CN207619571U - A kind of pressure drag fiber, yarn and piezoresistance sensor and fabric - Google Patents
A kind of pressure drag fiber, yarn and piezoresistance sensor and fabric Download PDFInfo
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- CN207619571U CN207619571U CN201720762623.1U CN201720762623U CN207619571U CN 207619571 U CN207619571 U CN 207619571U CN 201720762623 U CN201720762623 U CN 201720762623U CN 207619571 U CN207619571 U CN 207619571U
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Abstract
The utility model discloses a kind of pressure drag fiber, yarns, piezoresistance sensor and fabric with piezoresistance sensor, the wherein described pressure drag fiber, include the outer layer of non-conductive core and the package non-conductive core, the outer layer is made of the thermoplastic polymer containing carbon series conductive particle, and the outer layer is conductive layer；The inner core is made of thermoplastic polymer, which is non-conductive layer.A kind of pressure drag fiber, yarn and piezoresistance sensor and fabric provided by the utility model, accuracy of detection is high, and body-sensing comfort level is strong, and service life is long, and low cost is easy to spread.
Description
Technical field
The utility model is related to sensor fields, more particularly, to a kind of pressure drag fiber, yarn and piezoresistance sensor and knit
Object.
Background technology
With the raising of human living standard, people also rise the attention rate of health therewith, for daily action, movement
Even sleeping posture made higher requirement, and there is an urgent need to understand whether personal trip posture, movement technique etc. have
Either human synovial etc. is adversely affected conducive to health is promoted.As the development of textile technology and people are lived
Horizontal raising, textile gradually develop to functionalization and intelligent direction.Especially Intelligent Exectronic Textiles have merged weaving
The multi-disciplinary technology of technology, electronic technology, computer technology, make textile have to it is extraneous perceive and the function of reaction for this purpose,
Various types of monitoring systems are had devised in shoes, insole, socks and clothes in the prior art, for guarder
The various physiological parameters of body.
It is exactly sensor to the most important component of the detection of these physiological parameters, there are some products to sew on the fabric
Some fabric sensors, the data such as pressure generated when for detecting human motion, but existing sew in clothing such as socks
Fabric sensor on son can make the part for occurring obviously increasing sensor on the clothings such as socks obviously be thicker than other parts
Problem causes the body-sensing of people poor, while existing fabric sensor accuracy of detection is relatively low, short life, and cost is high, causes in this way
The problem of this technology can not be widely applied occurs.Existing fabric sensor can not all pass through shape of Tradition Looms
At needing multistep process to process and original machine is transformed, considerably increase the cost of product and manufacture complexity.While by
It is that multilayer or multi-section are grouped as in flexible fabric sensor, greatly reduces the comfort of end product and noninductive degree.
The purpose of this utility model is to provide a kind of pressure drag fiber, yarn and piezoresistance sensor and fabric, and accuracy of detection is high,
Body-sensing comfort level is strong, and service life is long, and low cost is easy to spread.
Utility model content
To realize the purpose of the utility model, it is achieved using following technical scheme：
A kind of pressure drag fiber, including inner core and the package interior outer layer, wherein：The outer layer is piezoresistance layer, the inner core
For non-conductive inner core.
The pressure drag fiber, wherein：The outer layer is made of the thermoplastic polymer containing carbon series conductive particle, described
Inner core is made of thermoplastic polymer.
A kind of pressure drag yarn, the pressure drag yarn are made of more pressure drag fibers, are twisted mutually between the more pressure drag fibers
It closes；Or the pressure drag yarn includes more pressure drag fibers and the non-conductive fibers of Duo Gen, the more pressure drag fibers and Duo Gen are not led
It is twisted together mutually between electric fiber, it is characterised in that：The pressure drag fiber as above one of described in pressure drag fiber.
The pressure drag yarn, wherein：When the pressure drag yarn includes more pressure drag fibers and the non-conductive fibers of Duo Gen,
In pressure drag yarn, the weight percent that pressure drag fiber accounts for pressure drag yarn is greater than or equal to 60%.
