See What's Really There. trevista®

Surface Inspection for Components with Free-Form Geometry/Curvature

Securing Shafts with Shape from Shading

The function of a component is largely determined by its geometry, especially with shaft-shaped membranes and bellows. Especially in the automotive and electronics industries, the correct shape, surface quality, and faultlessness must be guaranteed 100%. Components that have curved surfaces or areas with free-form geometry pose a great challenge to classic image processing. It's often not possible to illuminate the inspection areas sufficiently evenly and at the same time work out possible defect characteristics with high contrast. In many cases, a certain degree of gloss makes the reliable detection of faults even more difficult.

Solution and Benefits:

trevista® enables the fast and reliable inspection of shaft areas, making it the perfect solution for an automated 100% inspection.

  • Reliable detection of bad parts based on the topographical information down to the µm range
  • Minimized pseudo-reject rate
  • Suppression of brightness fluctuations and gloss effects
  • Inspection of curved surfaces
  • High parts throughput – short amortization
  • Plug-and-play without time-consuming tests and parameterization
  • Robust, no readjustment, maintenance-free
  • Seamless integration into your production process

Functional Principle – Simple and Efficient :

The trevista® procedure is based on a patented “Shape from Shading” technology, which means that information about the three-dimensional shape of an object can be obtained from the shading of surfaces. The surface to be tested is diffusely illuminated by means of a hemispherical scattering body. From several input images, a special algorithm calculates high-quality result images for the subsequent automatic evaluation.