High efficiency portable seismograph for measuring seismic tremor
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United States of America Patent
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Sep 21, 2010
Grant Date -
Oct 4, 2007
app pub date -
Jul 18, 2005
filing date -
Jul 19, 2004
priority date (Note) -
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Abstract
Portable seismograph (1) comprising a support and containment structure (2), a bottom portion (3) of which is made of a material having a seismic impedance value ranging between 2.times.10.sup.5 and 4.times.10.sup.6 kg/m.sup.2s, three sensors (4) placed orthogonally to one another, each comprising at least one electrodynamic or capacitive transducer and, attached to the bottom portion (3), a level (11) to position the support and containment structure horizontally, a control unit (5) connected to the sensors (4) for viewing, managing the acquisition mode, recording and processing the data, a power source (9), and means for coupling to the ground (12; 21) designed not perturb the seismic tremor detectable by the sensors (4).
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