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SENSOR WITH GAS-KIND CLASSIFYING FUNCTION, GAS SENSOR WITH POLAR-GAS CLASSIFYING FUNCTION AND GAS SENSOR WITH SMOKE- CONTAINING POLAR-GAS CLASSIFYING FUNCTION
SENSOR WITH GAS-KIND CLASSIFYING FUNCTION, GAS SENSOR WITH POLAR-GAS CLASSIFYING FUNCTION AND GAS SENSOR WITH SMOKE- CONTAINING POLAR-GAS CLASSIFYING FUNCTION
PROBLEM TO BE SOLVED: To provide a sensor which can be miniaturized and made at low cost by a method, where the structure of a catalytic combustion-type gas sensor and the acquisition timing of a sensor output are optimized and a plurality of gas kinds and smoke can be classified only by one catalytic combustion-type gas sensor, and to provide a sensor which detects gas at a high speed and which achieves low power consumption.;SOLUTION: The gas kinds are classified, by using the fact that the sensor output in a rise period from the point of time of an charging start up to the point of time of a steady operation displays a peak waveform specific to a specific kind of gas. The gas kinds and the smoke are classified by using the ratio of a maximum value in the rise period of the sensor output of the catalytic combustion-type gas sensor 40 to a steady value in the point of time of the steady operation. Thereby, the gas kinds can be classified, by using only one sensor 40 used to detect gas leakage. Since the sensor output in the rise period is used to classify the gas kinds the gas kinds can be classified at a high speed.;COPYRIGHT: (C)2003,JPO
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