Document Type : Original Article

Authors

Abstract

Eggshell crack detection in grading lines is very important. In recent years, various methods have been studied for this purpose. One of the conventional methods used in the eggshell crack detection is acoustic response. With this method, types of cracks which are apparent defects by analyzing the acoustic response to mechanical impact will be recognizable. In this research, the effects of factors related to acoustic system such as ball material, impact angle and microphone position on acoustic response in detection of cracks types were investigated. Accordingly, factorial experiments in a completely randomized design with three replications were performed. The results showed that levels of ball material, impact angle and microphone position and cracks types had significant effects (P<0.01) on the first three amplitudes and frequencies. Also, the results of this study showed that the use of plastic balls  at the hitting  angle of 45 degrees and positioning of microphone at the angle of 180 degrees is more suitable in designing of acoustic system to detect eggshell cracks.

Keywords

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