Optical AGV-Load Port Communication Layout to Reduce Wiring Crosstalk
Solution Overview
Problem
In semiconductor manufacturing plants, the existing automated transport systems require complex and time-consuming wiring for optical communication between automated guided vehicles and load ports, leading to potential crosstalk issues due to noise interference.
Innovation Solution
A communication system where first and second communication units are connected in one line, eliminating the need for separate connections between multiple communication parts, using a master-slave polling method to prevent simultaneous signal transmission and reduce noise interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate connections are made between each load port and port-side optical IO, then communication reliability is improved, but wiring complexity increases and installation time is extended
Solution Approach 1:
The system divides communication functions into two units: a first communication unit with multiple first communication parts connected to load ports, and a second communication unit with multiple second communication parts connected to the automated guided vehicle. Each first communication part corresponds to a specific load port, enabling segmented communication paths that maintain reliability while simplifying overall wiring architecture.
Solution Approach 2:
Multiple first communication parts and second communication parts are connected through a shared communication line rather than requiring separate dedicated connections for each pair. This merging approach reduces wiring complexity and installation time while maintaining communication reliability through the structured pairing mechanism.
2Reliability
If separate connections are made between each load port and port-side optical IO, then signal transmission quality is improved, but installation time is extended
Solution Approach 1:
The system establishes predetermined pairing relationships between first communication parts and second communication parts before actual communication occurs. This preliminary configuration allows for faster installation as the pairing structure is already defined, eliminating the need for complex real-time connection setup while maintaining signal transmission quality.
3Reliability
If multiple separate communication lines are used, then communication reliability is improved, but crosstalk from noise increases
Solution Approach 1:
Multiple communication pairs share a common communication line structure, reducing the total number of separate cables required. This merging approach minimizes the sources of electromagnetic interference and crosstalk that would otherwise be generated by numerous adjacent separate connections, while the pairing mechanism ensures reliable communication through structured signal routing.
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
This configuration simplifies wiring, reduces installation costs, and minimizes noise-induced crosstalk, enhancing the efficiency and reliability of communication between automated guided vehicles and load ports.
Implementation Method 1
a first communication unit 12 having a plurality of first communication parts 12a to 12d configured to perform optical communication with the automated guided vehicle 204
Data Source
AI summary
A communication system for transmitting and receiving signals between an automated guided vehicle and a load port of a substrate processing device includes a first communication unit having a plurality of first communication parts configured to perform optical communication with the automated guided vehicle and connected to each other via a first communication line, and a second communication unit having a plurality of second communication parts respectively connected to a plurality of load ports and connected to each other via a second communication line. The plurality of first communication parts each constitute a pair with a predetermined one of the plurality of second communication parts. Also, one of the plurality of pairs is set as a communication pair, and signals are transmitted and received between the plurality of first communication parts and the plurality of second communication parts via the communication pair.