| 摘要 |
PROBLEM TO BE SOLVED: To provide a technology for reducing a detection delay of a detected gas as possible although the detected gas is detected by pulse conduction. SOLUTION: A predetermined pulse voltage is periodically applied to a semiconductor gas detection element 1 for a predetermined period. An output in a detection target gas of the gas detection element 1 is obtained. The detected gas in the detection target gas is detected. When the predetermined pulse voltage is applied to the gas detection element 1, a first output in a first stable state is obtained and a second output in an equilibrium state corresponding to a concentration of the detected gas is obtained. When the second output exceeds a first predetermined value, the gas detection element 1 detects the detected gas. Even when a difference between the first and second outputs exceeds a second predetermined value, the gas detection element detects the detected gas. COPYRIGHT: (C)2004,JPO
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