交流電橋電路的電壓靈敏度研究

電子信息工程論文編號:DZXX117  論文字?jǐn)?shù):11498,頁數(shù):28

目錄

摘要 I
ABSTRACT II
第1章 引言 1
    1.1 背景 1
    1.2 交流電橋發(fā)展歷史 1
    1.3 研究內(nèi)容 2
第2章 測量電橋 3
    2.1 電橋的分類 3
    2.2交流電橋的工作原理 4
    2.3 交流電橋在傳感器檢測技術(shù)中的應(yīng)用 7
第3章 交流電橋靈敏度 13
    3.1 交流電橋電壓靈敏度的推論 13
    3.2橋臂系數(shù)的討論 15
    3.3結(jié)論 17
    3.4電容電橋電壓靈敏度的比較 17
第4章 仿真實(shí)驗(yàn)設(shè)計(jì)與驗(yàn)證 19
    4.1 Proteus軟件簡介 19
    4.2 實(shí)驗(yàn)仿真過程 19
第5章 結(jié)束語 23
致謝 24
參考文獻(xiàn) 25

摘要

 電橋是用于將經(jīng)由傳感器轉(zhuǎn)換成的電阻、電容、電感等一類電路參數(shù)的變化，進(jìn)一步變換成電壓或電流輸出的測量電路，電橋電路廣泛應(yīng)用于現(xiàn)代檢測技術(shù)中。
 電橋可分為平衡電橋和非平衡電橋，非平衡電橋往往和一些傳感元件配合使用。某些傳感元件受外界環(huán)境（壓力、溫度、光強(qiáng)等）變化引起其內(nèi)阻的變化，通過非平衡電橋可將阻值轉(zhuǎn)化為電壓輸出，從而達(dá)到觀察、測量和控制環(huán)境變化的目的，在工程測量中交流不平衡電橋已經(jīng)得到了廣泛的應(yīng)用。在使用中，用戶可以有不同組橋方式，在研究中發(fā)現(xiàn)，傳感變換元件在電路中的位置不同, 測量結(jié)果明顯不同。
 本文主要介紹了交流電橋的工作原理及在電阻、電容和電感式等傳感器使用中的應(yīng)用，并將根據(jù)交流不平衡電橋的不同的組橋方式，對電橋的電壓靈敏度進(jìn)行理論分析，并根據(jù)理論推導(dǎo)結(jié)果進(jìn)行比較，然后用電容電橋的兩種不同的接線方法做實(shí)驗(yàn)加以驗(yàn)證。

關(guān)鍵詞：交流電橋，不平衡電橋，電壓靈敏度

ABSTRACT
 Bridge is used to convert the a series of circuit parameter such as resistance, capacitance and inductance into voltage or current output of the measurement circuit, the bridge circuit is widely used in modern detection technology.
 Bridge can be divided into Balanced Bridge and Unbalanced Bridge.Unbalanced Bridge often with the use of some sensor. Some of the sensing element by the external environment (pressure, temperature, light intensity, etc.)caused by the change of its resistance changes. Resistance through the Unbalanced Bridge can be converted into a voltage output,then it can be achieved observation, measurement and control of the environmental change. Unbalanced Bridge has been widely used in the engineering survey. User can have different bridge in use,research found that exchange the location of the two sensing elemen,the result is obviously different.
 This paper introduces the operation principle of the bridge and the use of the sensor such as resistance, capacitance and inductance.We analysis the sensitivity of the a.c unbalanced bridge based on the different bridge of the a.c unbalanced bridge, and based on the theoretical results, then we will give out the method of solving the problem.
  
 Keywords: A.C Bridge, Unbalanced Bridge, Sensitivity.