On-line detection of defects in fibrous members

An on-line thickness defect detection system (30) for detecting a thickness defect (31a) in a fibrous member (31), such as textile yarns produced from a spinning machine, and related processes are disclosed. The thickness defect detection system (30) includes first and second fiber contacting members (32, 34) where at least one of the contacting members (32, 34) is shiftable relative to the other contacting member (32, 34). Thickness defect monitoring is done by biased the contacting members (32, 34) towards each other and against the running fibrous member (31) and measuring variations of the distance between the contacting members (32, 34) using an accelerometer. 公开了种在线厚度缺陷检测系统（30）和相关过程，所述在线厚度缺陷检测系统（30）用于检测纤维构件（31）诸如由纺纱机生产的纺织纱线中的厚度缺陷（31a）。所述厚度缺陷检测系统（30）包括第纤维接触构件（32）和第二纤维接触构件（34），其中，所述接触构件（32、34）中的至少个可相对于其它接触构件（32、34）移位。厚度检测监测是通过如下方式完成的：使所述接触构件（32、34）朝着彼此且抵靠正在行进的纤维构件（31）偏置，并且使用加速计来测量所述接触构件（32、34）之间的距离的变化。