CN113509023A - Self-powered human body sitting posture monitoring back cushion - Google Patents
Self-powered human body sitting posture monitoring back cushion Download PDFInfo
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- CN113509023A CN113509023A CN202110794968.6A CN202110794968A CN113509023A CN 113509023 A CN113509023 A CN 113509023A CN 202110794968 A CN202110794968 A CN 202110794968A CN 113509023 A CN113509023 A CN 113509023A
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- sitting posture
- posture monitoring
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 238000012545 processing Methods 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000008569 process Effects 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 8
- 230000007613 environmental effect Effects 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 3
- 230000009471 action Effects 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 7
- 239000013013 elastic material Substances 0.000 claims description 7
- 239000000741 silica gel Substances 0.000 claims description 7
- 229910002027 silica gel Inorganic materials 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 5
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910021389 graphene Inorganic materials 0.000 claims description 4
- 239000004677 Nylon Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920001296 polysiloxane Polymers 0.000 claims description 2
- 238000007650 screen-printing Methods 0.000 claims description 2
- 210000004243 sweat Anatomy 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 2
- 230000003044 adaptive effect Effects 0.000 claims 1
- 238000001125 extrusion Methods 0.000 abstract 1
- 230000036544 posture Effects 0.000 description 21
- 230000006698 induction Effects 0.000 description 7
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
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- 238000010248 power generation Methods 0.000 description 2
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 206010041591 Spinal osteoarthritis Diseases 0.000 description 1
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Images
Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/62—Accessories for chairs
-
- 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
Abstract
The invention discloses a self-powered human body sitting posture monitoring back cushion, which comprises: the main body part comprises a back cushion substrate, a stepped groove, a power supply module, a signal processing module and a communication module, the sensing part comprises a supporting base, a flexible electrode layer, a lower friction layer, a paper folding structure layer, an upper friction layer and a conductive wire, the lower friction layer consists of a lower friction layer substrate and a prismoid-shaped bulge, and an integrated molding process is adopted. The invention provides a self-powered human sitting posture monitoring back cushion based on a friction nano generator principle, which generates an electric signal through the contact and extrusion between an upper friction layer and a lower friction layer, does not need an external power supply to supply power to a sensing module, and has the advantages of simple structure, use safety and environmental friendliness.
Description
Technical Field
The invention belongs to the technical field of friction nanometer power generation, and particularly relates to a self-powered human body sitting posture monitoring back cushion.
Background
With the change of life and working modes, people keep sitting postures for a long time every day, and the problem of sedentariness is increasingly prominent. With the prolonged sitting time, people tend to select more 'comfortable' bad sitting postures, such as forward leaning, half lying, leg raising and the like, the bad sitting postures can reduce the force of muscles and ligaments, so that bones and joints bear larger force, and the joints and the bones are in a high-pressure state for a long time, so that serious hazards such as cervical spondylosis, lumbar disc herniation, body deformation, hypopsia, overweight, obesity and the like can be caused. Therefore, the sitting posture of the human body needs to be detected, and the feedback reminding is carried out on the bad sitting posture.
In the face of a long sitting time, people often select auxiliary measures such as a back cushion and a seat cushion to ensure the comfort of sitting. Therefore, the back cushion is extremely important for the correctness and the comfort of the sitting posture of people, and is also the best object for additionally arranging a sitting posture monitoring sensor. The back cushion that has the position of sitting monitoring function now, its sensor module need the power to supply power usually, and this makes back cushion volume increase, structure complicacy and be unfavorable for security and feature of environmental protection, and the operation of charging or changing the power simultaneously also leads to the use to become loaded down with trivial details.
