Object End Detection Using Feed Surface Height Difference
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Solution Overview
Problem
Existing methods fail to accurately identify the ends of moving objects transported with their ends in contact, necessitating a trade-off between maximizing flow and precise identification, especially in sectors like woodworking where objects are often identical and indistinguishable when touching.
Innovation Solution
A device comprising two horizontal feed surfaces with a step difference, utilizing a sensor positioned at the transition zone to detect the ends of objects as they misalign, allowing for accurate identification without requiring active movement means, thus enabling both precise end detection and high object flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If objects are transported with their ends in contact with one another to maximise flow, then productivity is improved, but measurement precision deteriorates because it becomes impossible to distinguish between two objects positioned one after the other
Solution Approach 1:
The patent introduces a vertical dimension by creating a height difference between two feed surfaces. Objects transported on the first feed surface are at a different elevation than those on the second feed surface, allowing the sensor to detect the end of an object on the first surface without interference from objects on the second surface, even when ends are in contact horizontally
2Measurement precision
If objects are spaced apart to enable accurate identification with proximity sensors, then measurement precision is improved, but productivity deteriorates due to reduced flow rate
Solution Approach 1:
Instead of requiring horizontal spacing between objects, the patent uses vertical separation through the height difference between feed surfaces. This allows objects to be in contact horizontally (maintaining high flow) while the sensor detects ends vertically, eliminating the need for spacing and thus maintaining productivity
3Measurement precision
If active movement means are used to create misalignment between objects, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent creates a passive misalignment system where objects naturally settle at different heights on the two feed surfaces without requiring active movement mechanisms. The height difference creates a gravitational equipotential situation where objects rest at different elevations, exposing their ends for detection without motors or actuators
Solution Approach 2:
The system uses the objects' own weight and the height difference between surfaces to automatically create the misalignment needed for detection. No external active movement means are required; the geometry of the feed surfaces itself provides the misalignment function
Data Source
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Figure 3~4
AI summary
A device for identifying the ends of moving objects comprises a first feed surface (2) for transporting objects (100) positioned one after another with their ends in contact with one another, and a second feed surface (3), for transporting objects (100) positioned one after another arriving from the first feed surface (2), adjacent to the first feed surface (2), there being a difference in height (4) between these surfaces. A sensor (6) is operatively associated with the difference in height (4) to detect an end of at least one object (100). A method for identifying the ends of moving objects comprises the steps of: feeding a plurality of objects (100) positioned with their ends in contact with one another along a path; creating a misalignment between two objects (100) fed along the path so as to at least partly expose the ends of the misaligned objects (100); and detecting the end of at least one of the objects (100) positioned at the misalignment zone.