基于敲击振动检测苹果内部缺陷的研究  

Detection of internal defect in apples by acoustic impulse technique

作　　者：苏子鹏[1] 屠康[1] 邹秀容[1] 静玮[1] 潘磊庆[1] 

机构地区：[1]南京农业大学食品科技学院,江苏南京210095

出　　处：《食品工业科技》2008年第7期235-238,共4页Science and Technology of Food Industry

基　　金：教育部"新世纪优秀人才支持计划"资助项目(NCET-05-0491);江苏省自然科学基金资助项目(BK2006707-2);国家自然科学基金项目(30771512)

摘　　要：为了能快速检测并剔除有内部缺陷的苹果,利用敲击振动的方法研究了红富士和金冠苹果共振频率的变化规律,发现苹果的硬度系数和腐烂面积有很好的相关性,提出了一种无损检测苹果内部缺陷的方法。红富士和金冠苹果的硬度系数与腐烂面积的相关系数R2分别为0.998和0.878。以苹果的硬度系数为自变量,建立了Logistic回归方程,其中第5d红富士和金冠苹果的预测值与实际值一致对比例为76.0%和78.9%,OR(比数比)值分别为76.0和79.0,建立的方程基本能够检测出内部有缺陷的苹果。In order to quickly find out apples with internal defect, an acoustic impulse response technique was used, This technique provided a stiffness coefficient, based on the first response frequency and the mass of the fruit. A good correlation was found between stiffness coefficient and decay areas of the detected apples, the R2 value amounts to 0.998 for Red Fuji and 0.878 for Golden Delicious, The percent concordant of predicted probabilities and observed responses of Red Fuji and Golden Delicious was 76,0% and 78,9%, while the OR （Odds Ratio） value was 76.0 and 79.0 on the fifth day, It was confirmed that the logistic regression equation could detect the apples with internal defect,

关 键 词：苹果 敲击共振 内部缺陷 无损检测 

分 类 号：TS207.3[轻工技术与工程—食品科学]