Construction Equipment GPS Receiver Positioning for Drilling Accuracy
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Solution Overview
Problem
Drilling equipment with tall masts experiences GPS antenna displacement due to mast height and bearing play, leading to inaccuracies in position determination, especially in densely built-up areas and when creating multiple bored piles, resulting in increased material consumption and overlapping errors.
Innovation Solution
A construction device with a beam-shaped leader element that allows the GPS receiver unit to be moved between upper and lower positions, with multiple units arranged on opposite sides for improved signal quality and accuracy, and an auxiliary winch beam for lifting tasks, reducing inaccuracies caused by mast deflections and bearing play.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the GPS antenna is mounted at the top of the mast, then the GPS signal quality is improved, but the position determination accuracy deteriorates due to mast deflection and bearing play
Solution Approach 1:
The GPS receiver unit is mounted on a traversing mechanism that allows it to move between an upper position (for signal quality) and a lower position (for measurement accuracy). This dynamic positioning resolves the contradiction by enabling the system to occupy both positions sequentially rather than being fixed at one location.
Solution Approach 2:
The solution adds the time dimension to the spatial positioning problem. By moving the GPS receiver vertically between two positions and performing measurements at both locations, the system transforms a static spatial contradiction into a dynamic temporal-spatial solution, where data from both upper and lower positions are combined.
2Measurement precision
If the GPS receiver unit is positioned close to the ground, then the position determination accuracy is improved, but the GPS signal quality deteriorates in densely built-up areas
Solution Approach 1:
The traversing mechanism enables the GPS receiver to dynamically switch between upper and lower positions. When signal quality is poor, the receiver moves upward; when accuracy is prioritized, it moves downward. This dynamic adaptation resolves the contradiction by allowing the system to optimize for either parameter depending on operational requirements.
Solution Approach 2:
The system performs periodic measurements at both upper and lower positions, combining data from multiple measurement cycles. This periodic sampling at different heights allows the system to maintain both signal quality and accuracy over time through data fusion from multiple positions.
3Measurement precision
If multiple GPS receiver units are arranged on opposite sides of the traversing element, then the position determination accuracy is improved through compensation of measurement inaccuracies, but the device complexity increases
Solution Approach 1:
The system divides the measurement function into multiple independent GPS receiver units positioned at different locations. Each receiver provides independent measurements, and the results are combined through data fusion algorithms to achieve higher overall accuracy while maintaining modular simplicity.
Solution Approach 2:
Multiple GPS receiver measurements are merged and combined through computational algorithms to produce a single, more accurate position determination. This merging of data sources compensates for individual measurement errors and achieves superposition of accuracy without requiring a completely new measurement system.
4Measurement precision
If the GPS receiver unit is moved between upper and lower positions, then the position determination accuracy is improved, but the device complexity increases due to the traversing mechanism
Solution Approach 1:
The traversing mechanism serves multiple functions: it positions the GPS receiver for optimal signal reception, enables measurements at different heights, and provides a platform for mounting additional sensors. This multi-functionality justifies the added complexity by making a single mechanism serve several measurement and positioning purposes.
Solution Approach 2:
The traversing mechanism is integrated into the existing mast structure and utilizes the mast's own motion capabilities. The system leverages the natural vertical movement capacity of the drilling rig's mast rather than requiring an entirely separate positioning system, thereby reducing overall system complexity.
Data Source
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AI summary
The invention relates to a construction device and a method for operating this construction device with a carrier device, an approximately vertical mast mounted on the carrier device, a traversing element which is vertically movable along a linear guide on the mast, and at least one GPS receiver unit which is arranged in the area of the mast. According to the invention, the at least one GPS receiver unit is attached to the traversing element and is movable with the traversing element between an upper first measuring position and a lower second measuring position.