Zone-Based Robotic Kitting Control for Safe Shared Workspaces
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Solution Overview
Problem
Robotic line kitting systems face challenges in ensuring safe operation around human workers, as existing safety mechanisms often result in productivity losses due to sudden halts and inefficient handling of items, particularly when detecting human presence in the workspace.
Innovation Solution
Implementing a robotic line kitting system with a safety circuit that includes sensors and a controlled safety stop process, allowing for a two-step deceleration and resumption of operations, along with dynamic zone management and task scheduling to avoid human-robot collisions and ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety mechanisms are used to detect human presence and halt robotic operations, then human safety is improved, but robot productivity and throughput deteriorate due to sudden halts
Solution Approach 1:
The workspace is divided into multiple operating zones with different safety requirements. Robots can operate autonomously in zones where no humans are present, while human presence in specific zones triggers appropriate safety responses. This segmentation allows simultaneous human safety protection and continuous robot productivity in unaffected zones.
Solution Approach 2:
The robotic system dynamically adjusts its operation mode based on real-time human presence detection. When humans are detected in safe zones, robots continue autonomous operation. When humans enter restricted zones, the system dynamically transitions to appropriate safety modes (warning, pause, or halt), optimizing both safety and productivity based on current conditions.
2Reliability
If robotic operations are halted immediately upon detecting human presence, then human safety is improved, but loss of time and productivity worsen due to frequent stops
Solution Approach 1:
The system performs preliminary assessment of human presence and zone classification before triggering safety halts. Sensors continuously monitor and classify zones, allowing the system to prepare appropriate responses in advance. Only when humans enter restricted zones does the system trigger warnings or halts, minimizing unnecessary stops and reducing operational downtime.
Solution Approach 2:
The system implements continuous feedback through sensors that monitor human presence and robot operation status in real-time. This feedback loop allows dynamic adjustment of safety responses, enabling the system to maintain operation during low-risk conditions and only interrupt when necessary, thereby reducing overall operational downtime while ensuring safety.
3Productivity
If robots operate at full speed in shared workspace, then productivity is improved, but risk of collision with humans worsens
Solution Approach 1:
The workspace is segmented into zones with different speed and operation requirements. In zones where no humans are present, robots operate at full speed to maximize throughput. When humans are detected in or approaching certain zones, the system automatically adjusts robot speed and operation mode for those specific zones, maintaining full productivity in safe zones while reducing collision risk in human-occupied zones.
Solution Approach 2:
Robot speed and operation mode are dynamically adjusted based on real-time human presence detection and zone classification. The system continuously monitors workspace conditions and adapts robot behavior accordingly, enabling full-speed operation in safe conditions and automatic speed reduction when humans are nearby, thereby optimizing both productivity and safety.
Data Source
AI summary
A robotic line kitting system is disclosed. Data indicating for each of a plurality of operating zones comprising a workspace with which the robotic line kitting system is associated a corresponding safety state information is stored. The data is used to dynamically schedule and perform tasks associated with a higher level objective, including by operating the one or more robotic instrumentalities in one or more operating zones, if any, indicated by the data to currently be available to perform tasks using the one or more robotic instrumentalities and by not operating the one or more robotic instrumentalities in one or more operating zones, if any, indicated by the data to not currently be available to perform tasks using the one or more robotic instrumentalities.