Vehicle Trajectory Recording Using Sensor Fusion
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Solution Overview
Problem
Traditional GNSS-based vehicle trajectory recording methods, such as time interval sampling and continuous sampling, suffer from errors due to sampling intervals, leading to incomplete and inaccurate driving trajectories.
Innovation Solution
A vehicle trajectory recording system and method that utilizes angle detectors like gyroscopes, accelerometers, or torque sensors to detect changes in the vehicle's direction, combined with GNSS positioning, to accurately record and adjust driving trajectories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If time interval sampling method is used for trajectory recording, then device capacity consumption is reduced, but trajectory accuracy deteriorates due to sampling errors and missed turning events
Solution Approach 1:
The patent combines GNSS positioning data with sensor data (gyroscope, accelerometer, torque sensor) to detect driving events. The sensor detects vehicle direction changes and turning events, which are then integrated with GNSS position data to identify key trajectory points, resolving the contradiction between reduced sampling and maintained accuracy.
Solution Approach 2:
The system performs preliminary detection of driving events using sensors before final trajectory recording. By detecting turning events and direction changes in advance through sensor data analysis, the system can trigger position recording at critical moments, ensuring accuracy without continuous GNSS sampling.
2Measurement precision
If continuous sampling method is used for trajectory recording, then trajectory accuracy is improved, but device capacity consumption increases significantly due to excessive data collection
Solution Approach 1:
The patent extracts and identifies only the essential driving events (turning events, direction changes) from continuous sensor data streams. Instead of recording all continuous GNSS data, the system extracts key position points where driving events occur, maintaining trajectory accuracy while significantly reducing data volume and device capacity consumption.
Solution Approach 2:
The system uses partial action by recording positions only at critical driving events rather than continuous recording. The sensor continuously monitors for turning events, but GNSS position recording is triggered only when events are detected, providing sufficient trajectory information without excessive data collection.
3Device complexity
If time interval sampling method is used alone with point-to-point connection, then device complexity is reduced, but trajectory completeness deteriorates due to missed turning events and inaccurate path representation
Solution Approach 1:
The patent merges simple time interval sampling with sensor-based event detection. The system maintains the simplicity of interval sampling while adding sensor fusion to detect turning events, ensuring that critical trajectory information is captured without significantly increasing system complexity.
Solution Approach 2:
The system uses sensor feedback to detect driving events and trigger position recording. The gyroscope and accelerometer provide feedback about vehicle motion and direction changes, which feeds back to the control logic to determine when to record positions, ensuring trajectory completeness while maintaining manageable system complexity.
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 approach effectively reduces errors caused by interval sampling, providing accurate, complete, and clear driving trajectories by detecting turning events and adjusting the trajectory accordingly.
Implementation Method 1
the angle detector is a gyroscope
Implementation Method 2
the angle detector is an accelerator
Data Source
AI summary
A vehicle trajectory recording system and method for vehicles with a sensor is disclosed. The system includes a sensor arranged on a vehicle; a control module, electrically connected to the sensor and configured to receive a piece of sensing information from the sensor, analyze the sensing information to determine a traveling direction change event of the vehicle, and analyze the traveling direction change event and determine a driving event of the vehicle; and a recording module, electrically connected to the control module and configured to record a position of the vehicle where the vehicle performed the driving event, mark the position of the vehicle on a map where the driving event occurred, and adjust a driving trajectory of the vehicle.