CN111564985B - Sensing device and force monitoring system of sensing type friction nano generator and tire - Google Patents
Sensing device and force monitoring system of sensing type friction nano generator and tire Download PDFInfo
- Publication number
- CN111564985B CN111564985B CN202010309018.5A CN202010309018A CN111564985B CN 111564985 B CN111564985 B CN 111564985B CN 202010309018 A CN202010309018 A CN 202010309018A CN 111564985 B CN111564985 B CN 111564985B
- Authority
- CN
- China
- Prior art keywords
- tire
- layer
- friction
- sensing
- deformation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 18
- 238000009459 flexible packaging Methods 0.000 claims abstract description 46
- 239000000758 substrate Substances 0.000 claims description 47
- 238000005259 measurement Methods 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 31
- 238000004088 simulation Methods 0.000 claims description 27
- 238000012360 testing method Methods 0.000 claims description 27
- 238000010248 power generation Methods 0.000 claims description 15
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000002086 nanomaterial Substances 0.000 claims description 6
- 238000011156 evaluation Methods 0.000 claims 2
- 230000003068 static effect Effects 0.000 description 9
- 230000005611 electricity Effects 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- -1 polytetrafluoroethylene Polymers 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910021393 carbon nanotube Inorganic materials 0.000 description 2
- 239000002041 carbon nanotube Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229920005557 bromobutyl Polymers 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002783 friction material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C23/00—Devices for measuring, signalling, controlling, or distributing tyre pressure or temperature, specially adapted for mounting on vehicles; Arrangement of tyre inflating devices on vehicles, e.g. of pumps or of tanks; Tyre cooling arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L17/00—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies
- G01L17/005—Devices or apparatus for measuring tyre pressure or the pressure in other inflated bodies using a sensor contacting the exterior surface, e.g. for measuring deformation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
- G01M17/02—Tyres
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to the technical field of nano new energy, in particular to a sensing device and a force monitoring system of a sensing type friction nano generator and a tire. The sensing type friction nano generator comprises a first flexible packaging cavity, two conducting layers and two friction layers, wherein the two conducting layers are fixedly arranged on two opposite inner walls of the first flexible packaging cavity respectively, the two friction layers are fixedly arranged on the two conducting layers respectively, the two conducting layers are electrically connected, and the two friction layers are contacted under the action of pretightening force. The structure is simple, moisture-proof, stable and flexible, and can sense the deformation characteristics of the structure. The sensing device of the tire is used for sensing the deformation of the tire by using the sensing type friction nano generator. The force monitoring system of the tire can monitor the stress condition of the tire.
Description
Technical Field
The invention belongs to the technical field of nano new energy, and particularly relates to a sensing device and a force monitoring system of a sensing type friction nano generator and a tire.
Background
The power generation principle of the friction nanometer generator is that when two different materials are contacted under the action of mechanical force, the surfaces of the two different materials can generate positive and negative static charges under the action of contact electricity; when the two materials are separated, positive and negative charges generated by contact electrification are separated, and then an induced potential difference is generated between the electrodes of the two materials and electrons are induced; if a load is connected between the electrodes of the two materials or the two materials are in a short circuit state, the induced potential difference drives the induced electrons to flow between the two electrodes through an external circuit so as to form alternating current.
The existing friction nanometer generator can only be used as a generating set generally, and converts collected mechanical energy into electric energy, so that the function is single; in addition, in order to ensure that the conventional friction nano generator can generate power continuously, the conventional friction nano generator is often under the continuous action of mechanical force, so that the stability and the reliability of the structure of the conventional friction nano generator are poor, and the mechanical property of the mounting position of the conventional friction nano generator under stress can be seriously influenced; meanwhile, the friction material or the electrode in the friction nano generator is exposed to moisture for a long time, and the electric output performance and the energy conversion efficiency of the friction nano generator are adversely affected.
Disclosure of Invention
The main purpose of the present invention is to provide a sensing type friction nano-generator, which has a simple structure, excellent stability and flexibility, reliable moisture resistance, and is capable of sensing its own deformation characteristics.
The invention also provides a sensing device of the tire, which comprises the sensing type friction nano generator disclosed by the invention, wherein the sensing type friction nano generator deforms along with the tire deformation and generates alternating current.
The invention also provides a tire force monitoring system which can monitor the stress condition of the tire.
The invention also provides a force estimation method of the tire, which is used for realizing the force estimation of the tire.
The invention discloses a sensing type friction nanometer generator, which comprises: the flexible packaging structure comprises a first flexible packaging cavity, a first conducting layer, a second conducting layer, a first friction layer and a second friction layer, wherein the first conducting layer, the second conducting layer, the first friction layer and the second friction layer are arranged in the first flexible packaging cavity;
the first conducting layer and the second conducting layer are respectively and fixedly arranged on a group of opposite inner walls of the first flexible packaging cavity, one surface of the first conducting layer, facing the second conducting layer, is fixedly provided with the first friction layer, and one surface of the second conducting layer, facing the first conducting layer, is fixedly provided with the second friction layer; the first conducting layer is electrically connected with the second conducting layer, and the first friction layer is in mutual contact with the second friction layer under the action of pretightening force;
when two opposite side walls of the first flexible packaging cavity where the first friction layer and the second friction layer are located are pulled away from each other by opposite-direction pulling forces, a gap is formed between the first friction layer and the second friction layer; when the tension force on the two opposite side walls of the first flexible packaging cavity is reduced, the part of the first friction layer, which generates a gap with the second friction layer, is gradually close to the second friction layer under the action of the pre-tightening force until the first friction layer and the second friction layer are restored to be in contact; at the moment, the sensing type friction nano generator generates alternating current, and the electric signal characteristic of the alternating current is specifically associated with the stress deformation characteristic of the sensing type friction nano generator.
Optionally, the first conductive layer includes a first substrate layer and a first electrode layer, the first substrate layer is fixedly mounted on the inner wall of the first flexible packaging cavity, and the first electrode layer is fixedly mounted on a surface of the first substrate layer close to the first friction layer;
and/or the second conducting layer comprises a second substrate layer and a second electrode layer, the second substrate layer is fixedly arranged on the inner wall of the first flexible packaging cavity, and the second electrode layer is fixedly arranged on the surface, close to the second friction layer, of the second substrate layer.
Optionally, the first substrate layer and/or the second substrate layer and the first flexible packaging cavity are of an integrated insulating structure made of the same material.
Optionally, the first friction layer and the first electrode layer are an integral conductive structure made of the same material, or the second friction layer and the second electrode layer are an integral conductive structure made of the same material.
