Construction History Mapping for Accurate Slope Terrain Data
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Solution Overview
Problem
Existing systems for generating terrain data using work machines, such as hydraulic excavators, struggle to accurately reproduce geographical features like slopes due to uniform mesh spacing, leading to inaccuracies in terrain data representation.
Innovation Solution
A construction history calculation system that utilizes a controller to detect the posture of a work machine, sets configuration surfaces with predetermined point density, and calculates the trajectory of the working device to generate highly accurate terrain data by associating monitor points with recording points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If equal interval meshes are used for terrain data generation, then the data processing becomes simple and systematic, but geographical features such as slopes and characteristic parts cannot be accurately reproduced
Solution Approach 1:
The patent applies local quality by adjusting the density of measurement points based on the local terrain characteristics. In areas with gentle slopes, points are spaced further apart, while in areas with steep slopes or characteristic geographical features, points are densely concentrated. This allows the system to maintain processing simplicity while achieving high accuracy where it matters most.
Solution Approach 2:
The patent implements dynamics by making the measurement point interval variable rather than fixed. The system dynamically adjusts the point density based on the slope angle and terrain complexity, transitioning from uniform spacing to adaptive spacing that responds to local conditions, thereby resolving the contradiction between systematic processing and accurate reproduction.
2Manufacturing precision
If measurement points are densely distributed to capture terrain features, then terrain data accuracy improves, but the data processing complexity and computational load increase
Solution Approach 1:
The patent applies local quality by concentrating measurement points only in areas where terrain features require high detail, such as slope transitions and characteristic parts. In flat or uniform areas, fewer points are used. This selective distribution maintains high accuracy where needed while minimizing overall data volume and processing complexity.
Solution Approach 2:
The patent applies partial action by using high point density only partially, specifically in critical areas with complex terrain features, rather than uniformly across the entire measurement area. This approach achieves sufficient accuracy for the most important regions without the excessive computational burden of dense sampling everywhere.
3Manufacturing precision
If the mesh size is reduced to improve terrain representation, then geographical features are reproduced more accurately, but the number of meshes increases leading to longer processing time
Solution Approach 1:
The patent applies local quality by using smaller mesh sizes only in areas with complex terrain features where high accuracy is critical, while using larger mesh sizes in flat or uniform areas. This selective mesh refinement maintains accurate terrain representation in critical regions while minimizing the total number of meshes and associated processing time.
Data Source
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AI summary
The construction history calculation system includes a controller that calculates construction history data based on the detection results of a posture detection device that detects the posture of a work machine. The controller acquires target surface data and, based on the acquired target surface data, sets multiple configuration surfaces, including the target configuration surface and adjacent configuration surfaces that constitute the target surface data, as surface areas. It sets multiple record points to achieve a predetermined point density for the surface areas, calculates the trajectory of the work machine's working device based on the detection results of the posture detection device, and calculates the position information of the working device's trajectory, associating the position information of the monitor points of the working device that constitute the trajectory with each of the multiple record points, as construction history data.