基于LabVIEW的熱敏電阻溫度計(jì)設(shè)計(jì)與實(shí)現(xiàn)

電子信息工程論文編號(hào):DZXX112  論文字?jǐn)?shù):10765,頁數(shù):31

 目錄

摘要 I
ABSTRACT II
目錄 III
第1章 引言 1
1.1 背景 1
1.2 NTC熱敏電阻介紹 1
1.3 NTC熱敏電阻與溫度的關(guān)系 2
1.4 NTC一熱敏電阻串、并聯(lián)電路的線性特性 3
第2章 線性化處理 6
2.1 MATLAB的發(fā)展與應(yīng)用 6
2.2 多項(xiàng)式擬合 7
2.2.1 阻值與溫度的關(guān)系 7
2.2.2 MATLAB程序 8
第3章 NI ELVIS電路連接 11
3.1 NI ELVIS簡(jiǎn)介 11
3.2 外部電路 12
第4章 LabVIEW程序 13
4.1 LabVIEW概述與應(yīng)用 13
4.1.1 LabVIEW的特點(diǎn) 14
4.1.2 LabVIEW應(yīng)用領(lǐng)域 15
4.2 虛擬儀器的介紹 15
4.2.1 虛擬儀器的特點(diǎn) 16
4.2.2 虛擬儀器的應(yīng)用 17
4.3 程序設(shè)計(jì) 18
4.3.1 LabVIEW程序設(shè)計(jì) 18
4.3.2 前面板顯示 22
第5章 結(jié)束語 25
致謝 26
參考文獻(xiàn) 27

摘要

 熱敏電阻是利用半導(dǎo)體的電阻隨溫度顯著變化這一特性制成的一種熱敏元件。具有對(duì)熱敏感、電阻率大、體積小和熱慣性小等特點(diǎn)，是測(cè)溫、控溫的重要器件。因此，在實(shí)驗(yàn)室、生物體溫計(jì)、家用電器和工業(yè)測(cè)溫等方面應(yīng)用非常廣泛。
 NTC熱敏電阻是一種負(fù)溫度系數(shù)熱敏電阻，該產(chǎn)品的電阻值隨溫度升高而降低，主要用于溫度補(bǔ)償、溫度測(cè)量和在各類電源中作為線路保護(hù)元件。
 在設(shè)計(jì)中對(duì)熱敏電阻的非線性化特性進(jìn)行線性化處理，通過MATLAB對(duì)采集的數(shù)據(jù)進(jìn)行多項(xiàng)式曲線擬合達(dá)到本設(shè)計(jì)的要求。

關(guān)鍵詞： 熱敏電阻，線性化處理，虛擬儀器
 
 
 ABSTRACT
 Thermistor is to use the semiconductor resistance with temperature significant change in the characteristics of components made of a thermal. Is sensitive to heat,the rate of resistance,small size and characteristics of small thermal inertia,is the temperature,the temperature control device important.Therefore,in the laboratory,biological thermometer,household appliances and industrial temperature applications such as very broad.
 NTC thermistor is a negative temperature coefficient of thermal resistance, the resistance value of the product with increasing temperature lower, mainly used for temperature compensation, and temperature measurements in all types of power lines as the protection of components.
 In the design of the thermal resistance characteristics of the nonlinear linear processing, through the acquisition of MATLAB data polynomial curve fitting to the design requirements.

Keywords:  Thermistor, Linear treatment, Virtual Instrument