Method for processing concentration signal of infrared gas sensor

A gas sensor and concentration signal technology, applied in the direction of color/spectral characteristic measurement, etc., can solve the problem of low detection accuracy

Inactive Publication Date: 2011-01-19
ZHONGBEI UNIV
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Problems solved by technology

[0015] In order to solve the problem that the detection accuracy of the gas concentration determination method used in the infrared gas sensor is not high, the present invention provides a method for processing the concentration signal of the infrared gas sensor

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  • Method for processing concentration signal of infrared gas sensor
  • Method for processing concentration signal of infrared gas sensor
  • Method for processing concentration signal of infrared gas sensor

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Embodiment Construction

[0069] The infrared gas sensor concentration signal processing method, the output signal of the infrared gas sensor is divided into the output signal U of the reference channel Ref. and detection channel output signal U Act. , two output signals U Ref. , U Act. Absorption rate of target gas to infrared light There are the following relations:

[0070] U Act . U Ref . = I I O - - - ( 1 )

[0071] I 0 : Incident light intensity, that is, the infrared light intensity of the infrared light source incident on the reference channel and the detection channel after being filtered by a narrow-band optical filter, generally measured under nitrogen conditions;

[0072] I: transmitted light intensity,...

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Abstract

The invention relates to an infrared gas sensor, in particular to a method for processing a concentration signal of the infrared gas sensor for precisely determining the concentration of a target gas. The invention solves the problem of low detection precision of the existing method for determining the concentration of the gas used by the infrared gas sensor. The method for processing the concentration signal of the infrared gas sensor corrects the following factors: 1, influence of the zero-position output ratio of the infrared gas sensor on the detection result in the absence of the target gas; and 2, influence of the non-absorption wave band on the detection result within the wavelength range of infrared light of an incidence detection channel; twice temperature compensations are implemented as follows: 1, introducing a temperature compensation parameter to realize real-time temperature compensation; and 2, realizing secondary compensation for the temperature influence in the ideal gas law; and finally obtaining the concentration of the target gas with a high detection precision. The method is reasonable and effective and can maximize the detection precision of the infrared gas sensor and meet the practical application requirements of the occasions with high requirements on the detection precision.

Description

technical field [0001] The invention relates to an infrared gas sensor, in particular to an infrared gas sensor concentration signal processing method for determining the target gas concentration with high precision. Background technique [0002] Existing infrared gas sensors mainly determine the gas concentration C of the detected target gas by data look-up table method, the theory is as follows: the output signal of the infrared gas sensor is divided into the output signal U of the reference channel Ref. and detection channel output signal U Act. , two output signals U Ref. , U Act. Absorption rate of target gas to infrared light There are the following relations: [0003] I 0 : Incident light intensity, that is, the infrared light intensity of the infrared light source incident on the reference channel and the detection channel after being filtered by a narrow-band optical filter, generally measured under nitrogen conditions; [0004] I: transmitted light intensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
Inventor 刘俊谭秋林张文栋王洪亮熊继军薛晨阳李锦明任勇峰秦丽
Owner ZHONGBEI UNIV
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