Excavator Display System Trajectory Filtering
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Solution Overview
Problem
Existing display systems for excavating machines fail to intelligibly provide information about the construction work result to operators when excavating according to a design surface, as they often display unnecessary information and do not effectively convey the vicinity of the target surface.
Innovation Solution
A display system for excavating machines that includes a vehicle condition detection unit, memory unit, and processing unit to calculate and display the trajectory of the bucket's blade edge when it enters a predetermined range around the target surface, erasing previous trajectories, and providing auditory and visual feedback based on positional relationships and distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the display system shows the trajectory of the blade edge from a shallow position to the target dredge depth, then the operator can see the excavation progress, but the display includes unnecessary information other than information about the vicinity of the target surface, making it difficult to intelligibly provide construction work result information
Solution Approach 1:
The patent extracts and displays only the relevant portion of the blade edge trajectory that is within a predetermined range of the target surface, removing unnecessary trajectory information from shallow positions and other areas. This selective extraction of information resolves the contradiction by maintaining display clarity while still providing sufficient construction work result information to the operator.
Solution Approach 2:
The patent applies local quality by differentiating the display treatment of trajectory segments based on their spatial relationship to the target surface. Trajectory segments within the predetermined range of the target surface are displayed with emphasis, while other segments are either omitted or displayed with reduced prominence, allowing the operator to focus on the most critical construction work results.
2Reliability
If the display system continuously displays the blade edge trajectory, then the operator receives continuous feedback, but the system fails to effectively convey the vicinity of the target surface when part of a design surface is set as the target surface
Solution Approach 1:
The patent segments the blade edge trajectory into multiple portions based on their spatial relationship to the target surface. By dividing the continuous trajectory into segments within and outside the predetermined range, the system can selectively display only those segments that provide meaningful feedback about construction work results near the target surface, thereby improving feedback accuracy without losing critical information.
Solution Approach 2:
The predetermined range acts as an intermediary zone between the blade edge trajectory and the target surface. This intermediary concept allows the system to filter and prioritize trajectory information, displaying only those portions that are sufficiently close to the target surface to provide reliable construction work result feedback, thus resolving the information loss problem.
3Loss of information
If the display system shows all trajectory information, then complete excavation history is recorded, but the operator cannot easily distinguish construction work results near the target surface from other excavation activities
Solution Approach 1:
The patent extracts and prominently displays only the trajectory segments that represent construction work results near the target surface, removing or minimizing the display of other trajectory information. This extraction approach allows the operator to easily interpret construction work results without being distracted by irrelevant excavation history, thereby improving ease of operation while preserving critical information.
Solution Approach 2:
The patent applies local quality by giving special visual treatment to trajectory segments within the predetermined range of the target surface. These segments are displayed with enhanced visibility or distinct characteristics, allowing the operator to quickly distinguish construction work results from other excavation activities, thus improving information interpretation ease while maintaining complete information availability.
Data Source
AI summary
An display system of an excavating machine includes: a vehicle condition detector detecting information related to a current position and a posture of the excavating machine having a work equipment including a bucket; a memory unit storing position information of a target surface indicating a target shape of an object to be worked; a display unit displaying the bucket and position information of a design surface and the target surface; and a processing unit calculating a position of a blade edge of the bucket based on the information related to the current position and the posture of the excavating machine, and, when at least part of the bucket enters a predetermined range in a periphery of the target surface in a direction orthogonal to the target surface, displaying a trajectory of the blade edge which is calculated based on the position of the blade edge and which exists in the predetermined range.