Mirror-Assisted Proximity Detection for Obscured Assembly Cells
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Solution Overview
Problem
In assembly environments, the separation of human technicians and automated machines due to safety concerns leads to reduced efficiency and slower assembly rates, especially when large parts obscure the technician's presence, making it difficult to determine proximity and coordinate safe operation.
Innovation Solution
A proximity reporting system with multiple sensors and mirrors that dynamically detect the proximity of technicians to machines, adjusting detection modes based on the presence of obscuring objects, and providing warnings or shutting down machines when safety thresholds are breached, ensuring safe operation and increased uptime.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If technicians are restricted from entering zones of operation of automated machines, then safety of technicians is improved, but assembly efficiency and productivity deteriorate
Solution Approach 1:
The patent introduces an intermediary detection system (sensors, processors, and communication devices) that mediates between technicians and automated machines. This system enables real-time proximity detection and warning, allowing technicians to work near machines without direct physical contact, thus maintaining safety while improving assembly efficiency.
Solution Approach 2:
The system implements continuous feedback through real-time monitoring of technician proximity to machine zones. When a technician enters a restricted zone, the system provides immediate warnings and can automatically halt machine operations, creating a closed-loop safety mechanism that enables closer collaboration between human workers and automated systems.
2Reliability
If technicians are restricted to separate times of use from automated machines in the same zone, then safety is improved, but assembly rate and efficiency worsen
Solution Approach 1:
The patent transforms static zone restrictions into dynamic, real-time proximity management. Instead of fixed time-based separation, the system dynamically adjusts safety protocols based on actual technician proximity to machine zones, enabling concurrent operations when safe and preventing conflicts when risks are detected.
Solution Approach 2:
The detection system acts as an intermediary that enables safe concurrent operations by continuously monitoring and managing interactions between technicians and automated machines in the same physical zone, eliminating the need for time-based separation.
3Device complexity
If traditional sensors are used to detect technician proximity, then detection capability is limited, but device complexity remains low; however, when obscuring objects are present, detection precision deteriorates
Solution Approach 1:
The patent segments the detection task across multiple sensor types (e.g., optical sensors, ultrasonic sensors, RFID tags) distributed throughout the workspace. Each sensor handles specific detection aspects, and their combined data provides comprehensive proximity monitoring that remains accurate even when parts obscure line-of-sight paths.
Solution Approach 2:
The system employs multi-functional detection devices that can operate through various conditions including obscured views. Sensors are designed to detect technicians using multiple modalities (optical, acoustic, electromagnetic) ensuring detection capability is maintained regardless of physical obstructions in the workspace.
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
The system ensures the safety of technicians while allowing them to work near machines, prevents obscuring objects from rendering technicians undetectable, and enhances assembly efficiency by maintaining machine operation without dedicated technician avoidance sensors.
Implementation Method 1
operating sensors at the cell to indirectly detect a location of a first proximity detector and a location of a second proximity detector via mirrors when an obscuring object is present
Data Source
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AI summary
Systems (100) and methods (200) are provided for proximity detection in a fabrication environment. One embodiment is a method (200) for reporting proximity in an assembly environment (130). The method (200) includes equipping (202) a technician (150, 920) with a first proximity detector (160, 300, 410, 1260), disposing (204) a second proximity detector (162, 300, 420, 430, 1290) at a machine (140, 950, 1030, 1250) that moves within a cell (132, 133, 910, 1200) of the assembly environment (130), operating (210) sensors (120, 940, 1028, 1270) at the cell (132, 133, 910, 1200) to indirectly detect a location of the first proximity detector (160, 300, 410, 1260) and a location of the second proximity detector (162, 300, 420, 430, 1290) via mirrors (180, 942, 1299) when an obscuring object (170, 1000) is present, and providing (214) a warning to the technician (150, 920) if a distance between the first proximity detector (160, 300, 410, 1260) and the second proximity detector (162, 300, 420, 430, 1290) is less than a threshold.