Alarm Signal Processing for Automotive Fault Detection
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Solution Overview
Problem
In automotive applications, existing systems face challenges in efficiently processing a succession of alarm signals, where individual alarms may be uncritical but indicate a major fault when occurring together, requiring immediate and appropriate responses to ensure safe operation.
Innovation Solution
A method and apparatus that compare a multiplicity of selected alarm signals with predefined alarm patterns to trigger or prevent responses, utilizing an analysis unit to determine and filter alarm signals and a response unit to generate appropriate signals based on pattern matches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual alarm signals are processed independently, then the response time for single alarms is fast, but the ability to detect critical fault patterns composed of multiple alarms is reduced
Solution Approach 1:
The system pre-defines alarm patterns that represent critical fault conditions before runtime. These patterns are stored in the alarm processing module, allowing the system to quickly compare incoming alarm sequences against known critical patterns without performing complex real-time analysis, thus improving detection accuracy while maintaining simplicity
Solution Approach 2:
The alarm processing function is segmented into distinct modules: an analysis unit that identifies and filters alarm signals, and a response unit that compares filtered alarms against predefined patterns and triggers responses. This modular segmentation improves reliability by dedicating specific functions to each module while keeping the overall system manageable
2Reliability
If all alarm signals are evaluated individually and responses are triggered for each alarm, then the response coverage is comprehensive, but unnecessary responses are generated for non-critical alarm sequences
Solution Approach 1:
Critical alarm patterns are predefined and stored before system operation. The response unit compares incoming alarm sequences against these pre-established patterns, triggering responses only when a match is found. This prevents unnecessary responses to non-critical alarm sequences while ensuring comprehensive coverage of actual safety threats
Solution Approach 2:
The system applies partial action by selectively triggering responses only for alarm sequences that match predefined critical patterns, rather than responding to every individual alarm. This filters out unnecessary responses while maintaining adequate safety coverage for genuine critical conditions
3Reliability
If the system waits for complete alarm sequences before responding, then false positives are reduced, but the response time for critical faults is delayed
Solution Approach 1:
By pre-defining critical alarm patterns, the system eliminates the need for complex real-time analysis of alarm sequences. The response unit can immediately compare incoming alarms against stored patterns and trigger responses without delay, achieving both fast response time and accurate fault detection
Solution Approach 2:
The system skips unnecessary analysis steps by directly comparing alarm sequences against predefined patterns. This allows the system to rapidly evaluate alarm sequences and trigger responses for critical faults without getting bogged down in complex real-time decision-making processes
Data Source
AI summary
A method for processing alarm signals is disclosed in which a multiplicity of selected alarm signals are first compared with a predefined alarm pattern. The multiplicity of the selected alarm signals are determined from the alarm signals. At least one response signal is then transmitted if the selected alarm signals match the predefined alarm pattern.