Virtual Space Orthogonal Projection for Load Positioning
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Solution Overview
Problem
Existing positioning methods using laser light sources or projectors to display markers on load base objects often result in distorted projections and inaccurate positioning due to oblique projections, inclination of loads, and uneven surfaces.
Innovation Solution
A positioning method and system that utilize a virtual space to maintain relative position relationships between virtual objects and devices, allowing for orthogonal projection of guide images onto loads, ensuring accurate positioning regardless of projector placement or optical axis orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a projector is used to project a marker video onto a load base object, then a positioning guide can be provided, but the marker becomes distorted and shifted when the projector is not vertically above the load base object or when the load is inclined
Solution Approach 1:
The patent creates a virtual copy of the load base object and load in a virtual space, allowing the guide image to be generated and adjusted in the virtual environment before being projected. This virtual modeling enables the system to compensate for oblique projection angles and load inclination by calculating the appropriate projection parameters in advance, thus maintaining positioning accuracy without requiring the projector to be vertically above the load base object.
Solution Approach 2:
The system dynamically adjusts projection parameters such as projection angle, distance, and image distortion correction based on the detected position and orientation of the load. By changing these parameters according to the actual loading conditions, the system maintains accurate positioning guidance even when the projector position or load orientation varies from the ideal vertical alignment.
2Adaptability or versatility
If the load is introduced in an inclined state or has uneven surfaces, then flexibility in loading is improved, but the marker projection becomes distorted and inaccurate positioning cannot be achieved
Solution Approach 1:
The system dynamically adapts to different load conditions by continuously detecting the load's position and orientation, then adjusting the projection parameters in real-time. This dynamic adjustment allows the system to maintain accurate positioning guidance whether the load is introduced horizontally or inclined, and regardless of surface unevenness, thus achieving both loading flexibility and positioning precision.
Solution Approach 2:
The system uses detection devices to obtain feedback information about the load's actual position and orientation, then uses this information to adjust the projection parameters accordingly. This closed-loop feedback mechanism enables the system to compensate for inclined loading and surface unevenness, maintaining accurate positioning guidance under varying loading conditions.
3Ease of operation
If perspective projection is used, then the projection can be performed from various angles, but the marker is displayed at a shifted position due to the projection influence
Solution Approach 1:
By creating a virtual model of the loading scenario and using orthogonal projection in the virtual space, the system generates guide images that are free from the distortion and position shifts inherent in perspective projection. The virtual copy allows the guide lines to be projected accurately even when the physical projector is positioned at various angles, maintaining both projection flexibility and position accuracy.
Data Source
AI summary
A control device that controls a projector includes a virtual space manager, a calculator, and a projection controller. The virtual space manager places virtual objects corresponding to the projector, a load base object, and a load in a virtual space while maintaining a relative position relationship therebetween in the actual space. The calculator sets an axis parallel to a vertical axis in the virtual space as a guide axis when projecting a guide image for showing a loading position of the load by an orthogonal projection and calculates an orthogonal projection guide image corresponding to the guide image projected onto the virtual object corresponding to the load in the virtual space by orthogonal projection, based on the relative position relationship between the virtual objects. The projection controller controls the projector to project the orthogonal projection guide image onto the load.