Automatic monitoring system designed to detect defects in PET preforms K.V. Degtyareva, S.V. Nikolaev, V.A. Nelyub, V.S. Tynchenko and A.S. Borodulin E3S Web of Conf., 458 (2023) 02002 Published online: 07 December 2023 DOI: 10.1051/e3sconf/202345802002