Gas identification using micro gas sensor array and neural-network pattern recognition

✍ Scribed by Hyung-Ki Hong; Hyun Woo Shin; Hyeon Soo Park; Dong Hyun Yun; Chul Han Kwon; Kyuchung Lee; Sung-Tae Kim; Toyosaka Moriizumi

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 674 KB
• Volume: 33
• Category: Article
• ISSN: 0925-4005
• DOI: 10.1016/0925-4005(96)01892-8

✦ Synopsis

in order to identify CH3SH, (CH3)3H, C2HsOH and CO gases in the concentration range of 0. i to 100 ppm, a gas recognition system using a gas sensor array and neural-network pattern recognition has been fabricated. The sensor array consists of such thin film oxide semiconductor sensing materials as 1 wt% Pd-doped SnO2, 6 wt% Al203-doped ZnO, WO 3 and ZnO. The principal component analysis and the neural-network pattern recognition analysis were used for the discrimination of gas species and concentrations. Good separation among gases and concentrations was obtained using the principal component analysis. The recognition probability of the neural-network was 100% for each 5 trials of 12 gas samples.