Optical Fiber Liquid Level Sensing Without Ignition Risk
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Solution Overview
Problem
Existing methods for sensing liquid levels in containers, such as fuel tanks, pose safety risks due to the use of electrical devices and require careful design and maintenance to prevent ignition.
Innovation Solution
A system utilizing optical fibers as sensing elements within a container, coupled with a multiplexer and control unit, which determines liquid levels based on optical signals, allowing for safe and efficient liquid level sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical devices (capacitors, resistors, ultrasonic transducers) are used for liquid level sensing, then liquid level detection capability is achieved, but safety risks increase due to potential ignition sources
Solution Approach 1:
The patent replaces electrical sensing devices with optical fiber-based sensing elements. The optical fibers transmit light signals to detect liquid level changes through refractive index variations, eliminating electrical components that could generate ignition sources in hazardous environments. This substitution maintains detection capability while removing the harmful electrical ignition risk.
Solution Approach 2:
The patent introduces optical fibers as an intermediary medium between the sensing location and the signal processing system. The optical fibers carry optical signals through the hazardous environment without requiring electrical power or generating electrical fields, thus serving as a safe intermediary that enables detection without creating ignition risks.
2Ease of operation
If electrical sensing devices are used, then liquid level sensing function is provided, but device complexity and maintenance requirements increase
Solution Approach 1:
The patent replaces complex electrical sensing systems with simpler optical fiber-based systems. Optical fibers are inherently simpler in design, requiring no electrical connections, power supplies, or complex signal conditioning circuits. This substitution reduces both initial design complexity and ongoing maintenance requirements while maintaining the liquid level sensing function.
Solution Approach 2:
The optical fiber sensing system is inherently more self-service oriented, as the optical fibers require no external power, no electrical connections, and no complex calibration. The system can operate autonomously by utilizing the natural optical properties of the fibers and the liquid medium, eliminating the need for complex maintenance procedures required by electrical devices.
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 provides safe, efficient, and accurate liquid level sensing without electrical hazards, capable of detecting different liquids and monitoring system health, while reducing the need for complex maintenance.
Implementation Method 1
a plurality of sensing elements configured to sense a level of the one or more liquids within the container. In at least one example, the sensing elements are optical fibers
Data Source
AI summary
A system and a method include a container configured to retain one or more liquids. A liquid level sensor is disposed within the container. The liquid level sensor includes a plurality of sensing elements configured to sense a level of the one or more liquids within the container. In at least one example, the sensing elements are optical fibers.