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

Title:

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

Document Type and Number:

WIPO Patent Application WO/2007/037209

Kind Code:

A1

Abstract:

According to power Ph applied to a microheater provided in an atmospheric gas while being supported in the air, and the heater temperature Th and the ambient temperature To at that time, a heat radiation coefficient C[=Ph/(Th-To)] from the microheater is calculated. Based on the proportionality [C=K·λ(T)] between the thermal conductivity λ(T) of the atmospheric gas and the heat radiation coefficient C at a measurement temperature T[=(Th -To)/2], the thermal conductivity λ(T) of the atmospheric gas is determined from the thus-calculated heat radiation coefficient C.

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Inventors:

OOISHI YASUHARU (JP)
AOSHIMA SHIGERU (JP)
SHINGYOUJI NOBUYOSHI (JP)
HAYASHI YASUE (JP)
MORIO SHUJI (JP)

Application Number:

PCT/JP2006/318987

Publication Date:

April 05, 2007

Filing Date:

September 25, 2006

Export Citation:

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Assignee:

YAMATAKE CORP (JP)
OOISHI YASUHARU (JP)
AOSHIMA SHIGERU (JP)
SHINGYOUJI NOBUYOSHI (JP)
HAYASHI YASUE (JP)
MORIO SHUJI (JP)

International Classes:

G01N25/18

Foreign References:

JP2005505758A	2005-02-24
JP3114139B2	2000-12-04
JPH10508382A	1998-08-18
JP3153787B2	2001-04-09
JP2797198B2	1998-09-17
JP2001221758A	2001-08-17

Other References: