3D Map Generation With Work Machine Data Removal
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Solution Overview
Problem
The existing image display systems for work machines, such as those described in Patent Document 1, face errors in determining matching due to asynchronous detection of the work tool's position or posture and distance, leading to potential distortion and decreased work efficiency.
Innovation Solution
A map generation system that includes a measurement data acquisition unit to collect data from a scanning distance measurement sensor, an operation information acquisition unit to gather operation data, and a measurement data correction unit to remove the work machine's portion from the measurement data based on the operation information, thereby reducing errors in determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If asynchronous detection of work tool position/posture and distance is performed, then device complexity is reduced, but measurement precision deteriorates due to detection timing deviation
Solution Approach 1:
The patent applies preliminary action by performing interpolation to estimate the work tool's position and posture at the timing of distance detection. Instead of requiring synchronous detection, the system pre-calculates what the work tool position should be at the measurement moment based on detected position changes over time. This allows asynchronous detection while maintaining measurement precision by compensating for timing deviations through mathematical estimation.
2Quantity of substance
If scanning distance measurement sensor is used to measure multiple points sequentially, then measurement data completeness is improved, but measurement precision deteriorates when work equipment position changes during scanning period
Solution Approach 1:
The patent applies dynamics by treating the work tool position and posture as dynamic variables that change over time during the scanning period. Instead of assuming static positions, the system calculates position changes between detection moments and uses interpolation to estimate positions at intermediate measurement points. This dynamic approach maintains measurement precision even when the work equipment moves during sequential scanning.
3Manufacturing precision
If work machine portion is removed from measurement data, then image quality is improved, but reliability deteriorates due to errors in determining occupied area
Solution Approach 1:
The patent applies feedback by continuously monitoring the relationship between work tool position, posture, and detected distance measurements. The system uses the calculated occupied area information to verify whether distance measurements are valid or blocked by the work machine itself. This feedback mechanism allows the system to reliably determine which portions of measurement data should be removed, improving image quality while maintaining determination reliability through continuous validation.
Data Source
AI summary
An aspect of the invention is a map generation system including a three-dimensional data acquisition unit configured to acquire three-dimensional data from a scanning distance measurement sensor measuring a distance to a target to be measured, an operation information acquisition unit configured to acquire operation information representing an operation of a work machine occurring in a cycle of update of the three-dimensional data by the scanning distance measurement sensor, and a three-dimensional data correction unit configured to remove a portion corresponding to the work machine in the three-dimensional data based on the operation information.