Device suitable for pipeline state monitoring

Abstract

The embodiment of the invention relates to the technical field of pipeline vibration testing, in particular to a device suitable for pipeline state monitoring, and the device comprises a clamping assembly which is arranged to clamp a pipeline and reduce the vibration of the pipeline; the piezoelectric module is arranged on the clamping assembly and outputs an electric signal; the friction nanometer power generation module is arranged on the clamping assembly and outputs an electric signal; and the state of the pipeline is monitored by monitoring an electric signal output by the piezoelectric module and an electric signal output by the friction nanometer power generation module. According to the device provided by the embodiment of the invention, the compactness of the structure of the pipeline monitoring device is improved, the influence on the structure and working state of the pipeline can be avoided in the process of installing the device to the pipeline, the application scene is flexible, and the device is suitable for pipelines with long spans, limited installation spaces and the like; the pipeline state monitoring accuracy is improved, so that the reliability of a pipeline system is improved, an external power supply is not needed to supply power to the pipeline monitoring device, and the operation and maintenance cost of the pipeline monitoring device is reduced.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of pipeline vibration testing, and in particular to a device suitable for pipeline status monitoring. Background Art

[0002] The statements herein merely provide background information related to the present application and do not necessarily constitute prior art.

[0003] Piping systems are widely used in many fields, such as aviation, petrochemicals, metallurgy and mining, rail transportation, and intelligent buildings.

[0004] In the aviation field, management systems are crucial components of aircraft engines, and their operational status is crucial to their safety and reliability. Under complex operating conditions of high pressure and strong vibration, piping systems are prone to failures such as loose clamps, cracked pipes, loose joints, and oil leaks. These failures not only affect piping system performance but can also lead to serious safety incidents. Therefore, monitoring the piping system's status is crucial. Summary of the Invention

[0005] A brief overview of the present application is provided below to provide a basic understanding of certain aspects of the present application. It should be understood that this overview is not an exhaustive overview of the present application. It is not intended to identify key or important portions of the present application, nor is it intended to limit the scope of the present application. Its purpose is simply to present certain concepts in a simplified form as a prelude to the more detailed description that will be discussed later.

[0006] An embodiment of the present application provides a device suitable for pipeline status monitoring, which includes: a clamping assembly, which is configured to clamp the pipeline to be monitored; a piezoelectric module, which is arranged in the clamping assembly and outputs an electrical signal; a friction nano-power generation module, which is arranged in the clamping assembly and outputs an electrical signal; wherein the status of the pipeline is monitored by monitoring the electrical signal output by the piezoelectric module and the electrical signal output by the friction nano-power generation module, and the clamping assembly is configured to reduce the vibration of the pipeline to be monitored.

[0007] The pipeline monitoring device provided in the embodiment of the present application respectively arranges the piezoelectric module and the friction nano module in the clamping component, which is beneficial to improving the compactness of the structure of the pipeline monitoring device and facilitating installation. During the installation of the device in the pipeline, it can avoid affecting the original structure and working state of the pipeline. The application scenarios are relatively flexible and can be applied to pipeline systems with long spans and limited installation space, such as energy transmission pipeline systems in the fields of aviation, petrochemicals, metallurgy and mining, rail transportation, and intelligent buildings. At the same time, the clamping component is arranged to reduce the vibration of the pipeline to be monitored, which is beneficial to improving the accuracy of pipeline status monitoring, thereby improving the reliability of the pipeline system. The piezoelectric module and the friction nano power generation module are used to output electrical signals, so that the mechanical energy of the vibration of the pipeline to be monitored can be converted into electrical energy, the status of the pipeline can be monitored in real time, and the pipeline monitoring device can be self-powered, so that it does not need to be powered by an external power supply, which is beneficial to reducing the cost of operation and maintenance of the pipeline monitoring device.

[0008] These and other advantages of the present application will become more apparent through the following detailed description of the preferred embodiments of the present application in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] To further illustrate the above and other advantages and features of the present application, the following detailed description of specific embodiments of the present application is provided in conjunction with the accompanying drawings. The accompanying drawings, together with the detailed description below, are incorporated into and form a part of this specification. Elements with the same function and structure are denoted by the same reference numerals. It should be understood that these drawings depict only typical examples of the present application and should not be construed as limiting the scope of the present application.

