Robot Conveyor Task Positioning for Multi-Workpiece Transfer
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Solution Overview
Problem
In robot task systems with servo-driven conveyor systems, when multiple workpieces are transferred in one pitch, the robot is unable to execute tasks on each workpiece accurately, as the position correspondence between workpieces and driving signals is one-to-one, limiting its ability to handle multiple workpieces within a specific distance.
Innovation Solution
A robot task system comprising a transfer device driven by a specific distance at a time, with a driving management unit managing the driving distance and start timing, a task position generation unit generating task positions for the robot, and a control unit coordinating the transfer device and robot to execute tasks on multiple workpieces within that distance, ensuring accurate task execution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a servo-driven conveyor transfers workpieces pitch by pitch with one-to-one position correspondence, then the robot can accurately follow the transfer device, but the robot is unable to execute tasks on multiple workpieces placed within one pitch
Solution Approach 1:
The patent segments the pitch distance into multiple transfer distances, allowing the transfer device to move incrementally (e.g., first distance, then second distance) rather than transferring all workpieces in one pitch at once. This enables the robot to execute tasks on each workpiece individually as they are transferred step-by-step, resolving the contradiction between position accuracy and multi-workpiece handling capability
Solution Approach 2:
The system dynamically adjusts the transfer device's driving distance and start timing based on the robot's task execution status. The control unit manages multiple transfer distances and coordinates them with the robot's task positions, allowing flexible adaptation to different workpiece configurations and task requirements, thereby enabling multi-workpiece handling while maintaining position accuracy
2Productivity
If the transfer device transfers multiple workpieces in one pitch, then the productivity increases, but the robot cannot execute tasks on each workpiece due to one-to-one position correspondence limitation
Solution Approach 1:
By segmenting the pitch into multiple transfer distances, the system allows multiple workpieces to be transferred within one pitch while the robot can still execute tasks on each workpiece individually. The workpieces are transferred in stages (first transfer distance, then second transfer distance), enabling the robot to perform tasks at different task positions corresponding to different transfer stages, thus maintaining both productivity and task execution reliability
Solution Approach 2:
The system performs preliminary positioning and task position generation before the transfer device moves the workpieces. The control unit generates task positions in advance based on the planned transfer distances and coordinates the robot's task execution timing accordingly, ensuring that tasks are executed reliably on each workpiece even when multiple workpieces are transferred in one pitch
Data Source
AI summary
A robot task system includes: a robot; a transfer device configured to be driven to transfer a plurality of workpieces thereon by a specific distance at a time, the plurality of workpieces being placed within the specific distance; a driving management unit configured to manage a driving distance and a driving start timing of the transfer device for driving the transfer device each time; a task position generation unit configured to generate a plurality of task positions at the driving start timing managed by the driving management unit, the plurality of task positions being positions for the robot to execute a predetermined task on the plurality of workpieces; a task unit configured to update, according to the driving of the transfer device, the plurality of task positions generated by the task position generation unit and generate a task command to cause the robot to execute the predetermined task on the plurality of workpieces while following the plurality of workpieces; and a control unit configured to control the transfer device based on the driving distance and the driving start timing of the transfer device, and control the robot based on the task command generated by the task unit.