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Gas detection apparatus and method for controlling gas sensor

  • US 20060113198A1
  • Filed: 11/17/2005
  • Published: 06/01/2006
  • Est. Priority Date: 11/26/2004
  • Status: Active Grant
First Claim
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1. A gas detection apparatus comprising:

  • a first sensing element provided in a first position to measure a concentration of a gas continuously;

    a second sensing element provided in a second position to measure the concentration of the gas intermittently, the second position being in close proximity to the first position;

    a deterioration determination unit connected with the first and second sensing elements to make a determination as to whether the first sensing element becomes deteriorated, by comparing output values from the first and second sensing elements; and

    a power controller configured to supply the second sensing element with electric power throughout waiting periods during which the second sensing element stops measuring the concentration of the gas, an amount of the electric power supplied throughout waiting periods being smaller than that supplied throughout operating periods during which the second sensing element continuously measures the concentration of the gas.

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