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:
- Issue Date:
- Research Org.:
- Univ. of California (United States)
- OSTI Identifier:
- 63436
- Patent Number(s):
- 5420380
- Application Number:
- PAN: 8-015,110
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- 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.
@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}
}