Optical absorbance measurements with self-calibration and extended dynamic range

An optical absorption, absorptivity technique used in the field of performing optical absorption measurements and systems

Active Publication Date: 2014-07-16
ENDRESS + HAUSER OPTICAL ANALYSIS INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, each of the above techniques includes limitations that make them less suitable for providing optical measurement accuracy and / or precision over a wide dynamic range

Method used

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  • Optical absorbance measurements with self-calibration and extended dynamic range
  • Optical absorbance measurements with self-calibration and extended dynamic range
  • Optical absorbance measurements with self-calibration and extended dynamic range

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Embodiment Construction

[0023] Due to the sensitivity of harmonic linear on the change of background gas composition, another potential problem may occur in the preparation spectrum analyzer.Different gases in the background flow may have a different impact on harmonic linear.Regarding the calibration of the analyzer, the harmonic linear directly determines the accuracy of the measurement gas measurement.The changes in the linear caused by the interaction of the metering gas and other gas in the entire stream are called collision and width.For example, if the user wants to change to measuring pure o 2 , Air or CO 2 If the water and gas are in the water, it is to measure pure N 2 2F -based analyzers calibrated by water and gas may need to return to the manufacturer to re -calibrate.Different quality and structure of the background molecules may have a great impact on 2F line -shaped, so it has a great impact on the concentration reading.As an example, when the selected frequency modulation amplitude, the ...

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Abstract

Detector data representing the intensity of light emitted from a light source and impinging on a detector after passing a certain path length through the gas may be analyzed using a first analysis method to obtain a first estimate of the analyte concentration in the volume of gas. calculating, and analyzing the detector data using a second analysis method to obtain a second calculation of the analyte concentration. The second calculation may be promoted to an analyte concentration when it is determined that the analyte concentration is outside the first target range of the first analytical method.

Description

[0001] Cross reference for related applications [0002] The name applied for this application on June 12, 2009 is "Online Self-Calibration Optical Absorpt Dynamic Range, which is an extended dynamic range."The rights of the case are incorporated into this article in the way of reference. Technical field [0003] Generally speaking, the theme described in this article involves the measurement of optical absorption, and it is more specifically that it involves the specific implementation method of providing self -calibration capabilities and extended dynamic measurement range for optical absorption sensors. Background technique [0004] Various spectral technologies have been proven and will continue to use trace gas detection with a variety of light sources.The two types of absorption spectrum that can be used for this measurement are directly absorbing spectrals and modulation spectral methods.Although there are some different principles, both technologies can be used to measur...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/42G01N21/25
CPCG01N21/39G01N21/274G01J3/433G01N2021/399G01N21/3504G01N21/05G01N2021/354G01J3/02G01J3/42G01J3/4338G01J2003/4332G01J2003/4334G01N21/031
Inventor 刘翔A·法伊蒂施X·周
Owner ENDRESS + HAUSER OPTICAL ANALYSIS INC
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