Optionally, the first conductive layer and/or the second conductive layer comprise a flexible substrate and a conductive medium mixed with the flexible substrate to form a flexible conductive film layer.
Optionally, a surface of the first friction layer facing the second friction layer is a wave arc surface, or a surface of the second friction layer facing the first friction layer is a wave arc surface, or opposite surfaces of the first friction layer and the second friction layer are symmetrical wave arc surfaces.
Optionally, a micro-nano structure is arranged on one surface of the first friction layer facing the second friction layer and/or one surface of the second friction layer facing the first friction layer.
The sensing device of the tire comprises an energy module, a sensing module and a signal output module, wherein the energy module, the sensing module and the signal output module are arranged in the tire;
the sensing module comprises at least one sensing type friction nano generator, the sensing type friction nano generator is fixedly arranged on the inner surface of the tread of the tire, and the sensing type friction nano generator deforms along with the sensing type friction nano generator and generates alternating current at the moment of the forced deformation of the tire;
the signal output module can output the electric signal obtained from the sensing module under the energy of the energy module.
Optionally, the sensing type friction nano-generator is divided into an axial deformation measurement TENG and/or a circumferential deformation measurement TENG and/or a torsional deformation measurement TENG according to different installation positions of the sensing type friction nano-generator;
the axial deformation measuring TENG is fixedly arranged on a circumferential central line of the inner surface of the tire tread, two friction layers of the axial deformation measuring TENG are respectively positioned on two sides of the circumferential central line, and the axial deformation measuring TENG is used for sensing the axial deformation of the tire;
the circumferential deformation measuring TENG is fixedly arranged on the circumferential central line, the extending directions of two friction layers of the TENG are perpendicular to the circumferential central line, and the circumferential deformation measuring TENG is used for sensing the circumferential deformation of the tire;
torsion deformation measurement TENG fixed mounting be in on the circumference central line and its two friction layers are located respectively the both sides of circumference central line, torsion deformation measurement TENG with axial deformation measurement TENG jointly is right the torsion deformation of tire is responded to, axial deformation measurement TENG with torsion deformation measurement TENG is in distance on the circumference central line is less than the ground connection imprint half-length of tire.
Optionally, the energy module comprises at least one friction nano-generator for power generation, each friction nano-generator for power generation is fixedly installed on the inner surface of the tread or the inner surface of the sidewall of the tire, and generates alternating current under pressure when periodically passing through a ground contact footprint area of the tire;
the sensing device of the tire further comprises an energy management module, the energy management module and the signal output module are sequentially connected in series, and the energy management module can convert alternating current generated by the energy module into direct current to be supplied to the signal output module.
A force monitoring system of a tire is used for monitoring the stress state of the tire, and comprises a sensing device of the tire, and an estimation display module arranged in a vehicle and electrically connected with a vehicle-mounted power supply of the vehicle, wherein the estimation display module is in signal connection with a signal output module of the sensing device of the tire;
the estimation display module can estimate and display the stress condition of the tire according to the electric signal output by the signal output module.
Optionally, the force monitoring system of the tire further comprises a vehicle-mounted electronic control system, and the vehicle-mounted electronic control system is in signal connection with the estimation display module; and when the stress of the tire estimated by the estimation display module exceeds a preset range, the vehicle-mounted electric control system can adjust the running state of the automobile.
A method of force estimation of a tire:
carrying out finite element simulation or bench test on the tire under different tire pressures under the condition of pure axial force; constructing a first correlation between the electric signal characteristics of the alternating current generated by the sensing type friction nano-generator according to any one of claims 1 to 7 and the axial deformation of the tire body based on finite element simulation data or bench test data;
based on finite element simulation data or bench test data, further obtaining a first relational expression among tire pressure, axial force and axial deformation of the tire body on the basis of a general axial deformation expression of the tire body;
under the actual working condition of automobile running, measuring the working condition tire pressure and the working condition electric signal characteristics of the sensing type friction nano generator, and calculating according to the first correlation and the first relational expression to obtain the magnitude of the axial force borne by the tire;
and/or the presence of a gas in the gas,
carrying out finite element simulation or bench test on the tire under different tire pressures under the condition of pure circumferential force; constructing a second association between the electric signal characteristics of the alternating current generated by the sensing type friction nano generator and the circumferential deformation of the tire body based on finite element simulation data or bench test data; based on finite element simulation data or bench test data, further obtaining a second relational expression among the tire pressure, the circumferential force and the circumferential deformation of the tire body on the basis of the general circumferential deformation expression of the tire body;
under the actual working condition of automobile running, measuring the working condition tire pressure and the working condition electric signal characteristics of the sensing type friction nano generator, and calculating according to the second correlation and the second relational expression to obtain the magnitude of the circumferential force borne by the tire;
and/or the presence of a gas in the gas,
carrying out finite element simulation or bench test on the tire under different tire pressures under the condition of pure aligning torque; constructing a third association between the electric signal characteristics of the alternating current generated by the sensing type friction nano generator and the torsional deformation of the tire body based on finite element simulation data or bench test data;
based on finite element simulation data or bench test data, further obtaining a third relation among the tire pressure, the aligning moment and the tire body torsional deformation on the basis of the general tire body torsional deformation expression;
and under the actual working condition of automobile running, measuring the working condition tire pressure and the working condition electric signal characteristics of the sensing type friction nano generator, and calculating the aligning moment borne by the tire according to the third correlation and the third relational expression.
