Work Vehicle Speed Calibration via Spatial Locating Feedback
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Solution Overview
Problem
Work vehicles face inaccuracies in speed calibration due to incorrect rolling circumference measurements, leading to incorrect top speed limitations, which can reduce operational efficiency and require manual updates or external intervention.
Innovation Solution
A control system that uses a spatial locating device and rotation sensor to determine the spatial locating speed and rotational rate of the wheel, updating the calibration when necessary to ensure accurate speed control, allowing the vehicle to operate at the correct maximum speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the speed control system uses a fixed rolling circumference calibration, then the system structure remains simple, but the speed measurement accuracy deteriorates when wheel or tire changes occur
Solution Approach 1:
The control system automatically detects wheel rotation data, compares it with spatial location data, and self-calibrates the rolling circumference without requiring manual intervention or external equipment. The system serves itself by using its own sensors and processor to detect calibration errors and update the calibration parameters automatically.
Solution Approach 2:
The system continuously monitors the relationship between wheel rotation speed and actual vehicle speed (determined by spatial location), detects discrepancies, and feeds this information back to automatically adjust the rolling circumference calibration. This closed-loop feedback ensures accurate speed measurement while maintaining system simplicity.
2Productivity
If manual calibration updates are required, then the calibration process remains simple, but the operational efficiency deteriorates due to frequent manual intervention
Solution Approach 1:
The control system automatically performs calibration updates by detecting wheel rotation data, comparing it with spatial location data, and self-calibrating the rolling circumference without requiring manual intervention or external equipment. This eliminates the need for operators to stop work and perform manual calibration procedures.
Solution Approach 2:
The system proactively monitors calibration accuracy in real-time and automatically updates the calibration parameters before significant speed measurement errors occur, ensuring continuous operational efficiency without requiring reactive manual intervention.
3Measurement precision
If the rolling circumference is not accurately calibrated, then the system operation remains simple, but the speed control accuracy deteriorates leading to incorrect top speed limitations
Solution Approach 1:
The system continuously monitors the relationship between wheel rotation speed and actual vehicle speed (determined by spatial location), detects discrepancies, and feeds this information back to automatically adjust the rolling circumference calibration. This closed-loop feedback ensures accurate speed measurement and reliable speed control.
Solution Approach 2:
The system replaces manual mechanical calibration procedures with automated electronic sensing and processing. The processor analyzes sensor data from wheel rotation sensors and spatial location devices to automatically calculate and update calibration parameters, eliminating the need for manual measurement and adjustment.
Data Source
AI summary
A controller is configured to receive a first signal indicative of a spatial locating speed or a spatial locating position for determining the spatial locating speed. The controller is configured to determine a sensed speed of the work vehicle based on a calibration and a second signal indicative of a rotational rate of a wheel of the work vehicle, and to determine whether a difference between the sensed speed and the spatial locating speed exceeds a calibration threshold. In response to determining that the difference exceeds the calibration threshold, the controller is configured to update the calibration such that the sensed speed is substantially equal to the spatial locating speed, and update the sensed speed based on the updated calibration and the second signal. Further, the controller is configured to instruct a speed control system to limit a ground speed of the work vehicle based on the sensed speed.