A vision system is not considered reliable simply because it correctly identifies a handful of sample parts. For use in production, it must be verifiably established that measured values and good/bad decisions are repeatable under defined conditions.
THOP plans and supports the acceptance of industrial machine vision systems. Depending on the inspection task, we carry out measurement system analyses or suitable attributive capability studies. The results are transparently evaluated and documented.
A measurement system analysis makes sense when results from the vision system are used for quality decisions, process releases or the automatic rejection of parts. It shows whether an observed deviation actually originates from the product or is caused by the camera, lighting, part positioning, evaluation algorithm or other influences of the inspection system.
The system delivers a numerical measured value – for length, diameter, distance or position, for example. We examine how much this value scatters across repetitions, whether a systematic deviation is present, and how robust the measurement remains under real production conditions.
The system delivers no numerical value but a decision – good/bad, OK/not OK or detected/not detected, for example. What matters is whether it reliably and repeatably distinguishes real good parts, defective parts and critical borderline samples.
Cg/Cgk, %GRR and Kappa are common guide values in practice. The actual acceptance limits are defined together with you, depending on standard, customer and inspection task.
THOP can examine not only newly developed THOP systems. Once the technical prerequisites have been clarified, we also support the assessment of existing vision systems – for example after modifications, product changes, software adjustments or in the case of recurring problems in production. These may be customer-specific solutions or systems from established manufacturers.
Suitable reference parts and clear quality criteria. If the definition of good and bad is not yet unambiguous, we first develop a sound basis for the decision together.
No. We document the performance of your vision system within the agreed application and inspection context. For an accredited calibration or independent certification we involve an appropriately authorised body if required.
This depends on whether the system delivers numerical measured values or attributive good/bad decisions. THOP determines the appropriate approach based on the inspection task and customer requirements.
Yes. Parts close to the decision boundary are particularly important for assessing the robustness of the classification under realistic conditions.
Yes, provided system access, suitable reference parts and sufficient information about the inspection task are available.
The feasibility study includes technical repeat trials, but it is not yet a full acceptance of the later production system. A formal measurement system analysis is planned separately and carried out on the defined system.
No. THOP carries out application-related investigations and documented system acceptances. If an accredited calibration or independent certification is required, this must be performed by an appropriately authorised body.