Disclosure of Invention
The invention provides a self-powered human body sitting posture monitoring back cushion which can monitor the human body sitting posture state in the use process and can automatically supply power in the running process of a sensor, and a sensor module of the back cushion can perform self-adaptive deformation according to different human body forms.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a self-powered human sitting posture monitoring back cushion, comprising:
the main body part comprises a cushion substrate made of elastic materials, a stepped groove structure distributed on the surface of the substrate, a signal processing module, a power supply module and a communication module, wherein the cushion substrate is made of elastic materials with a porous structure, the surface of the substrate is a saddle-shaped structure conforming to an ergonomic model, and the stepped groove structure is uniformly distributed on the surface of the substrate;
the sensing part comprises a supporting base, a conductive wire, a flexible electrode layer, a lower friction layer, a paper folding structure layer and an upper friction layer, wherein the lower friction layer comprises a lower friction layer substrate and prismoid-shaped protruding structures, the prismoid-shaped protruding structures are uniformly distributed on the upper surface of the lower friction layer substrate, the upper friction layer is connected with the lower friction layer through the paper folding structure layer to form a closed space, the flexible electrode layer is positioned at the lower part of the lower friction layer, and the conductive wire is connected with the flexible electrode layer and an external circuit;
further, the main structure cushion substrate is made of an elastic material with a porous structure.
Further, the sensing part supporting base has a stepped structure and is made of silica gel.
Further, the sensing part flexible electrode layer is a graphene flexible electrode.
Furthermore, the friction layer substrate and the frustum pyramid-shaped protruding structures on the lower portion of the sensing portion are made of silica gel, and an integrated casting molding process is adopted.
Furthermore, the paper folding structure layer of the sensing part is made of polytetrafluoroethylene PTFE, the upper friction layer is made of nylon materials, and the two parts are bonded by glue.
Further, the sensing part conducting wire is a conductive silver wire which is connected with the flexible electrode layer and an external circuit.
Further, the stepped groove of the main body structure is in a matching relationship with the support base of the sensing part.
Further, the sensing part is connected with the main structure signal processing module through a conducting wire, and the signal processing module is connected with the power supply module and the communication module.
When the flexible electrode layer is used, the upper friction layer and the lower friction layer of the sensing part have different electrical properties, the two friction layers are in contact under the action of external force, the prismatic-table-shaped protruding parts of the lower friction layer generate large deformation, and because the contact plays a coupling role of electric induction and electrostatic induction, a potential difference is generated between the flexible electrode layer and the ground, so that an electric signal is generated. Meanwhile, when the external pressure is different, the deformation degree of the convex part of the lower friction layer is different, and the generated voltage signal values are different according to the contact electrification and electrostatic induction principles. Taking a practical application process as an example, when a human body leans against the cushion, firstly, the elastic cushion substrate of the main body part and the silica gel material support base of the sensing part generate self-adaptive deformation under the action of external pressure, and the top of the sensing part is in self-adaptive fit with the human body, so that the stress of the upper friction layer of the sensing part is always vertical to the contact surface of the sensing part and the human body; secondly, in the sensing part, the upper friction layer extrudes the lower friction layer under the action of pressure, the prismatic table-shaped bulges deform, and because the contact plays a coupling role of electric induction and electrostatic induction, a potential difference is generated between the flexible electrode layer and the ground, so that current is generated on the conductive wire; finally, in the main body part, the power supply module supplies power for the circuit, the signal processing module processes the received electric signals and sends the processed signals to an external terminal through the communication module, and the human body sitting posture state can be judged according to different electric signals detected by different sensing parts distributed on the self-powered human body sitting posture monitoring cushion.
When the detachable washing machine is used, the main body part and the sensing part are designed in a separated mode, and the detachable washing machine has the detachable, replaceable and detachable washing functions.
