Design And Realization Of The Blue Print For The Management And Control System In Sinopec Gas Station

In order to accept the challenge,brought along with WTO and economic globalization, Sinopec ,one of the domestic oil products retail corporation, utilizes advanced electronics information techonology and bases its functions on IC card to realize automation of oil products retail system and achieve its goal "one card in hand, filling countrywide" .Before, partial petrol exploitation companies in several provices have different criterions for its own gas station control system .which is regionally restricted and can't meet the demand of corporation development. By introducing its hardware structure .software structure, database structure and its safety maintentance, data trasfer protocol, system safety and secrecy, and data reliability ,a new kind of gas station control system shows us great advantage and the coming future of gas station control system.Above all, On designing the software system,according to gas station's requirement and duty,I devide the software part into two parts: barginning sub system and management sub system.And to each part, modularization is taken and flowchart of each module is given as follows.Besides, checkout mechanism is put into use to assure data reliability.During the process of designing central computer system software, on the basis of original programme, I reconstruct its functions and structures and realize greaser's two-mode woking patterns, grearser initiated mode and upper control computer intitated model ,both of which enriches working patterns of gas station. When I design the commucation block between the greaser-control system and PC, a certain rule should be abided by. Former greaser-system has only one data exchange mode:, i.e :upper control computer inititated the course of data exchange and greaser answers to it,which is called upper computer inititated mode. Now ,besides this mode, a greaser initiated mode is also taken.called greaser initiated mode. With these two modes combined together .efficiency of gas station is greatly improved.In this system ,data communication between greaser and the upper computer is realized directly by command.Based on the physical network distribution of IC card system ,its requirement and duty, and basic system designing rules, this paper takes distributing structure to set up gas station's database.Besides, concrete configuration of database centre on all levels is...