CN216847596U - Pipeline inner wall corrosion monitoring system based on radio frequency identification sensing - Google Patents
Pipeline inner wall corrosion monitoring system based on radio frequency identification sensing Download PDFInfo
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- CN216847596U CN216847596U CN202220444099.4U CN202220444099U CN216847596U CN 216847596 U CN216847596 U CN 216847596U CN 202220444099 U CN202220444099 U CN 202220444099U CN 216847596 U CN216847596 U CN 216847596U
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Abstract
The utility model discloses a pipeline inner wall corrosion monitoring system based on radio frequency identification sensing relates to pipeline monitoring technology field, include: the RFID tag comprises a magnetizing device, an RFID tag sensor and a reader-writer; the magnetization device is arranged on the measured pipeline and comprises: the permanent magnet type motor comprises an iron core, a first permanent magnet, a first iron block, a second permanent magnet and a second iron block; the RFID label sensor is arranged on the measured pipeline and is positioned on the same side with the magnetizing device; the reader-writer is in wireless communication connection with the RFID label sensor through a reader-writer antenna. The utility model has the advantages of light structure, low cost and high monitoring precision; the installation and the disassembly are easy, and the maintenance is convenient; the method is beneficial to the application of the pipeline inner wall corrosion monitoring technology, and has a great engineering application value.
Description
Technical Field
The utility model relates to a pipeline monitoring technology field, concretely relates to pipeline inner wall corrosion monitoring system based on radio frequency identification sensing.
Background
The pipeline is used as an important basic pressure-bearing member, is widely applied to long-distance transportation of petroleum and natural gas, is the life line of national economy, and the quality of the pipeline is the basis for ensuring safe transportation. However, due to the reasons of stress, electrochemical degradation, vibration, external impact and the like, the inner wall of the pipeline is easy to have the defects of corrosion, loss, cavitation, cracks and the like, and if the defects are not found in time, the later-stage service performance is reduced, even serious safety accidents are caused. In order to ensure the quality of the pipeline, various automatic nondestructive testing methods are generally used for quality testing, such as magnetic flux leakage, ultrasonic guided waves, optical fiber sensors, eddy currents, infrared thermal imaging and the like, and although these methods can effectively monitor the corrosion of the pipeline, the methods have the problems of expensive instruments and huge structures, and are not beneficial to monitoring most of pipelines in severe and extreme natural environments; and the method needs regular detection, complex instruments and cables, is high in cost and is not suitable for large-scale monitoring.
The radio frequency identification technology has the advantages of being passive, wireless and free of maintenance as a non-contact identification technology. The technology can overcome the problems that the pipeline monitoring means needs regular maintenance, and has a huge structure and high cost. However, due to the skin effect, the existing radio frequency identification is mainly applied to monitoring the corrosion of the outer surface of the pipeline, and cannot be applied to the internal corrosion of the pipeline. Therefore, it is necessary to develop a technical means for solving the problem of monitoring the corrosion of the inner wall of the pipeline.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned not enough among the prior art, the utility model provides a pair of pipeline inner wall corrosion monitoring system based on radio frequency identification sensing has solved the unable problem that realizes that the structure is light and handy, with low costs, the precision is high, easily installation and dismantlement of current pipeline monitoring technology.
In order to achieve the purpose of the invention, the utility model adopts the technical scheme that:
a pipeline inner wall corrosion monitoring system based on radio frequency identification sensing comprises: the RFID tag comprises a magnetizing device, an RFID tag sensor and a reader-writer;
the magnetizing device is arranged on a measured pipeline and comprises: the permanent magnet type motor comprises an iron core, a first permanent magnet, a first iron block, a second permanent magnet and a second iron block; the first iron block and the second iron block are both placed on the outer wall of the pipeline to be measured; the first permanent magnet is positioned above the first iron block and fixedly connected with the first iron block; the second permanent magnet is positioned above the second iron block and fixedly connected with the second iron block; the iron core is positioned above the first permanent magnet and the second permanent magnet, one end of the iron core is fixedly connected with the first permanent magnet, and the other end of the iron core is fixedly connected with the second permanent magnet;
the RFID label sensor is arranged on the pipeline to be tested and is positioned on the same side with the magnetizing device;
the reader-writer is in wireless communication connection with the RFID label sensor through a reader-writer antenna.
