Failure monitoring system for anti-vibration device of power transmission line based on friction nanometer generator

Abstract

The invention relates to a power transmission line anti-vibration device failure monitoring system based on a friction nano-generator, and the system comprises an energy collection module which is realized based on the friction nano-generator and is used for collecting vibration mechanical energy on a power transmission line and converting the vibration mechanical energy into electric energy to achieve the self power supply of the system; the energy management module is used for processing the electric energy converted by the energy acquisition module into an electric energy form required by the system and storing redundant electric energy; the distance sensing module is used for measuring the distance of the damper relative to a set reference point position and transmitting a measured distance signal back to the comprehensive control module; the comprehensive control module is used for receiving the distance signal and judging whether the vibration damper looses and slides relative to a set reference point position or not, and if yes, an early warning signal is generated and sent to the wireless communication module; and the wireless communication module is used for sending the early warning signal to a maintenance station server. The system is beneficial to continuous and online monitoring of the state of the anti-vibration device of the power transmission line, and is low in energy consumption, high in stability and low in implementation cost.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission line vibration monitoring, and in particular to a power transmission line vibration prevention device failure monitoring system based on a friction nanogenerator. Background Art

[0002] Under the action of high-altitude wind, the transmission line is often in a state of vibration, among which the most frequent is breeze vibration, which can cause the conductor to be damaged at the least, or even the conductor to break. When the transmission line is in low-frequency or high-frequency vibration, under the action of alternating stress, the contact surface between the strands will have a small relative slip, and the friction and sliding of the contact surface will cause the surface of the strands to wear. Repeated tangential displacement will reduce the fatigue strength of the strands, promote the generation and expansion of fatigue cracks in the strands, and eventually lead to strand breakage. In engineering, vibration-proof hardware is installed to suppress the breeze vibration of the transmission line. The vibration-proof hammer is the most commonly used vibration-proof hardware for transmission lines, which can effectively suppress the vibration of the transmission line. When the transmission line vibrates in a breeze, the vibration-proof hammer uses the steel strands to generate friction between strands, consume vibration energy, reduce the intensity of differential vibration, and thus extend the service life of the transmission line. The vibration-proof hammer is installed not far from the hanging point of the tower insulator string and is assembled on the transmission line through a wire clamp. When the clamping force is sufficient, the vibration-proof hammer will not slip or fall off. However, the anti-vibration hammer may become loose due to factors such as breeze vibration, ambient temperature changes, and bolt aging. The anti-vibration hammer may slip along the wire or even fall off. When the anti-vibration hammer deviates from a specific position, the anti-vibration effect will be greatly reduced.

[0003] The existing online monitoring related to transmission line vibration mainly monitors the operating status of the conductor, the ambient wind speed and the conductor vibration. Currently, there is a lack of online monitoring solutions directly targeting the operating status of the anti-vibration hammer itself. Summary of the invention

[0004] The purpose of the present invention is to provide a transmission line anti-vibration device failure monitoring system based on a friction nanogenerator, which is conducive to continuous and online monitoring of the state of the anti-vibration device of the transmission line, has low energy consumption, high stability and low implementation cost.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a failure monitoring system for a transmission line anti-vibration device based on a friction nanogenerator, comprising: The energy harvesting module based on the friction nanogenerator is used to collect the vibration mechanical energy on the transmission line and convert it into electrical energy to achieve self-powering of the system; The energy management module is used to process the electric energy converted by the energy collection module into the electric energy form required by the system and store the excess electric energy to improve the energy utilization efficiency and extend the operation time of the system; The distance sensing module is used to measure the distance of the anti-vibration hammer relative to the set reference point and transmit the measured distance signal back to the integrated control module; An integrated control module, used to receive the distance signal and determine whether the anti-vibration hammer has loosened or slipped relative to the set reference point. If so, an early warning signal is generated to the wireless communication module; and The wireless communication module is used to send the early warning signal to the maintenance station server.

