Vehicle Movement Determination Using Peer Vehicle IMU Filtering
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Solution Overview
Problem
Existing vehicle movement determination methods, such as dead reckoning using inertial measurement units (IMUs), are compromised by environmental conditions like road surface variations and strong winds, leading to inaccuracies in determining the vehicle's heading direction or position.
Innovation Solution
A method and system that utilize information from a second vehicle to identify and exclude sensor indications caused by environmental conditions, allowing for more accurate movement determination by correlating the movement of the first vehicle with the second vehicle and filtering out environmental influences using a processor and inertial measurement unit data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If dead reckoning technique using IMU is used to determine vehicle movement, then vehicle position and heading direction can be determined, but accuracy is compromised when environmental conditions like road surface variations or strong winds cause unintended vehicle movement
Solution Approach 1:
The patent uses a second vehicle as an intermediary to detect and communicate environmental conditions affecting the first vehicle. The second vehicle's IMU data serves as a mediator to identify environmental influences (like road surface variations or wind) that also affect the first vehicle, allowing the system to filter out these harmful effects from the first vehicle's movement determination.
Solution Approach 2:
The system implements feedback by continuously monitoring the second vehicle's movement data and using it to adjust the interpretation of the first vehicle's IMU readings. When environmental conditions are detected through the second vehicle's data, the system feeds this information back to correct or filter the first vehicle's position and heading calculations, improving accuracy despite environmental disturbances.
2Reliability
If sensor information from IMU is used for dead reckoning, then vehicle movement can be tracked, but environmental conditions cause changes in vehicle movement that affect the accuracy of heading direction determination
Solution Approach 1:
The second vehicle acts as a mediator to provide environmental condition information that helps validate and correct the first vehicle's IMU readings. By comparing the first vehicle's sensor data with the second vehicle's data under similar environmental conditions, the system can distinguish between intended vehicle movement and movement caused by environmental factors, thereby improving heading direction accuracy while maintaining dead reckoning reliability.
Data Source
AI summary
An illustrative example embodiment of a method of processing information regarding movement of a first vehicle based on information regarding movement of at least one second vehicle includes: receiving a communication from the second vehicle that includes information regarding movement of the second vehicle, determining that the movement of the second vehicle corresponds to movement of the first vehicle, identifying at least one feature of the movement of the second vehicle that indicates an environmental condition that affects the movement of the second vehicle, identifying a sensor indication of movement of the first vehicle that corresponds to the feature of the movement of the second vehicle, and excluding the identified sensor indication from information used to determine movement of the first vehicle.