical field of pipeline damage acoustic emission monitoring, in particular to a pipeline dynamic pitting process monitoring experimental device combining acoustic emission and visualization.
Background
The acoustic emission detection method is different from other conventional nondestructive detection methods in many aspects, and has the advantages that the acoustic emission is a dynamic detection method, stress waves generated by internal changes of materials can be received, energy detected by the acoustic emission comes from an object to be detected, and the energy is not provided by a nondestructive detection instrument like an ultrasonic or ray inspection method, and the characteristic determines that the acoustic emission technology is a healthy 'stethoscope' for equipment and can monitor station pipelines with various pipe diameters and wall thicknesses.
The acoustic emission is used as a common nondestructive detection method, three typical acoustic emission signals of hydrogen bubbles, film breakage and corrosion pit growth generated in the pitting process can be received, the method is an effective means for continuously monitoring the pitting corrosion of the test piece, and the pitting corrosion expansion condition can be read in real time through a series of acoustic emission data. However, in the process of monitoring the pipeline, the acoustic emission signal is often accompanied by continuous flow noise, the flow noise affects and even covers the corrosive acoustic emission signal, an experimental device capable of researching the pitting acoustic emission signal under the background of the flow noise is absent at present, and therefore, the pipeline dynamic pitting process monitoring experimental device combining the acoustic emission and visualization is provided.
Disclosure of Invention
The invention aims to provide a pipeline dynamic pitting process monitoring experimental device combining acoustic emission and visualization, which aims to solve the problems that the acoustic emission provided in the background technology is taken as a common nondestructive detection method, three typical acoustic emission signals, namely hydrogen bubbles, film rupture and pit growth, generated in the pitting process can be received, the device is an effective means for continuously monitoring the pitting of a test piece, and the pitting expansion condition can be read in real time through a series of acoustic emission data. However, in the process of monitoring the pipeline, the acoustic emission signal is always accompanied by continuous flow noise, the flow noise can influence and even cover the corrosive acoustic emission signal, and the problem that an experimental device capable of researching the pitting acoustic emission signal under the background of the flow noise is lacked at present is solved.
In order to achieve the purpose, the invention provides the following technical scheme: the dynamic pipeline pitting process monitoring experiment device combining acoustic emission with visualization comprises a flowing medium water pipe system, wherein an electrochemical pitting system is mounted at the upper end of the flowing medium water pipe system, the electrochemical pitting system and the flowing medium water pipe system are mounted in a penetrating mode, a digital image related testing system is movably mounted above the electrochemical pitting system, and an acoustic emission detection system is movably mounted at the right end of the electrochemical pitting system.
As a further scheme of the invention: the flowing medium water pipe system comprises two groups of reducing pipes, the two groups of reducing pipe inner side surface center coaxial fixed mounting is provided with a pipeline body, four surface middle parts of the pipeline body outer side surface are respectively provided with grooves with different shapes, the grooves are respectively square, circular, triangular and oval, the two groups of reducing pipe outer side surface center is penetrated through and installed with a connecting pipe, two tail ends of the connecting pipe are connected with a water tank, the water tank is arranged at the lower end of the pipeline body, a pump is arranged at the lower end of the left side of the connecting pipe in a penetrating mode, and the pump is arranged at the left end.
As a further scheme of the invention: the electrochemistry pitting system includes the corrosive solution pond, the corrosive solution pond is whole to be made for organic glass, the inside corrosive liquid that is provided with in corrosive solution pond, corrosive solution bottom center runs through and has seted up little round hole, little round hole lateral surface covers in the grooved surface of pipeline body lateral surface, and little round hole communicates with each other with the pipeline body, the inside left side top movable mounting in corrosive solution pond has the reference electrode, and the reference electrode lower extreme arranges in the corrosive liquid, the inside right side top movable mounting in corrosive solution pond has auxiliary electrode, and the auxiliary electrode lower extreme arranges in the corrosive liquid.
As a further scheme of the invention: an electrochemical workstation is installed on the right side of the corrosive solution pool, three groups of leads are movably installed on the left side of the center of the end face of the electrochemical workstation, and the three groups of leads are respectively connected with the auxiliary electrode, the reference electrode and the pipeline body.
