CN112444330A - Fabric separating pressure sensor - Google Patents
Fabric separating pressure sensor Download PDFInfo
- Publication number
- CN112444330A CN112444330A CN202011258596.7A CN202011258596A CN112444330A CN 112444330 A CN112444330 A CN 112444330A CN 202011258596 A CN202011258596 A CN 202011258596A CN 112444330 A CN112444330 A CN 112444330A
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- China
- Prior art keywords
- warp
- fabric
- spacer fabric
- knitted spacer
- pressure sensor
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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
- G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
- G01L1/142—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators using capacitors
Abstract
The invention discloses a capacitance type pressure sensor based on a warp-knitted spacer fabric, which comprises a dielectric layer and an electrode plate connected with the dielectric layer, wherein the dielectric layer is the warp-knitted spacer fabric, the electrode plate is a conductive fabric, the conductive fabric is arranged on both sides of the warp-knitted spacer fabric, and a lead pin is connected to the conductive fabric. The invention combines the advantages of good compression resistance, excellent air permeability and moisture permeability and the like of the warp-knitted spacer fabric, provides the flexible sensor which can be integrated into the daily textile, can detect pressure change, and has the characteristics of good portability, high sensitivity, environmental protection, comfort and the like.
Description
Technical Field
The invention relates to a capacitance type pressure sensor based on warp-knitted spacer fabrics, and belongs to the technical field of textile processing.
Background
In daily life, textiles are the most frequently used consumer goods for people. In recent years, with the increasing demands of people on the aspects of sports fitness, medical care, safety protection and the like, intelligent textiles with special functions are produced and rapidly developed. Early intelligent textiles embedded rigid sensors, circuit boards, CPUs and other components in traditional fabrics, and had the disadvantages of being heavy, obtrusive and difficult to clean. The research on the flexible sensor based on the textile material and the structure solves the problems, and improves the flexibility and the comfort of the intelligent textile.
Disclosure of Invention
In order to overcome the shortcomings of the prior art, the present invention provides a capacitive pressure sensor based on a warp-knitted spacer fabric.
The invention is realized by the following technical scheme:
the spacer fabric pressure sensor comprises a medium layer and an electrode plate connected with the medium layer, wherein the medium layer is a warp-knitted spacer fabric, the electrode plate is a conductive fabric, the conductive fabric is arranged on two sides of the warp-knitted spacer fabric, and a lead pin is connected to the conductive fabric.
The capacitance type pressure sensor based on the warp-knitted spacer fabric is characterized in that the thickness of the warp-knitted spacer fabric is 7-21 mm.
In the capacitive pressure sensor based on the warp-knitted spacer fabric, both surfaces of the warp-knitted spacer fabric can be in a mesh structure, a plain weave structure and the like.
The capacitive pressure sensor based on the warp-knitted spacer fabric is characterized in that the conductive fabric is a high-density plain woven fabric subjected to conductive coating treatment, a weft-knitted conductive fabric woven by conductive yarns or a warp-knitted conductive fabric.
According to the capacitance type pressure sensor based on the warp-knitted spacer fabric, the dielectric layer is attached to the electrode plate through the adhesive.
According to the capacitance type pressure sensor based on the warp-knitted spacer fabric, the electrode plates are covered on the dielectric layer in a complete covering mode, a partial covering mode or a multi-area arrangement covering mode.
According to the capacitance type pressure sensor based on the warp-knitted spacer fabric, the lead pins are adhered to the electrode plate through the insulating adhesive tapes.
The invention achieves the following beneficial effects:
when the pressure sensor is acted by external force, the distance between the warp-knitted spacer fabrics is changed, so that the capacitance value is changed, and the purpose of measuring the pressure change is realized.
The invention combines the advantages of good compression resistance, excellent air permeability and moisture permeability and the like of the warp-knitted spacer fabric, provides the flexible sensor which can be integrated into the daily textile, can detect pressure change, and has the characteristics of good portability, high sensitivity, environmental protection, comfort and the like. Page 1/3 of description 3CN 110440958A 3
Drawings
FIG. 1 is a schematic diagram of a capacitive sensor according to the present invention;
FIG. 2 is a front view of FIG. 1;
FIG. 3 is a schematic diagram of a capacitive sensor according to the present invention;
FIG. 4 is a strain-capacitance curve of the capacitive sensor of example 1 under ten repeated compressions;
in the figure: 1. the device comprises a dielectric layer, 2, a binder, 3, an electrode plate, 4, a lead pin, 5 and an adhesive tape.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The preparation method of the capacitive pressure sensor of the warp-knitted spacer fabric comprises the following specific steps:
(1) a double-needle-bar warp knitting machine RD6N is selected, wherein GB1-GB3 guide bars are used for knitting the upper surface of the spacer fabric, GB5-GB6 guide bars are used for knitting the lower surface of the spacer fabric, and GB4 plays a role in connecting the upper surface and the lower surface. The machine number is E12, the machine width is 130 inches, and the flower disc cam traversing, electronic let-off mechanism and electronic pulling mechanism are adopted.
(2) The surface layer of the spacer fabric is woven by 33.33tex144f polyester multifilament, and the connecting layer of the spacer fabric is woven by 27.77tex polyester monofilament. Mesh structures are selected on two surfaces of the spacer fabric, and the specific yarn laying process is GB.
(3) The woven high-density conductive adhesive tape is used as an electrode plate. In the embodiment, the woven high-density conductive adhesive tape is a conductive high-density woven fabric which is made by plating a layer of nickel metal substance on a high-density woven fabric, plating a layer of copper metal substance with high conductivity and coating acrylic adhesive on the back, wherein the thickness of the conductive high-density woven fabric is 0.1mm, and the resistance of the conductive high-density woven fabric is 105 omega/cm 2. The woven high-density conductive adhesive tape is directly attached to the two surfaces of the space fabric, and the size of the electrode and the size of the dielectric layer are both 10cm multiplied by 10 cm.
(4) And fixing the lead pins on the surfaces of the two electrode plates respectively by using an insulating tape. The capacitance signal value is transmitted to the test instrument through the lead pin.
Fig. 4 is a strain-capacitance curve of the capacitive pressure sensor prepared in the above embodiment under the condition of repeating ten times of compression, and it can be seen from the graph that the spacer fabric capacitive pressure sensor of the present invention can be successfully converted into a change in capacitance value according to a change in external pressure, so as to implement monitoring of a pressure value.
Example 2
The preparation method of the capacitive pressure sensor of the warp-knitted spacer fabric comprises the following specific steps:
(1) a double-needle-bar warp knitting machine RD6N is selected, wherein GB1-GB3 guide bars are used for knitting the upper surface of the spacer fabric, GB5-GB6 guide bars are used for knitting the lower surface of the spacer fabric, and GB4 plays a role in connecting the upper surface and the lower surface. The machine number is E12, the machine width is 130 inches, and the flower disc cam traversing, electronic let-off mechanism and electronic pulling mechanism are adopted.
(2) The surface layer of the spacer fabric is woven by 33.33tex144f polyester multifilament, and the connecting layer of the spacer fabric is woven by 35.55tex polyester monofilament.
In this embodiment, the spacer fabric has a mesh structure on one surface and a plain structure on the other surface, and the specific lapping process is GB 1.
(3) The weft-knitted conductive fabric is used as an electrode plate. In this example, the selected weft-knitted conductive fabric was woven from 8.33tex nylon and 4.44tex silver-plated nylon yarn on a SM8-TOP2MP2 Saint-Tony single-sided seamless forming underwear machine with a machine cylinder diameter of 15 inches and a machine number of E28. The fabric was plain plaited with a thickness of 0.79mm, a cross-density of 17.5wpc and a machine-density of 24 cpc. In this embodiment, double-sided adhesive tape is used as a bonding agent, the weft-knitted conductive fabric is attached to two surfaces of the spacer fabric in the step (2), the size of the electrode is 5cm × 6cm, and the size of the dielectric layer is 10cm × 10 cm.
(4) And fixing the lead pins on the surfaces of the two electrode plates respectively by using an insulating tape. The capacitance signal value is transmitted to the test instrument through the lead pin.
The warp-knitted spacer fabric is of a sandwich structure, has upper and lower fabric surfaces and intermediate spacer filaments, and has good compression resistance, environmental protection, air permeability and moisture permeability. At present, a great deal of research is carried out on the compression performance, the tensile performance and the air and moisture permeability of the warp-knitted spacer fabric at home and abroad, so that the capacitance type pressure sensor manufactured by using the warp-knitted spacer fabric as a dielectric layer has certain theoretical and practical basis.
