轧辊磨损度光纤在线检测系统

Study on optical fiber on-line measurement system for roller wears

基于反射光强与位移在一定范围内成正比的原理,提出了用反射式光纤传感器对轧辊磨损度进行非接触式在线检测的方法.通过对轧辊表面反射光强变化的精确测量,将轧辊磨损度转化为与光强成线性关系的位移来测量.提出采用一种新型等间距三光纤探头的测量方法,可以自动消除光源不稳定、反射体表面反射率不同,以及光纤传播中的本征损耗和弯曲损耗产生的误差.实验结果表明,该系统测量范围为0～1.5mm,分辨率为1μm,精确度可达到0.1%.系统具有非接触、不受电磁干扰、结构简单、高稳定性在线检测的特点.

Based on the principle that reflected light intensity is proportion to the distance in some extent, a non-touch on-line optical fiber measurement for roller wears is presented. By testing the reflected light intensity of the roller＇s surface precisely, the roller wears can be measured in distance, which has linear relationship with light intensity. By using a novel probe of three optical fibers in equal transverse space, the effects of fluctuations in the light source, reflective changing of target surface and the intensity losses in the fiber lines are automatically compensated. By discussing in theory and experiment, the measuring range is from 0 to 1.5mm, the resolution is 1 μm and the precision can reach 0.1%. This system offers such advantages as non-touch, no electromagnetic interference, simple construction and stability.