Abstract: To solve the current situation that domestic Gas station’s information management level is low, Gas station’s real-time data monitoring system has been developed which can support many protocols and communicate with different kinds of oiling machines, realizing the function of oiling machines’ real-time data automatically collecting and displaying and saving. The system adopts master-slave distributed structure, and upper ones are responsible for data's analysis and uploading and output of report form. Lower ones are responsible for collecting oiling machines’ real-time data and implementing the feedback to computers in time. Communication between controller and upper ones adopts interrupt model. It has important sense for solving the situation which oiling machines are their own master and raising Gas station’s information management level.

Key words: data acquisition, communication protocol, serial communication

摘要： 针对当前国内加油站信息化管理水平低的现状，开发了加油站实时数据监测系统，支持多种协议，可与不同类型的加油机通信，实现加油机实时数据的自动采集、显示、存储。采用主从分布式结构，上位机负责数据的处理、分析及上传、报表的输出等，下位机实时采集加油机重要数据，并及时向计算机反馈。控制器和上位机的通信采用中断模式。对解决目前加油机自成体系、相互独立的局面，提高加油站管理水平,具有重要意义。

关键词: 数据采集, 通信协议, 串行通信