Crane Guide Display: Laser Scanner Point Cloud for Load Shape
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Solution Overview
Problem
Conventional guide information display devices for cranes struggle to accurately present the shapes and heights of suspended loads and ground objects near the load, leading to difficulties in recognizing these features for operators.
Innovation Solution
A guide information display device equipped with a camera and laser scanner that captures images and acquires point cloud data to estimate top surfaces of suspended loads and ground objects, generating guide frames and displaying this information superimposed on the image to provide accurate shape and height information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If position information on suspended load and ground object is obtained by using local measurement data from distance measuring section, then the system can provide basic position guidance, but it is difficult to accurately acquire the shapes of suspended load and ground object and the height of ground surface, leading to inaccurate guide information
Solution Approach 1:
The patent transitions from 2D distance measurement data to 3D point cloud data by introducing a laser scanner that captures spatial coordinates (x, y, z) of multiple points on the suspended load and ground objects. This dimensional expansion enables accurate reconstruction of object shapes and heights, directly resolving the limitation of incomplete shape information.
Solution Approach 2:
The patent creates a digital copy of the physical scene by generating a point cloud model that replicates the three-dimensional shapes and positions of the suspended load and ground objects. This digital replica allows the system to accurately represent and process object geometries without physically measuring each dimension separately.
2Device complexity
If guide information is generated from incomplete measurement data, then the system can operate with simpler equipment, but operators cannot accurately recognize the shapes of suspended load and ground object
Solution Approach 1:
The patent combines a camera and laser scanner into an integrated data acquisition system. The camera captures visual appearance while the laser scanner simultaneously measures three-dimensional spatial coordinates. Merging these two measurement modalities provides both shape recognition and precise dimensional data without requiring separate complex systems.
Solution Approach 2:
The laser scanner serves multiple functions: it measures distances to ground objects, reconstructs three-dimensional shapes of suspended loads, determines ground surface heights, and provides spatial positioning information. This multi-functionality replaces what would otherwise require multiple specialized measurement devices.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables precise presentation of guide information on the shapes and heights of suspended loads and ground objects, enhancing operator recognition and safety during crane operations.
Implementation Method 1
a laser scanner configured to acquire point cloud data from above the suspended load in the area
Data Source
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AI summary
The present invention accurately presents guide information which expresses the shape and height of a hoisting load and an object located near the hoisting load. A guide information display device 50 is equipped with: a data acquisition unit 60 provided with a camera 61 for capturing an image of a hoisting load region WA which includes at least a hoisting load W and the ground surface F below the hoisting load W from above the hoisting load W, and a laser scanner 62 for obtaining a data point group P in the hoisting load region WA; a data processing unit 70 for estimating the top surface of the hoisting weight W, the ground surface F, and the top surfaces of objects C, on the basis of the data point group P acquired by the laser scanner 62, and generating guide frames GD1 which surround the top surfaces of the hoisting weight W and objects C; and a data display unit 80 which displays guide information GD obtained by overlapping the guide frames GD1 generated by the data processing unit 70 and the image M captured by the camera 61 with one another.