CN114877918A - Integrated self-powered sensing device - Google Patents
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- CN114877918A CN114877918A CN202210530815.5A CN202210530815A CN114877918A CN 114877918 A CN114877918 A CN 114877918A CN 202210530815 A CN202210530815 A CN 202210530815A CN 114877918 A CN114877918 A CN 114877918A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/245—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
Abstract
The application discloses integrated self-power sensing device includes: the magnetic coupling is arranged at the top of the stator and is connected with the rotor through magnetic force; wherein, under the stimulation of external rotary motion, the rotor generates sensing signals and energy output. The friction nanometer generator is used for achieving a sensing function, and the rotation parameters such as the rotation speed and the direction of the tested equipment are evaluated through collecting and analyzing the output signal of the friction nanometer generator so as to judge the real-time rotation state of the tested equipment; meanwhile, the built-in electromagnetic power generation unit of the device provides stable and lasting energy supply for the whole device by collecting the rotation energy of the tested device, and the self-powered function of the sensing device is really realized.
Description
Technical Field
The application belongs to the technical field of instruments and meters, and particularly relates to an integrated self-powered sensing device.
Background
The rotary motion is one of the most basic motion forms of mechanical equipment, and the abnormal rotation parameters of the equipment caused by overload, eccentric load and bearing wear are one of the main failure manifestations of the machinery. The real-time monitoring of the mechanical rotation state is an important means for realizing the health assessment and fault early warning of mechanical equipment. At present, the measurement principle of the rotation sensor in the market mainly includes a magnetic-sensing method, a capacitance method, a centrifugal method, an electrostatic method, a photoelectric method and the like. However, none of the exceptions to sensors that use these measurement principles require an external battery or cable. The harsh working environment can lead to a sharp reduction in the life of the battery, and when these sensors run out of battery and stop working, frequent battery replacement and maintenance are required, which is undoubtedly a double hit to the working efficiency and the economic income. In order to continuously monitor the state of the mechanical rotation motion for a long time, the sensor is required to supply power to the wireless sensing node while monitoring the rotation parameters in real time, so that the long-term monitoring of the rotation state of the mechanical equipment is really realized, and a data basis is provided for the state analysis of the mechanical equipment. Therefore, it is urgently needed to develop a high-precision sensing device with self-powered and self-driven sensing functions to meet the industrial requirements.
Triboelectric nanogenerators are considered as one of the approaches to solving the problem of powering electronic devices. Since the friction nanogenerator can convert almost all types of mechanical energy into electric energy, the output signal thereof can accurately reflect the change of external excitation. Recent researchers have conducted a great deal of research on self-powered sensing technologies for triboelectric nanogenerators. Although this technology has been greatly developed and explored in recent years, there is still a problem of insufficient energy supply. This often results in that the sensing data can not be timely and completely transmitted to the receiving end, so that the sensing data has hysteresis, thereby seriously affecting the state judgment of the device under test.
In the prior art, the traditional chemical battery has limited service life and has pollution and safety risks, and the sustainable operation and the safe operation of a sensing device are seriously influenced. Furthermore, to ensure proper use of the device, the chemical batteries must be periodically maintained and replaced, which makes the sensors unable to continuously obtain a supply of energy. Meanwhile, the existing self-powered sensing technology still lacks an effective energy supply means and cannot ensure that the device continuously acquires the rotation parameters for a long time.
Disclosure of Invention
The integrated self-powered sensing device solves the technical problems that a sensor node cannot obtain continuous and stable energy supply and cannot continuously acquire rotation parameters for a long time.
In order to solve the technical problem, the application is realized by the following technical scheme:
the application provides an integrated self-power sensing device, includes: the stator is arranged in a shell, and the rotor is arranged in the shell and is rotationally connected with the stator; the magnetic coupling is arranged at the top of the stator and is connected with the rotor through magnetic force; wherein, under the stimulation of external rotary motion, the rotor generates sensing signals and energy output.
