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Development of Key Components for NIR Grating Spectrometer in Grain Quality Detector

Author: ZhangYinQiao
Tutor: ZhangXiaoChao
School: China Agricultural Mechanization Sciences
Course: Mechanical Design and Theory
Keywords: Near-infrared grating spectrometer Grain quality CCD Light source control Temperature control
CLC: TH744.1
Type: Master's thesis
Year: 2009
Downloads: 139
Quote: 2
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Abstract


China is a large agricultural country , the development of agriculture is the basis of national development and social stability . The quality of agricultural products will help guide the rapid detection of agricultural products from the \Near Infrared Spectroscopy with fast , accurate, reproducible , environmental pollution and other characteristics of the technology of choice for quality inspection of agricultural products . This paper is a combination of the Eleventh Five-Year \and development work . main findings are as follows : 1 , fixed grating and charge-coupled device (CCD) - based near-infrared spectrometer works , developed on the basis of a linear CCD drive circuit spectrum signal acquisition circuit 2 , developed a microcontroller - based control of near-infrared light source , the light source control accuracy to meet the requirements of the light source of the spectrometer . achieve the cooling function of the CCD , to ensure the stability of the CCD . complete sample rotating stage control system design 3 , the software part of the lower computer program and host computer program of temperature control and light source control , preservation and analysis of the spectral data processing . spectroscopy to study the spectrum of the first derivative , wavelet transform filtering, partial least squares method ( PLS ) etc. 4 wheat samples related experiments , testing the stability and accuracy of the rapid detection of near-infrared grain quality , and to verify the feasibility of near infrared spectrometer for the detection of the grain quality . 5 , with BRUKER company MPA Comparative Experiment spectrometer described spectrometer we developed contrast exists on the detection accuracy of a certain gap. reasons , one is on the measurement principle , the Fourier spectrometer accuracy has advantages ; second is the critical components of the instrument big gap between the performance in comparison with foreign ; Third is in the processing technology , there are also a large gap also , we have developed a spectrometer to meet certain needs of practical application , and have a great advantage in terms of cost .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Optical instruments > Physical optical instruments > Spectrometers
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