As a further scheme of the invention: the acoustic emission detection system comprises two sets of acoustic emission sensors, wherein the two sets of acoustic emission sensors are arranged at two ends of the outer side surface of the pipeline body respectively, the two sets of acoustic emission sensors are connected with the outer side surface of the pipeline body through a coupling agent, an amplifier is arranged at the upper end of each acoustic emission sensor, an acoustic emission detector is arranged at the upper end of each amplifier, the amplifiers are connected with the two sets of acoustic emission sensors and the acoustic emission detector through a signal line respectively, and the right side of the acoustic emission detector is connected with a computer.
As a further scheme of the invention: the digital image related testing system comprises two groups of industrial cameras, wherein the industrial cameras are arranged above two sides of the corrosive solution pool respectively, lenses are aligned to the joint of a small bottom round hole of the corrosive solution pool and a pipeline body, a tripod is installed at the lower end of each industrial camera, the main control computer is installed at the upper end of each industrial camera, the left side of the main control computer is connected with a computer, the left side of the main control computer is connected with a signal line II, and the lower end of the signal line II is connected with the two groups of industrial cameras respectively.
Compared with the prior art, the invention has the beneficial effects that: the monitoring experiment device for combining the acoustic emission and the visualization in the dynamic pitting process of the pipeline containing the flowing noise is provided with a pipeline body and an acoustic emission detection system, when an experimenter connects an acoustic emission detector and an industrial camera with a computer before the beginning of an experiment, calibrates the sensitivity of an acoustic emission sensor by using a label breaking experiment, selects a proper acoustic emission threshold experiment on the computer, connects the pipeline body with a reducer pipe through a flange, opens a pump to pump water from a water tank, keeps a medium flowing in the pipeline body all the time, starts an electrochemical workstation, forms pitting corrosion on the groove of the pipeline body by using each electrode and a corrosive solution through a bottom small round hole of a corrosive solution pool, aims at the joint of the bottom small round hole and the pipeline body from two angles above, fixes the industrial camera by using a professional tripod, keeps the image clear and stable, and acquires an acoustic emission signal through the acoustic emission sensor in the acoustic emission detection system in the corrosion process, then the signal is amplified by the amplifier and transmitted to the acoustic emission detector for analysis and storage, and finally transmitted to the computer for data storage, the monitoring experiment device combining the acoustic emission and visualization in the dynamic pitting process of the pipeline containing the flow noise restores the flow noise influence in the real running process of the pipeline body by arranging the pipeline body and the acoustic emission detection system, and simultaneously adopts the pipeline with the square outer diameter and the circular inner diameter, grooves with different shapes are arranged on the four surfaces of the outer diameter, and through experiments by utilizing the different grooves, the method can realize the synchronous detection of images and acoustic signals in the process of pitting corrosion of different shapes of pipelines, extract useful acoustic emission signals in the process of pitting corrosion, analyze the external phenomena of pitting corrosion of different shapes and the mechanism of the acoustic emission signals, establish the relation between the pitting corrosion process and the acoustic emission signals, and lay a theoretical foundation for the real-time acoustic emission detection and early warning of pitting damage in the operation process of equipment.
The monitoring experiment device integrated structure combining the dynamic pitting process acoustic emission and the visualization of the pipeline containing the flowing noise is provided with a digital image related testing system and a flowing medium water pipe system, the monitoring experiment device combining the dynamic pitting process acoustic emission and the visualization of the pipeline containing the flowing noise utilizes an industrial camera in the digital image testing system to continuously collect d surface images of pitting pits, collect pictures of bubble generation, film rupture and pit expansion, transmit the pictures to a main control computer, collect and analyze information through collection and analysis software on the main control computer, integrate and analyze statistical data by a computer, disassemble a pipeline body during a second experiment, combine the surfaces of different grooves with a corrosive solution pool, and repeat the experiment steps. Therefore, data combination of pitting corrosion, image information and acoustic emission information in different shapes is realized, three typical acoustic emission signals of hydrogen bubble generation, film rupture and pit growth in the acoustic emission signals are extracted, and the acoustic emission signals are distinguished from flow noise signals. The monitoring experiment device integrated structure combining the dynamic pitting process acoustic emission and visualization of the pipeline containing the flowing noise has the characteristics of simple structure, flexible operation, adjustable flowing noise, stopping along with the process, and the like, and can be widely applied to the research of the pitting initiation and expansion behaviors of the metal pipeline under different water speeds and different corrosion strengths.
