Work Machine Controller Dynamic Area Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing work machine systems do not effectively prevent interference between multiple work machines operating in the same work site, as they primarily focus on avoiding environmental obstacles rather than managing interactions between multiple machines.
Innovation Solution
A work machine system equipped with location and posture information acquisition devices, along with a controller that limits the operation of actuators based on a permitted work area, allowing the work area to be changed only if it is determined possible, thereby preventing interference between multiple machines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a work machine operates with automatic speed reduction to avoid environmental obstacles, then safety against static obstacles is improved, but interference between multiple moving work machines cannot be prevented
Solution Approach 1:
The patent applies dynamics by making the work area movable and adjustable rather than fixed. The controller dynamically modifies the no-entry zone boundaries based on real-time positions of multiple work machines, allowing the work area to adapt to changing operational conditions and prevent interference between moving machines while maintaining safety
Solution Approach 2:
The patent implements feedback mechanisms where position detection devices continuously monitor the locations of multiple work machines, and the controller uses this feedback information to dynamically adjust work area boundaries and operate limiting signals, creating a closed-loop control system that responds to real-time conditions
2Reliability
If a fixed work area is set to prevent interference, then safety is improved, but operational flexibility and productivity are reduced
Solution Approach 1:
The controller dynamically adjusts the work area boundaries based on real-time positions of other work machines. When no interference risk exists, the work area expands to allow full productivity. When another machine approaches, the boundary dynamically contracts to prevent interference, thus maintaining both safety and productivity
Solution Approach 2:
The patent changes the parameter of work area boundaries from fixed to variable. The controller modifies boundary positions based on detected positions of other machines, allowing the work area to expand when safe and contract when needed, optimizing both safety and operational efficiency
3Reliability
If operation limiting is applied to prevent interference, then safety between machines is improved, but operational freedom and ease of operation are reduced
Solution Approach 1:
The controller applies operate limiting signals selectively and locally - only to specific actuators of a work machine when another machine is detected in the no-entry zone. Other actuators and operations outside the restricted area continue without limitation, maintaining operator freedom while ensuring safety where needed
Data Source
AI summary
In a case that a change instruction to instruct to change a work area A1 to a requested work area A2 is input, whether or not change of the work area A1 to the requested work area A2 is possible is judged on the basis of the work area A1, location information of a machine main body configured by an upper swing structure 10 and a lower track structure 9, and posture information of a work device 15, and the work area A1 is overwritten with the requested work area A2 to change the work area in an only case that it is judged that change is possible. This can suppress interference between plural work machines.