光电式环锭断纱在线检测系统

针对环锭纺纱生产过程中断纱难以及时发现的问题，依据光反射原理，对高速转动的环锭细纱机钢丝圈进行监测。钢丝圈转动引起反射光强度变化，并由光敏管接收产生初始电信号，信号经由外围电路处理为适合单片机检测的方波信号。单片机软件部分对信号统计，当统计值低于预设值时，认为钢丝圈转动停止，发生断纱行为。在上海二纺机EJM128K细纱机上试纺18.2 tex纯棉细纱，采用光电式环锭细纱断纱在线检测系统对断纱进行实时监测，并对纺纱各阶段各位置的钢丝圈信号波形采样。实验结果表明系统成功将钢丝圈旋转信号转换成电信号，能够实现断纱检测，对故障锭位进行报警提示。

On-line detecting system based on optoelectronic technology forring spun-yarn breakage

For the problem that yarn breakage can not be found in time during the spinning process, this paper proposes a method to monitor the traveler of the spinning frame, which is following the light reflex rule. The traveler’s rotation causes the change of reflected light intensity, which is received by photosensitive tube and converted into original electrical signal. The original electrical signal becomes square wave signal of being suitable for microcomputer detection after peripheral circuit. Microcomputer software calculates the number of square wave signal, when the statistic is less than the default the traveler is deemed hold-on and yarn breakage occurs. We Spun 18.2 tex cotton yarn with spinning frame-EJM128K and monitor yarn breakage with the proposed system. Taking some stages of the spinning process into consideration and making a series of signal sample of the traveler. The result shows that the proposed system can provide accurate detection and warning for yarn breakage position.