Drawings
FIG. 1 is a schematic structural diagram of a dynamic pipeline pitting process monitoring experimental device combining acoustic emission and visualization according to the present invention;
FIG. 2 is a schematic diagram of the overall structure of an electrochemical pitting system and a digital image-related testing system in the pipeline dynamic pitting process monitoring experimental device combining acoustic emission and visualization according to the present invention;
FIG. 3 is a side view of an electrochemical pitting system and a digital image-related testing system in the pipeline dynamic pitting process monitoring experimental apparatus combining acoustic emission and visualization according to the present invention;
FIG. 4 is a side view of each section of a pipeline in the pipeline dynamic pitting process monitoring experiment device combining acoustic emission and visualization.
In the figure: 1. a reducer pipe; 2. a pipeline; 3. a pump; 4. a water tank; 5. a corrosive solution tank; 6. a reference electrode; 7. an auxiliary electrode; 8. an electrochemical workstation; 9. an acoustic emission sensor; 10. an amplifier; 11. an acoustic emission detector; 12. an industrial camera; 13. a main control machine; 14. a computer; 15. corrosive liquid; 16. a tripod; 17. a small circular hole; 18. a flowing medium water conduit system; 19. an electrochemical pitting system; 20. an acoustic emission detection system; 21. digital image correlation test system.
Detailed Description
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.
Referring to fig. 1-4, the present invention provides a technical solution: the dynamic pipeline pitting process monitoring experiment device combining acoustic emission with visualization comprises a flowing medium water pipe system 18, wherein an electrochemical pitting system 19 is mounted at the upper end of the flowing medium water pipe system 18, the electrochemical pitting system 19 and the flowing medium water pipe system 18 are installed in a penetrating mode, a digital image related testing system 21 is movably mounted above the electrochemical pitting system 19, and an acoustic emission detection system 20 is movably mounted at the right end of the electrochemical pitting system 19.
The flowing medium water pipe system 18 comprises two groups of reducer pipes 1, the pipeline body 2 is coaxially and fixedly mounted at the centers of the inner side surfaces of the two groups of reducer pipes 1, grooves with different shapes are respectively formed in the middle parts of the four surfaces of the outer side surface of the pipeline body 2, the grooves are square, circular, triangular and oval, a connecting pipe is installed in the center of the outer side surface of the two groups of reducer pipes 1 in a penetrating mode, the two tail ends of the connecting pipe are connected with a water tank 4, the water tank 4 is arranged at the lower end of the pipeline body 2, a pump 3 is installed at the lower end of the left side.
Through the technical scheme: the monitoring experiment device for combining the dynamic pitting process acoustic emission and the visualization of the pipeline containing the flowing noise is provided with a digital image related testing system 21 and a flowing medium water pipe system 18 in an overall structure, the monitoring experiment device for combining the dynamic pitting process acoustic emission and the visualization of the pipeline containing the flowing noise utilizes an industrial camera 12 in the digital image testing system to continuously collect 3d surface images of pitting pits, collect images of bubble generation, film rupture and pit expansion, transmit the images to a main control computer 13, collect and analyze information through collection and analysis software on the main control computer 13, integrate, analyze and process statistical data by a computer 14, detach a pipeline body 2 during a second experiment, combine the surfaces of different grooves with a corrosive solution pool 5, and repeat the experiment steps. Therefore, data combination of pitting corrosion, image information and acoustic emission information in different shapes is realized, three typical acoustic emission signals of hydrogen bubble generation, film rupture and pit growth in the acoustic emission signals are extracted, and the acoustic emission signals are distinguished from flow noise signals. Therefore, the external phenomena of the pitting corrosion with different shapes and the mechanism of the acoustic emission signal are analyzed, the relation between the pitting corrosion process and the acoustic emission signal is established, and the whole structure of the monitoring experiment device which combines the acoustic emission and the visualization of the dynamic pitting corrosion process of the pipeline with the flowing noise is provided with the digital image related test system 21 and the flowing medium water pipe system 18, so that the whole monitoring experiment device which combines the acoustic emission and the visualization of the dynamic pitting corrosion process of the pipeline with the flowing noise has the characteristics of simple structure, flexible operation, adjustable flowing noise, stopping along with the flow and the like, and can be widely applied to the research on the pitting corrosion initiation and expansion behaviors of the metal pipeline under different water velocities and different corrosion strengths.
