Vehicle Roll Sensor Bias Detection for Recalibration Timing
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Solution Overview
Problem
Existing roll sensors in vehicles, such as accelerometers or gyroscopes, can drift significantly from accurate measurements between regular calibrations, especially when moved from one vehicle to another, leading to a need for a method to detect and compensate for roll sensor bias.
Innovation Solution
A system and method that utilizes a location-determining receiver and roll sensors to estimate vehicle positions and yaw changes, detecting roll measurements at specific points along a path plan, calculating a roll measurement delta, and evaluating it over an evaluation period to determine if recalibration is necessary if the delta exceeds a reference value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If roll sensors are used for detecting roll angle measurements in vehicles, then roll guidance and control can be achieved, but the sensors may drift or deviate significantly from accurate measurements between regular calibrations
Solution Approach 1:
The system continuously monitors roll sensor measurements and compares them against expected values derived from vehicle position and yaw data. When deviations exceed thresholds, the system triggers recalibration alerts, creating a feedback loop that maintains measurement reliability without requiring continuous manual calibration
Solution Approach 2:
The system performs self-diagnosis by automatically detecting when roll sensor bias has drifted beyond acceptable limits. The electronic data processor evaluates roll measurement deltas and autonomously determines when recalibration is needed, eliminating the need for external monitoring or manual inspection
2Adaptability or versatility
If roll sensors are transferred between vehicles, then sensor utility is maximized, but the sensors may have significant bias or drift requiring recalibration
Solution Approach 1:
The system performs preliminary evaluation of roll sensor measurements by comparing them against expected values based on vehicle position and yaw changes. This preliminary check occurs automatically upon sensor installation or transfer, identifying bias issues before they affect operational accuracy
Solution Approach 2:
The system replaces manual calibration procedures with an automated electronic evaluation system. The data processor automatically compares roll measurements against calculated expected values and triggers recalibration alerts, substituting mechanical calibration processes with electronic detection and notification
3Productivity
If regular calibration is performed based on timer expiration, then calibration is systematically maintained, but sensors may drift significantly between calibrations
Solution Approach 1:
The system supplements timer-based calibration scheduling with continuous feedback monitoring. By comparing actual roll measurements against expected values derived from position and yaw data, the system provides real-time feedback on sensor accuracy, enabling dynamic adjustment of calibration timing based on actual sensor performance rather than fixed intervals
Solution Approach 2:
The system transitions from static, time-based calibration scheduling to dynamic, performance-based scheduling. The calibration trigger becomes adaptive, responding to actual sensor drift conditions rather than following a predetermined timetable, allowing the system to optimize calibration frequency based on real-time sensor health
Data Source
AI summary
A roll sensor is configured to detect a first roll angle at a corresponding first point of a path plan of a vehicle, or its implement, based on the estimated current position. A roll sensor is configured to detect a second roll angle at a corresponding second point of a path plan of a vehicle, or its implement, based on the estimated current position. A data processor is configured to determine a roll angle delta or difference between the first roll angle and the second roll angle. If the roll angle delta is greater than a reference roll value, the roll angle delta is evaluated over an evaluation period. For example, if the roll angle is greater than the reference roll value for equal to or greater than a target percentage or target ratio for the evaluation period, the data processor is configured to designate the roll angle sensor for possible recalibration.