The invention has the beneficial effects that: the invention has ingenious design, and the distributed multi-sensing modules are integrated on the back cushion, so that the sitting posture state of a human body can be monitored through electric signal values measured by different sensing modules; the headrest base and the sensing part supporting base are made of elastic materials and flexible materials, so that when the sensing part receives pressure applied by a human body, a friction layer on the upper part of the sensing part is always stressed to be vertical to a contact surface of the sensing part and the human body, and the measured signal is more accurate; the upper friction layer is connected with the lower friction layer through the paper folding structure layer, so that the whole body has better adaptability, and meanwhile, the friction effect layer is not in direct contact with a human body, so that the difference of electric signals caused by human sweat and the like is avoided; the upper surface of the lower friction layer is provided with a prismatic table-shaped convex structure, and under the action of pressure, larger area change can be generated, so that the friction charge density is improved, and the triboelectric effect is enhanced; the sensing module is designed according to the friction nanometer power generation principle, has the self-powered characteristic, does not need an external power supply to supply power to the sensor, reduces the complexity of the structure, enhances the use safety and has environmental friendliness.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below, and the drawings in the description only take the sensing portion as an example, and it is obvious to those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is an isometric view of the overall construction of the present invention;
FIG. 2 is a front view of the overall structure of the present invention;
FIG. 3 is a cross-sectional view of the general structure of the present invention taken along plane A-A;
FIG. 4 is an enlarged view of a portion of FIG. 3 at I;
FIG. 5 is a schematic structural view of a main body part of the present invention;
FIG. 6 is a top view of the sensing portion of the present invention;
FIG. 7 is a front view of the sensing portion of the present invention;
FIG. 8 is a schematic diagram of an exploded view of the sensing portion of the present invention;
FIG. 9 is a schematic view of the lower friction layer structure of FIG. 8;
FIG. 10 is a schematic view of the working principle of the sensing portion when it is bent by force;
fig. 11 is a schematic view of the connection of electrical components of the main body of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-a main body part, 2-a sensing part, 11-a cushion substrate, 12-a stepped groove, 13-a power supply module, 14-a signal processing module, 15-a communication module, 21-a conductive wire, 22-a flexible electrode layer, 23-a paper folding structure layer, 24-an upper friction layer, 25-a lower friction layer, 26-a support base, 251-a lower friction layer substrate and 252-a frustum-shaped protruding structure.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the technical scheme in the embodiment of the invention will be clearly and completely described below with reference to the drawings in the embodiment of the invention, and obviously, the embodiment described only takes the sensing part stressed to be bent as an embodiment, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 7, the present invention is a self-powered human sitting posture monitoring cushion, comprising:
the main body part 1 comprises a cushion substrate 11, a stepped groove 12, a signal processing module 14, a power supply module 13 and a communication module 15.
The sensing part 2 comprises a supporting base 26, a conductive wire 21 connected with a flexible electrode layer 22, a paper folding structure layer 23, an upper friction layer 24, a lower friction layer 25, a lower friction layer substrate 251 and a frustum-shaped protruding structure 252, and is integrally formed, wherein the upper friction layer 23 and the lower friction layer 25 are connected through the paper folding structure layer 23 to form a closed space.
Further, the upper friction layer 24, the origami structure layer 23, the lower friction layer 25, the flexible electrode layer 22, and the support base 26 are assembled to ensure the center alignment in a top view.
Furthermore, the paper folding structure layer of the sensing part is made of polytetrafluoroethylene PTFE, the upper friction layer is made of nylon materials, and the two parts are bonded by glue.
Further, the lower friction layer substrate 251 and the frustum-shaped protruding structure 252 are molded by silicone and integrated.
Further, the flexible electrode layer 22 is a graphene flexible electrode and is manufactured by a screen printing process.
Further, the cushion substrate 11 is made of an elastic material with a porous structure, the supporting base 26 is made of a silica gel material, and the stepped groove 12 and the supporting base 26 have a matching relationship.
Furthermore, the supporting base 26 has a cylindrical through hole in the center, and a conductive wire 21 is disposed inside the cylindrical through hole and connects the flexible electrode layer 22 with the signal processing module 14.
