Excavator Working Device Fault Detection With Solenoid Valve Shutdown
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Solution Overview
Problem
Current excavator operation systems rely heavily on operator experience for fault detection and handling, which is subjective and does not meet functional safety requirements, especially with increasing complexity due to electric control technology, leading to potential safety risks from communication faults and electronic component failures.
Innovation Solution
Implement a method and apparatus that monitor action signals of excavator working devices, enable safety control functions, and turn off solenoid valves when faults are detected, utilizing a Bayesian fault diagnosis model for probability analysis and troubleshooting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If operator experience-based fault detection is used, then operational flexibility is maintained, but safety reliability is insufficient
Solution Approach 1:
The system performs self-diagnosis by automatically monitoring action signals and comparing them with expected operation patterns, eliminating the need for manual operator judgment and providing objective fault detection
Solution Approach 2:
The system continuously monitors action signals and provides feedback on system state, enabling automatic fault detection and safety control based on real-time signal analysis
2Measurement precision
If electric control technology is applied, then control precision is improved, but safety risks increase due to communication faults and electronic failures
Solution Approach 1:
The system prepares safety control measures in advance by monitoring action signals and detecting potential faults before they lead to dangerous situations, enabling preventive safety control
Solution Approach 2:
The system introduces an intermediary safety control mechanism that mediates between the operator's intentions and the actual system operation, providing an additional layer of safety verification
3Loss of time
If automated safety control is implemented, then fault response time is reduced, but system complexity increases
Solution Approach 1:
The system performs preliminary monitoring of action signals and prepares safety control measures in advance, enabling rapid fault response without complex real-time decision-making processes
Data Source
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AI summary
The present disclosure provides a method and apparatus of controlling a working device of an excavator, and an excavator, and relates to the technical field of engineering machinery. The method comprises: monitoring an action signal of any working device of the excavator; enabling an action control function corresponding to the action signal of the working device; enabling a safety control function corresponding to the action signal of the working device; and in case that the safety control function determines that a fault occurs, turning off a solenoid valve corresponding to the action signal of the working device, thereby meeting the safety requirement.