The invention has the beneficial effects that:
the invention discloses a sensing type friction nano generator which comprises a first flexible packaging cavity, a first conducting layer, a second conducting layer, a first friction layer and a second friction layer, wherein the first conducting layer and the second conducting layer are respectively and fixedly arranged on two inner walls in the first flexible packaging cavity; the two conductive layers are electrically connected, and the two friction layers made of different materials are contacted with each other under the action of pretightening force and are extruded and rubbed to generate positive and negative static charges; when two opposite side walls of a first flexible packaging cavity where the two friction layers are located are pulled away from each other by opposite-direction pulling force, positive and negative static charges are separated, induction potential difference is generated between the two conductive layers and drives electrons to flow in a communication circuit between the two conductive layers to form alternating current, and the electrical signal characteristics of the alternating current are specifically related to the stress deformation characteristics of the sensing type friction nano generator. The structure is simple, moisture-proof, stable and flexible, and can sense the deformation characteristics of the structure.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a cross-sectional view of one embodiment of a sensored triboelectric nanogenerator of the invention;
FIG. 2 is a cross-sectional view of a second embodiment of a sensored triboelectric nanogenerator according to the invention;
FIG. 3 is a cross-sectional view of a third embodiment of a sensored triboelectric nanogenerator according to the invention;
FIG. 4 is a cross-sectional view of a fourth embodiment of a sensored triboelectric nanogenerator according to the invention;
FIG. 5 is a cross-sectional view of a fifth embodiment of a sensored triboelectric nanogenerator according to the invention;
FIG. 6 is a schematic structural view of one embodiment of a sensing device of the tire of the present invention;
FIG. 7 is a schematic structural view of one embodiment of a sensing module mounted on the inner surface of a tread in the sensing device of a tire of the present invention;
FIG. 8 is a schematic structural view of one embodiment of the present invention of a sensored triboelectric nanogenerator mounted as an energy element on the inner surface of a tread;
FIG. 9 is a schematic structural view of one embodiment of a flexible friction nano-generator as an energy unit mounted on the inner surface of a tread;
FIG. 10 is a schematic structural diagram of one embodiment of the flexible triboelectric nanogenerator of FIG. 9;
FIG. 11 is a schematic diagram of the configuration of one embodiment of the force monitoring system of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
In the description of the present application, it is to be understood that the terms "length", "inner", "outer", "axial", "radial", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected or detachably 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The present invention proposes a sensing type friction nano-generator, a first embodiment of which, as shown in fig. 1, comprises:
the flexible packaging structure comprises a first flexible packaging cavity 1, a first conducting layer 2, a second conducting layer 3, a first friction layer 4 and a second friction layer 5.
As shown in fig. 1, a first embodiment of the flexible friction nanogenerator of the invention is characterized in that a first conductive layer 2 and a second conductive layer 3 are respectively and fixedly arranged on a group of opposite inner walls of a first flexible packaging cavity 1, a first friction layer 4 is fixedly arranged on one surface of the first conductive layer 2 facing the second conductive layer 3, and a second friction layer 5 is fixedly arranged on one surface of the second conductive layer 3 facing the first conductive layer 2; in particular, the first conductive layer 2 is electrically connected with the second conductive layer 3, and the first friction layer 4 and the second friction layer 5 are in contact with each other under the action of a pretightening force.
When two opposite side walls of the first flexible packaging cavity 1 where the two friction layers are located are pulled away from each other by opposite-direction pulling forces, a gap is formed between the first friction layer 4 and the second friction layer 5 until the two friction layers are separated; when the pulling force applied to the two opposite side walls of the first flexible packaging cavity is reduced, the part of the two friction layers generating the gap is gradually close to the original part until the contact is restored under the action of the original pre-tightening force.
In the above structure, originally, two friction layers in contact with each other due to a pre-tightening force can be squeezed and rubbed with each other to generate positive and negative static charges, when the first friction layer 4 and the second friction layer 5 are pulled and deformed along with the first flexible packaging cavity 1, the positive and negative static charges generate an induced potential difference between the two conductive layers, and electrons can flow between the two electrically connected conductive layers under the drive of the induced potential difference to further form alternating current.
Here, the electrical signal characteristics (voltage signal or current signal) of the alternating current generated by the sensing type friction nano generator of the present invention are related to the deformation characteristics of the friction nano generator of the present invention (more specifically, related to the interval d generated by the tension between the two friction layers); when the friction nano generator is arranged on the surface of an object, the deformation of the installation position of the friction nano generator can be indirectly reflected. Therefore, the sensing type friction nano generator can generate electricity, and the electric signal of the alternating current generated by the sensing type friction nano generator can reflect the deformation characteristic of the sensing type friction nano generator, so that the sensing type friction nano generator has the sensing function.
In addition, the arrangement of the first flexible packaging cavity 1 can protect the internal conducting layer and the friction layer, and provides a relatively clean and dry closed environment for the internal structure, so that the stability and the reliability of the whole structure of the sensing type friction nano generator are improved, the service life of the sensing type friction nano generator is prolonged, and the electrical output performance and the energy conversion efficiency are optimized. Meanwhile, the sensing type friction nanometer generator has excellent flexibility, and the mechanical property of the installation position of the sensing type friction nanometer generator under stress cannot be influenced excessively.
In this embodiment, further, the material of the first friction layer 4 and the material of the second friction layer 5 may be different, and not adjacent to each other in the triboelectric series, and the sequences in the triboelectric series are as far away from each other as possible, so that the first friction layer 4 and the second friction layer 5 can generate more charges when contacting each other, which is more beneficial for the sensing type triboelectric nanogenerator of the present invention to generate current.
Here, the material of the first friction layer 4 may be one of polytetrafluoroethylene, polydimethylsiloxane, polyimide, polyvinylidene fluoride, polyethylene terephthalate, carbon nanotube, elastic silicone, epoxy resin, brominated butyl rubber, and nylon, and the material of the second friction layer 5 may be one of the above materials, as long as it is different from the material of the first friction layer 4.
In this embodiment, further, the first flexible packaging cavity 1 may be made of an insulating material including at least one of rubber, silica gel, elastic resin, and polyimide, so as to meet the flexibility requirement of the first flexible packaging cavity 1.
The second embodiment of the invention is based on the structure of the first embodiment:
providing a first conductive layer 2 comprising a first substrate layer 201 and a first electrode layer 202; the first substrate layer 201 is fixedly installed on the inner wall of the first flexible packaging cavity 1, and the first electrode layer 202 is fixedly installed on the surface, close to the first friction layer 4, of the first flexible substrate layer 201;
or,
providing a second conductive layer 3 comprising a second substrate layer 301 and a second electrode layer 302; the second substrate layer 301 is fixedly installed on the inner wall of the first flexible packaging cavity 1, and the second electrode layer 302 is fixedly installed on the surface, close to the second friction layer 5, of the second substrate layer 301;
still alternatively, the first and second substrates may be,
as shown in fig. 2, the first conductive layer 2 includes a first substrate layer 201 and a first electrode layer 202, and the second conductive layer 3 includes a second substrate layer 301 and a second electrode layer 302.
In the above structure, the first base layer 201 and the second base layer 301 have both flexibility and elasticity; the flexibility of the sensing type friction nano generator can be larger than that of the mounting position of the sensing type friction nano generator, so that the mechanical property of the mounting position under stress can not be influenced too much; meanwhile, the elastic property of the sensing type friction nano generator is favorable for the sensing type friction nano generator to generate elastic deformation when being stressed.
