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Movable seismic pavement analyzer

  • US 5,614,670 A
  • Filed: 07/02/1996
  • Issued: 03/25/1997
  • Est. Priority Date: 10/29/1993
  • Status: Expired due to Term
First Claim
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1. A device for seismically testing a multi-layer roadway surfacing, said surfacing comprising a paving layer, the device comprising:

  • a mobile support adapted to be moved across the surface of the paving layer;

    a high-frequency seismic source mounted on said mobile support and adapted to be impacted on the paving layer so as to transmit a high-frequency seismic wave into said roadway surfacing;

    a low-frequency seismic source mounted on said mobile support and adapted to be impacted on the paving layer so as to transmit a low-frequency seismic wave into said roadway surfacing;

    a plurality of seismic transducers mounted on said mobile support and adapted to be coupled to the paving layer so as to detect said seismic waves following transmission through said roadway surfacing, wherein each said transducer is coupled to said mobile support through a separate pneumatic cylinder; and

    a computer electrically coupled to said transducers and seismic sources, said computer comprising;

    means for initializing acquisition options to define measurement values for N seismic measurements to be made on said roadway surfacing to obtain selected surfacing parameters;

    means for defining a bank of seismic transducers for each of N seismic measurements;

    means for selecting a transducer bank based on said acquisition options;

    means for receiving seismic data from said bank of seismic transducers;

    means for processing said seismic data to obtain processed seismic data;

    means for computing said selected surfacing parameters based on said processed seismic data;

    means for evaluating said selected surfacing parameters to detect defects in said roadway surfacing; and

    means for diagnosing paving-layer-specific pavement distress precursors based on evaluated surfacing parameters.

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