Work Vehicle Control System for Layer Thickness Consistency
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Solution Overview
Problem
During filling work with work vehicles, it is challenging to maintain the desired thickness of soil layers due to varying compression rates of different soil densities, leading to inefficiencies and poor finishing quality.
Innovation Solution
A control system for work vehicles that determines the compression rate by obtaining topographical data before and after filling work, and adjusts the blade tip position accordingly to ensure accurate layer formation, using a controller to calculate and correct the target design surface based on the compression rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If soil is piled up in layers of predetermined thickness, then the work vehicle can perform filling work, but the thicknesses of compacted soil layers differ according to soil nature (soft soil compresses more than hard soil)
Solution Approach 1:
The control system measures the actual thickness of compacted soil layers using sensors (such as ultrasonic sensors or GPS) and feeds this information back to the controller. The controller then adjusts the blade tip position and lifting cylinder operations to compensate for compression variations, ensuring consistent final layer thickness regardless of soil density
Solution Approach 2:
The system dynamically changes operational parameters (blade angle, lifting force, compaction speed) based on detected soil compression characteristics. By adjusting these parameters in real-time, the system adapts to different soil densities while maintaining consistent layer thickness after compaction
2Manufacturing precision
If the blade tip position is manually adjusted for each soil type, then layer thickness can be controlled, but work efficiency decreases and finishing quality is poor
Solution Approach 1:
The work vehicle's control system automatically performs the functions of measuring, calculating, and adjusting blade position without operator intervention. The system self-regulates by detecting actual layer thickness and autonomously modifying operational parameters, eliminating manual adjustment needs while maintaining precision
Solution Approach 2:
The patent replaces manual mechanical adjustment of the blade with an automated control system that uses sensors, processors, and actuators. This substitution of mechanical manual operation with an intelligent control system simultaneously improves precision and productivity
3Reliability
If the work vehicle compacts soft low-density soil, then the soil can be densified, but the compacted layer becomes thinner compared to hard high-density soil
Solution Approach 1:
The control system performs preliminary measurements of soil properties and predicted compression rates before compaction occurs. Based on these predictions, it pre-adjusts the blade tip position and lifting operations to compensate for expected compression, ensuring the final compacted layer reaches the target thickness
Solution Approach 2:
The system dynamically adjusts operational parameters during the compaction process based on real-time feedback about soil compression behavior. This dynamic adaptation allows the system to maintain consistent compacted layer thickness across varying soil densities by continuously optimizing blade position and lifting force
Data Source
AI summary
A work vehicle includes a work implement. A control system for the work vehicle includes a controller. The controller obtains first topographical data indicative of a topography of a work target before filling work. The controller obtains blade tip position data indicative of a blade tip position of the work implement during the filling work. The controller obtains second topographical data indicative of a compacted topography after the filling work. The controller determines a compression rate of the work target from the first topographical data, the blade tip position data, and the second topographical data.