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APPARATUS FOR SURFACE WAVE PARAMETER DETERMINATION

  • US 3,864,667 A
  • Filed: 09/11/1970
  • Issued: 02/04/1975
  • Est. Priority Date: 09/11/1970
  • Status: Expired due to Term
First Claim
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1. Apparatus for determining the observed frequency and the observed phase shift of a surface wave at a particular test location, the observed frequency and the observed phase shift being utilized to determine the parameters of a near surface layer of the earth, comprising:

  • means for generating a continuously varying frequency seismic signal through the earth;

    a pair of detectors disposed at the test location adapted to detect the surface wave component of the seismic signal, the detectors being spaced a predetermined distance apart;

    means for measuring the observed frequency of the surface wave detected by the two detectors; and

    means for measuring the observed phase shift of the surface wave detected by the two detectors.

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