An insulator defect detection system power supply device

Abstract

The application relates to the field of insulator defect detection and discloses an insulator defect detection system energy supply device, which comprises a clamping mechanism used for clamping and fixing an insulator outside; an energy collection unit fixed on the clamping mechanism generates electric energy by mechanical vibration of the insulator; and an elastic vibration transmission part is arranged at a contact position of the clamping mechanism and the insulator; the elastic rubber layer realizes the double functions of clamping stability and vibration conduction, one substrate in the energy collection unit is fixed, the other substrate generates relative displacement by inertia hysteresis effect to drive the contact separation of the friction layer to generate electricity, and the motor only works for a short time during installation, and the clamping is maintained by thread self-locking after power-off, so that the problem of long-term power supply difficulty of the insulator defect detection equipment in the field and high altitude is effectively solved, self-maintenance energy supply without external power supply and battery replacement is realized, and stable and reliable energy guarantee is provided for acoustic emission online monitoring of internal defects of the insulator.

Description

Technical Field

[0001] This invention relates to the field of insulator defect detection, and in particular to a power supply device for an insulator defect detection system. Background Technology

[0002] In high-voltage transmission lines, insulators operate in high-altitude outdoor environments for extended periods, making them prone to latent defects such as microcracks and material degradation. If these defects are not detected promptly, they can escalate into serious accidents. Acoustic emission technology, capable of passively picking up high-frequency stress waves released from defect propagation, is considered an effective means of online insulator monitoring. However, its long-term operation relies on a continuous power supply, which is hampered by difficulties in battery replacement in outdoor environments and severe weather-related limitations to solar power, hindering the current system's ability to achieve maintenance-free, long-term operation. In recent years, triboelectric nanogenerators have emerged as a new technological path for self-powering low-power sensors, converting weak environmental mechanical energy into electrical energy. However, the mechanical vibrations of insulators are extremely weak. Conventional rigid clamping methods apply the device's own weight rigidly to the insulator surface, suppressing or even completely damping these minute vibrations, resulting in insufficient driving force. Non-contact installation leads to discontinuous vibration transmission paths and a sharp decrease in acquisition efficiency. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is that rigid clamping will suppress the weak vibration of the insulator, and non-contact method has low vibration transmission efficiency, making it difficult to effectively obtain energy from the vibration of the insulator during service to achieve self-sustaining power supply.

[0004] The above-mentioned technical problems are solved by the following technical solution: This invention proposes a power supply device for an insulator defect detection system, which includes, Clamping mechanism, used to clamp and fix to the outside of the insulator; An energy harvesting unit, fixed to the clamping mechanism, generates electrical energy by utilizing the mechanical vibration of the insulator; The contact portion between the clamping mechanism and the insulator is provided with an elastic vibration transmission element. The elastic vibration transmission element is located between the contact surfaces of the clamping mechanism and the insulator. It is used to undergo elastic deformation and generate a clamping force in the clamping state, thereby pressing the clamping mechanism against the surface of the insulator and transmitting the mechanical vibration of the insulator to the energy harvesting unit. Specifically, the energy harvesting unit is fixedly installed on the outside of the insulator by the clamping mechanism, and the elastic vibration transmission element is set between the contact surface of the clamping mechanism and the insulator. Thus, when the clamping mechanism is in the clamping state, the elastic vibration transmission element undergoes elastic deformation, generating a clamping force to press the clamping mechanism against the insulator surface, ensuring that the clamping posture remains constant during long-term service and preventing the device from slipping along the insulator surface or moving axially due to external forces such as wind vibration or conductor galloping. Furthermore, the elastic vibration transmission element has a suitable elastic modulus and low damping characteristics, capable of dissipating insulator vibrations caused by wind or power frequency electromagnetic fields. The micron-level reciprocating mechanical displacement induced by the force is transmitted from the surface of the insulator to the energy harvesting unit on the clamping mechanism with minimal energy attenuation, enabling the energy harvesting unit to reciprocate synchronously with the micro-vibrations of the insulator. Through the above design, the elastic vibration transmission component achieves stable clamping while also taking into account the function of vibration transmission. This effectively solves the technical problem that the micro-vibrations of the insulator are suppressed under the gravity of the clamping mechanism itself and cannot be effectively transmitted to the energy harvesting unit. This ensures that the energy harvesting unit can continuously and efficiently obtain energy from the mechanical vibration of the insulator, providing a self-sustaining power supply for subsequent electrical loads.

