METHOD AND DEVICE FOR MEASURING THERMAL CONDUCTIVITY, AND GAS COMPONENT RATIO MEASURING DEVICE

METHOD AND DEVICE FOR MEASURING THERMAL CONDUCTIVITY, AND GAS COMPONENT RATIO MEASURING DEVICE

A heat radiation coefficient C [=Ph/(Th-To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. Further, a thermal conductivity » (T...

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Bibliographische Detailangaben
Hauptverfasser: OOISHI, YASUHARU, MORIO, SHUJI, AOSHIMA, SHIGERU, HAYASHI, YASUE, SHINGYOUJI, NOBUYOSHI
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Zusammenfassung:A heat radiation coefficient C [=Ph/(Th-To)] from a microheater is calculated in accordance with a power Ph applied to the microheater which is supported in air and provided in an ambient gas, a heater temperature Th, and an ambient temperature To at this moment. Further, a thermal conductivity » (T) of the ambient gas is obtained from the calculated heat radiation coefficient C based on a proportional relation [C=K·» (T) ] between a thermal conductivity » (T) of the ambient gas and the heat radiation coefficient C at a measurement temperature T [=(Th-To)/2].