Adjacent Output Pin Monitoring for Short Detection
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Solution Overview
Problem
Existing methods for testing electronic modules, particularly inertial sensor packages, are inadequate in detecting shorted output pins, which can lead to inaccurate signals and potential vehicle stability issues in advanced braking systems.
Innovation Solution
A method involving sampling output signals from adjacent pins, calculating differences and rates of change, and comparing these parameters to decision criteria to determine if a shorted pin error flag should be set, with an optional feature requiring the error condition to persist before triggering the flag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If output pins are physically located next to one another to save space, then device compactness is improved, but the risk of pin shorting increases
Solution Approach 1:
The system performs preliminary monitoring of output pin signals by continuously sampling and analyzing signal characteristics (rate of change, ratios) to detect shorting conditions before they cause harmful effects. This proactive detection approach allows the system to identify pin shorts early in the operation sequence.
Solution Approach 2:
The system implements feedback by continuously monitoring the output pin signals, calculating parameters (rate of change, ratios), comparing them against thresholds, and setting error flags when shorting conditions are detected. This closed-loop feedback mechanism enables real-time detection and response to pin shorting events.
2Device complexity
If simple output pin monitoring is used, then device complexity is reduced, but detection precision of shorted pins deteriorates
Solution Approach 1:
The system transforms the detection approach by analyzing multiple signal parameters simultaneously - the rate of change of output signals and the ratio between signals from different pins. By monitoring these derived parameters in addition to raw signal levels, the system achieves more precise short detection without requiring complex additional hardware.
Solution Approach 2:
The system replaces physical inspection or simple continuity testing with electronic signal analysis. Instead of mechanical or basic electrical tests, the system uses microprocessor-based analysis of signal characteristics (sampling, differentiation, ratio calculation) to detect shorts, substituting complex physical testing methods with computational analysis.
3Reliability
If continuous monitoring of output pins is performed, then reliability of detection is improved, but use of energy increases
Solution Approach 1:
The system implements periodic monitoring by sampling output pin signals at predetermined time intervals rather than continuously. The microprocessor periodically calculates signal parameters and compares them against thresholds, maintaining reliable detection capability while reducing energy consumption compared to continuous real-time monitoring.
Data Source
AI summary
The rates of change and difference between signals sensed at adjacent electronic module output ports are determined and compared to criteria to determine whether the output ports are shorted.