The electrochemical pitting system 19 comprises a corrosive solution pool 5, the corrosive solution pool 5 is integrally made of organic glass, corrosive liquid 15 is arranged inside the corrosive solution pool 5, a small round hole 17 penetrates through the center of the bottom of the corrosive solution pool 5, the outer side face of the small round hole 17 covers the groove face of the outer side face of the pipeline body 2, the small round hole 17 is communicated with the pipeline body 2, a reference electrode 6 is movably arranged above the left side inside the corrosive solution pool 5, the lower end of the reference electrode 6 is arranged in the corrosive liquid 15, an auxiliary electrode 7 is movably arranged above the right side inside the corrosive solution pool 5, and the lower end of the auxiliary electrode 7 is arranged in the corrosive liquid 15.
An electrochemical workstation 8 is installed on the right side of the corrosive solution pool 5, three groups of leads are movably installed on the left side of the center of the end face of the electrochemical workstation 8, and the three groups of leads are respectively connected with the auxiliary electrode 7, the reference electrode 6 and the pipeline body 2.
The acoustic emission detection system 20 comprises two sets of acoustic emission sensors 9, the two sets of acoustic emission sensors 9 are respectively arranged at two ends of the outer side surface of the pipeline body 2, the two sets of acoustic emission sensors 9 are connected with the outer side surface of the pipeline body 2 through a coupling agent, amplifiers 10 are arranged at the upper ends of the two sets of acoustic emission sensors 9, an acoustic emission detector 11 is arranged at the upper end of each amplifier 10, the amplifiers 10 are respectively connected with the two sets of acoustic emission sensors 9 and the acoustic emission detector 11 through a signal line, and a computer 14 is connected to the right side of each.
The digital image correlation testing system 21 comprises two groups of industrial cameras 12, the two groups of industrial cameras 12 are arranged above two sides of the corrosive solution pool 5 respectively, lenses are aligned to the joint of a small round hole 17 in the bottom of the corrosive solution pool 5 and the pipeline body 2, a tripod 16 is arranged at the lower ends of the two groups of industrial cameras 12, a main control computer 13 is arranged at the upper ends of the two groups of industrial cameras 12, the left side of the main control computer 13 is connected with a computer 14, the left side of the main control computer 13 is connected with a second signal line, and the lower end of the second signal line is connected with the two groups of industrial cameras 12 respectively.
Through the technical scheme: the monitoring experiment device for combining the acoustic emission and visualization of the dynamic pitting process of the pipeline containing the flowing noise is provided with a pipeline body 2 and an acoustic emission detection system 20, when an experimenter connects an acoustic emission detector 11 and an industrial camera 12 with a computer 14 before the experiment begins, calibrates the sensitivity of an acoustic emission sensor 9 by using a label breaking experiment, selects a proper acoustic emission threshold experiment on the computer 14, connects the pipeline body 2 with a reducer pipe 1 through a flange, opens a pump 3 to pump water from a water tank 4, keeps a medium flowing in the pipeline body 2 to start an electrochemical workstation 8 all the time, forms pitting on a groove of the pipeline body 2 through a small bottom round hole 17 of a corrosion solution pool 5 by using each electrode and a corrosion solution, aims at the joint of the small bottom round hole 17 and the pipeline body 2 from two angles above, and fixes the industrial camera 12 by using a professional tripod 16, the monitoring experiment device for the dynamic pitting process acoustic emission and visualization of the pipeline containing the flow noise reduces the influence of the flow noise in the real operation process of the pipeline body 2 by arranging the pipeline body 2 and the acoustic emission detection system 20, simultaneously adopts the pipeline with the square outer diameter and the circular inner diameter, arranges grooves with different shapes on the four surfaces of the outer diameter, can realize the synchronous detection of images and acoustic signals in the pitting process of different shapes of the pipeline by utilizing different grooves for experiments, extracts useful acoustic emission signals in the pitting process, and analyzes the external phenomenon and the acoustic emission signal mechanism of the pitting corrosion with different shapes, the relation between the pitting process and the acoustic emission signal is established, and a theoretical basis is laid for real-time acoustic emission detection and early warning of pitting damage in the operation process of equipment.
The working principle is as follows: for the monitoring experiment device combining the acoustic emission and visualization in the dynamic pitting process of the pipeline containing the flow noise, firstly, an experimenter firstly connects an acoustic emission detector 11 and an industrial camera 12 with a computer 14 before the experiment starts, calibrates the sensitivity of an acoustic emission sensor 9 by using a label breaking experiment, and selects a proper acoustic emission threshold experiment on the computer 14, connects a pipeline body 2 with a reducer pipe 1 through a flange, opens a pump 3 to pump water from a water tank 4, keeps a medium flowing in the pipeline body 2 all the time, starts an electrochemical workstation 8, forms pitting corrosion on a groove of the pipeline body 2 by using each electrode and a corrosive solution through a small circular hole 17 at the bottom of a corrosive solution pool 5, aims at the joint of the small circular hole 17 at the bottom and the pipeline body 2 from two angles above, fixes the industrial camera 12 by using a professional tripod 16, and keeps clear and stable images, in the corrosion process, an acoustic emission signal is obtained by an acoustic emission sensor 9 in an acoustic emission detection system 20, then the signal is amplified by an amplifier 10 and then transmitted to an acoustic emission detector 11 for analysis and storage, and finally transmitted to a computer 14 for data storage, the monitoring experiment device combining the acoustic emission and visualization in the dynamic pitting process of the pipeline containing the flow noise restores the flow noise influence in the real running process of the pipeline body 2 by arranging the pipeline body 2 and the acoustic emission detection system 20, simultaneously adopts a pipeline with square outer diameter and circular inner diameter, and is provided with grooves with different shapes on four surfaces of the outer diameter, and can realize the synchronous detection of images and acoustic signals in the pitting process of different shapes of the pipeline by utilizing different grooves for experiments, extract useful acoustic emission signals in the pitting process of pitting and analyze the external phenomena and acoustic emission signal mechanisms of different shapes, the monitoring experiment device for the dynamic pitting process acoustic emission and visualization of the pipeline containing the flow noise continuously collects 3d surface images of pitting pits by using an industrial camera 12 in a digital image testing system, collects images of bubble generation, film rupture and pit expansion, transmits the images to a main control computer 13, collects and analyzes information by collection and analysis software on the main control computer 13, integrates statistical data by a computer 14 for analysis and processing, can detach a pipeline body 2 during a second experiment, combines the surfaces of different grooves with a corrosion solution pool 5, and repeats the experiment steps. Therefore, data combination of pitting corrosion, image information and acoustic emission information in different shapes is realized, three typical acoustic emission signals of hydrogen bubble generation, film rupture and pit growth in the acoustic emission signals are extracted, and the acoustic emission signals are distinguished from flow noise signals. Therefore, the external phenomena of the pitting corrosion with different shapes and the mechanism of the acoustic emission signal are analyzed, the relation between the pitting corrosion process and the acoustic emission signal is established, and the whole structure of the monitoring experiment device which combines the acoustic emission and the visualization of the dynamic pitting corrosion process of the pipeline with the flowing noise is provided with the digital image related test system 21 and the flowing medium water pipe system 18, so that the whole monitoring experiment device which combines the acoustic emission and the visualization of the dynamic pitting corrosion process of the pipeline with the flowing noise has the characteristics of simple structure, flexible operation, adjustable flowing noise, stopping along with the flow and the like, and can be widely applied to the research on the pitting corrosion initiation and expansion behaviors of the metal pipeline under different water velocities and different corrosion strengths.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Pipeline dynamic pitting process monitoring experiment device that acoustic emission and visual combination combined together, including flow medium water pipe system (18), its characterized in that: an electrochemical pitting system (19) is mounted at the upper end of the flowing medium water pipe system (18), the electrochemical pitting system (19) and the flowing medium water pipe system (18) are installed in a penetrating mode, a digital image related testing system (21) is movably mounted above the electrochemical pitting system (19), and an acoustic emission detecting system (20) is movably mounted at the right end of the electrochemical pitting system (19).
