Merging Path Collision Prevention via Wireless Relay
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Solution Overview
Problem
Existing article transport facilities face challenges in preventing collisions between movable bodies at merging points, as they rely solely on time-based determination of merging completion, which can lead to collisions due to mechanical failures or abnormal stops, and struggle to detect manually intervened movements or stopped vehicles.
Innovation Solution
The facility employs a communication relay device with a sheet-shaped antenna along merging paths and a post-merging path to identify movable body positions and issue operation commands, allowing real-time determination of path occupancy and preventing collisions by transmitting movable body information and identification data to a managing system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If time-based determination is used to manage merging operations, then the system is simple to operate, but collision prevention reliability deteriorates when mechanical failures or abnormal stops occur
Solution Approach 1:
The patent replaces the mechanical/time-based detection system with a wireless communication-based detection system. Instead of relying on time intervals and mechanical sensors, the system uses wireless communication devices on movable bodies to automatically report their positions and statuses to the managing means, which then issues appropriate operation commands. This substitution maintains operational simplicity while dramatically improving collision prevention reliability through real-time position awareness.
Solution Approach 2:
The patent implements a feedback mechanism where movable bodies continuously report their position and status information to the managing means via wireless communication. The managing means processes this feedback information and issues operation commands (proceed, stop, or wait) back to the movable bodies. This closed-loop feedback system ensures reliable collision prevention by constantly monitoring and responding to the actual states of movable bodies, rather than relying on predetermined time intervals.
2Measurement precision
If wireless communication devices are provided to each movable body, then collision detection accuracy is improved, but device complexity increases
Solution Approach 1:
The patent makes the managing means universal by enabling it to handle multiple types of information (position, status, identification) from multiple movable bodies through a single wireless communication infrastructure. The managing means serves multiple functions: receiving wireless signals, determining positions, issuing operation commands, and coordinating all movable bodies. This universality improves collision detection accuracy without proportionally increasing overall system complexity, as the managing means consolidates multiple detection and control functions.
3Reliability
If operation commands are issued based on real-time position information, then collision prevention is improved, but information processing requirements increase
Solution Approach 1:
The patent extracts only the essential information needed for collision prevention from the data transmitted by movable bodies. Instead of processing all possible information, the system focuses on extracting position information, status information (normal/abnormal), and identification information. This selective extraction reduces the information processing load while maintaining reliable collision prevention, as these are the minimum necessary data elements for safe operation management.
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 solution effectively prevents collisions by accurately determining path occupancy and issuing timely operation commands, even in cases of mechanical failures or manual interventions, enhancing safety and efficiency in article transport.
Implementation Method 1
an antenna portion that is provided along the first merging path, the second merging path, or the post-merging path and that forms a communication enabled region over an entire surface of the antenna portion
Data Source
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AI summary
The object is to provide an article transport facility in which movable bodies can merge into a merging portion while preventing collisions between the movable bodies. A communication relay device (26) is individually provided to each of the first merging path (27), the second merging path (28), and the post-merging path (29). Each communication relay device (26) includes an antenna portion (30) that is a sheet-shaped antenna, a relay device main body (33) that associates movable body information obtained by communicating with the movable body communication devices (25) using the antenna portion (30) with identification information which indicates which one of the paths the antenna portion (30) that received the movable body information is provided to, and that is capable of communicating the information thus obtained to the managing means (24). The managing means (24) determines in which path the movable body (3) exists to manage operations of a plurality of movable bodies (3) based on the movable body information and identification information which are received from the relay device main body (33).