CN110514331A - Highly sensitive, big elongation strain sensor and its application based on auxetic structure - Google Patents
Highly sensitive, big elongation strain sensor and its application based on auxetic structure Download PDFInfo
- Publication number
- CN110514331A CN110514331A CN201910746851.3A CN201910746851A CN110514331A CN 110514331 A CN110514331 A CN 110514331A CN 201910746851 A CN201910746851 A CN 201910746851A CN 110514331 A CN110514331 A CN 110514331A
- Authority
- CN
- China
- Prior art keywords
- auxetic structure
- highly sensitive
- strain sensor
- elongation strain
- thermoplastic elastomer
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/18—Measuring force or stress, in general using properties of piezo-resistive materials, i.e. materials of which the ohmic resistance varies according to changes in magnitude or direction of force applied to the material
Abstract
Highly sensitive, the big elongation strain sensor that the invention discloses a kind of based on auxetic structure and its in the application in mans motion simulation monitors.The strain transducer includes the flexible base material for being affixed on elastomeric dielectric material film side, and flexible base material is connect with elastomeric dielectric material film by active conductive network；The flexible base material is elastic auxetic structure, when so that the strain transducer is by longitudinal stretching, lateral expansion；When by cross directional stretch, longitudinal dilatation.The present invention by expansion so that being separated from each other for active material and generate sensitive signal, be negative poisson effect, negative poisson's ratio sensor is in longitudinal stretching, laterally expand, improve sensitivity, the fields such as wearable device, software robot, Internet of Things, medical rehabilitation training and motor behavior monitoring can be preferably applied to, and play key effect.
Description
Technical field
Highly sensitive, the big elongation strain sensor and its application that the present invention relates to a kind of based on auxetic structure, belong to spinning
Knit material and technical field.
Background technique
Stretchable strain transducer plays key effect in fields such as wearable device, software robot and Internet of Things, but
These carry out subtle strain detecting using needs under various strains, suffer from the limitation of muting sensitivity.It is this insufficient
Sensibility from traditional strain transducer poisson effect.Resistance strain sensor is usually by electrode active materials, film
Elastomer matrix or matrix composition.In order to solve the challenge of sensitivity, most research all concentrates on changing and optimizing activity
On material, but achievable sensitivity is still limited.Sensibility is insufficient the reason is that film in traditional strain transducer
Elastomer bears lateral Poisson compression under stretch.Under the microscope, the sensitivity of strain transducer depends on electrical conductive activities material
The separation degree of material.Expansion is located remotely from each other active material, and signal is made to become sensitive, and phase can be generated by compressing extruding active material
Anti- reaction.Traditional film elastic is as incompressible material, Poisson's ratio 0.5.It is longitudinal swollen under stretching action
It is swollen, transverse compression.Therefore sensitivity caused by longitudinal stretching is compressed by lateral Poisson offsets, this limits sensitive in itself
Degree.Therefore, how adjusting and reducing lateral Poisson compression is to improve the critical issue of sensitivity.
Summary of the invention
The technical problems to be solved by the present invention are: traditional strain transducer is when stretching, draw direction expands and section
Direction is shunk, and the problem that the sensitive material tensile deformation of sensitive signal is small, sensitivity is low is caused, and the present invention is obtained by structure design
The strain transducer that draw direction expansion, cross-wise direction also expand when obtaining tensile deformation, so that active conductive material be allowed to generate
Sensitive signal has highly sensitive and large deformation.
To solve the above-mentioned problems, the present invention provides a kind of, and highly sensitive, the big elongation strain based on auxetic structure passes
Sensor, which is characterized in that the flexible base material including being affixed on elastomeric dielectric material film side, flexible base material and elasticity
Dielectric material film passes through active conductive network connection；The flexible base material is elastic auxetic structure, so that the strain passes
When sensor is by longitudinal stretching, lateral expansion；When by cross directional stretch, longitudinal dilatation.The strain transducer is using elastic auxetic structure
Frame has in longitudinal stretching, laterally expands, so that it is conductive to improve the activity for generating sensitive signal by expansion characteristics
Material.
Preferably, the planar graph of the elastic auxetic structure is indent hexagon cellular, double-head arrow type, herringbone, star
Network, indent diamond shape, regular dodecahedron, triangle grid, center rotation rectangle, center rotary triangle shape, center rotation tetrahedron,
Chiral honeycomb, center polygonal, hinged hexagon, articulated quadrilateral, hinged triangle or more than one aforementioned combination
Figure.
Preferably, the material of the elastic auxetic structure is hydrogel, dimethyl silicone polymer, poly terephthalic acid second two
Ester, rubber material, polyimides, polyurethane-type thermoplastic elastomer, polyamide-type thermoplastic elastomer, polyolefins thermoplastic
Elastomer, polyethylene or styrene analog thermoplastic elastomer.The material has highly sensitive, big elongation strain, can accurately pass
Up to signal, the raising of the sensitivity is to concentrate collaboration to realize by reducing Poisson ratio and stress, and big elongation strain passes through
Adjust the structural parameters realization of elastic auxetic structure frame.
Preferably, the elastic auxetic structure is generated using 3D printing technique.
It is highly preferred that the 3D printing technique is FDM melt-laminated molding technology or SLA photocuring printing technique, it can be with
Realize the fineness of auxetic structure body and the fine adjustment of length.
Preferably, the elastomeric dielectric material film is led using chemical structure design, addition inorganic nano-particle or filling
Electric material is made, or is made of printing.
It is highly preferred that the inorganic nano-particle is conductive filler, conducting polymer or carbon nanotube (such as titanium dioxide
Titanium, ferroelectric nano particle barium titanate, metal nanoparticle)；Printing raw material are hydrogel, dimethyl silicone polymer, gather to benzene
Dioctyl phthalate second diester, rubber material, polyimides, polyurethane-type thermoplastic elastomer, polyamide-type thermoplastic elastomer, polyene
Hydrocarbon thermoplastic's elastomer, polyethylene or styrene analog thermoplastic elastomer.
Preferably, the active conductive network is material, the high resiliency conducing composite material itself with highly conductive function
Or piezoelectric material, such as carbon nanotube based active material, graphene-based active material, elastic composite structures active material etc..
Preferably, the active conductive network includes conductive layer, and the both ends of conductive layer are respectively source electrode, drain electrode, source electrode, leakage
It is respectively equipped with source pole metal lines, drain metal lines on extremely, the metal wire for connecting output equipment is also connected on source electrode；It is conductive
Equipped with grid metal lines, it can be achieved that the adjusting of signal-to-noise ratio, improves the sensitivity of sensor on layer.
The present invention also provides above-mentioned highly sensitive, the big elongation strain sensor based on auxetic structure human motion with
Application in track monitoring.The present invention, can be to human synovial for fields such as human motion monitoring, Health restoration and human-computer interactions
Tracking and monitoring is carried out with muscular movement, corresponding induction can also be made to beat pulse, throat sounding, micro- expression etc..This hair
It is bright to be preferably applied to the necks such as wearable device, software robot, Internet of Things, medical rehabilitation training and motor behavior monitoring
Domain, especially detects the sensor of human body large deformation, and plays key effect.The invention, which is applied, can diagnose damage in neck
Hurt vocal cords, deaf, laryngocarcinoma；It can assist to tremble at wrist to detect epilepsy and parkinsonism etc..
The principle of the invention lies in the elastic auxetic structure frames that will be generated by 3D printing technique as flexible substrates
Material is placed on elastomeric dielectric material film, and the two is fixed up by active conductive network.Under the conditions of wearable
Human body large deformation sensing detection, since traditional strain transducer is because of its poisson effect that is positive, in longitudinal stretching, laterally squeeze
Contracting, so that the transverse direction of active material, which squeezes contracting, counteracts longitudinal dilatation, to limit its sensitivity.The present invention selects negative poisson's ratio knot
The sensor of structure base is laterally expanded in longitudinal stretching, just solves the problems, such as this.Can preferably be applied to can wear
The fields such as equipment, software robot, Internet of Things, medical rehabilitation training and motor behavior monitoring are worn, and play key effect.
