Excavation Control Calculator Extracting Characteristic Points
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Solution Overview
Problem
Existing area limiting excavation control systems in construction machinery face inefficiencies due to the large amount of information required for precise control, particularly when dealing with complex three-dimensional excavation surfaces, leading to delays in communication and potential failure to keep up with the actual operation of the work device.
Innovation Solution
A basic information calculator is introduced to extract and transmit simplified two-dimensional information, including characteristic points on a reference line, to an area limiting excavation controller, reducing the data transfer burden and enabling more efficient area limiting excavation control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional topographical information and operational data are transmitted from external controller to work device controller, then area limiting excavation control precision is improved, but communication time increases
Solution Approach 1:
The patent extracts only the essential characteristic points from the complete three-dimensional topographical information and operational data. The external controller identifies key characteristic points on the target excavation surface and transmits only these critical coordinates to the work device controller, rather than transmitting the entire dataset. This extraction approach maintains control precision while significantly reducing communication time and data volume.
Solution Approach 2:
The patent segments the continuous three-dimensional excavation surface into discrete characteristic points. By dividing the complex topographical data into individual key points that define the excavation boundary and surface geometry, the system enables selective transmission of only necessary spatial information, reducing overall data quantity while preserving essential control functionality.
2Ease of repair
If external controller and work device controller are provided as separate devices, then controller availability and maintainability are improved, but information transmission complexity increases
Solution Approach 1:
The patent extracts and transmits only the minimal necessary information (characteristic point coordinates) between separate controllers, rather than requiring comprehensive data exchange. This approach enables independent controller development and maintenance while keeping inter-controller communication simple and efficient.
Data Source
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AI summary
The invention provides a basic information calculator 30 for calculating basic information for area limiting excavation control to control a work device 20 of a construction machinery so that the construction machinery does not perform excavation beyond a target excavation surface. The basic information calculator 30 comprises: a storage device 33 having stored therein the three-dimensional information of the target excavation surface; a two-dimensional information extractor 34 for obtaining the intersecting line between a reference surface that is the target excavation surface or a surface calculated from the target excavation surface and the operational plane of the work device 20 on the basis of the three-dimensional information of the target excavation surface and the current positional information of the construction machinery to extract a reference line L that is the intersecting line or a line calculated from the intersecting line as the two-dimensional information of the reference surface in the operational plane; and a characteristic point transmitter 35 for transmitting the Z-coordinates of characteristic points P1, P2, ..., Pn on the reference line L to an area limiting excavation controller 40 as the basic information. With the above structure, area limiting excavation control becomes highly efficient.