便携式寒富苹果品质快速无损检测系统设计

发布时间：2018-04-02 07:02

  本文选题：寒富苹果　切入点：糖度　出处：《沈阳农业大学》2017年硕士论文

【摘要】：水果的品质检测目前还停留在传统的化学方法上,过程繁琐,耗时费力。本研究来源于寒富苹果内部品质快速无损检测系统的研究与开发项目(沈阳市科技攻关项目F11-123-3-00)。本试验以ARM11处理器为核心,以卤素灯光源和USB2000+可见/近红外光谱仪为光谱检测平台,在ARM11内嵌的WinCE6.0系统上,采用VS2005编程工具,设计出人性化的软件系统,将寒富苹果的糖度值输出到LCD触摸屏上。以寒富苹果样本作为研究的对象,采取二阶微分、多元散射校正、平滑等方法对光谱进行预处理,选取485.01-900.71nm共1231个波长点建立寒富苹果糖度的偏最小二乘数学模型。实现了寒富苹果品质快速检测。具体研究内容及取得的主要成果如下:(1)阐述了本课题研究的背景及其意义,分析了国内外研究现状。阐明了便携式无损检测开发的现实意义,确定了本研究基于近红外光谱检测技术和嵌入式技术进行便携式无损检测系统设计开发的研究技术路线与方案。(2)分析了无损检测系统软、硬件设计基础理论。在对比分析ARM11处理器与S3C6410的处理器的特性的基础上,确定了近红外光谱技术的分析检测流程和化学计量学中对光谱原始数据的预处理方法和偏最小二乘建模方法,提出了对建立的模型进行评价的数学指标。介绍了 WinCE6.0的结构和特点,分析了 WinCE6.0的构成,包括硬件层、OEM层、操作系统层和应用层。并对几种常见的操作系统的优劣进行了对比,最终选择微软公司的WinCE6.0系统做为ARM11的操作系统。(3)设计了便携式无损检测的硬件系统。通过对比研究各部件的参数,确定了硬件系统的基本构成,硬件系统主要有USB2000+可见/近红外光谱仪、嵌入式处理控制单元、卤素灯光源、电源,光纤探头等构成。其中ARM嵌入式处理控制单元主要完成数据的处理和人机交互,光谱仪用来对苹果的光谱反射率信息进行采集,电源为ARM11处理器、散热器和光源供电。根据各个部件的尺寸和功能需求设计了整个机体的外壳部分。并设计了便携式农产品检测电源系统。实现了硬件设备的小型化、便携化。(4)设计了便携式无损检测的软件系统,在ARM11内嵌的WinCE6.0系统上,采用VS2005编程工具,设计出人性化的软件系统,对光谱仪参数进行设置、采集暗光谱、去除暗光谱、存储参考光谱、采集和保存苹果样品光谱数据,并与事先载入的糖度模型进行运算,并在屏幕上显示出检测结果,实现了检测结果的即时化显示。(5)寒富苹果的糖度无损检测数学模型的建立与试验分析。采取二阶微分、多元散射校正、平滑等方法对光谱进行预处理,选取485.01-900.71nm共1231个波长点建立寒富苹果糖度的偏最小二乘数学模型。预测模型决定系数R2=0.9852。并选取100个寒富苹果进行了试验验证,表明该系统能很好地满足寒富苹果糖度的无损检测要求,为寒富苹果产中和产后的品质管理提供数据支撑。此外该系统,可以将经过试验研究得到的不同品种的果蔬糖度、酸度、色度(L*,A*,B*)模型导入该检测系统,实现不同品种果蔬多品质参数的同时检测。
[Abstract]:The quality detection of fruit is still stuck in the traditional chemical method, the process cumbersome, time-consuming and laborious. The research and development project of the study from Hanfu Apple internal quality nondestructive testing system (Shenyang city science and technology project F11-123-3-00). In this experiment, the ARM11 processor as the core, with a halogen lamp and visible / near USB2000+ infrared spectrum detection platform, ARM11 embedded in the WinCE6.0 system, using VS2005 programming tools, the design of software system of humanity, the Hanfu apple Brix value output to the LCD touch screen. The apple samples as the object of study, take the two order differential, multiple scattering correction, smoothing etc. methods the spectra were preprocessed, selected 485.01-900.71nm a total of 1231 wavelength points established partial least squares model of Hanfu apple sugar content. To achieve rapid detection of Hanfu apple specific research quality. The main contents and results are as follows: (1) describes the background and significance of the research, analyzes the research status at home and abroad. To clarify the practical significance of the development of portable testing, determined based on the portable testing system design and development of technical route and scheme of near infrared spectrum detection technology and embedded technology.. (2) analysis of the nondestructive testing system software, hardware based design theory. Based on comparative analysis of characteristics of ARM11 processor and S3C6410 processor on the analysis to determine the testing process and stoichiometry of near infrared spectroscopy in the spectral data preprocessing method and partial least squares modeling method, puts forward a mathematical evaluation index to establish the model. This paper introduces the structure and characteristics of WinCE6.0, analyzes the structure of WinCE6.0, including hardware layer, operating system layer and the OEM layer. Application layer. Compared to common operating system and the advantages and disadvantages of the final selection of WinCE6.0 system of Microsoft Corp as the operating system of ARM11. (3) the design of portable non-destructive detection hardware system. By comparing the parameters of each component, determine the basic structure of the hardware system, the hardware system consists of USB2000+ / visible near infrared spectroscopy, embedded processing control unit, a halogen lamp, power supply, optical fiber probe components. The ARM embedded control unit mainly complete data processing and human-computer interaction, for Apple spectrometer spectral reflectance information collection, power supply for the ARM11 processor, the radiator and the light source power supply. According to the demand of the size and function of each component the shell part of the body design. And the design of the portable detection of agricultural products supply system. To achieve the miniaturization of hardware devices (portable. 4) design of the portable testing software system, ARM11 embedded in the WinCE6.0 system, using VS2005 programming tools, the design of software system of humanity, to set the spectrometer parameters acquisition, dark spectrum, remove dark spectrum, memory reference spectra, collection and preservation of Apple sample spectral data, and calculate and sugar the load model in advance, and shows the test results on the screen, the detection results of real-time display. (5) of Hanfu apple sugar nondestructive testing to establish the mathematical model and experimental analysis. Taking the two order differential, multiple scattering correction, smoothing method to preprocess the spectrum, select 485.01-900.71nm 1231 wavelength points established partial least squares model of Hanfu apple sugar content. The coefficient of determination R2=0.9852. prediction model and selects 100 Apple test shows that this system can well meet the Nondestructive testing requirements of Hanfu apple sugar content, to provide data support for the quality management of Hanfu apple production and post production. In addition the system can be obtained through the experiment of different varieties of fruit sugar, acidity, chroma (L*, A*, B*) model into the detection system, detection of different varieties of fruits and vegetables more the quality parameters at the same time.

【学位授予单位】：沈阳农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP311.52;S661.1
，

本文编号：1699279