Automatic camera calibration and sensor registration of a multi-sensor fringe measurement system using hexapod positioning

Metzner S, Hausotte T (2019)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2019

Book Volume: 11056

Pages Range: 1 - 9

Conference Proceedings Title: Proc. SPIE 11056, Optical Measurement Systems for Industrial Inspection XI, 1105616

Event location: Munich DE

DOI: 10.1117/12.2526122

Abstract

For the requirements of newly developed production processes like sheet bulk metal forming a previously developed measuring method exists for dimensional measurement of these manufactured parts. The presented multi-sensor approach allows the combination of several fringe projection sensors with different measurement resolutions and ranges to meet the requirements of the new production technology. The measurement setup includes a high precision hexapod to position the investigated workpiece inside the measuring volume. The measurement devices utilized are high precision fringe projection systems with 17 µm lateral and 1 µm vertical resolution. An additional overview sensor captures the whole measurement range of the hexapod. This paper presents two approaches that can be used for camera calibration and sensor registration of the fringe projection systems in a global coordinate system. A speckle pattern and a random dot pattern are placed on the hexapod to calculate the intrinsic parameters of the sensor camera and extrinsic parameters of the fringe sensor in one single step. To obtain metric lengths with the calibration process, a defined scale is included additionally on the pattern. The calibration process is executed by an automatic and random movement of the hexapod in the recording area of the sensors. Measurements show a direct transferability from the camera to the sensor coordinate system. This allows the measurement datasets to be directly merged together without the use of a separate registration routine.

Authors with CRIS profile

Sebastian Metzner Lehrstuhl für Fertigungsmesstechnik Tino Hausotte Lehrstuhl für Fertigungsmesstechnik

Related research project(s)

Strategies for function-oriented optical inspection of formed precision components (A06) (TR 73 - A06) TRR 73: Manufacturing of complex functional components with variants by using a new sheet metal forming process - Sheet-Bulk Metal Forming Jan. 1, 2009 - Dec. 31, 2020

How to cite

APA:

Metzner, S., & Hausotte, T. (2019). Automatic camera calibration and sensor registration of a multi-sensor fringe measurement system using hexapod positioning. In SPIE (Eds.), Proc. SPIE 11056, Optical Measurement Systems for Industrial Inspection XI, 1105616 (pp. 1 - 9). Munich, DE.

MLA:

Metzner, Sebastian, and Tino Hausotte. "Automatic camera calibration and sensor registration of a multi-sensor fringe measurement system using hexapod positioning." Proceedings of the SPIE Optical Metrology, 2019, Munich Ed. SPIE, 2019. 1 - 9.

BibTeX: Download