Package Leak Detection Based on Aperiodic Anomaly Extraction

Foods are essential for our society, and they are transported and delivered after packaging to avoid contamination and deterioration of freshness. Nevertheless, there is a package leak problem in automatic packaging processes that would risk impairing human health. In order to protect human health and guarantee the reliability of the industrial automatic food production, automatic leak testing is necessary for all packages. This article developed a package leak tester and proposed an aperiodic anomaly test using the tester to detect the package leaks automatically. The developed package leak tester realized accurate reaction force measurement enabling accurate leak detection, and the proposed aperiodic anomaly test using an aperiodic derivative of the reaction force based on a leaking package model achieved robust leak detection against disturbances. The package leak tester and the aperiodic anomaly test were validated by testing 10 000 package data randomly generated by 388 experimental package data.