Excavator Display System Dynamic Range Scaling
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Solution Overview
Problem
Existing display systems for excavators struggle to accurately depict the positional relationship between the excavator and the target surface, often making it difficult to ascertain this relationship due to excessive scaling issues when the target surface and excavator are far apart.
Innovation Solution
A display system comprising a storage unit, position detector, and calculation unit that sets a predetermined display range and reference point based on the excavator's position relative to the target surface's boundaries, ensuring the excavator is displayed without excessive scaling, allowing for easy visualization of its position and movement relative to the target surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display scale is changed according to the distance between the target surface and the work machine, then the display adapts to varying distances, but the target surface and work machine are displayed at an excessively small size making it difficult to ascertain their positional relationship
Solution Approach 1:
The patent applies dynamics by making the display range movable rather than fixed. The display range moves together with the work machine, ensuring that the work machine remains within the display area while allowing the display to adapt to varying distances from the target surface. This dynamic adjustment prevents the work machine and target surface from being displayed at excessively small sizes while maintaining adaptability to different operating conditions.
2Area of stationary object
If the scale of the image is fixed to include all of the excavator and target surface in the same image, then the complete scene is visible, but when positioned far apart the target surface and excavator are displayed at an excessively small size
Solution Approach 1:
The patent makes the display range dynamic by coupling its movement to the work machine's position. Instead of using a fixed scale that must accommodate the entire scene from a static viewpoint, the display range moves with the work machine, automatically adjusting the visible area to maintain appropriate sizing of the work machine and target surface regardless of their relative distances.
Data Source
AI summary
In a display system in an excavator, a position of an upper boundary line and a position of a lower boundary line are calculated. The upper boundary line indicates a height of a top of a cross section of a display object surface. The lower boundary line indicates a height of a bottom of the cross section of the display object surface. A predetermined reference point of a display range is set based on a positional relationship in an up-and-down direction between the current position of the excavator and the upper boundary line or between the current position of the excavator and the lower boundary line. A guidance picture showing a cross section of the display object surface included in the predetermined display range as seen from a side of the excavator, and the current position of the excavator, is displayed.