发明名称 |
APPARATUS FOR MEASURING A LEVEL OF A SPECIFIC GAS IN EXHALED BREATH |
摘要 |
There is provided an apparatus for measuring levels of a specified gas in exhaled breath, the apparatus comprising a photoacoustic sensor for providing a measurement representative of the level of the specified gas in the exhaled air, wherein the photoacoustic sensor comprises a light source that is modulated at a first frequency; a sound speed measurement module for measuring the sound speed of the exhaled breath, wherein the sound speed measurement module operates either at a second frequency that is substantially different to the first frequency or in a pulsed mode; wherein the first frequency of the modulated light source is adjusted during exhalation in accordance with the measured speed of sound of the exhaled breath. |
申请公布号 |
WO2011055286(A1) |
申请公布日期 |
2011.05.12 |
申请号 |
WO2010IB54912 |
申请日期 |
2010.10.29 |
申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V.;VAN KESTEREN, HANS WILLEM |
发明人 |
VAN KESTEREN, HANS WILLEM |
分类号 |
A61B5/08;G01H5/00;G01N21/17;G01N29/024;G01N29/24;G01N33/00;G01N33/497 |
主分类号 |
A61B5/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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