Calibration of multiple light stripe sensors to create a multi-sensor system for the 3D measurement of complex macro geometries

3D measurements are especially needed for quality assurance. For simple geometries one sensor is often sufficient to detect whether an element is defect or not. However, with increasing dimensions and complexity of a measuring object, multiple sensors (at least two) are required to achieve a higher measuring volume and to avoid undercuts in order to measure an object in a prescribed time. The to be developed multi-sensor system of this research project is composed of seven light stripe sensors, mounted on a portal-shaped construction. While measuring the portal moves along the object and is subjected to oscillations. To get the pose of the measuring system, a rotating retroreflector and a laser tracker are also included in the system. The used light stripe sensors provide scan rates up to 5000 Hz at micron-level precision with a high measurement range. Due to their high depth of field, strongly curved structures can be measured without the impact of blurring which can cause adverse effects on the measuring results. The concept of the to be developed measuring system and the first step, the calibration of the laser stripe sensors to each other, will be presented.