CN110514802B - Composite piezoelectric-nano friction self-energy supply system for water quality monitoring - Google Patents
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Abstract
A combined type piezoelectricity-nanometer friction self-power supply system for water quality monitoring belongs to land resource management and control technical field, including combined type self-power supply system base, the buoyancy block, the drive plate, spacing base, the magnetic force spliced pole, drum type piezoelectric power generation device, sliding friction generator and sliding friction electricity generation sleeve, the system can float in the surface of water under the effect of buoyancy block, drum type piezoelectric power generation device can convert mechanical energy into electric energy under the effect of compression plate, metal upper substrate drives the negative pole metal material and slides downwards and can make the area of contact of negative pole metal material and positive pole metal material change, because the area change has resulted in one deck electron gain one deck electron loss, can produce induced-current when connecting external return circuit, thereby produce the electric energy. The invention can supply energy to the water quality sensor, effectively improve the monitoring efficiency of water quality, prolong the service life of electronic equipment, reduce manpower and material resources required during periodic replacement and realize sustainable intelligent management of water quality.
Description
Technical Field
The invention belongs to the technical field of land resource management and monitoring, and particularly relates to a self-powered technology for water quality monitoring.
Background
With the rapid development of industrialization, urbanization, population and society, a series of pollution problems are necessarily brought. At present, water resources are increasingly lacked, further loss and pollution of the water environment can be aggravated if attention is not paid to and treatment is not given to the water resources, the most important solution for the pollution problem is to monitor the water environment, where pollution occurs is to go from, and high-efficiency and rapid treatment is achieved. Water quality monitoring management is taken as a part of an environment early warning system, and a relatively complete water quality monitoring system is formed at present.
The water quality evaluation is to evaluate the water environment, and is mainly to qualitatively or quantitatively evaluate parameters in the water body according to corresponding quality standards and evaluation methods according to the water body application by using data monitored by the water quality to reflect the water quality pollution condition in the area. Water quality evaluation is indispensable and also a primary task in water resource protection work. The key of the water quality evaluation is to select corresponding parameters and indexes according to a correct and reasonable evaluation standard and use a correct and reasonable scientific evaluation method. Up to now, there are over one hundred methods for water quality evaluation based on rough statistics. However, due to the complex actual environment, there are many factors affecting water quality, and in addition, there are complex relationships between different evaluation factors, and these complex factors and various uncertain factors bring considerable difficulties to water quality evaluation. The existing water quality evaluation methods can be roughly divided into three categories, namely an expert scoring method, an index evaluation method and a comprehensive evaluation method. The current comprehensive evaluation method is a research hotspot in the field of water quality evaluation. The fuzzy comprehensive evaluation method is to comprehensively evaluate the water quality indexes according to the membership degree and the weight of each grade to obtain a result. The fuzzy comprehensive evaluation method is more suitable for the condition with uncertain water quality influence factors, and foreign scholars correct the water quality influence factors on the basis, so that the objectivity of the water quality evaluation to a certain degree is improved after the water quality evaluation is finished.
Along with the promotion of the industrialization process, the water quality monitoring is very important, and the setting of monitoring points at each sewage outlet for the timing acquisition and detection of data is a key link for effectively controlling the water quality state. Water quality sensors are one of the most important components for water quality monitoring. The requirements of different industries on detection are different, so that corresponding operations of detection personnel are different, and the selection of detection equipment is different. For example, most industrial wastewater is detected to be heavy metal content, and drinking water plants may need to detect various parameters such as microorganisms, organic matters, heavy metals, disinfectants and the like. The detection work of the parameters is mainly completed by various water quality sensors of the water quality detector. For example, the conductivity sensor is the most used sensing device in a water quality detector, and is mainly used for detecting the concentration of total ions in a water body, and can be classified into an electrode type, an inductance type and an ultrasonic type according to different measurement principles. The pH sensor mainly obtains the pH value of the water body by detecting hydrogen ions, the pH value is an important index of the water body, and strict requirements are provided for the pH value of the water body in multiple industries. The ORP sensor is mainly used for the oxygen reduction potential of a solution, can detect ORP data in soil and culture medium as well as water bodies, is also the sensor with the largest application field, and is usually used together with a PH sensor. Turbidity sensors measure suspended solids in water by measuring the amount of light transmitted through the water, and these suspended solids may reflect contamination of the water. Therefore, the water quality detector is frequently used in measurement of rivers, sewage and wastewater.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the composite piezoelectric-nanometer friction self-energy supply system for water quality monitoring is provided, the water quality sensor self-energy supply system capable of supplying power in real time can effectively improve the intelligent requirement of water quality monitoring, solve the problem of long-time energy supply, effectively improve the supervision efficiency of water quality, prolong the service life of electronic equipment, reduce the manpower and material resources required during periodic replacement, and realize sustainable intelligent management of water quality.
