Multi-component Gas Analysis via Density and Spectrometry
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Solution Overview
Problem
Conventional multi-component gas analysis systems face challenges in continuously measuring the component ratios of gases that do not absorb infrared light, such as hydrogen and nitrogen, when multiple such components are present, as spectrometric analysis devices are limited in their measurement capabilities.
Innovation Solution
A multi-component gas analysis system that combines a spectrometric analysis device with a density measurement device, pressure measurement device, and a calculation and control device to determine the component ratios of unmeasurable components by using the analysis results from the spectrometric device and density measurements, allowing for continuous analysis even when multiple components cannot be analyzed by the spectrometric device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a spectrometric analysis device is used to measure gas components, then measurement speed is improved (several seconds), but measurement capability is limited to components that absorb infrared light
Solution Approach 1:
The patent combines a spectrometric analysis device with a density measurement device to create a hybrid analysis system. The spectrometric device measures components that absorb infrared light, while the density measurement device measures the density of the gas mixture. By merging these two measurement approaches, the system can determine both the measurable components (via spectrometry) and the unmeasurable components (via density calculation), thereby expanding measurement capability while maintaining fast measurement speed.
Solution Approach 2:
The patent introduces density measurement as an intermediary parameter to indirectly determine the composition of gas components that do not absorb infrared light. Instead of directly measuring these unmeasurable components, the system uses density as a mediator: the density measurement device measures overall gas density, the spectrometric device measures measurable components, and through calculation, the unmeasurable components are derived from the difference between measured and calculated density values.
2Measurement precision
If a gas chromatograph is used to measure multiple gas components, then measurement accuracy is improved, but measurement time increases to several minutes
Solution Approach 1:
The patent segments the measurement task into two parts: (1) fast measurement of components that absorb infrared light using the spectrometric device, and (2) calculation-based determination of components that do not absorb infrared light using density measurement results. This segmentation allows the system to achieve comprehensive multi-component analysis with fast measurement speed comparable to spectrometry, rather than requiring the slow but comprehensive gas chromatography process.
3Productivity
If only spectrometric analysis is used, then continuous analysis capability is achieved, but inability to measure components that do not absorb infrared light remains
Solution Approach 1:
The patent changes the measurement parameter from purely optical (spectrometric absorption) to include physical property (gas density). By incorporating density measurement, the system gains access to additional information about gas composition that cannot be obtained through infrared absorption alone. This parameter change enables continuous analysis while recovering information about unmeasurable components through the relationship between density and gas composition.
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 continuous measurement of component ratios for all components in a multi-component gas, including those that do not absorb infrared light, by using density measurements to calculate the ratios of unmeasurable components, thereby overcoming the limitations of traditional spectrometric analysis.
Implementation Method 1
the spectrometric analysis device measures the concentration of the component contained in the multi-component gas based on the absorbance of light
Implementation Method 2
a density measurement device that measures a density of the multi-component gas
Data Source
Figure 1
Figure 2
AI summary
A multi-component gas analysis system (1) includes a spectrometric analysis device (11) configured to obtain ratio of each of first components in a multi-component gas based on an absorption spectrum of light that has transmitted through the multi-component gas; a density measurement device (12) configured to measure a first density of the multi-component gas; and a calculation device (15) configured to calculate a ratio of each of second components in the multi-component gas using the ratio of each of the first components obtained by the spectrometric analysis device and the first density measured by the density measurement device, the second components being components that cannot be obtained by the spectrometric analysis device.