[0005] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention: the elastic vibration transmission element is an elastic rubber layer; Specifically, the elastic vibration transmission element uses an elastic rubber layer, which has good elastic deformation capability and suitable damping characteristics. In the clamping state, the elastic rubber layer uniformly adheres to and presses against the outer wall of the insulator through its own elastic deformation, so that the gripper and the insulator form a stable fit with a large contact area and a high coefficient of friction, effectively preventing the device from slipping or moving. At the same time, the elastic rubber layer can transmit the small vibrations of the insulator to the energy harvesting unit in a low-attenuation manner, and avoid the rigid gripper directly contacting the ceramic surface of the insulator to avoid indentation or damage, ensuring that the device can safely and efficiently complete vibration energy harvesting during long-term service.

[0006] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention: the energy acquisition unit includes a first friction layer, a second friction layer, a first electrode, and a second electrode; The first friction layer and the second friction layer are disposed opposite to each other, and their triboelectric sequences are different; the first electrode is disposed on the side surface of the first friction layer away from the second friction layer, and the second electrode is disposed on the side surface of the second friction layer away from the first friction layer. Specifically, when the first substrate is fixed to the clamping mechanism, it moves synchronously with the vibration of the insulator; the second substrate is in a floating state and is not directly fixed to the clamping mechanism; due to the response delay of the inertial hysteresis effect of the second substrate, the movement of the second substrate is phase-delayed relative to the first substrate, and a relative displacement is generated between the two, thereby driving the first friction layer and the second friction layer to periodically contact and separate; when the two friction layers contact, due to the different electron affinities of the two materials, electrons transfer from the positively charged material to the negatively charged material, forming equal amounts of oppositely charged frictional charges at the contact interface; when the two layers separate, the frictional charges cannot be neutralized, and a potential difference is established between the corresponding first electrode and the second electrode, driving electrons to flow directionally through the external circuit to form a pulse current; the continuous vibration of the insulator makes this contact and separation process repeat, and the energy harvesting unit outputs alternating pulse electrical energy; by adopting the above power generation structure, the energy harvesting unit can efficiently convert the weak mechanical vibration of the insulator into electrical energy, providing a self-sustaining power supply for subsequent electrical loads.

[0007] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention: the energy acquisition unit further includes a first substrate and a second substrate; The first electrode is disposed on the side surface of the first substrate facing the second friction layer, and the first friction layer is disposed on the side surface of the first electrode facing the second friction layer; The second electrode is disposed on the side surface of the second substrate facing the first friction layer, and the second friction layer is disposed on the side surface of the second electrode facing the first friction layer; The first substrate or the second substrate is fixed to the clamping mechanism; Specifically, when the mechanical vibration of the insulator is transmitted to the clamping mechanism through the elastic vibration transmission element, the base plate mounted with the clamping mechanism moves synchronously with the clamping mechanism; the other base plate lags behind due to inertia, and a relative displacement occurs between the two, thereby causing the first friction layer and the second friction layer to periodically contact and separate, generating alternating electrical energy between the first electrode and the second electrode; through the design of the above base plate structure, not only is a stable mechanical support provided for the friction layer and the electrode, but also the inertial lag coordination between the fixed installation of one base plate and the floating installation of the other base plate ensures that the vibration energy can be efficiently transferred from the insulator to the energy harvesting unit.

[0008] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention: the first friction layer is a PTFE friction layer, and the second friction layer is a nylon film; Specifically, the PTFE friction layer is strongly negatively charged, while the nylon film is strongly positively charged. They have a large potential difference in the triboelectric series. When the PTFE friction layer comes into contact with the nylon film, electrons transfer from the nylon film to the PTFE friction layer, forming equal amounts of opposite triboelectric charges at the contact interface. By selecting PTFE and nylon as paired materials, the amount of charge transfer between the two friction layers is increased, improving the output power density and energy conversion efficiency of the energy harvesting unit. This allows the energy harvesting unit to generate sufficient electrical energy to supply subsequent electrical loads even under conditions of weak insulator vibration.

[0009] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention: the clamping mechanism includes two opposing jaws and a drive assembly connected between the two jaws; Specifically, the two grippers are driven by the drive assembly to close towards each other or open away from each other, so as to install and remove the device on the insulator. This design allows the device to be quickly installed on insulators of different outer diameters without damaging the insulator, without the need for drilling or additional fixing operations on the insulator.