A combined type piezoelectricity-nanometer friction self-power system for water quality monitoring, characterized by: comprises a composite self-energy supply system base, a buoyancy block body, a driving plate, a limiting base, a magnetic connecting column, a drum-shaped piezoelectric power generation device, a sliding friction generator and a sliding friction power generation sleeve,
the composite self-energy-supply system base is characterized in that a threaded hole is formed in one side end of the composite self-energy-supply system base, a return spring and a plastic partition plate are arranged in the composite self-energy-supply system base, and a bonding layer is arranged outside the buoyancy block and connected with the outer surface of the composite self-energy-supply system base through the bonding layer; the driving plate comprises a spring baffle, a sealing rubber ring and a compression plate, the driving plate is arranged inside the composite self-energy-supply system base, and the spring baffle is connected with the reset spring; the limiting base is provided with a through hole, is arranged at the end part of the composite self-energy-supply system base and is connected with the through hole through a screw by a threaded hole; the drum-shaped piezoelectric power generation device is arranged in a space formed by a plastic partition plate in the composite self-powered system base, and one side of the drum-shaped piezoelectric power generation device is connected with the compression plate; the magnetic connecting column comprises a column body and a magnetic block, is arranged in a space formed by a plastic partition plate in the base of the combined self-powered system, and the column body is connected with the other side of the drum-shaped piezoelectric power generation device; the sliding friction power generation sleeve is arranged at the end part of the other side of the composite self-energy-supply system base; the sliding friction generator comprises a metal upper substrate, a cathode metal material, an anode metal material and a plastic lower polar plate, wherein the plastic lower polar plate is bonded on the inner wall of a sleeve of the sliding friction generating sleeve, and the metal upper substrate is connected with the magnetic block.
The outer surface of the combined type self-energy-supply system base is provided with an antirust coating.
The drum-type piezoelectric power generation device comprises more than one power generation unit, each power generation unit comprises a shell and a piezoelectric patch, and the piezoelectric patches are made of PZT piezoelectric ceramics or MFC piezoelectric fiber composite materials.
And the sliding friction power generation sleeve is provided with a lead hole.
Through the design scheme, the invention can bring the following beneficial effects: the composite piezoelectric-nano friction self-energy supply system for water quality monitoring utilizes the mechanical action of water flow, the piezoelectric material generates mechanical deformation under the action of impact force and buoyancy, the electric energy output of the invention can be realized through the positive piezoelectric effect existing in the material, and on the other hand, the friction material generates potential difference through induced charges under the condition of displacement generation, thereby outputting the electric energy. The electric energy of output lasts stable energy supply for the sensor in real time for the sensor can detect indexes such as metal content, PH value, suspended particles of quality of water, carries out real-time transmission and monitoring to data through wireless transmission module again.
Drawings
The invention is further described with reference to the following figures and detailed description:
FIG. 1 is a schematic structural diagram of a composite piezoelectric-nano friction self-powered system for water quality monitoring according to the present invention.
FIG. 2 is a schematic diagram of a composite piezoelectric-nano friction self-powered system base structure of the composite self-powered system for water quality monitoring according to the present invention.
FIG. 3 is a schematic diagram of the structure of the buoyancy block of the composite piezoelectric-nano friction self-powered system for water quality monitoring according to the present invention.
FIG. 4 is a schematic view of the structure of the driving plate of the composite piezoelectric-nano friction self-powered system for monitoring water quality according to the present invention.
FIG. 5 is a schematic diagram of the structure of the limiting base of the composite piezoelectric-nano friction self-powered system for water quality monitoring according to the present invention.
FIG. 6 is a schematic view of the magnetic connecting column of the composite piezoelectric-nano friction self-powered system for water quality monitoring according to the present invention.
