Safety Light Curtain for Open Carousel Slide Loading
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Solution Overview
Problem
Digital slide scanning apparatuses that hold multiple glass slides pose safety hazards for operators due to moving parts and risk of slide damage, as existing systems lack effective safety measures to prevent accidents and ensure proper slide positioning.
Innovation Solution
A digital slide scanning apparatus with a slide rack carousel that includes a safety light curtain system, which uses transmitter and receiver pairs to detect objects and improperly positioned slides, disabling the carousel's rotation when obstacles are detected, and features a multi-color status indicator for slide rack slots to facilitate continuous loading and unloading without a door, reducing vibration and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door is added to enclose the carousel, then operator safety is improved, but vibration increases and continuous loading becomes difficult
Solution Approach 1:
A light curtain acts as an intermediary safety mechanism between the operator and the moving carousel. The light curtain creates an invisible protective barrier that detects operator presence and prevents carousel operation, eliminating the need for a physical door while maintaining safety and allowing continuous access for loading.
2Productivity
If the carousel rotates continuously to improve throughput, then productivity increases, but safety hazards increase for operators
Solution Approach 1:
The light curtain system provides real-time feedback about operator presence to the carousel control system. When the light curtain is interrupted by an operator's hand or body, the system immediately receives feedback and stops the carousel rotation, preventing injury while allowing continuous operation during normal processing.
Solution Approach 2:
The carousel operation mode dynamically changes based on light curtain status. The system transitions between rotating (high productivity) and stopped (safety) states automatically, optimizing both throughput and safety by adapting the motion state to current operational conditions.
3Reliability
If manual inspection of slide positioning is performed, then slide damage is prevented, but processing time increases
Solution Approach 1:
Optical sensors replace manual visual inspection of slide positioning. The sensors automatically detect whether slides are properly loaded in the racks, eliminating the need for operators to manually check each slide while preventing damage from improper loading, thus maintaining protection without increasing processing time.
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 solution effectively prevents accidents by disabling the carousel when objects or improperly positioned slides are detected, ensuring operator safety and protecting valuable glass slides from damage, while allowing continuous loading and unloading to enhance operational efficiency.
Implementation Method 1
A digital slide scanning apparatus with a slide rack carousel that includes a safety light curtain system, which uses transmitter and receiver pairs to detect objects and improperly positioned slides, disabling the carousel's rotation when obstacles are detected
Data Source
Figure 1~2
Figure 3
Figure 4A
AI summary
A digital slide scanning apparatus includes a safety light curtain that operates to disable the motor that rotates the carousel when the presence of an object (e.g., the fingers of an operator) is detected within a predetermined area of the carousel. The light curtain also operates to disable the motor that rotates the carousel when an improperly positioned glass slide or slide rack is detected. The digital slide scanning apparatus also includes a multi-color status indicator for each rack slot that indicates the rack slot location of an improperly positioned glass slide or slide rack.