Excavation Control System Bucket Position Data Segmentation
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Solution Overview
Problem
Conventional excavation control systems for hydraulic excavators face high processing loads and unnecessary data discard due to calculating designed surface data regardless of the bucket's position, leading to inefficient excavation operations.
Innovation Solution
An excavation control system that includes a vehicle main body, working unit, designed landform data storage, bucket position data generation, designed surface data generation, and excavation limit control, which adjusts the bucket's position based on superior and subordinate designed surface data to optimize excavation operations and reduce processing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the computer calculates designed surface data regardless of bucket position, then complete designed surface data is generated, but processing load increases and unnecessary data must be discarded
Solution Approach 1:
The designed surface data is segmented into multiple pieces based on the excavation region. The computer only calculates and generates designed surface data for regions where the bucket can actually reach and excavate, rather than calculating complete data for all possible regions. This segmentation reduces the processing load while ensuring that all necessary data for actual excavation operations is available.
Solution Approach 2:
Instead of calculating complete designed surface data for the entire excavation area (excessive action), the system calculates only the partial data needed for the current bucket position and reachable regions. This partial action approach avoids generating unnecessary data that would require discarding, thereby reducing processing load while maintaining data completeness for actual operations.
2Reliability
If designed surface data is calculated without considering bucket position, then all possible excavation areas are covered, but time is wasted calculating data that will not be used
Solution Approach 1:
The system performs preliminary determination of the excavation region based on the current bucket position before calculating designed surface data. By pre-identifying which regions are actually excavatable from the current position, the system avoids wasting time calculating data for regions that cannot be reached, while still ensuring complete coverage of all relevant excavation areas.
Solution Approach 2:
The calculated designed surface data has local quality tailored to the specific excavation region and bucket position. Rather than uniformly calculating data for all areas, the system adapts the calculation scope and detail to match the local excavation needs, reducing unnecessary computation time while maintaining adequate coverage for actual excavation operations.
Data Source
AI summary
An excavation control system includes a working unit having a bucket, a designed landform data storage part storing designed landform data, a bucket position data generation part that generates bucket position data, a designed surface data generation part, and an excavation limit control part. The designed surface data generation part generates superior and subordinate designed surface data based on the designed landform and bucket position data. The superior designed surface data indicates a superior designed surface corresponding to a position of the bucket. The subordinate designed surface data indicates a first subordinate designed surface linked to the superior designed surface. The designed surface data generation part generates shape data indicating shapes of the superior designed surface and the first subordinate designed surface. The excavation limit control part automatically adjusts a position of the bucket.