Experimental Mechanics

, Volume 9, Issue 8, pp 374–379 | Cite as

A new device for in-situ movement detection and measurement

Paper presents an application of the circular-grid moiré method to the design of a displacement-measurement device for geological applications
  • Blahoslav Košťák


A new device for movement detection in joints is designed using the moiré technique. Archimedean spiral grids are used. A space displacement may be evaluated in two planes by vectors of known magnitudes and directions. An extremely simple design is proposed to provide stability for the system being installedin situ over long periods of time.


Mechanical Engineer Fluid Dynamics Movement Detection Simple Design Archimedean Spiral 
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  1. 1.
    Košťák, B., “Zarízení ke zjîsîování a měření relativních pohybů nebo posunů těles,” Czechoslovak Patent Application No. 4602-67.Google Scholar
  2. 2.
    Pirard, A., “Consideration sur la méthode du moiré en photoélasticité,”Revue Universelle des Mines,16,9 Série (1960).Google Scholar
  3. 3.
    Oster, G., and Nishijima, Y., “Moiré Patterns,” Sci. Amer. (May 1963).Google Scholar
  4. 4.
    Košťák, B., “General Interpretation of Moiré Patterns in Strain Analysis,” Jnl. Strain Anal. (April 1968).Google Scholar
  5. 5.
    Košťák, B., and Popp, K., “Moiré Strain Gauges,” Strain,2 (1966).Google Scholar

Copyright information

© Society for Experimental Mechanics, Inc. 1969

Authors and Affiliations

  • Blahoslav Košťák
    • 1
  1. 1.Geological Institute of the CzechoslovakAcademy of SciencesPragueCzechoslovakia

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