Photogrammetry Technology
The photogrammetry systems are used as a portable 3D Coordinate Measuring System (CMM) for point measurement and it allows inspection and quality control in the same plant. The system consists only of a camera so it can be easily transported to where the measurement needs to be taken in order to avoid having to move the objects to the editing rooms or metrology laboratories.
The most important advantage of photogrammetry systems is its ability to measure large objects while maintaining a high accuracy in measurement, up to 15 (microns/ meter) (VDI 2634).
Thus, this system can measure objects up to several meters in size such as airplane wings, rotor hubs, windmills blades or trains boogies.
Measuring principle
The system uses a high resolution camera for capturing data.
"Targets" should be placed on all the points that need to be measured. Adapters are provided to measure different features such as holes, ridges or other specific points of reference.
Subsequently, the object must be photographed from different planes, angles and in different directions. These images are uploaded to the computer and then processed with the management system software.
The system automatically calculates the 3D coordinates of all the points with "targets". The calculation is based on the principle of using triangulation between the space of the images (photogrammetry) and it is fully automatic. It is not required to pre-calibrate the camera because the software uses a calibration process that works simultaneously with integrated data processing.
