Evaluation process

Digital Master

In the first step, the parts are chosen, which are accepted as OK by the customer. The surfaces of these components are captured with the surfaceCONTROL 3D sensor. The parameters of acceptable surface forms are calculated via the generated 3D-data and archived in an associative memory. Behind this is a neuronal network, which is trained with the data. In the inspection process the surface data of the object to be inspected is first captured with the sensor. Afterwards the software reconstructs the object based on the trained data and calculates an individual master. Then it is compared against this master. When there are no differences between the calculated master and the part that is controlled, the part is flawless. Deviations are shown in a DefectMap. This process is ideally suited to series control.

Digital shape

With polynomial approximation, the 3D surface data is described by mathematical functions (polynomials). Depending on their degree, the polynomials have the ability to adapt the shape of the surface like an envelope. The 3D data is compared against the calculated envelope and any potential deviations in the surface are identified as defects. The digital shape evaluation is suitable for rapid analysis of flat and slightly curved surfaces.

Digital stone

A training process is not necessary for the digital stone, as it is used on the previously captured 3D data directly. During this process the software is looking for the two highest points (contact point) along a line segment. Afterwards the gaps between the line segment and the 3D-data are calculated. It is mainly used in the analysis of defects in the toolmaking process as well as in pre-production series.

Digital light tunnel

It can be very difficult to detect very small local deviations on tested components, in particular on matt surfaces. It is common practice, for example, to paint vehicle body parts in glossy black and inspect under special lighting, such as a light pipe, in order to get a visual impression of a defect's geometric form. This process cannot be used for all surfaces, it requires additional time and material, and the components cannot be used afterwards. This is why surfaceCONTROL offers the possibility to impose defined characteristics (colour, glossy finish) onto the captured 3D surfaces and inspect them on the monitor either under diffuse lighting or with a light bar. So without any additional material even the smallest defects become visible and can be assessed visually.


INB Vision AG

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