Index-Value Determination for Work Machine Operator Evaluation
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Solution Overview
Problem
Current technologies lack the capability to effectively determine and evaluate the skill of an operator and analyze work machine operations from various viewpoints, requiring a comprehensive index-value representation of the work machine's state.
Innovation Solution
An index-value determination device that acquires state data, determines work classifications, and calculates index values based on this data to represent the work machine's state, including a state data acquisition unit, work determination unit, and index-value determination unit, which generates evaluation materials for operator evaluation and work analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple driving variables are collected to estimate work content, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the work estimation process into distinct phases: data acquisition from multiple sensors, data processing to extract work-related parameters, and work content calculation. This segmentation allows each component to focus on specific tasks, improving measurement precision while managing system complexity through modular architecture.
Solution Approach 2:
The patent creates a multi-functional evaluation system that can assess multiple types of work content (excavation, loading, hauling, etc.) using a unified framework. The same data acquisition and processing infrastructure serves multiple measurement purposes, reducing device complexity while maintaining high measurement precision across different work types.
2Loss of information
If comprehensive state data is acquired from multiple sources, then information completeness is improved, but loss of time increases
Solution Approach 1:
The patent implements preliminary action by pre-defining work classification categories and preparation of data processing algorithms before actual work measurement. State data from multiple sensors is collected and pre-processed in real-time, with work content calculations ready to be performed immediately when work events occur, thus maintaining information completeness while minimizing time loss.
3Measurement precision
If work classification is determined for each time point, then measurement precision is improved, but productivity decreases
Solution Approach 1:
The patent applies periodic action by determining work classification at discrete time intervals rather than continuously at every single time point. The system identifies work events and determines classifications at key moments (start and end of work operations), maintaining measurement precision for work classification while significantly improving productivity by avoiding excessive computational overhead from continuous analysis.
Data Source
AI summary
A state data acquisition unit acquires state data indicating a state of a work machine at a plurality of times. A work determination unit determines a classification of a work of the work machine for each of the plurality of times based on the acquired state data. A period determination unit determines a start point and an end point of a period related to a predetermined classification among determined classifications of works. An index-value determination unit obtains an index value of the state of the work machine from the start point to the end point.