Tire Sealing Liquid Level Sensing Using Internal Electrodes
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Solution Overview
Problem
The inability to monitor the level and properties of sealing liquid inside closed flexible structures like tubeless tires makes it difficult to control the quality and effectiveness of the sealing process, as the water content can evaporate over time, and existing methods are not reliable for measuring liquid levels within these sealed environments.
Innovation Solution
A device using electrodes inserted inside the tire to measure electric properties such as resistance or capacitance, which allows for real-time or positional measurement of the liquid level, employing a circuit with a voltage pulse to avoid disrupting the liquid and using resonators for dielectric liquids, ensuring accurate and non-invasive monitoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing liquid is used in closed flexible structures, then sealing effectiveness is improved, but the ability to monitor liquid level and properties deteriorates
Solution Approach 1:
The patent replaces mechanical level monitoring methods with electrical measurement methods. Electrodes are inserted through the valve stem to measure electrical properties (resistance, capacitance, or inductance) of the sealing liquid, enabling non-intrusive monitoring without compromising the sealed environment. This electrical substitution allows continuous monitoring while maintaining sealing integrity.
Solution Approach 2:
The patent uses electrical fields as an intermediary to monitor the sealing liquid properties. Instead of direct mechanical contact or opening the sealed structure, the measurement system uses electrical signals that can penetrate or interact with the liquid through the valve stem, providing indirect but accurate measurement of liquid level and properties without disrupting the sealed system.
2Measurement precision
If electrodes are inserted to measure liquid properties, then measurement precision is improved, but the risk of liquid breakdown and sedimentation worsens
Solution Approach 1:
The patent employs periodic or pulsed electrical measurement instead of continuous DC measurement. By using alternating current or pulsed signals, the system minimizes the time electrodes are exposed to high electrical stress, reducing electrolysis and chemical breakdown of the sealing liquid. This periodic action maintains measurement precision while minimizing harmful effects.
Solution Approach 2:
The patent changes the electrical parameters used for measurement, specifically using high-frequency alternating current or pulsed signals instead of low-frequency DC. This parameter change reduces the electrochemical impact on the sealing liquid while maintaining the ability to accurately measure electrical properties like resistance, capacitance, or inductance that correlate with liquid level and composition.
3Reliability
If continuous monitoring is implemented, then quality control is improved, but energy consumption increases
Solution Approach 1:
The patent implements periodic monitoring at predetermined intervals rather than continuous monitoring. The measurement system activates at specific time intervals or under specific conditions (such as when the vehicle is stationary), providing sufficient quality control data while significantly reducing energy consumption compared to continuous operation.
Solution Approach 2:
The measurement system is designed to operate autonomously using the vehicle's existing electrical system. The system can self-regulate its operation based on available power, vehicle state, and monitoring needs, optimizing energy usage while maintaining effective quality control through strategic measurement timing and utilizing existing electrical infrastructure.
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 measurement of the sealing liquid level and properties within the tire, allowing for improved quality control and monitoring of the sealing process, even as the liquid evaporates, by providing reliable and non-destructive assessment of the liquid's state.
Implementation Method 1
measuring the liquid electric properties such as resistance or capacitance
Implementation Method 2
measuring the liquid electric properties such as resistance or capacitance
Implementation Method 3
employing a circuit with a voltage pulse to avoid disrupting the liquid
Implementation Method 4
using resonators for dielectric liquids
Implementation Method 5
using resonators for dielectric liquids
Data Source
AI summary
A device for measuring a liquid level inside a tire that include two electrodes that are designed to be positioned inside the tire in such a way that they can be immersed inside the liquid that the tire may contain, and an electric circuit that is electrically connected to these electrodes. The device is designed to measure an electric property of the liquid between the electrodes while the intensity of the electric property depends on the liquid level inside the tire. The electric circuit is designed to output an electric value for the measured electric property as an output signal that can be used to calculate the level of the liquid inside the tire.