Occupancy Parameter Determination Using Counters and Dempster-Shafer Theory
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Solution Overview
Problem
Current driving assistance systems rely on occupancy grids for environmental perception, but they lack precision and safety mechanisms, leading to unreliable and unsafe driving assistance functionalities, particularly in determining the occupancy state of cells.
Innovation Solution
A method and system that determine current occupancy parameters by using past values, occupancy counters, and timeout counters, incorporating data from detection devices and a predictive model based on Dempster-Shafer theory to improve perception and safety, with mechanisms to handle indefinite and definite occupancy states and adjust security provisions accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If current driving assistance systems use occupancy grids based on detection devices, then environmental perception is provided, but precision and reliability of occupancy state determination deteriorates
Solution Approach 1:
The system performs preliminary actions by maintaining occupancy counters and timeout counters that track historical occupancy states before making current determinations. The occupancy counter accumulates evidence over time, and the timeout counter tracks how long an occupancy state has been maintained, enabling more reliable current state determination based on historical patterns.
Solution Approach 2:
The system implements feedback mechanisms where the determined occupancy state influences future counter updates. When an occupancy state is determined, the occupancy counter is updated to reflect this state, and the timeout counter is reset. This feedback loop allows the system to learn from past determinations and improve future accuracy, resolving the contradiction between precision and reliability.
2Reliability
If additional security mechanisms are added to monitor occupancy state changes, then safety of driving assistance functionalities improves, but device complexity increases
Solution Approach 1:
The system performs self-service by using its own internal counters (occupancy counter and timeout counter) to monitor and determine occupancy states without requiring external security mechanisms. The system leverages its existing detection devices and processing capabilities to automatically track occupancy changes, eliminating the need for additional complex security systems while maintaining safety.
3Measurement precision
If occupancy counter and timeout counter are used to track state changes, then precision of perception improves, but processing time increases
Solution Approach 1:
The system implements periodic action by updating counters at specific intervals or triggers rather than continuously. The occupancy counter is updated when new occupancy evidence is detected, and the timeout counter is reset periodically when occupancy state changes are confirmed. This periodic updating approach maintains precision while reducing processing time compared to continuous monitoring.
Data Source
Figure 1~2
AI summary
The invention relates to a method for determining a current value of an occupancy parameter relating to a portion of a space located in the vicinity of a motor-driven land vehicle as well as to a system and an associated motor-driven land vehicle.