Workpiece Position Matching Using Partial 3D Models
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Solution Overview
Problem
Existing systems face challenges in accurately acquiring the position of large workpieces within the detection range of shape detection sensors, leading to incomplete data and reduced accuracy in positioning.
Innovation Solution
A device and method that utilize a model acquiring unit to create a workpiece model, a partial model generating unit to limit the model to a portion, and a position acquiring unit to match the partial model with shape data detected by a sensor, allowing for accurate positioning even when the workpiece exceeds the sensor's detection range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a shape detection sensor is used to detect the position of a large workpiece, then the detection range is limited, but the workpiece may not fit within this detection range, leading to incomplete position information
Solution Approach 1:
The workpiece model is divided into multiple partial models, each corresponding to a specific region or feature of the workpiece. This segmentation allows the shape detection sensor to capture and match individual partial models within its limited detection range, thereby determining the position of the entire large workpiece through composite information from multiple partial matches.
2Reliability
If the entire workpiece model is used for matching, then complete position information is required, but this increases the complexity of the matching process when the workpiece exceeds sensor detection range
Solution Approach 1:
The method extracts and utilizes only the necessary partial models corresponding to detectable features of the workpiece, rather than requiring the entire workpiece model. This extraction approach simplifies the matching process by focusing computational resources on matching relevant partial models within the sensor's detection range, while still enabling accurate position determination of the complete workpiece.
Data Source
AI summary
A device includes a model acquisition unit that acquires a workpiece model representing a modeled workpiece; a partial model generation unit that generates, using the workpiece model acquired by the model acquisition unit, a partial model representing a limited part of the workpiece model; and a position acquisition unit that matches the partial model generated by the partial model generation unit with shape data detected by a shape detection sensor to acquire the position, in a control coordinate system, of the portion of the workpiece corresponding to the partial model.