Gas analyzer for measuring at least two components of a gas

一种气体分析器、气体的技术，应用在气体分析器的构造细目、分析材料、测量装置等方向

Inactive Publication Date: 2012-05-16
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The analyzer can be made quite small, but the structure allows wavelength tuning within only about 10% of the selected wavelength

Method used

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  • Gas analyzer for measuring at least two components of a gas
  • Gas analyzer for measuring at least two components of a gas
  • Gas analyzer for measuring at least two components of a gas

Examples

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Embodiment Construction

[0023] In the following detailed description referring to the accompanying drawings, specific embodiments are explained. These detailed examples can of course be modified and should not limit the scope of the invention as set forth in the claims.

[0024] A gas analyzer for measuring at least two components of a gas, such as breath gas, is described. Embodiments can be applied, for example, in mainstream types of clinical non-dispersive infrared multi-gas analyzers, but it can also be applied in other types of breath gas analyzers and gas analyzers that measure gases other than breath gas.

[0025]When measuring patient gases, especially in neonatal and pediatric situations, it is critical that gas analyzers be fast, small and lightweight. Mainstream gas analyzers for carbon dioxide only and known in the prior art are able to meet these criteria, but problems arise when multiple gases are to be measured in generally widely spaced wavelength regions. Gases with infrared absor...

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Abstract

A gas analyzer for measuring at least two components of a gas is disclosed herein. The gas analyzer includes an emitter (17) for being able to emit infrared radiation through the gas and a filter assembly (32) for allowing a transmission of predetermined wavelengths emitted by the emitter. The gas analyzer also includes a detector (31) for receiving wavelengths emitted by the emitter and penetrated through the filter assembly. The filter assembly comprises at least two tunable narrowband interference filters (33, 43) in series, each of the filters comprising two dielectric mirrors (35, 36 and 45, 46) and an air space (34, 44) between the two dielectric mirrors to tune one of the filters to different transmission band than another of the filters.

Description

technical field [0001] The present disclosure generally relates to gas analyzers for measuring at least two components of a gas. The gas analyzer includes an emitter capable of emitting infrared radiation through the gas, a filter assembly for allowing transmission of a predetermined wavelength emitted by the emitter, and a filter assembly for receiving the wavelength emitted by the emitter and passed through the filter assembly detector. Background technique [0002] In anesthesiology or in intensive care, for example, the condition of a patient is often monitored by analyzing the patient's exhaled breath to understand its content. To this end, a small portion of the breathing gas is delivered to a gas analyzer, or the gas analyzer is directly connected to a respiratory circuit. In non-dispersive infrared (NDIR) gas analyzers, the measurement is based on the absorption of infrared (IR) radiation in the gas sample. The radiation source directs the infrared radiation beam ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/35
CPCG02B5/284G01N33/004G01N21/314G01N33/497G01N2021/3137G01N2021/3185G01N2021/3177G01N21/3504
Inventor K·P·维克斯特隆H·A·M·哈弗里
Owner GENERAL ELECTRIC CO
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