skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Embedded sensor having an identifiable orientation

Abstract

An apparatus and method is described wherein a sensor, such as a mechanical strain sensor, embedded in a fiber core, is "flagged" to identify a preferred orientation of the sensor. The identifying "flag" is a composite material, comprising a plurality of non-woven filaments distributed in a resin matrix, forming a small planar tab. The fiber is first subjected to a stimulus to identify the orientation providing the desired signal response, and then sandwiched between first and second layers of the composite material. The fiber, and therefore, the sensor orientation is thereby captured and fixed in place. The process for achieving the oriented fiber includes, after identifying the fiber orientation, carefully laying the oriented fiber onto the first layer of composite, moderately heating the assembled layer for a short period in order to bring the composite resin to a "tacky" state, heating the second composite layer as the first, and assembling the two layers together such that they merge to form a single consolidated block. The consolidated block achieving a roughly uniform distribution of composite filaments near the embedded fiber such that excess resin is prevented from "pooling" around the periphery of the fiber.

Inventors:
 [1];  [2]
  1. (31 Portola Ct., Danville, CA 94506)
  2. (840 Cabot Ct., San Carlos, CA 94070)
Issue Date:
Research Org.:
SANDIA CORP
OSTI Identifier:
874589
Patent Number(s):
6420696
Assignee:
Bennett; Thomas E. (31 Portola Ct., Danville, CA 94506); Nelson; Drew V. (840 Cabot Ct., San Carlos, CA 94070) SNL
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
embedded; sensor; identifiable; orientation; apparatus; method; described; mechanical; strain; fiber; core; flagged; identify; identifying; flag; composite; material; comprising; plurality; non-woven; filaments; distributed; resin; matrix; forming; planar; subjected; stimulus; providing; signal; response; sandwiched; layers; captured; fixed; process; achieving; oriented; carefully; laying; layer; moderately; heating; assembled; period; bring; tacky; assembling; merge; form; single; consolidated; block; roughly; uniform; distribution; near; excess; prevented; pooling; periphery; composite material; uniform distribution; /250/

Citation Formats

Bennett, Thomas E., and Nelson, Drew V. Embedded sensor having an identifiable orientation. United States: N. p., 2002. Web.
Bennett, Thomas E., & Nelson, Drew V. Embedded sensor having an identifiable orientation. United States.
Bennett, Thomas E., and Nelson, Drew V. Tue . "Embedded sensor having an identifiable orientation". United States. https://www.osti.gov/servlets/purl/874589.
@article{osti_874589,
title = {Embedded sensor having an identifiable orientation},
author = {Bennett, Thomas E. and Nelson, Drew V.},
abstractNote = {An apparatus and method is described wherein a sensor, such as a mechanical strain sensor, embedded in a fiber core, is "flagged" to identify a preferred orientation of the sensor. The identifying "flag" is a composite material, comprising a plurality of non-woven filaments distributed in a resin matrix, forming a small planar tab. The fiber is first subjected to a stimulus to identify the orientation providing the desired signal response, and then sandwiched between first and second layers of the composite material. The fiber, and therefore, the sensor orientation is thereby captured and fixed in place. The process for achieving the oriented fiber includes, after identifying the fiber orientation, carefully laying the oriented fiber onto the first layer of composite, moderately heating the assembled layer for a short period in order to bring the composite resin to a "tacky" state, heating the second composite layer as the first, and assembling the two layers together such that they merge to form a single consolidated block. The consolidated block achieving a roughly uniform distribution of composite filaments near the embedded fiber such that excess resin is prevented from "pooling" around the periphery of the fiber.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

Save / Share: