Container Leak Detection Using VOC Extraction for Small Leaks

The patent replaces mechanical sensor-based detection (visual or tactile sensors detecting lid deformation) with a gas analysis-based detection system. The inspection apparatus extracts and analyzes gas from the container interior, detecting volatile substances that indicate leaks. This substitution eliminates the reliability issue of mechanical systems that fail to detect small leaks, as gas analysis can sense even minimal leakage of volatile compounds.

The patent introduces gas (specifically volatile substances as indicators) as an intermediary to detect leaks. Instead of directly measuring lid deformation, the system extracts gas from the container and analyzes it for presence of volatile substances. This intermediary approach allows indirect but more reliable detection of leaks, as the presence of volatile gases in the extraction chamber clearly indicates container integrity failure.

The patent replaces the mechanical compression-and-deformation-detection system with a gas extraction and analysis system. Instead of compressing the container and measuring lid deformation, the system extracts gas from the container interior and analyzes it for volatile substances. This eliminates the measurement precision issues where small leaks cause ambiguous lid lifting that sensors cannot reliably distinguish from normal variations.

The patent changes the detection parameter from mechanical deformation (lid shape change) to chemical presence (volatile substance concentration in extracted gas). By measuring the presence and concentration of volatile substances in the extracted gas rather than mechanical lid displacement, the system achieves both high reliability and precision in detecting small leaks without the ambiguity of deformation-based methods.

The patent employs simpler, more cost-effective gas sensors instead of complex mass spectrometry systems. The inspection apparatus uses gas extraction and analysis with sensors that are less complex and more affordable than mass spectrometers, while still achieving reliable leak detection by detecting volatile substances in the extracted gas.

The patent extracts only the necessary component (gas from container interior) for analysis rather than analyzing the entire container or using complex comprehensive systems. By extracting gas through suction means and analyzing only that extracted sample for volatile substances, the system achieves reliable leak detection with simpler apparatus compared to mass spectrometry systems that would require analyzing the entire atmosphere or container.

The patent replaces the vacuum-and-lid-lifting-detection mechanical system with a direct gas extraction and analysis system. Instead of creating vacuum around the capsule and measuring lid lifting, the system directly extracts gas from the container interior through suction means and analyzes it for volatile substances. This substitution provides both the reliability to detect small leaks and the sensitivity to detect minimal volatile substance presence, eliminating the limitation where insufficient lid lifting leads to missed detections.

The patent uses extracted gas as an intermediary to detect leaks, replacing the lid lifting mechanism as the indicator. By extracting gas from the container interior and analyzing it for volatile substances, the system creates a direct connection between container integrity and detection signal, eliminating the intermediate and unreliable lid lifting step. Even small leaks that do not cause visible lid lifting will result in volatile substances being present in the extracted gas, ensuring reliable detection.