[0010] Figure 1 1 is a schematic structural diagram of a device suitable for pipeline status monitoring according to an embodiment of the present application;

[0011] Figure 2 yes Figure 1 The exploded structure diagram of the device suitable for pipeline status monitoring is shown;

[0012] Figure 3 is a schematic structural diagram of a liner according to an embodiment of the present application;

[0013] Figure 4 yes Figure 3 a right side view of the pad shown;

[0014] Figure 5 yes Figure 3 An enlarged schematic diagram of a portion B of the pad shown;

[0015] Figure 6 is a schematic structural diagram of a tribo-nanoelectric power generation module according to an embodiment of the present application;

[0016] Figure 7 yes Figure 6 An enlarged schematic diagram of part A of the tribo-nano power generation module is shown.

[0017] It should be noted that the drawings are not necessarily drawn to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

[0018] Description of reference numerals:

[0019] 10. Clamping assembly; 11. Clamping member; 110. Through hole; 111. Clamping portion; 112. Fixing portion; 12. Pad; 121. First groove; 122. Second groove;

[0020] 20. Piezoelectric module;

[0021] 30. Triboelectric nano-power generation module; 31. First electrode layer; 32. Second electrode layer; 33. Triboelectric layer; 34. Insulating layer. DETAILED DESCRIPTION

[0022] Exemplary embodiments of the present application will be described below with reference to the accompanying drawings. For the sake of clarity and conciseness, not all features of actual implementations are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual implementation in order to achieve the developer's specific goals, such as meeting those constraints related to the system and business, and these constraints may vary depending on the implementation. In addition, it should be understood that although the development work may be very complex and time-consuming, it is a routine task for those skilled in the art who benefit from the content of this application.

[0023] It is also necessary to explain here that, in order to avoid obscuring the present application due to unnecessary details, the accompanying drawings only show the device structure and / or processing steps that are closely related to the solution according to the present application, while other details that are not closely related to the present application are omitted.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this application should have the common meanings understood by persons having ordinary skills in the field to which this application belongs.

[0025] In the description of the embodiments of the present application, “multiple” means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0026] Current pipeline condition monitoring methods include strain measurement using resistance strain gauges, vibration monitoring using accelerometers, fiber optic measurement using fiber Bragg grating (FBG) sensors, and ultrasonic monitoring. Each of these monitoring methods offers advantages in specific applications, but they also suffer from numerous shortcomings. For example, strain measurement methods based on resistance strain gauges suffer from poor environmental adaptability and complex installation. While fiber optic measurement methods based on fiber Bragg grating sensors offer high sensitivity, they are limited by signal transmission distance and integration challenges, limiting their application scenarios. Ultrasonic monitoring methods also struggle to achieve real-time monitoring. Furthermore, the equipment involved in current monitoring methods typically requires an external power supply, resulting in increased complexity and maintenance costs, making it difficult to meet the demands of distributed, real-time dynamic monitoring of complex pipeline systems.

[0027] In order to solve the above technical problems, the embodiments of the present application provide a device suitable for monitoring pipeline status. Figure 1 is a schematic structural diagram of a device suitable for pipeline status monitoring according to an embodiment of the present application. Figure 2 yes Figure 1 The exploded structure diagram of the device suitable for pipeline status monitoring is shown in FIG. Figure 1 and Figure 2 As shown, the device suitable for pipeline status monitoring (hereinafter referred to as the pipeline monitoring device) includes: a clamping assembly 10, a piezoelectric module 20 (Piezoelectric Energy Harvester, PEH) and a triboelectric nanogenerator module 30 (Triboelectric Nanogenerator, TENG). The clamping assembly 10 is configured to clamp the pipeline to be monitored; the piezoelectric module 20 is disposed on the clamping assembly 10 and outputs an electrical signal; the triboelectric nanogenerator module 30 is disposed on the clamping assembly 10 and outputs an electrical signal; wherein the pipeline status is monitored by monitoring the electrical signals output by the piezoelectric module 20 and the triboelectric nanogenerator module 30, and the clamping assembly 10 is configured to reduce vibration of the pipeline to be monitored.