FIG. 7 is a schematic structural diagram of a drum-type piezoelectric power generation device of a combined piezoelectric-nano friction self-powered system for water quality monitoring according to the present invention.
FIG. 8 is a schematic structural diagram of a sliding friction generator of the composite piezoelectric-nano friction self-powered system for water quality monitoring according to the present invention.
FIG. 9 is a schematic structural view of a sliding friction power generation sleeve of the composite piezoelectric-nano friction self-powered system for water quality monitoring according to the present invention.
In the figure, 1-a composite self-powered system base, 2-a buoyancy block body, 3-a driving plate, 4-a limiting base, 5-a magnetic connecting column, 6-a drum type piezoelectric power generation device, 7-a sliding friction power generator, 8-a sliding friction power generation sleeve, 111-a threaded hole, 102-a reset spring, 103-a plastic partition plate, 202-a bonding layer, 301-a spring baffle, 302-a sealing rubber ring, 303-a compression plate, 401-a through hole, 501-a cylinder, 502-a magnetic block, 601-a shell, 602-a piezoelectric sheet, 701-a metal upper substrate, 702-a cathode metal material, 703-an anode metal material, 704-a plastic lower polar plate, 801-a sleeve inner wall and 802-a lead hole.
Detailed Description
A composite piezoelectric-nano friction self-powered system for water quality monitoring is shown in figure 1 and comprises a composite self-powered system base 1, a buoyancy block 2, a driving plate 3, a limiting base 4, a magnetic connecting column 5, a drum-shaped piezoelectric power generation device 6, a sliding friction generator 7 and a sliding friction power generation sleeve 8,
as shown in fig. 2 to 9, the composite self-powered system base 1 includes a return spring 102, a plastic partition 103, and a threaded hole 111, the outer surface of the composite self-powered system base 1 is provided with an anti-rust coating for preventing the device from rusting in water, wherein the reset spring 102 can be reasonably selected according to the impact force of water flow and the size of buoyancy, the outer surface of the composite self-powered system base 1 is adhesively connected with the bonding layer 202 in the buoyancy block body 2, so that the system floats on the water surface under the action of the buoyancy block, the whole self-powered system can not sink to the water bottom, the threaded hole 111 of the composite self-powered system base 1 can be connected with the through hole 401 in the limit base 4 through a screw, the reset spring 102 in the composite self-powered system base 1, the drum-shaped piezoelectric generating device 6 can be placed in the plastic partition plate 103; the driving plate 3 consists of a spring baffle 301, a sealing rubber ring 302 and a compression plate 303, wherein the sealing rubber ring 302 is in sliding sealing contact with the inner surface of the combined self-powered system base 1, and the compression plate 303 can be pressed on the drum-type piezoelectric power generation device 6 to generate displacement and bending deformation; the magnetic connecting column 5 comprises a column 501 and a magnetic block 502, the column 501 can be bonded on the drum-shaped piezoelectric power generation device 6, and the magnetic block 502 can be adsorbed on the metal upper substrate 701; the drum-type piezoelectric power generation device 6 comprises more than one piezoelectric power generation unit, each piezoelectric power generation unit comprises a drum-type shell 602 and a piezoelectric patch 601, the piezoelectric patch 601 can be made of PZT (piezoelectric transducer) or MFC (micro-fluid channel), and the outer surface structure of the drum-type shell 602 is in a shuttle shape; the sliding friction generator 7 comprises a metal upper substrate 701, a cathode metal material 702, an anode metal material 703 and a plastic lower polar plate 704, wherein the metal upper substrate 701 drives the cathode metal material 702 to slide downwards so that the contact area between the cathode metal material 702 and the anode metal material 703 can be changed to generate electric energy, and the plastic lower polar plate 704 is bonded with the inner wall 801 of the sleeve in the friction generating sleeve 8; the friction power generation sleeve 8 comprises a sleeve inner wall 801 and a lead hole 802, and electric energy can be led out through a lead in the lead hole 802 and supplied to the water quality monitoring sensor.
