TBK sensors use the light section method. This method allows the entire contour of the product to be examined, regardless of its shape. The sensors are an in-house-develpoment and measure up to 15,000 contours per second. Following the principle of two-dimensional triangulation, a laser line is projected onto the product surface. Diffusely reflected light provides the basis for the acquisition of cross-sections from which relevant information for controlling the rolling process can be generated.
TBK systems are able to calculate the precise cross section of the product using these values. The high-resolution and high measurement density enables the creation of a 3D model of the product, which also recognizes surface defects.