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Research on Broken Viscose Filament Detecting and Filament Length Measuring

Author: YinZhengBao
Tutor: ZhouLiPing；ChenLiangZhou
School: Huazhong University of Science and Technology
Course: Measuring Technology and Instruments
Keywords: Viscose filament yarn Wool yarn Photodetector Coning Length
CLC: TS107
Type: Master's thesis
Year: 2009
Downloads: 27
Quote: 2
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Abstract


Detection and filament winding textile industry is a very important two processes. Filament yarn is mainly finished appearance flaws, the amount of wool yarn into a tube directly affects the quality and grade of the yarn . Fine determine the length of a long winding yarn in the subsequent course of the process can reduce the residual lint discarded, reduce waste , to bring good economic benefits. In this paper, the existing home and abroad and filament winding length detection apparatus depth detailed comparison and analysis, based on the combination of the actual situation of the factory , we propose a network in viscose filament yarn process in real time detection wool yarn , the yarn winding process to determine its precise length of the research methods , developed an online real-time capable to detect and precisely controlled filament yarn winding length of the system devices. Herein filament detected by non-contact optical detection method , to design and optimize the distribution of receiving phototransistor array form . The method is to use a laser irradiation viscose filament yarn , with a regular array of optical sensors for receiving scattered light . With radial bristles formed when bright light is to capture the phototransistor , and then outputs a weak signal , after the follow-up circuit and the signal processing chip systems , detection of the presence of the wool yarn , and outputs a switch , alarm and shutdown control . Length coning used the indirect counting method grooved and for the old-fashioned self- winding device has been transformed. In this method, the number of ring counter circuit based on the system using STC89C52RD microcontroller as the main controller, through the photoelectric conversion circuit , a signal processing circuit, a counter measuring circuit disconnection processing circuit , the keyboard display circuit . Grooved by counting the number of rotations , the experimental results and mathematical derivation and winding yarn length relationship between the number of rotations , the numeric conversion calculations and software programming, directly driven by the microcontroller digital display of the length of the yarn winding . After the actual laboratory testing, the results show that the system is stable and reliable , low cost and small size, to achieve the desired design goals.

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CLC: > Industrial Technology > Light industry,handicrafts > Textile industry,dyeing and finishing industry > General issues > Standards and testing of textiles
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