非接触式断纱检测系统设计

Design of non-contact yarn break detection system

针对机械式断纱检测装置容易被飞絮、油污卡死及摩擦引起纱线磨损等缺点,设计了一种基于光电传感式的非接触式断纱检测系统。采用红外传感的方式,将纱线运动信号转化为电信号,通过示波器测量出感应区无纱线、纱线静止、纱线运动三种状态下的感知信号,并对其变化规律进行分析。结合纺织设备的工艺要求,总结了断纱判断依据,并设计了红外光电检测电路和信号分析处理系统。该断纱检测器采用通孔结构将纱线约束在感应区,有纱线经过的地方都可以安装,普适性较强。对完成的系统进行了试验,结果发现该系统可以准确地完成断线检测报警功能。

The mechanical broken yarn detecting device is easy to be stuck by oil or dust and cause yarn wear by friction.For these defects,a non-contact yarn break detection system based on photoelectric sensor was designed.The infrared sensing method was used to transform the yarn movement signal into electrical signal.Electrical signals in three states of induction zone without yarn,static yarn and yarn movement were measured through the oscilloscope,and the variation law was analyzed.Combined with the technological requirements of textile equipment,the judgment basis of broken yarn was summarized.The infrared photoelectric detection circuit and signal analysis and processing system were designed.The yarn break detector adopted two through holes to restrict the yarn into the induction zone,and the detector can be arranged in the place where the yarn passes,so its adaptability is stronger.The system test result shows that the system can accurately complete yarn break detection and warning function.