文档介绍：沈阳理工大学
硕士学位论文
牛奶成分快速检测技术研究与系统设计
姓名:裴晓光
申请学位级别:硕士
专业:检测技术与自动化装置
指导教师:于洋
20100301
沈阳理工大学硕士学位论文
摘要
随着生活水平的提高,人们对牛奶的需求量不断增加,牛奶质量日益成为人
们关注的焦点,而牛奶成分的快速检测已成为食品安全领域的一个重要课题。本
文在总结目前现有牛奶成分检测方法的基础上,将光散射测量技术应用到牛奶成
分检测中,提出了一种快速检测牛奶成分的新方法。利用同时测量前向和侧斜向
散射光的方法,检测牛奶中主要粒子的浓度,从而确定牛奶中主要成分的含量。
本文首先分析了牛奶中的主要成分,并在此基础上,对光散射测量原理进行
了比较深入的研究,基于 Mie 散射理论,建立了散射测量牛奶中主要成分粒子浓度
的数学模型,论述了牛奶成分快速检测的原理。其次根据系统需求搭建了以 ARM9
D 为核心的牛奶成分快速检测硬件平台,并完成了基于 Windows CE 嵌入
式系统的牛奶成分快速检测系统的软件设计。最后对检测系统进行了调试,并对
其误差进行了分析。
在完成系统设计的基础上,对牛奶进行了大量测量实验。实验结果表明,采
用光散射测量方法,不仅可以对测量结果进行很好的物理解释,而且能对牛奶中
蛋白质和脂肪浓度进行快速检测。实验数据表明,其测量精度和重复性误差都小
于 4%,满足牛奶成分快速检测的精度要求。
关键词:牛奶成分,快速检测,光散射,Mie 散射理论
沈阳理工大学硕士学位论文
Abstract
With the improvement of the living standards, the demand for milk is increased,
while the quality of milk caused increasing people's attention, the rapid detection of
milk constituents in the fields of food safety has e an important issue. This paper
conclude the current milk ingredient detection methods, using the light scattering
measurement techniques to detect the milk constituents, propose a fast new method.
Using the measurement of forward and scattered light measurement method, To detect
the concentration of milk, the main particles in order to determine the content of main
components in milk.
This paper first analyzes the ponents of milk, and on this basis, deeply
study the principle of light scattering measurements. Upon the Mie scattering theory, set
up the mathematical model of the ponent and discuss the principle of the rapid
detection particle concentration in the milk ingredients. Second, according to the system
requirements, using ARM9 D build the core hardware platform of the rapid
detection of milk constituent; complete the software design of the milk ingredients rapid
detection system, based on Windows CE. Finally, debug the detection system, analyze
its errors.
Upon pletion of system design do a large number of meas