[0028] The pipeline monitoring device provided in the embodiment of the present application has the piezoelectric module 20 and the friction nano module respectively arranged in the clamping assembly 10, which is beneficial to improving the compactness of the structure of the pipeline monitoring device and facilitating installation. In the process of installing it to the pipeline, it can avoid affecting the original structure and working state of the pipeline. The application scenarios are relatively flexible and can be applied to pipeline systems with long spans and limited installation space, such as energy transmission pipeline systems in the fields of aviation, petrochemicals, metallurgy and mining, rail transportation, and intelligent buildings. At the same time, the clamping assembly 10 is configured to reduce the vibration of the pipeline to be monitored, which is beneficial to improving the accuracy of pipeline status monitoring, thereby improving the reliability of the pipeline system. The piezoelectric module 20 and the friction nano power generation module 30 are used to output electrical signals, which can convert the mechanical energy of the vibration of the pipeline to be monitored into electrical energy, monitor the status of the pipeline in real time, and realize self-powering of the pipeline monitoring device, thereby eliminating the need for an external power supply to power it, which is beneficial to reducing the cost of operation and maintenance of the pipeline monitoring device.

[0029] In some embodiments, the electrical signal output by the piezoelectric module 20 and the electrical signal output by the triboelectric nano-power generation module 30 may include respective corresponding voltage signals and / or current signals.

[0030] In some embodiments, the clamping assembly 10 includes a clamping member 11 and a pad 12. The pad 12 is arranged in the clamping member 11. The clamping member 11 is configured to clamp the pipeline to be monitored. The piezoelectric module 20 and the friction nano power generation module 30 are respectively arranged in the pad 12. The pad 12 is configured to reduce the vibration of the pipeline to be monitored.

[0031] The embodiment of the present application configures the clamping assembly 10 to include a clamping member 11 and a gasket 12. The clamping member 11 is used to clamp the pipeline to be monitored, which helps to ensure the stability of the installation. The gasket 12 is used to reduce the vibration of the pipeline to be monitored, which helps to ensure the vibration reduction effect on the pipeline to be monitored.

[0032] In some embodiments, the clamping member 11 may include a clamping portion 111 and a fixing portion 112. The clamping portion 111 is a two semicircular structure, and the fixing portion 112 is formed at one end of the two clamping portions 111. The clamping portion 111 is configured to clamp the pipeline to be monitored, and the fixing portion 112 forms a through hole 110. The through hole 110 is used to cooperate with a bolt to fasten the clamping portion 111 to the pipeline to be monitored when the clamping portion 111 clamps the pipeline to be monitored.

[0033] In some embodiments, the liner 12 can be obtained by 3D printing or other processing methods.

[0034] In some embodiments, Figure 3 is a schematic structural diagram of a pad according to an embodiment of the present application, Figure 4 yes Figure 3 The right side view of the pad is shown as Figures 1 to 4 As shown, the gasket 12 is configured to form a plurality of first grooves 121 extending in a first direction and second grooves 122 extending in a second direction. The first direction and the second direction are opposite, and the first grooves 121 and the second grooves 122 are adjacent to each other.

[0035] The embodiment of the present application configures the gasket 12 to have a structure with grooves extending in the first direction and the second direction respectively. Compared with the traditional annular gasket 12, it can absorb vibration energy through elastic deformation when the pipeline to be monitored vibrates, thereby achieving the purpose of vibration reduction and further improving the vibration reduction effect of the gasket 12.

[0036] In some embodiments, as Figure 3 As shown in FIG, if the first direction is the direction from the outer surface of the liner 12 to the inner surface thereof, then the second direction is the direction from the inner surface of the liner 12 to the outer surface thereof. In such an embodiment, the opening of the first groove 121 extending in the first direction faces the inner surface of the liner 12; and the opening of the second groove 122 extending in the second direction faces away from the inner surface of the liner 12.

[0037] In some embodiments, the material of the pad 12 , the number of the first grooves 121 and the second grooves 122 , and the thickness of the pad 12 are determined according to the vibration reduction effect to be achieved and the input vibration energy.

[0038] The embodiments of the present application determine the material of the pad 12, the number of the first groove 121 and the second groove 122, and the thickness of the pad 12 according to the vibration reduction effect to be achieved and the input vibration energy, which is conducive to adjusting the stiffness of the pad 12, thereby effectively adjusting the overall vibration response of the clamping assembly 10, thereby achieving the purpose of vibration reduction and meeting the vibration reduction requirements in different application scenarios.

