Carousel Light Curtain for Safe Slide Loading and Rotation Stop
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Solution Overview
Problem
Digital slide scanning apparatuses pose safety hazards for operators due to moving parts and risk of damaging glass slides when handling hundreds of slides, as existing systems lack effective safety measures to prevent accidents and slide damage.
Innovation Solution
A digital slide scanning apparatus with a slide rack carousel equipped with a safety light curtain that disables the carousel's rotation upon detecting an object or improperly positioned slides, ensuring operator safety and slide protection through continuous loading and unloading without a door, and using a multi-color status indicator for slide rack slots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door is added to enclose the carousel, then operator safety is improved, but vibration is increased and continuous loading is hindered
Solution Approach 1:
The patent removes the door entirely from the housing, extracting the enclosure element that would cause vibration and block continuous loading. Instead, a light curtain safety system is implemented that provides safety without physical enclosure, thus eliminating the vibration problem while maintaining operator protection.
Solution Approach 2:
The patent replaces the mechanical door enclosure system with an optical detection system (light curtain). The light curtain uses electromagnetic fields rather than mechanical structures to provide safety, eliminating the vibration caused by mechanical doors while maintaining the safety function through optical detection of operator presence.
2Reliability
If a door is added to enclose the carousel, then operator safety is improved, but continuous loading and unloading is prevented
Solution Approach 1:
The patent removes the door entirely from the housing, extracting the enclosure element that would prevent continuous loading. Instead, a light curtain safety system is implemented that provides safety without physical enclosure, thus eliminating the blocking effect while maintaining operator protection.
Solution Approach 2:
The patent replaces the mechanical door enclosure system with an optical detection system (light curtain). The light curtain uses electromagnetic fields rather than mechanical structures to provide safety, eliminating the physical barrier that would prevent continuous loading while maintaining the safety function through optical detection.
3Productivity
If the carousel rotates continuously to process multiple slides, then productivity is improved, but safety hazards increase for operators
Solution Approach 1:
The light curtain is positioned to detect operator presence before the carousel can complete a rotation that would cause harm. The system takes preliminary action by detecting potential danger and stopping the carousel before the harmful event occurs, thus maintaining productivity while preventing safety hazards.
Solution Approach 2:
The light curtain provides continuous feedback about operator presence to the carousel control system. When the light curtain detects an operator in the hazardous zone, it sends a signal to stop the carousel, creating a feedback loop that maintains safety while allowing continuous operation when the zone is clear.
4Productivity
If the carousel rotates at high speed to increase throughput, then productivity is improved, but the risk of damaging glass slides increases
Solution Approach 1:
The system performs preliminary checks using the light curtain to detect improper slide or rack positioning before the carousel begins rotation. By detecting positioning errors in advance and preventing rotation, the system avoids high-speed damage to improperly positioned slides while maintaining high throughput for properly positioned items.
Solution Approach 2:
The light curtain provides feedback on slide and rack positioning, allowing the control system to adjust carousel operation accordingly. When improper positioning is detected, the feedback signal modifies the rotation behavior to prevent damage, thus protecting slide integrity while maintaining productivity for correctly positioned slides.
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 operator injury and slide damage by ensuring the carousel remains stationary when objects or improperly positioned slides are detected, facilitating safe and continuous operation while maintaining accessibility for loading and unloading.
Implementation Method 1
A carousel also 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.
Data Source
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.