Systems and components for photogrammetric measuring

The transformation in three dimensional measuring technology as well as shape inspection using optical methods, which set in years ago, is constantly setting new standards in shorter and shorter cycles.

Although the potential of this technology cannot yet even be evaluated, these systems are already being used more and more in industry, as well as for serial checking. In the past, this type of process has been reserved for research type areas or financially strong industrial users.

Innovation and tradition are closely linked when optical systems are used, because the component to be assessed or measured must still be positioned or fixed somehow for the process. The basic concept of a holding or measuring fixture remains unchanged and is complemented by additional features, which are based on special requirements of visual processes.

Due to cooperation with the manufacturers of optical systems, Witte recognized the trend early and has risen to the challenge. System elements and concepts have been developed that are downward compatible and can be integrated into existing devices for optical measurement technology.

An essential element for photogrammetry is referencing by means of optical targets within the holding or measuring fixture, as well as on the measured components themselves.

Witte offers optical reference markers (targets, which fit directly into holes of the proven "ALUFIX" - system, as well as target cubes for positioning in holes of parts or other fixed geometry elements.
Targets and target cubes can be attached to fixture frames and components quickly and without any extra elements or adapters.

In addition, the modular system "ALUFIX" also provides suitable conditions for the specific characteristics of optical measuring systems.
Fixtures virtually free of interfering contours for full-surface accessibility or multi functionality for different or similar components (also called folding fixtures ) are just a few examples, which make "ALUFIX" and "TARGETO" the ideal basis for modular fixtures.

Alufix fixtures in "photo frame" style with mounted targets
All "ALUFIX" standard bars can be equipped with reference points and individually adjustable targets thereby converting a fixture simultaneously into a reference and orientation guide.

Target frame for stand-alone parts or vehicles / extension rods
When no fixture is necessary a target framework is used, which can be equipped with reference points and targets. The components can be connected to a flat frame network or to spatial devices by connecting multiple frames.

All the elements are combinable with each other and equipped with coded target rings, Further target holders can be clipped on.
Rails or foot plates form the basis for positioning and fixing of telescopic columns. Alternatively set up on an "ALUFIX" fixture or a Witte sandwich plate is possible. Integrated joints can be used to follow the angled line of a car roof.

All cross bars are designed as telescopic tubes (in several basic lengths with appropriate ranges of adjustment). This enables maximum flexibility in design and dimension of frame size. In order to ensure a repeatable build of framework or subgroups after i.e. transport or removal of the vehicle, all rails and telescopic columns are equipped with millimeter scales.

Target cubes as measuring accessories for easy and accurate measurement of holes in components
"FIXINSPECT PG" adapters (target cube) serve as measuring accessories for easy and accurate measurement of component bores. The cubes, existing in three clearly distinguishable variations, have coded matrix dots on five visible sides. Magnets or finger pins hold the Fixinspect cubes in place on work pieces. Spring-loaded cones guarantee exact centering in holes. Specially shaped adapters are available to mount on work piece edges and corners.