Negative poisson's ratio sensor is laterally expanded in longitudinal stretching, and two-way expansion just solves the problems, such as this.It is real
Test the result shows that, the elongation strain sensor of this negative poisson's ratio structure preparation can significantly improve the sensitivity of sensor.With
Traditional sensors are compared, and sensitivity greatly improves.The raising of this sensitivity is to concentrate collaboration by reducing Poisson ratio and strain
Effect and realize.Mechanical Meta Materials are applied to wider stretchable electronic material library and have paved road by it.
Compared with prior art, the beneficial effects of the invention are that:
(1) sensor of present invention selection negative poisson's ratio structure base laterally expands, just when having longitudinal stretching
Solve by expansion so that being separated from each other for active material and generate the high sensitivity and large deformation problem of sensitive signal, solve
Traditional strain gauge tensile deformation is small, the low problem of sensitivity, and it is stretchable to improve to illustrate a kind of completely new strategy
The sensitivity of strain transducer；
(2) production method of the present invention is varied, and simple process and low cost is environmentally friendly；
(3) structure of the invention multiplicity, and can be according to using purpose different, using the matrix of different units structure snd size
Structure；
(4) scope of application and purposes of the present invention are wide；
(5) resistance type sensor of the present invention, reusable, precision is good and reproducible, and structure is simple.
Detailed description of the invention
Fig. 1,2 for indent hexagon base structure strain transducer different angle schematic diagram；
Fig. 3 is the schematic diagram of active conductive network.
Specific embodiment
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
Embodiment
As shown in Figure 1-3, for a kind of highly sensitive, big elongation strain sensing based on auxetic structure provided by the invention
Device comprising be affixed on the flexible base material 1 of 3 side of elastomeric dielectric material film, flexible base material 1 and elastomeric dielectric material
Film 3 passes through active conductive network 2 and connects；The flexible base material 1 is elastic auxetic structure so that the strain transducer by
When longitudinal stretching, lateral expansion；When by cross directional stretch, longitudinal dilatation.
The planar graph of the elasticity auxetic structure is indent hexagon cellular, double-head arrow type, herringbone, star network, interior
Recessed diamond shape, regular dodecahedron, triangle grid, center rotation rectangle, center rotary triangle shape, center rotation tetrahedron, chiral bee
Nest, center polygonal, hinged hexagon, articulated quadrilateral, hinged triangle or more than one aforementioned composite figure.Bullet
Property auxetic structure material be hydrogel, dimethyl silicone polymer, polyethylene terephthalate, rubber material, polyimides,
Polyurethane-type thermoplastic elastomer, polyamide-type thermoplastic elastomer, polyolefins thermoplastic elastomer, polyethylene or styrene
Analog thermoplastic elastomer.
The elasticity auxetic structure is generated using 3D printing technique.The 3D printing technique is that FDM fusion stacking forms skill
Art or SLA photocuring printing technique.
The elastomeric dielectric material film 1 is using chemical structure design, addition inorganic nano-particle or filling conductive material
It is made, or is made of printing.The inorganic nano-particle is conductive filler, conducting polymer or carbon nanotube；Printing
Raw material are hydrogel, dimethyl silicone polymer, polyethylene terephthalate, rubber material, polyimides, polyurethanes heat
Thermoplastic elastic, polyamide-type thermoplastic elastomer, polyolefins thermoplastic elastomer, polyethylene or styrene analog thermoplastic bullet
Property body.
The activity conductive network 2 is material, high resiliency conducing composite material or the piezoelectricity itself with highly conductive function
Material comprising conductive layer 21, the both ends of conductive layer 21 are respectively source electrode 22, drain electrode 24, are respectively equipped on source electrode 22, drain electrode 24
Source pole metal lines 23, drain metal lines 25 are also connected with the metal wire 26 for connecting output equipment on source electrode 22；Conductive layer 21
It is upper that grid metal lines 27 are housed.
The planar graph of elastic auxetic structure is indent hexagon in the present embodiment；Flexible base material 1 is to lead to more 3D to beat
Print technology prints PDMS；Active conductive network 2 uses single-walled carbon nanotube (SWCNT) conductive network；Elastomeric dielectric material
Expect that film 3 is PDMS film made of 3D printing.