[0006] Furthermore, the energy harvesting module comprises a multi-layer friction energy elastic plate, one end of the friction energy elastic plate is connected to the same place, one side of the friction energy elastic plate is affixed with copper foil, and the other side of the friction energy elastic plate is affixed with PVDF film, the copper foil and the PVDF film are alternately arranged up and down on the multi-layer friction energy elastic plate, and the copper foils are mutually conductive; The multi-layer friction energy elastic plate is integrated into an insulating and sealed acrylic shell. The multi-layer friction energy elastic plate is fixed between the movable resin plate and the bottom resin plate in the acrylic shell. Under the excitation of external breeze vibration, the movable resin plate vibrates vertically on the titanium alloy support rod inside the acrylic shell. The multi-layer friction energy elastic plate is continuously contacted and separated under the vertical vibration extrusion of the movable resin plate, thereby converting the vibration mechanical energy of the wire into electrical energy.

[0007] Furthermore, the energy management module converts the AC power converted by the energy collection module into power that can be supplied to the distance sensing module, the integrated control module and the wireless communication module, and stores the excess power; The energy management module includes a rectifier and filter part, a buck and voltage stabilization part and an energy storage part. The rectifier and filter part converts the AC voltage output by the energy collection module into a DC voltage that filters out high-frequency noise. The buck and voltage stabilization part steps down the DC voltage that filters out high-frequency noise from the rectifier and filter part to 3.3V, which is supplied to the distance sensing module, the integrated control module and the wireless communication module. After meeting the power supply requirements of the system, the energy storage part stores the excess electrical energy in the lithium battery for long-term use by the system.

[0008] Furthermore, the distance sensing module measures the distance of the anti-vibration hammer relative to a set reference point position, the distance sensing module is a laser ranging module, and the reference point position is a cross arm of the tower.

[0009] Furthermore, the laser ranging module adopts a high-performance laser ranging module ATK-MS53L2M.

[0010] Furthermore, the integrated control module acquires the distance signal sent by the distance sensing module and performs decoding processing to obtain distance data. The integrated control module determines whether the anti-vibration hammer has loosened or slipped relative to the set reference point position based on the distance data and generates a corresponding warning signal.

[0011] Furthermore, the early warning signal includes: if the sliding distance of the anti-vibration hammer relative to the set reference point position does not exceed the first interval, a reminder signal is generated; if the sliding distance of the anti-vibration hammer relative to the set reference point position exceeds the first interval, an alarm signal is generated, and the reminder signal and the alarm signal are both early warning signals.

[0012] Furthermore, the integrated control module adopts an MCU of model MSP430G2553.

[0013] Furthermore, when the wireless communication module receives a reminder signal from the integrated control module, it sends a reminder signal to the maintenance station server to remind the maintenance personnel; when the wireless communication module receives an alarm signal from the integrated control module, it sends an alarm signal to the maintenance station server to alert the maintenance personnel.

[0014] Furthermore, the wireless communication module adopts NRF24L01 chip.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the present invention provides a transmission line anti-vibration device failure monitoring system based on a friction nanogenerator, the system collects the vibration mechanical energy on the transmission line through an energy collection module, realizes micro energy recovery and self-power supply; the energy management module is used to process and store electrical energy, improves the energy use efficiency and prolongs the stable operation time of the system; the distance sensing module is used to measure the distance of the anti-vibration hammer relative to the set reference point position, and transmits the distance signal back to the integrated control module; the integrated control module is used to receive the distance signal transmitted by the distance sensing module and judge whether the anti-vibration hammer is loose and slipped relative to the set reference point position, if so, generates an early warning control signal to the wireless communication module; the wireless communication module is used to send the early warning signal to the maintenance station server. The present invention realizes that the self-power supply of the system can effectively reduce the safety accidents caused by replacing the battery of the sensor, and compared with the traditional power supply method, the friction nanogenerator is less affected by the environment and has lower cost; realizes continuous monitoring of the state of the anti-vibration device, timely discovers and warns of potential failure risks, and improves the safety of power grid operation; accurately judges the location of the abnormal vibration source, provides precise guidance for maintenance, and improves the inspection efficiency. The system helps to improve the intelligence level of power grid maintenance, reduce labor costs, and reduce economic losses caused by equipment failure. Therefore, it has strong practicality and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a system composition block diagram of an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of an energy harvesting module in an embodiment of the present invention; Figure 3Schematic diagram of the structure of the anti-vibration hammer in an embodiment of the present invention; Figure 4 is a schematic diagram of a system circuit in an embodiment of the present invention; Figure 5 It is a monitoring and early warning logic block diagram in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0018] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] like Figure 1 , 4 As shown, this embodiment provides a transmission line anti-vibration device failure monitoring system based on a friction nanogenerator, including: an energy collection module, an energy management module, a distance sensing module, an integrated control module and a wireless communication module.

