Ceiling Rail Transport Inspection Scheduling for Early Fault Detection
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Solution Overview
Problem
There is no effective method to check the state of transport devices suspended on factory ceilings before they break down, leading to potential interference with other devices and reduced productivity in semiconductor manufacturing facilities.
Innovation Solution
A transport device inspection system comprising a diagnostic server, inspector, and transport device controller that creates inspection schedules, inspects devices sequentially, and diagnoses abnormalities based on inspection results.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If transport devices are suspended on ceiling rails for space efficiency, then factory floor space is optimized, but accessibility for inspection and maintenance is lost
Solution Approach 1:
The patent introduces a robotic inspection device as an intermediary agent that travels along the rail to access and inspect transport devices suspended on the ceiling. This mediator enables inspection functionality without requiring physical access from the factory floor, thus preserving space efficiency while restoring inspection capability.
2Productivity
If transport devices operate continuously without interruption, then productivity is maximized, but undetected abnormalities lead to sudden breakdowns
Solution Approach 1:
The patent implements preliminary inspection actions by the robotic device that detects abnormalities in transport devices before they cause breakdowns. The system performs proactive monitoring of critical components, enabling maintenance to be scheduled during planned stoppages rather than experiencing unexpected failures that disrupt continuous operation.
Solution Approach 2:
The inspection system provides continuous feedback about the state of transport devices to the control system. This feedback mechanism enables real-time monitoring and alerting, allowing operators to respond to degradation trends before they result in failures, thus maintaining both productivity and reliability.
3Loss of energy
If inspection is performed after breakdown, then maintenance resources are conserved, but productivity is severely impacted
Solution Approach 1:
The system performs preliminary inspections that detect early signs of failure, enabling maintenance to be scheduled proactively rather than reactively. This shifts the maintenance timing to planned intervals when productivity impact is minimized, while still preventing catastrophic failures that would require extensive repair resources.
Solution Approach 2:
The robotic inspection device enables the transport devices to essentially self-diagnose their own condition through automated monitoring. This self-service capability detects abnormalities early without requiring human intervention or resource expenditure until maintenance is truly necessary, optimizing both resource usage and productivity.
4Productivity
If multiple transport devices share the same rail, then system efficiency is improved, but stopping one device interferes with others
Solution Approach 1:
The patent extracts the inspection function from the transport devices themselves and places it on a separate robotic inspection device. This allows the transport devices to remain on the rail for continuous operation while the inspection function is performed independently by the robotic device that can pause and inspect without requiring the transport devices to stop or leave the rail.
Data Source
AI summary
A transport device inspection system includes a plurality of transport devices configured to move along a transport path, a diagnostic server configured to create inspection schedule information for the plurality of transport devices, an inspector configured to receive the inspection schedule information from the diagnostic server and to sequentially inspect the plurality of transport devices in accordance with the inspection schedule information, and a transport device controller configured to receive the inspection schedule information from the inspector and to control the plurality of transport devices to sequentially move to an inspection position in accordance with the inspection schedule information.