Vehicle Navigation Latency Correction via Predictive Positioning
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Solution Overview
Problem
Existing vehicle navigation systems display historical vehicle location information due to delays in processing GPS signals, leading to a need for a system that can predict and display the vehicle's position a predetermined time in the future to account for latency.
Innovation Solution
A system comprising a current location detection device, a vehicle speed sensor, a database of road network information, and a microprocessor that determines a future vehicle location based on current location and speed data, and displays a position identifier corresponding to that location, thereby correcting for latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system displays vehicle location information based on current GPS position, then the display shows accurate location data, but the information is delayed because it reflects where the vehicle was rather than where it will be
Solution Approach 1:
The system performs preliminary calculation of the vehicle's future position by combining current GPS position, speed, and heading data to predict where the vehicle will be at the time the displayed information becomes relevant. This allows the system to display location information proactively rather than reactively, showing addresses and points of interest before the vehicle arrives at them.
Solution Approach 2:
The system continuously monitors actual vehicle position, speed, and heading from GPS and sensor data, then compares this feedback with the predicted future position. This feedback loop allows the system to dynamically adjust predictions and maintain accurate location information display despite changes in vehicle behavior or processing delays.
2Productivity
If the system calculates and displays location information in real-time, then the information is timely, but processing delays cause the displayed address to be historical rather than predictive
Solution Approach 1:
The system performs preliminary calculations of future vehicle position and corresponding location information (addresses, points of interest) before they are needed for display. By pre-calculating where the vehicle will be and what information should be shown, the system eliminates the need to wait for processing to complete, thus maintaining both speed and accuracy.
Solution Approach 2:
The system dynamically adjusts location predictions based on real-time changes in vehicle speed, heading, and position. Rather than using static predictions, the system continuously updates its forecast of future location based on current sensor data, ensuring that displayed information remains accurate even as vehicle conditions change during the display update cycle.
Data Source
AI summary
A system for displaying vehicle location information in a vehicle includes a current location detection device configured to provide location data for a first location of the vehicle representing the vehicle's current location, a vehicle speed sensor configured to provide vehicle speed data and a database of road network information configured to include at least one of street names and addresses along the streets thereon. The location data may include a direction of travel for the vehicle. A microprocessor coupled to the current location detector, the vehicle speed sensor and the database, the microprocessor is configured to determine a second location of the vehicle at a predetermined time in the future based on the location data and vehicle speed data and to determine a position identifier corresponding to the second location of the vehicle. A display is coupled to the microprocessor and is configured to display the position identifier.