Quality control system dsound® PartCheck

monitoringprocessautomation

The dsound® PartCheck system for acoustic quality inspection enables automated 100% inspection of components for cracks, material defects and geometric deviations.

Non-destructive acoustic quality inspection directly in the production process

Using intelligent acoustic sensing technology, a wide range of materials and components can be inspected directly during the production process. By analyzing characteristic acoustic features, both individual manufacturing steps and the quality of the finished component can be objectively assessed.

Acoustic quality inspection offers significant advantages, particularly in industrial series and mass production. Deviations and anomalies can be detected immediately, allowing defective parts to be rejected at an early stage and changes in the manufacturing process to be identified quickly. This helps reduce scrap, rework and the associated costs.

A key element of the system is the intelligent dsound® USS4-LS airborne sound sensor. It is suitable for the acoustic quality inspection of small parts and components whose mechanical properties can be assessed based on their characteristic resonance behavior.

First, defect-free reference parts are analyzed to determine characteristic frequency ranges and acoustic features. These serve as the basis for evaluating the parts to be inspected.

During the subsequent inspection process, the component is mechanically excited, for example by a short impulse. The resulting characteristic sound and resonance behavior is detected contactlessly by the dsound® USS4-LS and evaluated directly within the sensor.

Material defects, cracks, geometric deviations or changes in mechanical connections can influence the resonance behavior of a component. By comparing the measured characteristics with the previously defined reference features, such deviations can be detected and the inspected parts classified as OK or NOK.

This enables fast, contactless and non-destructive quality inspection to be integrated directly into the production process – providing objective 100% inspection and consistently high product quality.

Typical applications

Quality inspection of small parts
Screws, springs, rings, stamped parts and other components can be inspected for characteristic deviations in their resonance behavior.

Crack and fracture detection
Cracks, hairline cracks and other structural changes can alter the natural frequencies and decay behavior of a component. These differences can be used to distinguish between good and defective parts.

Inspection of joints and assembly conditions
Changes in soldered, welded, bonded, press-fit or other mechanical connections can affect the acoustic behavior of a component and can therefore be detected.

Material and component differentiation
Different materials, alloys, geometries and component variants have characteristic resonance properties and can be distinguished based on their acoustic features.

End-of-line inspection
Finished components or assemblies can be inspected non-destructively at the end of the production process without disassembly or the need for additional complex inspection methods.