Safety Sensor Teach-In for Adaptive Protective Field Selection
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Solution Overview
Problem
Existing sensor arrangements face challenges in precisely adapting the protective field to complex environments and changing application-specific conditions, leading to inaccurate specifications and potential false detections.
Innovation Solution
A sensor arrangement with a memory unit storing multiple protective fields, each with a warning field or reference contour, allows for automatic selection of an optimally adapted protective field during a teach-in operation, ensuring accurate detection and minimizing false alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple protective fields are stored and automatically selected during teach-in operation, then the adaptability to complex environments and changing application conditions is improved, but the device complexity increases due to additional memory unit and computer unit
Solution Approach 1:
Multiple protective fields are pre-calculated and stored in a memory unit before actual operation. During teach-in mode, the system automatically selects the appropriate protective field based on detected objects, eliminating the need for complex real-time calculations and reducing operational complexity while maintaining high adaptability.
Solution Approach 2:
Instead of creating complex real-time protective field calculations, the system creates simplified copies (pre-calculated protective fields) that can be quickly selected and applied during operation. This approach maintains adaptability while significantly reducing the computational complexity during actual safety monitoring.
2Reliability
If the protective field is precisely adapted to exclude stationary objects like walls and pillars, then false detections are reduced, but the difficulty of detecting and measuring increases due to complex environmental specifications
Solution Approach 1:
The system performs automatic teach-in operations where the safety sensor itself detects objects and automatically determines the appropriate protective field configuration. This self-service approach eliminates the need for manual specification of protective fields, reducing the difficulty of detection and measurement while improving reliability through consistent automatic adaptation.
Solution Approach 2:
During teach-in operation, the system uses feedback from object detection to automatically select and adjust the protective field configuration. The detected objects provide feedback that guides the automatic selection process, ensuring the protective field is precisely adapted to exclude stationary objects while maintaining monitoring coverage, thereby improving detection accuracy without increasing specification difficulty.
3Ease of manufacture
If a calculated specification of the protective field is used, then the initial setup is simplified, but the accuracy decreases when application-specific conditions change
Solution Approach 1:
The system transitions from static pre-calculated protective fields to dynamic automatic selection during teach-in operation. Multiple protective fields are pre-calculated for different scenarios, and the system dynamically selects the appropriate one based on real-time object detection, maintaining both ease of initial setup and high measurement precision when conditions change.
Data Source
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AI summary
The invention relates to a sensor arrangement (1) with at least one safety sensor (2) which is designed for protective field monitoring. A memory unit stores a plurality of protective fields (4), each of which is preceded by a warning field (4a) or to which a reference contour (5) is assigned. In a teach-in operation, the stored protective fields (4) in the safety sensor (2) are activated one after the other by means of a computer unit until an object (9) is detected in the assigned warning field (4a) of an activated protective field (4) or an object (9) matching its reference contour (5) is detected. This protective field (4) is adopted in the safety sensor (2) for an operating mode following the teach-in operation.