Warp Breaks Detection in Jacquard Weaving using MEMS

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dc.contributor.advisor George Hodge, Committee Co-Chair en_US
dc.contributor.advisor William Oxenham, Committee Member en_US
dc.contributor.advisor Peter Bloomfield, Committee Member en_US
dc.contributor.advisor Abdel-Fattah M. Seyam, Committee Co-Chair en_US
dc.contributor.author Lee, Jin Ho en_US
dc.date.accessioned 2010-04-02T18:35:03Z
dc.date.available 2010-04-02T18:35:03Z
dc.date.issued 2005-04-27 en_US
dc.identifier.other etd-04202005-134520 en_US
dc.identifier.uri http://www.lib.ncsu.edu/resolver/1840.16/3710
dc.description.abstract Microelectromechanical systems or MEMS technology has gone from an interesting academic exercise to an integral part of many applications in several industries. However, little work has been done in researching applications for MEMS in textiles. Research related to warp breaks has been limited to monitoring break frequency and the reason associated with breaks in order to improve warp yarn quality. While this approach led to improvement in weaving efficiency, warp breaks still represent a major problem, especially for today's high-speed weaving machines. Researchers have been trying to develop commercial automated systems to repair warp breaks with no success. The goal of this study is to explore inexpensive methods to detect warp breaks using nontraditional technique that would pave the way to automate warp break repair. To achieve the goal, a system that can detect warp breaks using MEMS accelerometers as sensors was developed for Jacquard weaving. The MEMS accelerometers were mounted on harness cords of a Jacquard tie. MEMS output acceleration signals components in the vertical and horizontal directions were analyzed using time and frequency domains. The signals were acquired while warp ends are running and at the moment of intentional breaks. The analysis led to a successful detection of warp breaks especially using the horizontal acceleration component that is mainly due to harness cord vibration. Three experimental designs were conducted to investigate the effect of weave design, warp yarn type, and warp yarn tension on the output signal strength which is measured by amplitude in time domain. It was found that warp break for weave with longer floats showed (shedding motion operates in open shed principal) stronger output signal as compared to plain weave. Increasing warp tension caused an increase of the output signal strength. The output signal increased with increase in yarn modulus. en_US
dc.rights I hereby certify that, if appropriate, I have obtained and attached hereto a written permission statement from the owner(s) of each third party copyrighted matter to be included in my thesis, dissertation, or project report, allowing distribution as specified below. I certify that the version I submitted is the same as that approved by my advisory committee. I hereby grant to NC State University or its agents the non-exclusive license to archive and make accessible, under the conditions specified below, my thesis, dissertation, or project report in whole or in part in all forms of media, now or hereafter known. I retain all other ownership rights to the copyright of the thesis, dissertation or project report. I also retain the right to use in future works (such as articles or books) all or part of this thesis, dissertation, or project report. en_US
dc.subject detection en_US
dc.subject MEMS en_US
dc.subject DAQ en_US
dc.subject warp yarn tension en_US
dc.subject warp break en_US
dc.title Warp Breaks Detection in Jacquard Weaving using MEMS en_US
dc.degree.name PhD en_US
dc.degree.level dissertation en_US
dc.degree.discipline Fiber and Polymer Science en_US

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