敲击振动检测鸡蛋裂纹的初步研究  

Preliminary research of chicken egg crack detection based on acoustic resonance analysis

作　　者：潘磊庆[1] 屠康[1] 赵立[1] 赵艺泽[1] 潘秀娟[1] 

机构地区：[1]南京农业大学食品科技学院,南京210095

出　　处：《农业工程学报》2005年第4期11-15,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家"863"计划项目(2002AA248051);国家自然科学基金项目(30371050)

摘　　要：现代化的蛋品加工业中,传统的照蛋检测鸡蛋裂纹技术远不能满足生产的自动化要求,为了实现快速在线无损检测鸡蛋裂纹,试验通过在鸡蛋不同部位施加机械冲击,利用计算机处理产生的声音信号,分析壳裂鸡蛋和完好鸡蛋的响应频率差异。结果表明:敲击赤道不同的部位,完好鸡蛋各点的特征响应频率十分接近,而壳裂鸡蛋差别较大。根据赤道四点特征响应频率变异系数(CV),建立了初步分级算法,使得裂纹鸡蛋检出水平达到91%,对整批鸡蛋的分级准确率达到87%。In modern egg processing plant, eggshell crack detection in egg sorting and packaging is a major bottleneck for automation because it is largely done by human workers. In order to find out quick eggshell crack detection nondestructively for on-line application, frequency responses of an egg excited with a light mechanical impact at different locations on the eggshell were studied. Through analyzing the response frequency by the computer, it was found that the characteristic response frequency of intact eggs changed in a small range but the characteristic response frequencies of cracked eggs were heterogeneous and varied in a larger frequency range. By analyzing coefficient of variation (CV) of the four characteristic response frequencies at the chicken egg equator zone, a sorting algorithm to detect crack eggs was developed. Based on this method, the detecting rate was for cracked chicken eggs and 87% for the total chicken eggs.

关 键 词：鸡蛋 裂纹 检测 敲击 特征响应频率 变异系数 

分 类 号：TP391.8[自动化与计算机技术—计算机应用技术]