GPS Accuracy Testing Without Physical Relocation
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Solution Overview
Problem
Existing GPS device accuracy measurement methods require the device to be physically located at a specific test site, making it inconvenient for devices used in distant locations, such as vehicles.
Innovation Solution
A method to determine GPS device accuracy by comparing positional data points collected from vehicles traveling on roads to geo-data points, allowing for relative accuracy assessment without the need for the device to be at a specific location, using multiple discrete location and directional reports.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the GPS device is placed at a specific test location to measure accuracy, then the measurement precision is improved, but the ease of operation deteriorates because the device must be physically relocated to the test site
Solution Approach 1:
The patent uses geo-data points (reference data representing true road locations) to copy and compare against GPS data points without requiring physical relocation of the device. The system creates a virtual comparison framework where GPS readings are evaluated against pre-established geo-referenced road geometry data, eliminating the need to transport the device to specific test locations while maintaining measurement accuracy
Solution Approach 2:
The patent introduces geo-data points as an intermediary reference system between the GPS device and the measurement standard. Instead of directly comparing GPS readings to known test location coordinates (which requires device relocation), the system uses geo-data points that serve as a mediating reference framework, allowing accuracy assessment through data comparison rather than physical device positioning
2Ease of operation
If multiple discrete location reports are used for comparison, then the ease of operation is improved by eliminating physical relocation, but the device complexity increases due to data processing requirements
Solution Approach 1:
The patent segments the accuracy assessment process into discrete comparable elements: individual GPS data points are separated and compared against corresponding geo-data points. This segmentation allows the system to process multiple location reports independently, reducing the complexity of handling comprehensive datasets by breaking them down into manageable comparison units that can be processed systematically
Data Source
AI summary
Accuracy of a positioning device may be determined without requiring the device to be at any specific location, such as a test location. Instead of comparing the reported location and directional data to a known location and directional data, the present technology may use multiple discrete location and directional reports for comparison with the reported data at multiple locations. The multiple comparisons are used to assess the relative accuracy of the positional telematics system. The reported location may be a GPS location or from another positioning system.