The third embodiment of the invention is based on the structure of the second embodiment:
arranging a first substrate layer 201 and a first flexible packaging cavity 1 to be of an integrated insulation structure with the same material; or, the second substrate layer 301 and the first flexible packaging cavity 1 are arranged to be of an integrated insulation structure with the same material; further alternatively, as shown in fig. 3, the first substrate layer 201, the second substrate layer 301 and the first flexible packaging cavity 1 are an integrated insulating structure made of the same material.
Here, it can also be understood that, when the materials of the first substrate layer 201 and the second substrate layer 301 are simultaneously suitable for being made into the material of the first flexible packaging cavity 1, the inner wall of the first flexible packaging cavity 1 can be used as the substrate of the first electrode layer 202 and the second electrode layer 302 while enclosing to form a closed cavity, so as to simplify the structure; when the materials of the first substrate layer 201 and the second substrate layer 301 are not suitable for the material of the first flexible packaging cavity 1, the substrate layers and the first flexible packaging cavity 1 need to be arranged independently.
The fourth embodiment of the present invention is based on the structures of the second and third embodiments of the present invention:
the first friction layer 4 and the first electrode layer 202 are integrally formed of the same material, or the second friction layer 5 and the second electrode layer 302 are integrally formed of the same material.
As shown in fig. 4, on the basis of the structure of the embodiment shown in fig. 3 of the present invention, the second friction layer 5 and the second electrode layer 302 are provided with the integral conductive structure 6 made of the same material, so as to simplify the structure of the sensing type friction nano-generator of the present invention on the premise of ensuring the normal power generation of the sensing type friction nano-generator.
In the present invention, the following design can also be adopted for the structures of the first conductive layer 2 and the second conductive layer 3:
the first conductive layer 2 and/or the second conductive layer 3 comprise a flexible substrate and a conductive medium mixed with the flexible substrate to form a flexible conductive film layer. For example, the flexible substrate can be a silica gel substrate with good flexibility, even a silica gel substrate subjected to vulcanization treatment, and the conductive medium can be silver-plated glass powder, or carbon nanotubes and carbon black. Of course, there is no particular limitation on the materials selected for the flexible substrate and the conductive medium, as long as the two can be mixed to form the flexible conductive film layer. At this time, the flexibility of the structures of the first conductive layer 2 and the second conductive layer 3 is improved, and the structural integrity is improved by the mixed composition mode of the flexible substrate and the conductive medium, so that the flexible substrate is more stable and reliable.
A fifth embodiment of the present invention is based on the structure of any one of the above embodiments:
the surface of the first friction layer 4 facing the second friction layer 5 is a wave arc surface, or the surface of the second friction layer 5 facing the first friction layer 4 is a wave arc surface, or as shown in fig. 5, the opposite surfaces of the first friction layer 4 and the second friction layer 5 are both wave arc surfaces and the two wave arc surfaces are symmetrical to each other. The wave arc surface comprises at least one arc protrusion.
Thus, in the sensing type friction nano generator of the embodiment in a natural state, the first friction layer 4 and the second friction layer 5 are in contact with each other, and a gap exists;
when the two friction layers which originally have the gap are further mutually extruded by pressure, the contact area between the two friction layers is increased, more positive and negative static charges can be generated by extrusion and friction, and when the two friction layers are pulled by opposite directions, the two conducting layers generate induced potential difference to drive electrons to move to generate induced current, so that the structure can be used as an energy unit to generate electricity;
when the two friction layers which are originally contacted with each other are separated from each other, the positive static charges and the negative static charges which are originally contacted with each other are separated, an induced potential difference is generated between the two conductive layers, electrons are driven to move to form alternating current, the electrical signal characteristic of the alternating current is related to the spacing distance generated by the two friction layers which are pulled, the deformation characteristic of the sensing type friction nano generator can be reflected, and the sensing type friction nano generator has the sensing function.
In summary, the sensing type friction nano-generator of the embodiment can be used as both an energy unit to generate electricity and an induction unit to sense according to the acting force of the application environment.
Here, if the opposite surfaces of the first friction layer 4 and the second friction layer 5 are symmetric wave arc surfaces, one surfaces of the first conductive layer 2 and the second conductive layer 3 close to the friction layers may be symmetric wave arc surfaces, so that the two friction layers fixedly mounted (generally in a manner of adhering) on the opposite surfaces of the two conductive layers are symmetric wave models;
or, as shown in fig. 5, two inner walls of the first flexible packaging cavity 1 where the two conductive layers are located are symmetrical wave arc surfaces, so that the two conductive layers fixedly mounted thereon are symmetrical wave shapes, and further the two friction layers fixedly mounted on the two conductive layers are symmetrical wave shapes.
On the basis of the structure of any one of the above embodiments, there may be provided:
one surface of the first friction layer 4 facing the second friction layer 5 and/or one surface of the second friction layer 5 facing the first friction layer 4 are/is provided with a micro-nano structure. The surface of the friction layer is provided with a micro-nano structure, so that the structure period density of the surface of the friction layer and the charge density which can be generated can be improved, and the micro-nano structure can be a patterned micro-nano structure, and/or a nano composite structure, and/or a high-density grid structure.
The present invention also proposes a tyre sensing device, as shown in fig. 6, comprising:
the device comprises an energy module 7, a sensing module 8 and a signal output module 9 which are arranged inside the tire, wherein the signal output module 9 is respectively and electrically connected with the energy module 7 and the sensing module 8;
if the sensing type friction nano-generator in any of the above embodiments of the present invention is denoted as B, and the tire in which the sensing device of the tire of the present invention is located is denoted as C, then,
the sensing module 8 comprises at least one sensing type friction nano generator B, the sensing type friction nano generator B is fixedly installed on the inner surface of the tire tread of the tire C, and the sensing type friction nano generator B deforms along with the tire C at the moment of stress deformation of the tire C and generates alternating current. Of course, the electrical signal characteristics of the alternating current are specifically associated with the deformation characteristics of the sensing friction nano-generator B of the present invention, and may also be understood as being specifically associated with the deformation characteristics of the tire C at the position where the sensing friction nano-generator B is installed.
At this time, the signal output module 9 can output the characteristics of the electric signal generated by the deformation of the sensing type friction nano generator B in the sensing module 8 under the energy supply of the energy module 7.
Further, the signal output module 9 of the present invention comprises an RF transmitter 91 and an MCU micro-control unit 92 which are electrically connected. In the above structure, the RF radio frequency transmitter 91 can modulate the electrical signal received from the sensing module 8 and send the modulated electrical signal out in the form of high frequency filtering; the MCU 92 can provide in-depth control of the signal output module 9 from data reception to signal transmission.
