CN115790742A - Flow measuring device utilizing friction nano power generation - Google Patents
Flow measuring device utilizing friction nano power generation Download PDFInfo
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- CN115790742A CN115790742A CN202211476896.1A CN202211476896A CN115790742A CN 115790742 A CN115790742 A CN 115790742A CN 202211476896 A CN202211476896 A CN 202211476896A CN 115790742 A CN115790742 A CN 115790742A
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Abstract
The application discloses utilize flow measuring device of friction nanometer electricity generation includes: a first flow pipe, a second flow pipe and a receiver; the first flow pipe is used for allowing fluid to pass through, and the cross section area of the first flow pipe along the fluid flow direction is periodically changed; the second flow pipe is abutted against the outer surface of the first flow pipe; the first circulation pipe is made of an easily available electronic material; the second circulation pipe is made of volatile electron materials. When fluid flows through the first flow pipe, a periodically changing acting force is generated on the inner wall surface of the first flow pipe, so that the first flow pipe and the second flow pipe generate strain difference due to different Young moduli of materials to generate friction electrification, and further generate a periodic electric signal, wherein the period of the electric signal is related to the flow rate of the fluid. The receiver is connected with the second circulation pipe through an electric signal outgoing line and used for measuring the period of periodic electric signals generated by friction electrification of the first circulation pipe and the second circulation pipe, and then the flow of the fluid is calculated according to the period.
Description
Technical Field
The application relates to the technical field of flow measuring devices, in particular to a flow measuring device utilizing friction nanometer power generation.
Background
In the flow measurement field, the flowmeter is a comparatively common flow measurement instrument, uses comparatively extensive differential pressure flowmeter, ultrasonic flowmeter, vortex flowmeter and electromagnetic flowmeter, and these several kinds of flowmeters possess following characteristics:
the differential pressure type flowmeter is an instrument for calculating the flow according to the known fluid conditions, the geometric dimensions of a detection part and a pipeline and the pressure difference generated by the flow detection part, has low measurement precision, is influenced by installation and fluid impact in the measurement process, is easy to wear, and further causes the reduction of the measurement precision;
the ultrasonic flowmeter is an instrument for measuring the flow by detecting the action of fluid activity on an ultrasonic beam, has poor interference resistance, is easily influenced by ultrasonic noise mixed by bubbles, scales and pumps and other sound sources, and can further bring errors to flow measurement due to installation deviation and scales of a measurement pipeline;
the vortex street flowmeter is an instrument for measuring the volume flow of fluid according to the Karman vortex street principle. In the measuring process, the stability of vortex separation of the flowmeter is easily influenced by flow velocity distribution distortion and rotating flow, and a cantilever of a vortex street generator can generate additional vibration when channel fluid is impacted at high flow velocity, so that the measuring precision is reduced, and the influence of a large pipe diameter is more obvious;
the electromagnetic flowmeter measures the flow of a conductive fluid according to the electromotive force induced when the conductive fluid passes through an external magnetic field, generally only can measure the liquid flow of a conductive medium but not the flow of a non-conductive medium, and has higher requirements on the medium.
The prior patent application document CN111366203A discloses a difunctional triboelectric sensor and a difunctional test method for gas flow and liquid level height, wherein the gas flow and the liquid level height are detected by the amplitude of the output voltage of a friction nano power generation sensing assembly, and because the voltage amplitude signal of the friction nano power generation is easily influenced by factors such as temperature, pressure, humidity and the like of the environment, if the flow is judged by the amplitude, a great error can be caused.
Disclosure of Invention
In view of this, an object of the present application is to provide a flow measurement device that generates electricity by using friction nanometer, which is used to solve the problem that the existing flow meter cannot give consideration to high measurement accuracy, strong stability, difficult interference, and high compatibility with different media.
In order to achieve the above technical object, the present application provides a flow rate measuring device using friction nano power generation, comprising: a first flow pipe, a second flow pipe and a receiver;
the first flow pipe is used for allowing fluid to pass through, and the cross section area of the first flow pipe along the fluid flow direction is periodically changed;
the second flow pipe is sleeved on the first flow pipe, and the inner surface of the second flow pipe is abutted with the outer surface of the first flow pipe;
the first circulation pipe is made of an easily available electronic material;
the second flow pipe is made of volatile electronic materials;
the first flow tube and the second flow tube have different Young's moduli;
when fluid flows through the first flow pipe, the flow velocity of the fluid is changed due to the change of the sectional area of the pipeline, so that the inner wall of the first flow pipe is subjected to periodically changed acting force, and further, the first flow pipe and the second flow pipe generate periodically changed strain difference due to different Young moduli of materials; meanwhile, the friction electrification of the first flow pipe and the second flow pipe caused by the strain difference generates a periodic potential difference signal, and the period of the potential difference signal is related to the flow of the fluid; (ii) a
The receiver is used for measuring the period of a periodic potential difference signal generated by friction electrification of the first flow pipe and the second flow pipe due to the strain difference, and the flow of the fluid is calculated according to the period of the electrical signal.
