Gas Measuring Device Using Broadband Radiation and System Behavior Analysis
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Solution Overview
Problem
Existing gas measuring devices face challenges in determining the concentration of multiple target gases with high operational reliability, often leading to false alarms or missed detections due to environmental influences and the need for multiple measurement cells or wavelength filters.
Innovation Solution
A gas measuring device with a measurement chamber and a reference chamber, using broadband radiation that penetrates both chambers, where the system behavior is calculated using time-resolved measurement and reference signals to derive target gas information without requiring specific frequency bands or multiple detectors, thus compensating for environmental effects and aging radiation sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple measurement cells or wavelength filters are used to detect multiple target gases, then the capability to detect multiple gases is improved, but the device complexity increases
Solution Approach 1:
The patent applies a single measurement cell that can detect multiple target gases by utilizing broadband radiation and analyzing the spectral behavior of the radiation after passing through the gas sample. The system uses one measurement cell combined with a reference cell and broadband radiation source, eliminating the need for multiple measurement cells or wavelength filters while maintaining the capability to detect multiple gases through sophisticated signal processing and system behavior analysis.
2Ease of operation
If conventional gas measurement methods are used, then the detection process is simple, but operational reliability decreases due to false alarms or missed detections
Solution Approach 1:
The patent implements a feedback mechanism by using a reference cell filled with reference gas (free of target gases) to compare against the measurement cell containing the gas sample. The system continuously monitors the behavior of broadband radiation as it passes through both cells and uses this comparative feedback to identify target gases, eliminating false alarms and missed detections caused by environmental influences while maintaining operational simplicity.
Solution Approach 2:
The patent introduces a reference cell as an intermediary element that contains reference gas free of target gases. This reference cell serves as a mediator to compensate for environmental effects and radiation source variations by providing a baseline for comparison. The system analyzes the differences in radiation behavior between the measurement cell and reference cell to accurately detect target gases, significantly improving operational reliability without complicating the detection process.
3Measurement precision
If specific frequency bands are used for detection, then the measurement precision is improved, but the adaptability to environmental changes decreases
Solution Approach 1:
The patent employs broadband radiation that covers a wide frequency range rather than focusing on specific frequency bands. The system analyzes the spectral behavior of the radiation across the entire broadband range and uses the system behavior (transfer function) to identify target gases. This approach maintains measurement precision while improving adaptability to environmental changes, as the broadband approach allows the system to compensate for environmental influences through the reference cell comparison and system behavior analysis.
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
This approach allows for reliable detection of multiple target gases with reduced risk of false alarms, eliminating the need for multiple measurement cells or wavelength filters, and maintaining accuracy despite environmental changes and radiation source aging.
Implementation Method 1
Radiation emitted by the radiation source penetrates at least once the measurement chamber. Every target gas in the measurement chamber absorbs a part of the radiation that penetrates the measurement chamber.
Implementation Method 2
A detector on the measurement chamber measures an indicator of the intensity of the incident radiation or another indicator of the intensity of the radiation in the measurement chamber.
Data Source
AI summary
A gas measuring device (100) and a gas measuring process analyze a gas sample (Gp) from a spatial area (B) for target gas (Zg). A measurement chamber (2) is filled with the gas sample and a reference chamber (3) is filled with a reference gas (Rg). A radiation source (1) emits radiation [eW, s(t)] into the measurement chamber and the reference chamber. The target gas attenuates the radiation. A measurement detector (4) measures a measurement signal [y(t)], a reference detector (5) measures a reference signal [x(t)]. Both signals correlate with the radiation intensity in the respective chamber. A system behavior [G(s)] of a system model is calculated that is excited with the reference signal [x(t)] as the input signal and generates the measurement signal [y(t)] as the output signal in response. Information (Erg) about the target gases in the gas sample is determined by evaluating the system behavior.