Gas Detection Sensor Array with Separation Column
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Solution Overview
Problem
Existing gas detection systems in high-voltage devices filled with insulating medium are complex, maintenance-intensive, and prone to wear, particularly with valves and membranes that can break under pressure.
Innovation Solution
A device comprising a semi-permeable membrane, a separation column, and a sensor array, along with a valve with multiple operating states, allows for the detection of gases using a carrier gas that is enriched and measured, reducing the complexity and maintenance needs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional gas detection system with multiple individual sensors and valves is used, then the system can detect gases, but the system becomes complex and maintenance-intensive
Solution Approach 1:
Multiple individual gas sensors are merged into a single sensor array, where several sensing elements are integrated on one chip. This reduces the number of separate components while maintaining the ability to detect multiple gas types, thereby reducing system complexity and maintenance requirements while preserving measurement precision.
Solution Approach 2:
The gas detection function is segmented into different sensing elements within the sensor array, each capable of detecting specific gas types. This allows parallel detection of multiple gases through a single integrated component, reducing the overall system complexity while maintaining comprehensive gas detection capability.
2Ease of operation
If valves are used for air exchange in the gas detection system, then gas sampling can be controlled, but the valves wear out quickly and represent a weak point
Solution Approach 1:
The mechanical valve system is replaced with an electronic switching mechanism that controls gas flow through electronic signals rather than mechanical movement. This eliminates the mechanical wear associated with traditional valves, significantly improving reliability while maintaining the ability to control gas sampling operations.
3Measurement precision
If a flat membrane is used for gas enrichment, then the membrane can separate gases, but the membrane can rupture quickly under sudden pressure increases
Solution Approach 1:
The flat membrane is replaced with a hollow fiber membrane structure that has a curved, tubular geometry. This curved structure is inherently more resistant to sudden pressure increases and mechanical stress, preventing rupture while maintaining the gas separation and enrichment capability needed for precise measurement.
4Measurement precision
If multiple individual sensors are used for gas detection, then comprehensive gas analysis can be performed, but the device becomes expensive and requires more maintenance
Solution Approach 1:
Multiple individual gas sensors are merged into a single sensor array integrated on one chip. This consolidation maintains the comprehensive gas analysis capability by including multiple sensing elements, while significantly reducing the total number of components, manufacturing complexity, and associated costs.
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 provides a cost-effective, robust, and low-maintenance gas detection system that ensures safe and precise operation by utilizing a compact and efficient sensor array and separation column, minimizing the number of individual sensors required.
Implementation Method 1
a membrane (13) consisting of at least one semipermeable material, at least partially surrounded by the insulating medium (2), and at least partially exposed to the carrier gas (16)
Implementation Method 2
a separation column (19) is provided, which is arranged upstream of the gas sensor (12), and the gas sensor (12) is designed as a sensor array
Data Source
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AI summary
An apparatus (1) for detecting gas (4) in a high-voltage device (3) filled with an insulating medium (2) comprises an inlet (5) for introducing a carrier gas (16) and an outlet (6) for discharging a carrier gas (16); at least one gas sensor (12) for detecting a gas (4); a first pump (9) for delivering the carrier gas (16) in the apparatus (1); a membrane (13) which at least consists of at least one semipermeable material, is at least partially surrounded by the insulating medium (2) and is at least partially subjected to a flow of the carrier gas (16); a second pump (10) for delivering the carrier gas (16) into the apparatus (1) and for delivering the carrier gas (16) out of the apparatus (1); characterized in that a separation column (19) is provided upstream of the gas sensor (12) and the gas sensor (12 is in the form of a sensory array.