Quality control inspection system dsound® Tap Check

ultrasonicelectronicdynamic

The dsound® Tap Check system detects damaged and defective glass containers and enables subsequent automated sorting.

The system is integrated directly into the production line and inspects every single container. With an inspection capacity of up to 28,000 containers per hour, it is designed for high-speed industrial operation. It consists of an airborne sound sensor, a mechanical excitation unit, and two light barriers for precise triggering and process synchronization.

The operating principle is based on acoustic resonance analysis. The airborne sound sensor dsound® USS4-LS evaluates the characteristic resonance frequencies of the glass container after it has been impulsively excited by the system. This enables conclusions to be drawn about the structural condition of the container.

The excitation unit generates a defined mechanical impulse excitation that sets the container into vibration. Within the glass body, sound waves propagate, causing the container to oscillate for a short period in its natural resonance modes. At the surface, these structure-borne vibrations are converted into airborne sound and can therefore be reliably detected by the integrated USS4 airborne sound sensor.

From the measured frequency spectrum, characteristic features are calculated and subsequently assigned to specific conditions such as “intact,” “damaged,” or “cracked.” This enables highly reliable quality assessment within the ongoing production process.