Apparatus and method for determining the indoor air quality...

G - Physics – 06 – F

Patent

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G06F 7/02 (2006.01) G01N 33/00 (2006.01)

Patent

CA 2125810

ABSTRACT An instrument for evaluating the quality of air within an enclosed space includes a sensor array and a data processing system. A sensor array is positioned to monitor the air within the space, with at least two nonspecific sensors for detecting odiferous and nonodiferous pollutants present in the air, and a humidity sensor. It is preferred that the sensor array also include sensors for temperature and carbon dioxide. A computer collects the sensor signal data and processes it to extract features from the same, and pattern recognition software analyzes the data to determine the pollution index of the air. The pattern recognition software of choice is an artificial neural network, but alternative means include direction cosine or Euclidean distance analysis systems.

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