Excavator Display System Orthogonal Bucket View
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Solution Overview
Problem
The existing display systems for excavation machines fail to accurately depict the relative position between the bucket and the target excavation landform, especially when the bucket has multiple rotation axes, leading to discomfort and inadequate assistance for the operator.
Innovation Solution
A display system that calculates a reference vector based on the vehicle state data, working equipment outer shape data, and working equipment state data to display the bucket and target line from a direction orthogonal to the reference vector, ensuring accurate representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the bucket and target excavation landform are displayed from a given direction, then the display is simple, but the relative position between the bucket and target line may not be accurately displayed when the bucket rotates
Solution Approach 1:
The display system dynamically adjusts the viewing direction based on the bucket's rotation state. The control unit calculates the reference vector from the tilt angle sensor data and automatically rotates the display perspective to maintain orthogonality to the reference vector, ensuring accurate relative position representation throughout the bucket's range of motion.
Solution Approach 2:
The system changes the display parameter (viewing direction) based on the bucket's tilt angle parameter. By calculating the reference vector from the tilt angle and adjusting the display direction accordingly, the system maintains accurate geometric representation of the bucket-target line relationship despite changes in bucket orientation.
2Device complexity
If the bucket is displayed from a fixed direction, then the display system is simple, but the operator may feel uncomfortable and the assistance to the operator is insufficient when the bucket rotates
Solution Approach 1:
The display system transitions from a static viewing direction to a dynamic one that adapts to the bucket's rotation. The control unit continuously updates the display perspective based on real-time tilt angle data, ensuring the displayed image remains intuitive and accurate throughout the bucket's motion, thereby improving operator comfort and assistance quality.
Solution Approach 2:
The system uses feedback from the tilt angle sensor to automatically adjust the display direction. The control unit receives tilt angle information, calculates the appropriate viewing direction orthogonal to the reference vector, and updates the display accordingly, creating a closed-loop system that maintains optimal display quality throughout bucket operation.
Data Source
AI summary
A display system for an excavation machine includes a calculator configured to calculate, based on vehicle state data indicating a position and a posture of a vehicle body of an excavation machine, working equipment outer shape data indicating an outer shape and a dimension of working equipment supported by the vehicle body, and working equipment state data indicating a posture of the working equipment, a reference vector extending in a widthwise direction of a bucket of the working equipment and passing through a specified portion of the bucket, and a display controller configured to cause a display device to display the bucket and a target line viewed from a direction orthogonal to the reference vector.