Crane Guide Display Device for Accurate Load Positioning
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Solution Overview
Problem
Conventional guide information display devices for crane operations inaccurately present the shapes and positions of suspended loads and ground objects due to the presence of wire ropes in the measuring range, leading to mixed position information and difficulty in recognizing shapes based on attitude and operating conditions.
Innovation Solution
A guide information display device equipped with a camera, laser scanner, data processing section, and data display section, which captures and processes point cloud data to exclude data between the suspended load and the boom's distal end, estimate top surfaces, and generate guide frame images to accurately display the positions and shapes of suspended loads and ground objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a distance measuring section measures the distance to the wire rope in addition to the suspended load, then the measurement coverage is improved, but the position information accuracy deteriorates due to mixed display of wire rope and ground object positions
Solution Approach 1:
The patent segments the measurement space into multiple regions: a first region for the suspended load, a second region for ground objects, and excludes the wire rope region from measurement. The distance measuring section measures distances only in the first and second regions, not where the wire rope is located, thereby preventing mixed position information while maintaining comprehensive coverage of relevant areas.
2Quantity of substance
If the guide information display device displays position information based on distance measurement results including wire rope, then the information completeness is improved, but the shape recognition accuracy deteriorates
Solution Approach 1:
The patent extracts and removes the wire rope from the measurement and display system by defining an excluded region where the wire rope is located. The distance measuring section does not measure distances in this excluded region, and the guide information display device does not display position information for objects in the excluded region, thereby ensuring that only clean, accurate position information from the first and second regions is displayed.
3Difficulty of detecting and measuring
If the distance measuring section measures all objects in its range including wire rope and ground objects, then the detection capability is improved, but the guide information clarity deteriorates due to mixed position display
Solution Approach 1:
The patent applies local quality by assigning different measurement and display characteristics to different spatial regions. The first region (suspended load area) and second region (ground object area) are measured and displayed with full detail, while the excluded region (wire rope area) is deliberately not measured or displayed. This localized differentiation ensures that guide information remains clear and unambiguous by preventing mixed position displays.
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 accurately presents the shapes and positions of suspended loads and ground objects regardless of crane attitude and operating conditions, enhancing operational safety and efficiency by providing clear and accurate guide information.
Implementation Method 1
a laser scanner that acquires point cloud data on the work area captured by the camera
Data Source
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AI summary
The present invention accurately presents information about the shape and location of a hoisting load and an object located near the hoisting load, regardless of the orientation and operational state of the crane. A guide information display device 50, wherein a camera 61 images part of a work region SA of a crane 1, a laser scanner 62 obtains a data point group P of the work region SA captured by the camera 61, and a data processing unit 70: removes, from the data point group P acquired by the laser scanner 62, a data point group P located between a hoisting load W hanging from a crane 1 and the tip end section of the telescopic boom 22 of the crane 1; estimates, on the basis of the remaining data point group P, the top surface of the hoisting load W, the ground surface F of the work region SA, and the top surfaces of objects C located in the work region SA; generates guide frames GD1 which surround the top surfaces of the hoisting load W and the objects C; and overlaps the guide frames GD1 generated by the data processing unit 70 on the image M captured by the camera 61, and displays the same on a data display unit 80.