阅读说明：本技术 一种面向架空输电线路的振动能量自驱动系统 (Vibration energy self-driving system for overhead transmission line ) 是由 冯运 王季宇 吴寒 刘凡 张宗喜 刘睿 谢茜 廖文龙 骆欣瑜 龙震泽 于 2021-11-02 设计创作，主要内容包括：本发明涉及一种面向架空输电线路的振动能量自驱动系统,属于能源技术领域。该系统包括振动能量收集与转换装置、电能调理电路与封装外壳；振动能量收集与转换装置包括多层立体螺旋式摩擦纳米发电机与助动组件,用以收集振动能量并将其转化成交流形式的电能；电能调理电路包括整流桥、储能电容与稳压器,用以将摩擦纳米发电机产生的交流电能转化为直流电能并进行储存,再以稳定的输出电压给传感器供能；封装外壳用以对振动能量收集与转换装置以及对电能调理电路的整体密封。本系统能够高效收集架空输电线路振动能量并转换为传感器件可利用的电能,用以维持电力系统架空输电线路分布式传感器的无源化工作。(The invention relates to a vibration energy self-driving system for an overhead transmission line, and belongs to the technical field of energy. The system comprises a vibration energy collecting and converting device, an electric energy conditioning circuit and a packaging shell; the vibration energy collecting and converting device comprises a multilayer three-dimensional spiral friction nano generator and an auxiliary component and is used for collecting vibration energy and converting the vibration energy into electric energy in an alternating current form; the electric energy conditioning circuit comprises a rectifier bridge, an energy storage capacitor and a voltage stabilizer, and is used for converting alternating current electric energy generated by the friction nano generator into direct current electric energy for storage and supplying energy to the sensor by stable output voltage; the packaging shell is used for integrally sealing the vibration energy collecting and converting device and the electric energy conditioning circuit. The system can efficiently collect vibration energy of the overhead transmission line and convert the vibration energy into electric energy which can be used by a sensing device, so that the non-source work of the distributed sensor of the overhead transmission line of the power system can be maintained.)

1. The utility model provides a vibration energy self-actuating system towards overhead transmission line which characterized in that: the system comprises a vibration energy collecting and converting device, an electric energy conditioning circuit and a packaging shell;

the vibration energy collecting and converting device comprises a multilayer three-dimensional spiral friction nano generator and an auxiliary component and is used for collecting vibration energy and converting the vibration energy into electric energy in an alternating current form.

2. A vibrational energy self-driving system for an overhead transmission line according to claim 1, wherein: the multilayer three-dimensional spiral friction nano generator comprises a multilayer three-dimensional spiral framework, a first electrode, a second electrode and a friction film.

3. A vibration energy self-driving system facing an overhead transmission line according to claim 2, wherein: the multilayer three-dimensional spiral skeleton is of a flat spring-like structure, and the spiral layer of the skeleton is provided with an upper surface and a lower surface.

4. A vibration energy self-driving system facing an overhead transmission line according to claim 3, wherein: the first electrode and the second electrode are metal foils and are respectively and independently attached to the upper surface and the lower surface of the multilayer three-dimensional spiral skeleton.

5. A vibration energy self-driving system facing an overhead transmission line according to claim 4, wherein: the metal foil is gold, silver, aluminum, copper or iron.

6. A vibration energy self-driving system facing an overhead transmission line according to claim 5, wherein: the friction film is attached to the upper surface of the first electrode, a certain gap exists between the friction film and the second electrode, and friction charges are generated by the friction film and the second electrode through contact.

7. A vibration energy self-driving system facing an overhead transmission line according to claim 6, wherein: the friction film is polyethylene, polypropylene, polytetrafluoroethylene or polyimide.

8. A vibration energy self-driving system facing an overhead transmission line according to claim 7, wherein: the power-assisted assembly comprises a cylindrical weight and a cylindrical beam column;

the center of the cylindrical weight is provided with a circular through hole, the through hole can be inserted into the cylindrical beam column to assist the weight to move in the vertical direction, the bottom of the weight is adhered to the top end of the multilayer three-dimensional spiral skeleton, and the multilayer three-dimensional spiral friction nano-generator is driven to contact and separate under the excitation of vibration to generate electric energy;

the electric energy conditioning circuit comprises a rectifier bridge and a voltage regulating circuit, wherein the rectifier bridge is used for converting alternating current electric energy generated by the friction nano generator into direct current electric energy; the energy storage capacitor is used for storing direct current electric energy; and the voltage stabilizer is used for supplying the direct current energy stored by the storage module to the sensor with stable 5V output voltage.

