Laser Gas Analysis Device Using Polynomial Reconstruction
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Solution Overview
Problem
Existing gas analysis methods using computed tomography (CT) technology face challenges in accurately reconstructing two-dimensional images of combustion states in real-time due to the time required for analyzing measurement target gases with multiple optical paths.
Innovation Solution
A gas analysis device and method utilizing a laser light source, splitter, irradiation unit, photoreceivers, and analyzer to analyze the physical state of measurement target gases in two-dimensional or three-dimensional regions by determining coefficients of multi-dimensional polynomials based on received laser beam intensities, enabling rapid and accurate analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a large number of optical paths are provided for accurate two-dimensional image reconstruction using CT technology, then measurement precision is improved, but analysis time increases
Solution Approach 1:
The patent extracts only the necessary number of optical paths required for adequate reconstruction quality, removing the excessive paths used in conventional CT methods. By selecting a minimal sufficient set of measurement paths, the system achieves acceptable reconstruction accuracy while significantly reducing the number of measurements needed, thereby shortening analysis time without requiring a large number of optical paths.
2Measurement precision
If conventional CT technology is used for two-dimensional image reconstruction, then measurement precision is improved, but productivity decreases
Solution Approach 1:
The patent removes the time-consuming CT reconstruction process and extracts only the essential measurement functionality. By directly determining combustion state parameters from a minimal set of laser absorption measurements without full CT reconstruction, the system maintains measurement precision while dramatically improving productivity and enabling real-time combustion state determination.
Solution Approach 2:
The patent skips the intermediate CT reconstruction step that conventional methods require. Instead of performing complete two-dimensional image reconstruction and then deriving combustion parameters, the system directly calculates combustion state parameters from the measured absorption data, rushing through the analysis process to achieve real-time capability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and rapid analysis of measurement target gases, allowing for real-time determination of combustion states, which is particularly beneficial in fields where combustion conditions change rapidly.
Implementation Method 1
an absorption spectroscopy is a measurement method utilizing property that gas molecules absorb infrared light having a wavelength unique to a chemical species
Implementation Method 2
measurement technologies utilizing a semiconductor laser absorption spectroscopy
Implementation Method 3
a plurality of photoreceivers each configured to receive a laser beam having passed through the measurement region, and output an electric signal in accordance with intensity of the received laser beam
Data Source
AI summary
A gas analysis device includes a laser light source configured to output a laser beam, an irradiation unit configured to irradiate a measurement region including measurement target gas with the laser beams in plural directions, plural photoreceivers each configured to receive a laser beam having passed through the measurement region and output an electric signal according to intensity of the received laser beam, and an analyzer configured to analyze the physical state of the measurement target gas based on the electric signal output from each photoreceiver. The analyzer sets a function (e.g. two-dimensional polynomial f(X,Y)) representing the physical state (e.g. concentration, temperature) of the target gas at least in the measurement region, and measures the physical state of the target gas by determining a coefficient of each of terms included in the function based on a measured value obtained from the electric signal output from the photoreceiver.