[0039] In some embodiments, the bending and deformation capabilities of the liner 12 can be modified by adjusting the number of first grooves 121 and second grooves 122. For example, increasing the number of first grooves 121 and second grooves 122 can enhance the bending and deformation capabilities of the liner 12, thereby improving the liner 12's ability to absorb vibration energy. In such an embodiment, increasing the number of first grooves 121 and second grooves 122 can provide more flexible support points, thereby enhancing the deformation capabilities of the corrugated structure. It can also disperse local stress in the liner 12, avoiding excessive stress concentration, and providing a more uniform vibration damping response when the pipeline to be monitored vibrates.

[0040] In some embodiments, the stiffness and deformation capacity of the liner 12 can be varied by adjusting the thickness of the liner 12. In such embodiments, a thinner liner 12 has lower stiffness, is more likely to deform, and absorbs more vibration energy, while a thicker liner 12 has higher stiffness, is less likely to deform, and absorbs less vibration energy.

[0041] In some embodiments, the material of the pad 12, the number of the first grooves 121 and the second grooves 122, and the thickness of the pad 12 are determined based on the vibration reduction effect to be achieved, the input vibration energy, and the limited support length of the pad 12. This is conducive to flexibly adjusting the vibration reduction effect of the pad 12 to meet the vibration reduction requirements in different application scenarios.

[0042] In some embodiments, the material of the pad 12, the number of the first grooves 121 and the second grooves 122, and the thickness of the pad 12 are determined based on the vibration reduction effect to be achieved, the input vibration energy, the limited support length of the pad 12, and the vibration displacement of the pad 12, which is conducive to flexibly adjusting the vibration reduction effect of the pad 12 to meet the vibration reduction requirements in different application scenarios.

[0043] In some embodiments, the stiffness of the liner 12 can be determined by the material properties and the geometric shape of the liner 12. For example, the liner 12 formed with the first groove 121 and the second groove 122 can be equivalent to a thin plate with uniform material and standard geometric shape. Under the action of pipeline vibration, it will bend and deform. The overall stiffness of the liner 12 satisfies the following relationship (1):

[0044] K total =K base +K groove (1).

[0045] Among them, K total Represents the overall stiffness of the pad 12; K base Indicates the reference stiffness of the pad 12; K groove represents the additional stiffness caused by the first groove 121 and the second groove 122.

[0046] In some embodiments, the reference stiffness satisfies the following relationship (2):

[0047]

[0048] Among them, K base represents the reference stiffness of the pad 12; E represents the elastic modulus of the material of the pad 12; h represents the thickness of the pad 12; v represents the Poisson's ratio of the material of the pad 12; L represents the effective support length of the pad 12, and the effective support length of the pad 12 is the total length of the support area of the pad 12.

[0049] In some embodiments, the additional stiffness caused by the first groove 121 and the second groove 122 satisfies the following relationship (3):

[0050]

[0051] Among them, K groove represents the additional stiffness caused by the first groove 121 and the second groove 122; n represents the number of the first groove 121 and the second groove 122; t represents the thickness of each groove; L represents the effective support length of the liner 12; f(E,v) represents the correction coefficient considering the elastic modulus and Poisson's ratio of the material of the liner 12, f(E,v) = E·(1-v 2 ), which is used to reflect the resistance of the pad 12 to deformation.

[0052] In some embodiments, the vibration reduction effect of the liner 12 is related to its ability to absorb vibration energy. The vibration energy absorbed by the liner 12 satisfies the following relationship (4):

[0053]

[0054] Among them, W abs represents the vibration energy absorbed by the pad 12; δ represents the loss factor of the pad 12, which is related to the damping characteristics of the material of the pad 12; K total represents the overall stiffness of the pad 12; Δx represents the vibration displacement of the pad 12.

[0055] In some embodiments, the vibration reduction effect to be achieved, the input vibration energy, the limited support length of the pad 12, the vibration displacement of the pad 12, the material of the pad 12, the number of the first groove 121 and the second groove 122, and the thickness of the pad 12 meet the following relationship (5):

[0056]

[0057] Among them, η total represents the vibration reduction effect to be achieved; δ represents the loss factor of the liner 12; E represents the elastic modulus of the material of the liner 12; h represents the thickness of the liner 12; v represents the Poisson's ratio of the material of the liner 12; L represents the effective support length of the liner 12; n represents the number of the first groove 121 and the second groove 122; t represents the thickness of each groove; Δx represents the vibration displacement of the liner 12; W input Represents the input vibration energy.