9. A vibrational energy self-driving system for an overhead transmission line according to claim 8, wherein: the rectifier bridge is a KBU810 type rectifier module;

the energy storage capacitor is 10-100 mu F;

the voltage stabilizer is 7085 three-terminal voltage stabilizer.

10. A vibrational energy self-driving system for an overhead transmission line according to claim 9, wherein: the packaging shell comprises a circular top plate, a circular bottom plate and a cylindrical hollow circular tube shell and is used for integrally sealing the vibration energy collecting and converting device and the electric energy conditioning circuit.

Technical Field

The invention belongs to the technical field of energy, and relates to a vibration energy self-driving system for an overhead transmission line.

Background

The overhead transmission line is used as an important carrier for power system energy transmission, has the characteristics of large span, variable operating environment and obvious difference of climate conditions, needs distributed sensors with various attributes to monitor the state information of the transmission line, and ensures the reliable and stable operation of the power system. The problem of energy supply of the distributed sensors with large quantity and variety is a difficult problem existing at present, and the traditional energy supply mode cannot achieve the energy supply effect of 'one-time deployment and long-term effectiveness' due to respective limitations. It is a viable solution by seeking available energy in the surrounding environment and efficiently converting it into electrical energy. The wire vibration is ubiquitous in the overhead transmission line, and when the wire is under the action of transverse laminar wind, the karman vortex generated on the leeward side causes micro-vibration which easily enables the wire to alternate up and down. These redundant, stray, random, minute vibrational energies hold the promise of being harvested and further converted into electrical energy that can be harnessed. Therefore, the vibration energy collection technology for solving the problem of energy supply to the distributed sensor of the overhead transmission line has practical engineering application significance.

The invention of the friction nano generator brings a new way for collecting tiny, redundant and stray energy in the environment. According to the principle of triboelectrification and electrostatic induction, the surfaces (at least one of which is made of insulating material) of two materials with different electronegativities are separated by periodic contact, redundant mechanical energy in the surrounding environment can be directly converted into electric energy, and the device is a flexible, efficient and sustainable energy conversion device. The friction nano-generator generally collects vibration energy in a contact separation working mode, but it is difficult for the conventional contact separation type friction nano-generator to obtain high conversion efficiency and electric energy output in a narrow vibration space.

For the power transmission line, which is a special narrow scene, the structure of the friction nano generator needs to be designed to be more compact and flexible. Thus, by introducing a novel three-dimensional multilayer structure, excellent flexibility can be provided on the one hand, facilitating the adjustment of the spatial dimensions. On the other hand, the space utilization rate can be improved, so that the vibration excitation can be sensitively and efficiently responded, and the high-power output is improved. Therefore, by utilizing the novel friction nano generator, the micro vibration energy of the overhead transmission line can be effectively collected and converted into electric energy, and finally, a self-driving system is constructed, so that the energy supply problem of the line distributed sensor is solved.

Disclosure of Invention

In view of the above, the present invention aims to provide a vibration energy self-driving system facing an overhead transmission line, so that the system can realize continuous energy supply to a wire distributed sensor by collecting vibration energy of the overhead transmission line.

In order to achieve the purpose, the invention provides the following technical scheme:

a vibration energy self-driving system for an overhead transmission line comprises a vibration energy collecting and converting device, an electric energy conditioning circuit and a packaging shell;

the vibration energy collecting and converting device comprises a multilayer three-dimensional spiral friction nano generator and an auxiliary component and is used for collecting vibration energy and converting the vibration energy into electric energy in an alternating current form.

Optionally, the multilayer three-dimensional spiral friction nano-generator includes a multilayer three-dimensional spiral skeleton, a first electrode, a second electrode and a friction film.

Optionally, the multilayer three-dimensional spiral skeleton is of a flat spring-like structure, and the spiral layer of the skeleton has an upper surface and a lower surface.