In operation, fig. 4 is a front view of the initial state of the sensing portion, and fig. 3 is a top view of the initial state, when no pressure is applied to the sensing portion, the sensing portion is not deformed. When a human body leans against the cushion, firstly, the elastic cushion substrate 11 of the main body part 1 and the silica gel material supporting base 26 of the sensing part generate self-adaptive deformation under the action of external pressure, as shown in fig. 7, the top of the sensing part is in self-adaptive fit with the human body, so that the upper friction layer 24 of the sensing part 2 is always perpendicular to the contact surface of the sensing part and the human body under stress; secondly, in the sensing part 2, the paper folding structure layer 23 is folded and compressed under the action of external force, so that the upper friction layer 24 is close to and presses the lower friction layer 25 under the action of pressure, and the frustum-shaped protrusions 252 of the upper friction layer are deformed, and due to the coupling effect of electric and electrostatic induction caused by contact, in the contact and pressing process of the upper friction layer 24 and the lower friction layer 25, due to the difference of electron affinity of contact surface materials, electric charges are transferred from the upper surface of the lower friction layer 25 to the lower surface of the upper friction layer 24, correspondingly, electric charges are transferred between the lower surface of the lower friction layer 25 and the flexible electrode layer 22 and between the upper surface of the upper friction layer 24 and a human body, and thus, current is generated on the conductive wire 21; finally, in the main body portion 1, the power supply module 13 supplies power to the circuit, and the signal processing module 14 processes the received electric signal and transmits the processed signal to an external terminal through the communication module 15. According to different electric signals measured by different sensing parts distributed on the self-powered human sitting posture monitoring cushion, the human sitting posture state can be judged.
It can be understood that, due to different human sitting postures, different pressures applied to different sensing parts distributed on the self-powered human sitting posture monitoring cushion lead to different pressures between the upper friction layer 24 and the lower friction layer 25, so that the area deformation amount of the frustum-shaped protruding structure 252 is different, the degree of electric signals generated by the frustum-shaped protruding structure is different according to the coupling principle of contact electrification and static induction, and the human sitting posture state can be monitored according to the difference of signals between different sensing parts 2.
It can be understood that the upper friction layer 24 and the lower friction layer 25 are connected by the paper folding structure layer 23, so that a certain initial distance is provided between the upper friction layer 24 and the lower friction layer 25 to facilitate the generation of the triboelectric effect, and meanwhile, the paper folding structure layer 23 has the property of being contracted under the action of external force and recovering the original shape when the external force is removed, so that the invention has the property of being reusable.
It can be understood that, since the flexible electrode layer 22 is a graphene flexible electrode, it can deform to a certain extent, and thus, when the flexible electrode layer is subjected to an external force, the structural and functional integrity of the flexible electrode layer can be ensured.
It can be understood that, because the main body part 1 is made of elastic material with porous structure, the supporting base 26 of the sensing part 2 is made of silica gel, and the stepped groove 12 of the main body part 1 and the supporting base 26 of the sensing part 2 have a matching relationship, the two parts can be freely disassembled and assembled, and when the sensing part 2 is acted by external force, the sensing part 2 can be self-adaptively deformed according to different force application conditions, so that the force applied on the upper friction layer 24 of the sensing part 2 is always vertical to the contact surface of the sensing part 2 and the human body, and the accuracy of the measured electric signal is ensured.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (12)
1. The utility model provides a self-powered human position of sitting monitoring cushion which characterized in that: comprises a main body part (1) and a sensing part (2);
the main body part (1) comprises a cushion substrate (11), a stepped groove (12), a power supply module (13) and a signal processing module (15);
the sensing part (2) comprises a conductive wire (21), a flexible electrode layer (22), a paper folding structure layer (23), an upper friction layer (24), a lower friction layer (25) and a supporting base (26), wherein the lower friction layer (25) comprises a lower friction layer substrate (251) and a prismoid-shaped protruding structure (252).
2. A self-powered human seating posture monitoring back cushion according to claim 1, wherein said sensing portion (2) is evenly distributed on the upper surface of the main body portion (1), and the stepped recess (12) of the main body portion (1) is in a fitting relationship with the supporting base (26) of the sensing portion (2), and both are freely detachable and assemblable.
3. A self-powered human sitting posture monitoring cushion according to claim 1, wherein the cushion base (11) is made of an elastic material with a porous structure, and the supporting base (26) is made of a silica gel material, so that the sensing portion (2) can be deformed adaptively according to the human structure when the self-powered human sitting posture monitoring cushion is subjected to external pressure.
4. A self-powered human sitting posture monitoring back cushion according to claim 1, wherein the sensing portion (2) is provided with an upper friction layer (24), a paper folding structure layer (23), a lower friction layer (25), a flexible electrode layer (22), a supporting base (26) and a conductive wire (21) from top to bottom in sequence, and the alignment of the center of the top view is ensured during assembly.
5. A self-powered human sitting posture monitoring back cushion as claimed in claim 1 or 4, wherein the lower friction layer substrate (251) and the frustum-shaped protruding structure (252) of the sensing part (2) are molded by silicone and integrated molding.
6. A self-powered human sitting posture monitoring cushion as claimed in claim 1 or 4, wherein the upper surface of the lower friction layer (25) is designed with a prismoid-like convex structure (252) which can generate larger area change under the action of pressure, thereby increasing the triboelectric charge density and enhancing the triboelectric effect.
7. A self-powered human seating posture monitoring cushion as claimed in claim 1 or 4, wherein the paper folding structure layer (23) of the sensing portion (2) is made of PTFE, the upper friction layer (24) is made of nylon material, and the two parts are bonded by glue.
8. A self-powered human sitting posture monitoring back cushion according to claim 1 or 4, wherein the paper folding structure layer (23) connects the lower friction layer (25) and the upper friction layer (24) to make the whole body more adaptive, and the friction effect layer is not in direct contact with the human body, so as to avoid the difference of electric signals caused by human sweat and the like.
9. A self-powered human sitting posture monitoring back cushion as claimed in claim 1 or 4, wherein said flexible electrode layer (22) is a graphene flexible electrode and is made by a screen printing process.
10. A self-powered human sitting posture monitoring back cushion according to claim 1 or 4, wherein said supporting base (26) has a cylindrical through hole in the center, and an electric conducting wire (21) is arranged inside the cylindrical through hole to connect the flexible electrode layer (22) with the signal processing module (14).
11. A self-powered human sitting posture monitoring back cushion as claimed in claim 1, wherein the electrical signals detected by the sensing part (2) are inputted into the signal processing module (14) through the conductive wire (21) and then transmitted to the external terminal through the communication module (15).
12. A self-powered human sitting posture monitoring back cushion as claimed in claim 1, wherein the self-powered sensing part (2) is designed by using the principle of a friction nano-generator without an external power supply for supplying power to the sensing module, thereby reducing the structural complexity, enhancing the safety of use and having environmental friendliness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110794968.6A CN113509023A (en) | 2021-07-14 | 2021-07-14 | Self-powered human body sitting posture monitoring back cushion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110794968.6A CN113509023A (en) | 2021-07-14 | 2021-07-14 | Self-powered human body sitting posture monitoring back cushion |
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| Publication Number | Publication Date |
|---|---|
| CN113509023A true CN113509023A (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110794968.6A Pending CN113509023A (en) | 2021-07-14 | 2021-07-14 | Self-powered human body sitting posture monitoring back cushion |
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| CN107329436A (en) * | 2017-08-10 | 2017-11-07 | 苏州大学 | Flexible touch sensation sensor and robotic handling systems |
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2021
- 2021-07-14 CN CN202110794968.6A patent/CN113509023A/en active Pending
Patent Citations (10)
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| CN102749158A (en) * | 2012-04-13 | 2012-10-24 | 纳米新能源（唐山）有限责任公司 | Self-powered pressure sensor |
| WO2014198155A1 (en) * | 2013-06-13 | 2014-12-18 | 国家纳米科学中心 | Single-electrode friction nano generator, power generation method and self-driven tracker |
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| CN112472436A (en) * | 2020-12-09 | 2021-03-12 | 重庆大学 | Wheelchair for monitoring sitting posture abnormality and emergency control of patient |
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