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Temperature compensation of gas sensors

A technology of gas sensor and temperature compensation, which is applied in the construction details of gas analyzers, standard gas analyzers, and analysis of gas mixtures, etc.

Active Publication Date: 2017-02-22
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although the temperature adjustment of detectors 31 and 32 provides a stable, repeatable response to temperatures at or below the adjusted In the case of conditioned temperature, the temperature dependent response of detectors 31 and 32 precludes any target gas concentration measurement at unregulated high temperature

Method used

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Embodiment Construction

[0039] For the purposes of the present invention, the terms "radiation", "gas mixture", "non-absorbing", "absorbing", "radiation detector", "sensor", "controller" and "processor" and synonyms and related The terms are to be interpreted broadly as known in the art of the present invention.

[0040] In order to facilitate the understanding of the present invention, exemplary embodiments of the present invention will be provided herein, relating to such as Figure 5 The target gas detection processor 37, shown in , is used to implement a temperature compensation technique for measuring the target gas concentration of an absorbing gas mixture sample at an unregulated high temperature. In practice, target gas detection processor 37 employs the hardware, software, firmware, and / or circuitry required to implement the temperature compensation techniques of a particular embodiment of the present invention.

[0041] In one embodiment of the target gas detection processor 37, a software ...

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Abstract

A target gas sensor employing a radiation source (20) and a radiation sensor (30) includes a reference radiation detector (31), a target radiation detector (32), a temperature sensor (34), a temperature controller (35) and a target gas detection processor (37). In operation, radiation source (20) controls a propagation of radiation (RAD) through a gas mixture (GM) contained by an airway (10) to radiation sensor (30). Reference radiation detector (31) generates a reference detection signal (RD) indicative of a detected magnitude of a reference wavelength ([lamda]REF) of the radiation, and target radiation detector (32) generates a target detection signal (TD) indicative of a detected magnitude of a target wavelength ([lamda]TG) of the radiation. Temperature sensor (34) senses a temperature of radiation detectors (31, 32) whereby temperature controller (35) regulates a heating of the radiation detectors (31, 32) relative to a regulated detector temperature (TREG). Target gas detection processor (37) measures the target gas concentration within the sample of the gas mixture (GM) as a function of an absorbing spectral response ratio (SRRA) and a temperature compensation (TPC).

Description

technical field [0001] The present invention relates generally to gas sensors for measuring the concentration of a target gas in a sample of a gas mixture based on absorption spectroscopy, and more particularly to capnography for measuring the concentration of carbon dioxide ("CO2") in a sample of a gas mixture based on absorption spectroscopy. The present invention specifically relates to addressing the significant temperature dependence of spectral response by radiation detectors employed by gas sensors for measuring target gas concentrations in gas mixtures, such as lead selenide ("PbSe") based radiation detectors. sex. Background technique [0002] As known in the art, a radiation detector is any device for converting electromagnetic radiation into electrical signals. Many types of radiation detectors have a temperature-dependent spectral response, and gas sensors employ such radiation detectors to perform absorption spectroscopy for measuring the concentration of a spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/3504
CPCG01N21/3504G01N2201/1211G01N33/0006G01N33/004G01N21/31
Inventor E·P·格雷蒂
Owner KONINKLJIJKE PHILIPS NV
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