2026-03-08T03:50:55Z https://kanazawa-u.repo.nii.ac.jp/oai

oai:kanazawa-u.repo.nii.ac.jp:00043594 2024-06-20T06:38:31Z 934:935:936

圧力変化を利用した糸の管通過検出 Detection of Yarn Passage by Air Pressure Variation in a Pipe Hatta, Kiyoshi Kinari, Toshiyasu Shintaku, Sukenori 八田, 潔 73530 喜成, 年泰 71381 90195321 新宅, 救徳 71392 90019761 The yarn detecting system is developed using the air pressure variation caused by a yarn running through a pipe. The optimum detecting conditions for several kinds of yarns are examined. The processing technique is also investigated to judge a yarn passing through a pipe at higher degree of accuracy. The system is composed of a yarn detecting block, a pressure sensor and a personal computer. It can stably detect even 20 D spandex yarn that was impossible to be detected. Results obtained are as follows : (1) Pressure variation increases with the area which a yarn occupies in a pipe. For example, larger pressure variations are observed when a yarn has larger diameter, more filaments separate and a yarn has more fuzz.Spandex yarn which has large flexibility shows much larger pressure variation because it flows into a branch pipe. It also shows larger pressure oscillation caused by its extension and/or compression. (2) The supplied pressure to an ejector has little effect on the pressure variation except for a spandex yarn. The pressure variations are also emphasized when a branch pipe is tilted in the yarn entrance direction. (3) Pressure variations must be distinguished from the oscillations of the air flow in a pipe, because the pressure variation caused by a yarn passing through a pipe is very small. In the yarn detecting system, low-pass filter circuits and average processing with a personal computer are useful for increasing the accuracy to judge a yarn passing through a pipe. 出版社照会後に全文公開 金沢大学理工研究域機械工学系 journal article 日本繊維機械学会 = Textile Machinery Society of Japan 1999 VoR application/pdf 繊維機械学会誌 12 52 T291 T301 Journal of the Textile Machinery Society of Japan AN00285892 0371-0580 https://kanazawa-u.repo.nii.ac.jp/record/43594/files/TE-PR-KINARI-T-T291.pdf https://doi.org/10.24517/00049936 http://hdl.handle.net/2297/00049936 https://kanazawa-u.repo.nii.ac.jp/records/43594 jpn 10.4188/transjtmsj.52.12_T291 https://www.jstage.jst.go.jp/browse/transjtmsj/-char/ja/ https://www.jstage.jst.go.jp/browse/transjtmsj/-char/ja/ http://tmsj.or.jp/ http://tmsj.or.jp/ Copyright © 日本繊維機械学会 Textile Machinery Society of Japan