On-line Detection of Cracks in Eggshell

계란 크랙의 온라인 검출

  • 최완규 (충북대학교 농업기계공학과 정회원) ;
  • 조한근 (충북대학교 농업기계공학과 정회원) ;
  • 백진하 (충북대학교 농업기계공학과 정회원) ;
  • 장영창 (서울대학교 농업생명과학대학 농업개발연구소 정회원) ;
  • 연광석 (충북대학교 농업기계공학과 정회원) ;
  • 조성찬 (충북대학교 농업기계공학과 정회원)
  • Published : 1999.06.01

Abstract

This study was conducted to develop an automatic egg inspection system for detecting creaked eggs based on acoustic impulse response. This system includes a sound generator, a sound sensor with signal conditioner, and a computer. The sound generator that hit the sharp of the dull edges of an egg was constructed with a ceramic ball pendulum attached to a rotary type solenoid. The signal conditioner included a pre-amplifier and a digital signal processing (DSP) board. The parameters for distinguishing cracked and normal eggs were the area, the geometric centroid and the resonance frequency of power spectrum of the acoustic signal generated. An algorithm for on-line detection of the continuous transferring eggs was developed. The performance tests resulted with 91% success rate to separate cracked and normal eggs at the rate of 1 second per an egg.

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