Work Machine Vibration Weighting for Cumulative Damage Tracking
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Solution Overview
Problem
Existing technologies struggle to accurately quantify the degree of damage accumulated in work machines, such as hydraulic excavators, due to the complexity of wear and vibration patterns.
Innovation Solution
A work machine equipped with an acceleration sensor, machine body, and a controller that determines operating states, weights vibration influence, and computes a cumulative load to quantify damage accurately.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the work machine only outputs total cumulative time, then the system complexity is low, but the measurement precision of damage quantification is insufficient
Solution Approach 1:
The patent segments the damage quantification process into distinct components: vibration intensity measurement, operating state classification (9 levels), cumulative time tracking for each state, and weighted summation. This segmentation allows comprehensive damage assessment while maintaining manageable system complexity through modular processing of each component.
Solution Approach 2:
The patent transitions from one-dimensional total cumulative time to multi-dimensional damage quantification by incorporating vibration intensity levels (9 levels), operating state types, and their interactions. This dimensional expansion enables precise damage measurement without proportionally increasing system complexity through structured data organization.
2Measurement precision
If the work machine classifies vibration intensity into nine levels and counts determination times, then the measurement precision improves, but the device complexity increases
Solution Approach 1:
The patent applies parameter changes by categorizing continuous vibration intensity into 9 discrete levels and associating each level with specific operating states. This parameter discretization enables accurate vibration measurement while simplifying processing complexity through standardized classification thresholds and predetermined weighting factors for each state-level combination.
3Measurement precision
If the work machine computes cumulative load with weighting for each operating state, then the measurement precision of damage quantification improves, but the calculation complexity increases
Solution Approach 1:
The patent implements preliminary action by pre-determining weighting factors for each operating state and vibration intensity level combination before actual damage calculation. This preliminary setup stores reference data and calculation parameters in advance, enabling the controller to compute cumulative load through straightforward weighted summation rather than complex real-time analysis, thus improving measurement precision while controlling calculation complexity.
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
Enables precise quantification of damage accumulation in work machines, improving maintenance and operational efficiency by assessing the impact of different operating conditions.
Implementation Method 1
an acceleration sensor that detects vibration acceleration of the work machine
Data Source
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AI summary
A work machine includes a machine body, a work device attached to the machine body, an acceleration sensor attached to the machine body or the work device, and a controller. The controller determines which operating state among a plurality of operating states the work machine is in on the basis of running information on the work machine, executes weighting according to the degree of influence of vibration concerning each of the operating states on the basis of a sensing result of the acceleration sensor, computes a cumulative load that represents a cumulative value of a load acting on the work machine concerning each of the operating states, computes a total cumulative load by summing the cumulative load of each of the operating states, and outputs the total cumulative load.