發(fā)布時(shí)間：2018-04-02 07:02

  本文選題：寒富蘋果　切入點(diǎn)：糖度　出處：《沈陽農(nóng)業(yè)大學(xué)》2017年碩士論文

【摘要】：水果的品質(zhì)檢測(cè)目前還停留在傳統(tǒng)的化學(xué)方法上,過程繁瑣,耗時(shí)費(fèi)力。本研究來源于寒富蘋果內(nèi)部品質(zhì)快速無損檢測(cè)系統(tǒng)的研究與開發(fā)項(xiàng)目(沈陽市科技攻關(guān)項(xiàng)目F11-123-3-00)。本試驗(yàn)以ARM11處理器為核心,以鹵素?zé)艄庠春蚒SB2000+可見/近紅外光譜儀為光譜檢測(cè)平臺(tái),在ARM11內(nèi)嵌的WinCE6.0系統(tǒng)上,采用VS2005編程工具,設(shè)計(jì)出人性化的軟件系統(tǒng),將寒富蘋果的糖度值輸出到LCD觸摸屏上。以寒富蘋果樣本作為研究的對(duì)象,采取二階微分、多元散射校正、平滑等方法對(duì)光譜進(jìn)行預(yù)處理,選取485.01-900.71nm共1231個(gè)波長(zhǎng)點(diǎn)建立寒富蘋果糖度的偏最小二乘數(shù)學(xué)模型。實(shí)現(xiàn)了寒富蘋果品質(zhì)快速檢測(cè)。具體研究?jī)?nèi)容及取得的主要成果如下:(1)闡述了本課題研究的背景及其意義,分析了國(guó)內(nèi)外研究現(xiàn)狀。闡明了便攜式無損檢測(cè)開發(fā)的現(xiàn)實(shí)意義,確定了本研究基于近紅外光譜檢測(cè)技術(shù)和嵌入式技術(shù)進(jìn)行便攜式無損檢測(cè)系統(tǒng)設(shè)計(jì)開發(fā)的研究技術(shù)路線與方案。(2)分析了無損檢測(cè)系統(tǒng)軟、硬件設(shè)計(jì)基礎(chǔ)理論。在對(duì)比分析ARM11處理器與S3C6410的處理器的特性的基礎(chǔ)上,確定了近紅外光譜技術(shù)的分析檢測(cè)流程和化學(xué)計(jì)量學(xué)中對(duì)光譜原始數(shù)據(jù)的預(yù)處理方法和偏最小二乘建模方法,提出了對(duì)建立的模型進(jìn)行評(píng)價(jià)的數(shù)學(xué)指標(biāo)。介紹了 WinCE6.0的結(jié)構(gòu)和特點(diǎn),分析了 WinCE6.0的構(gòu)成,包括硬件層、OEM層、操作系統(tǒng)層和應(yīng)用層。并對(duì)幾種常見的操作系統(tǒng)的優(yōu)劣進(jìn)行了對(duì)比,最終選擇微軟公司的WinCE6.0系統(tǒng)做為ARM11的操作系統(tǒng)。(3)設(shè)計(jì)了便攜式無損檢測(cè)的硬件系統(tǒng)。通過對(duì)比研究各部件的參數(shù),確定了硬件系統(tǒng)的基本構(gòu)成,硬件系統(tǒng)主要有USB2000+可見/近紅外光譜儀、嵌入式處理控制單元、鹵素?zé)艄庠�、電�?光纖探頭等構(gòu)成。其中ARM嵌入式處理控制單元主要完成數(shù)據(jù)的處理和人機(jī)交互,光譜儀用來對(duì)蘋果的光譜反射率信息進(jìn)行采集,電源為ARM11處理器、散熱器和光源供電。根據(jù)各個(gè)部件的尺寸和功能需求設(shè)計(jì)了整個(gè)機(jī)體的外殼部分。并設(shè)計(jì)了便攜式農(nóng)產(chǎn)品檢測(cè)電源系統(tǒng)。實(shí)現(xiàn)了硬件設(shè)備的小型化、便攜化。(4)設(shè)計(jì)了便攜式無損檢測(cè)的軟件系統(tǒng),在ARM11內(nèi)嵌的WinCE6.0系統(tǒng)上,采用VS2005編程工具,設(shè)計(jì)出人性化的軟件系統(tǒng),對(duì)光譜儀參數(shù)進(jìn)行設(shè)置、采集暗光譜、去除暗光譜、存儲(chǔ)參考光譜、采集和保存蘋果樣品光譜數(shù)據(jù),并與事先載入的糖度模型進(jìn)行運(yùn)算,并在屏幕上顯示出檢測(cè)結(jié)果,實(shí)現(xiàn)了檢測(cè)結(jié)果的即時(shí)化顯示。(5)寒富蘋果的糖度無損檢測(cè)數(shù)學(xué)模型的建立與試驗(yàn)分析。采取二階微分、多元散射校正、平滑等方法對(duì)光譜進(jìn)行預(yù)處理,選取485.01-900.71nm共1231個(gè)波長(zhǎng)點(diǎn)建立寒富蘋果糖度的偏最小二乘數(shù)學(xué)模型。預(yù)測(cè)模型決定系數(shù)R2=0.9852。并選取100個(gè)寒富蘋果進(jìn)行了試驗(yàn)驗(yàn)證,表明該系統(tǒng)能很好地滿足寒富蘋果糖度的無損檢測(cè)要求,為寒富蘋果產(chǎn)中和產(chǎn)后的品質(zhì)管理提供數(shù)據(jù)支撐。此外該系統(tǒng),可以將經(jīng)過試驗(yàn)研究得到的不同品種的果蔬糖度、酸度、色度(L*,A*,B*)模型導(dǎo)入該檢測(cè)系統(tǒng),實(shí)現(xiàn)不同品種果蔬多品質(zhì)參數(shù)的同時(shí)檢測(cè)。
[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.

【學(xué)位授予單位】：沈陽農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP311.52;S661.1
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本文編號(hào)：1699279