Capacitive Suppressant Level Detection in Fire Cylinders
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Solution Overview
Problem
Current methods for determining the level of clean agent in fire suppression cylinders are tedious and limited to welded cylinders, lacking efficiency and applicability to seamless cylinders.
Innovation Solution
A fire suppression system utilizing a capacitance-based method with electrodes in contact with both the suppressant and pressurant within the cylinder, including a siphon tube and cylinder wall as electrodes, to accurately measure the amount of suppressant through effective capacitance calculations and display the results on an electronic interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If magnetic float and reed switch based techniques are used to determine clean agent level, then the measurement can be obtained, but the process is tedious and limited to welded cylinders only
Solution Approach 1:
The patent replaces mechanical float and reed switch mechanisms with a capacitive sensing system that uses electrical fields to detect suppressant levels. This substitution eliminates the need for mechanical components that require specific cylinder welds, enabling universal application to both welded and seamless cylinders while simplifying the measurement process to automatic electronic detection.
Solution Approach 2:
The capacitive sensing system is designed to be universally applicable to different cylinder types (welded and seamless) by using electrical field interaction with the suppressant rather than mechanical components that require specific structural features. The system performs multiple functions including level detection, suppressant identification, and integration with various cylinder configurations through a single standardized interface.
2Reliability
If traditional sensors are used for welded cylinders, then suppressant level can be detected, but the same method cannot be applied to seamless cylinders
Solution Approach 1:
The patent replaces mechanical float-based sensors with a capacitive sensing system that uses electrical fields to detect suppressant levels. This substitution eliminates the need for mechanical components that require specific cylinder welds, enabling universal application to both welded and seamless cylinders while simplifying the measurement process to automatic electronic detection.
3Measurement precision
If capacitance-based sensing with siphon tube and wall electrodes is used, then accurate real-time monitoring is achieved, but device complexity increases
Solution Approach 1:
The system uses the existing siphon tube and cylinder wall as electrodes, eliminating the need for separate sensor components. The capacitive sensing circuit integrates multiple functions including level detection, suppressant identification, and communication into a single electronic system, reducing overall device complexity while maintaining measurement precision.
Solution Approach 2:
The system utilizes the existing structural components (siphon tube and cylinder wall) as functional elements of the sensing system. These components serve their original purposes while simultaneously acting as electrodes for capacitive measurement, eliminating the need for additional dedicated sensor parts and reducing system 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 solution provides accurate, real-time monitoring of suppressant levels in both seamless and welded cylinders, enhancing sensor reliability and ease of use, while being suitable for retrofitting existing systems with minimal infrastructure changes.
Implementation Method 1
A capacitance sensor may be disposed within the inner chamber and operable to measure a capacitance between the siphon tube and the cylinder wall
Implementation Method 2
the capacitance has an effective capacitance based on a first capacitance between the first and second electrodes with the suppressant as a dielectric medium, and a second capacitance between the first and second electrodes with the pressurant as a dielectric medium
Data Source
AI summary
An example fire suppression system includes a cylinder having a wall defining an inner chamber, and a processor operable to determine an amount of a suppressant in the inner chamber based on a capacitance between a first electrode and a second electrode that are both in contact with the suppressant. An example method for determining an amount of suppressant in a cylinder includes measuring a capacitance between a first electrode and a second electrode that are both in contact with a suppressant within a cylinder, and a determining an amount of suppressant within the cylinder based on the capacitance.