摘要
设计了一套基于数字信号处理器DSP(TMS320F2812)的禽蛋裂纹在线检测系统,系统以禽蛋声学特性为基础,通过采集并分析敲击禽蛋产生的响应信号,可实现禽蛋裂纹的在线、实时检测。根据大量完好和裂纹禽蛋敲击响应信号特征的差异,提取了5个特征参数,建立相应判别模型,快速检测裂纹禽蛋。系统对75个完好和95个裂纹鸡蛋进行了在线检测试验,判对率分别为92.0%和90.5%,检测速率为5个/s,满足在线检测的要求。
An on-line system based on acoustic resonance combined digital signal processing（DSP） system was developed for eggshell crack detection.It was achieved by analysis of measured frequency response of eggshell excited with a light mechanical force.Based on previous experiments,differences between the signals of intact eggs and cracked eggs were analyzed.Five excitation resonant frequency characteristics of eggs were used as input vectors of identification model to discriminate intact and crack eggs.The identification results were transmitted to host computer.The system was employed for on-line detection of cracked eggs,identification rates of intact eggs and cracked eggs were 92.0% and 90.5%,respectively.This system can detect 5 eggs within one second.It completely meets the need of on-line detection.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2011年第5期183-186,共4页
Transactions of the Chinese Society for Agricultural Machinery
基金
"十一五"国家科技支撑计划资助项目(2006BAD11A12)
关键词
禽蛋
裂纹
声学特性
数字信号处理
在线检测
Eggs
Crack
Acoustical property
Digital signal processing
On-line detection