Optionally, the integrated self-powered sensing device as described above, wherein the stator comprises: the rotor comprises an FEP (Fluorinated ethylene propylene) film, an electromagnetic induction coil and a first limit bearing, wherein the FEP film is arranged on the inner wall of the shell, and the electromagnetic induction coil and the first limit bearing are respectively arranged in a preset groove at the bottom of the shell and used for stabilizing the motion of the rotor.
Optionally, in the integrated self-powered sensing device, the FEP film is disposed on a fixing beam extending inward from the inner wall of the housing.
Optionally, in the integrated self-powered sensing device, the preset groove includes: the conductive fabric is adhered to the hemispherical groove, and the annular sliding groove is adhered to the annular conductive fabric.
Optionally, the integrated self-powered sensing device as described above, wherein the rotor comprises: a magnet disc, an electrode cylinder and a top magnet disc;
optionally, in the integrated self-powered sensing device, a plurality of magnets in one-to-one correspondence with the electromagnetic induction coils in the stator are distributed on the magnet disc, two sides of the magnet disc are respectively provided with a first steel ball, a second steel ball is arranged below the magnet disc, and a metal screw connected with the second steel ball penetrates through the top of the rotor;
the outer wall of the electrode cylinder is provided with a pair of interdigital electrodes, one group of copper electrodes are connected with the metal screw penetrating through the top of the rotor through a first lead and further conducted with the second steel ball, and the other group of copper electrodes are conducted with the first steel ball through a second lead;
along with the rotation of the rotor, the magnet disc drives the array magnets on the magnet disc to rotate, and in the process, relative displacement occurs between the magnets and the electromagnetic induction coil.
Optionally, in the integrated self-powered sensing device, the first steel ball is in contact with an annular conductive fabric on the annular sliding groove to complete conduction, the second steel ball is in contact with a conductive fabric on the hemispherical groove to complete conduction, and the first steel ball and the second steel ball are further connected to the back-end circuit through the first lead-out hole and the second lead-out hole respectively.
Optionally, the integrated self-powered sensing device as described above, wherein the magnetic coupling comprises: the magnetic driving device comprises a driving disc and a second limiting bearing, wherein the driving disc is provided with another magnet which corresponds to the magnets of the top magnet disc one to one, and the driving disc is installed above the stator through the second limiting bearing.
Optionally, in the integrated self-powered sensor apparatus, the magnetic coupling further includes: the interface and the third limit bearing are arranged on the driving disc, the third limit bearing is further arranged between the driving disc and the interface, and the driving disc is connected with a rotating shaft of the tested device through the interface.
Optionally, the integrated self-powered sensing device as described above, wherein the magnetic coupling further comprises: the top cover wraps the outer side of the driving disc.
Optionally, the integrated self-powered sensing device further includes: and the sealing cover is arranged on the shell and forms an accommodating space with the shell.
Compared with the prior art, the method has the following technical effects:
the friction nanometer generator is used for achieving a sensing function, and the rotation parameters such as the rotation speed and the direction of the tested equipment are evaluated through collecting and analyzing the output signal of the friction nanometer generator so as to judge the real-time rotation state of the tested equipment; meanwhile, an electromagnetic power generation unit which is arranged in the device and consists of a stator and a rotor provides stable and lasting energy supply for the whole device by collecting the rotation energy of the tested device, so that the self-powered function of the sensing device is really realized.
The traditional rotary parameter sensing device is complex in process, high in cost and large in size, and a chemical battery or an external power supply cable needs to be arranged in the device, so that the manufacturing and maintenance cost required by a single sensing device is high, and the large-scale distributed deployment of the sensing device is severely limited. The sensor has the advantages of simple structure, low manufacturing and maintenance cost, higher sensing sensitivity, complete energy supply from the tested equipment, and no need of a built-in battery or an external cable.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1: the overall structure of the integrated self-powered sensing device in one embodiment of the application is schematically shown;
FIG. 2: a cross-sectional view of an integrated self-powered sensing device of an embodiment of the present application;
FIG. 3: a schematic cross-sectional view of a stator portion in an embodiment of the present application;
FIG. 4: the cross section of the rotor part in one embodiment of the application is schematic;
FIG. 5: the assembly of the stator part and the rotor part in one embodiment of the application is schematically shown;
FIG. 6: a schematic cross-sectional view of a magnetic coupling portion according to an embodiment of the present application;
FIG. 7: schematic drawing of the sliding contact of copper electrode-FEP film in one embodiment of this application.
