Gas Sensor Siloxane Traps Preventing Deposition
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Solution Overview
Problem
Siloxane-containing products, when exposed to combustion in gas sensors, are converted to silicon dioxide, leading to reduced efficiency, performance degradation, and eventual failure due to deposition within combustion elements.
Innovation Solution
A gas sensing device with a suspended gas sensing element and traps, such as hexamethyldisilazane, is used to capture Siloxane and silicon dioxide, preventing their deposition on combustion elements by positioning the traps on supporting structures or outside the gas sensing elements, thereby maintaining sensor efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If combustion is used to detect gases, then gas sensing capability is improved, but siloxane deposition causes performance degradation and failure
Solution Approach 1:
The patent introduces siloxane trap elements as intermediary components that capture siloxane molecules before they reach the combustion sensor elements. These traps act as mediators that intercept the harmful siloxane deposits, allowing the combustion sensor to continue functioning reliably without direct exposure to siloxane contamination.
Solution Approach 2:
The siloxane traps are positioned upstream or in proximity to the combustion sensor elements to perform preliminary capture of siloxane molecules. This preliminary action prevents siloxane from reaching the sensitive combustion elements before deposition can occur, thereby maintaining sensor performance over time.
2Duration of action of stationary object
If traps are added to capture siloxane, then sensor durability is improved, but device complexity increases
Solution Approach 1:
The siloxane trap elements are integrated within or around the combustion sensor structure in a nested arrangement. The traps are positioned to work within the existing sensor architecture, capturing siloxane in the gas flow path without requiring completely separate external systems. This nesting approach adds protection while minimizing overall structural 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
The solution effectively limits the deposition of Siloxane and silicon dioxide, enhancing the durability and performance of gas sensors by preventing performance degradation and extending their operational lifespan.
Implementation Method 1
one or more traps for trapping at least one out of Siloxane and silicon dioxide
Implementation Method 2
a semiconductor temperature sensing element that may be thermally coupled to the gas reactive element
Implementation Method 3
When siloxane-containing products are exposed to combustion, which is required in the combustion gas sensors
Data Source
AI summary
A gas sensing device, that may include a suspended gas sensing element, a frame that supports the suspended gas sensing element, and one or more traps for trapping at least one out of Siloxane and silicon dioxide. The suspended gas sensing element may include a gas reactive element that has a gas dependent temperature parameter, and a semiconductor temperature sensing element that is thermally coupled to the gas reactive element, and is configured to generate detection signals that are responsive to a temperature of the gas reactive element. The gas reactive element and the semiconductor temperature sensing element are of microscopic scale.