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Bioelectric signal detector and massage machine

  • US 7,043,296 B1
  • Filed: 11/17/2000
  • Issued: 05/09/2006
  • Est. Priority Date: 11/19/1999
  • Status: Expired due to Fees
First Claim
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1. A biosignal sensing device for sensing a biosignal from a living body as a subject, comprising:

  • an oscillating section for supplying a high frequency signal;

    an electrode section including an electrode mounted so that said living body as a subject can be in close proximity to or in contact with said electrode, said electrode being coupled to receive said high frequency signal from said oscillating section;

    a sensing section for sensing a change in impedance that occurs in said electrode receiving said high frequency signal when said living body as a subject is in close proximity to or in contact with said electrode;

    a signal amplifying section having a filter function to extract a signal according a desired biosignal from a signal corresponding to said sensed change in impedance; and

    a signal processing section for producing said desired biosignal from said signal extracted by said signal amplifying section, whereinsaid sensing section produces and supplies a signal indicating a change in reflected-wave level of said high frequency signal corresponding to said change in impedance that occurs in said electrode according to body movement of said living body, anda frequency of said high frequency signal supplied from said oscillating section is preset to a value in a region where said reflected-wave level changes at a high rate according to change in said frequency with respect to a region where said reflected-wave level changes at a minimum rate according to change in said frequency,wherein said desired biosignal is indicative of a respiration rate.

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