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Pulse wave detecting apparatus

  • US 5,170,796 A
  • Filed: 02/20/1991
  • Issued: 12/15/1992
  • Est. Priority Date: 03/01/1990
  • Status: Expired due to Term
First Claim
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1. A pulse wave detecting apparatus, comprising:

  • a pulse wave sensor having a press surface on which a plurality of pressure sensing elements are provided in an array, said pulse wave sensor being adapted to be pressed at said press surface against a body surface of a subject such that the array of pressure sensing elements crosses over a blood vessel underlying said body surface, each of said pressure sensing elements generating an electric signal representative of a pulse wave transmitted thereto from said blood vessel via said body surface;

    a main device receiving said electric signal from said each of said pressure sensing elements;

    determining means for determining a correlation between a distribution of magnitudes of the electric signals as taken along said array of the pressure sensing elements, and each of a plurality of predetermined reference distributions which is indicative of a corresponding one of a plurality of different relative positions of said array of pressure sensing elements with respect to said blood vessel;

    selecting means for selecting one of said reference distributions which provides the greatest correlation of all the correlations determined by said determining means; and

    transmitting means for transmitting to said main device the electric signals generated from the pressure sensing elements in a portion of said array of pressure sensing elements which portion corresponds to the relative position indicated by the reference distribution selected by said selecting means.

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