Excavator Operation Guide Device for Operator Skill Standardization
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Solution Overview
Problem
The operational skill level of operators is not considered in the measurement of operational conditions of hydraulic excavators, leading to inconsistent performance when operators change, as existing systems do not account for variations in operator expertise.
Innovation Solution
An operation guide device is implemented, featuring potentiometers, proportional solenoid valves, and a main controller that compares operator inputs with standard operation patterns, providing real-time guidance through a display to ensure consistent operation procedures, thereby reducing the impact of skill level variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If standard operation procedures are not enforced, then operator flexibility is maintained, but measurement precision of operational conditions deteriorates due to skill level variations
Solution Approach 1:
The system stores standard operation procedure data and standard stroke data in advance in the storage section. During operation, the guide controller automatically retrieves and compares these pre-stored standards with actual operator inputs, eliminating the need for manual standard setting and reducing real-time computational complexity while ensuring consistent measurement criteria.
Solution Approach 2:
The guide controller continuously monitors operator inputs via potentiometers, compares them against stored standard operation patterns, and provides real-time feedback through the display section when deviations are detected. This closed-loop feedback system guides operators to follow standard procedures, improving measurement precision without requiring complex external supervision.
2Measurement precision
If real-time operation monitoring is implemented, then operational condition measurement accuracy is improved, but information processing load increases
Solution Approach 1:
The system extracts only the essential operation signals from potentiometers that are directly relevant to measurement accuracy, comparing these specific signals against corresponding standard stroke data. This selective extraction approach focuses processing resources on critical measurement parameters rather than analyzing all possible operational data, reducing overall information processing load while maintaining measurement accuracy.
3Stability of the object's composition
If standard operation patterns are enforced through automated guidance, then consistency of operational measurements is improved, but ease of operation deteriorates due to additional guidance requirements
Solution Approach 1:
The operation guide device is self-contained, automatically acquiring operation signals from potentiometers, comparing them with stored standards, and providing guidance through the display without requiring external intervention. The system serves itself by autonomously managing the entire measurement and guidance process, ensuring consistency while minimizing the operational burden on operators.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution effectively reduces the variation in operational conditions measurement by providing real-time guidance and feedback, ensuring consistent performance across different operators, thereby improving the accuracy and reliability of hydraulic excavator operations.
Implementation Method 1
a plurality of potentiometers that is provided on respective operating devices comprised of electric levers and configured to operate respective operating members
Implementation Method 2
a plurality of proportional solenoid valves that drives a plurality of actuators which actuate the respective operating members and upperstructure in correspondence to the operation signals from the potentiometers
Data Source
AI summary
A guide controller that displays an operation guide image for a hydraulic excavator acquires operation signals outputted from operating devices formed of electric operating levers and stores them in a collected data storage section, compares strokes of the operating devices as derived from the operation signals, which are stored in the collected data storage section, with standard strokes corresponding to standard operation procedures out of standard operation pattern data stored in a standard operation pattern storage section, and, if a deviation equal to or greater than a predetermined standard stroke threshold is determined to exist between at least one of the strokes and the corresponding standard stroke, to read the operation guide image from the standard operation pattern storage section and to display it on a display.