摘要
随着计算机技术、微电子技术以及通信技术的发展，工业领域中的信号传输
从模拟信号传输转换到了数字信号传输，这使得现场设备之间传输信息的能力大
大增强。也因此诞生了一门新的技术--现场总线技术。现场总线是应用在工业
生产现场，用于实现在智能测量仪表、控制单元、执行机构和其他现场设备之间
进行数字信息交换的通信网络。但工业控制领域需要一种高速廉价的网络。在过
去几年里，以太网标准有了许多进步，特别是确定性、速度和信息优先级等方面。
交换技术的快速发展大大消除了以太网应用于控制领域的障碍。目前许多组织和
公司致力于将以太网与现场总线实现无缝连接，发展的趋势是以太网越来越向底
层延伸。
基金会现场总线(Founndation Fieldbus)在众多的现场总线中脱颖而出，
成为技术上最先进的现场总线，FF总线的实现将促进我国自动化系统的数字化和
智能化。基金会HSE现场总线是IEC61158通过的8种国际现场总线技术标准之一，
HSE协议基于以太网和TCP／IP协议，从而HSE现场总线比基金会原先的H1总线的速
度快得多。
本论文主要研究丌发HSE协议，包括HSE协议栈中的SMPM模块的软件开发、
SNTP模块的软件开发；并对基于HSE协议构建高速、实时的控制网进行了研究。
本论文的主要工作包括如下几个方面的内容：
1、 介绍了HSE协议体系结构，并主要分析了SMPM的运行原理，并用C语言实
现了SMPM层协议。论文中给出了SMPM的编程框架以及一些关键算法的实
现，经测试取得理想的结果。
2、 研究分析了HSE协议中SNTP协议的原理，分析了SNTP协议的数据结构、
算法实现，我们给出了编程框架，并用C语言实现了SNTP客户端软件，经
测试取得理想的结果。
3、 在介绍了传统HSE控制网络体系结构的基础上，根据以太网交换机的原理，
我们设计了基于交换机的交换式HSE控制网络，并分析了交换机的延迟特
性，根据实时性要求，给出了处理方案。在一些控制系统中，要求应用无
浙江大学硕士学位论文 ＊
线通信技术，我们以 HSE协议为基础并结合 IEEE802．口卜协议标准，设计
了一种现场级无线通信协议栈，该协议能满足实时通信的要求。
With the fast development of computer technology, micro-electronics and communication technology, the analog signal transmission in the industry has transformed to the digital one. This enhances the interdevice communication, and
therefore a new technology------fieldbus comes into existence. Fieldbus is a
communication network used to interconnect field devices such as intelligent measurement instruments, control devices, executive machines. High speed and low cost network is needed in process control area. In the past several years, the standard of Ethernet had been improved much especially on determination, speed and information priority. Because of the rapid development of the exchanging technology, the impediment of adopting Ethernet in control area is eliminated greatly. Recently, many organizations and companies are working on the implementation of seamless connection of Ethernet and fieldbus. This developing tread makes Ethernet extend into lower layer.
FF is coming to become the advanced fieldbus technology out of all fieldbus technologys. Implementation of FF protocol is helpful for the development of digital and intelligent automatic control system. FF-HSE Protocol developed by FF has become one of the eight parts of IEC61158 standard. HSE Protocol operates on Ethernet and TCP/UDP protocol, which makes HSE Fieldbus has much higher communication speed than tranditional FF-H1 Fieldbus.
In this thesis, HSE Protocol is studied and implemented, which mainly includes the software accomplishment of SMPM module, the software accomplishment of SNTP module. Finally, Design high-speed and real-time industrial control network based on HSE Feildbus is also studied. In this dissertation, the main contributions are as follows:
1) HSE Protocol architecture is introduced, and the principles of SMPM are mainly analyzed, then the software implementation of SMPM based on C Language is given. In this dissertation, we give the programming architecture of SMPM and the implementation of some of the critical algorithms. Satisfying results are got throuth testing.
2) The principles of SNTP , which is one of the important modules in the HSE Protocol architecture, are studied, the data architecture and the algorithm implementation of SNTP are also analyzed. We give the programming architecture and the software implementation of the client software of SNTP based on C Language. Satisfying results are got through testing.
3) Based on the introduction of traditional HSE control netwok, according to the principles of switch, we design switched HSE control network based on switch. In order to improve the real-time capability, after the analyzing of the characters of switch delay, some improvement methods are given . According to the wireless communication requests invoked by some industrial applications, we put forward a new field level wireless communication specifications. The new protocol is based on the FF-HSE specifications and integrate the IEEE802.11b standards. The new protocol can not only synchronize the wireless devices but also perform the real-time communication.
引文
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