The second embodiment of the sensing device for a tire according to the present invention is based on the first embodiment, and the sensing type friction nano-generator B according to the present invention is classified into an axial deformation measurement TENG801, and/or a circumferential deformation measurement TENG 802 and/or a torsional deformation measurement TENG 803 according to the different mounting positions. (where "TENG" is a "triboelectric Nano-Generator" in English, abbreviated as triboelectric Nano-Generator.)
As shown in fig. 7, in which an axial deformation measurement TENG801 is fixedly installed on a circumferential center line of the inner surface of the tread and two friction layers thereof are respectively located on both sides of the circumferential center line, the axial deformation measurement TENG801 can sense axial deformation of the tire C;
the circumferential deformation measurement TENG 802 is fixedly arranged on the circumferential central line of the inner surface of the tread, the extending directions of two friction layers of the tread are perpendicular to the circumferential central line, and the circumferential deformation measurement TENG 802 can sense the circumferential deformation of the tire C;
the torsional deformation measurement TENG 803 is fixedly installed on the circumferential center line of the inner surface of the tread, two friction layers of the torsional deformation measurement TENG 803 are respectively positioned on two sides of the circumferential center line, namely the installation mode of the axial deformation measurement TENG801 is consistent, the torsional deformation measurement TENG 803 can jointly sense the torsional deformation of the tire C through the axial deformation measurement TENG801, and when the torsional deformation of the tire C is sensed through the torsional deformation measurement TENG801 and the axial deformation measurement TENG801, the distance between the torsional deformation measurement TENG 803 and the axial deformation measurement TENG801 on the circumferential center line is smaller than half the length of a ground contact footprint of the tire C.
Further, when the above sensing type friction nano-generators are arranged on the inner surface of the tread, the sensing type friction nano-generators are arranged as uniformly as possible on the premise that the use requirements (for example, when one axial deformation measuring TENG801, one circumferential deformation measuring TENG 802 and one torsional deformation measuring TENG 803 exist as one sensing unit, the axial deformation measuring TENG801 is adjacent to the torsional deformation measuring TENG 803, and in the above three sensing type friction nano-generators, the distance between every two adjacent sensing type friction nano-generators on the circumferential center line is less than half the length of the contact patch so as to simultaneously induce the axial deformation, the circumferential deformation and the torsional deformation of the tire at a certain instant when the tire is in rotational contact with the ground) are satisfied, so that the mass balance of the tire C is improved, and the dynamic balance of the tire during rotation is further improved.
The third embodiment of the tire sensor device of the present invention is based on the structure of any one of the first two embodiments, and the energy module 7 includes at least one power generation friction nano-generator, each of which is disposed on the inner surface of the tread or the inner surface of the sidewall of the tire C and generates an alternating current when being pressed when passing through the footprint of the tire C.
Here, the friction nano generator for power generation may be used as an energy unit, and a sensing friction nano generator B (as shown in fig. 8) with a wave arc surface on the opposite surface of the friction layer according to the fifth embodiment of the sensing friction nano generator of the present invention may be used, and it should be noted that the sensing friction nano generator B as the energy unit and the sensing friction nano generator B as the sensing unit are only structurally the same, and the specific parameter design of the two is necessary to satisfy the energy requirement and the sensing requirement of the sensing device of the tire of the present invention.
Of course, the friction nano-generator for power generation here is used as an energy unit, and another flexible friction nano-generator D (as shown in fig. 9 and 10) may be used.
The flexible friction nano-generator D comprises a second flexible packaging cavity D1, and a first conducting layer D2, a second conducting layer D3, a first friction layer D4 and a second friction layer D5 in the second flexible packaging cavity; the first conductive layer d2 and the second conductive layer d3 are respectively and fixedly arranged on a group of opposite inner walls of the second flexible packaging cavity, the first friction layer d4 and the second friction layer d5 which is made of different materials are respectively and fixedly arranged on the first conductive layer d2 and the second conductive layer d3, and a spacing distance exists between the first friction layer d4 and the second friction layer d 5; the first conductive layer d2 is electrically connected to the second conductive layer d 3.
When the above structure is deformed by pressure in the direction of the first conductive layer d2 and the second conductive layer d3, the first friction layer d4 and the second friction layer d5 can approach each other to contact, and at this time, the surfaces of the two friction layers generate positive and negative static charges due to contact and extrusion; when the pressure applied to the structure is reduced, the first friction layer d4 and the second friction layer d5 can be separated from contact and away from each other, and at this time, an induced potential difference is generated between the two conductive layers and drives electrons to flow through a circuit electrically connected between the first conductive layer d2 and the second conductive layer d3, so that alternating current is formed, and power generation is realized.
The flexible friction nano generator D is simple in structure, the second flexible packaging cavity D1 can buffer pressure, the internal conducting layer and the friction layer are protected, a relatively clean and dry closed environment is provided for the internal structure, the stability and the reliability of the whole structure of the flexible friction nano generator D are improved, the service life of the flexible friction nano generator D is prolonged, and the electric output performance and the energy conversion efficiency are optimized. Meanwhile, the flexible friction nano generator D has excellent flexibility, and the mechanical property of the installation position of the flexible friction nano generator D under stress cannot be excessively influenced.
In addition to the friction nano-generator for power generation, as shown in fig. 6, an energy management module 11 is further provided, which includes a switch 111, a transformer 112, a rectifier bridge 113 and a capacitor 114, which are electrically connected. The switch 111 can solve the impedance mismatch problem of the electric energy collected by the friction nanometer generator for power generation, and improves the transfer efficiency of the electric energy; the transformer 112 can increase the output current and increase the charging speed of the capacitor 114; the alternating current output by the transformer 112 is converted into direct current by the rectifier bridge 113, and then is stored in the capacitor 114 to supply power to the subsequent signal output module 9.
The energy module 7 comprises the structural design of the friction nano generator for generating electricity, so that the induction device of the tire can perform the task of monitoring the stress of the tire without additionally connecting other power supplies.
Here, regarding the process of generating the alternating current by the energy collection module 7, the flexible friction nano generator D is taken as an energy unit as an example:
the tyre has a contact patch when rolling;
when the flexible friction nano-generator D installed on the inner surface of the tread and/or the inner surface of the sidewall of the tire C does not enter the grounding print area, a spacing distance exists between two friction layers inside the flexible friction nano-generator D;
when the flexible friction nano generator D arranged on the inner surface of the tread and/or the inner surface of the sidewall of the tire C gradually enters the grounding imprint area, the flexible friction nano generator D is pressed, two friction layers in the flexible friction nano generator D gradually approach to contact, and the two friction layers are in contact electrification;
when the flexible friction nano generator D arranged on the inner surface of the tread and/or the inner surface of the sidewall of the tire C gradually leaves the grounding print area, the pressure borne by the flexible friction nano generator D is reduced, the two friction layers in the flexible friction nano generator D are gradually far away to restore to the state with an interval, and an induced potential difference is generated between the two conducting layers in the flexible friction nano generator D to drive electrons to flow so as to form induced current;
since the flexible friction nano-generator D mounted on the inner surface of the tread and/or the inner surface of the sidewall of the tire C periodically passes through the footprint when the tire C rolls, an induced current is periodically generated to form an alternating current.