Optionally, the first electrode and the second electrode are metal foils and are respectively and independently attached to the upper surface and the lower surface of the multilayer three-dimensional spiral skeleton.

Optionally, the metal foil is gold, silver, aluminum, copper or iron.

Optionally, the rubbing film is attached to the upper surface of the first electrode, and has a certain gap with the second electrode, and the rubbing film and the second electrode generate a triboelectric charge by contacting.

Optionally, the friction film is polyethylene, polypropylene, polytetrafluoroethylene or polyimide.

Optionally, the power-assisted assembly comprises a cylindrical weight and a cylindrical beam column;

the center of the cylindrical weight is provided with a circular through hole, the through hole can be inserted into the cylindrical beam column to assist the weight to move in the vertical direction, the bottom of the weight is adhered to the top end of the multilayer three-dimensional spiral skeleton, and the multilayer three-dimensional spiral friction nano-generator is driven to contact and separate under the excitation of vibration to generate electric energy;

the electric energy conditioning circuit comprises a rectifier bridge and a voltage regulating circuit, wherein the rectifier bridge is used for converting alternating current electric energy generated by the friction nano generator into direct current electric energy; the energy storage capacitor is used for storing direct current electric energy; and the voltage stabilizer is used for supplying the direct current energy stored by the storage module to the sensor with stable 5V output voltage.

Optionally, the rectifier bridge is a KBU810 type rectifier module;

the energy storage capacitor is 10-100 mu F;

the voltage stabilizer is 7085 three-terminal voltage stabilizer.

Optionally, the package housing includes a circular top plate, a circular bottom plate, and a cylindrical hollow circular tube casing for integrally sealing the vibration energy collecting and converting device and the electric energy conditioning circuit.

The invention has the beneficial effects that: the system can efficiently collect vibration energy of the overhead transmission line and convert the vibration energy into electric energy which can be used by a sensing device, so that the non-source work of the distributed sensor of the overhead transmission line of the power system can be maintained.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.

Drawings

For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic structural view of a vibration energy harvesting and converting device and a package housing thereof;

FIG. 2 is a schematic diagram of the operation of a multi-layer three-dimensional spiral friction nano-generator;

fig. 3 is a circuit diagram of the electric energy conditioning circuit of the vibration energy self-driven system.

Reference numerals: 1-multilayer three-dimensional spiral friction nano generator, 2-cylindrical weight, 3-cylindrical beam column, 4-packaging shell, 5-framework, 6-electrode and 7-friction film.

Detailed Description

The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.

Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.

The self-driven energy supply system can specifically realize self-driven energy supply of micro-power consumption (0.1-10 mW) distributed sensors of vibration, temperature, humidity and the like in the power transmission line.

The invention provides a vibration energy self-driving system for an overhead transmission line, which comprises a vibration energy collecting and converting device, an electric energy conditioning circuit and a packaging shell, wherein the vibration energy collecting and converting device is arranged on the outer side of the vibration energy self-driving system;

fig. 1 is a schematic structural diagram of a vibration energy collecting and converting device and a packaging shell thereof, wherein the vibration energy collecting and converting device mainly comprises a multilayer three-dimensional spiral friction nano-generator 1 and an auxiliary component. As shown in the enlarged view at the lower right corner of the multilayer three-dimensional spiral friction nano-generator, the upper surface and the lower surface of the multilayer three-dimensional spiral framework 5 are respectively attached with metal foils 6 as a first electrode and a second electrode. The friction film 7 is attached to the surface of the first electrode to form a contact separation type friction nano generator with the second electrode. The power-assisted assembly comprises a cylindrical weight 2 and a cylindrical beam column 3, the lower surface of the cylindrical weight is adhered to the top end of the multilayer three-dimensional spiral friction nano-generator, and when external vibration excitation is carried out, the weight and a reference plane generate relative displacement to promote the friction nano-generator to be in contact separation. The cylindrical beam column is positioned in the central through hole of the cylindrical weight to ensure that the weight can stably move in the vertical direction to prevent shaking. The packaging shell 4 is a cylindrical closed space formed by a cylindrical hollow circular tube shell, a circular top plate and a circular bottom plate, and internal devices are prevented from being interfered by external environment.

