| 摘要 |
A disclosed direct velocity seismic sensor includes a housing, a proof mass suspended in the housing by a resilient component, and a motion dampener that damps oscillation of the proof mass to a degree that displacement of the proof mass relative to the housing is substantially linearly proportional to a rate of change of seismic displacements of the housing over a frequency range of interest. A described method for constructing a seismic sensor includes using a calculated resonant frequency to determine a damping factor that causes the displacement of the proof mass to be substantially proportional to the rate of change of seismic displacement of the housing. One illustrative disclosed system includes an optical velocity sensor and a detector where a light beam produced by the velocity sensor and a reference beam interfere at the detector, and the detector produces a signal indicative of a velocity experienced by the velocity sensor. 1110 r108 Fig. 1 114 116 118 12 412 202/ COHERENT EM WAVE SIGNAL DATA REC & POSITION 204 SOURCE(S) PROCESSOR PROCESSING INFO & OTHER 2- |CIRCUITRY PARAMETERS H EAY DETECTOR(S) 218 220 2 4 GEN. PURP. MAP STORAGE 1 206 208 ACCESS DATA PROC. AND/OR 10PORT SYSTEM DISPLAY 22 224 210 C226 Fig. 2A 21-SENSORS] |
