Parts Supply Stage With Oblique Imaging for Orientation Picking
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Solution Overview
Problem
Existing parts transfer systems, such as those described in Patent Literature 1, struggle with accurately aligning parts with varying orientations, particularly for bottomed cylindrical shapes, leading to incorrect picking by transfer robots.
Innovation Solution
A parts supply device equipped with an imaging system that images parts from an obliquely upward direction and a parts detection unit that detects positions and orientations based on image information, using line light to scan and calculate height distributions, combined with a moving head and grooved stage to ensure correct orientation alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If parts are arranged on a placement surface without additional detection mechanisms, then the device complexity is reduced, but the measurement precision of part orientations deteriorates
Solution Approach 1:
The patent replaces mechanical alignment methods (such as grooves or physical guides) with an optical detection system. The imaging device captures images of parts from an oblique direction, and the parts detection unit calculates orientations based on image processing, eliminating the need for complex mechanical orientation constraints while achieving precise orientation measurement.
Solution Approach 2:
The patent introduces an imaging device as an intermediary between the parts and the detection system. Instead of directly mechanically constraining part orientations, the imaging device captures visual information that indirectly reveals part orientations through image processing, enabling precise detection without direct mechanical intervention.
2Reliability
If parts are placed on a placement surface without imaging systems, then the device complexity is reduced, but the reliability of correct orientation picking deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the imaging device continuously monitors part orientations on the placement surface, and the parts detection unit provides real-time orientation information to the transfer device. This feedback loop ensures the transfer device receives accurate orientation data, improving the reliability of correct orientation picking.
Solution Approach 2:
The patent replaces mechanical orientation assurance systems with an optical feedback system. Instead of relying on physical grooves or guides to ensure correct orientation, the system uses imaging and image processing to detect and communicate part orientations, thereby improving reliability while reducing mechanical complexity.
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
Enables reliable and accurate picking of parts in the correct orientation, enhancing the efficiency and precision of transfer operations.
Implementation Method 1
an imaging system configured to image the plurality of parts from an obliquely upward direction with respect to the placement surface of the stage
Implementation Method 2
the line light emitting device configured to emit line light extending in a direction intersecting the obliquely upward direction toward the stage at a first angle that is acute with respect to the placement surface
Implementation Method 3
the line light imaging device configured to image the line light on the placement surface of the stage toward the stage at a second angle that is acute with respect to the placement surface of the stage
Data Source
AI summary
A parts supply device includes a stage having a placement surface on which a plurality of parts is placed, an imaging system configured to image the plurality of parts from an obliquely upward direction with respect to the placement surface of the stage, and a parts detection unit configured to detect positions and orientations of the plurality of parts on the placement surface of the stage based on image information obtained by the imaging system.