水果内部品质在线近红外分光检测装置及试验

阐述了近红外分光法检测水果内部品质的基本原理和检测流程，分析比较了在线式反射光测定法、不完全遮光型透过光测定法和完全遮光型透过光测定法的特点；以柑橘和苹果为检测对象，用完全遮光型透过光水果内部品质测定装置进行在线糖度、酸度及内部褐变等检测试验，并与常规分析法测定结果进行回归分析。结果表明，在线检测的糖度值与实测值的相关系数在0.95以上，酸度相关系数大于0.85，且能检测内部缺陷，完全满足在线检测水果内部品质的要求。

Detecting Device for on-Line Detection of Internal Quality of Fruits Using Near-Infrared Spectroscopy and the Related Experiments

The basic principles and detecting flow in fruit internal quality detecting process were explained by the near-infrared spectroscopy. The three measuring methods, i.e. the on-line reflex, the partially shaded light transmission and the fully shaded light transmission, were analyzed and compared. Oranges and apples served as detected objects, the experiments on on-line sugar degree, acidity, internal brown change were undertaken by a fully shaded light transmission detecting device. Also, it provided a recession analyses based on the results of conventional analysis. The results showed that the correlation coefficiect between the actual value and detected value on-line is over 0.95,and the correlation coefficiect of acidity is over 0.85. The method of fully shaded light transmission can detect internal defect and quaily of fruit on-line.