Further, the RFID tag sensor includes: the system comprises an ultrahigh frequency radio frequency identification chip and a magnetic sensitive patch antenna;
the magneto-sensitive patch antenna includes: the metal radiating patch comprises a metal grounding plate, a dielectric substrate and a metal radiating patch; one surface of the dielectric substrate is fixedly connected with the metal grounding plate, and the other surface of the dielectric substrate is fixedly connected with the metal radiation patch; the middle part of the metal radiation patch is provided with a micro-strip structure, and one end part of the micro-strip structure is fixedly connected with the ultrahigh frequency radio frequency identification chip.
Furthermore, the RFID tag sensor is arranged on the pipeline to be detected in an adhesion mode, and the length direction of the magnetic sensitive patch antenna is perpendicular to the magnetization direction of the magnetization device.
Further, the medium substrate is made of FR-4 materials.
Further, the impedance of the magneto-sensitive patch antenna is conjugated with the impedance of the ultrahigh frequency radio frequency identification chip.
The utility model has the advantages that:
1) the utility model provides a magnetization unit settles on being surveyed the pipeline, constitutes complete magnetic circuit with being surveyed the pipeline, magnetizes being surveyed the pipeline. Under the environment, when the inner wall of the detected pipeline is corroded, the internal corrosion can cause magnetic field distortion, and further cause disturbance of surface permeability. The RFID label sensor attached to the measured pipeline monitors the corrosion state of the inner wall of the pipeline by detecting the disturbance of the magnetic conductivity of the surface of the measured pipeline, and transmits the corrosion state to a reader-writer through wireless signals to perform data interaction. Compared with the prior art, the utility model has the advantages of light structure, low cost and high monitoring precision; the installation and the disassembly are easy, and the maintenance is convenient; the method is beneficial to the application of the pipeline inner wall corrosion monitoring technology, and has a great engineering application value.
2) When the magneto-sensitive patch antenna of the RFID label sensor is pasted on a measured pipeline, the metal grounding plate is fully contacted with the surface of the pipeline, the surface of the pipeline is used as the grounding surface of the antenna to monitor magnetic conductivity distortion caused by corrosion of the inner wall of the pipeline, the metal radiation patch on the other surface of the medium substrate converts disturbance of the magnetic conductivity into the offset of the resonant frequency of the antenna through a microstrip structure, and the offset RFS of the resonant frequency is increased along with the increase of the corrosion depth of the inner wall of the measured pipeline, so that the corrosion monitoring of the inner wall of the pipeline is realized.
3) The impedance of the magnetic sensing patch antenna is conjugated with the impedance of the ultrahigh frequency radio frequency identification chip, so that the impedance matching of the magnetic sensing patch antenna and the ultrahigh frequency radio frequency identification chip is realized, and the signal transmission quality is good.
Drawings
Fig. 1 is a structural diagram of a pipeline inner wall corrosion monitoring system based on radio frequency identification sensing according to an embodiment of the present invention;
FIG. 2 is a block diagram of an RFID tag sensor in accordance with an embodiment of the present invention;
fig. 3 is a scale chart of an RFID tag sensor according to an embodiment of the present invention;
wherein the reference numerals are: 1. a magnetizing device; 2. an RFID tag sensor; 3. a pipe to be tested; 4. a reader/writer; 11. an iron core; 12. a first permanent magnet; 13. a first iron block; 14. a second permanent magnet; 15. a second iron block; 21. a metal ground plate; 22. a dielectric substrate; 23. a metal radiation patch; 24. an ultrahigh frequency radio frequency identification chip; 41. a reader antenna.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and various changes will be apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all inventions contemplated by the present invention are protected.
As shown in fig. 1, in an embodiment of the present invention, a system for monitoring corrosion of an inner wall of a pipeline based on rfid sensing includes: a magnetizing apparatus 1, an RFID tag sensor 2, and a reader/writer 4.
The magnetizing device 1 is arranged on a pipe 3 to be measured and comprises: the permanent magnet motor comprises an iron core 11, a first permanent magnet 12, a first iron block 13, a second permanent magnet 14 and a second iron block 15; the first iron block 13 and the second iron block 15 are both placed on the outer wall of the measured pipeline 3. The first permanent magnet 12 is positioned above the first iron block 13 and fixedly connected with the first iron block 13; the second permanent magnet 14 is positioned above the second iron block 15 and is fixedly connected with the second iron block 15; the iron core 11 is located above the first permanent magnet 12 and the second permanent magnet 14, one end of the iron core is fixedly connected with the first permanent magnet 12, and the other end of the iron core is fixedly connected with the second permanent magnet 14.
