Backup Camera Trajectory Overlays Across Pickup Wheelbases
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Solution Overview
Problem
Vehicular cameras require multiple part numbers due to varying vehicle configurations, leading to a large number of inventory items, as overlays must be specifically programmed for different vehicle models and configurations.
Innovation Solution
A vehicular camera system with a processor and memory that receives input data on vehicle configuration and steering wheel angle to select and display appropriate overlays using a lookup table, reducing the number of required overlays and part numbers by utilizing common overlays across similar vehicle families.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate programming is used for different vehicle configurations, then overlay accuracy is improved, but the number of part numbers increases
Solution Approach 1:
The camera is designed with universal functionality to support multiple vehicle configurations through a single part number. The system uses a lookup table stored in memory that contains overlay parameters for different vehicle types (e.g., regular cab with short bed, regular cab with long bed, extended cab with short bed, extended cab with long bed). The processor automatically selects the appropriate overlay based on input data received from the vehicle, allowing one camera unit to serve multiple vehicle configurations without requiring separate programmed versions for each configuration.
2Ease of operation
If dynamic overlays are used to show vehicle trajectory, then driver assistance is improved, but computational requirements increase
Solution Approach 1:
The system performs preliminary action by pre-calculating and storing overlay parameters for various vehicle configurations in a lookup table during the manufacturing process. When the camera operates, the processor simply retrieves the appropriate pre-computed overlay parameters from memory based on the vehicle configuration input, rather than performing complex real-time calculations. This approach provides accurate dynamic overlays for driver assistance while keeping the computational requirements during operation minimal.
Data Source
AI summary
A vehicular backing up assistance system includes a rearview camera at a rear portion of a vehicle, the vehicle being a vehicle family member of a particular family of pickup trucks. The system receives first input data that corresponds to the vehicle configuration of the vehicle. When the vehicle is backing up, the system receives second input data corresponding to steering angle of the vehicle. The system displays a predicted trajectory of the vehicle at the in-cabin display as an overlay overlaying the images captured by the rearview camera being displayed at the in-cabin display. The overlay comprises a pair of guidelines that are spaced apart and that are appropriate to (i) the wheelbase of the vehicle configuration of a plurality of vehicle configurations of the particular family of pickup trucks the rearview camera is mounted at and (ii) a current steering angle of the vehicle.


