Gas concentration quantitative analyzer

A gas concentration and analyzer technology, which is applied in the analysis of materials, material analysis by optical means, instruments, etc., can solve the problems of inability to correct dust, pollution interference of optical windows, and inappropriate real-time processing.
CN101226147AInactive Publication Date: 2008-07-23ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2008-07-23
Estimated Expiration
Not applicable ยท inactive patent

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Abstract

The invention discloses a gas density quantitative analyzer based on tunable diode laser absorption spectrum technique and state space theory, wherein the hardware portion is composed of an emitter, a receive system and a central processor or the like, the software portion uses Kalman filtering algorithm based on state space. The invention uses a laser beam with continuous frequency change generated by a tunable laser to scan the absorption peak of special gas, feeds the laser beam after the tested gas into a light-sensitive detector which obtains a refractive index relationship relative the laser beam of each frequency and gives strength spectrum data at relative wavelength to be sent to the central processor, uses the gas density analysis software in the central processor to model the spectrum data into a measurement equation and build a gas density state equation while sets density distribution stable along time, uses Kalman filtering algorithm to process and processes gas density robust inversion.
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Description

technical field

[0001] The invention relates to a gas concentration quantitative analysis device, in particular to a gas concentration quantitative analyzer based on tunable diode laser absorption spectrum technology and state space theory. Background technique

[0002] With the rapid development of iron and steel metallurgy, petrochemical, cement, power generation and other industries, the control of the process is becoming more and more important. On-line measurement of process gas concentration is an important means of process control. Traditional infrared spectrum online gas analyzers have many shortcomings: pretreatment is necessary, the speed is slow, and real-time measurement cannot be performed; cross-interference by background gas; cannot be corrected Dust, optical window pollution interference; many moving parts, need frequent maintenance, etc. These disadvantages make it impossible for traditional spectroscopic gas analyzers to perform real-time and continuous me...

Claims

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