×

Chemical analysis of urine and feces vapor

  • US 10,408,818 B2
  • Filed: 11/24/2015
  • Issued: 09/10/2019
  • Est. Priority Date: 11/27/2014
  • Status: Expired due to Fees
First Claim
Patent Images

1. A gas sensor system for use in, or in the vicinity of, a toilet, for detecting a target gas arising from use of the toilet, comprising:

  • a controlled gas release device for releasing a further gas at a controlled rate;

    a gas sensor for detecting a concentration of at least the target gas arising from use of the toilet and the further gas; and

    a controller for processing the detected concentration of the target gas and the further gas, wherein the controller is adapted to obtain a concentration of the target gas relative to a baseline concentration of the further gas through;

    (∫

    [a(t)−

    a0]dt/∫

    [r0−

    r(t)]dt)Sr/Sa where ∫

    represents integration over a sensing time period, a0 is a sensed concentration of the target gas at a start of a sensing cycle, a(t) is a sensed concentration of the target gas over time, r0 is a sensed concentration of the further gas at the start of the sensing cycle, r(t) is a sensed concentration of the further gas over time, Sa is a sensitivity of the gas sensor to the target gas, and Sr is a sensitivity of the gas sensor to the further gas.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×