基于DSP的鸡蛋裂纹多通道检测系统

Multi channel detection system of eggshell crack based on DSP

为了实时采集鸡蛋敲击响应声音信号,设计了基于TMS320F28335的鸡蛋裂纹检测系统,采用外部中断触发DSP实时采集敲击响应音频信号。结果显示:完好蛋与裂纹蛋的声音信号频谱存在明显差异,完好蛋频谱的第二共振峰频率集中在6 890Hz左右,而裂纹蛋的第二共振峰频率无明显规律。结果表明,该系统能够满足检测的要求。

The eggshell-crack can be detected by the acoustic features of impact response signal in a non-destructive way.To collect and analyze the acoustic signals in real time,an eggshell crack detection system based on TMS320 F28335 was designed.The acquisition of the responded audio signal was triggered by the external interrupt of DSP.By comparison of frequency spectrums between intact and cracked eggs,there is a significant difference in the audio signal spectrum.The frequency of the second formant of the intact egg spectrum is concentrated at about 6 890 Hz,while the frequency of the second formant of the cracked egg has no obvious regularity.In conclusion,the system can meet the requirements of detection and provide a hardware platform for the further research of eggshell crack detection algorithms.