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Metrologie: Präzisionsmesstechnik für Qualitätsprüfung, Toleranzen & Prozessfähigkeit

Begriffe und Methoden der Metrologie, die die Qualität und Aussagekraft von Messungen beschreiben.

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Gauge Capability

Gauge capability quantifies a measuring instrument’s ability to resolve a tolerance band reliably. It is evaluated with the indices Cg and Cgk using a Type-1 study on a calibrated reference part.

Beurteilung der Maßhaltigkeit von Bauteilen im Vergleich zu Idealwerten

Geometric Dimensioning and Tolerancing

GDT is the standardized symbolic language for defining geometric requirements on engineering drawings, covering form, orientation, location, profile, and runout.

Linearity quantifies the maximum deviation of a sensor’s output curve from an ideal straight line. It is a fundamental accuracy component for industrial 3D sensors and infrared cameras.

Measurement System

MSA quantifies measurement system variation using Gage R&R and standard studies.

A point cloud is an ordered set of 3D points (x, y, z) that represent an object’s surface and are used for geometric inspection.

Rectified Data (Z-Map)

Calibrated height raster data generated by applying intrinsic and extrinsic sensor parameters to raw 3D measurements, enabling metrically valid surface analysis.

Reference Point System (RPS)

The RPS constrains all 6 degrees of freedom of a measurement object using defined datum points, enabling reproducible sensor-to-part alignment and reliable dimensional inspection results.

Resolution in Metrology

Resolution defines the smallest detectable change a sensor-based measurement system can reliably distinguish — the detection threshold that governs precision across 3D sensors, IR cameras, and optical inspection systems.

Sensor Accuracy

Sensor accuracy measures how closely a sensor’s output agrees with the true value of the measurand. It determines measurement reliability in industrial inspection and quality control.

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Tim Lüdemann

Support & Application Ingenieur

+49 (0)4531 / 88011-42