In the above embodiment, the size of the selected sensing type friction nano-generator B or the selected flexible friction nano-generator D is based on the condition that the mechanical property of the tire C is not affected, the mounting position is preferably based on the condition that the mass balance and the dynamic balance of the tire are not affected, and the number of the selected friction nano-generators for power generation, the electrical connection relationship (series and/or series-parallel) of the plurality of friction nano-generators for power generation, the area of the friction layer in each friction nano-generator for power generation, and the interval between the two friction layers need to be designed comprehensively, so that the whole energy collection module 7 can meet the electric power of the signal output module 9 as necessary.
The present invention also provides a tire force monitoring system for monitoring a stress condition of a tire, as shown in fig. 11, which includes: the tire sensing device further comprises an estimation display module 10 which is arranged in the vehicle and electrically connected with a vehicle-mounted power supply A of the vehicle, and the estimation display module 10 is in signal connection with a signal output module 9 of the tire sensing device. The estimation display module 10 can estimate and display the stress condition of the tire according to the electric signals output by the signal output module 9.
Optionally, as shown in fig. 11, the estimation display unit 10 further includes an RF receiver 101, an onboard control unit 102, and an LED display screen 103, which are electrically connected. The RF receiver 101 receives the high-frequency filtering transmitted by the RF transmitter 91, modulates the high-frequency filtering into an electrical signal, analyzes and processes the electrical signal by the vehicle-mounted control unit 102 (which may be a micro control unit), and displays the electrical signal on the LED display screen 103 in a data form for the vehicle interior personnel, particularly the driver to view.
Further, the tire force monitoring system of the present invention further includes a vehicle-mounted electronic control system 12, and when the tire force estimated by the estimation display module 10 exceeds a preset range (tire force range ensuring safe driving of the vehicle), the vehicle-mounted electronic control system 12 can adjust the running state of the vehicle to ensure that the force applied to the vehicle tire is within a safe range.
The invention also provides a method for estimating the force of the tire, which comprises the following steps:
carrying out finite element simulation or bench test on the tire under different tire pressures under the condition of pure axial force;
constructing a first association between the electric signal characteristics of the alternating current generated by the sensing type friction nano-generator and the axial deformation of the tire body based on finite element simulation data or bench test data (the electric signal characteristics are related to the deformation of the sensing type friction nano-generator, here, the deformation of the sensing type friction nano-generator is used as the local deformation of the tire, and a specific calculable relationship exists between the local deformation and the global axial deformation of the tire body);
meanwhile, based on finite element simulation data or bench test data, a general axial deformation expression (a theoretical formula known by a person skilled in the art) of the tire body is as follows:
Fx＝xc0×Kcx(P) wherein FxIs an axial force, xc0Is the axial deformation of the carcass, Kcx(P) is a function of the tire pressure P,
further obtaining a first relational expression among the tire pressure, the axial force and the axial deformation of the tire body:
Fx＝xc0×(Kcx1P+Kcx2)；
wherein, FxIs an axial force, xc0Is the axial deformation of the tire body, P is the tire pressure, kcx1And kcx2Identifying the obtained parameters;
under the actual working condition of automobile running, the working condition tire pressure and the working condition electric signals of the sensing type friction nanometer generator are measured, and the magnitude of the axial force applied to the tire at a specific moment can be calculated according to the first relational expression and the first relation.
And/or the presence of a gas in the gas,
under similar thinking, setting pure circumferential force conditions, and carrying out finite element simulation or bench test on the tire under different tire pressures;
constructing a second association between the electric signal characteristics of the alternating current generated by the sensing type friction nano-generator and the circumferential deformation of the tire body based on finite element simulation data or bench test data (the electric signal characteristics are related to the deformation of the sensing type friction nano-generator, here, the deformation of the sensing type friction nano-generator is used as the local deformation of the tire, and a calculable specific relationship exists between the local deformation and the global circumferential deformation of the tire body);
meanwhile, based on finite element simulation data or bench test data, a general circumferential deformation expression (a theoretical formula known by a person skilled in the art) of the tire body is as follows:
Fy＝xy0×Kcy(P)
wherein, FyIs a circumferential force, xy0For circumferential deformation of the carcass, Kcy(P) is a function of the tire pressure P,
further obtaining a second relational expression among the tire pressure, the circumferential force and the circumferential deformation of the tire body:
Fy＝xy0×(Kcy1P+Kcy2)；
wherein, FyIs a circumferential force, xy0Is the circumferential deformation of the tire body, P is the tire pressure, kcy1And kcy2Identifying the obtained parameters;
under the actual working condition of automobile running, the working condition tire pressure and the working condition electric signals of the sensing type friction nanometer generator are measured, and the circumferential force applied to the tire at a specific moment can be calculated according to the second relational expression and the second correlation.
