Auto-switching Gas Sample Conditioning System
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Solution Overview
Problem
Conventional gas sampling and conditioning systems face issues with inaccurate Btu measurements and system disruptions due to upstream interruptions or inadequate pressure in gas sample lines, leading to labor-intensive manual adjustments and potential damage to gas chromatographs.
Innovation Solution
A multi-input auto-switching gas sampling and conditioning system that includes multiple gas sample input lines, a pressure switch, and a microcontroller to automatically control the flow and pressure of gas samples, ensuring continuous accurate analysis and maintaining adequate pressure and flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual adjustment of valve settings is used to switch between gas sample input lines, then system complexity is reduced, but labor time and response time increase significantly
Solution Approach 1:
The system performs self-service through the microcontroller automatically monitoring pressure levels and controlling valve switching without human intervention. The microcontroller continuously reads pressure sensor data and autonomously actuates the valve to switch between primary and secondary input lines when pressure thresholds are exceeded, eliminating the need for manual operator intervention while maintaining system simplicity.
Solution Approach 2:
The patent replaces manual mechanical adjustment with an automated control system consisting of a microcontroller, pressure sensor, and electrically actuated valve. The microcontroller substitutes human operators, the pressure sensor replaces manual pressure checking, and the electric valve replaces manual valve handling, thereby dramatically reducing labor time while adding controlled complexity to the system.
2Reliability
If multiple gas sample input lines are implemented to provide backup during pressure drops, then reliability improves, but device complexity and operational difficulty increase
Solution Approach 1:
The system segments the gas sampling function into multiple independent input lines (primary and secondary), each capable of providing gas samples independently. This segmentation allows the system to switch between segments when one becomes unreliable due to pressure drops, thereby improving overall reliability while adding manageable complexity through modular design.
Solution Approach 2:
The system implements beforehand cushioning by providing a pre-configured secondary input line that stands ready to take over immediately when the primary line experiences pressure drops. The valve is pre-positioned to allow rapid switching, and the secondary line is already connected and prepared, eliminating the need for emergency setup or complex reconfiguration when failures occur.
3Productivity
If automatic switching between gas sample input lines is implemented, then productivity and response time improve, but device complexity increases
Solution Approach 1:
The system implements feedback through the pressure sensor continuously monitoring the pressure level in the primary input line and providing real-time data to the microcontroller. When the pressure drops below a predetermined threshold, the feedback loop triggers the microcontroller to actuate the valve for switching to the secondary line, enabling automatic response that improves productivity while keeping the feedback mechanism simple and direct.
Solution Approach 2:
The automatic switching system performs self-service by autonomously monitoring its own operational status through pressure sensing and self-correcting by actuating the valve when needed. This self-service capability eliminates the need for external operator intervention, dramatically improving response time and productivity while maintaining relatively simple system architecture through autonomous operation.
4Ease of manufacture
If manual valve adjustment is used to deactivate problematic input lines, then ease of manufacture is maintained, but measurement precision and analysis accuracy deteriorate due to delayed switching
Solution Approach 1:
The system performs preliminary action by continuously monitoring pressure levels and being ready to switch input lines before inadequate pressure can compromise measurement precision. The pressure sensor and microcontroller are configured to detect pressure drops and trigger valve actuation proactively, preventing the collection of inaccurate samples rather than reacting after accuracy deteriorates, thereby maintaining measurement precision while keeping the manufacturing process relatively simple.
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 reduces labor and downtime by automatically switching between gas sample input lines, preventing inaccurate readings and system disruptions, while maintaining consistent gas flow and pressure for accurate analysis and industrial operations.
Implementation Method 1
a pressure switch configured to generate data representative of a pressure of the first gas sample
Implementation Method 2
a microcontroller in communication with the pressure switch and configured to control flow of the first and second gas samples from the first and second gas sample input lines based on the data from the pressure switch
Implementation Method 3
it is critical that the sampled gas be conditioned to the correct temperature and pressure to avoid partial or full phase change to a liquid phase before entering the gas chromatograph
Data Source
AI summary
A gas sample and conditioning device for sampling gas in storage or transport device and conditioning the gas while automatically switching between input lines based on a characteristic of the gas sample. Multiple input lines are provided within allows for flow between different input lines based on the characteristic of the gas sample.