Abstract
By observing each output signal from experiments to recognize each of 6 gas sensors to measure the degree of indoor environmental pollution quantitatively, 7 kinds of simple gas, and one kind of complex gas were attempted. An independent recognition rule was established for each gas (8 rules). The result was determined from the position of a 6-dimension vector comprised of 6 sensor responses within the range determined by each rule, and a simple concentration index of the target gas was calculated from the input signal. As a result, 8 ranges were determined for each rule in 6-dimension vector spaces appeared to exist independently for the most part. However, negligible mistake in determination was confirmed in a low density area close to regular output in the determination experiment, information that can supplement the determination using a density guideline value should be obtained. The recognition rate without concentration correction was 99%. With concentration correction, 100% recognition rate could be obtained.
