Robot Marker Unit for Accurate 3D Workpiece Positioning
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Solution Overview
Problem
Existing systems, such as those described in Patent Literature 1 and 2, face inaccuracies in workpiece position detection due to reliance on pictorial images and lack of detailed marker attachment methods for vehicles.
Innovation Solution
An operation system comprising a marker unit with a base section and multiple markers, a sensor to detect three-dimensional positions, and a control device that calculates and utilizes this data for precise operation, enabling accurate three-dimensional position consideration and collective marker handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple markers are arranged individually on the measurement object, then the three-dimensional position can be detected, but the labor for arranging markers increases significantly
Solution Approach 1:
The patent combines multiple markers (first marker, second marker, third marker) into a single integrated marker unit. This marker unit includes a base section with multiple marker sections arranged in specific spatial relationships. By merging individually arranged markers into one pre-configured unit, the system maintains accurate three-dimensional position detection while significantly reducing the labor required for marker arrangement, as the entire unit can be attached as a single component rather than positioning multiple separate markers individually
2Measurement precision
If markers are arranged individually on the measurement object, then position detection is possible, but the time required for setup increases
Solution Approach 1:
The marker unit is designed and configured in advance with multiple marker sections positioned at predetermined locations on a base section. The spatial arrangement and relative positions of all markers are established during manufacturing rather than during setup. This preliminary configuration allows the entire marker unit to be attached to the measurement object as a single pre-assembled component, dramatically reducing the time required for setup while maintaining the detection accuracy that would otherwise require careful individual placement of multiple markers
3Ease of operation
If a single marker is used on the measurement object, then the arrangement process is simple, but the three-dimensional position detection accuracy is insufficient
Solution Approach 1:
The marker unit is segmented into multiple marker sections (first marker, second marker, third marker), each positioned at different locations on the base section. These segmented markers provide multiple detection points that enable accurate three-dimensional position calculation through spatial relationships. The segmentation is implemented in a way that maintains ease of operation, as all segmented markers are integrated into one unit that can be attached as a single component, thus achieving both simple arrangement process and high detection accuracy
Data Source
AI summary
A robot system including a robot, a marker unit, a sensor, storage device, and a control device. The robot performs an operation with regard to a workpiece. The marker unit is attached to a measurement object and includes a base section and a plurality of markers attached to the base section. The sensor detects identification information and three-dimensional positions of the plurality of markers. The storage device stores teaching data including operation data and attachment position data indicating a correspondence relationship between the identification information of each of the markers and an attachment position of the corresponding marker. The control device calculates a three-dimensional position of the measurement object based on the three-dimensional positions of the plurality of markers and the attachment position data and controls the robot based on the three-dimensional position of the measurement object and the operation data so as to make the robot perform the operation.