Zone-Based Robot Control for Human-Presence Safety Stops
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Solution Overview
Problem
Robotic line kitting systems face challenges in ensuring the safety of human workers operating near or in the same workspace as autonomous robots, leading to reduced productivity and throughput due to the need for rapid shutdowns to prevent human-robot collisions.
Innovation Solution
Implementing a robotic line kitting system with multiple operating zones and advanced safety features, including sensors and controlled safety stops, to dynamically adjust robotic operations and avoid human presence areas, ensuring safe and efficient autonomous operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional safety mechanisms are used to detect human presence and rapidly halt robotic operations, then human worker safety is improved, but robot productivity and throughput deteriorate due to frequent shutdowns
Solution Approach 1:
The workspace is divided into multiple operating zones with different safety requirements and risk levels. Sensors detect human presence in specific zones, and robotic operations are selectively adjusted only in those zones rather than halting entire system operations. This segmentation allows safe human-robot collaboration in some areas while maintaining high productivity in other areas.
Solution Approach 2:
The robotic system dynamically adjusts its behavior based on real-time sensor data about human presence. When humans are detected in certain zones, the system transitions between different operational modes (e.g., reduced speed, paused operations, or altered motion paths) rather than simply shutting down. This dynamic response maintains safety while minimizing productivity loss.
2Object-affected harmful factors
If robotic operations are halted rapidly upon detecting human presence, then collision risk is reduced, but operational continuity and throughput deteriorate
Solution Approach 1:
The system performs preliminary safety assessments by continuously monitoring sensor data before robotic operations proceed. When potential hazards are detected, the system proactively adjusts operations in advance rather than reacting with abrupt shutdowns. This preliminary action prevents collisions while maintaining smoother operational flow.
Solution Approach 2:
The system implements continuous feedback loops where sensors monitor human presence and robot operations in real-time, and the control system continuously adjusts robotic behavior based on this feedback. This closed-loop control enables dynamic safety management that responds to actual conditions rather than relying on predetermined shutdown triggers.
3Extent of automation
If autonomous robotic operations are implemented in shared workspaces, then automation efficiency is improved, but safety management complexity increases due to human-robot interaction requirements
Solution Approach 1:
The system introduces sensors and zone-based control mechanisms as intermediaries between autonomous robotic operations and human workers. These intermediaries translate complex safety management requirements into simple zone-based rules, allowing autonomous robots to operate efficiently while safety is managed through the intermediary layer that handles human-robot coordination.
Data Source
AI summary
Data indicating a corresponding safety state information indicating an extent to which that operating zone currently is or is not available to the robotic system to perform tasks using one or more robotic instrumentalities associated with a robotic system is used, for each of a plurality of operating zones, to dynamically schedule and perform tasks associated with a higher level objective. The corresponding safety state information associated with the first operating zone indicating one of a plurality of safety states associated with a presence of a human worker in the first operating zone is received from one or more sensors associated with a first operating zone of the plurality of operating zones. Autonomous behavior of the one or more robotic instrumentalities is altered based on the one of the plurality of safety states associated with the presence of the human worker in the first operating zone indicated by the corresponding safety state information.