Bucket Alignment Display for Offset Excavation Guidance
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Solution Overview
Problem
Existing display systems for turning work vehicles, particularly those capable of horizontal offset, struggle to accurately detect and display the position of construction work edges, leading to operational challenges and safety concerns during tasks like digging side ditches, as they fail to account for the relative changes in positional information due to offsetting mechanisms.
Innovation Solution
A display system for turning work vehicles that includes an arithmetic unit to calculate the necessary revolving and offset amounts for aligning the bucket with a predetermined excavation area, using position detecting devices to provide operational guidance and safety restrictions to prevent collisions, displayed on a screen for the operator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a position sensor and GPS antenna are used to detect the construction work edge position, then position detection is possible, but the detection accuracy deteriorates when the work machine is offset horizontally
Solution Approach 1:
The position detection system is segmented into multiple independent sensors: a GPS antenna for detecting the superstructure position and multiple position sensors (first and second position sensors) for detecting work machine positions at different locations. This segmentation allows each sensor to independently measure its local position, and the control unit synthesizes these measurements to calculate the construction work edge position, maintaining accuracy even when the work machine is horizontally offset.
2Measurement precision
If a GPS antenna is installed on the construction work edge, then position detection is possible, but the reliability deteriorates due to vibration and impact
Solution Approach 1:
The GPS antenna is extracted from the construction work edge location and repositioned to the superstructure, which experiences less vibration and impact. The system compensates for the work machine's horizontal offset by using the superstructure's stable GPS position combined with position sensors that detect the relative positions of the work machine components, thereby maintaining detection accuracy while improving reliability.
3Adaptability or versatility
If the work machine is offset horizontally to enhance workability in narrow spaces, then adaptability improves, but the ability to accurately detect construction work edge position deteriorates
Solution Approach 1:
The control unit continuously receives feedback from the GPS antenna and multiple position sensors to calculate the current position of the construction work edge. This real-time feedback mechanism allows the system to dynamically adjust and maintain accurate position detection even when the work machine is horizontally offset, enabling precise operational guidance for the operator.
4Device complexity
If operational guidance is provided without considering work machine offset, then system complexity remains low, but the ease of operation deteriorates due to high skill requirements
Solution Approach 1:
The control unit automatically performs the complex calculation of construction work edge position based on inputs from the GPS antenna and position sensors, without requiring manual intervention or complex operator calculations. The system provides operational guidance that automatically accounts for horizontal offset, thereby maintaining low system complexity while significantly improving ease of operation and reducing the skill level required by the operator.
Data Source
AI summary
According to the present invention, a display system of a turning work vehicle is used for the turning work vehicle in which a work machine having a bucket can be offset relative to a revolving superstructure in the horizontal direction. The display system includes: an arithmetic unit that calculates the position of the bucket on the basis of a detection result obtained by a position detecting device provided on the turning work vehicle, and calculates a necessary revolving amount of the revolving superstructure and a necessary offset amount of the work machine that are needed to align a side section of the bucket with a side edge of a predetermined excavation area; and a display device that displays the positional relationship between the bucket and the predetermined excavation area.