| Zugriffsnummer | 49349 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Englisch |
| Titel | Two multi-wavelength interferometers for large-scale surveying |
| Autor(in); Institution |
Guillory, Joffray; Conservatoire National des Arts et Métiers (Cnam), Laboratoire commun de métrologie LNE-Cnam, Boissier, Paris, FRANCE
Troung, Daniel; Conservatoire National des Arts et Métiers (Cnam), Laboratoire commun de métrologie LNE-Cnam, Boissier, Paris, FRANCE
Kaillio, Ulla; Finnish Geospatial Research Institute, National Land Survey of Finland, Masala, FINLAND
Jokela, Jorma; Finnish Geospatial Research Institute, National Land Survey of Finland, Masala, FINLAND
Pilarski, Frank; 5.5, Wissenschaftlicher Gerätebau, PTB-Braunschweig
Weinrich, Stephanie; 5.5, Wissenschaftlicher Gerätebau, PTB-Braunschweig
Schmaljohann, Frank; 5.5, Wissenschaftlicher Gerätebau, PTB-Braunschweig
Silbermann, Jakob; Bernhard Halle Nachfl. GmbH, Berlin, GERMANY
|
| Quelle/Jahr | 5th Joint International Symposium on Deformation Monitoring (JISDM), 20-22 June 2022, Valencia, Spain:(2022), 31 - 39 |
| DOI | |
| Konferenzangaben | 5th Joint International Symposium on Deformation Monitoring (JISDM), Valencia, 20-22, June, Spain |
| Freie Schlagworte | two-colour refractivity compensation ; multi-wavelength interferometry ; multilateration ; system design ; long range measurement |
| Zusammenfassung | Deformation monitoring requires the detection of smallest changes, always at the limits of technical feasibility. Trying to push these limits further, we have realised two terrestrial ranging instruments: a long-range 1D electrooptic distance meter and a 3D multilateration-capable sensor system of 50 m range. The former one is intended as primary standard for the calibration of geodetic instrumentation with low uncertainty to the SI definition of the metre. The latter one is intended for monitoring larger monuments like VLBI antennas. In this contribution, we describe the technical challenges and our solutions for such instrumentation. We use the two-colour method for inline refractive index compensation. As common optical source, we developed a versatile multi-wavelength generator based on two Nd:YAG lasers stabilised by a phase-locked loop realised by Field Programmable Gate Arrays (FPGA). The 1D interferometer uses custom-designed achromatic optics and a mechanical frame optimised for form stability under field conditions. The phase demodulation system allows for maximum range flexibility from several meters up to several kilometres. The base ranging unit of the 3D multilateration system adheres to a different demodulation technique, which allows a relatively simple interferometer head design. This approach requires a sophisticated source modulation scheme limiting the applicability to distances over 15 m up to approximately 50 m in our case. |
| Kostenfreier Zugang | Freier Zugang |
| Rechteinformation | CC-BY-NC-SA |
| Themenbereich der Metrologie | Länge, dimensionelle Metrologie |
| Forschungsprojekt | 18SIB01: GeoMetre: Large-scale dimensional measurements for geodesy |
| Förderinformationen (1) |
Förderername: European Commission (EC)
Förderer ID: 0000 0001 2242 8989 Förderer ID Typ: ISNI Förderprogramm: EMPIR 2018 SI Broader Scope Titel der Förderung: 18SIB01: GeoMetre: Large-scale dimensional measurements for geodesy Förderungsnummer: 18SIB01 |
Zitierung
Sauthoff, A., Pollinger, F., Köchert, P., Meyer, T., Prellinger, G., Guillory, J., Troung, D., Kaillio, U., Jokela, J., Pilarski, F., Weinrich, S., Schmaljohann, F., & Silbermann, J. (2022). Two multi-wavelength interferometers for large-scale surveying. 5th Joint International Symposium on Deformation Monitoring (JISDM), Valencia, 20-22, June, Spain. https://doi.org/10.4995/JISDM2022.2022.13635