The strain sensing process of above-mentioned strain transducer is as follows:
During stretching, micro-crack is generated and is propagated in the SWCNT network of single-walled carbon nanotube (SWCNT), is blocked
Other smooth electronics accesses, change resistance.Therefore, can under 15% nominal elongation strain by measurement coefficient significantly
835 are increased to, improves 24 times than traditional sensors.The raising of this sensibility is the reduction and strain due to structure Poisson's ratio
Caused by the collective effect of concentration.As a kind of potential mechanism, micro-crack is elongated by auxiliary Meta Materials, and the above results are by sweeping
It retouches electron microscope (SEM) image and numerical simulation discloses.
Claims (10)
1. a kind of highly sensitive, big elongation strain sensor based on auxetic structure, which is characterized in that including being affixed on elastomeric dielectric
The flexible base material (1) of material film (3) side, flexible base material (1) and elastomeric dielectric material film (3) pass through activity
Conductive network (2) connection；The flexible base material (1) is elastic auxetic structure, so that the strain transducer is by longitudinal stretching
When, lateral expansion；When by cross directional stretch, longitudinal dilatation.
2. highly sensitive, the big elongation strain sensor based on auxetic structure as described in claim 1, which is characterized in that institute
The planar graph for stating elastic auxetic structure is indent hexagon cellular, double-head arrow type, herringbone, star network, indent diamond shape, positive ten
Dihedron, triangle grid, center rotation rectangle, center rotary triangle shape, center rotation tetrahedron, chiral honeycomb, center rotation
Polyhedron, hinged hexagon, articulated quadrilateral, hinged triangle or more than one aforementioned composite figure.
3. highly sensitive, the big elongation strain sensor based on auxetic structure as described in claim 1, which is characterized in that institute
The material for stating elastic auxetic structure is hydrogel, dimethyl silicone polymer, polyethylene terephthalate, rubber material, polyamides
Imines, polyurethane-type thermoplastic elastomer, polyamide-type thermoplastic elastomer, polyolefins thermoplastic elastomer, polyethylene or
Styrene analog thermoplastic elastomer.
4. highly sensitive, the big elongation strain sensor based on auxetic structure as described in claim 1, which is characterized in that institute
Elastic auxetic structure is stated to generate using 3D printing technique.
5. highly sensitive, the big elongation strain sensor based on auxetic structure as claimed in claim 4, which is characterized in that institute
Stating 3D printing technique is FDM melt-laminated molding technology or SLA photocuring printing technique.
6. highly sensitive, the big elongation strain sensor based on auxetic structure as described in claim 1, which is characterized in that institute
Elastomeric dielectric material film (1) is stated to be made using chemical structure design, addition inorganic nano-particle or filling conductive material, or
It is made of printing.
7. highly sensitive, the big elongation strain sensor based on auxetic structure as claimed in claim 6, which is characterized in that institute
Stating inorganic nano-particle is conductive filler, conducting polymer or carbon nanotube；Printing raw material are hydrogel, poly dimethyl silicon
Oxygen alkane, polyethylene terephthalate, rubber material, polyimides, polyurethane-type thermoplastic elastomer, polyamide-type thermoplastic
Elastomer, polyolefins thermoplastic elastomer, polyethylene or styrene analog thermoplastic elastomer.
8. highly sensitive, the big elongation strain sensor based on auxetic structure as described in claim 1, which is characterized in that institute
Stating active conductive network (2) is material, high resiliency conducing composite material or the piezoelectric material itself with highly conductive function.
9. highly sensitive, the big elongation strain sensor based on auxetic structure as described in claim 1, which is characterized in that institute
Stating active conductive network (2) includes conductive layer (21), and the both ends of conductive layer (21) are respectively source electrode (22), drain electrode (24), source electrode
(22), source pole metal lines (23), drain metal lines (25) are respectively equipped in drain electrode (24), source electrode is also connected on (22) for connecting
Connect the metal wire (26) of output equipment；Grid metal lines (27) are housed on conductive layer (21).
