Vehicle Environmental Sensor Calibration via Dynamic Movement Compensation
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Solution Overview
Problem
Environmental sensors on vehicles, especially those with suspended components, face calibration inaccuracies due to relative movements, leading to distorted sensor data in overlapping surveillance areas.
Innovation Solution
A method and apparatus that receive movement information to calibrate environmental sensors, compensating for vertical or tilting movements by adjusting calibration parameters, using sensors like leveling sensors, accelerometers, and IMUs to maintain accurate sensor data transformation between sensor and vehicle coordinate systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If environmental sensors are mounted on fixed positions of the vehicle, then the calibration can be performed once and remains stable, but the sensors become subject to relative movements when the vehicle component suspends, leading to calibration inaccuracy
Solution Approach 1:
The system continuously receives movement information from sensors (accelerometers, gyroscopes, suspension sensors) and dynamically adjusts calibration parameters based on detected vehicle movements. This feedback loop ensures calibration accuracy is maintained despite changes in sensor position due to suspension, braking, or acceleration events.
Solution Approach 2:
The calibration system transitions from a static, one-time calibration to a dynamic, continuous calibration process. The calibration parameters are updated in real-time based on vehicle movement conditions, allowing the system to adapt to changing sensor positions while maintaining accurate object detection and positioning.
2Adaptability or versatility
If environmental sensors are mounted on suspended vehicle components, then the sensors can accommodate vehicle movements, but the calibration becomes invalid or inaccurate due to relative movements
Solution Approach 1:
Movement sensors continuously monitor the position and orientation of suspended vehicle components, providing real-time feedback to the calibration system. This enables dynamic adjustment of calibration parameters to compensate for relative movements, maintaining measurement precision despite the flexibility of suspended mounting.
Solution Approach 2:
The system changes calibration parameters dynamically based on detected movement conditions. When movements exceed predetermined thresholds, the calibration parameters are adjusted to account for the new sensor position and orientation, ensuring accurate object detection and positioning despite suspended component movements.
3Measurement precision
If calibration parameters are adjusted dynamically based on movement information, then sensor data accuracy is maintained during vehicle operation, but the system complexity increases
Solution Approach 1:
The system uses intermediary sensors (accelerometers, gyroscopes, suspension sensors) to measure vehicle movements and an intermediary processing system to calculate and apply calibration adjustments. This intermediary layer simplifies the overall complexity by separating the measurement function from the calibration adjustment function, making the system more modular and manageable.
Data Source
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AI summary
A method for calibrating of an environmental sensor (12) of a vehicle (10) is disclosed. The environmental sensor (12) is mounted on a vehicle component (14) subject to a vertical or tilting movement (M) relative to ground (30) and configured to provide sensor data (330). The method includes the steps of receiving (S110) movement information (310) indicative of the vertical or tilting movement (M); and calibrating (S120) the environmental sensor (12) based on the received information (310) to compensate modifications in the sensor data (330) due the vertical or tilting movement (M).