Vehicle Position Error Detection via Yaw Rate Comparison
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods fail to effectively detect and compensate for creeping multipath effects in satellite navigation systems, leading to erroneous vehicle position determinations and interference with other sensor measurements.
Innovation Solution
A device comprising a sensor to determine the vehicle's yaw rate, a satellite navigation receiver to receive satellite signals, and a processor to compare the determined yaw rates to detect and correct for erroneous position determinations, using formulas to calculate yaw rates based on geographical positions and speed components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If satellite navigation receivers are used to determine vehicle position, then position information is obtained, but multipath effects cause erroneous position determinations
Solution Approach 1:
The patent introduces an intermediary detection mechanism that compares satellite-derived position data with sensor-derived position data. This intermediary comparison process identifies and filters out erroneous position determinations caused by multipath effects, thereby improving reliability while maintaining measurement precision.
Solution Approach 2:
The system implements feedback by continuously monitoring position determinations from both satellite navigation and sensors, comparing them in real-time, and using the comparison results to identify and correct erroneous satellite position data. This feedback loop ensures reliable position determination despite multipath interference.
2Loss of information
If satellite signals are processed to determine position, then position data is obtained, but creeping multipath effects cause position drift that is difficult to detect
Solution Approach 1:
The patent uses sensor-derived position information as an intermediary reference to detect creeping multipath effects. By continuously comparing satellite position data with sensor position data, the system can identify gradual position drifts caused by multipath effects that would be difficult to detect through satellite signals alone.
Solution Approach 2:
The system performs preliminary detection of position errors by comparing satellite and sensor data in real-time, before the creeping multipath effects accumulate into significant position drifts. This preliminary detection enables early correction of erroneous position determinations.
3Measurement precision
If satellite navigation position data is used for data fusion, then position estimation is improved, but erroneous satellite positions interfere with other sensor measurements
Solution Approach 1:
The patent introduces an intermediary filtering process that detects erroneous satellite position data through comparison with sensor data before these erroneous values are used in data fusion operations. This intermediary detection prevents harmful interference with other sensor measurements while maintaining the benefits of satellite navigation data fusion.
Solution Approach 2:
The system applies preliminary anti-action by identifying and filtering out erroneous satellite position determinations before they can interfere with other sensor measurements in the data fusion process. This preliminary filtering protects the integrity of sensor measurements while still allowing beneficial satellite data to be used.
Data Source
AI summary
A device and a method for detecting an erroneous determination of a geographical position of a vehicle. The device includes a sensor that is configured to determine a first yaw rate of the vehicle, a satellite navigation receiver that is configured to receive satellite signals during a predetermined time period, to determine a multiplicity of geographical positions of the vehicle on the basis of the received satellite signals, and to determine a geographical reference position of the vehicle on the basis of the multiplicity of geographical positions, and a processor that is configured to determine a second yaw rate of the vehicle on the basis of the determined geographical reference position of the vehicle, and to compare the first yaw rate with the second yaw rate in order to detect the erroneous determination of the geographical position of the vehicle.