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SOLUTION
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SERVICE SUPPORT
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ABOUT
Intelligent Warehousing Industry Solutions
project
A certain intelligent three-dimensional warehouse focuses on "high-density storage+efficient unmanned operation", equipped with 10 meter high heavy-duty shelves, 6 aisle stacker cranes, and 6 track RGVs. Its core business relies on real-time collaboration between stacker cranes, RGVs, and WMS/WCS systems.
Core requirements
·Real time performance:
The stacker crane needs to accurately execute the actions of "lifting, walking, and fork extension", while the RGV needs to efficiently complete the task of "cargo transfer", and the two interact with WMS/WCS instructions;
·Reliability:
The 10 meter high shelves in the vertical warehouse form a dense metal shielding area. The stacker crane moves along a 150 meter long aisle, and the RGV shuttles along a 300 meter track, which needs to resist metal shielding and electromagnetic interference from the motor, while ensuring "zero interruption" of communication during equipment movement.
·Stability:
Six stacker cranes and six RGVs need to be connected to the network simultaneously to avoid network congestion caused by concurrent communication between multiple devices and ensure stable transmission speed and signal strength operation requirements.
Solution Design
For the scenario where the stacker crane moves along a 150 meter long aisle and between 10 meter high shelves, a redundant design of "dual frequency industrial bridge+dedicated client" is adopted to solve the problems of metal obstruction, long-distance communication, and electromagnetic interference:
·Industrial Bridge Deployment: Two KXA-3100 D5N industrial bridges are deployed on the top crossbeam of each stacker crane tunnel (avoiding shelving obstruction), operating in dual frequency bands of 5.2GHz and 5.8GHz, with a distance of 50 meters between the two bridges, to ensure that the stacker crane can receive dual frequency signals at any position in the tunnel, with a signal strength of ≥ -60dBm
·Special client configuration: The stacker crane control cabinet integrates a "dual frequency redundant KXC 1100-5N client", which supports receiving signals from two KXA-3100 D5N bridges simultaneously. The client is directly connected to the stacker crane PLC through Ethernet, achieving low latency connection of "PLC instruction network transmission".
For the scenario where RGV shuttles along a 300 meter track and requires frequent docking with stacker cranes and inbound/outbound conveyor lines, an intelligent roaming design of "dual frequency AP+high-performance client" is adopted to solve the problems of long track coverage and fast switching:
·Dual frequency AP deployment: Deploy 2 KXA 5100-5N dual frequency wireless APs on both sides of the 300 meter RGV track column, with a distance of 150 meters between APs, to ensure full signal coverage of the track, and adjacent AP signal overlap rate ≥ 40%, avoiding signal blind spots when RGV moves to the middle area of the track;
·Client configuration: Each RGV is equipped with one KXC-1100 5N client, built-in quad core processor, supports Wi Fi 6 protocol, and the client is directly connected to the RGV controller through RS485 interface to achieve fast response of "task instruction action execution".
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