生丝细度测量光学成像系统设计

为实现巢丝现场对生丝细度测量的需求,设计一种具有非接触性、动态检测、高精度、准确率高、并且能与其他自动控制设备相连的专用光电测量仪。针对生丝细度测量现有技术的不足和造成误差的成因,利用线阵CCD,结合计算机技术构建了一种基于线阵CCD光电传感器的非接触式实时动态检测生丝细度的设计方案。方案分析了现有检测方法存在的问题,对光学成像系统的光源和成像部分完成了理论设计,使扩束准直系统的折射角理论上达到0.00111°。设计方案中CCD获得暗背景接收信号,有效避免传统亮背景成像引起的像元饱和现象及生丝抖动引起的失真。新结构解决了光源照度的不稳定性和生丝透明度造成的影响,使之成为一种较为实用的方法。

Design of optical imaging system measuring the fineness of a raw silk

To meet measurement requirements of raw silk fineness at silk nest site,a special electro-optical measuring instrument is designed with the advantages of non-contact measurement,dynamic testing,precision,high accuracy;it can connect to other automatic controller.Now as there are some inadequacies and errors of raw silk fineness measurement in present technology.A kind of plan of contactless,real-time and dynamic raw silk diameter measurement based on linear CCD array,combined with computer technology is designed.The paper analyzes the problems in existing detecting methods.including the theoretical design of a light source and an imaging part,making beam expander collimator system＇s expand beam collimated system＇s refraction angle reach to 0.0011°.The new structure makes the CCD receive signal in dark background,avoid pixel saturation and distortion caused by raw silk shaking in bright background.The structure provides a perfect solution to the impact of instability of light illumination and transparency of raw silk,which makes it a more practical example.