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Acoustic detection apparatus

  • US 4,922,467 A
  • Filed: 03/23/1989
  • Issued: 05/01/1990
  • Est. Priority Date: 03/23/1989
  • Status: Expired due to Term
First Claim
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1. An apparatus for use in detecting the substance of an object contained within an enclosure, said apparatus comprising:

  • acoustic transmitter means for transmitting a pulse of acoustic energy at a first side of said enclosure;

    first acoustic receiver means for receiving acoustic energy reflected from the object to produce a reflected acoustic energy signal;

    second acoustic receiver means for receiving acoustic energy which has been transmitted or refracted through said object to produce a transmitted or refracted acoustic energy signal;

    signal processor means connected to said transmitter means and to said first and second receiver means, said signal processor means processing said transmitted pulse of acoustic energy, said reflected acoustic energy signal and said transmitted or refracted acoustic energy signal to produce an object signature indicative of said object; and

    comparator means for comparing said object signature with the signature of known objects to determine the substance of said object.

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