| 鸡蛋蛋壳裂纹的模式识别 |
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| 引用本文： | 陆秋君,王俊,张红梅. 鸡蛋蛋壳裂纹的模式识别[J]. 吉林大学学报(工学版), 2010, 40(3) |
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| 作者姓名： | 陆秋君 王俊 张红梅 |
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| 作者单位： | 浙江大学生物系统工程与食品科学学院,杭州,310029 |
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| 基金项目： | 国家自然科学基金项目(30570449);;教育部新世纪人才支持计划项目(NCET-04-0544) |
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| 摘 要： | 鸡蛋被敲击激励后,将传感器获得的时域信号进行频域特征分析后发现:无损蛋的频域特征曲线有明显的主频率值、峰值突出,而有裂纹蛋没有明显的主频率值。在归一化功率谱中,分别按"间隔频率提取幅值"、"依次高低取幅值"和"幅值高低依次提取频率"等方法来获取前10个或前20个特征值后,进行了主成分分析和线性判别分析,结果发现:采用间隔频率提取的幅值来判别裂纹蛋与完好蛋效果较差,采用幅值高低依次提取的频率来判别的效果最好;采用20个特征值经主成分分析和线性判别分析区分的效果分别均不如采用10个特征值的区分效果;线性判别分析区分的效果优于主成分分析区分的效果。
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| 关 键 词： | 食品工程 鸡蛋裂纹 裂纹检测 线性判别分析 主成分分析 |
Identification of eggshell crack by pattern recognition |
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| LU Qiu-jun,WANG Jun,ZHANG Hong-mei. Identification of eggshell crack by pattern recognition[J]. Journal of Jilin University:Eng and Technol Ed, 2010, 40(3) |
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| Authors: | LU Qiu-jun WANG Jun ZHANG Hong-mei |
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| Affiliation: | College of Biosystems Engineering and Food Science;Zhejiang University;Hangzhou 310029;China |
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| Abstract: | An egg is excited by a light mechanical impact on different locations of the eggshell,then the cracks are deteted by dynamical frequency response using flexible piezoelectric film sensors.Analyse show that the dominant resonance frequency can be observed and the frequency value is lower in the intact eggs.While for cracked eggs,there are several peak frequencies,the magnitudes of these frequencies are approximate,and the frequency value is higher.In normalization average of frequency domain,10 or 20 magnitu... |
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| Keywords: | food engineering egg crack crack detection principal component analysis PCA linear discriminant analysis LDA |
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