[0010] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention: the clamping mechanism further includes a base box, the driving component is adapted to be installed on the outside of the base box, and the base box is fixed to the hardware of the insulator; Specifically, the base box serves as a support base, providing a stable installation foundation for the drive assembly. At the same time, by fixing the base box to the insulator fittings, the entire device achieves a dual fixing effect on the insulator. It is held by the claws on the outer wall of the insulator and fixed to the fittings by the base box, thereby ensuring that the device will not shift or loosen due to wind vibration or conductor galloping during long-term service, thus improving the reliability and stability of the device operation.

[0011] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention: the driving component includes a driving component, a double-ended screw, and a limiting component; the driving component can be a motor or other power component that can drive the double-ended screw to rotate; the limiting component can be a guide rod, a guide rail, or other component that limits the sliding of the gripper; The double-ended screw is rotatably connected to the base box. The double-ended screw has two external threads with opposite directions of rotation. The two jaws are respectively threaded into the two external threads. The limiting member is fixedly connected to the base box, and the two grippers are slidably connected to the limiting member; The driving component is installed on the outside of the base box, and the output end of the driving component is connected to the double-ended screw drive to drive the double-ended screw to rotate. Specifically, when the driving component drives the double-headed screw to rotate, the two grippers cannot rotate with the double-headed screw under the constraint of the limiting component. They can only make synchronous, opposite-facing, or opposite-facing linear movements along the limiting component, thereby achieving the clamping and fixing of the insulator.

[0012] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention: the driving component is a motor; Specifically, during installation, the portable temporary power supply briefly drives the motor to rotate, and the motor output shaft drives the double-headed screw to rotate. Under the constraint of the limiting component, the two grippers close towards each other. After the grippers complete clamping, the motor power is cut off, and the motor is completely de-energized and enters a zero-power state, consuming no electrical energy. This design ensures that the motor drive only works briefly during the installation and commissioning phase, and is completely de-energized after the device enters long-term autonomous operation, achieving zero-power clamping and holding under normal conditions, effectively reducing the energy consumption of the entire power supply device.

[0013] In a preferred embodiment of the power supply device for the insulator defect detection system of the present invention, it further includes a power management module and an acoustic emission sensor. The input terminal of the power management module is electrically connected to the power output terminal of the energy harvesting unit, and is used to convert the electrical energy generated by the energy harvesting unit into DC power suitable for powering electrical loads. The acoustic emission sensor is mounted on the clamping mechanism or on the outer wall of the insulator and is electrically connected to the output terminal of the power management module to receive electrical energy and pick up the acoustic emission signal of the insulator. Specifically, the alternating pulse electrical energy output by the energy harvesting unit is rectified, regulated, and stored by the power management module, converting it into stable DC power suitable for supplying electrical loads. The acoustic emission sensor is mounted on the clamping mechanism or the outer wall of the insulator. Under the continuous power supply of the power management module, the acoustic emission sensor picks up the high-frequency stress waves released inside the insulator due to the expansion of defects such as microcrack initiation, material degradation, or intergranular cracking in real time, and converts them into electrical signals for subsequent analysis and processing. Through the above design, the electrical energy harvested by the energy harvesting unit is stably output to the acoustic emission sensor through the power management module, freeing the acoustic emission sensor from dependence on external power sources or batteries, and realizing self-sustaining operation in high-altitude outdoor environments. This enables long-term and continuous monitoring of the internal defect status of the insulator during its service life.

[0014] The beneficial effects of this invention are as follows: the elastic rubber layer achieves the dual functions of clamping stability and vibration transmission. Combined with the energy harvesting unit, in which one substrate is fixed and the other substrate uses the inertial hysteresis effect to generate relative displacement to drive the friction layer to contact and separate to generate electricity, and combined with the zero-power design that the motor only works briefly during installation and relies on the thread self-locking to maintain clamping after power failure, this invention effectively solves the problem of long-term power supply difficulties for outdoor high-altitude insulator defect detection equipment. It achieves self-sustaining power supply without external power supply or battery replacement, providing a stable and reliable energy guarantee for online acoustic emission monitoring of internal defects in insulators. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0016] Figure 1 The overall structure and insulator mounting structure of the present invention are shown in the front view.

