Wheel Loader 3D Image Modeling for Work Implement Posture Detection
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Solution Overview
Problem
Wheel loaders without sensors face challenges in accurately classifying work types due to disturbances during operation, making it difficult to detect the posture of work implements through image processing.
Innovation Solution
A system equipped with a computer that estimates the posture of a work implement relative to the body of the wheel loader, creates a three-dimensional model, and generates image data for accurate work type classification by processing captured images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If image processing is used to detect work implement posture without sensors, then device complexity is reduced, but measurement precision deteriorates due to disturbances during operation
Solution Approach 1:
The patent creates a three-dimensional model that copies the actual work machine structure, including the body and work implement. This virtual model allows posture estimation through image processing without requiring physical sensors on the actual machine, thereby reducing device complexity while maintaining measurement precision through accurate virtual representation
Solution Approach 2:
The patent replaces the mechanical sensor-based detection system with an optical image processing system. By capturing images and processing them to estimate work implement posture, the system substitutes mechanical sensors with optical fields and computational algorithms, reducing device complexity while achieving accurate measurement
2Measurement precision
If a three-dimensional model is created from captured images, then measurement precision of work implement posture is improved, but device complexity increases due to computer processing requirements
Solution Approach 1:
The patent transitions from two-dimensional captured images to a three-dimensional model of the work machine. By reconstructing the three-dimensional structure from multiple image perspectives, the system achieves accurate posture estimation while the computer processing is concentrated in the model creation phase rather than continuous operation
Solution Approach 2:
The three-dimensional model is created in advance as a preliminary step before posture estimation. This pre-processing approach allows the complex computational work to be done once during model generation, after which posture estimation can be performed more efficiently by comparing current images against the established three-dimensional model
Data Source
AI summary
An image clearly displaying a work machine is easily obtained. A posture data generation unit estimates a posture of a work implement with respect to the body of the work machine in a captured image displaying the work machine. A motion state image generation unit creates a three-dimensional model representing a stereoscopic shape of the work machine based on the posture of the work implement. A specific viewpoint image generation unit creates image data including a two-dimensional image of the three-dimensional model, as viewed at a viewpoint position indicating a position of a viewpoint at which the three-dimensional model is virtually viewed.