Magnetic Float Liquid Level Indicator for Fire Suppression Cylinders
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Solution Overview
Problem
Existing fire suppression systems lack an effective method for accurately indicating the liquid level in clean agent cylinders, which is crucial for ensuring proper fire suppression without damaging equipment or structures, as existing methods are either invasive or lack precision.
Innovation Solution
A liquid level indicator system that includes a slide movable along a guide with Hall effect sensors or reed switches, which communicates the liquid level information to a readout, using a magnetic float and printed circuit board to provide continuous and accurate level readings within a defined fill range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing liquid level indication methods are used in fire suppression cylinders, then the system can indicate liquid level, but the methods are either invasive or lack precision
Solution Approach 1:
The patent replaces traditional mechanical float indicators with a magnetic field-based sensing system. Hall effect sensors and reed switches detect the position of a magnetic float through magnetic field interactions, eliminating the need for direct mechanical contact between the indicator components and the liquid, thereby achieving non-invasive measurement while maintaining precision
Solution Approach 2:
The patent introduces a magnetic float as an intermediary element that responds to liquid level changes and transmits this information to external sensors through magnetic field interactions. This intermediary enables indirect measurement, preventing direct contact between sensing elements and the liquid, thus avoiding contamination and damage while achieving accurate level indication
2Reliability
If temperature-induced fluctuations are not compensated, then the liquid level varies with temperature, but no compensation mechanism is needed if the indicator is properly designed
Solution Approach 1:
The patent employs a magnetic float that automatically responds to liquid level changes caused by temperature fluctuations. The float's position is continuously tracked by external magnetic sensors, and the system self-adjusts the reading to reflect the actual liquid level at any given temperature, eliminating the need for external compensation mechanisms while maintaining reliability
Solution Approach 2:
The magnetic sensing system provides continuous feedback on the float's position, which directly reflects the liquid level at current temperature conditions. This real-time feedback enables the system to automatically account for temperature-induced level variations without requiring separate compensation circuits or complex control algorithms
3Measurement precision
If a large number of sensing elements are used to cover the entire cylinder height, then complete liquid level monitoring is achieved, but the device complexity and cost increase
Solution Approach 1:
The patent extracts only the critical measurement zone by focusing sensing elements on detecting the float's position within the relevant liquid level range. Rather than deploying sensors along the entire cylinder height, the magnetic float and external sensors are positioned to monitor only the functional liquid level range, reducing the number of sensing elements while maintaining adequate monitoring coverage
Solution Approach 2:
The patent uses a movable magnetic float that dynamically responds to liquid level changes, allowing a single float with external magnetic sensors to continuously track the liquid level throughout its range. This dynamic approach replaces the need for multiple fixed sensing elements distributed along the cylinder, reducing device complexity while maintaining comprehensive monitoring capability
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
Enables precise monitoring of the liquid level in fire suppression cylinders, ensuring the system is filled to the correct level for effective fire suppression while avoiding damage, even with temperature-induced fluctuations, and reduces the number of sensing elements needed compared to prior art systems.
Implementation Method 1
The slide includes a plurality of sense elements configured to indicate a level of liquid. In a further example according to any of the foregoing examples, the sense elements are Hall effect sensors.
Implementation Method 2
In a further example according to any of the foregoing examples, the sense elements are reed switches.
Implementation Method 3
The inserting step includes providing the guide in a tube carrying a magnetic float, and inserting the tube into the cylinder.
Data Source
AI summary
A liquid level indicator for a fire suppression system includes a guide. A slide is selectively movable along the guide to a fixed position associated with a fill range. The slide includes a plurality of sense elements configured to indicate a level of liquid.