[0017] Figure 2 A side view of the overall structure and insulator mounting structure of the present invention is shown.

[0018] Figure 3 A top view of the overall structure and insulator mounting structure of the present invention is shown.

[0019] Figure 4 A top view of the overall structure of the present invention is shown.

[0020] Figure 5 A schematic diagram of the specific structure of the energy harvesting unit of the present invention is shown. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0022] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new techniques. Furthermore, specific terms may be chosen independently, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of the invention.

[0023] Reference Figures 1-5This embodiment provides a power supply device for an insulator defect detection system, comprising: a clamping mechanism 1 for clamping and fixing to the outside of an insulator 100; and an energy harvesting unit 2 fixed to the clamping mechanism 1, which generates electrical energy by utilizing the mechanical vibration of the insulator 100. An elastic vibration transmission element 3 is provided at the contact portion between the clamping mechanism 1 and the insulator 100. The elastic vibration transmission element 3 is located between the contact surfaces of the clamping mechanism 1 and the insulator 100, and is used to elastically deform and generate a clamping force in the clamping state, pressing the clamping mechanism 1 against the surface of the insulator 100 and transmitting the mechanical vibration of the insulator 100 to the energy harvesting unit 2. The energy harvesting unit 2 is fixedly installed on the outside of the insulator 100 through the clamping mechanism 1, and the elastic vibration transmission element 3 is provided between the contact surfaces of the clamping mechanism 1 and the insulator 100. Thus, when the clamping mechanism 1 is in the clamping state, the elastic vibration transmission element 3 elastically deforms, generating a clamping force to press the clamping mechanism 1 against the surface of the insulator 100, ensuring the device... During long-term service, the clamping posture remains constant, preventing the device from slipping along the insulator surface or moving axially due to external forces such as wind vibration or conductor galloping. Furthermore, the elastic vibration transmission element 3 possesses suitable elastic modulus and low damping characteristics, enabling it to transmit the micron-level reciprocating mechanical displacement of the insulator 100 caused by wind vibration or power frequency electromagnetic force from the surface of the insulator 100 to the energy harvesting unit 2 on the clamping mechanism 1 with minimal energy attenuation. This allows the energy harvesting unit 2 to reciprocate synchronously with the micro-vibrations of the insulator 100. Through this design, the elastic vibration transmission element 3 achieves stable clamping while also fulfilling the function of vibration transmission. This effectively solves the technical problem that the micro-vibrations of the insulator 100 are suppressed under the weight of the clamping mechanism 1 and cannot be effectively transmitted to the energy harvesting unit 2. This ensures that the energy harvesting unit 2 can continuously and efficiently extract energy from the mechanical vibrations of the insulator 100, providing a self-sustaining power supply for subsequent electrical loads.

[0024] In some embodiments, such as Figure 4 The elastic vibration transmission element 3 is an elastic rubber layer, which has good elastic deformation capability and suitable damping characteristics. In the clamping state, the elastic rubber layer uniformly adheres to and presses against the outer wall of the insulator 100 through its own elastic deformation, so that the gripper 11 and the insulator 100 form a stable fit with a large contact area and a high coefficient of friction, effectively preventing the device from slipping or moving. At the same time, the elastic rubber layer can transmit the small vibrations of the insulator 100 to the energy harvesting unit 2 in a low-attenuation manner, and avoid the rigid gripper directly contacting and causing indentation or damage to the ceramic surface of the insulator 100, ensuring that the device can safely and efficiently complete the vibration energy harvesting during long-term service.

[0025] In some embodiments, such as Figure 5The energy harvesting unit 2 includes a first friction layer 21, a second friction layer 22, a first electrode 23, and a second electrode 24. The first friction layer 21 and the second friction layer 22 are arranged opposite each other, and their triboelectric sequences are different. The first electrode 23 is disposed on the surface of the first friction layer 21 away from the second friction layer 22, and the second electrode 24 is disposed on the surface of the second friction layer 22 away from the first friction layer 21. When the first substrate 25 is fixed on the clamping mechanism 1, it moves synchronously with the vibration of the insulator 100. The second substrate 26 is in a floating state and is not directly fixed to the clamping mechanism 1. Due to the response delay of the inertial hysteresis effect of the second substrate 26, the movement of the second substrate 26 relative to the first substrate 25 has a phase delay, and a relative displacement occurs between the two, thereby bringing... The first friction layer 21 and the second friction layer 22 periodically contact and separate. When the two friction layers contact each other, due to the different electron affinities of the two materials, electrons transfer from the positively charged material to the negatively charged material, forming equal amounts of opposite frictional charges at the contact interface. When the two layers separate, the frictional charges cannot be neutralized, and a potential difference is established between the corresponding first electrode 23 and second electrode 24, driving electrons to flow directionally through the external circuit to form a pulse current. The continuous vibration of the insulator 100 makes this contact and separation process repeat, and the energy harvesting unit 2 outputs alternating pulse electrical energy. By adopting the above-mentioned power generation structure, the energy harvesting unit 2 can efficiently convert the weak mechanical vibration of the insulator 100 into electrical energy, providing a self-sustaining power supply for subsequent electrical loads.

