智能数显折光仪的研究与开发

发布时间：2018-04-08 11:56

本文选题：折光仪　切入点：全反射　出处：《上海工程技术大学》2015年硕士论文

【摘要】：折射率是透明、半透明材料的一个重要特性参数,折射率测量被广泛应用于食品、制糖、石油、化工、环保等领域,以及眼镜、珠宝鉴定行业。传统阿贝折射仪由于其纯光学机械结构的原因,无法满足当前工业技术对精度和效率的要求。市场上引进的数字式折射率测量产品,大多光学结构设计复杂,价格昂贵,最大的缺陷是不能兼测固、液体材料的折射率,不能满足市场的广大需求。本文以工业自动化生产为应用背景,以高精度、自动快速测量为目的,研发一种基于线阵CCD图像传感器,能兼测固、液体材料折射率的智能数显折光仪。按照光的全反射原理,以等腰梯形折射棱镜为棱镜主体,采用线阵CCD图像传感器取代目视观察,根据量程和分辨率,分析、设计了仪器的光学系统。采用单色光源以避免被测材料色散的影响。采用线阵CCD图像传感器检测明暗分界线的位置,提高了仪器的测量精度和自动化程度。以高性能微处理器C8051F060为核心,设计了整机的硬件电路,对所用各相关器件进行了选型,采用Altium Designer完成了硬件电路原理图的绘制与PCB板的布局。采用C语言编程,设计了仪器的软件系统,包括控制软件和图像处理软件。进行整机软硬件调试,可完成预定的各项功能。对仪器原理样机进行测试实验。实验结果表明光学系统设计总体合理,硬件电路符合要求,人机界面使用方便,可对透明及半透明固体材料和液体材料进行折射率测量,有着良好开发和应用前景。
[Abstract]:Refractive index is an important characteristic parameter of transparent and translucent materials. Refractive index measurement is widely used in food, sugar, petroleum, chemical, environmental protection and other fields, as well as glasses, jewelry identification industry.Because of its pure optical mechanical structure, the traditional Abbe refractometer can not meet the requirements of precision and efficiency of current industrial technology.Most of the digital refractive index measurement products introduced in the market are complicated in design and expensive in price. The biggest defect is that the refractive index of liquid materials can not be simultaneously measured and the refractive index of liquid materials can not meet the broad demand of the market.In this paper, an intelligent digital display refractometer based on linear CCD image sensor, which can measure both solid and refractive index of liquid materials, is developed for the purpose of high precision and automatic fast measurement.According to the principle of total reflection of light, the isosceles trapezoidal refraction prism is used as the main prism, and the linear array CCD image sensor is used to replace the visual observation. According to the range and resolution, the optical system of the instrument is designed.The monochromatic light source is used to avoid the influence of the dispersion of the measured material.Linear CCD image sensor is used to detect the position of light and dark boundary, which improves the precision and automation of the instrument.Based on the high performance microprocessor C8051F060, the hardware circuit of the whole machine is designed, and the related devices are selected. The schematic drawing of the hardware circuit and the layout of the PCB board are completed by using Altium Designer.The software system of the instrument is designed with C language, including control software and image processing software.Carry on the whole machine hardware and software debugging, can complete the scheduled functions.The instrument principle prototype is tested and tested.The experimental results show that the optical system design is reasonable, the hardware circuit meets the requirements, the man-machine interface is convenient to use, and the refractive index of transparent and semitransparent solid and liquid materials can be measured. It has a good prospect of development and application.
【学位授予单位】：上海工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH744

【参考文献】