压电晶体传感器阵列判别分析小分子脂肪醇蒸气

Discriminant Analysis of Vapour of Aliphatic Alcohol with Small molecule by Array of Piezoelectric Crystal Sensors

选用８个不同材料涂层压电石英晶体组成传感器阵列，所获频移数据用逐步判别（ＳＤＡ）法解析，对小分子脂肪醇类与非醇类溶剂蒸气用二类判别法分析，找到由少于８个传感器组成阵列可达最佳判别能力，训练集回测正确率平均为８４．８％，预测集识别正确率平均为８７．３％。此外，该阵列用于识别酒、饮料，结果较佳。

A sensor array composed of 8 piezoelectric quartz crystals coated respectively with different materials,the frequency shift data obtained were analyzed by stepwise discriminant analysis(SDA),for vapour of aliphatic alcohol with small molecule discriminant analysis was adopted. The average identification rate of the training set and the predicted set was 84.8%and 87.3%respectively,Moreover,the array had been used to identify spirit and beverages.