[0026] In some embodiments, such as Figure 5 The energy harvesting unit 2 also includes a first substrate 25 and a second substrate 26; a first electrode 23 is disposed on the surface of the first substrate 25 facing the second friction layer 22, and a first friction layer 21 is disposed on the surface of the first electrode 23 facing the second friction layer 22; a second electrode 24 is disposed on the surface of the second substrate 26 facing the first friction layer 21, and a second friction layer 22 is disposed on the surface of the second electrode 24 facing the first friction layer 21; the first substrate 25 or the second substrate 26 is fixed to the clamping mechanism 1; when the mechanical vibration of the insulator 100 is transmitted to the clamping mechanism 1 through the elastic vibration transmission member 3, it interacts with... The substrate mounted on the clamping mechanism 1 moves synchronously with the clamping mechanism 1; the other substrate lags behind due to inertia, resulting in relative displacement between the two, thereby causing the first friction layer 21 and the second friction layer 22 to periodically contact and separate, generating alternating electrical energy between the first electrode 23 and the second electrode 24; through the design of the above substrate structure, not only is a stable mechanical support provided for the friction layer and the electrode, but also the inertial lag between the fixed installation of one substrate and the floating installation of the other substrate ensures that the vibration energy can be efficiently transferred from the insulator 100 to the energy harvesting unit 2.

[0027] In some embodiments, such as Figure 5The first friction layer 21 is a PTFE friction layer, and the second friction layer 22 is a nylon film. The PTFE friction layer is strongly negatively charged, and the nylon film is strongly positively charged. The two have a large potential difference in the triboelectric series. When the PTFE friction layer comes into contact with the nylon film, electrons are transferred from the nylon film to the PTFE friction layer, forming equal amounts of opposite triboelectric charges at the contact interface. By selecting PTFE and nylon as paired materials, the amount of charge transfer between the two friction layers is increased, improving the output power density and energy conversion efficiency of the energy harvesting unit 2. This enables the energy harvesting unit 2 to generate sufficient electrical energy to supply subsequent electrical loads even under the condition of weak vibration of the insulator 100.

[0028] In some embodiments, such as Figures 1-3 The clamping mechanism 1 includes two opposing grippers 11 and a drive assembly 12 connected between the two grippers 11. The drive assembly 12 drives the two grippers 11 to close towards each other or open away from each other, thereby enabling the installation and removal of the device on the insulator 100. This design allows the device to be quickly installed on insulators 100 of different outer diameters without damaging the insulator 100, without the need for drilling or additional fixing operations on the insulator 100.

[0029] In some embodiments, such as Figures 1-3 The clamping mechanism 1 also includes a base box 13, and the drive assembly 12 is adapted to be installed on the outside of the base box 13. The base box 13 is fixed to the hardware of the insulator 100. The base box 13 serves as a support base, providing a stable installation foundation for the drive assembly 12. At the same time, by fixing the base box 13 to the hardware of the insulator 100, the entire device achieves a dual fixing effect on the insulator 100. It is clamped to the outer wall of the insulator 100 by the claws 11 and fixed to the hardware by the base box 13. This ensures that the device will not shift or loosen due to wind vibration or conductor galloping during long-term service, thus improving the reliability and stability of the device operation.