10. a kind of highly sensitive, big elongation strain sensor described in any one of claim 1-9 based on auxetic structure exists
Application in mans motion simulation monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910746851.3A CN110514331A (en) | 2019-08-14 | 2019-08-14 | Highly sensitive, big elongation strain sensor and its application based on auxetic structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910746851.3A CN110514331A (en) | 2019-08-14 | 2019-08-14 | Highly sensitive, big elongation strain sensor and its application based on auxetic structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110514331A true CN110514331A (en) | 2019-11-29 |
Family
ID=68625809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910746851.3A Pending CN110514331A (en) | 2019-08-14 | 2019-08-14 | Highly sensitive, big elongation strain sensor and its application based on auxetic structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110514331A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682796A (en) * | 2020-05-20 | 2020-09-18 | 武汉汉烯科技有限公司 | Flexible piezoelectric energy collector based on negative Poisson ratio macroscopic graphene film |
| CN112285384A (en) * | 2020-09-17 | 2021-01-29 | 南京高华科技股份有限公司 | Acceleration sensor based on mechanical metamaterial structure |
| CN112432589A (en) * | 2020-11-30 | 2021-03-02 | 中南大学 | Parallel flexible strain sensor and preparation method thereof |
| CN112945431A (en) * | 2021-03-24 | 2021-06-11 | 南开大学 | Conductive porous pressure-sensitive metamaterial with negative Poisson ratio characteristic and preparation method and application thereof |
| CN113074846A (en) * | 2021-03-12 | 2021-07-06 | 电子科技大学 | Micro-channel stress sensor based on structural metamaterial and preparation method thereof |
| CN113074842A (en) * | 2021-04-09 | 2021-07-06 | 浙江大学 | Magnetic flexible touch sensing structure based on folding magnetizing method and application |
| CN113237419A (en) * | 2021-05-14 | 2021-08-10 | 东南大学 | High-sensitivity flexible capacitive strain sensor and preparation method thereof |
| CN113483651A (en) * | 2021-06-18 | 2021-10-08 | 清华大学深圳国际研究生院 | Resistance type flexible tensile strain sensor |
| CN114076564A (en) * | 2020-08-20 | 2022-02-22 | 广州市香港科大霍英东研究院 | Strain sensor array based on negative Poisson ratio structure and preparation method and application thereof |
| CN114413744A (en) * | 2022-03-07 | 2022-04-29 | 西安交通大学 | 3D printing composite material flexible strain sensor based on auxetic structure and preparation method thereof |
| CN114459333A (en) * | 2022-01-26 | 2022-05-10 | 浙江大学 | Tensile strain sensor based on porous flexible material |
| CN114516753A (en) * | 2022-03-02 | 2022-05-20 | 北京工业大学 | Manufacturing method of high piezoelectric coefficient D31 barium titanate ceramic based on 3D printing negative Poisson's ratio structure |
| CN114813846A (en) * | 2022-04-14 | 2022-07-29 | 南京高华科技股份有限公司 | Humidity sensor |
| CN111682796B (en) * | 2020-05-20 | 2024-04-19 | 武汉汉烯科技有限公司 | Flexible piezoelectric energy collector based on negative poisson ratio macroscopic graphene film |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626062A (en) * | 2008-07-11 | 2010-01-13 | 清华大学 | Diode made from organic composite materials |
| CN105738013A (en) * | 2016-02-02 | 2016-07-06 | 上海交通大学 | High-sensitivity pressure sensor and manufacturing method thereof |
| CN106017748A (en) * | 2016-05-19 | 2016-10-12 | 北京印刷学院 | Capacitive flexible pressure sensor based on composite material dielectric layer and preparation method of capacitive flexible pressure sensor |
| WO2016179245A1 (en) * | 2015-05-04 | 2016-11-10 | The Florida State University Research Foundation, Inc. | Negative poisson ratio piezoresistive sensor and method of manufacture |
| CN106950000A (en) * | 2017-03-29 | 2017-07-14 | 深圳大学 | A kind of Pulse pressure sensor, chip, device, system and preparation method thereof |
