糸の残りパターンを利用した糸残量非接触計測(機械力学,計測,自動制御)

抄録

The research was carried out on the method for detecting a prior condition that there is no thread on the bobbin. When the thread on the bobbin decreases, it was found that the specific rest pattern of the thread appears. And, it was proven that the reflectivity greatly differed in the thread and the bobbin by the experiment. Using these two experimental facts, the equipment of the noncontact type which outputs the stop signal with sewing machine stopping was developed, when the thread of the sewing machine becomes little. Developed equipment was installed in the sewing machine, and its tests were carried out. When the specific pattern of the remained thread appears and the thread width becomes 3mm, the stop signal has been rightly output from developed equipment. From this fact, it was confirmed that developed noncontact type equipment for measuring the remained thread normally operated, and it was clarified that proposing measurement principle was effective.