牛肉含水率无损快速检测系统研究  

Nondestructive Rapid Detection System for Water Content of Beef

作　　者：石力安[1,2] 郭辉[1,3] 彭彦昆[1,2] 江发潮[1,2] 林琬[1,2] 

机构地区：[1]中国农业大学工学院,北京100083 [2]国家农产品加工技术装备研发分中心,北京100083 [3]新疆农业大学机械交通学院,乌鲁木齐830052

出　　处：《农业机械学报》2015年第7期203-209,共7页Transactions of the Chinese Society for Agricultural Machinery

基　　金：公益性行业(农业)科研专项经费资助项目(201003008)

摘　　要：针对影响牛肉品质的主要指标,开发了基于可见/近红外光谱技术的牛肉含水率品质快速检测系统。阐述了该系统的工作原理、工作过程、硬件组成及软件系统功能。系统的核心是波段分别为400-960 nm和900-2 600 nm的光谱仪,结合控制器、光纤等辅助装置构成了检测系统的硬件部分。基于VC＋＋语言开发了Windows环境下的光谱信息采集和处理的快速无损检测软件。该系统可以实现对牛肉光谱数据的采集、处理、样品品质的快速预测和结果显示。该系统在实验室采集了57个牛肉背最长肌的光谱,分别对可见、近红外和全波段的光谱数据建模,分析显示全波段预测模型能够更好地预测牛肉的含水率,其校正相关系数RC和预测相关系数RP分别为0.96和0.88。然后将预测模型固化于在线检测硬件系统中,在牛肉分割线上采集84个样品进行实验验证,检测正确率为92.8%。含水率结果表明,该快速检测装置检测含水率的精度较高,可靠性较好,可用于牛肉屠宰分割线对含水率品质参数的快速无损检测。Moisture content is considered as an important evaluation index for beef quality. This study focused on development of nondestructive rapid detection system device for assessing beef quality based on VIS / NIR spectroscopy. Working principal and process of the system,hardware composition,and software were introduced. Hardware of detecting system included two spectrometers,handheld probe,control instrument,bifurcated optical fiber,power unit and container. Two spectrometers in the spectral region of 400 - 960 nm and 900 - 2 600 nm were coupled together for spectral acquisition. The wavelength range of visible and near infrared spectroscopy was covered and the characteristic wavelengths in VIS / NIR band of moisture,protein,fat and other main components of beef were detected by the two spectrometers. Another important part was probe. The handheld probe was designed with two optical channels in order to reduce the effect of light source on fiber probe. One channel was designed with angle of 45° for light source and the other one was designed to be vertical for the fiber probe. Inner surface of the two channels was covered by white barium sulfate to make the light distribution even. The handheld probe was designed to ensure the same distance between the end of fiber probe and the surface of sample.Experiment showed that different samples could be detected by adjusting distance between the end of fiberprobe and the bottom surface of handheld probe. One end of the bifurcated fiber was connected with handheld probe and the other two were connected with two spectrometers. Software of spectral data collecting and rapid detection was developed by using VC ＋ ＋,and can be run in Windows environment.Main modules of the software included parameter setting module, sample information management module,trigger control module,spectral information acquisition module,quality evaluation module and results display and storage module. The system could collect spectral data,process the data,detect the quality of sample and display

关 键 词：牛肉 含水率 无损检测 快速检测系统 

分 类 号：S123[农业科学—农业基础科学] TP274.5[自动化与计算机技术—检测技术与自动化装置]