Designs and test results for three new rotational sensors
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We discuss the designs and testing of three rotational seismometer prototypes developed at the Institute of Geophysics, Academy of Sciences (Prague, Czech Republic). Two of these designs consist of a liquid-filled toroidal tube with the liquid as the proof mass and providing damping; we tested the piezoelectric and pressure transduction versions of this torus. The third design is a wheel-shaped solid metal inertial sensor with capacitive sensing and magnetic damping. Our results from testing in Prague and at the Albuquerque Seismological Laboratory of the US Geological Survey of transfer function and cross-axis sensitivities are good enough to justify the refinement and subsequent testing of advanced prototypes. These refinements and new testing are well along.
KeywordsRotational seismology Seismometry Instruments Instrument testing Instrument design
This work was carried out by cooperation between Czech and American seismologists under the framework of common Project No. ME10008 “Rotational seismometers—design, construction, calibration and field testing” of the AMVIS cooperative program (Czech acronym for the “American Science Information Centre” established between the respective governments for joint Czech–USA research programs).
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