Transport Carriage Trigger Control for Wireless Interference Reduction
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Solution Overview
Problem
Existing transport systems experience communication failures due to continuous transmission of trigger signals by multiple communication devices, leading to interference.
Innovation Solution
A control method and system where the transport carriage or communication device transmits a trigger signal only when within a predetermined distance of the specific equipment, reducing unnecessary signal transmission and interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If each communication device continuously transmits trigger signals to search for communication partners, then the system ensures constant availability for wireless communication, but trigger signals from adjacent communication devices interfere with each other causing communication failure
Solution Approach 1:
The patent implements periodic action by having communication devices transmit trigger signals only at specific intervals rather than continuously. The transport carriage periodically broadcasts its position and identification information, and communication devices periodically check for new carriages within their communication range. This periodic transmission pattern reduces signal interference while maintaining communication availability.
Solution Approach 2:
The patent applies local quality by enabling each communication device to independently determine whether to transmit trigger signals based on local conditions - specifically, whether a transport carriage is currently present and needs communication. Each device adjusts its transmission behavior locally rather than following a uniform continuous transmission pattern, thereby reducing interference in areas where no communication is needed.
2Duration of action of stationary object
If multiple communication devices continuously transmit trigger signals, then the system maintains constant readiness for interlock communication, but the quantity of transmitted signals increases leading to mutual interference
Solution Approach 1:
The patent implements self-service by enabling communication devices to autonomously determine when trigger signal transmission is necessary based on detecting the presence of transport carriages. Each communication device monitors its own communication environment and independently decides whether to transmit, reducing unnecessary signals while maintaining readiness when actually needed.
Solution Approach 2:
The patent uses feedback mechanisms where transport carriages periodically broadcast their position and status information, and communication devices receive this feedback to determine whether to initiate trigger signal transmission. This feedback loop ensures that trigger signals are transmitted only when a transport carriage is present and communication is actually required, reducing unnecessary signal quantity.
Data Source
AI summary
In a control method, a controller obtains equipment specifying information that specifies an equipment to which a transportable object is to be delivered, and a transport carriage obtains carriage position information indicating the position of the transport carriage. Any one of the transport carriage, a specific communication device, and the controller calculates the distance between the transport carriage and the specific communication device based on delivery position information indicating the position of a specific equipment and the carriage position information, and determines whether the distance is not more than a predetermined distance. When the distance is not more than the predetermined distance, one of the transport carriage and the specific communication device transmits, wirelessly to the surroundings, a trigger signal to start wireless communication between the transport carriage and the specific equipment, and performs wireless communication to deliver the transportable object between the transport carriage and the specific equipment.