摘要：近年来，随着牛奶行业规模不断扩大，牛奶食品安全问题也暴露出来。根据我国乳制品行业的有关要求，乳制品生产加工企业必须提供牛乳主要成分—蛋白质和脂肪的分析值信息。本设计是基于光电检测系统的牛乳成分检测，首先将激光器分别沿着水平与垂直方向照射在被测牛乳上，利用蛋白质和脂肪对光的散射与投射的比值来计算蛋白质和脂肪的含量，即激光散透比原理。然后由硅光电池作为光电传感器件，将采集的光强比值信息转化为电压信号，经放大电路放大处理后传输给AD转换器，转换成数字信息，再经过AT89C51RD2系统控制电路存储处理，最终将结果通过显示装置显示出来，即具体的蛋白质和脂肪含量。66641

毕业论文关键词：光电检测,牛乳成分,散透比

Abstract: In recent years, along with expanding the milk industry, milk, food safety issues are exposed. According to the requirements of China's dairy industry, dairy production and processing enterprises must provide the main component of milk - protein and fat analysis value information. The design is based milk component detection photoelectric detection system, first lasers were irradiated along a horizontal and vertical direction in the measured milk, scattering and projected utilization ratio of protein and fat content of light to calculate the protein and fat, that is rate between scattered light and transmitted light. And then by the silicon photo cell as a photoelectric sensor element, the collected light intensity ratio of the information into a voltage signal, transmitted to the AD converter after amplifying circuit amplifying processing, converted into digital information, and then through AT89C51RD2 system control circuit stores processing, the final result displayed by the display device, i.e. the specific protein and fat content.

Keywords:Photoelectric detection,milk constituents,rate between scattered light and transmitted light

目录

1 绪论 3

1.1 选题背景及研究意义 4

1.2 光电检测技术的发展 5

1.3 牛乳成分检测方法 5

1.4 课题主要研究内容 7

2 牛乳成分参数检测研究 7

2.1 牛乳成分参数检测方法及其可行性 7

2.2 牛乳成分参数检测方式 8

2.3 牛乳成分参数检测与食品安全 8

3 牛乳成分检测参数检测装置设计 8

3.2 光电检测单元设计 9

3.2.1 光电传感器选型 9

3.2.2 前置放大电路设计 9

3.3 模数转换电路设计 10

3.3.1 模数转换器选型 10

3.3.2 模数转换器的电路设计 11

3.4 系统控制模块设计 12

3.5 LCD显示单元设计 12

3.5.1 LCD显示选型 12

3.5.2 LCD显示硬件电路 13

3.6 系统电源设计 13

4 软件设计 14

4.1 系统软件描述 14

4.2 系统软件的功能模块 14

4.2.1 主程序设计流程