Driver Assistance Sensor Self-Diagnosis Using Reference Value Comparison
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Solution Overview
Problem
Driver assistance systems, particularly stereo systems, face challenges in maintaining precise sensor adjustments over their long service life, leading to potential malfunctions due to production defects or degradation, which can result in erroneous measurements that may go undetected.
Innovation Solution
A method and device for monitoring the function of driver assistance systems using existing sensor data, where measured variables are validated against stored reference values, allowing for real-time functional monitoring without additional test devices, using a combination of sensors to determine spatial extent, relative distance, and distance between objects, and utilizing historical data for comparison.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If functional monitoring is performed using complex additional test equipment or simulation procedures, then measurement precision and reliability improve, but device complexity and processing effort increase
Solution Approach 1:
The driver assistance system performs self-diagnosis by utilizing its own sensor data and processing capabilities to monitor its functional status. The system compares its measured values against reference values without requiring external test equipment, enabling autonomous functional monitoring that reduces complexity while maintaining monitoring accuracy
Solution Approach 2:
The existing sensor system serves dual purposes: it performs both the primary driver assistance function and the functional monitoring function. By reusing the same sensors and processing units for both operational tasks and self-diagnosis, the system eliminates the need for separate test equipment while achieving comprehensive functional monitoring
2Reliability
If real-time functional monitoring is implemented, then system reliability improves, but processing effort and time consumption increase
Solution Approach 1:
Reference values for functional monitoring are pre-calculated and stored in memory during system setup or manufacturing. This preliminary preparation allows the monitoring system to perform rapid real-time comparisons without requiring complex calculations during operation, thus maintaining high processing efficiency while ensuring reliable real-time monitoring
Solution Approach 2:
The system monitors only the most critical functional parameters and comparison metrics necessary for safety, rather than performing exhaustive analysis of all system components. This selective monitoring approach maintains system reliability for essential functions while minimizing processing overhead and maximizing productivity
Data Source
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AI summary
The invention relates to a method and a device for monitoring the function of a driver assistance system, the surroundings of a vehicle (20) being detected by means of at least one sensor (1,111, 121, 131) and sensor data of the vehicle surroundings (20) being generated, from said data, at least one measurement variable (B, D, R, R1, R2, X) is determined and is compared to reference values for said measurement variable (B, D, R, R1, R2, X). The result of the function monitoring is subsequently output and/or stored in accordance with the result of the comparison. No drawing text to be translated