2. The dynamic pipeline pitting process monitoring experiment device combining acoustic emission and visualization as claimed in claim 1, wherein: flowing medium water pipe system (18) are including two sets of reducing pipe (1), and are two sets of reducing pipe (1) the coaxial fixed mounting in medial surface center has pipeline body (2), four face middle parts of pipeline body (2) lateral surface are provided with the recess that the shape is different respectively, and the recess is square, circular, triangle-shaped and oval respectively, and is two sets of reducing pipe (1) lateral surface center runs through installs the connecting pipe, two tail ends of connecting pipe are connected with water tank (4), and pipeline body (2) lower extreme is arranged in water tank (4), connecting pipe left side lower extreme runs through installs pump (3), and water tank (4) left end is arranged in pump (3).
3. The dynamic pipeline pitting process monitoring experiment device combining acoustic emission and visualization as claimed in claim 1, wherein: the electrochemical pitting system (19) comprises a corrosive solution tank (5), the corrosive solution tank (5) is integrally made of organic glass, corrosive solution (15) is arranged inside the corrosive solution tank (5), a small round hole (17) is formed in the center of the bottom of the corrosive solution tank (5) in a penetrating mode, the outer side face of the small round hole (17) is covered on the groove face of the outer side face of the pipeline body (2), the small round hole (17) is communicated with the pipeline body (2), a reference electrode (6) is movably mounted above the left side inside the corrosive solution tank (5), the lower end of the reference electrode (6) is arranged in the corrosive solution (15), an auxiliary electrode (7) is movably mounted above the right side inside the corrosive solution tank (5), and the lower end of the auxiliary electrode (7) is arranged in the corrosive solution (15).
4. The dynamic pipeline pitting process monitoring experiment device combining acoustic emission and visualization as claimed in claim 3, wherein: an electrochemical workstation (8) is installed on the right side of the corrosive solution pool (5), three groups of leads are movably installed on the left side of the center of the end face of the electrochemical workstation (8), and the three groups of leads are respectively connected with an auxiliary electrode (7), a reference electrode (6) and a pipeline body (2).
5. The dynamic pipeline pitting process monitoring experiment device combining acoustic emission and visualization as claimed in claim 1, wherein: acoustic emission detecting system (20) are including two sets of acoustic emission sensor (9), and are two sets of pipeline body (2) lateral surface both ends are arranged respectively in acoustic emission sensor (9), and just two sets of acoustic emission sensor (9) are connected with pipeline body (2) lateral surface through couplant, and are two sets of acoustic emission sensor (9) upper end all is provided with amplifier (10), amplifier (10) upper end is provided with acoustic emission detector (11), and amplifier (10) are connected with two sets of acoustic emission sensor (9) and acoustic emission detector (11) respectively through a signal line, acoustic emission detector (11) right side is connected with computer (14).
6. The dynamic pipeline pitting process monitoring experiment device combining acoustic emission and visualization as claimed in claim 1, wherein: digital image correlation test system (21) is including two sets of industry camera (12), and is two sets of corruption solution pond (5) both sides top is arranged respectively in industry camera (12), and the camera lens aims at the little round hole in bottom (17) of corruption solution pond (5) and the combination department of pipeline body (2), and is two sets of tripod (16) are installed to industry camera (12) lower extreme, and are two sets of main control computer (13) are installed to industry camera (12) upper end, and main control computer (13) left side is connected with computer (14), main control computer (13) left side is connected with No. two signal lines, and No. two signal line lower extremes are connected with two sets of industry camera (12) respectively.
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| CN114002334A (en) * | 2021-09-29 | 2022-02-01 | 西安交通大学 | Structural damage acoustic emission signal identification method and device and storage medium |
| CN114061500A (en) * | 2021-11-10 | 2022-02-18 | 昆明理工大学 | Dynamic monitoring system for pipeline deformation instability based on acoustic emission technology |
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