Wheel Loader Load Centering Control for Spill Prevention
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Solution Overview
Problem
When loading materials into a dump truck using a wheel loader, the loading process often needs to be repeated multiple times, leading to potential spills during transport if the loading state is inappropriate.
Innovation Solution
A work machine system that includes a main body, a work implement, a work implement actuator, and a controller. The controller acquires information about the loading status of the load in the load container, determines if the load needs to be moved, and operates the work machine to push the load towards the center of the load container.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If loading work is performed multiple times to reach load capacity, then the quantity of loaded material increases, but the load may spill out during transport if the loading state is inappropriate
Solution Approach 1:
The controller acquires information about the loading status of the load in the load container and uses this feedback to determine whether load movement is necessary. This closed-loop control ensures that the loading state is continuously monitored and adjusted to maintain stability while achieving full load capacity.
Solution Approach 2:
The system performs preliminary assessment of the loading status before transport begins. By evaluating the load distribution in advance and determining whether load movement is necessary, the system prevents spillage during transport rather than reacting to it afterward.
2Reliability
If the controller monitors loading status and moves load to center position, then loading stability improves, but the complexity of the control system increases
Solution Approach 1:
The work machine performs self-assessment of its loading status using its own sensors and control systems. The controller autonomously determines whether load movement is necessary and executes the movement without external intervention, simplifying the overall system architecture while maintaining high reliability.
Data Source
Figure 1
Figure 2
Figure 3(A)~3(D)
AI summary
A work implement (3) loads a load (300) into a vessel (301). A work implement actuator drives the work implement (3) with respect to a main body. An automation controller (100) commands the work implement actuator to drive, based on a detected value of the position of the work implement (3) and a detected value of the position of the vessel (301) with respect to a wheel loader (1). The automation controller (100) acquires information about a loading status of the load (310) in the vessel (301), determines whether it is necessary to move the load (310) in the vessel (301), based on the acquired information about the loading status of the load (310), and operates, when determining that it is necessary to move the load (310) in the vessel (301), the wheel loader (1) to move the load (310) toward the center (CL) of the vessel (301).