[0021] The energy harvesting module is implemented based on a friction nanogenerator and is used to harvest vibration mechanical energy on the transmission line and convert it into electrical energy to realize system self-powering.

[0022] The energy management module is used to process the electric energy converted by the energy collection module into the electric energy form required by the system, and store the excess electric energy to improve the energy utilization efficiency and extend the operation time of the system.

[0023] The distance sensing module is used to measure the distance of the anti-vibration hammer relative to the set reference point position, and transmit the measured distance signal back to the integrated control module.

[0024] The integrated control module is used to receive the distance signal and determine whether the anti-vibration hammer has loosened or slipped relative to the set reference point. If so, an early warning signal is generated to the wireless communication module.

[0025] The wireless communication module is used to send the warning signal to the maintenance station server.

[0026] like Figure 2As shown, the energy harvesting module includes a fixed top resin plate 1 and a bottom resin plate 2, a movable resin plate 3, a multi-layer friction energy elastic plate 4 and an acrylic shell 5. One end of the friction energy elastic plate is connected to the same place, a copper foil 6 is attached to one side of the friction energy elastic plate, and a PVDF film 7 is attached to the other side. The copper foil and the PVDF film are alternately arranged up and down on the multi-layer friction energy elastic plate, and the copper foils are mutually conductive.

[0027] The multi-layer friction energy elastic plate is integrated into an insulating and sealed acrylic shell. The multi-layer friction energy elastic plate is fixed between the movable resin plate and the bottom resin plate in the acrylic shell. Under the excitation of external breeze vibration, the movable resin plate vibrates vertically on the titanium alloy support rod inside the acrylic shell. The multi-layer friction energy elastic plate continuously contacts and separates under the vertical vibration extrusion of the movable resin plate, thereby converting the vibration mechanical energy of the wire into electrical energy.

[0028] The energy management module converts the AC power converted by the energy collection module into power that can be supplied to the distance sensing module, the integrated control module and the wireless communication module, and stores the excess power.

[0029] In this embodiment, the energy management module mainly includes a rectifier and filter part, a voltage-step-down and voltage-stabilizing part, and an energy storage part. The rectifier and filter part converts the AC voltage output by the energy collection module into a DC voltage that filters out high-frequency noise. The voltage-step-down and voltage-stabilizing part steps down the DC voltage that filters out high-frequency noise to 3.3V, which is supplied to the distance sensing module, the integrated control module, and the wireless communication module. After meeting the power supply requirements of the system, the energy storage part stores the excess electric energy in the lithium battery for long-term use by the system. Specifically, the rectifier and filter part is composed of a bridge rectifier and an electrolytic capacitor. The bridge rectifier is composed of four diodes, which allows current to flow through the load in both directions and converts the AC voltage into a pulsating DC voltage. The electrolytic capacitor filters out the high-frequency part of the pulsating DC power and outputs a relatively smooth DC voltage. The core of the voltage-step-down and voltage-stabilizing part is the LTC-3588 chip, which reduces the high output DC voltage output by the rectifier and filter part to a stable DC voltage of 3.3V. The energy storage part is mainly composed of LTC4071 battery charge and discharge management chip and lithium battery. The energy of the lithium battery storage system under normal operating conditions is used to enable the energy collection module to power the system when insufficient power is collected; LCT4071 chip can prevent overcharging and over-discharging from damaging the lithium battery and extend the service life of the lithium battery.

[0030] The distance sensing module measures the distance of the anti-vibration hammer relative to a set reference point position. The distance sensing module is a laser distance measuring module, and the reference point position is a cross arm of the iron tower.

[0031] In this embodiment, the laser distance measurement module adopts a high-performance laser distance measurement module ATK-MS53L2M produced by Zhengdian Atom Company, which has the ability to accurately measure distance.

