Enhanced gravimeter
PTB-News 1.2017
20.01.2017
Diagrammatic sketch of the test mass (red) in the measuring ar-rangement
In conventional superconducting gravimeters, a test mass is levitated by the magnetic field of a superconducting coil. An elaborate adjustment allows the gravity of the earth to be measured at geographical locations by means of this measurement principle. PTB's new invention is based on an alternative geometry of the magnetic field and thus contains a new test mass in the form of a double cone. In this arrangement, the test mass centers itself, making a complex feedback circuit obsolete. The measuring signal is generated inductively by means of pick-up coils so that it is possible to en-hance the resolution by a factor of up to 100 (depending on the technology used). (Technology Offer 0429)
Advantages
increased resolution
without elaborate adjustment
Contact person for questions about technology transfer
Andreas Barthel,
Phone: +49 (0)531 592-8307,
andreas.barthel(at)ptb.de,
www.technologietransfer.ptb.de/en