| The oil depot based in XiGu, which is owned by Lanzhou branch company of the northwest oil selling company of the CNPC is the oil products distribution center with operations of railway, road and pipeline transport. It plays an important role in coordinating production, transportation and selling of the oil products in the northwest region. This paper covers the part of loading oil products for road transport. Through application of the automatic information management system to the system of the road vehicle oil loading, the operation can be better coordinated and directed. With the greater demands for oil products supplies and extension of oil houses, there arise some unsteady factors in the oil product quantity management system for road transport, which was jointly implemented in 2002 by the CNPC Longhui company and Zhongruan Software company. Hence, it requires urgently to be modified and upgraded.The system is upgraded according to the practical amount of supply at oil deport and guided by principle of planned supplies, transforming the current "road vehicle oil loading information management system and integrating the current system. The new system is of advantages of being simple and practical, easy to upgrade, with better embeddings and user-friendly interfaces, easy to operate, etc. In the meanwhile, it avoids data repetition, realizes integration with the business operation system and offers ERP interface, which can be used for sharing data and increasing operation efficiency. This will make it easy to carry out planning and management, and it also optimizes road vehicle loading operations and performs dynamic monitoring of the whole road vehicle loading operations. It makes the management of the road vehicle loading system more scientific and automatic, greatly increasing the efficiency of road vehicle loading operations.The system is designed to be of three parts, including control, interfaces, and management system. By replacing the original WINCC component system with OPC SERVER system and sealing up the interface of the control system, the stability of the equipment on sites and system control signals are ensured, and the maintenance of the control system is also simplied. Meanwhile, the client-terminals of the monitoring and control system is integrative sealed up by means of C/S structure to separate the database from the client-terminals, which reduces the risk of interrupting oil distribution due to problems arised at the client-terminals. It is also much easier to install and maintain the client-terminals of the system.The system has been successfully applied after strict testing and trial operation. Now this system has solved the problems of the original one and reached its design goal. |
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