摘 要

在企业用人成本增加、机器监控要求提高的状况下，我们以上汽通用五菱（SGMW）柳州公司的冲压车间为对象，设计了一套冲压车间压力机数据采集的系统方案，满足了实时性监控的需求，提高了监控的可靠性和稳定性。

本文以冲压车间压力机设备为对象，基于CIP（通用工业协议）三层网络设计了一套电流、电压、电功率采集方案，实现了分布式控制系统(DCS)的功能，实现了远程化、实时化和自动化。本文主要包括两个方面的设计：监测节点的设计和软件组态设计。

监测节点的设计，选择ADE7878计量芯片来采集电流电压信号，并进行A/D转换，计算脉冲得到电功。ADE7878与AT89S52单片机连接组成采集电路，并设计DeviceNet接口电路，采用先进的DeviceNet现场总线技术，连接车间生产线内分布的I/O节点。其中主要包括采集电路设计、主控电路设计、DeviceNet接口设计、节点设备的初始化与走线设计,并选择ControlNet现场总线完成三条生产线内三台控制器与工作站PC的连接，并对各I/O节点完成模块组态；软件组态设计，包括利用RSView32完成上位机监控人机界面的设计，完成RSLinx与SQL Server的通讯设计：具体采用VB编程，利用双方共有的OPC通讯功能，完成数据传递，通过标签（Tag）访问,将数据保存至SQL Server方便后续使用。

本文提出了一种先进的数据采集与设备监控的方案，基本满足了柳州汽车对压力机监控的需求，对工厂设备的实时性监控有一定的参考价值。

关键词：数据采集，监测节点，通用工业协议，OPC,实时性

Abstract

Now for factory, the cost of employing persons is increasing and the requirements of machine monitoring are improving. Under these conditions, we design a strategy for a system which can collect the data of press in stamping workshop. The object of this system is the stamping workshop in Liuzhou Department of SGMW. This system can satisfy the requirement of real-time monitoring, so it improves the reliability and stability of monitoring.

This article designs a project which can collect current, voltage and electric power. Our object is press equipment in stamping workshop. This design which depends on CIP three layers of the network implements the function of the distributed control system (DCS) and completes the requirements of remoted, networking and automation. The design in this article mainly includes two aspects: design of monitor nodes、design of communication in software configuration.

In the design of monitor nodes, we choose ADE7878 metering chip to collect the signal of current and voltage. Then, we make the A/D conversion and calculate the pulse to get electrical work. We connect ADE7878 and AT89S52 Single Chip Microcomputer to form the collecting circuit. We also design DeviceNet interface circuit. We connect the I/O nodes which distribute in the production line of workshop the workshop with each other, using the advanced DeviceNet fieldbus technology. These mainly include the design of acquisition circuit、the design of main control circuit、the design of DeviceNet interface、the initialization of nodes and wiring，then choose ControlNet fieldbus to connect three controllers in three production lines with the PC in workstation as well as complete the module configuration of each I/O nodes; As for software configuration, we complete the Human Machine Interaction design of upper computer monitoring, mainly by using RSView32. We complete the communication design of RSLinx与SQL Server: making use of communication function that both sides have in common to complete data transfer, specifically by using VB programming and save data in SQL Server for longer use by tag access.

This article comes up with an advanced strategy for data collecting and equipment, which satisfies the requirements of press monitor for Liuzhou Department of SGMW on the whole monitor and is meaningful to real-time monitoring of factory equipment.

Key Words：Data collection, monitor nodes, CIP, OPC, real-time

目录

摘要.....................................................................................................................................I

Abstract...............................................................................................................................II

第1章 绪论......................................................................................................................1

1.1 研究背景及意义.....................................................................................................1

1.2 国内外研究现状与发展趋势.................................................................................2

1.3 课题来源.................................................................................................................3

1.4 主要工作内容.........................................................................................................3

第2章 设计方案的比较..................................................................................................5

2.1 车间环境简述.........................................................................................................5

2.2 通信方案的比较.....................................................................................................5

2.2.1 无线网络技术..................................................................................................6

2.2.2 总线技术..........................................................................................................7

2.3 通信方式的确定.....................................................................................................9

2.3.1 初步确定..........................................................................................................9

2.3.2 确定具体通讯类型..........................................................................................9

2.3.3 系统整体方案..................................................................................................9

第3章 监测节点设计....................................................................................................11

3.1 CIP协议分析.........................................................................................................11

3.1.1 CIP的特点......................................................................................................12

3.1.2 CIP的对象模型..............................................................................................14