GNSS Blade Slope Control During Work Vehicle Pitching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Work vehicles with ground-engaging implements experience pitching due to encountering high and low ground spots, causing the implement to move off the designated grade, leading to uneven surfaces or inhibited smooth plane creation.
Innovation Solution
A work vehicle system incorporating a global positioning system (GNSS) and a controller that adjusts the ground-engaging blade's position based on inclination and roll errors to maintain desired slopes and depth, using a linkage assembly and hydraulic cylinders to correct pitching-induced deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the work vehicle moves over high and low ground spots, then the vehicle can traverse varied terrain, but the ground-engaging implement moves off the desired grade due to pitching
Solution Approach 1:
The system uses GNSS receivers to continuously monitor the actual position and orientation of the work vehicle and ground-engaging implement, comparing these measurements against desired grade parameters. The controller processes this feedback information and automatically adjusts the implement position via hydraulic actuators to maintain the desired grade despite vehicle pitching on varied terrain
Solution Approach 2:
The patent replaces traditional mechanical grade control systems (which rely on manual operator adjustment based on visual observation) with an automated electronic control system that uses GNSS satellite positioning, electronic sensors to measure vehicle orientation, and computer-controlled hydraulic actuators to maintain precise grade control
2Manufacturing precision
If the operator manually corrects the implement position, then the grade accuracy can be maintained, but the productivity decreases due to continuous manual intervention
Solution Approach 1:
The system enables self-service operation by automatically detecting the work vehicle's position and orientation through GNSS receivers, calculating the required implement adjustments, and actuating the hydraulic cylinders to maintain desired grade without requiring continuous manual intervention from the operator
Solution Approach 2:
The controller continuously receives feedback from GNSS receivers about the implement's actual position and orientation, automatically compares this against the desired grade parameters, and makes real-time adjustments through hydraulic actuators, eliminating the need for continuous manual correction while maintaining high grade accuracy
3Length of moving object
If the implement is positioned far from the vehicle, then the working reach is increased, but the pitching effect is amplified causing greater deviation from desired grade
Solution Approach 1:
The system uses GNSS receivers mounted on both the work vehicle and ground-engaging implement to independently measure their respective positions and orientations. The controller calculates the relative positioning and pitching effects, then automatically compensates by adjusting the implement position to maintain accurate grade control even when the implement is positioned far from the vehicle
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
The system effectively maintains the desired grade and smooth surface by continuously correcting the blade's position relative to the vehicle's pitching, ensuring consistent ground shaping.
Implementation Method 1
A global positioning system is configured for generating a work vehicle location signal indicative of a location of the work vehicle, a work vehicle inclination signal indicative of an inclination of the work vehicle, and a work vehicle roll signal indicative of a roll of the work vehicle
Data Source
AI summary
A work vehicle including a chassis, a ground-engaging implement, an input device, a global positioning system, an implement sensor, and a controller. The implement movably connected to the chassis via a linkage assembly configured to allow the implement to be raised, lowered, and moved in a roll direction. The input device providing a bench surface, a desired cross slope, a desired mainfall slope, and a desired depth. The global positioning system configured to provide a chassis heading signal, a chassis inclination signal indicative of a main fall angle, and a chassis roll signal indicative of a cross slope angle. The sensor configured to provide a blade inclination signal and a blade roll signal. The controller configured to receive the signals, determine a distance error, and send a command to move the implement toward the desired mainfall slope and cross slope based on the distance error and towards the desired depth.