Gas Sampling Humidity Control for Aroma Sensing
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Solution Overview
Problem
Existing gas sensors face challenges in accurately measuring small amounts of target chemicals due to changing environmental parameters like temperature and humidity, especially when sensing multiple gases or aromas, as conventional methods either require complex data normalization or alter the sample composition by removing humidity.
Innovation Solution
A sensor system that controls temperature and humidity by using a humidifier and temperature-controlled chambers to maintain consistent conditions, allowing precise measurement of gas samples with saturated humidity and controlled temperature, thereby minimizing composition changes and ensuring accurate aroma sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If data normalization is used to compensate for changing humidity and temperature, then sensor response accuracy is improved, but measurement complexity increases significantly when multiple gases are targeted
Solution Approach 1:
The patent applies preliminary action by controlling humidity and temperature before the sensing measurement occurs. A humidifier pre-adjusts the humidity level of the sample gas, and a temperature-controlled chamber maintains stable temperature conditions before the gas reaches the sensor array, eliminating the need for complex post-measurement normalization
2Temperature
If desiccants are used to remove humidity from gas samples, then humidity control is improved, but sample composition is altered by chemical interaction
Solution Approach 1:
Instead of removing humidity from the sample gas as conventional approaches do, this patent inverts the approach by using a humidifier to add or maintain humidity at a controlled level. This non-chemical method adjusts humidity without desiccants, thereby preserving the original composition of the sample gas while achieving stable humidity conditions
3Device complexity
If environmental parameters are not controlled, then device simplicity is maintained, but measurement accuracy deteriorates due to changing conditions
Solution Approach 1:
The patent applies parameter changes by actively controlling the humidity and temperature parameters of the sample gas environment. A humidifier adjusts humidity levels, and a temperature-controlled chamber maintains stable temperature, creating consistent measurement conditions that improve accuracy without requiring complex normalization algorithms
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 provides consistent and accurate measurements of gas composition by maintaining controlled humidity and temperature levels, preventing alterations in the sample and enabling precise detection of multiple chemicals or aromas, unlike traditional methods that may chemically alter the sample or require complex normalization.
Implementation Method 1
a humidifier 120...maintain consistent conditions, allowing precise measurement of gas samples with saturated humidity
Implementation Method 2
temperature-controlled chambers to maintain consistent conditions, allowing precise measurement of gas samples with controlled temperature
Data Source
AI summary
A sensor system (100) or a sensing method minimizes the loss of aroma chemicals or other analytes in a sample gas while controlling the temperature and humidity of the sample gas. The system (100) may employ a humidifier (120) that adds water vapor to sample gas to provide a known water content, e.g., a saturated humidity at a known temperature. A sensing unit (130) may accurately measure the composition of the sample gas having a known water content, e.g., at a higher known temperature.