[0032] The laser distance measurement module includes a laser emitting lamp and a reflected light receiving lamp. The laser emitting lamp emits infrared light to hit the anti-vibration hammer bolt or hammer head, and the reflected light receiving lamp receives the infrared light reflected by the bolt or hammer head. The distance sensing module can calculate the distance between the anti-vibration hammer and the reference point based on the difference between the time when the laser emitting lamp emits light and the time when the reflected light receiving lamp receives light.

[0033] The structure of the vibration-proof hammer in this embodiment is as follows: Figure 3 As shown. Figure 3 It can be seen that the anti-vibration hammer head 8 is fixed to the transmission line through the anti-vibration hammer wire clamp 9. When the transmission line is affected by breeze vibration, the bolt 10 may become loose, and the relative distance between the anti-vibration hammer wire clamp and the reference point position may change. Therefore, the distance sensing module is controlled by the integrated control module to emit infrared light to the anti-vibration hammer bolt or hammer head, and the infrared light reflected by the bolt or hammer head is received by a reflected light receiving lamp, so that the change of distance can be monitored.

[0034] In this embodiment, the core of the integrated control module is a low-power MCU from Texas Instruments (TI), whose model is MSP430G2553. The MCU can receive the distance signal from the distance sensing module and control the wireless communication module to send out an early warning signal.

[0035] Specifically, the integrated control module acquires the distance signal sent by the distance sensing module and performs decoding processing to obtain distance data. The integrated control module determines whether the anti-vibration hammer is loose or slipped relative to the set reference point position based on the distance data and generates a corresponding warning signal.

[0036] The early warning signal includes: if the sliding distance of the anti-vibration hammer relative to the set reference point position does not exceed the first interval, a reminder signal is generated; if the sliding distance of the anti-vibration hammer relative to the set reference point position exceeds the first interval, an alarm signal is generated, and the reminder signal and the alarm signal are both early warning signals.

[0037] The MCU of the integrated control module obtains the distance signal of the laser ranging module through the serial port and decodes it. After the distance signal is processed, the distance data is obtained. The MCU determines whether the anti-vibration hammer has loosened and slipped relative to the set reference point position based on the distance data and generates a corresponding early warning signal. If the slip distance of the anti-vibration hammer relative to the set reference point position does not exceed the first interval, the MCU generates a reminder signal instruction; if the slip distance of the anti-vibration hammer relative to the set reference point position exceeds the first interval, an alarm signal instruction is generated. The reminder signal instruction and the alarm signal instruction are both early warning signal instructions. The monitoring and early warning logic is as follows: Figure 5 shown.

[0038] In this embodiment, the core of the wireless communication module uses the NRF24L01 chip to receive instructions from the integrated control module and send corresponding warning signals to the maintenance station server.

[0039] The wireless communication module is operated by the instructions of the integrated control module. When the wireless communication module receives a reminder signal from the integrated control module, it sends the reminder signal to the maintenance station server to remind the maintenance personnel; when the wireless communication module receives an alarm signal from the integrated control module, it sends an alarm signal to the maintenance station server to alert the maintenance personnel.

[0040] The working process of the transmission line anti-vibration device failure monitoring system based on the friction nanogenerator provided by the present invention is as follows: (1) whenever the transmission line vibrates, the energy collection module collects the vibration mechanical energy and converts it into electrical energy; (2) the energy management module processes and stores the AC electrical energy to power the system; (3) the integrated control module sends a distance reading signal instruction to the distance sensing module at a specific interval; (4) after receiving the distance reading signal instruction, the distance sensing module obtains the distance information by the time difference between sending infrared light and receiving infrared light and transmits it back to the integrated control module through the serial port; (5) the integrated control module determines the distance size and sends an instruction to the wireless communication module, and the wireless communication module sends a corresponding signal to the maintenance station server according to the instruction. (6) The patrol personnel can do corresponding preventive work according to the type of the corresponding signal received.

[0041] The above is only a preferred embodiment of the present invention, and does not limit the present invention in other forms. Any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present invention without departing from the technical solution of the present invention still belongs to the protection scope of the technical solution of the present invention.

