Digital Feedback Seismometer Study

Abstract

Several methods are examined for obtaining digitized output data from the Geotech 36000 horizontal sensing seismometer in borehole installations. Configurations using either ternary or binary pulse width modulated torque-to- balance loops were found to be unsatisfactory. Analog-to-digital conversion of the output signal down-hole was found to be acceptable and a system using a digitizer within the seismometer feedback loop is recommended.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1974
Accession Number
ADA003508

Entities

People

  • David Gootkind
  • George J. Bukow
  • John R. Howatt

Organizations

  • Charles Stark Draper Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Air Force
  • Amplifiers
  • Amplitude
  • Analog Signals
  • Control Systems
  • Converters
  • Dynamic Range
  • Frequency
  • Frequency Bands
  • Impedance
  • Linear Systems
  • Measurement
  • Resistance
  • Simulations
  • Steady State
  • Waveforms

Readers

  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Control Systems Engineering.
  • Seismology