| CN107268185A (en) * | 2017-06-09 | 2017-10-20 | 东华大学 | A kind of method that blend spinning prepares the flexible auxetic materials of rock-steady structure |
| CN108822548A (en) * | 2018-06-19 | 2018-11-16 | 复旦大学 | A kind of 3D printing graphene-based flexible sensor and preparation method thereof of the stretchable high sensitivity of height |
| CN109580050A (en) * | 2018-12-14 | 2019-04-05 | 电子科技大学 | A kind of flexibility mechanics patterning sensor and preparation method thereof |
-
2019
- 2019-08-14 CN CN201910746851.3A patent/CN110514331A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101626062A (en) * | 2008-07-11 | 2010-01-13 | 清华大学 | Diode made from organic composite materials |
| WO2016179245A1 (en) * | 2015-05-04 | 2016-11-10 | The Florida State University Research Foundation, Inc. | Negative poisson ratio piezoresistive sensor and method of manufacture |
| CN105738013A (en) * | 2016-02-02 | 2016-07-06 | 上海交通大学 | High-sensitivity pressure sensor and manufacturing method thereof |
| CN106017748A (en) * | 2016-05-19 | 2016-10-12 | 北京印刷学院 | Capacitive flexible pressure sensor based on composite material dielectric layer and preparation method of capacitive flexible pressure sensor |
| CN106950000A (en) * | 2017-03-29 | 2017-07-14 | 深圳大学 | A kind of Pulse pressure sensor, chip, device, system and preparation method thereof |
| CN107268185A (en) * | 2017-06-09 | 2017-10-20 | 东华大学 | A kind of method that blend spinning prepares the flexible auxetic materials of rock-steady structure |
| CN108822548A (en) * | 2018-06-19 | 2018-11-16 | 复旦大学 | A kind of 3D printing graphene-based flexible sensor and preparation method thereof of the stretchable high sensitivity of height |
| CN109580050A (en) * | 2018-12-14 | 2019-04-05 | 电子科技大学 | A kind of flexibility mechanics patterning sensor and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| YING JIANG，ZHIYUAN LIU，NAOJI MATSUHISA，ET AL: "Auxetic Mechanical Metamaterials to Enhance Sensitivity of Stretchable Strain Sensors", 《ADVANCED MATERIALS》 * |
| 任鑫，张相玉，谢亿民: "负泊松比材料和结构的研究进展", 《力学学报》 * |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111682796B (en) * | 2020-05-20 | 2024-04-19 | 武汉汉烯科技有限公司 | Flexible piezoelectric energy collector based on negative poisson ratio macroscopic graphene film |
| CN111682796A (en) * | 2020-05-20 | 2020-09-18 | 武汉汉烯科技有限公司 | Flexible piezoelectric energy collector based on negative Poisson ratio macroscopic graphene film |
| CN114076564A (en) * | 2020-08-20 | 2022-02-22 | 广州市香港科大霍英东研究院 | Strain sensor array based on negative Poisson ratio structure and preparation method and application thereof |
| CN114076564B (en) * | 2020-08-20 | 2024-02-20 | 广州市香港科大霍英东研究院 | Strain sensor array based on negative poisson ratio structure and preparation method and application thereof |
| CN112285384A (en) * | 2020-09-17 | 2021-01-29 | 南京高华科技股份有限公司 | Acceleration sensor based on mechanical metamaterial structure |
| CN112432589A (en) * | 2020-11-30 | 2021-03-02 | 中南大学 | Parallel flexible strain sensor and preparation method thereof |
| CN113074846A (en) * | 2021-03-12 | 2021-07-06 | 电子科技大学 | Micro-channel stress sensor based on structural metamaterial and preparation method thereof |
| CN112945431B (en) * | 2021-03-24 | 2022-07-26 | 南开大学 | Conductive porous pressure-sensitive metamaterial with negative Poisson ratio characteristic and preparation method and application thereof |
| CN112945431A (en) * | 2021-03-24 | 2021-06-11 | 南开大学 | Conductive porous pressure-sensitive metamaterial with negative Poisson ratio characteristic and preparation method and application thereof |
| CN113074842A (en) * | 2021-04-09 | 2021-07-06 | 浙江大学 | Magnetic flexible touch sensing structure based on folding magnetizing method and application |
| CN113237419A (en) * | 2021-05-14 | 2021-08-10 | 东南大学 | High-sensitivity flexible capacitive strain sensor and preparation method thereof |
| CN113483651A (en) * | 2021-06-18 | 2021-10-08 | 清华大学深圳国际研究生院 | Resistance type flexible tensile strain sensor |