Fig. 2 is a working principle of a multilayer three-dimensional spiral friction nano-generator, under the action of vibration excitation, a booster drives a second electrode of the friction nano-generator to form physical contact with a friction film, and at this stage, due to the difference of charge affinity of friction materials, two friction layers carry charges with equal quantity and different sign, as shown by i in the figure. When the excitation is released, the two friction layers begin to separate from each other, and under the driving of the potential difference, charge movement is formed between the first and second electrodes through an external circuit, as shown in ii in the figure. The movement of the charge continues to the maximum separation position as indicated by iii in the figure. When the two friction layers are brought into contact again, the potential difference gradually decreases to zero, at which point the charge flows back, as shown at iv. By such periodic contact separation, the friction generator will generate an alternating current pulse signal to output electric energy to the outside.

Fig. 3 is a diagram of an electric energy conditioning circuit of the vibration energy self-driven system, wherein an output port of the vibration energy collecting and converting device is connected to the electric energy conditioning circuit shown in fig. 3, the collected alternating current electric energy is converted into a direct current form through a rectifier bridge module, and an energy storage capacitor C is charged. The stored electrical energy is delivered to port 1 of regulator U0 and a regulated 5V dc voltage is output from port 3 to meet the power requirements for the distributed sensor.

The embodiment also provides a preparation method of each module, and firstly, the preparation method of the vibration energy collecting and converting device is explained.

The vibration energy collecting and converting device mainly comprises a multilayer three-dimensional spiral friction nano generator and a power assisting assembly. The skeleton of the three-dimensional spiral friction nano-generator of multilayer adopts organic glass material, utilizes laser cutting machine to cut into the external diameter with the organic glass board that thickness is 1mm and is 8cm, and the internal diameter is 6 cm's opening ring, and its open end of 6 the same rings constitutes three-dimensional spiral structure than adjacent adhesion, keeps the 2mm clearance between spiral layer and the layer. Thereafter, a metal foil having a thickness of 100 μm was washed with alcohol and pure water, dried in an oven, and sufficiently adhered to the upper and lower surfaces of the frame with an adhesive to form first and second electrodes. Finally, a 500 μm thick rubbing film was also washed and dried, and then attached to the upper surface of the first electrode with a conductive paste.

The cylindrical weight of the power-assisted assembly is an epoxy resin disc with the diameter of 6cm and the thickness of 6mm, and a through hole with the diameter of 2cm is cut at the center of the disc. Secondly, the cylindrical beam column is manufactured by cutting an epoxy resin round bar with the diameter of 1.9cm into a cylinder with the height of 8 cm. The lower surface of the weight is adhered to the top end of the multilayer three-dimensional spiral friction nano generator, and the weight and the multilayer three-dimensional spiral friction nano generator are aligned in the vertical direction. The beam column penetrates through the center through hole of the weight to be used as a moving guide rail of the weight in the vertical direction.

Correspondingly, the electric energy conditioning circuit mainly comprises a rectifier bridge module, an energy storage capacitor and a voltage stabilizer module. The rectifier bridge module converts periodic alternating current electric energy output by the friction nano generator into direct current electric energy and then continuously charges the energy storage capacitor, and the stored electric energy outputs stable direct current voltage through the voltage stabilizer module. The rectifier bridge is a KBU810 type rectifier module. The capacitance value of the energy storage capacitor can be selected to be 10-1000 muF according to the actual energy supply requirement. The voltage stabilizer module is a 7085 three-terminal voltage stabilizer.

Correspondingly, the packaging shell is of a cylindrical closed structure and seals the vibration energy collecting and converting device and the electric energy conditioning circuit. The shell is made of opaque organic glass, and the packaging grade meets engineering technical requirements of dust prevention, water prevention, shock prevention, ageing resistance and the like.

Therefore, the construction of the vibration energy self-driving system is completed, so that the system can efficiently collect the vibration energy of the overhead transmission line and convert the vibration energy into the electric energy through the vibration energy collecting and converting device with the multilayer three-dimensional spiral structure, the direct current electric energy which can be utilized by the sensing device is output through the electric energy conditioning circuit, and the energy supply requirement on the distributed sensor of the transmission line is met.

Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.