Example 3
The preparation method of the capacitive pressure sensor of the warp-knitted spacer fabric comprises the following specific steps:
(1) a double-needle-bar warp knitting machine RD6N is selected, wherein GB1-GB3 guide bars are used for knitting the upper surface of the spacer fabric, GB5-GB6 guide bars are used for knitting the lower surface of the spacer fabric, and GB4 plays a role in connecting the upper surface and the lower surface. The machine number is E12, the machine width is 130 inches, and the flower disc cam traversing, electronic let-off mechanism and electronic pulling mechanism are adopted.
(2) The surface layer of the spacer fabric is woven by 33.33tex144f polyester multifilament, and the connecting layer of the spacer fabric is woven by 46.66tex polyester monofilament. In this embodiment, the spacer fabric has a mesh structure on one surface and a plain structure on the other surface, and the specific lapping process is GB 1.
(3) The warp-knitted conductive fabric is used as an electrode plate. In this example, the selected warp-knitted conductive fabric was knitted on a HKS3 tricot machine, having a machine number E28, a fabric thickness of 1.93mm, a weft count of 16 rows/cm, and a warp count of 20 courses/cm. In this example, the warp-knitted conductive fabric was attached to both surfaces of the spacer fabric in step (2) using double-sided tape as an adhesive, and the size of the electrode and the dielectric layer was 5cm × 5 cm.
(4) And fixing the lead pins on the surfaces of the two electrode plates respectively by using an insulating tape. The capacitance signal value is transmitted to the test instrument through the lead pin.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (7)
1. The capacitive pressure sensor based on the warp-knitted spacer fabric comprises a dielectric layer and an electrode plate connected with the dielectric layer, and is characterized in that the dielectric layer is the warp-knitted spacer fabric, the electrode plate is a conductive fabric, the conductive fabric is arranged on two sides of the warp-knitted spacer fabric, and a lead pin is connected to the conductive fabric.
2. The warp-knitted spacer fabric-based capacitive pressure sensor according to claim 1, wherein the warp-knitted spacer fabric has a thickness of 7-21 mm.
3. The warp-knitted spacer fabric-based capacitive pressure sensor as claimed in claim 1, wherein both surfaces of the warp-knitted spacer fabric may be in a mesh, plain weave or the like configuration.
4. The warp-knitted spacer fabric-based capacitive pressure sensor of claim 1, wherein the conductive fabric is a conductive coated high-density plain woven fabric, a conductive yarn-woven weft-knitted conductive fabric, or a warp-knitted conductive fabric.
5. The warp-knitted spacer fabric-based capacitive pressure sensor according to claim 1, wherein the dielectric layer and the electrode plate are bonded together by an adhesive.
6. The warp-knitted spacer fabric-based capacitive pressure sensor according to claim 1, wherein the electrode plates are covered on the dielectric layer in a full coverage manner, a partial coverage manner or a multi-area arrangement coverage manner.
7. The warp-knitted spacer fabric-based capacitive pressure sensor according to claim 1, wherein the lead pins are adhered to the electrode plate using an insulating tape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011258596.7A CN112444330A (en) | 2020-11-12 | 2020-11-12 | Fabric separating pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011258596.7A CN112444330A (en) | 2020-11-12 | 2020-11-12 | Fabric separating pressure sensor |
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| Publication Number | Publication Date |
|---|---|
| CN112444330A true CN112444330A (en) | 2021-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011258596.7A Pending CN112444330A (en) | 2020-11-12 | 2020-11-12 | Fabric separating pressure sensor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114812876A (en) * | 2022-04-20 | 2022-07-29 | 慕思健康睡眠股份有限公司 | Flexible sensor and intelligent pad |
| RU2800738C2 (en) * | 2021-12-27 | 2023-07-27 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева" (СибГУ им. М.Ф. Решетнева) | Method for manufacturing strain-resistive sensor made in form of a woven fabric from conductive carbon fibers and dielectric fibers |
-
2020
- 2020-11-12 CN CN202011258596.7A patent/CN112444330A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2800738C2 (en) * | 2021-12-27 | 2023-07-27 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирский государственный университет науки и технологий имени академика М.Ф. Решетнева" (СибГУ им. М.Ф. Решетнева) | Method for manufacturing strain-resistive sensor made in form of a woven fabric from conductive carbon fibers and dielectric fibers |
| CN114812876A (en) * | 2022-04-20 | 2022-07-29 | 慕思健康睡眠股份有限公司 | Flexible sensor and intelligent pad |
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