[0058] Through the above-mentioned relationship (5), the embodiment of the present application can reasonably select the material of the pad 12 according to the vibration reduction effect to be achieved, reasonably determine the number of the first grooves 121 and the second grooves 122 on the pad 12, and the thickness of the pad 12, to ensure that the pad 12 can meet the usage requirements.

[0059] In some embodiments, the number and thickness of the first grooves 121 and the second grooves 122 of the liner 12 are determined according to the resonance frequency of the liner 12 , which is helpful in meeting the vibration reduction requirements in different application scenarios.

[0060] In some embodiments, the vibration reduction effect of the pad 12 is also related to its frequency response characteristics. Considering the stiffness change and vibration absorption effect of the pad 12 at different frequencies, its vibration reduction effect can be determined by the resonant frequency of the pad 12. The resonant frequency of the pad 12 satisfies the following relationship (6):

[0061]

[0062] Wherein, f0 represents the resonant frequency of the pad 12; K total represents the overall stiffness of the pad 12; and m represents the mass of the pad 12.

[0063] In some embodiments, the pad 12 is determined to be vibrating at a high frequency, and the number of the first grooves 121 and the second grooves 122 of the pad 12 is increased, and the thickness of the pad 12 is increased, thereby facilitating the enhancement of the pad 12's ability to absorb vibration.

[0064] In some embodiments, the pad 12 is determined to be a low-frequency vibrator, and the number of the first grooves 121 and the second grooves 122 of the pad 12 is reduced, and the thickness of the pad 12 is reduced, thereby facilitating optimization of the vibration reduction effect of the pad 12 .

[0065] In some embodiments, Figure 6 is a schematic structural diagram of a friction nano-power generation module according to an embodiment of the present application. Figure 7 yes Figure 6 The enlarged schematic diagram of the part A of the triboelectric nano-power generation module is shown as Figure 1 、 Figure 6 as well as Figure 7 As shown, the friction nano power generation module 30 includes a first electrode layer 31, a second electrode layer 32, a friction layer 33 and an insulating layer 34. The first electrode layer 31 is arranged on the inner surface of the pad 12; the insulating layer 34 is arranged on the inner surface of the pad 12; the second electrode layer 32 is arranged on the outer surface of the insulating layer 34; and the friction layer 33 is arranged on the outer surface of the insulating layer 34.

[0066] The embodiment of the present application sets the friction nano-power generation module 30 to a structure including a first electrode layer 31, a second electrode layer 32, a friction layer 33 and an insulating layer 34. When the pipeline vibrates, it can output an AC signal generated by friction, thereby realizing the monitoring of the pipeline status.

[0067] In some embodiments, the first electrode layer 31 and the second electrode layer 32 may be thin films made of conductive materials, such as copper foil.

[0068] In some embodiments, the first electrode layer 31 may be disposed on the inner surface of the liner 12 by pasting, and the second electrode layer 32 may be disposed on the outer surface of the liner 12 by pasting.

[0069] In some embodiments, the friction layer 33 may be made of dielectric materials such as polyimide (PI), polytetrafluoroethylene (PTFE), and polyethylene terephthalate (PET).

[0070] In some embodiments, a charge transfer interface may be formed through the cooperation between the second electrode layer 32 and the friction layer 33 .

[0071] In some embodiments, the insulating layer 34 may be made of polylactic acid (PLA) and may be processed into a ring-shaped structure by 3D printing or other methods.

[0072] In some embodiments, the gap between the friction layer 33 and the insulating layer 34 can be set to be adjustable, so that the output performance of the triboelectric nano-power generation module 30 can be changed by adjusting the gap between the friction layer 33 and the insulating layer 34 .

[0073] In some embodiments, the power generation mode of the tribo-nano power generation module 30 may be a vertical contact-separation mode.

[0074] In some embodiments, the friction nano power generation module 30 includes a first electrode layer 31, a second electrode layer 32, a friction layer 33 and an insulating layer 34. The first electrode layer 31 is arranged in the first groove 121 of the pad 12; the insulating layer 34 is arranged in the first groove 121 of the pad 12; the second electrode layer 32 is arranged on the outer surface of the insulating layer 34; and the friction layer 33 is arranged on the outer surface of the insulating layer 34.

[0075] In some embodiments, the piezoelectric module 20 includes a piezoelectric layer disposed on an outer surface of the pad 12 .

[0076] In the embodiment of the present application, a piezoelectric layer is arranged on the outer surface of the liner 12. When the pipeline to be monitored causes the liner 12 to undergo alternating bending and deformation due to vibration, the piezoelectric layer arranged on the outer surface of the liner 12 can be vibrated and deformed. The piezoelectric module 20 generates an alternating current signal due to the piezoelectric effect, thereby achieving the purpose of dynamic monitoring of the pipeline status and self-power supply.

[0077] In some embodiments, the piezoelectric layer of the piezoelectric module 20 may be formed of a piezoelectric film, and the material of the piezoelectric film may be polyvinylidene fluoride (PVDF), macrofiber composite (MFC), etc.

[0078] In some embodiments, the piezoelectric layer can be disposed on the outer surface of the gasket 12 by gluing.

[0079] In some embodiments, Figure 5 yes Figure 3 The enlarged schematic diagram of the part B of the pad is shown as Figure 3 and Figure 5 As shown, the piezoelectric module 20 includes a piezoelectric layer, which is disposed in the second groove 122 of the pad 12 .

[0080] It can be understood that in an embodiment where the liner 12 is configured to have a first groove 121 and a second groove 122 , the outer surface of the liner 12 may be the second groove 122 of the liner 12 .

[0081] For example, the operation of the pipeline monitoring device of the embodiment of the present application can be tested by building a vibration test bench. The vibration test bench may include a signal generator, a power amplifier, an exciter, an oscilloscope, an electrometer, and data acquisition and analysis, etc. The following describes the process of monitoring the pipeline using the pipeline monitoring device of the present application in conjunction with specific embodiments.

[0082] Example 1

[0083] Step 1: A signal generator is used to generate a vibration spectrum signal with a predetermined frequency and amplitude.

[0084] Step 2: Amplify the vibration spectrum signal by adjusting the gain of the power amplifier.

[0085] Step 3: The vibrator provides excitation to the pipeline to be monitored according to the predetermined vibration spectrum signal.

[0086] Step 4: Collect the electrical signal generated by the pipeline monitoring device of the embodiment of the present application through an oscilloscope and an electrometer.

[0087] Step 5: Collect the electrical signal generated by the pipeline monitoring device through the data acquisition module.

[0088] Step 6: Process and analyze the electrical signals collected in steps 4 and 5 using data analysis software.

[0089] In some embodiments, during the output performance test of the power generation module, the frequency of the vibration spectrum signal can be adjusted by a signal generator, and an exciter can be used to provide excitation inputs of different frequencies to the pipeline monitoring device. Then, an oscilloscope and an electrometer are used to collect electrical signals such as the open-circuit voltage and short-circuit current generated by the power generation module of the pipeline monitoring device to compare and analyze the output performance of the pipeline monitoring device under different excitation frequencies.

[0090] In some embodiments, the vibration spectrum signal gain can be adjusted through a power amplifier, and an exciter can be used to provide excitation inputs with different gains to the pipeline monitoring device. The electrical signals such as the open-circuit voltage and short-circuit current generated by the power generation module of the pipeline monitoring device can be collected through an oscilloscope and an electrometer to compare and analyze the output performance of the pipeline monitoring device under different excitation amplitudes.

[0091] In some embodiments, piezoelectric films of different materials and types can be selected to make power generation modules for multiple pipeline monitoring devices. The electrical signals such as open-circuit voltage and short-circuit current generated by the power generation modules of different pipeline monitoring devices can be collected by an oscilloscope and an electrometer to compare and analyze the output performance of the power generation modules of pipeline monitoring devices of different materials and types.

