【作者】 陈勇；

【导师】 赵建；

【作者基本信息】 西安电子科技大学 ， 测试计量技术及仪器， 2011， 硕士

【摘要】 网络时代的到来,极大地推动了测量仪器的网络化。基于网络的LXI总线技术应运而生,在短短的几年中,LXI技术得到了极大的发展。各种多功能的LXI仪器已经上市,随着技术的发展,将会有越来越多的LXI仪器出现。本文对LXI技术做了深入的研究,在LXI的B类仪器中,需要得到IEEE1588精密时钟同步协议的支持。针对应用的需要,本文研究了LXI主时钟模块的实现方法,这也是一个LXI的B类仪器,而其核心功能就是实现LXI设备之间的精密时钟同步。所以,本论文的重点就在于研究IEEE1588精密时钟同步协议的实现方法。在论文中,IEEE1588精密时钟同步协议是通过移植PTPd程序实现的,这是一个基于Linux的纯软件的PTP程序,它具有相当好的可移植性,可以很方便地移植到硬件时间戳平台上。本文对其进行了详尽的分析以及测试,其精度在TE2410的开发板可以达到10微秒级。在LXI协议的支持上,对LXI的WEB服务器和基于VXI-11的LXI仪器发现机制上进行了研究。在WEB服务器上完成了HOME页面和同步页面的显示,并且实现了动态页面的显示功能。硬件支持的PTP技术是未来PTP技术的发展方向,所以在本文的最后,对硬件支持的PTP技术进行了一些简单的研究。更多还原

【Abstract】 The arrival of the network times, greatly promoted the instrument into networking. The LXI bus technology which based on the network arises at the historic moment, just in a few short years, LXI technology has been great development. Various multi-function LXI instrument already appear on market, with the technical development, there will be more and more LXI instruments appear.This paper does the thorough research on the LXI technique. The class B LXI instruments support IEEE1588 Precision Time Protocol. This paper is about a LXI master clock module, which is also a class B LXI instruments, and its core function is clock synchronized, therefore the focus of this paper is that IEEE1588 Implementation.The implementation of the IEEE1588 Precision Time Protocol is transplantation from a program called PTPd . This is a PTP program based on Linux, which has a very good portability, and can be easily transplanted to the hardware timestamp platform. This paper analysis the PTP program and test it , the accuracy on TE2410 board can be up to 10 microsecond. In support of LXI protocol, the paper researchs on the WEB server and the LXI instrument discovery mechanism based on VXI-11. The WEB server realized the home page and synchronous page , and realized the dynamic page display.The hardware support PTP technology is the development direction of future. So in the last chapter, this paper does some simple research on the hardware support PTP technology.更多还原