Safety Zone Detection for Automated Production Environments
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Solution Overview
Problem
Production environments are becoming increasingly hazardous due to automation, with existing safety systems like lockout/tagout procedures and light curtain systems failing to distinguish between authorized and unauthorized personnel, leading to inefficient shutdowns and potential hazards.
Innovation Solution
The implementation of safety systems that include sensing devices capable of detecting human presence and movement within defined safety zones, using technologies such as thermal imagery and tags to differentiate between humans and non-humans, and automatically altering production environment aspects like machine tool movement or alarm activation based on unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light curtain systems are used to detect human presence in safety zones, then safety is improved by automatically shutting down machines, but the system cannot distinguish between authorized and unauthorized personnel leading to unnecessary shutdowns and reduced productivity
Solution Approach 1:
The safety zone is segmented into multiple detection zones with different safety levels. The system distinguishes between authorized and unauthorized personnel by detecting specific characteristics (such as thermal signatures or tags), allowing selective shutdown of only the affected work station rather than the entire assembly line, thus maintaining productivity while ensuring safety.
Solution Approach 2:
The patent introduces intermediary detection mechanisms (thermal imaging devices, tag readers) that act as mediators between the light curtain system and the machine control. These intermediaries provide additional information to distinguish authorized from unauthorized personnel, enabling intelligent decision-making about shutdowns rather than blanket responses.
2Reliability
If lockout/tagout procedures are used to control production environments, then safety is improved by preventing unauthorized access, but the process becomes manual and time-consuming reducing operational efficiency
Solution Approach 1:
The system implements self-service safety control where authorized personnel are automatically recognized through tags or biometric identification, and the system autonomously manages safety zone access and machine shutdowns without requiring manual lockout/tagout procedures. This automated recognition and control eliminates manual administrative tasks while maintaining safety.
Solution Approach 2:
The patent replaces manual mechanical lockout/tagout procedures with automated electronic detection and control systems. Sensors, thermal imaging devices, and controllers automatically monitor safety zones, identify authorized personnel, and execute shutdown commands, substituting human-operated mechanical procedures with automated electronic systems that are faster and more efficient.
3Productivity
If automated machine tools and robots are deployed to increase productivity, then production efficiency is improved, but the production environment becomes increasingly hazardous to personnel
Solution Approach 1:
The system enables continuous automated production by implementing intelligent safety monitoring that distinguishes between authorized personnel performing maintenance and unauthorized personnel. Authorized workers can safely interact with machines without triggering unnecessary shutdowns, maintaining continuous productive operation while unauthorized access is detected and responded to appropriately.
Solution Approach 2:
The patent implements feedback loops where sensors continuously monitor the safety zones around automated machines, detect human presence, and provide real-time information to controllers. The system adjusts machine operation based on this feedback - shutting down only when unauthorized personnel are detected or when authorized personnel indicate need for shutdown - thereby maintaining productivity while managing hazards dynamically.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
These systems effectively deter hazards by selectively altering production environment conditions in response to unauthorized human presence, enhancing safety without unnecessary shutdowns and improving operational efficiency.
Implementation Method 1
a sensing device may be configured to detect thermal imagery of humans, and the safety system may be configured to distinguish between human thermal signatures and non-human thermal signatures
Data Source
AI summary
Safety systems and methods for production environments are disclosed. Safety systems include at least one sensing device configured to detect presence of an unauthorized human and/or an authorized human at least partially within a defined safety zone, and a controller configured to automatically alter at least one aspect of the production environment responsive to the presence of the unauthorized human and/or the authorized human. Safety methods include detecting presence of an unauthorized human and/or an authorized human at least partially within a defined safety zone, and automatically altering at least one aspect of the production environment responsive to the detecting.