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System for determining hazardous substance exposure rate from concentration measurement and heart rate data

  • US 5,164,898 A
  • Filed: 02/10/1992
  • Issued: 11/17/1992
  • Est. Priority Date: 06/10/1988
  • Status: Expired due to Fees
First Claim
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1. A portable device for measuring the rate of exposure of an individual to deleterious materials, comprising:

  • a heartbeat sensor for sensing an individual'"'"'s heart rate and for generating a heartbeat signal;

    heartbeat pulse converting means for converting said heartbeat signal into a heartbeat pulse signal;

    a deleterious material sensor for sensing a concentration of deleterious material in the air and for generating a signal p(t) representing the sensed concentration, where "t" is a time of sensing of said concentration;

    memory means for storing conversion values for converting a heart rate e(t) into a corresponding respiration rate b(t); and

    an operation unit for calculating a heart rate e(t) based on said heartbeat pulse signal from said heartbeat pulse converting means, for calculating a respiration rate b(t) corresponding to said heart rate e(t) based on a conversion value read out from said memory means, and for calculating a rate m(t) of exposure to deleterious material per unit time based on said calculated respiration rate b(t) and said concentration of deleterious material p(t) from said deleterious material sensor, said rate m(t) being given by ##EQU4##

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