The pressure drag yarn, wherein：When the pressure drag yarn includes more pressure drag fibers and the non-conductive fibers of Duo Gen,
In pressure drag yarn, pressure drag fiber is identical as the hole count of non-conductive fiber.
A kind of piezoresistance sensor, including sensor body and electrode, the piezoresistance sensor are wovens, which passes
Sensor is formed by sensor body and electrode one weaving, the sensor body by pressure drag yarn weaving, the electrode
It is weaved by conductive yarn, wherein：The pressure drag yarn be as above one of described in pressure drag yarn.
The piezoresistance sensor, wherein：The sensor body is contacted with each other with two electrodes respectively.
The piezoresistance sensor, wherein：The shape of the sensor body includes square, rectangle, circle or does not advise
Then figure.
A kind of woven with piezoresistance sensor, including piezoresistance sensor and fabric body, the piezoresistance sensor
With fabric body one weaving, wherein the piezoresistance sensor be as above one of described in piezoresistance sensor, fabric body
It is made by non-conductive yarn.
The woven, wherein：Most of region of the piezoresistance sensor or whole region are all by fabric body
It surrounds.
Description of the drawings
Fig. 1 is the utility model pressure drag yarn texture schematic diagram；
Fig. 2 is the utility model pressure drag resistive thread with pressure change schematic diagram；
Fig. 3 is pressure drag variation principle schematic；
Fig. 4 is the utility model pressure drag resistive thread with pressure change principle schematic；
Fig. 5 is the utility model pressure drag fabric construction schematic diagram；
Fig. 6 is the utility model pressure drag yarn double feature cross-section schematic diagram.
Specific implementation mode
As shown in Figure 1, the utility model pressure drag yarn includes more pressure drag fibers, single pressure drag fiber for forming yarn is former
The cross section of silk is double-layer structure (as shown in Figure 6), and outer layer is made of the thermoplastic polymer containing carbon series conductive particle, inner core
It is made of thermoplastic polymer, outer layer covers inner core, outer layer is piezoresistance layer.The pressure that pressure drag yarn is formed by more after spinning
Resistance fiber merges twisting and forms.Due to inner core and cortex, so the utility model pressure drag fiber is also known as core-skin type pressure drag
Fiber.In the pressure drag fiber, the weight of pressure drag outer layer accounts for the 5-20% of pressure drag total weight of fiber.Inner core weight accounts for pressure drag fibre
Tie up the 80-95% of total weight.
Pressure drag fiber is when making, by the thermoplastic polymer and carbon series conductive particle (such as carbon black particle, carbon nanometer
Pipe etc.) and thermoplastic polymer heated in screw rod or grate or crucible and melt be made, by the thermoplastic polyester
It is prepared into uniform melt by single screw extrusion machine, two obtained kind melt enters compound extruded by respective transfer pipeline
Component is independently distributed and is conveyed by the respective runner of component internal melt, met in compound extruded component template exit multiple
It is squeezed out from the extrusion micropore in template after conjunction；It is round or abnormity to squeeze out micropore, by the melt for squeezing out micropore and squeezing out in template
Thread forms threadiness after the cooled region cooling by a segment length.Obtained fiber is carried out with the speed of 1~800m/min
Winding forms conjugate fiber package.
Since carbon series conductive particle is uniformly dispersed limitation in monofilament in thermoplastic polymer, conducting particles
Discontinuously, part monofilament can not form effective electric conductor, when on the direction of the length of pressure drag yarn to yarn implement
When pressure, multifilament contacts with each other in yarn, forms the smaller multifilament conductor of the larger resistance in cross section, part in compression yarn electricity
Resistance resistance reduction with the increase of pressure, the variation of overall electrical resistance change rate>=10%.
The utility model pressure drag yarn can be carried out the phenomenon that resistance variations due to compression with following formula schematical
It explains：
R=PL/S
Wherein R is conductor resistance, and P is conductor resistance rate, and L is conductor length, and S is conductor cross-sectional area.
As shown in Fig. 2, for same root pressure drag yarn, its resistance value is detected when nature at which, later
In the pressure for applying vertical direction as shown by the arrows in figure 2 to the pressure drag yarn, resistive thread value is detected, it can be found that whole yarn
Resistance is since pressure at right angle stress overall electrical resistance is relative to resistance value reduction under natural conditions.
As shown in figure 3, the core of the utility model core-skin type pressure drag fiber and skin zone are all made of thermoplastic polymer,
By taking nylon 6 as an example.Nylon 6 itself has good elastic nature, so when mutually being squeezed due to pressure at right angle between long filament,
Core and skin zone can deform on cross section so that the carbon black conductive carbochain of skin zone has more chances to contact, and leads to electricity
Resistance reduces, while as the increase entirety resistive thread of pressure at right angle and pressure are negatively correlated variation.The inner core of pressure drag fiber and
Thermoplastic polymer used in outer layer is selected from：Polythene PE, polypropylene PP, polystyrene PS, polymethyl methacrylate
PMMA, nylon Nylon, polycarbonate, thermoplastic, polymeric materials used in inner core and outer layer can it is identical can not also
Together.
In the utility model, the outer layer of pressure drag fiber is piezoresistance layer, the preferred content of conductive carbon system particle contained by this layer
For 10~40% (weight percent, i.e. weight ratio between carbon system particle and piezoresistance layer).Carbon black fine particle fully divide by particle shape
Dissipate when, general electric conductivity is insufficient, when the increase of carbon black fine particle density to a certain extent when, carbon black particle can be in the form of chemical bond
It is combined together to form chain columnar structure, then electric conductivity improves.Experiments verify that the resistivity of carbon black is by between carbon black chain and chain
Distance determine, between these gaps force carbochain under external pressure distance be less than 1nm when, can be formed in local gap
High electric field, under sufficiently large potential difference effect, electronics passes through potential barrier to generate electron tunneling effect, and external pressure is bigger, conductive
Carbon black chain partial amt close to each other in layer will improve, to which the whole resistance by pressure few fibers can be pressed with outside
The promotion of power and reduce.Therefore, make in conducting polymer using conductive carbon black particle, not destroying above structure makes charcoal
Black particle disperses just to become extremely important in the polymer.Therefore, the chain of carbon black fine particle is longer and polymer present in charcoal
The density of black particle is higher, and contact probability is bigger, and resistivity is smaller, and electrical conductance is higher.
In addition, the cortex of the utility model core-skin type pressure drag fiber is formed by carbon black and thermoplastic polymer master batch, master batch
It itself is mixed into carbon black, therefore the thermoplastic polymer medium with elastic characteristic is provided with piezoresistive characteristic, when pressure acts on
When on master batch, whole master batch resistance is due to carbon black conductive chain distance reduction in cortex, whole master batch resistivity reduction.Due to yarn
Line cortex has identical structure master batch to be formed, and when by stress variation, pressure drag fiber surface resistivity is reduced.
Pressure drag measure of the change is being carried out it was found that, when in wet environment, such as in the pressure drag yarn to the utility model
When yarn makes moist accidentally, when not applying pressure, the resistance of pressure drag yarn is compared to the pressure drag yarn under dry environment
Resistance become smaller very much, while to this make moist pressure drag yarn apply pressure when, the variation degree of resistance is not fairly obvious,
The analysis found that through moisture under environment hydrone intervention, cause pressure drag yarn the case where resistance drastically declines occur,
This cause not detecting in wet condition pressure drag resistive thread significant change when pressure as a result, leading to the pressure thus constituted
Resistance sensor can not provide satisfied detection signal.In order to solve this problem, it when manufacturing pressure drag yarn, needs to press at more
More non-conductive fibers are further added except resistance fiber, by the more pressure drag fibers and more non-conductive fibers (such as terylene
Or the non-conductive fiber such as polyamide fibre) merging twisting into pressure drag yarn, the pressure drag yarn manufactured in this way is in moist ring
In border, measuring resistance value has larger difference in its natural state and in the state of being under pressure, resistance under natural conditions
Value is at least 3 times of the resistance value under pressured state.And by increasing ratio of the carbon black particle in pressure drag yarn pressure drag outer layer
Example reduces the resistance of entire piezoresistance sensor to widen the gap with the resistance of wet skin, to reduce due to moist skin
Influence for sensing data.
Experiment sample is described below by concrete case.
Piezoresistive is tested：Bottom surface weight similar with sensor area is additional on a sensor, by changing weight
Quality size tests the resistance variations of sensor.The matching in pressure drag yarn to pressure drag fiber in pressure drag yarn and non-conductive fiber
It is studied than situation.Experimental data is found, in the case where total thread density is constant, the pressure drag increased in pressure drag yarn is fine
The proportioning of dimension can effectively promote maximum pressure induction and the sensor resistance maximum difference of sensor.When pressure drag fibre furnish carries
It is high to a certain extent when, the functional promotion of sensor starts to tend towards stability.It is found by data comparison, it is contemplated that cost etc. is comprehensive
The influence of factor, in pressure drag yarn, when the weight percent that pressure drag fiber accounts for pressure drag yarn is greater than or equal to 60%, sensors
It can be excellent.
Further, the influence for pressure drag yarn totality hole count for sensor function is studied.When pressure drag yarn
The hole count of line is promoted, and the degrees of fusion of pressure drag fiber and non-conductive fiber can more uniformly in pressure drag yarn.It is obtained by experimental data
Know, when overall yarn hole count is promoted, the induction of sensor maximum pressure and sensor maximum resistance difference have promotion, effectively
Improve the susceptibility and performance of sensor.Pressure drag yarn entirety hole count can be between 25f-70f, preferably 60f, it is preferred that
In pressure drag yarn, pressure drag fiber is identical as the hole count of non-conductive fiber.
The utility model additionally provides a kind of piezoresistance sensor, and the piezoresistance sensor includes sensor body and electrode,
The piezoresistance sensor is also woven, by sensor body and electrode one weaving.The sensor body is by this
Pressure drag fiber weaving in utility model above-described embodiment forms, and shape can make square, rectangle, circle, irregular component
Shape etc.；The electrode is weaved by conductive yarn, and the conductive yarn selects the conductive yam that specific resistance is less than 10^2 ohm/cm
Line can be plating silver yarn, copper facing yarn, gold-plated yarn etc..As shown in figure 5, the woven with piezoresistance sensor includes
Piezoresistance sensor and fabric body 2, the piezoresistance sensor and the integrated weaving of fabric body 2, fabric body 2 is by non-conductive
Yarn is made into.Most of region of the piezoresistance sensor ontology 1 or whole region are all surrounded by fabric body 2.In figure, one
Sensor body 1 is contacted with each other with two electrodes 3 respectively, to which when sensor body stress, resistance variations can be by electrode
Acquisition.Described two electrodes are not directly contacted with mutually.The electrode 3 (can scheme with two interfaces in center electron module respectively
In be not shown) be connected, one of them be power supply (Vcc) interface.Center electron module includes wireless transmission or wire transmission mould
Block (USB (wired module), bluetooth, WiFi, ZigBee or radio frequency.Center electron module can storage sensors resistance variations
Data, data can be carried out by transmission module in real time or the modes such as active synchronization are transferred to mobile phone, tablet, and the equipment such as PC are into traveling
One step calculation processing.
Claims (9)
1. a kind of pressure drag fiber, including inner core and the outer layer for wrapping up the inner core, it is characterised in that：The outer layer is piezoresistance layer, institute
It is non-conductive inner core to state inner core, wherein the outer layer is made of the thermoplastic polymer containing carbon series conductive particle, the inner core
It is made of thermoplastic polymer.
2. a kind of pressure drag yarn, which is made of more pressure drag fibers, is twisted together mutually between the more pressure drag fibers；
Or the pressure drag yarn includes more pressure drag fibers and the non-conductive fibers of Duo Gen, the more pressure drag fibers and the non-conductive fibres of Duo Gen
It is twisted together mutually between dimension, it is characterised in that：The pressure drag fiber is pressure drag fiber described in claim 1.
3. pressure drag yarn according to claim 2, it is characterised in that：When the pressure drag yarn include more pressure drag fibers and
When more non-conductive fibers, in pressure drag yarn, the weight percent that pressure drag fiber accounts for pressure drag yarn is greater than or equal to 60%.
4. pressure drag yarn according to claim 2, it is characterised in that：When the pressure drag yarn include more pressure drag fibers and
When more non-conductive fibers, in pressure drag yarn, pressure drag fiber is identical as the hole count of non-conductive fiber.
5. a kind of piezoresistance sensor, including sensor body and electrode, the piezoresistance sensor are wovens, pressure drag sensing
Device is formed by sensor body and electrode one weaving, the sensor body by pressure drag yarn weaving, the electrode by
Conductive yarn is weaved, it is characterised in that：The pressure drag yarn is the pressure drag yarn described in one of claim 2-4.
6. piezoresistance sensor according to claim 5, it is characterised in that：The sensor body is mutual with two electrodes respectively
It is in contact.
7. piezoresistance sensor according to claim 5, it is characterised in that：The shape of the sensor body includes pros
Shape, rectangle, circle or irregular figure.
8. a kind of woven with piezoresistance sensor, including piezoresistance sensor and fabric body, the piezoresistance sensor and
Fabric body one weaving, it is characterised in that the piezoresistance sensor is the pressure drag sensing described in one of claim 5-7
Device, fabric body are made by non-conductive yarn.
9. woven according to claim 8, it is characterised in that：Most of region of the piezoresistance sensor or whole
Region is all surrounded by fabric body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720762623.1U CN207619571U (en) | 2017-06-28 | 2017-06-28 | A kind of pressure drag fiber, yarn and piezoresistance sensor and fabric |
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|---|---|---|---|
| CN201720762623.1U CN207619571U (en) | 2017-06-28 | 2017-06-28 | A kind of pressure drag fiber, yarn and piezoresistance sensor and fabric |
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ID=62818813
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107142554A (en) * | 2017-06-28 | 2017-09-08 | 棉联（北京）网络科技有限公司 | A kind of pressure drag fiber, yarn and piezoresistance sensor and fabric |
| CN109781315A (en) * | 2019-02-02 | 2019-05-21 | 五邑大学 | A kind of novel touch sensor |
| CN111227812A (en) * | 2020-01-16 | 2020-06-05 | 武汉纺织大学 | All-fiber-based flexible sensor and preparation method and application thereof |
| CN112161738A (en) * | 2020-09-17 | 2021-01-01 | 五邑大学 | Air pressure sensor and manufacturing method thereof |
-
2017
- 2017-06-28 CN CN201720762623.1U patent/CN207619571U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107142554A (en) * | 2017-06-28 | 2017-09-08 | 棉联（北京）网络科技有限公司 | A kind of pressure drag fiber, yarn and piezoresistance sensor and fabric |
| CN107142554B (en) * | 2017-06-28 | 2023-08-08 | 棉联（北京）网络科技有限公司 | Piezoresistive fiber, yarn, piezoresistive sensor and fabric |
| CN109781315A (en) * | 2019-02-02 | 2019-05-21 | 五邑大学 | A kind of novel touch sensor |
| WO2020155193A1 (en) * | 2019-02-02 | 2020-08-06 | 五邑大学 | Novel tactile sensor |
| US11313743B2 (en) | 2019-02-02 | 2022-04-26 | Wuyi University | Tactile sensor |
| CN111227812A (en) * | 2020-01-16 | 2020-06-05 | 武汉纺织大学 | All-fiber-based flexible sensor and preparation method and application thereof |
| CN111227812B (en) * | 2020-01-16 | 2022-10-11 | 武汉纺织大学 | All-fiber-based flexible sensor and preparation method and application thereof |
| CN112161738A (en) * | 2020-09-17 | 2021-01-01 | 五邑大学 | Air pressure sensor and manufacturing method thereof |
| CN112161738B (en) * | 2020-09-17 | 2022-04-08 | 五邑大学 | Air pressure sensor and manufacturing method thereof |
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