And/or the presence of a gas in the gas,
setting a pure aligning moment condition, and carrying out finite element simulation or bench test on the tire under different tire pressures;
constructing a third association between the electric signal characteristics of the alternating current generated by the sensing type friction nano-generator (specifically, the torsional deformation measurement TENG and the axial deformation measurement TENG) and the carcass torsional deformation (the electric signal characteristics are related to the deformation of the sensing type friction nano-generator, and here, the deformation of the sensing type friction nano-generator is used as the local deformation of the tire and has a specific calculable relationship with the global carcass torsional deformation) according to any one of the embodiments based on finite element simulation data or bench test data;
meanwhile, based on finite element simulation data or bench test data, a general torsional deformation expression (a theoretical formula well known to those skilled in the art) in the tire body is as follows:
on the basis of (wherein, MzFor aligning moment, theta is torsion angle, Kcz(P) is a function of the tire pressure P, yθ(u) is a function of u, wherein u is x/a, x is the distance between the torsional deformation measurement TENG and the axial deformation measurement TENG on the circumferential center line, and a is the half-length of the grounding footprint), and further obtaining a third relation among the tire pressure, the magnitude of the aligning moment and the torsional deformation of the tire body:
wherein M iszThe torque is a aligning moment, theta is a torsion angle, P is a tire pressure, u is x/a, a is a half-length of a grounding trace, and x is a distance between a torsion deformation measurement TENG and an axial deformation measurement TENG on a circumferential center line; n is1And n2Identifying the obtained parameters;
under the actual working condition of automobile running, the working condition tire pressure and the working condition electric signals of the sensing type friction nanometer generator are measured, and the aligning moment of the tire at a specific moment can be calculated according to the third relational expression and the third relational expression.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (12)
1. A sensored triboelectric nanogenerator, comprising: the flexible packaging structure comprises a first flexible packaging cavity, a first conducting layer, a second conducting layer, a first friction layer and a second friction layer, wherein the first conducting layer, the second conducting layer, the first friction layer and the second friction layer are arranged in the first flexible packaging cavity;
the first conducting layer and the second conducting layer are respectively and fixedly arranged on a group of opposite inner walls of the first flexible packaging cavity, one surface of the first conducting layer, facing the second conducting layer, is fixedly provided with the first friction layer, and one surface of the second conducting layer, facing the first conducting layer, is fixedly provided with the second friction layer; the first conducting layer is electrically connected with the second conducting layer, and the first friction layer is in mutual contact with the second friction layer under the action of pretightening force;
when two opposite side walls of the first flexible packaging cavity where the first friction layer and the second friction layer are located are pulled away from each other by opposite-direction pulling forces, a gap is formed between the first friction layer and the second friction layer; when the tension force on the two opposite side walls of the first flexible packaging cavity is reduced, the part of the first friction layer, which generates a gap with the second friction layer, is gradually close to the second friction layer under the action of the pre-tightening force until the first friction layer and the second friction layer are restored to be in contact; at the moment, the sensing type friction nano generator generates alternating current, and the electric signal characteristic of the alternating current is specifically associated with the stress deformation characteristic of the sensing type friction nano generator;
the surface of the first friction layer facing the second friction layer is a wave arc surface, or the surface of the second friction layer facing the first friction layer is a wave arc surface, or the opposite surfaces of the first friction layer and the second friction layer are symmetrical wave arc surfaces.
2. The sensored triboelectric nanogenerator of claim 1, wherein:
the first conducting layer comprises a first substrate layer and a first electrode layer, the first substrate layer is fixedly arranged on the inner wall of the first flexible packaging cavity, and the first electrode layer is fixedly arranged on the surface, close to the first friction layer, of the first substrate layer;
and/or the second conducting layer comprises a second substrate layer and a second electrode layer, the second substrate layer is fixedly arranged on the inner wall of the first flexible packaging cavity, and the second electrode layer is fixedly arranged on the surface, close to the second friction layer, of the second substrate layer.
3. The sensored triboelectric nanogenerator of claim 2, wherein: the first substrate layer and/or the second substrate layer and the first flexible packaging cavity are of an integrated insulating structure made of the same material.
4. The sensored triboelectric nanogenerator of claim 2, wherein: the first friction layer and the first electrode layer are of an integral conductive structure made of the same materials or the second friction layer and the second electrode layer are of an integral conductive structure made of the same materials.
5. The sensored triboelectric nanogenerator of claim 1, wherein: the first conductive layer and/or the second conductive layer include a flexible substrate and a conductive medium mixed with the flexible substrate to form a flexible conductive film layer.
6. The sensored triboelectric nanogenerator of any of claims 1 to 5, wherein: and a micro-nano structure is arranged on one surface of the first friction layer facing the second friction layer and/or one surface of the second friction layer facing the first friction layer.
7. A tire sensing apparatus, comprising: the device comprises an energy module, a sensing module and a signal output module, wherein the energy module, the sensing module and the signal output module are arranged in a tire, and the signal output module is respectively and electrically connected with the energy module and the sensing module;
the sensing module comprises at least one sensing friction nano generator as claimed in any one of claims 1 to 6, wherein the sensing friction nano generator is fixedly installed on the inner surface of the tread of the tire, and the sensing friction nano generator is deformed accordingly and generates alternating current at the moment of the forced deformation of the tire;
the signal output module can output the electric signal obtained from the sensing module under the energy of the energy module.
8. The tire sensing apparatus of claim 7, wherein: the sensing type friction nano generator is divided into an axial deformation measurement TENG and/or a circumferential deformation measurement TENG and/or a torsional deformation measurement TENG according to different installation positions;
the axial deformation measuring TENG is fixedly arranged on a circumferential central line of the inner surface of the tire tread, two friction layers of the axial deformation measuring TENG are respectively positioned on two sides of the circumferential central line, and the axial deformation measuring TENG is used for sensing the axial deformation of the tire;
the circumferential deformation measuring TENG is fixedly arranged on the circumferential central line, the extending directions of two friction layers of the TENG are perpendicular to the circumferential central line, and the circumferential deformation measuring TENG is used for sensing the circumferential deformation of the tire;
torsion deformation measurement TENG fixed mounting be in on the circumference central line and its two friction layers are located respectively the both sides of circumference central line, torsion deformation measurement TENG with axial deformation measurement TENG jointly is right the torsion deformation of tire is responded to, axial deformation measurement TENG with torsion deformation measurement TENG is in distance on the circumference central line is less than the ground connection imprint half-length of tire.
9. The tire sensing apparatus of claim 7, wherein: the energy module comprises at least one friction nano generator for power generation, each friction nano generator for power generation is fixedly arranged on the inner surface of the tire tread or the inner surface of the tire side of the tire, and generates alternating current under pressure when periodically passing through a ground contact footprint area of the tire;
the sensing device of the tire further comprises an energy management module, the energy management module and the signal output module are sequentially connected in series, and the energy management module can convert alternating current generated by the energy module into direct current to be supplied to the signal output module.
10. A force monitoring system for a tire, for monitoring a force condition of the tire, comprising: a sensing device comprising a tire according to any one of claims 7 to 9, further comprising an evaluation display module disposed in the vehicle and electrically connected to the vehicle-mounted power source of the vehicle, said evaluation display module being in signal connection with the signal output module of the sensing device of the tire;
the estimation display module can estimate and display the stress condition of the tire according to the electric signal output by the signal output module.
11. The tire force monitoring system of claim 10, wherein: the tire force monitoring system also comprises a vehicle-mounted electric control system which is in signal connection with the estimation display module; and when the stress of the tire estimated by the estimation display module exceeds a preset range, the vehicle-mounted electric control system can adjust the running state of the automobile.
