SOIL STRAIN GAGE INSTRUMENTATION

Abstract

Soil strain gage instrumentation was developed for the measurement of static and dynamic strains when embedded in soil. The gage is suitable for both laboratory and field application. The strain sensor consists of two mechanically uncoupled flat-coil disks which are embedded in the soil in near parallel and concentric orientation. The remainder of the gage comprises an identical set of coils positioned external to the soil as a standard reference, specially designed electronic driving, ampligying, and recording circuitry, and a precision micrometer coil mount. Soil deformations are determined by the resulting change in spacing of the embedded coil disks sensed as changes in mutual coil inductance. The gage is a reliable precise measuring device which is well suited for the measurement of strain in soil.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1966
Accession Number
AD0633887

Entities

People

  • R. B. Schwab
  • W. B. Truesdale

Organizations

  • IIT Research Institute

Tags

Communities of Interest

  • Advanced Electronics
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force Facilities
  • Construction
  • Contracts
  • Couplings
  • Detectors
  • Diagrams
  • Electronic Circuits
  • Engineering
  • Ferrites
  • Measurement
  • New Mexico
  • Oscillators
  • Phase Shift
  • Power Supplies
  • Stress Waves
  • Test And Evaluation
  • Wave Propagation

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Microwave Engineering.
  • Optical Fiber Sensing and Electromagnetic Propagation.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems
  • Space
  • Space - Satellites