欢迎来到天天文库
浏览记录
ID:816138
大小:1.02 MB
页数:56页
时间:2017-09-07
《学士学位论文_基于热电偶的控温器设计_》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、哈尔滨理工大学学士学位论文哈尔滨理工大学毕业设计题目:基于热电偶的控温器设计-IV-哈尔滨理工大学学士学位论文基于热电偶的控温器设计摘要热电偶(thermocouple)是温度测量仪表中常用的测温元件,它直接测量温度,并把温度信号转换成热电动势信号。各种热电偶的外形常因需要而极不相同,但是它们的基本结构却大致相同,通常由热电极、绝缘套保护管和接线盒等主要部分组成。本文研究开发的抗干扰热电偶控温器,从电路设计、PCB电路板布局布线、到软件设计等方面,对热电偶工作的干扰信号进行滤波处理,使这一热电偶控温器能够在复杂的电磁环境下稳定、可靠地工作。为了达到提高测温精度的目的,需要对热电偶进行冷
2、端补偿,以弥补热电偶冷端处于室温环境时造成的误差;在PCB电路设计中,从电源、电缆、印制板三个层次对热电偶控温器进行抗干扰设计;在软件设计过程中,利用数字滤波技术进一步对干扰信号滤波处理、并用线性插值法求解温度值,最后用模糊算法实现控温器对环境温度的控制。关键词 热电偶;冷端补偿;控温器;抗干扰-IV-哈尔滨理工大学学士学位论文ADesignofThermocoupleBasedTemperatureControllerAbstractThermocouple(thermocouple)isacommonlyusedtemperaturesensortemperaturemeasure
3、mentinstrument,Itmeasurethetemperaturedirectly,andthetemperaturesignalisconvertedintothethermalelectromotiveforceone.Theshapeofthethermocoupleisnotthesamebecausethedifferentneeds.buttheirbasicstructureareroughlythesame,andusuallycomposeofahotelectrode,insulatingsleevetubeprotectorandthejunctionb
4、oxandothermainparts.Thisresearchisabouttheresearchofananti-disturbedtemperaturecontrollerwiththermocoupleasitsthermalsensor.Inordertomakethetemperaturecontrollerworkstablyandreliablyinacomplicatedelectromagneticenvironment,differentmethodsareusedinthedesignstage.Thesemethodscoverdifferentstageso
5、fthedesign,includingthedesignofthehardwarecircuit,thelayoutoftheprintedcircuitboard(PCB),andthesoftwaredesign.Inthedesignofthehardwarecircuit,inordertoimprovetheaccuracyofthetemperaturecontroller,it’snecessarytodosomeworkonthecoldjunctioncompensation.Becausethethermocoupleisusuallyworkwithitscol
6、djunctionintheroomtemperatureratherthaninthestandardof0℃.InthePCBdesignstage,threedesignhierarchiesareusedtomakethetemperaturecontrollerimmunetothedisturbanceoftheelectromagneticenvironment,thesehierarchiesinclude:powersupply,electriccable,andtheprintedcircuitboard.Inthesoftwaredesign,thedigital
7、filterisusedtofinallyfilterthedisturbsignal,andtheFuzzyalgorithmicapproachisusedtorealizethethermalcontrol.Keywords Thermocouple;Coldjunctioncompensation;Temperaturecontroller;Anti-disturb-IV-哈尔滨理工大学学士学位论文目录摘要IAbstractII第1章绪
此文档下载收益归作者所有