[0092] In some embodiments, during the output performance test of the friction nano-power generation module 30, the frequency of the vibration spectrum signal can be adjusted by a signal generator, and an exciter can be used to provide excitation inputs of different frequencies to the pipeline monitoring device. Then, an oscilloscope and an electrometer are used to collect electrical signals such as the open-circuit voltage and short-circuit current generated by the friction nano-power generation module 30 of the pipeline monitoring device to compare and analyze the output performance of the pipeline monitoring device under different excitation frequencies.

[0093] In some embodiments, the vibration spectrum signal gain is adjusted through a power amplifier, and an exciter is used to provide excitation inputs of different gains to the pipeline monitoring device. Then, an oscilloscope and an electrometer are used to collect electrical signals such as the open-circuit voltage and short-circuit current generated by the friction nano-power generation module 30 of the pipeline monitoring device to compare and analyze the output performance of the pipeline monitoring device under different excitation amplitudes.

[0094] In some embodiments, different dielectric materials can be selected to make the friction nano-power generation modules 30 of multiple pipeline monitoring devices. The electrical signals such as the open-circuit voltage and short-circuit current generated by the friction nano-power generation modules 30 of different pipeline monitoring devices can be collected by an oscilloscope and an electrometer to compare and analyze the output performance of the friction nano-power generation modules 30 of the pipeline monitoring devices under different dielectric materials.

[0095] In some embodiments, dielectric materials of different thicknesses can be selected to make friction nano-power generation modules 30 for multiple pipeline monitoring devices. The electrical signals such as open-circuit voltage and short-circuit current generated by the friction nano-power generation modules 30 of different pipeline monitoring devices can be collected by an oscilloscope and an electrometer to compare and analyze the output performance of the friction nano-power generation modules 30 of pipeline monitoring devices with different thicknesses.

[0096] In some embodiments, the gap between the friction layer 33 and the second electrode layer 32 in the friction nano-power generation module 30 can be adjusted, and the friction nano-power generation modules 30 of multiple pipeline monitoring devices can be produced by 3D printing. The electrical signals such as the open-circuit voltage and short-circuit current generated by the friction nano-power generation modules 30 of different pipeline monitoring devices can be collected by an oscilloscope and an electrometer to compare and analyze the output performance of the friction nano-power generation modules 30 of the pipeline monitoring devices under different gaps.

[0097] In some embodiments, the optimal output performance of the friction nano-power generation module 30 of the pipeline monitoring device can be determined by optimizing the material and structural parameters of the friction nano-power generation module 30 .

[0098] In some embodiments, the pipeline status characteristics analysis can be performed by analyzing the electrical signals output by the friction nano-power generation module 30 and the power generation module of the pipeline monitoring device.

[0099] Example 2

[0100] In order to further determine the reliability of the pipeline monitoring device of the present application, a durability test may be carried out on the friction nano-power generation module 30 of the pipeline monitoring device, which specifically includes the following steps.

[0101] S1: Use a signal generator to adjust the frequency of the vibration spectrum signal to 315 Hz to simulate the actual operating conditions of the pipeline to be monitored.

[0102] S2: The vibrator provides excitation to the pipeline monitoring device according to the vibration spectrum signal given by the signal generator. The device continues to operate for half an hour under the excitation, and the output voltage of the friction nano-power generation module 30 in the pipeline monitoring device is recorded.

[0103] S3: Turn off the test bench and cool the exciter.

[0104] S4: Repeat steps S2 and S3 10 times.

[0105] S5: Comparative analysis of the surface morphology of the friction layer 33 of the triboelectric nano-power generation module 30 before and after the test.

[0106] Example 3

[0107] To further determine the reliability of the pipeline monitoring device of the present application, a vibration test may be performed on the pipeline monitoring device of the embodiment of the present application and a traditional pipeline monitoring device and compared, which specifically includes the following steps.

[0108] S10: Install a traditional pipeline monitoring device on the pipeline to be monitored and arrange an acceleration sensor. Then, perform a frequency sweep test near the first-order natural frequency of the pipeline system to obtain the first vibration response of the pipeline.

[0109] S20: Then, the pipeline monitoring device of the embodiment of the present application is installed on the pipeline to be monitored, and an acceleration sensor is arranged at the same position to provide the pipeline with excitation of the same frequency and amplitude, and a sweep frequency test is carried out near the first-order natural frequency of the pipeline system to obtain the second vibration response of the pipeline.

[0110] S30: Compare and analyze the first vibration response and the second vibration response to determine the reliability of the pipeline monitoring device according to the embodiment of the present application.

[0111] Regarding the embodiments of the present application, it should also be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other to obtain new embodiments.

[0112] The above description is only a specific implementation method of the present application, but the protection scope of the present application is not limited thereto. The protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A device suitable for pipeline status monitoring, characterized in that: It includes: A clamping assembly, the clamping assembly being configured to clamp a pipeline to be monitored; a piezoelectric module, the piezoelectric module being disposed in the clamping assembly and outputting an electrical signal; a triboelectric nano-power generation module, which is disposed on the clamping assembly and outputs an electrical signal; The state of the pipeline is monitored by monitoring the electrical signal output by the piezoelectric module and the electrical signal output by the friction nano power generation module, and The clamping assembly is configured to reduce vibrations of the pipeline to be monitored.

2. The device according to claim 1, characterized in that The clamping assembly includes a clamping member and a liner, wherein the liner is disposed in the clamping member. The clamping member is configured to clamp the pipeline to be monitored, The piezoelectric module and the friction nano-power generation module are respectively arranged on the pads, The liner is configured to reduce vibration of the pipeline to be monitored.

3. The device according to claim 2, characterized in that The pad is configured to form a plurality of first grooves extending in a first direction and a second groove extending in a second direction, respectively. The first direction and the second direction are opposite to each other, and the first grooves and the second grooves are adjacent to each other.

4. The device according to claim 3, characterized in that The material of the gasket, the number of the first grooves and the second grooves, and the thickness of the gasket are determined according to the vibration reduction effect to be achieved and the input vibration energy.

5. The device according to claim 3, characterized in that The material of the liner, the number of the first grooves and the second grooves, and the thickness of the liner are determined according to the vibration reduction effect to be achieved, the input vibration energy, and the limited support length of the liner.

6. The device according to claim 3, characterized in that The material of the pad, the number of the first grooves and the second grooves, and the thickness of the pad are determined according to the vibration reduction effect to be achieved, the input vibration energy, the limited support length of the pad, and the vibration displacement of the pad.

7. The device according to claim 6, characterized in that The vibration reduction effect to be achieved, the input vibration energy, the limited support length of the pad, the vibration displacement of the pad, the material of the pad, the number of the first groove and the second groove, and the thickness of the pad meet the following relationship: Among them, η total represents the vibration reduction effect to be achieved; δ represents the loss factor of the liner; E represents the elastic modulus of the material of the liner; h represents the thickness of the liner; v represents the Poisson's ratio of the material of the liner; L represents the effective support length of the liner; n represents the number of the first groove and the second groove; t represents the thickness of each groove; Δx represents the vibration displacement of the liner; W input Represents the input vibration energy.

8. The device according to claim 3, characterized in that The number and thickness of the first grooves and the second grooves of the gasket are determined according to the resonance frequency of the gasket.

9. The device according to claim 8, characterized in that Determine that the pad is vibrating at a high frequency, increase the number of the first grooves and the second grooves of the pad, and increase the thickness of the pad.

10. The device according to claim 8, characterized in that Determine that the pad is vibrating at a low frequency, reduce the number of the first grooves and the second grooves of the pad, and reduce the thickness of the pad.

11. The device according to claim 2, characterized in that The friction nano power generation module includes a first electrode layer, a second electrode layer, a friction layer and an insulating layer. The first electrode layer is provided on the inner surface of the pad; The insulating layer is provided on the inner surface of the liner; The second electrode layer is arranged on the outer surface of the insulating layer; The friction layer is arranged on the outer surface of the insulating layer.

12. The device according to any one of claims 3 to 8, characterized in that The friction nano power generation module includes a first electrode layer, a second electrode layer, a friction layer and an insulating layer. The first electrode layer is disposed in the first groove of the pad; The insulating layer is disposed in the first groove of the liner; The second electrode layer is arranged on the outer surface of the insulating layer; The friction layer is arranged on the outer surface of the insulating layer.

13. The device according to claim 2, characterized in that The piezoelectric module includes a piezoelectric layer disposed on an outer surface of the pad.

14. The device according to any one of claims 3 to 8, characterized in that The piezoelectric module includes a piezoelectric layer disposed in the second groove of the pad.

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