[0030] In some embodiments, such as Figures 1-3The drive assembly 12 includes a drive component 121, a double-ended screw 122, and a limiting component 123. The drive component 121 can be a motor or other power component that can drive the double-ended screw 122 to rotate. The limiting component 123 can be a guide rod, guide rail, or other component that limits the sliding of the grippers 11. The double-ended screw 122 is rotatably connected to the base box 13. The double-ended screw 122 has two external threads with opposite directions of rotation, and the two grippers 11 are respectively threaded into the two external threads. The limiting component 123 is fixedly connected to the base box 13. Two grippers 11 are slidably connected to the limiting member 123; the driving member 121 is installed on the outside of the base box 13, and the output end of the driving member 121 is connected to the double-ended screw 122 for driving the double-ended screw 122 to rotate; when the driving member 121 drives the double-ended screw 122 to rotate, the two grippers 11 cannot rotate with the double-ended screw 122 under the constraint of the limiting member 123, and can only make a linear movement along the limiting member 123 to synchronously close in opposite directions or open in opposite directions, thereby realizing the clamping and fixing of the insulator 100.

[0031] In some embodiments, such as Figures 1-3 The driving component 121 is a motor. During installation, the motor is briefly driven by a portable temporary power supply. The motor output shaft drives the double-headed screw 122 to rotate. Under the constraint of the limiting component 123, the two grippers 11 close towards each other. After the grippers 11 have finished clamping, the power supply to the motor is cut off, and the motor is completely de-energized and enters a zero-power consumption state, without consuming any electrical energy. This design allows the motor drive to work only briefly during the installation and commissioning phase, and to be completely de-energized after the device enters long-term autonomous operation. This achieves zero-power clamping and holding under normal conditions, effectively reducing the energy consumption of the entire power supply device.

[0032] In some embodiments, such as Figures 1-3 It also includes a power management module and an acoustic emission sensor; The input terminal of the power management module is electrically connected to the power output terminal of the energy harvesting unit 2, and is used to convert the electrical energy generated by the energy harvesting unit 2 into DC power suitable for supplying power to the electrical load; the acoustic emission sensor is mounted on the clamping mechanism 1 or on the outer wall of the insulator 100, and is electrically connected to the output terminal of the power management module, and is used to receive electrical energy and pick up the acoustic emission signal of the insulator 100; the alternating pulse electrical energy output by the energy harvesting unit 2 is rectified, regulated and stored by the power management module, and converted into stable DC power suitable for supplying power to the electrical load; the acoustic emission sensor is mounted on the clamping mechanism 1 or on the outer wall of the insulator 100. On the outer wall of the insulator 100, under the continuous power supply of the power management module, the acoustic emission sensor picks up the high-frequency stress waves released by the expansion of defects such as microcrack initiation, material deterioration or intergranular cracking inside the insulator 100 in real time, and converts them into electrical signals for subsequent analysis and processing. Through the above design, the electrical energy collected by the energy acquisition unit 2 is stably output to the acoustic emission sensor through the power management module, so that the acoustic emission sensor is free from dependence on external power supply or battery, and realizes self-sustaining operation in the field high-altitude environment, so that the internal defect status of the insulator 100 can be monitored for a long time and continuously during its service.

[0033] In summary, the device is fixed to the outside of the insulator 100 by the clamping mechanism 1. An elastic vibration transmission element 3 is provided between the clamping mechanism 1 and the insulator 100. The elastic deformation generates a clamping force to achieve stable clamping and transmits the micron-level mechanical vibration of the insulator 100 to the energy harvesting unit 2. In the energy harvesting unit 2, one substrate is fixed on the clamping mechanism 1 and moves synchronously with the insulator 100, while the other substrate is in a floating state. Due to the inertial hysteresis effect, the two substrates generate relative displacement, causing the first friction layer 21 and the second friction layer 22 to periodically contact and separate. Since the triboelectric series of the two substrates is different, electrons are transferred from nylon to PTFE when they contact, and the first electrode is separated when they separate. Alternating pulse electrical energy is generated between electrode 23 and the second electrode 24. After rectification and voltage regulation by the power management module, it continuously powers the acoustic emission sensor, enabling it to continuously pick up the high-frequency stress waves released by the expansion of internal defects in insulator 100 over a long period of time. This invention solves the problem of gravity-induced vibration transmission in clamping mechanism 1 through an elastic rubber layer, realizes the conversion of vibration energy into electrical energy through inertial hysteresis, and achieves zero-power operation by having the motor work only briefly during installation and retain clamping by thread self-locking after power failure. The three together constitute a complete self-sustaining power supply scheme, providing an energy guarantee for online acoustic emission monitoring of internal defects in insulator 100 without the need for an external power source.