The RFID tag sensor 2 is adhesively mounted on the pipe 3 to be measured, and is located on the same side as the magnetizing apparatus 1, as shown in fig. 2, and includes: an ultrahigh frequency radio frequency identification chip 24 and a magneto-sensitive patch antenna. The magneto-sensitive patch antenna includes: a metal ground plate 21, a dielectric substrate 22 and a metal radiating patch 23. The medium substrate 22 is made of FR-4 material, one surface of the medium substrate is fixedly connected with the metal grounding plate 21, and the other surface of the medium substrate is fixedly connected with the metal radiation patch 23; the middle part of the metal radiation patch 23 is provided with a micro-strip structure, and one end part of the micro-strip structure is fixedly connected with the ultrahigh frequency radio frequency identification chip 24. The length direction of the magnetic sensitive patch antenna is vertical to the magnetization direction of the magnetization device 1, and the impedance of the magnetic sensitive patch antenna is conjugated with the impedance of the ultrahigh frequency radio frequency identification chip 24.
The reader/writer 4 is connected to the RFID tag sensor 2 through the reader/writer antenna 41 in wireless communication.
The magnetizing device 1 provided by the embodiment is arranged on the measured pipeline 3, and forms a complete magnetic circuit with the measured pipeline 3 to magnetize the measured pipeline 3. Under the environment, when the inner wall of the detected pipeline 3 is corroded, the internal corrosion can cause magnetic field distortion, and further cause disturbance of surface permeability. The RFID label sensor 2 attached to the measured pipeline 3 monitors the corrosion state of the inner wall of the pipeline by detecting the disturbance of the surface magnetic conductivity of the measured pipeline 3, and transmits the corrosion state to the reader-writer 4 through wireless signals to perform data interaction.
The utility model discloses the scientific principle based on as follows:
from the skin effect, the current losses in the measured pipe 3 are concentrated at the skin depth:
wherein mu is magnetic conductivity, sigma is electric conductivity, and f is frequency, therefore, the resonance frequency offset of the magnetic sensitive patch antenna of the RFID label sensor 2 can reflect the change of the material performance around the area where the surface crack and the internal corrosion of the measured pipeline 3 are positioned.
Resonant frequency f of RFID tag sensor 2resThe expression of (c) is as follows:
wherein c represents the speed of light,. epsilonreDenotes the effective dielectric constant, L denotes the length of the metallic radiating patch 23, Δ LocDenotes the length of compensation, ∈rDenotes a dielectric constant, h denotes a thickness of the dielectric substrate 22, and W denotes a width of the metal radiation patch 23.
When corrosion exists inside the material of the detected pipeline 3, the distribution of the magnetic field is disturbed by the difference of material properties between metal and air. After the magnetic lines of force are extruded, one part of the magnetic lines of force pass through the space of the pipeline above the corrosion part, and the other part of the magnetic lines of force leak into the air on the other side of the corrosion part. According to the distribution rule of the magnetic field, the magnetic field intensity H above the corrosion is strengthened. The change of the magnetic field corresponds to different positions of the mu-H curve of the ferromagnetic material, so that the uneven distribution of the magnetic field caused by corrosion of the inner wall of the pipeline can cause disturbance of the magnetic permeability of the surface of the pipeline, thereby converting the internal corrosion into the disturbance of the magnetic permeability which can be monitored by the RFID tag sensor 2 sensitive to the magnetic permeability.
In order to ensure the metal resistance of the magneto-sensitive patch antenna, a micro-strip structure is adopted, the micro-strip structure is placed on the outer surface of a detected pipeline during working, and the surface of the pipeline is used as the ground plane of the magneto-sensitive patch antenna to monitor the magnetic conductivity distortion caused by the corrosion of the inner wall of the pipeline.
Disturbance of the magnetic field caused by corrosion inside the measured pipe 3 in a magnetized state causes disturbance of the surface permeability. Under the same magnetization, the magnetic permeability of the surface area of the pipeline corresponding to the internal corrosion increases with the increase of the corrosion burial depth, the disturbance of the magnetic permeability can be represented by the resonance frequency of the antenna or the deviation RFS of the resonance frequency, and the RFS increases with the increase of the corrosion depth of the inner wall of the tested pipeline. Due to the extrusion effect of magnetic lines of force caused by defects, the magnetic field intensity in the skin depth layer of the pipeline is increased, and particularly the magnetic field intensity of the crack defect facing area is the maximum. In addition, the shallower the buried depth, the greater the resulting magnetic field change.
The magneto-sensitive patch antenna is designed for an ultrahigh frequency band, corrosion of the inner wall of the pipeline is converted into magnetic conductivity disturbance which can be detected by an ultrahigh frequency radio frequency identification chip 24, and the specific size (the size is schematically shown in figure 3) is designed as shown in table 1:
TABLE 1(mm)
| L | W | Li | Wi | Lc | Wh |
| 69 | 47 | 41 | 9 | 21.3 | 2 |
The impedance of the magnetic sensing patch antenna is conjugated with the impedance of the ultrahigh frequency radio frequency identification chip, so that the impedance matching of the magnetic sensing patch antenna and the ultrahigh frequency radio frequency identification chip is realized, and the signal transmission quality is good.
Compared with the prior art, the utility model has the advantages of light structure, low cost and high monitoring precision; the installation and the disassembly are easy, and the maintenance is convenient; the RFID tag sensor also has the advantages of being passive, wireless and maintenance-free, and manpower and material resources are saved; the utility model discloses still help the application of pipeline inner wall corrosion monitoring technique, have great engineering using value.
The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.
It will be appreciated by those of ordinary skill in the art that the embodiments described herein are intended to assist the reader in understanding the principles of the invention, and it is to be understood that the scope of the invention is not limited to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on the teachings of the present invention without departing from the spirit of the invention, and such modifications and combinations are still within the scope of the invention.
Claims (5)
1. A pipeline inner wall corrosion monitoring system based on radio frequency identification sensing is characterized by comprising: the RFID tag comprises a magnetizing device (1), an RFID tag sensor (2) and a reader-writer (4);
the magnetizing device (1) is arranged on a measured pipeline (3) and comprises: the permanent magnet iron core comprises an iron core (11), a first permanent magnet (12), a first iron block (13), a second permanent magnet (14) and a second iron block (15); the first iron block (13) and the second iron block (15) are both placed on the outer wall of the measured pipeline (3); the first permanent magnet (12) is positioned above the first iron block (13) and fixedly connected with the first iron block (13); the second permanent magnet (14) is positioned above the second iron block (15) and is fixedly connected with the second iron block (15); the iron core (11) is positioned above the first permanent magnet (12) and the second permanent magnet (14), one end of the iron core is fixedly connected with the first permanent magnet (12), and the other end of the iron core is fixedly connected with the second permanent magnet (14);
the RFID label sensor (2) is arranged on the measured pipeline (3) and is positioned on the same side as the magnetizing device (1);
the reader-writer (4) is in wireless communication connection with the RFID tag sensor (2) through a reader-writer antenna (41).
2. The pipe inner wall corrosion monitoring system based on radio frequency identification sensing according to claim 1, wherein the RFID tag sensor (2) comprises: an ultrahigh frequency radio frequency identification chip (24) and a magneto-sensitive patch antenna;
the magneto-sensitive patch antenna includes: a metal grounding plate (21), a dielectric substrate (22) and a metal radiation patch (23); one surface of the dielectric substrate (22) is fixedly connected with the metal grounding plate (21), and the other surface of the dielectric substrate is fixedly connected with the metal radiation patch (23); the middle part of the metal radiation patch (23) is provided with a micro-strip structure, and one end part of the micro-strip structure is fixedly connected with the ultrahigh frequency radio frequency identification chip (24).
3. The pipeline inner wall corrosion monitoring system based on radio frequency identification sensing according to claim 2, wherein the RFID tag sensor (2) is arranged on the pipeline (3) to be tested in an adhesive manner, and the length direction of the magnetic sensitive patch antenna is perpendicular to the magnetization direction of the magnetization device (1).
4. The pipe inner wall corrosion monitoring system based on radio frequency identification sensing of claim 2, wherein the dielectric substrate (22) is of FR-4 material.
5. The system for monitoring corrosion of the inner wall of the pipeline based on the radio frequency identification sensing as claimed in claim 2, wherein the impedance of the magneto-sensitive patch antenna is conjugated with the impedance of the UHF radio frequency identification chip (24).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220444099.4U CN216847596U (en) | 2022-03-01 | 2022-03-01 | Pipeline inner wall corrosion monitoring system based on radio frequency identification sensing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220444099.4U CN216847596U (en) | 2022-03-01 | 2022-03-01 | Pipeline inner wall corrosion monitoring system based on radio frequency identification sensing |
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| CN202220444099.4U Active CN216847596U (en) | 2022-03-01 | 2022-03-01 | Pipeline inner wall corrosion monitoring system based on radio frequency identification sensing |
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