近红外光谱分析在糖溶液浓度测量中的应用

Application of near-infrared spectrum analysis to measure sugar liquid concentration

提出了一种使用近红外光谱分析技术测量梨果肉溶液浓度的新方法。采用一种间接的相对分析方法,通过大量的实验建立了糖溶液光谱图与其质量参数之间的关系模型库.通过与该关系模型库的对比,可以精确得到不同浓度糖溶液的真实值。系统使用白光作为光源,分析对比了不同浓度糖溶液光谱图,波峰值在1 406nm左右。实验结果表明,测量值与标准值十分相符,浓度分辨率为0.05%,绝对误差仅为0.002%。

A new method to measure pear fleshes liquid concentration using near-infrared spectrum analysis is presented. Using an indirect relative analysis method and through a lot of experiments we established the base model of the relationship between sugar solution spectra and its quality parameters. Based on the base model, we accurately obtained different concentrations of sugar solution. The source used is a stabilized white light, which gives different wavelengths. An experiment was conducted to monitor changes in spectra of sugar solution. The transmission peak was identified at 1 406 nm. Experimental results show that the measured value and the true value very consistent. The measurement sensitivity can be 0.05%, and absolute error is 0. 002%.