动态分光测色仪硬件系统的研制
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摘要
在印染,纺织的等行业都涉及颜色学和颜色测量。颜色测量成为评价产品质量的重要依据和手段,这要求颜色测量能在人眼视察能力的基础上,满足工业中精度测量和控制颜色的需要,实现获得巨大的经济效益和社会效益的目的。本论文从光度学和色度学中有关光谱测量、颜色测量的理论出发,针对国内光谱测量应用的需要,在对可见光波段(400nm-700nm)的光谱信号同时探测,进行探讨和实验的基础上,研制开发用平面衍射光栅作为分光器件,线性硅光二极管阵列作为多通道光电转换器件,图形液晶显示屏显示测量数据和光谱图的快速光谱测量分析系统。它可以直接获得辐照度、光照度、色品和色温,操作十分简便。在这项开发中,作者所做的工作有:完成了整个系统控制电路板的软硬件的设计,并成功地完成了调试。从理论上探讨了分光系统的设计,对整个系统的误差进行了比较详细地分析,提出了用光叠加法来对系统进行线性校正的方法和步骤。并成功地用神经网络曲线拟合的功能,对整个系统的误差进行了修正。
Many trades including printing and dying and the textile industry are related to color and it's measurement. The measurement of color has become the important means of estimating the quality of product. So the color measurement should be based on the human's observing ability satisfy precise measurement and controlling of color to obtain huge economic benefit and social benefit. Starting from the theory relating to spectral measurement and color measurement in photometry and colourometry, aiming at the demand of spectral measurement and application at home, a fast spectral measuring and analyzing system has been successfully developed on the basis of investigations and experiments carried out for detection of spectral signal in visible and IR band(400~700 nm). The system uses plane diffraction grating as light splitting device and linear photodiode array as multi-channel photoelectric conversion device. It displays measured data and spectrogram with a pattern liquid crystal display screen. The system can directly obtain irradiance, light-illuminance, chroma and color temperature. Its operating is very convenient. During the development, the author designed the software and hardware of controlling circuit and debugged successfully. This thesis theoretically discussed the design of the light-splitting system and analyzed the error of system in detail. The method and steps of the light-accumulating were brought forward for linear correction and were applied successfully to the curve fitting by nerve network to correct the error.
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