Claims

1. A failure monitoring system for a transmission line anti-vibration device based on a friction nanogenerator, characterized in that: include: The energy harvesting module based on the friction nanogenerator is used to collect the vibration mechanical energy on the transmission line and convert it into electrical energy to achieve self-powering of the system; The energy management module is used to process the electric energy converted by the energy collection module into the electric energy form required by the system and store the excess electric energy to improve the energy utilization efficiency and extend the operation time of the system; The distance sensing module is used to measure the distance of the anti-vibration hammer relative to the set reference point and transmit the measured distance signal back to the integrated control module; An integrated control module, used to receive the distance signal and determine whether the anti-vibration hammer has loosened or slipped relative to the set reference point, and if so, generate an early warning signal to the wireless communication module; and The wireless communication module is used to send the early warning signal to the maintenance station server.

2. The power transmission line anti-vibration device failure monitoring system based on the friction nanogenerator according to claim 1 is characterized in that: The energy harvesting module comprises a multi-layer friction energy elastic plate, one end of the friction energy elastic plate is connected to the same place, one side of the friction energy elastic plate is affixed with copper foil, and the other side is affixed with PVDF film, the copper foil and PVDF film are arranged alternately up and down on the multi-layer friction energy elastic plate, and the copper foils are mutually conductive; The multi-layer friction energy elastic plate is integrated into an insulating and sealed acrylic shell. The multi-layer friction energy elastic plate is fixed between the movable resin plate and the bottom resin plate in the acrylic shell. Under the excitation of external breeze vibration, the movable resin plate vibrates vertically on the titanium alloy support rod inside the acrylic shell. The multi-layer friction energy elastic plate is continuously contacted and separated under the vertical vibration extrusion of the movable resin plate, thereby converting the vibration mechanical energy of the wire into electrical energy.

3. The power transmission line anti-vibration device failure monitoring system based on friction nanogenerator according to claim 1 is characterized in that: The energy management module converts the AC power converted by the energy collection module into power that can be supplied to the distance sensing module, the integrated control module and the wireless communication module, and stores the excess power; The energy management module includes a rectifier and filter part, a buck and voltage stabilization part and an energy storage part. The rectifier and filter part converts the AC voltage output by the energy collection module into a DC voltage that filters out high-frequency noise. The buck and voltage stabilization part steps down the DC voltage that filters out high-frequency noise from the rectifier and filter part to 3.3V, which is supplied to the distance sensing module, the integrated control module and the wireless communication module. After meeting the power supply requirements of the system, the energy storage part stores the excess electrical energy in the lithium battery for long-term use by the system.

4. The power transmission line anti-vibration device failure monitoring system based on friction nanogenerator according to claim 1 is characterized in that: The distance sensing module measures the distance of the anti-vibration hammer relative to a set reference point position. The distance sensing module is a laser distance measuring module, and the reference point position is a cross arm of the iron tower.

5. The power transmission line anti-vibration device failure monitoring system based on friction nanogenerator according to claim 4 is characterized in that: The laser distance measurement module adopts the high-performance laser distance measurement module ATK-MS53L2M.

6. The power transmission line anti-vibration device failure monitoring system based on friction nanogenerator according to claim 1 is characterized in that: The integrated control module acquires the distance signal sent by the distance sensing module and performs decoding processing to obtain distance data. The integrated control module determines whether the anti-vibration hammer is loose or slipped relative to the set reference point position based on the distance data and generates a corresponding warning signal.

7. The power transmission line anti-vibration device failure monitoring system based on friction nanogenerator according to claim 6 is characterized in that: The early warning signal includes: if the sliding distance of the anti-vibration hammer relative to the set reference point position does not exceed the first interval, a reminder signal is generated; if the sliding distance of the anti-vibration hammer relative to the set reference point position exceeds the first interval, an alarm signal is generated, and the reminder signal and the alarm signal are both early warning signals.

8. The power transmission line anti-vibration device failure monitoring system based on friction nanogenerator according to claim 6 is characterized in that: The integrated control module adopts an MCU of model MSP430G2553.

9. The power transmission line anti-vibration device failure monitoring system based on friction nanogenerator according to claim 1 is characterized in that: When the wireless communication module receives a reminder signal from the integrated control module, it sends a reminder signal to the maintenance station server to remind the maintenance personnel; when the wireless communication module receives an alarm signal from the integrated control module, it sends an alarm signal to the maintenance station server to alert the maintenance personnel.

10. The power transmission line anti-vibration device failure monitoring system based on friction nanogenerator according to claim 9, characterized in that: The wireless communication module adopts NRF24L01 chip.

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