Untitled - MendelNet 2013 - Mendelova zemědělská a lesnická ...

MENDELNET 2013Fig. 5 The effect of the crack position on the eggshell frequency response, egg loaded at the sharpendCONCLUSIONSThis work studied the possibility of the detection of eggshell crack based on eggshell impulseresponse. A system was developed for the detection. The knowledge of the cracks effect on theeggshell has been obtained using of the signal frequency analysis. The work showed that theproposed method is suitable for the crack detection. The main factors affecting the detectionreliability were identified. The work shows that cracked eggs can be effectively detected by impactmeasurement system coupled with a fast signal processing. The excitation resonance frequencycharacteristic of the cracked egg and intact egg can be identical in the situations when the detectionpoint is far from the position of the crack.REFERENCESDE KETELAERE, B., BAMELIS, F., KEMPS, B., DECUYPERE, E., DE BAERDEMAEKER, J.,2004: Non-destructive measurements of the egg quality. World’s Poultry Science Journal, 60, 3:289–302. ISSN 0043-9339.HUNTON, P., 1995: Understanding the architecture of the eggshell. World’s Poultry ScienceJournal, 51, 2: 141–147. ISSN 0043-9339.CHO, H. K., KWON, Y., 1996: Crack detection in eggs by machine vision. Transactions of theASAE, 39, 3: 777–784. ISSN 0001-2351.CHO, H. K., CHOI, W. K., PAEK, J. H., 2000: Detection of surface cracks in shell eggs byacoustic impulse method. Transactions of the ASAE, 43, 6: 1921–1926. ISSN 0001-2351.NEDOMOVA, S., TRNKA, J., DVORAKOVA, P., BUCHAR, J., SEVERA L., 2009: Hen'seggshell strength under impact loading. Journal of Food Engineering, 94, 3-4: 350–357. ISSN0260-8774.SEVERA, L., NEDOMOVA, S., BUCHAR, J., CUPERA, J., 2013: Novel approaches inmathematical description of hen egg geometry. International Journal of Food Properties, 16, 7:1472–1482. ISSN 1094-2912.SUN, L., BI, X., LIN, H., ZHAO, J., CAI, J., 2013: On-line detection of eggshell crack based onacoustic resonance analysis. Journal of Food Engineering, 116, 1: 240–245. ISSN 0260-8774.608 | P age