Odor Measuring Device Gas Circulation System
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Solution Overview
Problem
Existing odor measuring devices face challenges in detecting odors with low concentrations due to insufficient sensitivity and interference from disturbances, and lack a stable method for measuring such odors.
Innovation Solution
The odor measuring device includes a sensor chamber, a treatment chamber, and a gas circulation system with flow paths and a supplier, which circulates gas between the sensor chamber and the treatment chamber to enhance odor detection sensitivity and stability, particularly for low-concentration odors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional odor measuring methods are used, then the device structure is simple, but the sensitivity is insufficient for detecting low-concentration odors
Solution Approach 1:
The device is divided into multiple functional chambers: a treatment chamber for odor concentration and a sensor chamber for detection. This segmentation allows each chamber to perform its specific function optimally, improving overall detection sensitivity while maintaining manageable device complexity
Solution Approach 2:
The sensor chamber is positioned within or adjacent to the treatment chamber, creating a nested configuration where the sensor chamber utilizes the concentrated odor environment created by the treatment chamber, thereby enhancing detection sensitivity without proportionally increasing device volume
2Reliability
If conventional odor measuring methods are used, then the operation is simple, but the measurement stability is poor due to disturbance influence
Solution Approach 1:
The gas circulation system continuously moves gas between the treatment chamber and sensor chamber, ensuring that odor molecules are constantly presented to the sensor. This continuous action improves measurement stability by maintaining a consistent odor concentration at the sensor, reducing the influence of disturbances
Solution Approach 2:
The circulation system creates a closed-loop configuration where gas flows from the treatment chamber to the sensor chamber and returns. This feedback mechanism ensures that odor molecules are repeatedly exposed to the sensor, enhancing detection reliability and stability
3Measurement precision
If gas is circulated between chambers, then the odor detection sensitivity improves, but the device complexity increases
Solution Approach 1:
The flow paths serve multiple functions: they transport gas between chambers, enable odor concentration, and facilitate continuous sensor exposure. This multi-functionality improves detection sensitivity while minimizing the need for additional separate components, thereby controlling device complexity
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 configuration stabilizes detected values from odor sensors, improving the accuracy of odor identification even at low concentrations, allowing for reliable measurement of odors that were previously difficult to detect.
Implementation Method 1
The supplier delivers a gas in the treatment chamber to the sensor chamber through the flow path
Implementation Method 2
When an odor substance is adsorbed to a sensitive portion of the odor sensor, the electrical characteristic of the odor sensor is changed
Data Source
AI summary
An odor measuring device includes a sensor chamber that stores a sensor detecting an odor substance and has a first inlet and a first outlet, a treatment chamber that stores a measurement object and has a second inlet and a second outlet, a first flow path that connects the first outlet and the second inlet, a second flow path that connects the second outlet and the first inlet, a supplier that circulates a gas between the sensor chamber and the treatment chamber through the first flow path and the second flow path, and a measurer that acquires a detected value from the sensor and measures an odor based on the detected value.