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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 10883814 B1

PDFFull Text
Date of Patent:
Jan. 05, 2021

Filed:

May. 09, 2017

Highly stretchable strain sensor for human motion monitoring

Applicant:

South Dakota Board of Regents, Pierre, SD (US);

Inventors:

Zhengtao Zhu, Rapid City, SD (US);

Yichun Ding, Rapid City, SD (US);

Yongchen Yang, Rapid City, SD (US);

Assignee:

SOUTH DAKOTA BOARD OF REGENTS, Pierre, SD (US);

Attorney:

Goodhue, Coleman & Owens, P.C.

Primary Examiner:

Octavia Hollington

Int. Cl.
CPC ...
G01B 7/16 (2006.01); D01F 6/18 (2006.01); D01F 9/22 (2006.01); B32B 5/02 (2006.01); B32B 27/40 (2006.01); D01D 5/00 (2006.01); B32B 27/12 (2006.01); B82Y 30/00 (2011.01); B32B 5/26 (2006.01); B32B 27/38 (2006.01); B32B 27/08 (2006.01); B29C 41/00 (2006.01); B29K 75/00 (2006.01); B29L 7/00 (2006.01);
U.S. Cl.
CPC ...
G01B 7/18 (2013.01); B29C 41/003 (2013.01); B32B 5/022 (2013.01); B32B 5/26 (2013.01); B32B 27/08 (2013.01); B32B 27/12 (2013.01); B32B 27/38 (2013.01); B32B 27/40 (2013.01); B82Y 30/00 (2013.01); D01D 5/003 (2013.01); D01D 5/0038 (2013.01); D01F 6/18 (2013.01); D01F 9/225 (2013.01); B29K 2075/00 (2013.01); B29L 2007/008 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2260/021 (2013.01); B32B 2260/046 (2013.01); B32B 2262/106 (2013.01); B32B 2307/20 (2013.01); B32B 2307/51 (2013.01); B32B 2307/54 (2013.01);
Abstract

A method to assemble a highly stretchable and highly sensitive strain sensor. Carbon nanofibers prepared by electrospinning of PAN followed by stabilization and carbonization, are sandwiched in two layers of elastomer PU. The CNFs/PU strain sensor shows large strain range of 300%, high sensitivity with gauge factor up to 72.5, and superior stability and durability during 8000 cycles of stretch/release. The CNFs/PU strain sensor shows fast, stable and reproducible responses following the bending movement of fingers, wrists, and elbows. The flexible CNFs/PU strain sensor with has broad applications in wearable devices for human motion monitoring.

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