Gas measuring apparatus

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	Gas measuring apparatus
其他题名	Gas measuring apparatus
	MAEKAWA, AKIRA; KUSABA, MIYUKI; TAKAGI, SHIGEYUKI; HASEGAWA, HIROSHI; KAKUNO, TSUTOMU; SHIOMI, YASUTOMO
	2018-03-01
专利权人	KABUSHIKI KAISHA TOSHIBA
公开日期	2018-03-01
授权国家	美国
专利类型	发明申请
摘要	A gas measuring apparatus includes a cell portion, a light source portion, a detection portion, and a control portion. The cell portion includes a space into which a sample gas containing breath containing a first isotope of carbon dioxide and a second isotope of carbon dioxide is introduced. The light source portion changes a wavelength of the light in a band of 4.345 μm or more and 4.384 μm or less. The detection portion performs an operation including first detection of an intensity of the light passing through the space and second detection of an intensity of the light passing through the space into which the sample gas is not introduced. The control portion calculates a ratio of an amount of the second isotope to an amount of the first isotope based on a result of the first detection and a result of the second detection.
其他摘要	气体测量装置包括电池部分，光源部分，检测部分和控制部分。电池部分包括空间，含有第二同位素二氧化碳和第二二氧化碳同位素的含有呼吸的样品气体被引入该空间。光源部分在4.345μm以上且4.384μm以下的带中改变光的波长。检测部分执行包括首先检测通过空间的光的强度和第二次检测通过未引入样品气体的空间的光的强度的操作。控制部分基于第一次检测的结果和第二次检测的结果计算第二同位素的量与第一同位素的量的比率。
主权项	A method for measuring a sampling gas containing a first isotope of carbon dioxide and a second isotope of carbon dioxide, comprising: emitting a light operable to sweep a wavenumber within a range of 1 cm−1 toward the sampling gas, the range including a first wavenumber corresponding to one of absorption peak of the first isotope, a second wavenumber corresponding to one of absorption peak of the second isotope and a third wavenumber corresponding to absorption peak of the first isotope or the second isotope, absorption of the first isotope at the second wavenumber not corresponding to absorption peak and being lower than absorption of the second isotope, the wavenumber being not less than 2281 cm−1 and not more than 2301 cm−1; measuring a first intensity of the light passing through the sampling gas within the range; and calculating a ratio of an amount of the second isotope to an amount of the first isotope based on the first intensity.
申请日期	2017-10-20
专利号	US20180059012A1
专利状态	失效
申请号	US15/788909
公开（公告）号	US20180059012A1
IPC 分类号	G01N21/3504 \| A61B5/08 \| G01N21/05 \| A61B5/00 \| H01S5/343 \| H01S5/34 \| G01N33/497 \| H01S5/125
专利代理人	-
代理机构	-
文献类型	专利
条目标识符	http://ir.opt.ac.cn/handle/181661/62322
专题	半导体激光器专利数据库
作者单位	KABUSHIKI KAISHA TOSHIBA
推荐引用方式 GB/T 7714	MAEKAWA, AKIRA,KUSABA, MIYUKI,TAKAGI, SHIGEYUKI,et al. Gas measuring apparatus. US20180059012A1[P]. 2018-03-01.