文档介绍：本科毕业设计
题目:基于单片机的无绝缘导轨的补偿电容测试
性质:科研
专业:电子信息工程
日期:XXX年XX月
摘要
补偿电容是无绝缘轨道电路的重要组成部分,它显著的减少了轨道电路的固有损耗,对改善轨道电路的传输特性起到了非常重要的作用,但是由于外界或人为的因素导致电容电特性参数漂移或损坏,进而引起轨道输入电压下降,影响了轨道信号的传输,因此为保证铁路信号可靠、有效的传输,如何方便的对电容进行正确的测试显得非常重要.
本文主要研究对轨道补偿电容的测试,在文中介绍运用被动测量的方法对电容进行测试,首先介绍了无绝缘导轨的发展背景以及构成特点,第二部分介绍了补偿电容在无绝缘导轨中的重要作用。第三部分对测试仪器的正弦波发生部分,缓冲部分,放大部分,滤波器部分,单片机处理计算部分和电容值显示部分进行说明,第四部分对软件部分进行说明,并得出结论。
关键词被动测量补偿电容单片机原理图源程序
Abstract
Equalizing capcitance is a important part of uninsulated orbit circuit,it decreases the inherentullage of the orbit circuit distinctly and play an important action in improving the characteristic of the orbit because of outside or man_made factor the paremeter of the capcitance’s electrific characteristic may make excursion or be damaged And moreover,it causes the voltage input the orbit to decrease and so that it affects transmission of the orbit ,to make sure the signal of railway be transferd reliably and effectively,how to test the capcitance easily and accurately is important.
This paper mainly researches that how to test the Equalizing capcitance ,In the paper we introduced that how to test the Equalizing capcitance with the method of passively test,First,we introduced the background and the structure’s characteristic of the uninsulated orbit .second,we introduced the importance of the Equalizing capcitance in uninsulated orbit circuit and the request to the Equalizing capcitance of uninsulated orbit circuit, The third ,we make an explaination of every part of the circuit such as ,power part ,buffer part , amplifer part,filter part,MCU process part and display part .The fourth, Introuduce software . Than we analyse the result of tested and get a conclusion.
Keywords passively test Equalizing capacitance MCU
schematic sourceprogram
目录
摘要 I
Abstract II
第1章绪论 1
课题背景 1
UM71 绝缘轨道电路概述 1
UM71 的构成和基本原理 2
UM71的基本原理 2
在中国的引进和发展历程 2
关注的问题 4
本章小结 5
第2章补偿电容的作用及导轨电路对电容要求 6
补偿电容对调整状态的作用 6