Construction Grapple Alignment Using 3D Point Cloud Center of Gravity
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Solution Overview
Problem
The efficiency of construction operations, particularly in grabbing and lifting objects, is operator-dependent due to traditional reliance on manual center of gravity recognition, leading to variability in work accuracy and efficiency.
Innovation Solution
An automatic grab assistance system for construction machines, equipped with a sensor unit, point cloud sensing device, and electronic control device, automatically aligns the grapple with the center of gravity of an object by calculating and controlling the machine's components to ensure precise gripping and lifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual center of gravity recognition is used by the operator, then the system is simple and easy to operate, but the work accuracy and efficiency vary depending on the operator's skill
Solution Approach 1:
The patent replaces the manual mechanical sensing method with an optical sensing system. The point cloud sensing device captures three-dimensional data of the object, and the electronic control device automatically calculates the center of gravity position, substituting the operator's manual recognition process with automated optical-mechanical systems to achieve consistent high-precision alignment.
Solution Approach 2:
The system enables self-service by allowing the construction machine to automatically determine and align with the center of gravity without operator intervention. The sensor unit and control device work autonomously to calculate the center of gravity position and generate control signals for positioning, making the system self-sufficient in the alignment task.
2Productivity
If manual center of gravity recognition is used, then the device complexity is low, but the productivity varies depending on operator skill
Solution Approach 1:
The patent replaces the manual mechanical sensing method with an optical sensing system. The point cloud sensing device captures three-dimensional data of the object, and the electronic control device automatically calculates the center of gravity position, substituting the operator's manual recognition process with automated optical-mechanical systems to achieve consistent high-precision alignment.
Solution Approach 2:
The system enables self-service by allowing the construction machine to automatically determine and align with the center of gravity without operator intervention. The sensor unit and control device work autonomously to calculate the center of gravity position and generate control signals for positioning, making the system self-sufficient in the alignment task.
3Measurement precision
If automated center of gravity calculation is implemented, then the alignment accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent replaces the manual mechanical sensing method with an optical sensing system. The point cloud sensing device captures three-dimensional data of the object, and the electronic control device automatically calculates the center of gravity position, substituting the operator's manual recognition process with automated optical-mechanical systems to achieve consistent high-precision alignment.
Solution Approach 2:
The system enables self-service by allowing the construction machine to automatically determine and align with the center of gravity without operator intervention. The sensor unit and control device work autonomously to calculate the center of gravity position and generate control signals for positioning, making the system self-sufficient in the alignment task.
4Productivity
If automated alignment control is used, then the work efficiency is improved, but the ease of operation decreases
Solution Approach 1:
The system enables self-service by allowing the construction machine to automatically determine and align with the center of gravity without operator intervention. The sensor unit and control device work autonomously to calculate the center of gravity position and generate control signals for positioning, making the system self-sufficient in the alignment task.
Solution Approach 2:
The system implements closed-loop feedback control where the sensor unit continuously monitors the grapple position relative to the calculated center of gravity, and the electronic control device adjusts the working device in real-time to maintain accurate alignment, ensuring consistent operational efficiency.
Data Source
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AI summary
An aspect of the present disclosure is an automatic grab assistance system for construction machine comprising a working device having a lower driving body, an upper swivel body rotatably coupled to the lower driving body about a first rotation axis, and a boom rotatably coupled to the upper swivel body about a second rotation axis, an arm rotatably coupled to a front end of the boom about a third rotation axis, and a grapple as an attachment rotatably coupled to a front end of the arm about a fourth rotation axis, and there is provided an automatic grab assistance system for construction machine comprising a sensor unit for detecting posture information of the construction machine, a point cloud sensing device for photographing a three-dimensional point cloud of an object to be grabbed, and an electronic control device for calculating a center of gravity area of the object based on point cloud data obtained from the point cloud sensing device and controlling driving of the upper swivel body and the working device so that the grapple is aligned with the center of gravity area of the object.