Vehicle Sensor Signal Processing for Pairwise Fault Detection
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Solution Overview
Problem
In autonomous driving systems, when multiple sensors detect the same target object, existing technologies face challenges in ensuring high safety guarantees and efficiently determining sensor failures, particularly when fewer than three sensors are operational.
Innovation Solution
A controller processes sensor signals by selecting pairs to identify value differences, excluding error signals, and using the remaining signals to determine a representative value for safe vehicle control, ensuring high safety guarantees even with 4 or more sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple sensors detect the same target object, then measurement redundancy is improved, but difficulty in determining sensor failure increases
Solution Approach 1:
The patent segments the failure detection process into pairwise comparisons. Instead of trying to analyze all sensors simultaneously, it divides them into pairs, compares each pair's value differences, and systematically identifies error sensors through this segmented approach.
Solution Approach 2:
The patent uses value differences between sensor readings as an indicator (analogous to color changes) to identify error sensors. When the difference between paired sensors exceeds a threshold, it signals a potential failure, making the detection process visually intuitive through numerical comparison.
2Device complexity
If three sensors are used for detection, then system complexity is reduced, but fault detection accuracy is insufficient
Solution Approach 1:
The patent segments the fault detection into systematic pairwise comparisons, making the complex process manageable. By dividing four sensors into two pairs and comparing their differences, the system achieves accurate fault detection without overwhelming complexity.
Solution Approach 2:
The patent uses four sensors instead of the minimum three, applying excessive action to improve fault detection accuracy. This additional sensor provides extra data points for comparison, enabling more accurate identification of failed sensors while maintaining manageable system complexity.
Data Source
AI summary
The present disclosure relates to an apparatus and method for processing a sensor signal, and a vehicle having the same. The apparatus according to an embodiment of the present disclosure is an apparatus applied to a vehicle, the apparatus comprising a plurality of sensors of a same type configured for detecting a same detection target object and generating a plurality of sensor signals with values; and a controller configured for determining usable sensor signals from among the plurality of sensor signals by using value differences among the sensor signals.