| 摘要 |
PROBLEM TO BE SOLVED: To provide a device capable of surely detecting an abnormality of the travel of filament yarn such as a skipping stitch in a non-contact manner. SOLUTION: The travel monitoring device 10 monitors the travel of both a needle thread 14a and a bobbin thread 14b used by a fiber machine 12. The device includes sensors 16a, 16b for the filament yarns 14a, 14b. The sensors 16a, 16b include light sources 18a, 18b and differential space filter elements 20a, 20b, respectively. A differential output of the first sensor 16a and a differential output of the second sensor 16b are inputted into a signal processing circuit 26 for determining whether the filament yarns 14a, 14b travel or not, and processed. COPYRIGHT: (C)2010,JPO&INPIT |
