发表于:2007-11-14 14:17:00
楼主
Modernization of Automated Handling System in Railroad Maintenance Facility Results
in Increased Reliability and Less Overtime for Facility Personnel
Contemporary Controls' Ethernet Managed Fiber Optic Switch Helps to Make the Difference
Introduction
When a major commuter railroad looked to modernize its 20-year-old automated material handling system in one of its maintenance facilities, the designs they found were not a perfect fit. That has since changed.
One Systems Integrator (SI) modified individual pieces or the system's subsystems. In the last three decades, this SI has focused on automated material flow solutions with more than 1,000 large systems operational in North America today.
To deliver the best system to its customer, the SI opted to choose an industrial-grade, Ethernet managed fiber optic switch from Contemporary Controls of Downers Grove, Illinois. The EICP8M-100T/FC would be employed to connect the control equipment to the network. Over the years Contemporary Controls has become increasingly involved in this technology with a good understanding of the issues and challenges for successful Ethernet installations.
The Story
The maintenance facility has 14 parallel tracks inside the building, and each one can accommodate six cars at a time. All maintenance and any upgrade to the trains is performed at this facility. In addition, new trains are commissioned, and old trains are decommissioned and taken out-of-service at this shop.
Within the facility, seven subsystems comprise a fairly complicated automated material handling system. A subsystem is a piece of the system which is defined by the type of equipment and/or the function of the equipment. Six subsystems work together allowing parts and supplies needed for train maintenance to be received, stored and delivered to the appropriate area of the facility when required. These are as follows:
Receiving Conveyor
Unit Load Storage/Retrieval Machines
Unit Load Conveyor System
Mini Load Storage/Retrieval Machines
Mini Load Conveyor System
Central Monitoring System
The seventh subsystem (the Train Movement Alarm System) manages the movement of train cars in and out of the facility.
The two unit load storage/retrieval machines store pallet loads in a steel rack structure