基于光源调制的扫描式镀膜玻璃色差检测方法

摘要

In order to realize automatic color-difference measurement for coated glass,a scanning color-difference measurement system was established.Based on the colorimetric theory and combined with the production process of glass industry,a spectroscopy scanning color-difference measurement system was designed and applied to online color-difference detection for coated glass.The principle and method of online color-difference measurement was described,and the technologies of light source modulation and sig-nal demodulation synchronization were introduced into the system,which improved jamming-rejection capability of the system and greatly reduced the impact of background noise interference on the measurement results.The experimental results show that the anti-interference method allows relatively smooth curve of the experiments,and peak-peak value is significantly decreased from 1.0 to 0.4,which meets the demands of practical color-difference testing.The method is proved to be feasible and provides reference for online color measurement with high-accuracy and quality control.%为了实现对镀膜玻璃色差的自动测量，建立了色差扫描测量系统。根据色度学理论并结合实际镀膜玻璃工业的生产过程，提出扫描式光谱测色法，用于镀膜玻璃颜色差异的在线检测。阐述了在线色差检测原理与方法，引入光源调制和信号同步解调技术，提高了系统的抗干扰能力。极大地改善了外界光干扰等背景噪声对测量结果的影响。对比实验表明：该抗干扰设计方法可以使实际色差变化曲线相对平滑，峰峰值由1．0变为0．4，能够满足实际色差控制的需要，证明了方法的可行性，为实现高精度的在线颜色测试与品质控制提供参考。