[0034] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A power supply device for an insulator defect detection system, characterized in that: include, A clamping mechanism (1) is used to clamp and fix the insulator (100) to the outside; An energy harvesting unit (2) is fixed on the clamping mechanism (1) and generates electrical energy by utilizing the mechanical vibration of the insulator (100); The contact portion between the clamping mechanism (1) and the insulator (100) is provided with an elastic vibration transmission element (3). The elastic vibration transmission element (3) is located between the contact surfaces of the clamping mechanism (1) and the insulator (100) and is used to undergo elastic deformation and generate a clamping force in the clamping state, so as to press the clamping mechanism (1) against the surface of the insulator (100) and transmit the mechanical vibration of the insulator (100) to the energy harvesting unit (2).

2. The power supply device for the insulator defect detection system according to claim 1, characterized in that: The elastic vibration transmission element (3) is an elastic rubber layer.

3. The power supply device for the insulator defect detection system according to claim 1 or 2, characterized in that: The energy harvesting unit (2) includes a first friction layer (21), a second friction layer (22), a first electrode (23), and a second electrode (24); The first friction layer (21) and the second friction layer (22) are disposed opposite to each other, and their triboelectric sequences are different; the first electrode (23) is disposed on the side surface of the first friction layer (21) away from the second friction layer (22), and the second electrode (24) is disposed on the side surface of the second friction layer (22) away from the first friction layer (21); The first friction layer (21) and the second friction layer (22) periodically come into contact and separate due to the mechanical vibration of the insulator (100), so that alternating electrical energy is generated between the first electrode (23) and the second electrode (24).

4. The power supply device for the insulator defect detection system according to claim 3, characterized in that: The energy harvesting unit (2) also includes a first substrate (25) and a second substrate (26); The first electrode (23) is disposed on the side surface of the first substrate (25) facing the second friction layer (22), and the first friction layer (21) is disposed on the side surface of the first electrode (23) facing the second friction layer (22); The second electrode (24) is disposed on the side surface of the second substrate (26) facing the first friction layer (21), and the second friction layer (22) is disposed on the side surface of the second electrode (24) facing the first friction layer (21); The first substrate (25) or the second substrate (26) is fixed on the clamping mechanism (1), and the first substrate (25) and the second substrate (26) can move relative to each other.

5. The power supply device for the insulator defect detection system according to claim 4, characterized in that: The first friction layer (21) is a PTFE friction layer, and the second friction layer (22) is a nylon film.

6. The power supply device for the insulator defect detection system according to claim 1, characterized in that: The clamping mechanism (1) includes two opposing grippers (11) and a drive assembly (12) connected between the two grippers (11), the drive assembly (12) being used to drive the two grippers (11) to close towards each other or open away from each other.

7. The power supply device for the insulator defect detection system according to claim 6, characterized in that: The clamping mechanism (1) also includes a base box (13), the drive assembly (12) is adapted to be installed on the outside of the base box (13), and the base box (13) is fixed to the fittings of the insulator (100).

8. The power supply device for the insulator defect detection system according to claim 7, characterized in that: The drive assembly (12) includes a drive component (121), a double-ended screw (122), and a limiting component (123). The double-ended screw (122) is rotatably connected to the base box (13). The double-ended screw (122) has two external threads with opposite directions of rotation. The two jaws (11) respectively engage with the two external threads. The limiting member (123) is fixedly connected to the base box (13), and the two grippers (11) are slidably connected to the limiting member (123); The drive unit (121) is installed on the outside of the base box (13). The output end of the drive unit (121) is connected to the double-ended screw (122) for driving the double-ended screw (122) to rotate.

9. The power supply device for the insulator defect detection system according to claim 8, characterized in that: The driving component (121) is a motor. After the motor drives the double-ended screw (122) to rotate and completes the clamping, it is de-energized and the clamping is maintained by the self-locking of the double-ended screw (122).

10. The power supply device for the insulator defect detection system according to claim 1, characterized in that: It also includes a power management module and an acoustic emission sensor; The input terminal of the power management module is electrically connected to the power output terminal of the energy harvesting unit (2) to convert the power generated by the energy harvesting unit (2) into DC power suitable for powering the electrical load. The acoustic emission sensor is mounted on the clamping mechanism (1) or on the outer wall of the insulator (100) and is electrically connected to the output terminal of the power management module to receive electrical energy and pick up the acoustic emission signal of the insulator (100).

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