The device comprises a shell, a sealing cover, a 3-FEP film, an electromagnetic induction coil, a 5-first limiting bearing, a 6-hemispherical groove, a 7-annular sliding groove, a 8-first leading-out hole, a 9-second leading-out hole, an 11-electrode cylinder, a 12-magnet disc, a 13-top magnet disc, a 14-first steel ball, a 15-second steel ball, a 16-second lead, a 17-first lead, an 18-metal screw, a 19-driving disc, a 20-top cover, a 21-second limiting bearing, a 22-third limiting bearing and a 23-interface, wherein the shell is arranged on the shell, the sealing cover is arranged on the shell, and the top cover is arranged on the shell.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
In one embodiment of the present application, as shown in fig. 1-7, an integrated self-powered sensing device comprises: the magnetic coupling is arranged at the top of the stator and is connected with the rotor through magnetic force; wherein, under the stimulation of external rotary motion, the rotor generates sensing signals and energy output. The embodiment utilizes the friction nano generator to realize the sensing function, and evaluates the rotation parameters of the tested equipment, such as the rotation speed, the direction and the like, by collecting and analyzing the output signal of the friction nano generator so as to judge the real-time rotation state of the tested equipment; meanwhile, the electromagnetic power generation unit consisting of the stator and the rotor provides stable and lasting energy supply for the whole device by collecting the rotation energy of the tested device, and the self-powered function of the sensing device is really realized.
In this embodiment, the stator is preferably made of a composite resin material to provide structural support and external protection for the device as a whole. The rotor rotates under the stimulation of external rotation movement, relative displacement is generated between a magnet positioned on the rotor and an electromagnetic induction coil on the stator, and the coil cuts a magnetic induction line to generate induction current and induction electromotive force. Meanwhile, two poles of sensing signals generated on the rotor are respectively in sliding contact with conductive fabrics arranged on the preset grooves described below through steel balls on the rotor to complete the conduction of electric signals from the rotor to the stator.
Further, as shown in fig. 1 and fig. 2, the present embodiment further includes: and the sealing cover 2 is arranged on the shell 1, and the sealing cover 2 and the shell 1 form a containing space. The sealing cover 2 provides sealing protection for the shell 1 and protects the internal structure of the shell from the external environment.
As shown in fig. 3 and 5, the stator includes: FEP film 3, electromagnetic induction coil 4 and first spacing bearing 5, FEP film 3 sets up on the 1 inner wall of casing, electromagnetic induction coil 4 with first spacing bearing 5 is arranged in respectively in the predetermined recess of 1 bottom of casing for stabilize the rotor motion.
The FEP film 3 is provided on a fixing beam extending inward from the inner wall of the housing 1.
The preset groove comprises: the conductive fabric is adhered to the hemispherical groove 6, and the annular sliding groove 7 is adhered to the annular sliding groove 7.
As shown in fig. 4 and 5, the rotor includes: a magnet disc 12, an electrode cylinder 11 and a top magnet disc 13;
a plurality of magnets which correspond to the electromagnetic induction coils 4 in the stator one by one are distributed on the magnet disc 12, a first steel ball 14 is respectively arranged on each of two sides of the magnet disc 12, a second steel ball 15 is arranged below the magnet disc 12, and a metal screw 18 connected with the second steel ball 15 penetrates to the top of the rotor;
a pair of interdigital electrodes are arranged on the outer wall of the electrode cylinder 11, wherein one group of copper electrodes-1 are connected with the metal screw 18 penetrating through the top of the rotor through a first lead 17 and further communicated with the second steel ball 15, and the other group of copper electrodes-2 are communicated with the first steel ball 14 through a second lead 16;
with the rotation of the rotor, the magnet disc 12 drives the array magnets on the magnet disc to rotate, in the process, the magnets and the electromagnetic induction coil 4 generate relative displacement, and the coil cuts the magnetic induction line to generate induction current and induction electromotive force; meanwhile, two poles of sensing signals generated on the rotor are respectively in sliding contact with conductive fabrics arranged on the preset grooves described below through steel balls on the rotor to complete the conduction of electric signals from the rotor to the stator.
When the rotor rotates, the interdigital electrodes are in periodic sliding contact with the FEP film 3 fixed on the inner wall of the stator, thereby generating an electric signal. Finally, the conduction of the sensing signal from the rotor to the stator is completed through the sliding friction between the steel balls and the conductive fabric. The top magnet disc 13 is mainly used for matching with a magnetic coupling placed on the upper part of the top cover 20.
The first steel balls 14 are in contact conduction with the annular conductive fabric on the annular sliding groove 7, the second steel balls 15 are in contact conduction with the conductive fabric on the hemispherical groove 6, and the first steel balls and the second steel balls are further connected with the rear end circuit through the first leading-out hole 8 and the second leading-out hole 9 respectively.
As shown in fig. 6, the magnetic coupling includes: a driving disk 19 and a second limit bearing 21, wherein the driving disk 19 is provided with another magnet corresponding to the magnet of the top magnet disk 13 one by one, and the driving disk 19 is installed on the top of the stator through the second limit bearing 21.
The magnetic coupling further includes: the interface 23 and the third limit bearing 22 are arranged on the driving disc 19, the third limit bearing 22 is further installed between the driving disc 19 and the interface 23, and the driving disc 19 is connected with the rotating shaft of the device to be tested through the interface 23.
The magnetic coupling further comprises: the top cover 20 is wrapped and arranged on the outer side of the driving disc 19.
Specifically, in this embodiment, the driving disk 19 has four magnets corresponding to the magnets on the top magnet disk 13 one to one, and the driving disk 19 is connected to the rotating shaft of the device to be tested through the interface 23, so as to ensure that the driving disk 19 can rotate synchronously with the rotating shaft of the device, and the magnetic attraction between the magnets drives the rotor to rotate, so as to generate the sensing signal of the friction nano-generator and the electromagnetic induction current. Therefore, the physical contact between the driving assembly and the sensing assembly is effectively avoided, and the sealing performance of the device is greatly improved. The second limit bearing 21 and the third limit bearing 22 are used for limiting the rotation posture of the driving disc 19, and the top cover 20 is used for protecting the internal components of the device from external interference.
With reference to fig. 7, in this embodiment, when the rotor rotates under the stimulation of external rotation, the interdigital electrode outside the electrode cylinder 11 makes periodic sliding contact with the FEP film 3 fixed on the inner wall of the casing 1 based on the coupling effect of contact between electricity and electrostatic induction, so as to generate regular electrical signals. The two poles of the electric signals are respectively conducted with the first steel ball 14 and the second steel ball 15 through the two groups of electrodes, the first steel ball 14 and the second steel ball 15 are respectively conducted with the annular sliding groove 7 and the conductive fabric on the hemispherical groove 6 in a contact mode, and finally the conduction of the sensing signals from the rotating component to the fixed component is completed through the first leading-out hole 8 and the second leading-out hole 9. In addition, along with the rotation of the rotor, the magnet disc 12 drives the array magnets thereon to rotate, relative displacement is generated between the magnets and the electromagnetic induction coils in the process, and according to the law of electromagnetic induction, the electromagnetic induction coils cut the magnetic induction lines to generate induced current and induced electromotive force, and then the induced current and the induced electromotive force are transmitted to an external electric appliance through the first lead-out hole 8 through a wire, so that the purpose of self-power supply is achieved. The top magnet disc 13 is provided with four magnets arranged in the same magnetic pole direction and is mainly used for matching with a magnetic coupling positioned at the upper part of the sealing cover 2.
The friction nanometer generator is used for achieving a sensing function, and rotation parameters such as the rotation speed and the direction of the tested equipment are evaluated through collecting and analyzing output signals of the friction nanometer generator so as to judge the real-time rotation state of the tested equipment; meanwhile, the built-in electromagnetic power generation unit of the device provides stable and lasting energy supply for the whole device by collecting the rotation energy of the tested device, and the self-powered function of the sensing device is really realized. The sensor has the advantages of simple structure, low manufacturing and maintenance cost, higher sensing sensitivity, complete energy supply from the tested equipment, and no need of a built-in battery or an external cable. In conclusion, the application has good market application prospect.
In the description of the present application, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
The above embodiments are merely to illustrate the technical solutions of the present application and are not limitative, and the present application is described in detail with reference to preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made in the present invention without departing from the spirit and scope of the present invention and shall be covered by the appended claims.
Claims (10)
1. An integrated self-powered sensing device, comprising: the magnetic coupling is arranged at the top of the stator and is connected with the rotor through magnetic force; wherein, under the stimulation of external rotary motion, the rotor generates sensing signals and energy output.
2. The integrated self-powered sensing device of claim 1, wherein the stator comprises: FEP film, electromagnetic induction coil and first spacing bearing, the FEP film sets up on the shells inner wall, the electromagnetic induction coil with first spacing bearing is arranged in respectively in the predetermined recess of casing bottom, be used for stabilizing the rotor motion.
3. The integrated self-powered sensing device of claim 2, wherein the FEP film is disposed on fixed beams extending inwardly from the inner wall of the housing.
4. The integrated self-powered sensing device of claim 2, wherein the pre-defined recesses comprise: the conductive fabric is adhered to the hemispherical groove, and the annular sliding groove is adhered to the annular conductive fabric.
5. The integrated self-powered sensing device of claim 4, wherein the rotor comprises: a magnet disc, an electrode cylinder and a top magnet disc;
a plurality of magnets which are in one-to-one correspondence with the electromagnetic induction coils in the stator are distributed on the magnet disc, a first steel ball is arranged on each of two sides of the magnet disc, a second steel ball is arranged below the magnet disc, and a metal screw connected with the second steel ball penetrates through the top of the rotor;
the outer wall of the electrode cylinder is provided with a pair of interdigital electrodes, one group of copper electrodes are connected with the metal screw penetrating through the top of the rotor through a first lead and further conducted with the second steel ball, and the other group of copper electrodes are conducted with the first steel ball through a second lead;
along with the rotation of the rotor, the magnet disc drives the array magnets on the magnet disc to rotate, and in the process, relative displacement occurs between the magnets and the electromagnetic induction coil.
6. The integrated self-powered sensing device as claimed in claim 5, wherein the first ball is in contact with the annular conductive fabric on the annular sliding groove, and the second ball is in contact with the conductive fabric on the hemispherical groove, and both are connected to the back-end circuit through the first and second outlet holes.
7. The integrated self-powered sensing device of claim 1, wherein the magnetic coupling comprises: the magnetic driving device comprises a driving disc and a second limit bearing, wherein the driving disc is provided with another magnet which corresponds to the magnet of the top magnet disc one to one, and the driving disc is installed at the top of the stator through the second limit bearing.
8. The integrated self-powered sensing device of claim 7, wherein the magnetic coupling further comprises: the interface and the third limit bearing are arranged on the driving disc, the third limit bearing is further arranged between the driving disc and the interface, and the driving disc is connected with a rotating shaft of the tested device through the interface.
9. The integrated self-powered sensing device of claim 8, wherein the magnetic coupling further comprises: the top cover wraps the outer side of the driving disc.
10. The integrated self-powered sensing device of any one of claims 1 to 9, further comprising: and the sealing cover is arranged on the shell and forms an accommodating space with the shell.
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| CN202210530815.5A CN114877918A (en) | 2022-05-16 | 2022-05-16 | Integrated self-powered sensing device |
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|---|---|---|---|---|
| CN115541926A (en) * | 2022-12-01 | 2022-12-30 | 中国科学院深海科学与工程研究所 | Self-powered current meter applied to ocean flow field flow velocity measurement |
| CN115864085A (en) * | 2023-02-22 | 2023-03-28 | 广东中科半导体微纳制造技术研究院 | Rotary conductive device |
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