Work Vehicle Display System for Obstruction-Free Operator View
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Solution Overview
Problem
Existing work vehicles, such as hydraulic excavators, face challenges in displaying work assistance information in a manner that does not obstruct the operator's view, leading to reduced working efficiency due to the placement and movement of the display device relative to the work implement's bucket.
Innovation Solution
A work vehicle with a display device in the cab that calculates the position of the bucket's teeth and adjusts the display area to ensure work assistance information is shown above or outside the bucket's movement path, preventing obstruction and optimizing the operator's field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If work assistance information is displayed on the display device to provide necessary information to the operator, then information availability is improved, but the field of view may be obstructed reducing working efficiency
Solution Approach 1:
The display device dynamically adjusts its display area based on the real-time position of the bucket. The controller calculates the bucket position using sensor data and modifies the display region to avoid obstructing the operator's view of the work site, thereby maintaining both information visibility and working efficiency
Solution Approach 2:
The display information is positioned in the vertical dimension above the bucket teeth rather than horizontally blocking the view. By displaying work assistance information in the upper portion of the display device when the bucket is in lower positions, the system utilizes the vertical space that would otherwise be empty, providing information without obstructing the operator's forward view
2Loss of information
If the display area is fixed to show work assistance information, then information presentation is improved, but eye movement increases reducing working efficiency
Solution Approach 1:
The display area dynamically tracks the bucket position and adjusts accordingly. When the bucket moves, the display region moves with it, keeping the work assistance information within a consistent visual zone relative to the bucket, thereby reducing the operator's eye movement and maintaining information availability
3Loss of information
If the display device shows the work implement clearly, then visual observation is improved, but work assistance information may obstruct the view
Solution Approach 1:
The display device is segmented into multiple display regions: one region shows the work implement (bucket) clearly, while another region displays work assistance information. The controller dynamically adjusts the boundaries between these regions based on bucket position, ensuring that information display does not compromise work implement visibility
Solution Approach 2:
Work assistance information is displayed in the vertical dimension above the bucket rather than overlapping with the bucket image. This spatial separation in the vertical dimension allows both the work implement and information to be visible simultaneously without mutual obstruction
Data Source
AI summary
A work vehicle includes: a work implement having a bucket; a main body to which the work implement is attached, and having a cab; a display device provided in the cab and configured to overlay and thus display work assistance information on an actual view of a work site; a bucket teeth position calculator configured to calculate a position of teeth of the bucket of the work implement in an available display area of the display device; and a following process unit configured to display the work assistance information to follow movement of the bucket of the work implement in the available display area of the display device only at a position above the position of the teeth of the bucket of the work implement as calculated by the bucket teeth position calculator.