Fault Detection Circuit Using Weighted Equivalence for Backup Switching
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Solution Overview
Problem
Complex systems often face challenges in detecting faults and failures in primary functionalities, leading to potential mal-performance, as existing methods lack effective criteria for assessing signal quality and switching to backup functionalities.
Innovation Solution
A method and system that calculate a mean equivalence level between measured and ideal operational parameters of primary functionalities, using a weighted comparison to identify faults and switch to backup functionalities, with specific formulas for equivalence calculation and threshold-based decision-making.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing fault detection methods are used, then system operation can be monitored, but fault detection accuracy is insufficient due to lack of effective assessment criteria
Solution Approach 1:
The patent transforms the fault detection approach by changing from simple threshold-based monitoring to a comprehensive parameter comparison method. It calculates equivalence levels across multiple operational parameters (signal strength, quality metrics, error rates) and uses weighted aggregation to determine overall system equivalence, thereby improving detection accuracy while maintaining reliability
Solution Approach 2:
The patent replaces traditional mechanical fault detection mechanisms with an information-processing-based equivalence calculation system. Instead of relying on hardware-level fault indicators, it substitutes a computational method that compares operational parameters against expected values and calculates equivalence levels to detect faults, achieving higher precision without compromising system reliability
2Reliability
If backup functionality is activated frequently, then system reliability is improved, but switching overhead and system complexity increase
Solution Approach 1:
The patent implements preliminary equivalence assessment of backup functionalities before they are needed. By pre-calculating and storing equivalence levels for backup systems during normal operation, the system prepares switching decisions in advance, reducing the complexity of real-time switching decisions and enabling reliable activation only when truly necessary
Solution Approach 2:
The patent introduces an equivalence calculation mechanism as an intermediary between the primary system and backup functionality. This intermediary computes a quantitative equivalence level that objectively determines when switching is appropriate, reducing arbitrary or overly frequent switching while maintaining system reliability through data-driven decisions
3Measurement precision
If comprehensive parameter monitoring is implemented, then fault detection accuracy improves, but measurement and processing requirements increase
Solution Approach 1:
The patent segments the fault detection process into distinct measurement and processing stages. It divides operational parameters into separate measurable quantities (signal strength, quality metrics, error rates) that can be independently monitored, then processes them through a structured equivalence calculation framework, reducing the complexity of comprehensive monitoring by breaking it into manageable segments
Data Source
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AI summary
A system includes a primary functionality and a backup functionality for the primary functionality. A measurement circuit measures operational parameter values of the primary functionality. A fault detection circuit determines a level of equivalence between the operation of the primary functionality and a reference functionality on a weighted comparison of the measured operational parameter values of the primary functionality to corresponding reference operational parameter values for the reference functionality If the equivalence determination fails to find equivalence, the fault detection circuit signals fault in the primary functionality and activates the backup functionality.