Title:
GAS DETECTING METHOD
Document Type and Number:
Japanese Patent JP2000292402
Kind Code:
A
Abstract:
To permit Fourier transform by a signal waveform corresponding to one cycle and to rapidly detect gas.
A sine wave is applied to the heater 6 of a gas sensor 2 and, for example, the signal waveform of the sensor corresponding to one cycle is extended to that corresponding to 4-16 cycles to be subjected to Fourier transform. The obtained Fourier spectrum is inputted to a neutral net to determine a gas kind and the concn. of gas is determined by the multiple regression analysis from the Fourier spectrum to the concn. of gas with respect to the determined gas kind.
Inventors:
KATO AKIRA
KATO KIMIKO
UKO TOSHIHIRO
TAKAMATSU KAZUKO
KATO KIMIKO
UKO TOSHIHIRO
TAKAMATSU KAZUKO
Application Number:
JP9750099A
Publication Date:
October 20, 2000
Filing Date:
April 05, 1999
Export Citation:
Assignee:
FIGARO ENG
International Classes:
G01N27/12; (IPC1-7): G01N27/12
Attorney, Agent or Firm:
Akira Shioiri (1 person outside)
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