Vehicle Sensor Correction via Retrodiction and Forecasting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for determining the position of a motor vehicle, especially in situations with poor or no satellite reception, face challenges in accurately calculating correction values for sensors, leading to delayed compensation of localization errors.
Innovation Solution
A method that utilizes both forward and backward calculations to determine correction values for vehicle sensors, combining retrodiction and forecasting to improve accuracy, allowing for quicker and more precise position determination by averaging results based on the accuracy of each method.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If forward calculation is used to calculate correction values for sensors, then the calculation can be performed in the direction of time progression, but the correction values become unsuitable during downtime and accuracy is lost too long a period of time
Solution Approach 1:
The patent applies backward calculation (retrodiction) instead of only forward calculation to determine correction values. By calculating from a known second position back to the first position and comparing with the actually determined first position, the system can quickly recalculate accurate correction values when satellite reception resumes, significantly reducing the time to regain positioning accuracy compared to traditional forward calculation methods
2Measurement precision
If satellite navigation is used to determine vehicle position, then good accuracy can be achieved when satellite reception is available, but problems occur in situations with poor, disturbed or no satellite reception such as street canyons, tunnels or parking garages
Solution Approach 1:
The patent uses feedback from satellite navigation when available to determine accurate positions, which then serve as reference points for calculating correction values. These correction values are applied to sensor data to maintain positioning accuracy during periods when satellite reception is unavailable, creating a feedback loop that continuously updates and maintains system accuracy across varying reception conditions
Solution Approach 2:
The system performs preliminary calculation of correction values using backward calculation method during periods when satellite reception is available or just resumes. By preparing accurate correction values in advance (before the next period of poor reception), the system can quickly regain accurate positioning without waiting for forward calculation to accumulate sufficient data, thus improving reliability in poor reception areas
Data Source
AI summary
The disclosure relates to a method for determining correction values for a number of sensors of a traveling motor vehicle. The method being based on backward calculation. The disclosure further relates to a method for determining a position of a motor vehicle, using the correction values. The disclosure also relates to an associated electronic control device and to an associated non-volatile computer-readable storage medium.