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APPARATUS AND METHOD FOR GENERATING LIGHT PULSES FROM LEDS IN OPTICAL ABSORPTION GAS SENSORS

  • US 20130271751A1
  • Filed: 10/28/2011
  • Published: 10/17/2013
  • Est. Priority Date: 11/01/2010
  • Status: Active Grant
First Claim
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1. A method of operating an optical absorption gas sensor for detecting an analyte gas, the sensor comprising a gas sample receiving chamber, at least one light emitting diode (LED) and a photosensor having an output signal sensitive to the amount of light received by the photosensor, the method comprising generating a plurality of pulses of light by passing a plurality of pulses of current through the at least one LED, and measuring the current through the at least one LED a plurality of times during each said pulse, and generating a compensated signal indicative of the concentration of an analyte gas in the gas sample receiving chamber taking into account both the photosensor output signal and the plurality of measurements of the current through the at least one LED.

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