Brake Lining Wear Detection via Phase-Transition Material
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Solution Overview
Problem
Existing brake and clutch lining temperature and wear detection systems are complex, requiring laborious signal evaluation and are prone to failure due to high temperatures causing adhesion layer softening and detachment.
Innovation Solution
Incorporating an electrically conductive material with a phase-transition temperature within the critical range in the friction lining, which changes resistance upon phase transition, allowing for simple and direct detection of critical operating temperatures and wear boundaries through measurable electric signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If complex multistage detection systems with series-connected resistors are used to determine temperature and wear, then measurement capability is provided, but device complexity and signal evaluation effort increase significantly
Solution Approach 1:
The patent extracts the temperature detection function from the complex multistage system by incorporating a separate melting material with a specific melting point into the friction lining. This material melts at a predetermined temperature to create an electrical connection, directly indicating critical temperature without requiring complex signal evaluation for temperature assessment.
Solution Approach 2:
The patent changes the physical state parameter of the melting material from solid to liquid at a specific temperature threshold. This phase transition creates a measurable electrical connection that directly indicates critical temperature, simplifying the detection mechanism while maintaining measurement precision.
2Power
If high-temperature operation is permitted to maintain braking performance, then braking effectiveness is improved, but risk of adhesion layer softening and catastrophic failure increases
Solution Approach 1:
The patent applies preliminary anti-action by incorporating a melting material that proactively responds before catastrophic failure occurs. When the friction lining approaches critical temperature, the melting material melts to create an electrical connection, providing early warning that allows preventive action before the adhesion layer softens or detaches.
Solution Approach 2:
The melting material is pre-positioned within the friction lining at a location that ensures it will melt at the critical temperature threshold. This preliminary arrangement enables the system to detect approaching danger conditions before they manifest as actual failures, allowing timely intervention to maintain reliability.
3Measurement precision
If comprehensive signal processing and networked information evaluation are implemented to determine temperature and wear, then detection accuracy is improved, but processing time and system cost increase
Solution Approach 1:
The melting material serves itself as both the temperature sensor and the indicator mechanism. When it melts at the critical temperature, it automatically creates an electrical connection that directly indicates the temperature condition, eliminating the need for external processing systems to interpret complex signals.
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, cost-effective, and reliable detection of critical temperatures and wear boundaries without complex signal processing, preventing catastrophic failures by initiating timely warnings or counter-measures.
Implementation Method 1
an electrically conductive material is provided in at least one place in the friction lining, whereby the phase-transition temperature of said material falls within the range of the critical operating temperature of the friction lining that is to be ascertained or detected
Implementation Method 2
the phase-transition temperature of said material falls within the range of the critical operating temperature of the friction lining that is to be ascertained or detected
Data Source
AI summary
A brake or clutch lining (10; 12) has a friction lining (22) arranged on a carrier plate (20). For purposes of detecting a critical operating temperature, an electrically conductive material (24) that has a phase-transition temperature that falls within the range of the critical operating temperature of the friction lining to be detected is provided in at least one place in the friction lining (22).