Vehicle Location Correction Using Roadside UWB Devices
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Solution Overview
Problem
Satellite-based navigation systems, like GPS, can be unreliable in dense urban environments, tunnels, and covered parking structures, leading to inaccuracies in vehicle location data, which can affect vehicle navigation and safety.
Innovation Solution
A system that uses roadside devices with ultra-wideband (UWB) transceivers to communicate with vehicles, allowing them to determine a location correction adjustment by measuring UWB signals, and applying triangulation models to calculate distances and orientations, thereby refining the vehicle's location and adjusting its navigation system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If satellite-based navigation systems are used for vehicle location, then navigation coverage is improved, but location accuracy deteriorates in dense urban environments, tunnels, and covered parking structures
Solution Approach 1:
The patent introduces roadside devices as intermediary elements between satellite-based navigation systems and vehicles. These devices receive location data from satellites and transmit corrected location information to vehicles via UWB communication, serving as a mediator that compensates for satellite signal failures in challenging environments while maintaining broad navigation coverage
Solution Approach 2:
The navigation system is segmented into multiple independent components: satellite-based navigation for broad coverage and roadside devices for localized accuracy correction. This segmentation allows the system to use satellite data when available and switch to or supplement with roadside device data when satellite signals are unreliable, resolving the contradiction between coverage area and location accuracy
2Measurement precision
If roadside devices with UWB transceivers are deployed to improve location accuracy, then vehicle location precision is improved, but device complexity and infrastructure requirements worsen
Solution Approach 1:
The roadside devices are designed with multi-functionality, serving both as location correction beacons and as V2X communication nodes. By integrating UWB transceivers with existing roadside infrastructure, the system achieves location accuracy improvement without proportionally increasing device complexity, as single devices perform multiple functions
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enhances vehicle location accuracy and navigation by compensating for satellite system failures, improving safety and mobility in challenging environments.
Implementation Method 1
calculate a distance between the roadside device and the at least one vehicle sensor by measuring a ultra-wideband (UWB) signal at least one vehicle sensor
Implementation Method 2
determine a location of the vehicle based on the calculated distance; determine a location correction adjustment, wherein the location correction adjustment comprises a difference between an assumed location of the vehicle and the determined location of the vehicle
Data Source
AI summary
A system comprises a computer including a processor and a memory. The memory storing instructions executable by the processor to cause the processor to detect a roadside device via at least one vehicle sensor of a plurality of vehicle sensors; determine a location of a vehicle based on a fixed location of the roadside device; determine a location correction adjustment, wherein the location correction adjustment comprises a difference between an assumed location of the vehicle and the determined location of the vehicle, wherein the assumed location is obtained from a navigation system of the vehicle; and adjust the assumed location based on the location correction adjustment.