The working principle of the invention is that the system can float on the water surface under the action of the buoyancy block body 2, the lower end driving plate 3 is pushed to generate displacement due to the up-and-down fluctuation of the water surface, the drum-type piezoelectric power generation device 6 can convert mechanical energy into electric energy under the action of the compression plate 303, meanwhile, due to the displacement, the metal upper substrate 701 drives the cathode metal material 702 to slide downwards, so that the contact area between the cathode metal material 702 and the anode metal material 703 can be changed, one layer of electrons are obtained and one layer of electrons are lost due to the area change, and when the system is connected with an external loop, induction current can be generated, so that electric energy is generated.
The piezoelectric material generates mechanical deformation under the action of impact force and buoyancy by utilizing the mechanical action of water flow, the electric energy output of the piezoelectric material can be realized through the positive piezoelectric effect of the material, and on the other hand, the friction material generates potential difference through induced charges under the condition of displacement generation so as to output the electric energy. The electric energy of output lasts stable energy supply for the sensor in real time for the sensor can detect indexes such as metal content, PH value, suspended particles of quality of water, carries out real-time transmission and monitoring to data through wireless transmission module again.
Claims (4)
1. A combined type piezoelectricity-nanometer friction self-power system for water quality monitoring, characterized by: comprises a composite self-energy-supply system base (1), a buoyancy block body (2), a driving plate (3), a limiting base (4), a magnetic connecting column (5), a drum-shaped piezoelectric power generation device (6), a sliding friction generator (7) and a sliding friction power generation sleeve (8),
the composite self-powered system base is characterized in that a threaded hole (111) is formed in one side end of the composite self-powered system base (1), a reset spring (102) and a plastic partition plate (103) are arranged inside the composite self-powered system base, a bonding layer (202) is arranged outside the buoyancy block body (2), and the composite self-powered system base is connected with the outer surface of the composite self-powered system base (1) through the bonding layer (202); the driving plate (3) comprises a spring baffle plate (301), a sealing rubber ring (302) and a compression plate (303), the driving plate (3) is arranged inside the combined self-powered system base (1), and the spring baffle plate (301) is connected with the return spring (102); the limiting base (4) is provided with a through hole (401), the limiting base (4) is arranged at the end part of the composite self-powered system base (1) and is connected with the through hole (401) through a screw by a threaded hole (111); the drum-type piezoelectric power generation device (6) is arranged in a space formed by a plastic partition plate (103) in the composite self-powered system base (1), and one side of the drum-type piezoelectric power generation device is connected with the compression plate (303); the magnetic connecting column (5) comprises a column body (501) and a magnetic block (502), and is arranged in a space formed by a plastic partition board (103) in the composite self-powered system base (1), and the column body (501) is connected with the other side of the drum-shaped piezoelectric power generation device (6); the sliding friction power generation sleeve (8) is arranged at the end part of the other side of the composite self-powered system base (1); the sliding friction generator (7) comprises a metal upper substrate (701), a cathode metal material (702), an anode metal material (703) and a plastic lower polar plate (704), the plastic lower polar plate (704) is bonded and arranged on the sleeve inner wall (801) of the sliding friction generating sleeve (8), and the metal upper substrate (701) is connected with the magnetic block (502).
2. The composite piezoelectric-nano friction self-powered system for water quality monitoring according to claim 1, which is characterized in that: the outer surface of the combined type self-energy-supply system base (1) is provided with an antirust coating.
3. The composite piezoelectric-nano friction self-powered system for water quality monitoring according to claim 1, which is characterized in that: the drum-type piezoelectric power generation device (6) comprises more than one power generation unit, each power generation unit comprises a shell (601) and a piezoelectric sheet (602), and the piezoelectric sheet (602) is made of PZT piezoelectric ceramics or MFC piezoelectric fiber composite materials.
4. The composite piezoelectric-nano friction self-powered system for water quality monitoring according to claim 1, which is characterized in that: and a lead hole (802) is formed in the sliding friction power generation sleeve (8).
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| CN111740639B (en) * | 2020-07-22 | 2021-06-08 | 杭州富阳伟文环保科技有限公司 | Friction nanometer generator |
| CN113556059B (en) * | 2021-08-30 | 2022-06-17 | 上海大学 | Energy collector combining piezoelectric and friction nano power generation based on vortex-induced vibration |
| CN114659739B (en) * | 2022-03-21 | 2023-01-13 | 浙江大学 | Self-powered structure vibration monitoring device based on magnetic force and triboelectric effect |
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