Further, the wall thickness of the first and second flow tubes is uniform.
Further, the first circulation pipe is made of polytetrafluoroethylene.
Further, the second circulation pipe is made of aluminum.
Further, the pipe wall sections of the first through pipe and the second through pipe are both wavy.
Further, the device also comprises a display;
the display is electrically connected with the receiver and used for displaying the measuring result of the receiver.
It can be seen from above technical scheme that this application provides an utilize flow measurement device of friction nanometer electricity generation, includes: a first flow pipe, a second flow pipe and a receiver; the first flow pipe is used for allowing fluid to pass through, and the cross section area of the first flow pipe along the fluid flow direction is periodically changed; the second flow pipe is sleeved on the first flow pipe, and the inner surface of the second flow pipe is abutted to the outer surface of the first flow pipe; the first circulation pipe is made of an easily available electronic material; the second circulation pipe is made of volatile electronic materials; the first flow tube and the second flow tube have different Young's moduli; the receiver is connected with the second circulation pipe through an electric signal outgoing line and used for measuring the period of periodic potential difference signals generated by friction electrification of the first circulation pipe and the second circulation pipe due to the fact that strain difference exists, and then the flow of the fluid is calculated according to the period. When fluid flows through the first flow pipe, the flow velocity of the fluid is periodically changed due to the change of the internal cross-sectional area of the pipeline, so that the inner wall surface of the first flow pipe is subjected to periodically changed acting force, the acting force enables the outer surface of the first flow pipe and the inner surface of the second flow pipe to generate the same stress, but strain difference is generated due to the difference of Young modulus of the two materials, and friction electrification is generated due to the strain difference, so that a periodic potential difference signal is generated. The flow rate of the fluid is obtained by measuring the period of the electric signal in the mode, compared with the traditional flow rate of the fluid obtained by measuring the amplitude of the electric signal, the period of the measured electric signal is more stable and reliable, the measurement precision can be effectively improved, various types of fluids can be measured, the fluid flow meter is not easily interfered by factors such as sound waves and the like, and the problems that the existing flow meter cannot give consideration to high measurement precision, strong stability, difficulty in interference and high compatibility of different media are effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive labor.
Fig. 1 is a schematic view of a flow measurement device that generates electricity by using friction nano-meter provided in an embodiment of the present application.
In the figure: 1. a first flow pipe; 2. a second flow pipe; 3. and an electrical signal outlet.
Detailed Description
The technical solutions of the embodiments of the present application will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be obtained by a person skilled in the art without making any inventive step based on the embodiments in the embodiments of the present application, belong to the scope of protection claimed in the present application.
In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected" and "connected" should be interpreted broadly, and may be, for example, a fixed connection, an exchangeable connection, an integrated connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1, a flow rate measurement device using friction nano power generation provided in an embodiment of the present application includes: a first flow pipe 1, a second flow pipe 2 and a receiver (not shown); the first flow pipe 1 is used for allowing a fluid to pass through, and a cross-sectional area of the first flow pipe 1 along a fluid flow direction changes periodically, that is, a pipe diameter of the first flow pipe 1 changes periodically. The second flow pipe 2 is sleeved on the first flow pipe 1, and the inner surface of the second flow pipe 2 is abutted with the outer surface of the first flow pipe 1.
Through the first circulation pipe 1, when fluid flows through the inside of the first circulation pipe 1, the flow velocity of the fluid is periodically changed under the influence of the periodic change of the pipe diameter, so that the inner wall surface of the first circulation pipe 1 is subjected to the acting force of the periodic change. Since the outer surface of the first flow pipe 1 and the inner surface of the second flow pipe 2 are subjected to the same stress, but the young's moduli of the materials thereof are different from each other, the stress causes a difference in strain between the two, and thus a strain difference that changes periodically is formed, and frictional electrification is generated.
In addition, in the present embodiment, the first circulation pipe 1 is made of an easily available electronic material; the second circulation pipe 2 is made of volatile electron materials; the first flow tube 1 and the second flow tube 2 have different young's moduli.
Due to different Young's moduli of the first and second flow tubes, the first and second flow tubes 1 and 2 will generate different strains under the action of fluid pressure, so that relative friction occurs; meanwhile, the first flow tube 1 and the second flow tube 2 are made of easily available electrons and volatile electrons, and the first flow tube and the second flow tube are rubbed relatively to generate electricity, so that a periodic potential difference signal is generated.
The receiver is connected with the second circulation pipe 2 through an electric signal outgoing line 3 and is used for measuring the period of a periodic potential difference signal generated by friction electrification due to the fact that the first circulation pipe 1 and the second circulation pipe 2 generate a periodically-changed strain difference due to different Young moduli of materials, and further converting the flow of the fluid according to the period of the electric signal. Wherein, the electric signal outgoing line 3 outputs analog digital signals to the receiver; the receiver calculates the flow rate of the fluid according to the period of the analog digital signal.
Specifically, the first circulation pipe 1 and the second circulation pipe 2 can form a single-level mode friction nano-generator, and low-frequency mechanical energy which is difficult to collect can be efficiently converted into an electric signal by combining the comprehensive effect of friction electrification and electrostatic induction. After the second circulation pipe 2 is triboelectrically electrified, an electric signal is transmitted to a receiver through an electric signal outgoing line 3. The receiver outputs analog digital signals according to the electric signals, and the flow of the fluid is calculated according to the periodic rule of the signals. The flow measuring device utilizing friction nanometer power generation provided by the embodiment can measure various fluids, has a simple structure, and has the advantages of simplicity and convenience in manufacture, low cost, high stability and the like.
It should be noted that, in order to facilitate the staff to view the measurement result, a display may be further provided. The display is electrically connected with the receiver and used for displaying the measuring result of the receiver.
In a more specific embodiment, the pipe wall thicknesses of the first through pipe 1 and the second through pipe 2 are set to be consistent, so that the inner wall of the first through pipe is subjected to acting force when the flow rates of the two are periodically changed, and the periodic change strain difference is generated according to different Young moduli of materials to generate friction electrification, so that the period of a measured electric signal is more stable and reliable, and the measurement accuracy can be effectively improved; compared with the traditional method of obtaining the flow of the fluid by measuring the amplitude of the electric signal, the amplitude signal generated by friction nanometer power generation is easily affected by factors such as the temperature, the pressure, the humidity and the like of the environment, and if the flow is judged by only depending on the amplitude, a great error is caused.
In one embodiment, the first flow pipe 1 may be made of teflon, has a characteristic of easily obtaining electrons, and has a good corrosion resistance, so that various types of fluids can be measured.
In another embodiment, the second flow tube 2 may be made of aluminum, and has a strong possibility of losing electrons easily, so as to be convenient for friction electrification with the first flow tube 1.
As a further improvement, the pipe wall cross sections of the first through pipe 1 and the second through pipe 2 are both wavy, so that the flow velocity of the fluid flowing through can be changed in a uniform cycle, and the measurement by a receiver is facilitated.
Although the present invention has been described in detail with reference to examples, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention.
Claims (6)
1. A flow measurement device that generates electricity using tribo-nanoscopic properties, comprising: a first flow pipe, a second flow pipe and a receiver;
the first flow pipe is used for allowing fluid to pass through, and the cross section area of the first flow pipe along the fluid flow direction is periodically changed;
the second flow pipe is sleeved on the first flow pipe, and the inner surface of the second flow pipe is abutted to the outer surface of the first flow pipe;
the first circulation pipe is made of an easily available electronic material;
the second flow pipe is made of volatile electronic materials;
the first flow tube and the second flow tube have different Young's moduli;
the receiver is connected with the second flow pipe through an electric signal outgoing line;
when fluid flows through the first flow pipe, the flow velocity of the fluid is changed due to the change of the sectional area of the pipeline, so that the inner wall of the first flow pipe is subjected to the acting force of periodic change, the first flow pipe and the second flow pipe generate periodically changed strain difference due to different Young moduli of materials, meanwhile, the first flow pipe and the second flow pipe generate friction electrification due to the strain difference, and a periodic potential difference signal is generated, wherein the period of the potential difference signal is related to the flow of the fluid;
the receiver is used for measuring the period of a periodic potential difference signal generated by triboelectrification of the first flow pipe and the second flow pipe due to strain difference, and further calculating the flow of the fluid according to the period of the electrical signal.
2. The flow measuring device for generating electricity by using friction nanometer as claimed in claim 1, wherein the first and second flow tubes have the same tube wall thickness.
3. The flow rate measurement device utilizing friction nano power generation according to claim 1, wherein the first flow pipe is made of polytetrafluoroethylene.
4. The flow rate measurement device utilizing friction nano power generation according to claim 1 or 3, wherein the second flow pipe is made of aluminum.
5. The flow measuring device utilizing friction nano power generation according to claim 1 or 2, wherein the tube wall cross sections of the first flow tube and the second flow tube are both wavy.
6. The flow measurement device utilizing triboelectric nanogeneration according to claim 1, further comprising a display;
the display is electrically connected with the receiver and used for displaying the measuring result of the receiver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211476896.1A CN115790742A (en) | 2022-11-23 | 2022-11-23 | Flow measuring device utilizing friction nano power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211476896.1A CN115790742A (en) | 2022-11-23 | 2022-11-23 | Flow measuring device utilizing friction nano power generation |
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| Publication Number | Publication Date |
|---|---|
| CN115790742A true CN115790742A (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211476896.1A Pending CN115790742A (en) | 2022-11-23 | 2022-11-23 | Flow measuring device utilizing friction nano power generation |
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| CN (1) | CN115790742A (en) |
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- 2022-11-23 CN CN202211476896.1A patent/CN115790742A/en active Pending
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