Excavator Work Mode Switching for Precise Remote Control
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Solution Overview
Problem
Unmanned remote-controlled excavators face challenges in achieving precise control due to inaccurate remote viewing, video latency, and instability in electronically controlled hydraulic systems, leading to reduced construction accuracy and potential safety hazards.
Innovation Solution
A precise control method for excavators that allows for one-key switching of work modes via an electric control handle, customizing action speeds and coefficients through a vehicle terminal, and processing handle signals to drive electromagnetic valves for precise actions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If remote control operation is used for excavator, then operator safety is improved, but operation accuracy deteriorates due to video delay and viewing inaccuracies
Solution Approach 1:
The system dynamically switches between multiple work modes (gross operation mode, precise operation mode, super precise operation mode) based on operational needs. The control parameters such as action speed and coefficients are adjusted in real-time to match the current mode, enabling the system to adapt between safety-oriented remote control and precision-oriented local control
Solution Approach 2:
Different work modes correspond to different action speeds and action coefficients. By changing these parameters according to the selected mode, the system can achieve both safe remote operation and precise micro-operations. For example, precise operation mode uses lower action speeds and adjusted coefficients to improve accuracy
2Extent of automation
If electronic control hydraulic system is used, then automation is improved, but control stability deteriorates affecting construction accuracy
Solution Approach 1:
The system provides dynamic switching between manual and automatic control modes. Operators can transition from fully automatic electronic control to manual control when precision is required, thereby maintaining system automation benefits while mitigating stability issues during critical operations
Solution Approach 2:
The system implements feedback mechanisms where operation signals are processed through multiple stages including signal amplification and coefficient adjustment. The feedback loop allows real-time correction of control signals to compensate for hydraulic system instabilities
3Manufacturing precision
If multiple work modes are implemented with different action speeds, then operation precision is improved, but system complexity increases
Solution Approach 1:
A single control handle serves multiple functions by integrating mode selection and signal control capabilities. The same handle can switch between different work modes and also function as the control input device, reducing the need for separate control devices for each mode
Solution Approach 2:
The control system is segmented into distinct functional modules: mode switching module, signal acquisition module, signal processing module, and execution module. This segmentation allows each module to handle specific tasks independently, making the complex system more manageable and maintainable
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
Enhances operational accuracy and safety by enabling quick mode switching and precise control of micro-operations, reducing operational errors and improving efficiency in various operating conditions.
Implementation Method 1
outputting a current by pressure and action judgement to drive an electromagnetic valve, to achieve precise action of the excavator
Data Source
AI summary
The present disclosure relates to an excavator, a precise control method and system therefor, a vehicle terminal and a storage medium. The precise control method for the excavator comprises: presetting a plurality of work modes of the excavator, and an action rate and action coefficient corresponding to each working mode of the plurality of work modes; and performing work mode switching according to a handle input signal.