METHOD OF REGISTRATION OF SEISMIC SIGNALS WITH DIGITAL SEISMOMETRIC EQUIPMENT Russian patent published in 1994 - IPC

FIELD: seismometry. SUBSTANCE: in advance each seismograph is manufactured on the base of microprocessing structure, its information media are fabricated in the form of preliminary on-line storage and on-line storage and central control station is made in the form of controlling computer. Lower f_l and upper f_u frequencies of registered seismic signals as well as discretization frequency f_d are set for each seismograph from controlling computer. The latter is chosen from relation f_d=k₁f_u, where k₁=2-4. Directly after reception and analog-to-digital conversion of seismic signals they are recorded into region of preliminary on-line storage so it stores information on signals for last time interval with value Δt=k₂/f_l, where k₂=1-1.5. If magnitude of signal exceeds threshold of any of seismographs content of preliminary on-line storage is transferred into on-line storage and signals are continued to be registered in the latter till magnitude of extremum of signal drops below threshold. Later information from on-line storages of all seismographs is sent into controlling computer. EFFECT: improved operational characteristics and efficiency. 2 cl, 2 dwg