Multivariate Gas Dosimeter with Irreversible Sensing Material
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Solution Overview
Problem
Conventional chemical and biological sensors have limited capabilities in detecting multiple vapors and vapor mixtures, especially when interfered by substances at higher concentrations, leading to inaccurate measurements and interference effects.
Innovation Solution
A multivariate gas dosimeter system utilizing an irreversible sensing material with a resonant inductor-capacitor-resistor (LCR) sensor, which changes its electrical properties irreversibly upon analyte exposure, allowing for simultaneous detection of multiple vapors and correcting for environmental interference through multivariate analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an array of sensors with different sensing materials is used to detect multiple vapors, then the sensing capability is improved, but the fabrication complexity increases
Solution Approach 1:
The patent combines multiple sensing materials into a single integrated sensor device, allowing the detection of multiple vapors without requiring separate sensors for each material. This merging approach maintains the versatility of detecting different vapors while simplifying the fabrication process compared to creating arrays of individually fabricated sensors.
Solution Approach 2:
The sensor device is designed to perform multiple sensing functions simultaneously by incorporating different sensing materials that respond to different vapor types. This universal design allows a single sensor to detect multiple vapors, eliminating the need for separate specialized sensors and reducing overall fabrication complexity.
2Measurement precision
If highly selective sensors are used to detect specific vapors, then the measurement accuracy is improved, but the interference from other vapors increases
Solution Approach 1:
The patent segments the sensing function by using multiple distinct sensing materials, each selective for different vapor types. This segmentation allows the system to distinguish between target vapors and interferents by analyzing the differential responses of each sensing material, thereby maintaining high measurement accuracy while managing interference effects.
Solution Approach 2:
The sensor employs composite sensing materials with different selectivity characteristics. By combining materials that respond differently to target vapors versus interferents, the system achieves high detection accuracy for specific vapors while the composite nature provides inherent resistance to interference from other substances.
3Device complexity
If conventional sensors are used in complex vapor mixtures, then the device simplicity is maintained, but the measurement accuracy deteriorates
Solution Approach 1:
The patent merges multiple sensing materials into a single integrated sensor platform, maintaining device simplicity while enabling accurate detection in complex vapor mixtures. The unified sensor design avoids the complexity of multiple separate sensors while achieving the measurement accuracy needed for discriminating target vapors from interferents.
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
The system achieves high selectivity and sensitivity in detecting multiple vapors and mixtures, even in the presence of interferents, with faster acquisition times and the ability to track analyte concentration over time, enhancing the detection of low concentrations and reducing interference effects.
Implementation Method 1
an irreversible sensing material. Electrical properties of the irreversible sensing material are configured to change irreversibly upon exposure to the analyte
Data Source
AI summary
Methods and sensors for selective fluid sensing are provided. A gas dosimeter includes a housing configured with an opening to admit an analyte. The gas dosimeter also includes a multivariate sensor disposed in the housing. The sensor is configured to determine a concentration of the analyte over time. In addition, the multivariate sensor includes an irreversible sensing material. Electrical properties of the irreversible sensing material are configured to change irreversibly upon exposure to the analyte.