| CN114459333A (en) * | 2022-01-26 | 2022-05-10 | 浙江大学 | Tensile strain sensor based on porous flexible material |
| CN114516753A (en) * | 2022-03-02 | 2022-05-20 | 北京工业大学 | Manufacturing method of high piezoelectric coefficient D31 barium titanate ceramic based on 3D printing negative Poisson's ratio structure |
| CN114516753B (en) * | 2022-03-02 | 2022-10-28 | 北京工业大学 | Manufacturing method of high-piezoelectric coefficient D31 barium titanate ceramic based on 3D printing negative Poisson's ratio structure |
| CN114413744A (en) * | 2022-03-07 | 2022-04-29 | 西安交通大学 | 3D printing composite material flexible strain sensor based on auxetic structure and preparation method thereof |
| CN114813846A (en) * | 2022-04-14 | 2022-07-29 | 南京高华科技股份有限公司 | Humidity sensor |
| CN114813846B (en) * | 2022-04-14 | 2023-06-27 | 南京高华科技股份有限公司 | Humidity sensor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110514331A (en) | Highly sensitive, big elongation strain sensor and its application based on auxetic structure | |
| Yu et al. | Superior piezoresistive strain sensing behaviors of carbon nanotubes in one-dimensional polymer fiber structure | |
| Qi et al. | Weavable and stretchable piezoresistive carbon nanotubes-embedded nanofiber sensing yarns for highly sensitive and multimodal wearable textile sensor | |
| Zheng et al. | Multifunctional and highly sensitive piezoresistive sensing textile based on a hierarchical architecture | |
| Shen et al. | Progress of flexible strain sensors for physiological signal monitoring | |
| US20240044728A1 (en) | Negative poisson ratio piezoresistive sensor and method of manufacture | |
| Kim et al. | Highly sensitive and very stretchable strain sensor based on a rubbery semiconductor | |
| Yang et al. | Graphene: diversified flexible 2D material for wearable vital signs monitoring | |
| Wei et al. | Flexible piezoresistive sensors based on “dynamic bridging effect” of silver nanowires toward graphene | |
| Tang et al. | Coaxial carbon nanotube/polymer fibers as wearable piezoresistive sensors | |
| Zhou et al. | All-nanofiber network structure for ultrasensitive piezoresistive pressure sensors | |
| Lin et al. | A wearable and highly sensitive capacitive pressure sensor integrated a dual-layer dielectric layer of PDMS microcylinder array and PVDF electrospun fiber | |
| Zhao et al. | 3D-printed highly stable flexible strain sensor based on silver-coated-glass fiber-filled conductive silicon rubber | |
| US10842413B2 (en) | Piezoelectric patch sensor | |
| CN106441073A (en) | Dielectric flexible sensor for big deformation and touch pressure measurement | |
| Lee et al. | Wearable triboelectric strain-insensitive pressure sensors based on hierarchical superposition patterns | |
| JP7244939B2 (en) | Fiber-based composite with fracture-induced mechano-electrical sensitivity | |
| Shi et al. | Highly stretchable and strain sensitive fibers based on braid-like structure and sliver nanowires | |
| Tian et al. | Coating of multi-wall carbon nanotubes (MWCNTs) on three-dimensional, bicomponent nonwovens as wearable and high-performance piezoresistive sensors | |
| Zhong et al. | Piezoresistive design for electronic skin: from fundamental to emerging applications | |
| Nag et al. | Transparent biocompatible sensor patches for touch sensitive prosthetic limbs | |
| Wang et al. | Skin-inspired tactile sensor based on gradient pore structure enable broad range response and ultrahigh pressure resolution | |
| Yang et al. | Mechanical sensors based on two-dimensional materials: Sensing mechanisms, structural designs and wearable applications | |
| Yi et al. | Flexible piezoresistive strain sensor based on CNTs–polymer composites: a brief review | |
| CN109916292B (en) | Preparation method of multilayer capacitive flexible intelligent wearable sensing device |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191129 |
|
| RJ01 | Rejection of invention patent application after publication |