12. A method of estimating a force of a tire,
carrying out finite element simulation or bench test on the tire under different tire pressures under the condition of pure axial force; constructing a first correlation between the electric signal characteristics of the alternating current generated by the sensing type friction nano-generator according to any one of claims 1 to 7 and the axial deformation of the tire body based on finite element simulation data or bench test data;
based on finite element simulation data or bench test data, further obtaining a first relational expression among tire pressure, axial force and axial deformation of the tire body on the basis of a general axial deformation expression of the tire body;
under the actual working condition of automobile running, measuring the working condition tire pressure and the working condition electric signal characteristics of the sensing type friction nano generator, and calculating according to the first correlation and the first relational expression to obtain the magnitude of the axial force borne by the tire;
and/or the presence of a gas in the gas,
carrying out finite element simulation or bench test on the tire under different tire pressures under the condition of pure circumferential force; constructing a second association between the electric signal characteristics of the alternating current generated by the sensing type friction nano generator and the circumferential deformation of the tire body based on finite element simulation data or bench test data; based on finite element simulation data or bench test data, further obtaining a second relational expression among the tire pressure, the circumferential force and the circumferential deformation of the tire body on the basis of the general circumferential deformation expression of the tire body;
under the actual working condition of automobile running, measuring the working condition tire pressure and the working condition electric signal characteristics of the sensing type friction nano generator, and calculating according to the second correlation and the second relational expression to obtain the magnitude of the circumferential force borne by the tire;
and/or the presence of a gas in the gas,
carrying out finite element simulation or bench test on the tire under different tire pressures under the condition of pure aligning torque; constructing a third association between the electric signal characteristics of the alternating current generated by the sensing type friction nano generator and the torsional deformation of the tire body based on finite element simulation data or bench test data;
based on finite element simulation data or bench test data, further obtaining a third relation among the tire pressure, the aligning moment and the tire body torsional deformation on the basis of the general tire body torsional deformation expression;
and under the actual working condition of automobile running, measuring the working condition tire pressure and the working condition electric signal characteristics of the sensing type friction nano generator, and calculating the aligning moment borne by the tire according to the third correlation and the third relational expression.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309018.5A CN111564985B (en) | 2020-04-19 | 2020-04-19 | Sensing device and force monitoring system of sensing type friction nano generator and tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010309018.5A CN111564985B (en) | 2020-04-19 | 2020-04-19 | Sensing device and force monitoring system of sensing type friction nano generator and tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111564985A CN111564985A (en) | 2020-08-21 |
| CN111564985B true CN111564985B (en) | 2021-04-20 |
Family
ID=72073163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010309018.5A Active CN111564985B (en) | 2020-04-19 | 2020-04-19 | Sensing device and force monitoring system of sensing type friction nano generator and tire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111564985B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114070122A (en) * | 2021-11-16 | 2022-02-18 | 浙江师范大学 | Tire power generation device based on friction nanometer generator |
| CN115102423B (en) * | 2022-07-14 | 2024-03-29 | 北京纳米能源与系统研究所 | Water flow energy nano power generation device, self-driven sensor and collecting system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203410251U (en) * | 2013-08-14 | 2014-01-29 | 国家纳米科学中心 | Device for detecting pressure and speed of tire |
| CN103780134A (en) * | 2013-08-15 | 2014-05-07 | 国家纳米科学中心 | Self-driving photoelectric sensor and preparation method thereof |
| CN104811088A (en) * | 2014-12-19 | 2015-07-29 | 纳米新能源（唐山）有限责任公司 | Clingy type friction generator |
| CN104980058A (en) * | 2014-04-04 | 2015-10-14 | 纳米新能源（唐山）有限责任公司 | Air bag generator and monitoring device applying air bag generator |
-
2020
- 2020-04-19 CN CN202010309018.5A patent/CN111564985B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203410251U (en) * | 2013-08-14 | 2014-01-29 | 国家纳米科学中心 | Device for detecting pressure and speed of tire |
| CN103780134A (en) * | 2013-08-15 | 2014-05-07 | 国家纳米科学中心 | Self-driving photoelectric sensor and preparation method thereof |
| CN104980058A (en) * | 2014-04-04 | 2015-10-14 | 纳米新能源（唐山）有限责任公司 | Air bag generator and monitoring device applying air bag generator |
| CN104811088A (en) * | 2014-12-19 | 2015-07-29 | 纳米新能源（唐山）有限责任公司 | Clingy type friction generator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111564985A (en) | 2020-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111541394B (en) | Flexible friction nano generator, vertical force sensing device of tire and estimation method | |
| CN111532089B (en) | Vertical force sensing device, estimation system and estimation method for non-pneumatic tire | |
| CN111541393A (en) | Flexible friction nano generator and passive tire monitoring system | |
| CN111546838B (en) | Spoke support body assembly, rotating speed sensing device of non-pneumatic tire and estimation method | |
| CN111564985B (en) | Sensing device and force monitoring system of sensing type friction nano generator and tire | |
| US11148480B2 (en) | Tire assembly, tire monitoring system, and tire monitoring method | |
| Löhndorf et al. | Evaluation of energy harvesting concepts for tire pressure monitoring systems | |
| JP2008087512A (en) | Tire power generation device, tire sensor using the same, and tire rigidity varying device | |
| Li et al. | Miura folding based charge-excitation triboelectric nanogenerator for portable power supply | |
| TW202138219A (en) | Tire and tire sensor | |
| CN109304991B (en) | Wireless tire pressure monitoring system | |
| JP7292644B2 (en) | Tire assembly, tire monitoring system and method | |
| CN114221055B (en) | Flexible stress sensing functional current collector and preparation method and application thereof | |
| Lee et al. | A self-powering system based on tire deformation during driving | |
| TW201515872A (en) | Transportation vehicle | |
| WO2021030760A1 (en) | Electro-magnetic coupled piezolectric powering of electric vehicles | |
| Deshmukh et al. | Designing of control strategy for high voltage battery isolation in an electric vehicles | |
| CN111624360A (en) | Rotating speed sensing device, estimation system and estimation method of pneumatic tire | |
| CN202094819U (en) | Piezoelectric self-powered device for automobile tire pressure monitoring system | |
| CN108608815A (en) | Tire pressure sensing device and tire | |
| JP2017001556A (en) | Tire pressure gauge | |
| CN116638901A (en) | Array type intelligent tire strain measurement system based on paper folding structure | |
| CN108058546B (en) | Explosion-proof tire capable of generating power by utilizing dielectric elastomer based on tire deformation | |
| CN214355379U (en) | Battery-free tire pressure monitoring circuit and monitoring system | |
| CN101719736A (en) | PVDF film energy collector for automobile tyre state monitoring wireless sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |