CN116288892A - Full-knitting three-dimensional interval type piezoresistive sensor and knitting method thereof - Google Patents
Full-knitting three-dimensional interval type piezoresistive sensor and knitting method thereof Download PDFInfo
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- 229920001778 nylon Polymers 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 5
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- 229920000728 polyester Polymers 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 4
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/10—Patterned fabrics or articles
- D04B1/102—Patterned fabrics or articles with stitch pattern
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/10—Patterned fabrics or articles
- D04B1/12—Patterned fabrics or articles characterised by thread material
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
- D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
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- 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
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
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- D10B2101/20—Metallic fibres
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- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The invention discloses a fully knitted three-dimensional interval piezoresistive sensor and a knitting method thereof, wherein the sensor comprises: the first conductive yarn layer and the second conductive yarn layer are arranged at intervals; a third conductive yarn layer woven between the first conductive yarn layer and the second conductive yarn layer; the first conductive yarn layer and the second conductive yarn layer are in contact with the third conductive yarn layer to be electrically conducted; the first conductive yarn layer and the second conductive yarn layer each have a resistance less than a resistance of the third conductive yarn layer. In a natural state, the three conductive yarn layers are connected in series, and the resistance of the sensor is mainly the resistance of the third conductive yarn layer. When the interval is reduced or part of direct contact is carried out, the first conductive yarn layer is in contact with the second conductive yarn layer to conduct electricity, the three conductive yarn layers are connected in series and in parallel in a mixed mode, the resistance of the sensor can be reduced, the smaller the interval or the larger the contact area is, the larger the reduction is, the sensitivity of the sensor is higher, the detection range is large, and the accurate measurement of the resistance of the sensor is realized.
Description
Technical Field
The invention relates to the technical field of sensing, in particular to a fully-knitted three-dimensional interval piezoresistive sensor and a knitting method thereof.
Background
The existing knitted-type resistance sensors applicable to wearable devices are mostly divided into two types: firstly, common knitted fabric is used as a substrate, and a conductive layer is plated/coated or a conductive film is coated on the common knitted fabric. And secondly, weaving the conductive yarns and the common yarns into a two-dimensional (/ plane) structure, such as plain weave, rib weave, double-reverse structure and the like, monitoring resistance change through stretching, or combining a two-dimensional conductive knitted fabric into a multi-layer sensing interface for pressing detection.
The first type of knitting sensor is subjected to conductive treatment on the basis of knitting, thereby making it a resistance sensor. Many knitted sensors that conduct plating/coating wear or the conductive layer comes off during wear, which is not stable during long-term wear. While covering the knitted base with a conductive film may limit the stretch of the article or its breathability and water vapor permeability.
The second type of flat knitting sensor is often used to detect resistance changes when the fabric is subjected to a transverse and longitudinal tensile force, or resistance changes when the fabric is deformed after being subjected to a larger force in the vertical direction. Although this type of sensing fabric can detect a change in resistance caused by a force in the transverse and longitudinal directions, if the force in the vertical direction of the fabric is small (e.g., pressing, beating, etc.), the deformation of the fabric is small, and it is difficult to capture an accurate change in resistance.
It follows that in the prior art, the accuracy of the resistance of the knitted transducer is to be improved when worn or worn.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
The invention aims to solve the technical problems of the prior art, provides a fully-knitted three-dimensional interval type piezoresistive sensor and a knitting method thereof, and aims to solve the problem that the accuracy of resistance of the knitted sensor is required to be improved when the knitted sensor is worn or worn.
The technical scheme adopted for solving the technical problems is as follows:
a fully knitted three dimensional spaced piezoresistive sensor, comprising:
the first conductive yarn layer and the second conductive yarn layer are arranged at intervals;
a third conductive yarn layer woven between the first conductive yarn layer and the second conductive yarn layer;
wherein the first conductive yarn layer and the second conductive yarn layer are in contact with the third conductive yarn layer to be electrically conducted;
the resistance of the first conductive yarn layer and the resistance of the second conductive yarn layer are smaller than the resistance of the third conductive yarn layer.
The resistance of the conductive yarn in the third conductive yarn layer in unit length is 4-6 omega/cm;
The resistance of the conductive yarn in the first conductive yarn layer in unit length is 0.4-0.6 omega/cm;
the resistance per unit length of the conductive yarn in the second conductive yarn layer is 0.4-0.6 ohm/cm.
The fully-knitted three-dimensional interval piezoresistive sensor comprises a first conductive yarn layer, a second conductive yarn layer, a third conductive yarn layer, a fourth conductive yarn layer, a fifth conductive yarn layer and a fourth conductive yarn layer, wherein silver-plated conductive nylon filaments are adopted as conductive yarns in the first conductive yarn layer and the second conductive yarn layer;
the third conductive yarn layer is formed by blending stainless steel conductive fibers, silver fibers and polyester yarns.
The fully-knitted three-dimensional interval piezoresistive sensor is characterized in that the first conductive yarn layer and the second conductive yarn layer are woven by flat knitting;
the third conductive yarn layer is formed by knitting a tuck stitch.
The fully knitted three-dimensional spaced piezoresistive sensor, wherein the first conductive yarn layer comprises:
a plurality of first conductive yarns arranged in sequence, wherein each first conductive yarn forms a plurality of first coil structures, and the first coil structure of the next row of first conductive yarns is sleeved on the first coil structure of the previous row of first conductive yarns;
the second conductive yarn layer includes:
A plurality of second conductive yarns arranged in sequence, wherein each second conductive yarn forms a plurality of second coil structures, and the second coil structures of the second conductive yarns in the next row are sleeved on the second coil structures of the second conductive yarns in the previous row; the arrangement direction of the plurality of second conductive yarns is the same as the arrangement direction of the plurality of first conductive yarns;
the third conductive yarn layer includes:
the plurality of rows of third conductive yarns are connected with a corresponding first conductive yarn and a corresponding second conductive yarn, and four third conductive yarns are arranged in each row of third conductive yarns;
the first conductive yarn and the third conductive yarn are sequentially sleeved on a 4n+1-bit first coil structure and a 4n+3-bit second coil structure on the second conductive yarn;
the second third conductive yarn is sleeved on the first coil structure of 4n+3 bits on the first conductive yarn and the second coil structure of 4n+1 bits on the second conductive yarn in sequence;
the third conductive yarn is sleeved on the 4n+2 first coil structure of the first conductive yarn and the 4n+4 second coil structure of the second conductive yarn in sequence;
the fourth third conductive yarn is sleeved on the 4n+4-bit first coil structure of the first conductive yarn and the 4n+2-bit second coil structure of the second conductive yarn in sequence; n is a natural number.
The fully knitted three-dimensional interval piezoresistive sensor comprises a plurality of first conductive yarns, wherein the first conductive yarns are connected end to end; the second conductive yarns are connected end to end;
four third conductive yarns in each row of third conductive yarns are sequentially connected.
The fully knitted three-dimensional interval piezoresistive sensor comprises a first conductive yarn layer, a second conductive yarn layer and a third conductive yarn layer, wherein edges of the first conductive yarn layer, the second conductive yarn layer and the third conductive yarn layer are connected to a non-conductive fabric.
A method of knitting a fully knitted three dimensional spaced piezoresistive sensor according to any of the above claims, comprising the steps of:
knitting of the third conductive yarn layer:
knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the first direction by adopting third conductive yarns; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the second direction by adopting third conductive yarns; the second direction is opposite to the first direction, and needle positions of tuck knitting in the first direction and needle positions of tuck knitting in the second direction are arranged;
knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the first direction by adopting third conductive yarns; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the second direction by adopting third conductive yarns; the needle positions of the third conductive yarn tuck knitting in the first direction and the needle positions of the previous third conductive yarn tuck knitting in the first direction are positioned on adjacent needle positions of the same machine plate, and the needle positions of the tuck knitting in the first direction and the needle positions of the tuck knitting in the second direction are arranged oppositely;
The first conductive yarn layer and the second conductive yarn layer are woven in a first direction:
adopting two first conductive yarns to perform full needle loop knitting on a front machine plate along a first direction; adopting two second conductive yarns to perform full needle loop knitting on a rear machine plate along a first direction;
continuing the knitting of the third conductive yarn layer;
second direction knitting of the first conductive yarn layer and the second conductive yarn layer:
adopting two first conductive yarns to perform full needle loop knitting on a front machine plate along a second direction; adopting two second conductive yarns to perform full needle loop knitting on a rear machine plate along a second direction;
after one cycle of knitting is completed, the step of knitting the third conductive yarn layer is continued to perform the next cycle of knitting until the fully knitted three-dimensional interval piezoresistive sensor is obtained.
The method for knitting the fully knitted three-dimensional interval piezoresistive sensor, wherein before the step of knitting the third conductive yarn layer, the method for knitting further comprises the steps of:
knitting the front and rear machine plates with two first non-conductive yarns in a first direction at intervals to form loops;
after the first direction braiding step of the first and second conductive yarn layers, the braiding method further comprises the steps of:
Knitting two second non-conductive yarns on the front and rear machine plates at intervals in a second direction on one side of the sensor, which is away from the first non-conductive yarns; knitting the front and rear machine plates with two third non-conductive yarns in a first direction at intervals to form loops; the needle position of the second non-conductive yarn loop knitting is opposite to the needle position of the third non-conductive yarn loop knitting;
knitting the side of the sensor where the first non-conductive yarns are located by adopting two fourth non-conductive yarns on the front machine plate and the rear machine plate at intervals in the second direction; the needle position of the fourth non-conductive yarn loop knitting is opposite to the needle position of the first non-conductive yarn loop knitting;
after the step of knitting the first and second conductive yarn layers in the second direction, the knitting method further includes the steps of:
knitting two second non-conductive yarns on the front and rear machine plates at intervals in a second direction on one side of the sensor, which is away from the first non-conductive yarns; knitting the front and rear machine plates with two third non-conductive yarns in a first direction at intervals to form loops; the needle position of the second non-conductive yarn loop knitting is opposite to the needle position of the third non-conductive yarn loop knitting;
Knitting the side of the sensor where the first non-conductive yarns are located by adopting two fourth non-conductive yarns on the front machine plate and the rear machine plate at intervals in the second direction; the needle position of the fourth non-conductive yarn loop knitting is opposite to the needle position of the first non-conductive yarn loop knitting.
The weaving method of the fully-knitted three-dimensional interval piezoresistive sensor comprises the steps that the first non-conductive yarn performs tucking action at a first needle position of the third conductive yarn;
and the third non-conductive yarn performs a tuck motion at the last needle position of the third conductive yarn.
The beneficial effects are that: in a natural state, the three conductive yarn layers are connected in series, and the resistance of the sensor is mainly the resistance of the third conductive yarn layer. When the interval is reduced or part of the sensor is in direct contact, the first conductive yarn layer is in contact with the second conductive yarn layer to conduct electricity, the three conductive yarn layers are in series connection and parallel connection in a mixed mode, the resistance of the sensor can be reduced, moreover, the smaller the interval or the larger the contact area is, the larger the resistance reduction of the sensor is, the higher the sensitivity of the sensor is, the large detection range is, and the accurate measurement of the resistance of the sensor is realized.
Drawings
FIG. 1 is a schematic diagram of the structure of a fully knitted three-dimensional, spaced piezoresistive sensor according to the present invention.
FIG. 2 is a schematic diagram of the structure of a fully knitted three dimensional, spaced piezoresistive sensor in accordance with the present invention, when knitted.
FIG. 3 is a schematic diagram of a fully knitted three dimensional spaced piezoresistive sensor according to the present invention during the knitting process.
FIG. 4 is a front photograph (a), a back photograph (b), a left photograph (c) and a right photograph (d) of a fully knitted three-dimensional space piezoresistive sensor according to the present invention.
FIG. 5 is a schematic representation of the front lead (a) and back lead (b) of a fully knitted three dimensional spaced piezoresistive sensor according to the present invention.
FIG. 6 is a graph of electrical stress signals of the fully knitted three-dimensional spaced piezoresistive sensor according to the present invention when the sensor is worn by a person to perform various movements.
FIG. 7 is a graph of resistivity versus pressure for fully knitted three dimensional, spaced piezoresistive sensors of different sizes according to the present invention.
Fig. 8 is a schematic structural view of a second conductive yarn layer according to the present invention.
FIG. 9 is a side view of a fully knitted three-dimensional, spaced piezoresistive sensor according to the present invention.
FIG. 10 is a graph of resistivity versus elongation for fully knitted three dimensional spaced piezoresistive sensors of different sizes according to the present invention.
FIG. 11 is a schematic illustration of a fully knitted three dimensional spaced piezoresistive sensor according to the present invention when pressed.
FIG. 12 is a schematic representation of a fully knitted three-dimensional, spaced piezoresistive sensor according to the present invention when stretched.
Reference numerals illustrate:
10. a first conductive yarn layer; 11. a first coil structure; 20. a second conductive yarn layer; 21. a second coil structure; 30. a third conductive yarn layer; 31. and a third conductive yarn.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clear and clear, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Referring to FIGS. 1-12, embodiments of a fully knitted three-dimensional, spaced piezoresistive sensor are provided.
As shown in fig. 1 and 4, the fully knitted three-dimensional spaced piezoresistive sensor according to the present invention comprises:
a first conductive yarn layer 10 and a second conductive yarn layer 20 arranged at intervals;
a third conductive yarn layer 30 woven between the first conductive yarn layer 10 and the second conductive yarn layer 20;
Wherein the first conductive yarn layer 10 and the second conductive yarn layer 20 are in contact with the third conductive yarn layer 30 to be electrically conducted;
the resistance of the first conductive yarn layer 10 and the resistance of the second conductive yarn layer 20 are both smaller than the resistance of the third conductive yarn layer 30.
Specifically, the conductive yarn layer is a layered member woven by conductive yarns, the conductive yarns are yarns with conductivity as a whole, and the conductive yarns can be obtained by adopting a mode of blending conductive materials, plating conductive materials and the like. There is a space between the first conductive yarn layer 10 and the second conductive yarn layer 20, and the first conductive yarn layer 10 and the second conductive yarn layer 20 are not in direct contact or are in direct connection, and the third conductive yarn layer 30 is woven between the first conductive yarn layer 10 and the second conductive yarn layer 20 and plays a role of connecting the first conductive yarn layer 10 and the second conductive yarn layer 20, wherein the connection comprises physical connection and electrical connection. Due to the physical connection, when the first conductive yarn layer 10 or the second conductive yarn layer 20 is stressed, deformation and displacement may occur, and the distance between the first conductive yarn layer 10 and the second conductive yarn layer 20 may change, or direct contact with different areas may occur. Because of the electrical connection, the resistance of the sensor changes when the first conductive yarn layer 10 and the second conductive yarn are in a distance change or contact.
Since the resistance of the first conductive yarn layer 10 and the resistance of the second conductive yarn layer 20 are both smaller than the resistance of the third conductive yarn layer 30, in a natural state, the three conductive yarn layers are connected in series, and the resistance of the sensor is mainly the resistance of the third conductive yarn layer 30. When the interval is reduced or part of the first conductive yarn layer 10 is in direct contact with the second conductive yarn layer 20 to conduct electricity, the three conductive yarn layers are in series and parallel mixed connection, the resistance of the sensor can be reduced, moreover, the smaller the interval or the larger the contact area is, the larger the resistance reduction of the sensor is, the higher the sensitivity of the sensor is, the larger the detection range is, the accurate measurement of the resistance of the sensor is realized, and the sensor is particularly beneficial to ensuring the higher accuracy of the resistance under wearing or wearing.
Specifically, as shown in fig. 11, when the first conductive yarn layer 10 or the second conductive yarn layer 20 is forced in the vertical direction with the surface of the first conductive yarn layer 10 as a horizontal plane, the forced areas of the first conductive yarn layer 10 and the second conductive yarn layer 20 are deformed, so that the distance is reduced and the first conductive yarn layer and the second conductive yarn layer may contact each other. As shown in fig. 12, when the sensor is stressed in the horizontal direction, the stressed region of the third conductive yarn layer 30 is deformed by stretching, and the distance between the first conductive yarn layer 10 and the second conductive yarn layer 20 is reduced, and may contact each other. Therefore, stress in multiple sections in each dimension can be detected.
In a preferred implementation of the embodiment of the present invention, the resistance per unit length of the conductive yarn in the third conductive yarn layer 30 is 4-6 Ω/cm; the resistance per unit length of the conductive yarn in the first conductive yarn layer 10 is 0.4-0.6 ohm/cm; the resistance per unit length of the conductive yarn in the second conductive yarn layer 20 is 0.4 to 0.6 Ω/cm.
Specifically, the conductive yarns in the first conductive yarn layer 10 are denoted as first conductive yarns, the conductive yarns in the second conductive yarn layer 20 are denoted as second conductive yarns, and the conductive yarns in the third conductive yarn layer 30 are denoted as third conductive yarns 31. It will be appreciated that since the first conductive yarn layer 10 is woven from the first conductive yarn, although the resistance of the first conductive yarn layer 10 is not equal to the resistance per unit length of the first conductive yarn, the resistance per unit length of the third conductive yarn 31 is larger, the resistance per unit length of the first conductive yarn and the resistance per unit length of the second conductive yarn are smaller, the resistance of the third conductive yarn layer 30 is larger, and the resistance of the first conductive yarn layer 10 and the resistance of the second conductive yarn layer 20 are smaller. In addition, since the third conductive yarn layer 30 is to connect the first conductive yarn layer 10 and the second conductive yarn layer 20, the thickness of the third conductive yarn layer 30 is thicker, and the resistance of the third conductive yarn layer 30 is increased even more.
The second conductive yarn layer 20 serves as a support and connection ensuring that the first conductive yarn layer 10 and the third conductive yarn layer 30 are separated from each other and that the first conductive yarn layer 10 and the third conductive yarn layer 30 are connected in series. The second conductive yarns adopt conductive yarns with rigidity, which are favorable for supporting the first conductive yarn layer 10 and the third conductive yarn layer 30, and the second conductive yarns adopt conductive yarns with smooth surfaces, especially filament fibers with smooth surfaces, so that the second conductive yarns cannot be mutually wound and are easy to recover after being deformed under stress, and an elastic structure is formed.
In a preferred implementation of the embodiment of the present invention, as shown in fig. 1 and 4, the first conductive yarn layer 10 and the second conductive yarn layer 20 are woven by plain stitch.
Specifically, the first conductive yarn is woven with a plain weave to form the first conductive yarn layer 10, and the first conductive yarn layer 10 may specifically form a plain weave structure. The second conductive yarn is woven by plain stitch to form a second conductive yarn layer 20, and the second conductive yarn layer 20 may specifically form a plain weave structure.
In a preferred implementation of the embodiment of the present invention, as shown in fig. 1 and 3, the first conductive yarn layer 10 includes:
The first conductive yarns are sequentially arranged, each first conductive yarn forms a plurality of first coil structures 11, and the first coil structures 11 of the next row of first conductive yarns are sleeved on the first coil structures 11 of the previous row of first conductive yarns.
Specifically, the first coil structure 11 is in an Ω shape, and the first conductive yarn is formed by connecting a plurality of first coil structures 11, and the first coil structure 11 of the next row is sleeved on the first coil structure 11 of the previous row, thereby forming the first conductive yarn layer 10.
In a preferred implementation of the embodiment of the present invention, as shown in fig. 1, 3 and 8, the second conductive yarn layer 20 includes:
a plurality of second conductive yarns arranged in sequence, each second conductive yarn forming a plurality of second coil structures 21, the second coil structures 21 of the next row of second conductive yarns being sleeved on the second coil structures 21 of the previous row of second conductive yarns; the arrangement direction of the plurality of second conductive yarns is the same as the arrangement direction of the plurality of first conductive yarns. As shown in fig. 3, the first conductive yarn and the second conductive yarn are specifically conductive yarn a.
Specifically, the second coil structures 21 are in an Ω shape, and the second conductive yarns are formed by connecting a plurality of second coil structures 21, and the second coil structures 21 of the next row are sleeved on the second coil structures 21 of the previous row, thereby forming the second conductive yarn layer 20. In order to facilitate the knitting of the third conductive yarn 31, the second conductive yarn is arranged in the same direction as the first conductive yarn.
In a preferred implementation of the embodiment of the present invention, as shown in fig. 1-3, the third conductive yarn layer 30 is woven with tuck stitches.
Specifically, the third conductive yarn 31 is woven with tuck stitches to form the third conductive yarn layer 30. As shown in fig. 3, the third conductive yarn 31 is a conductive yarn B.
In a preferred implementation of the embodiment of the present invention, as shown in fig. 1-3, the third conductive yarn layer 30 includes:
the plurality of rows of third conductive yarns 31, each row of third conductive yarns 31 is connected with a corresponding first conductive yarn and a corresponding second conductive yarn, and four third conductive yarns 31 are arranged in each row of third conductive yarns 31;
the first third conductive yarn 31 is sleeved on the 4n+1 first coil structure 11 of the first conductive yarn and the 4n+3 second coil structure 21 of the second conductive yarn in sequence;
the second third conductive yarn 31 is sleeved on the 4n+3 first coil structure 11 of the first conductive yarn and the 4n+1 second coil structure 21 of the second conductive yarn in sequence;
the third conductive yarn 31 is sleeved on the 4n+2 first coil structure 11 of the first conductive yarn and the 4n+4 second coil structure 21 of the second conductive yarn in sequence;
The fourth third conductive yarn 31 is sleeved on the 4n+4 first coil structure 11 of the first conductive yarn and the 4n+2 second coil structure 21 of the second conductive yarn in sequence; n is a natural number.
Specifically, the third conductive yarn 31 forms a plurality of third coil structures, the third coil structures are in a shape of a Chinese character 'ji', and the plurality of third coil structures are sequentially connected to form the third conductive yarn 31. As shown in fig. 3 and 9, in the second row of fig. 3, the first third conductive yarn 31 passes through the first coil structure 11 of the first conductive yarn at 1,5,9, …,4n+1 bits and the second coil structure 21 of the second conductive yarn at 3,7, 11, …,4n+3 bits, specifically, the first third conductive yarn 31 passes through the first coil structure 11 of the first conductive yarn at 1 bits, then through the second coil structure 21 of the second conductive yarn at 3 bits, then through the first coil structure 11 of the first conductive yarn at 5 bits, then through the second coil structure 21 of the second conductive yarn at 7 bits, until passing through the first coil structure 11 of the first conductive yarn at 4n+1 bits, and finally through the second coil structure 21 of the second conductive yarn at 4n+3 bits, the first third conductive yarn 31 alternately interposed between the first conductive yarn and the second conductive yarn to connect the first conductive yarn and the second conductive yarn. The third, fourth, fifth, twelfth, thirteenth, fourteenth, and fifteenth rows in fig. 3 are similarly interleaved, except that the locations of the interleaving are different.
In a preferred implementation of the embodiment of the present invention, a plurality of the first conductive yarns are connected end to end; and a plurality of second conductive yarns are connected end to end.
Specifically, a plurality of first conductive yarns are connected end to form an integral conductive yarn. And a plurality of second conductive yarns are connected end to form the whole conductive yarn. That is, the first conductive yarn layer 10 may be formed by knitting a single conductive yarn, and the second conductive yarn layer 20 may be formed by knitting a single conductive yarn.
In a preferred implementation of the embodiment of the present invention, four third conductive yarns 31 in each row of third conductive yarns 31 are connected in sequence.
Specifically, each row of third conductive yarns 31 is also a conductive yarn sequentially connected to form an entire piece, specifically, as shown in fig. 3, the third conductive yarns 31 of the second row may be connected to the third conductive yarns 31 of the third row, the third conductive yarns 31 of the third row may be connected to the third conductive yarns 31 of the fourth row, and the third conductive yarns 31 of the fourth row may be connected to the third conductive yarns 31 of the fifth row. Two adjacent rows of third conductive yarns 31 may also be connected to each other, and the third conductive yarn layer 30 is formed by knitting a single conductive yarn.
In a preferred implementation of the embodiment of the present invention, as shown in fig. 4 to 5, the edges of the first conductive yarn layer 10, the second conductive yarn layer 20 and the third conductive yarn layer 30 are connected to a non-conductive fabric.
In particular, the sensor braid of the present application may be attached to a non-conductive fabric, such as clothing or the like. The non-conductive fabric enables the sensor to be worn or worn when worn or worn. In particular, the non-conductive fabric may be woven with the sensor. The end of the first conductive yarn layer 10 is led out from the back as a back wire; the ends of the second conductive yarn layer 20 are led out from the front as front conductors.
In a preferred implementation of the embodiment of the present invention, the conductive yarns in the first conductive yarn layer 10 and the conductive yarns in the second conductive yarn layer 20 are silver-plated conductive nylon filaments.
Specifically, the first conductive yarn and the second conductive yarn are silver-plated conductive nylon filaments, silver is plated on the surfaces of the nylon filaments, after the silver-plated conductive nylon filaments are woven into the first conductive yarn layer 10 and the second conductive yarn layer 20, the first conductive yarns are contacted with each other to conduct, and the second conductive yarns are contacted with each other to conduct, so that the first conductive yarn layer 10 and the second conductive yarn layer 20 form a sheet-shaped conductive structure, the cross-sectional area of the sheet-shaped conductive structure is larger and the thickness is thinner, and when the sheet-shaped conductive structure is conducted in the thickness direction (i.e. the direction of the first conductive yarn layer 10 facing the second conductive yarn layer 20), the overall resistance is smaller, that is, the resistance of the first conductive yarn layer 10 and the resistance of the second conductive yarn layer 20 are greatly reduced.
In a preferred implementation manner of the embodiment of the present invention, the conductive yarn in the third conductive yarn layer 30 is formed by blending stainless steel conductive fibers, silver fibers and polyester yarns.
Specifically, the third conductive yarn 31 is formed by blending stainless steel conductive fibers, silver fibers and polyester yarns. The surface of the third conductive yarn 31 also has conductivity, and after knitting, the third conductive yarn 31 contacts the first conductive yarn and the second conductive yarn to realize conduction, the third conductive yarn 31 contacts each other less, the third conductive yarn layer 30 forms a columnar conductive structure, and the columnar conductive structure has a larger length and a smaller cross-sectional area, and when conducting in the length direction (i.e., the direction of the first conductive yarn layer 10 facing the second conductive yarn layer 20), the overall resistance is larger, that is, the resistance of the third conductive yarn layer 30 is larger.
Based on the fully-knitted three-dimensional interval type piezoresistive sensor described in the above example, the invention further provides a preferred embodiment of a knitting method of the fully-knitted three-dimensional interval type piezoresistive sensor:
as shown in fig. 3, the weaving method of the fully knitted three-dimensional interval type piezoresistive sensor according to the embodiment of the invention comprises the following steps:
Step S100, knitting the front machine plate and the rear machine plate with two first non-conductive yarns in a first direction in a circle-by-circle mode.
Specifically, when the sensor is woven on a non-conductive fabric (i.e., a normal fabric), a portion of the non-conductive fabric is woven first, and a portion of the non-conductive fabric is woven on the left side of the sensor as shown in the first row of fig. 3. Two first non-conductive yarns are adopted to weave on the front machine plate and the rear machine plate in a circle at intervals along a first direction (right direction as shown in fig. 3), and needle positions of the front machine plate and the rear machine plate are separated by one position. After the non-conductive fabric is knitted, the tucking motion is continuously performed on the needle position of the knitting sensor, namely, the first non-conductive yarn performs the tucking motion on the first needle position of the third conductive yarn (the last needle position of the first row is shown in fig. 3).
Step S200, knitting a third conductive yarn layer:
knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the first direction by adopting third conductive yarns; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the second direction by adopting third conductive yarns; the second direction is opposite to the first direction, and needle positions of tuck knitting in the first direction and needle positions of tuck knitting in the second direction are arranged;
Knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the first direction by adopting third conductive yarns; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the second direction by adopting third conductive yarns; the needle position of the third conductive yarn tuck knitting in the first direction and the needle position of the previous third conductive yarn tuck knitting in the first direction are positioned on the adjacent needle position of the same machine plate, and the needle position of the tuck knitting in the first direction and the needle position of the tuck knitting in the second direction are oppositely arranged.
Specifically, as shown in the second to the fifth rows in fig. 3, in the third row, the third conductive yarn is knitted with a tuck of one-to-three positive and negative needles in the rightward direction, and the initial needle of the third conductive yarn is located at the needle position of the first non-conductive yarn for tuck motion, which is beneficial to realizing connection between the sensor and the non-conductive fabric. In the third row, the third conductive yarn is knitted by the tuck stitch of the positive needle and the negative needle at a distance from each other in the left direction, and the needle positions of the tuck stitch knitting in the right direction are opposite to the needle positions of the tuck stitch knitting in the left direction, wherein the opposite arrangement refers to two corresponding needle positions of different machine plates. In the fourth row, the third conductive yarn is knitted with tuck stitches of the positive needle and the negative needle at a distance of three in the left direction, and the needle position of tuck stitch knitting in the left direction (i.e. the fourth row) and the needle position of tuck stitch knitting in the upper left direction (i.e. the second row) are positioned at adjacent needle positions of the same machine plate. In the fifth row, the third conductive yarn is knitted by the tuck stitch of the positive needle and the negative needle at a distance from each other in the left direction, and the needle positions of the tuck stitch knitting in the right direction are opposite to the needle positions of the tuck stitch knitting in the left direction, namely, the needle positions of the fifth row and the needle positions of the fourth row are two opposite needle positions on different machine boards.
Step S300, knitting in a first direction of the first conductive yarn layer and the second conductive yarn layer:
adopting two first conductive yarns to perform full needle loop knitting on a front machine plate along a first direction; and (3) performing full needle loop knitting on the rear machine plate along the first direction by adopting two second conductive yarns.
Specifically, one first conductive yarn is adopted to make full-needle knitting on the front machine plate along the rightward direction, and the other first conductive yarn is adopted to make full-needle knitting on the front machine plate along the rightward direction. Then, one second conductive yarn is adopted to make full-needle knitting on the rear machine plate along the rightward direction, and the other second conductive yarn is adopted to make full-needle knitting on the rear machine plate along the rightward direction.
Step 400, knitting two second non-conductive yarns on the front and rear machine plates at intervals in a second direction on one side of the sensor, which is away from the first non-conductive yarns; knitting the front and rear machine plates with two third non-conductive yarns in a first direction at intervals to form loops; the needle position of the second non-conductive yarn loop knitting is opposite to the needle position of the third non-conductive yarn loop knitting; knitting the side of the sensor where the first non-conductive yarns are located by adopting two fourth non-conductive yarns on the front machine plate and the rear machine plate at intervals in the second direction; the needle position of the fourth non-conductive yarn loop knitting is opposite to the needle position of the first non-conductive yarn loop knitting.
Specifically, the non-conductive fabric is woven on the right side of the sensor using two second non-conductive yarns woven in a single loop on the front and rear panels in the left direction, particularly as shown in the eighth row of fig. 3. Then, two third non-conductive yarns are used to weave in a circle on the front and rear plates in the rightward direction. Before knitting, the third non-conductive yarn performs tucking at the last needle position of the third conductive yarn, that is, the last needle position of the fourth row (that is, the first needle position of the ninth row) performs tucking, which is specifically shown in the ninth row in fig. 3. Two fourth nonconductive yarns are used to weave in a loop in a left direction on the front and rear plates, particularly in the tenth row as shown in fig. 3.
It will be appreciated that the first non-conductive yarn of the first row and the fourth non-conductive yarn of the tenth row may be connected to form an integral non-conductive yarn. The second non-conductive yarn of the eighth row and the third non-conductive yarn of the ninth row may be connected to form an integral non-conductive yarn. The third conductive yarns of the second to five rows may be connected to form an integral conductive yarn.
And S500, knitting the front machine plate and the rear machine plate with two first non-conductive yarns in a first direction in a circle-by-circle mode.
Specifically, two first nonconductive yarns are woven in a single stitch on the front and rear panels in a leftward direction, as shown in the eleventh row. As in step S100, knitting of the partially non-conductive fabric continues.
Step S600, continuing the knitting of the third conductive yarn layer.
Specifically, knitting of the third conductive yarn layer is performed: knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the first direction by adopting third conductive yarns; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the second direction by adopting third conductive yarns; the second direction is opposite to the first direction, and needle positions of tuck knitting in the first direction and needle positions of tuck knitting in the second direction are arranged; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the first direction by adopting third conductive yarns; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the second direction by adopting third conductive yarns; the needle position of the third conductive yarn tuck knitting in the first direction and the needle position of the previous third conductive yarn tuck knitting in the first direction are positioned on the adjacent needle position of the same machine plate, and the needle position of the tuck knitting in the first direction and the needle position of the tuck knitting in the second direction are oppositely arranged. As in step S200, knitting of the third conductive yarn layer is continued, specifically, as shown in the twelfth to fifteenth rows of fig. 3.
Step S700, knitting in a second direction of the first conductive yarn layer and the second conductive yarn layer:
adopting two first conductive yarns to perform full needle loop knitting on a front machine plate along a second direction; and (3) performing full needle loop knitting on the rear machine plate along the second direction by adopting two second conductive yarns.
Specifically, two first conductive yarns are adopted to make full-needle knitting on the front machine plate along the left direction. And (3) adopting two second conductive yarns to make full-needle loop knitting on the rear machine plate along the left direction. The two first conductive yarns of the sixth row may be connected with the two first conductive yarns of the sixteenth row, and the two second conductive yarns of the seventh row may be connected with the two second conductive yarns of the seventeenth row, respectively. The difference from step S300 is the direction difference.
Step S800, knitting two second non-conductive yarns on the front and rear machine plates at intervals in a second direction on one side of the sensor, which is away from the first non-conductive yarns; knitting the front and rear machine plates with two third non-conductive yarns in a first direction at intervals to form loops; the needle position of the second non-conductive yarn loop knitting is opposite to the needle position of the third non-conductive yarn loop knitting; knitting the side of the sensor where the first non-conductive yarns are located by adopting two fourth non-conductive yarns on the front machine plate and the rear machine plate at intervals in the second direction; the needle position of the fourth non-conductive yarn loop knitting is opposite to the needle position of the first non-conductive yarn loop knitting.
Specifically, the non-conductive fabric is woven on the right side of the sensor using two second non-conductive yarns woven in a loop on the front and rear panels in a left direction, particularly in the eighteenth row as shown in fig. 3. Then, two third non-conductive yarns are used to weave in a circle on the front and rear plates in the rightward direction. Before knitting, the third non-conductive yarn performs tucking action on the last needle position of the third conductive yarn, namely, the last needle position of the fourteenth row (namely, the first needle position of the nineteenth row), and the tucking action is performed on the last needle position of the fourteenth row, namely, the first needle position of the nineteenth row, and the tucking action is specifically shown in the nineteenth row in fig. 3. Two fourth nonconductive yarns are used to weave in a single stitch in the left direction on the front and rear plates, particularly in the twentieth row as shown in fig. 3. Step S800 is the same as step S400, and knitting in one cycle is completed.
And step 900, after one cycle of knitting is completed, continuing the step of knitting the third conductive yarn layer, so as to perform the next cycle of knitting until the fully-knitted three-dimensional interval piezoresistive sensor is obtained.
Specifically, after one cycle of knitting is completed, the next cycle of knitting is performed, and the sensor is obtained after knitting of a proper size.
As shown in fig. 6, the sensor of the present invention is incorporated into the elbow joint, shoulder joint, collar, etc. of the garment, and the garment is put on. Then, the elbow joint flexion and extension movement, the shoulder joint flexion and extension movement, the double-arm opening and closing movement and the neck flexion and extension movement are respectively carried out. It can be seen that in the graph (a) of fig. 6, the sensor is incorporated in the elbow joint, and the stress electric signal output during the flexion and extension movement of the elbow joint changes more than the stress electric signal output during other movements. In fig. 6 (b) and (c), the sensor is incorporated in the shoulder joint, and the stress electric signal outputted during the flexion and extension movements of the shoulder joint and the opening and closing movements of the double arms is changed to a larger extent than the stress electric signal outputted during other movements. In fig. 6 (d), a sensor is incorporated in the neck, and the stress electric signal outputted during the neck flexion and extension movement is changed to a larger extent than the stress electric signal outputted during other movements.
As shown in fig. 7, sensors of different sizes were prepared, each having a linear relationship between resistance change rate (Δrjr0) and pressure over a certain stress range, with a better linear relationship, indicating a better sensitivity of the sensor.
As shown in fig. 10, sensors of different sizes were prepared, and once the touch sensor was stretched, the change in resistance change rate (Δr/R0) was remarkable, and after continuing the stretching, the change in resistance change rate (Δr/R0) was gradually retarded as the elongation increased.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (10)
1. A fully knitted three dimensional spaced piezoresistive sensor comprising:
the first conductive yarn layer and the second conductive yarn layer are arranged at intervals;
a third conductive yarn layer woven between the first conductive yarn layer and the second conductive yarn layer;
wherein the first conductive yarn layer and the second conductive yarn layer are in contact with the third conductive yarn layer to be electrically conducted;
the resistance of the first conductive yarn layer and the resistance of the second conductive yarn layer are smaller than the resistance of the third conductive yarn layer.
2. The fully knitted three dimensional space piezoresistive sensor according to claim 1, characterized in that the resistance per unit length of the conductive yarn in said third conductive yarn layer is 4-6 Ω/cm;
the resistance of the conductive yarn in the first conductive yarn layer in unit length is 0.4-0.6 omega/cm;
the resistance per unit length of the conductive yarn in the second conductive yarn layer is 0.4-0.6 ohm/cm.
3. The fully knitted three dimensional space piezoresistive sensor according to claim 2, characterized in that the conductive yarns in the first conductive yarn layer and the conductive yarns in the second conductive yarn layer are silver plated conductive nylon filaments;
the third conductive yarn layer is formed by blending stainless steel conductive fibers, silver fibers and polyester yarns.
4. The fully knitted three dimensional space piezoresistive sensor according to any of claims 1-3, characterized in that said first conductive yarn layer and said second conductive yarn layer are both knitted with plain stitch;
the third conductive yarn layer is formed by knitting a tuck stitch.
5. The fully knitted three-dimensional, spaced apart piezoresistive sensor according to claim 4, characterized in that said first conductive yarn layer comprises:
a plurality of first conductive yarns arranged in sequence, wherein each first conductive yarn forms a plurality of first coil structures, and the first coil structure of the next row of first conductive yarns is sleeved on the first coil structure of the previous row of first conductive yarns;
the second conductive yarn layer includes:
a plurality of second conductive yarns arranged in sequence, wherein each second conductive yarn forms a plurality of second coil structures, and the second coil structures of the second conductive yarns in the next row are sleeved on the second coil structures of the second conductive yarns in the previous row; the arrangement direction of the plurality of second conductive yarns is the same as the arrangement direction of the plurality of first conductive yarns;
The third conductive yarn layer includes:
the plurality of rows of third conductive yarns are connected with a corresponding first conductive yarn and a corresponding second conductive yarn, and four third conductive yarns are arranged in each row of third conductive yarns;
the first conductive yarn and the third conductive yarn are sequentially sleeved on a 4n+1-bit first coil structure and a 4n+3-bit second coil structure on the second conductive yarn;
the second third conductive yarn is sleeved on the first coil structure of 4n+3 bits on the first conductive yarn and the second coil structure of 4n+1 bits on the second conductive yarn in sequence;
the third conductive yarn is sleeved on the 4n+2 first coil structure of the first conductive yarn and the 4n+4 second coil structure of the second conductive yarn in sequence;
the fourth third conductive yarn is sleeved on the 4n+4-bit first coil structure of the first conductive yarn and the 4n+2-bit second coil structure of the second conductive yarn in sequence; n is a natural number.
6. The fully knitted three dimensional space piezoresistive sensor according to claim 5, characterized in that several of said first conductive yarns are connected end to end; the second conductive yarns are connected end to end;
Four third conductive yarns in each row of third conductive yarns are sequentially connected.
7. The fully knitted three dimensional space piezoresistive sensor according to claim 6, characterized in that the edges of said first, second and third conductive yarn layers are connected to a non-conductive fabric.
8. A method of knitting a fully knitted three dimensional spaced piezoresistive sensor according to any of the claims 5-7, comprising the steps of:
knitting of the third conductive yarn layer:
knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the first direction by adopting third conductive yarns; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the second direction by adopting third conductive yarns; the second direction is opposite to the first direction, and needle positions of tuck knitting in the first direction and needle positions of tuck knitting in the second direction are arranged;
knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the first direction by adopting third conductive yarns; knitting positive needles and negative needle collecting rings on the front machine plate and the rear machine plate at intervals of three along the second direction by adopting third conductive yarns; the needle positions of the third conductive yarn tuck knitting in the first direction and the needle positions of the previous third conductive yarn tuck knitting in the first direction are positioned on adjacent needle positions of the same machine plate, and the needle positions of the tuck knitting in the first direction and the needle positions of the tuck knitting in the second direction are arranged oppositely;
The first conductive yarn layer and the second conductive yarn layer are woven in a first direction:
adopting two first conductive yarns to perform full needle loop knitting on a front machine plate along a first direction; adopting two second conductive yarns to perform full needle loop knitting on a rear machine plate along a first direction;
continuing the knitting of the third conductive yarn layer;
second direction knitting of the first conductive yarn layer and the second conductive yarn layer:
adopting two first conductive yarns to perform full needle loop knitting on a front machine plate along a second direction; adopting two second conductive yarns to perform full needle loop knitting on a rear machine plate along a second direction;
after one cycle of knitting is completed, the step of knitting the third conductive yarn layer is continued to perform the next cycle of knitting until the fully knitted three-dimensional interval piezoresistive sensor is obtained.
9. The method of knitting a fully knitted three dimensional space piezoresistive sensor according to claim 8, characterized in that before the step of knitting the third conductive yarn layer, the method of knitting further comprises the steps of:
knitting the front and rear machine plates with two first non-conductive yarns in a first direction at intervals to form loops;
after the first direction braiding step of the first and second conductive yarn layers, the braiding method further comprises the steps of:
Knitting two second non-conductive yarns on the front and rear machine plates at intervals in a second direction on one side of the sensor, which is away from the first non-conductive yarns; knitting the front and rear machine plates with two third non-conductive yarns in a first direction at intervals to form loops; the needle position of the second non-conductive yarn loop knitting is opposite to the needle position of the third non-conductive yarn loop knitting;
knitting the side of the sensor where the first non-conductive yarns are located by adopting two fourth non-conductive yarns on the front machine plate and the rear machine plate at intervals in the second direction; the needle position of the fourth non-conductive yarn loop knitting is opposite to the needle position of the first non-conductive yarn loop knitting;
after the step of knitting the first and second conductive yarn layers in the second direction, the knitting method further includes the steps of:
knitting two second non-conductive yarns on the front and rear machine plates at intervals in a second direction on one side of the sensor, which is away from the first non-conductive yarns; knitting the front and rear machine plates with two third non-conductive yarns in a first direction at intervals to form loops; the needle position of the second non-conductive yarn loop knitting is opposite to the needle position of the third non-conductive yarn loop knitting;
Knitting the side of the sensor where the first non-conductive yarns are located by adopting two fourth non-conductive yarns on the front machine plate and the rear machine plate at intervals in the second direction; the needle position of the fourth non-conductive yarn loop knitting is opposite to the needle position of the first non-conductive yarn loop knitting.
10. The method of knitting a fully knit three-dimensional, compartmentalized piezoresistive sensor according to claim 9, wherein the first non-conductive yarn performs tuck motion at a first needle location of the third conductive yarn;
and the third non-conductive yarn performs a tuck motion at the last needle position of the third conductive yarn.
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| CN117606652A (en) * | 2023-11-21 | 2024-02-27 | 江南大学 | Integral piezoresistive flexible sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117606652A (en) * | 2023-11-21 | 2024-02-27 | 江南大学 | Integral piezoresistive flexible sensor |
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