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Title: Seismic switch for strong motion measurement

Abstract

A seismic switching device is described that has an input signal from an existing microseismic station seismometer and a signal from a strong motion measuring instrument. The seismic switch monitors the signal level of the strong motion instrument and passes the seismometer signal to the station data telemetry and recording systems. When the strong motion instrument signal level exceeds a user set threshold level, the seismometer signal is switched out and the strong motion signal is passed to the telemetry system. The amount of time the strong motion signal is passed before switching back to the seismometer signal is user controlled between 1 and 15 seconds. If the threshold level is exceeded during a switch time period, the length of time is extended from that instant by one user set time period. 11 figs.

Inventors:
; ;
Publication Date:
Research Org.:
University of California
OSTI Identifier:
63436
Patent Number(s):
US 5,420,380/A/
Application Number:
PAN: 8-015,110
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 440700; PA: EDB-95:092557; SN: 95001401188
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 30 May 1995
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; SEISMIC DETECTORS; SWITCHING CIRCUITS; RECORDING SYSTEMS; DESIGN; OPERATION; LIMITING VALUES; SIGNALS

Citation Formats

Harben, P.E., Rodgers, P.W., and Ewert, D.W. Seismic switch for strong motion measurement. United States: N. p., 1995. Web.
Harben, P.E., Rodgers, P.W., & Ewert, D.W. Seismic switch for strong motion measurement. United States.
Harben, P.E., Rodgers, P.W., and Ewert, D.W. Tue . "Seismic switch for strong motion measurement". United States. doi:.
@article{osti_63436,
title = {Seismic switch for strong motion measurement},
author = {Harben, P.E. and Rodgers, P.W. and Ewert, D.W.},
abstractNote = {A seismic switching device is described that has an input signal from an existing microseismic station seismometer and a signal from a strong motion measuring instrument. The seismic switch monitors the signal level of the strong motion instrument and passes the seismometer signal to the station data telemetry and recording systems. When the strong motion instrument signal level exceeds a user set threshold level, the seismometer signal is switched out and the strong motion signal is passed to the telemetry system. The amount of time the strong motion signal is passed before switching back to the seismometer signal is user controlled between 1 and 15 seconds. If the threshold level is exceeded during a switch time period, the length of time is extended from that instant by one user set time period. 11 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue May 30 00:00:00 EDT 1995},
month = {Tue May 30 00:00:00 EDT 1995}
}