Binary encoding of sensors in textile structures

Patent metadata

Field	Value
Publication number	US-2017233902-A1
Application number	US-201715444008-A
Country	US
Kind code	A1
Filing date	Feb 27, 2017
Priority date	Aug 27, 2014
Publication date	Aug 17, 2017
Grant date	—

Abstract

A system and method comprising binary coding in a textile structure can include a textile sensor configured to sense a property and having a yarn pattern. A binary code can be associated with the yarn pattern. When the textile sensor senses the property, the property alters relative positions of yarns in the yarn pattern, causing the associated binary code to change. A particular change in the binary code represents a defined value of the property. As a result, a second textile sensor having a second yarn pattern can be designed based on the unique binary codes of the first textile sensor measurements, such that the second textile sensor provides predictable responses to different property values.

First claim

What is claimed is:

1 . A system, comprising:
a textile sensor configured to sense a property and having a yarn pattern that encodes a binary code; and wherein when the textile sensor senses the property, the property alters relative positions of yarns in the yarn pattern, causing the associated binary code to change, and wherein a particular change in the binary code represents a defined value of the property.

2 . The system of claim 1 , wherein the textile sensor comprises a first textile sensor having a first yarn pattern, and:
wherein the first textile sensor is measurable to produce a plurality of measurements indicative of the property, each measurement comprising a different property value having a unique binary code; wherein the system further comprises: a second textile sensor having a second yarn pattern based on the unique binary codes of the first textile sensor measurements, and wherein the second textile sensor provides predictable responses to different property values.

3 . The system of claim 2 , wherein the unique binary codes are each associated with a discrete alteration in relative positions of yarns in the first yarn pattern resulting from one of the different measured property values.

4 . The system of claim 2 , the first yarn pattern having a first binary code and the second yarn pattern having a second binary code,
wherein the second binary code and the second yarn pattern are the same as the first binary code and the first yarn pattern, whereby responses to different property values are the same in the first and second textile sensors.

5 . The system of claim 2 , the first yarn pattern having a first binary code and the second yarn pattern having a second binary code,
wherein the second binary code and the second yarn pattern are different than the first binary code and the first yarn pattern, whereby a response to a particular property value is different in the first and second textile sensors.

6 . The system of claim 1 , wherein the textile sensor comprises electrically conductive yarn,
wherein when the property alters relative positions of yarns in the yarn pattern, conductivity of the yarn pattern changes, and wherein a resulting binary code represents a defined level of conductivity.

7 . The system of claim 1 , wherein the textile sensor is knitted and the yarn pattern comprises a stitch pattern.

8 . The system of claim 1 , wherein the textile sensor is woven and the yarn pattern comprises a weave pattern.

9 . The system of claim 7 , wherein the textile sensor comprises a plurality of stitch types, and each type of stitch is encoded with a unique binary code.

10 . The system of claim 7 , the textile sensor further comprising electrically conductive yarn, wherein yarn contact points between knit loops in the stitch pattern provide an area of relatively greater conductivity and areas in the stitch pattern without contact between knit loops provide relatively lower conductivity, wherein yarn contact points are encoded with a binary 1 and areas without contact are encoded with a binary 0.

11 . The system of claim 10 , wherein the binary code for a single jersey stitch comprises 1010, the binary code for a miss stitch comprises 0000, and the binary code for a tuck stitch comprises 1100.

12 . The system of claim 7 , wherein the stitch pattern is weft knit, warp knit, or embroidered.

13 . The system of claim 1 , wherein the property is selected from a group consisting of pressure, force, temperature, and humidity.

14 . The system of claim 1 , wherein the textile sensor is comprised in a two-dimensional fabric.

15 . The system of claim 1 , wherein the textile sensor is comprised in a three-dimensional fabric.

16 . The system of claim 1 , wherein the textile sensor is integrated in a wearable garment.

17 . The system of claim 16 , wherein the wearable garment is selected from a group consisting of a compression garment, compression pump, burn management garment, sleeve device, and athletic garment.

18 . The system of claim 1 wherein the yarns are skip coated with a conductive material such that portions of the yarns are coated with the conductive material and portions of the yarn are not coated with the conductive material.

19 . The system of claim 18 wherein the coated and uncoated portions of the yarns encode the binary code.

20 . The system of claim 1 comprising a conductive yarn incorporated into a fabric using a laid in process, wherein the conductive yarn electrically connects non-adjacent sensors in the fabric.

21 . The system of claim 20 comprising an embroidered structure incorporated into the fabric, wherein the embroidered structure is electrically connected to the conductive yarn incorporated into the fabric using the laid in process.

22 . The system of claim 1 wherein at least some of the yarns comprise electroactive polymers.

23 . A textile sensing system, comprising:
a textile sensor configured to sense a property and having a yarn pattern associated with a binary code; a measuring device for measuring changes in the binary code; and a property determination module for determining a value of the sensed property, wherein when the textile sensor senses the property, the property alters relative positions of yarns in the yarn pattern, causing the associated binary code to change, and wherein the property determination module determines the value of the sensed property based on a particular change in the binary code.

24 . The system of claim 23 , wherein the textile sensor is knitted, the yarn pattern comprises a stitch pattern comprising a plurality of stitch types, and each type of stitch is encoded with a unique binary code.

25 . The system of claim 23 , wherein the textile sensor comprises electrically conductive yarn,
wherein when the property alters relative positions of yarns in the yarn pattern, conductivity of the yarn pattern changes, and wherein a resulting binary code represents a defined level of conductivity.

26 . The system of claim 23 , wherein the textile sensor is integrated in a wearable garment.

27 . A method, comprising:
providing a textile sensor configured to sense a property and having a yarn pattern; associating a binary code with the yarn pattern; applying the textile sensor to a subject having the property so that the textile sensor senses the property, wherein the property alters relative positions of yarns in the yarn pattern, causing the associated binary code to change; and correlating a particular change in the binary code with a defined value of the property.

28 . The method of claim 27 , wherein the textile sensor comprises a first textile sensor having a first yarn pattern, and wherein the method further comprises:
taking a plurality of measurements of the first textile sensor sensing the property, each measurement comprising a different property value; associating a unique binary code with each of the different measured property values; and designing a second textile sensor having a second yarn pattern based on the unique binary codes of the first textile sensor measurements, wherein the second textile sensor provides predictable responses to the different property values.

29 . The method of claim 28 , further comprising associating each of the unique binary codes with a

Assignees

• Univ North Carolina State

Inventors

• Grant Edward
• Livingston Frederick Jerard
• Craver Matthew David
• Hegarty-Craver Meghan Sarah
• Reid Jr Lawrence Gibson

Classifications

• D03D1/0088 Primary

  Fabrics having an electronic function · CPC title

• G01D5/12

  using electric or magnetic means (G01D5/06 takes precedence) · CPC title

• D04B1/16

  synthetic threads · CPC title

• G06F3/011

  Arrangements for interaction with the human body, e.g. for user immersion in virtual reality (blind teaching G09B21/00) · CPC title

• D10B2401/16

  antistatic; conductive · CPC title