温度对液滴指纹图水质识别的影响分析  

The Impact Analysis of Temperature on the Identification of Water Applying Liquid Drop Fingerprint

作　　者：冯国红[1,2] 裘祖荣[1] 廖和琴[1] 

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072 [2]东北林业大学工程技术学院,哈尔滨150040

出　　处：《传感技术学报》2012年第4期457-461,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(51005165/E051102)

摘　　要：研究水本身温度和环境温度的变化对液滴指纹图产生的影响,可为液滴分析仪仪器化设计提供参考。在环境温度保持在27℃左右时,对注射器中水的温度由57℃降至31.3℃期间,连续采集了16组液滴指纹图,比较各组液滴指纹图,光纤信号和电容信号的最大变化分别为0.17%和1.23%,与系统误差相当,说明水本身温度对液滴指纹图几乎无影响;以纯水在不同温度下的折射率、表面张力和介电常数值,计算了环境温度对纯水液滴测量信号的影响大小,计算结果表明:环境温度由18℃升至30℃时,光纤信号和电容信号的变化分别为0.64%和3%,对电容信号的影响较大。The research of water itself temperature＇ and environmental temperature＇ changes to the liquid droplet fingerprint provides a reference for the droplet analyzer instrumentation. During the period of experiment, the envi- ronmental temperature kept unchanged at about 27 ℃, while the temperature of the water in the syringe dropped from 57 ℃ to 31.3 ℃, we continuously collected 16 groups of LDFand compared the data eath other, that the maximum change of optical fiber signal were 0.17% and capacitance signal get 1.23 % respectively, that is equal to the systematic error,which indicates water itself temperature has almost no influence on the LDF. Using refractive index, surface tension and dielectric constant value of water in different temperature, we calculated how the environmental temperature effects on pure water measuring signal, and the results show that, environment temperature increasing from 18 ℃to 30 ℃C ,the change of optical fiber signal and capacitance signal were 0.64% and 3 % respectively, a significant impact on the capacitance signal.

关 键 词：水质识别 温度的影响 液滴指纹图 光纤信号 电容信号 

分 类 号：TP273.6[自动化与计算机技术—检测技术与自动化装置] TP206.1[自动化与计算机技术—控制科学与工程]