Hi, do we have a standard unit / convention for magnetometer readings?
In the xsens_imu and imu_xsens drivers, we are just forwarding the values from the xsens, which confirms to no standard at all (arbitrary unit with 1 being the magnetic field strength at calibration time in Enschede, Netherlands). The stim300, imu_kvh_1750 have no magnetometer inside. Some are using Tesla, some Gauss (10^-4 T). Most of the time we are interested in the magnetic flux density of the (distorted) earth magnetic field, which ranges from 30µT (equator) to 60 µT (pole). Apart from being the derived SI unit, Tesla is a little bit unhandy for these ranges, I think. But if we have a standard there, I would go with that. If not, I would either propose µT or Gauss. Total magnetic field strength today in Bremen (IGRF11 model): 49429.8 nT 49.4298 µT 0.494298 G 0.0000494298 T LG, Leif -- Leif Christensen DFKI Bremen Robotics Innovation Center Robert-Hooke-Straße 5 28359 Bremen, Germany Phone: +49 (0)421 17845-4149 Fax: +49 (0)421 17845-4150 E-Mail: [email protected] Weitere Informationen: http://www.dfki.de/robotik ----------------------------------------------------------------------- Deutsches Forschungszentrum fuer Kuenstliche Intelligenz GmbH Firmensitz: Trippstadter Straße 122, D-67663 Kaiserslautern Geschaeftsfuehrung: Prof. Dr. Dr. h.c. mult. Wolfgang Wahlster (Vorsitzender) Dr. Walter Olthoff Vorsitzender des Aufsichtsrats: Prof. Dr. h.c. Hans A. Aukes Amtsgericht Kaiserslautern, HRB 2313 Sitz der Gesellschaft: Kaiserslautern (HRB 2313) USt-Id.Nr.: DE 148646973 Steuernummer: 19/673/0060/3 ----------------------------------------------------------------------- _______________________________________________ Rock-dev mailing list [email protected] http://www.dfki.de/mailman/cgi-bin/listinfo/rock-dev
