Projector Zoom Control for Accurate Cut Piece Marking
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Solution Overview
Problem
Existing methods for projecting information onto cut pieces placed on a pallet struggle to maintain accurate positioning and zoom ratio adjustments due to variations in plate thickness and the number of stacked pieces, leading to inconsistent projection positions.
Innovation Solution
An information projecting method and apparatus that adjusts the projector's aspect ratio, positional relationship, and zoom ratio based on plate thickness and stacked number information to ensure consistent projection onto the cut piece or adjacent position, using a projector with a positional relationship operation part and magnification operation part to maintain a constant top face height position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the projector position is fixed and projection is performed onto cut pieces stacked on a pallet, then the projecting device structure is simplified, but the projection position accuracy deteriorates due to variations in plate thickness and number of stacked pieces
Solution Approach 1:
The patent implements dynamic adjustment of the projector's zoom ratio based on the actual plate thickness and number of stacked pieces. The system calculates the top face height position using the formula H = h + (n-1)×t, where h is the pallet height, n is the number of stacked pieces, and t is the plate thickness. The projector then adjusts its zoom ratio dynamically to compensate for height variations, maintaining accurate projection positioning without changing the projector's physical location.
2Measurement precision
If the projector position and zoom ratio are adjusted for each different plate thickness, then the projection position accuracy is maintained, but the operation complexity and time consumption increase
Solution Approach 1:
The system automatically calculates the top face height position H = h + (n-1)×t and determines the appropriate zoom ratio without requiring manual intervention. The projector control unit receives the plate thickness and stacked number information, performs the calculations autonomously, and adjusts the projector settings automatically. This self-service mechanism eliminates manual measurement and adjustment operations, reducing both operation complexity and time consumption while maintaining high projection accuracy.
3Area of stationary object
If the projector is positioned to project onto the top face of the work, then the projection coverage is maximized, but the projection position shifts when the top face height changes due to plate thickness variations
Solution Approach 1:
The patent changes the optical parameter (zoom ratio) of the projector to compensate for variations in the top face height position. When the plate thickness or number of stacked pieces changes, causing the top face height H to vary, the system calculates the required zoom ratio adjustment and applies it to the projector. This parameter change approach maintains a stable positional relationship between the projector and the top face, ensuring consistent projection coverage without physical repositioning.
Data Source
AI summary
An information projecting method projects information concerning a cut piece onto the cut piece, which is cut and separated from a plate-like work and is on a placement table, or onto a position adjacent to the cut piece. To adjust to an aspect ratio of a projector, the method assigns a long side of the work to an X-axis direction of the aspect ratio and a short side of the work to a Y-axis direction of the aspect ratio, finds a positional relationship d between a top face of the work and the projector according to plate thickness information of the work on the placement table and positioned corresponding to the projector arranged at a predetermined Y-axis-direction position, and with a zoom ratio based on the found positional relationship, projects the information concerning the cut piece onto the cut piece or onto a position adjacent to the cut piece.