电气工程专业英语+unt7讲解ppt课件.ppt

《电气工程专业英语+unt7讲解ppt课件.ppt》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、电气工程及其自动化专业英语主编杨勇邓秋玲Unit7SensoringTechnology7.1Introduction7.3FurtherReading7.2Sensors7.1IntroductionNewWordsandExpressionssensorn.传感器detectorn.发现者；探测器；检波器；检电器instrumentn.工具；手段；器械；器具；手段mercuryn.水银，汞thermometern.温度计；体温计calibratev.校准elevatorn.电梯；升降机tact

2、ileadj.触觉的；有触觉的；能触知的NewWordsandExpressionsdimadj.暗淡的；悲观的；怀疑的vt.使暗淡；使失去光泽brightenv.（使）变亮；（使）愉快sensitivityn.敏感；灵敏（度）；灵敏性characteristicadj.特有的；表示特性的；典型的n.特性；特征microscopicadj.用显微镜可见的；精微的infraredadj.红外线的n.红外线7.1IntroductionNewWordsandExpressionspropertyn.财

3、产；所有物；所有权；性质；特性logarithmicadj.对数的deviationn.背离offsetn.偏移量；抵消；弥补；分支vt.弥补；抵消vi.偏移；形成分支biasn.偏见；偏爱；斜线vt.（使）存偏见boden.波特图driftn.冲洗；漂流物；观望；漂流v.（使）漂流7.1IntroductionNewWordsandExpressionsdegradationn.降级；降格；退化lagn.落后；迟延；防护套adj.最后的vi.缓缓而行；滞后vt.落后于aliasingn.[数]混

4、淆现象stimulin.激励thresholdn.开始；开端；极限；阈值fatiguen.疲乏；疲劳；累活vt.使疲劳；使心智衰弱vi.疲劳faintn.昏晕；昏倒adj.衰弱的；无力的；暗淡的vi.昏倒；变得微弱7.1IntroductionAsensor(alsocalleddetector)isaconverterthatmeasuresaphysicalquantityandconvertsitintoasignalwhichcanbereadbyanobserverorbyan(toda

5、ymostlyelectronic)instrument.Forexample,asshowninFig.7.1,amercury-in-glassthermometerconvertsthemeasuredtemperatureintoexpansionorcontractionofaliquidwhichcanbereadonacalibratedglasstube.Athermocoupleconvertstemperaturetoanoutputvoltagewhichcanbereadb

6、yavoltmeter.Foraccuracy,mostsensorsarecalibratedagainstknownstandards.7.1IntroductiontextSensorsareusedineverydayobjectssuchastouch-sensitiveelevatorbuttons(tactilesensor)andlampswhichdimorbrightenbytouchingthebase.Therearealsoinnumerableapplicationsf

7、orsensorsofwhichmostpeopleareneveraware.Applicationsincludecars,machines,aerospace,medicine,manufacturingandrobotics.AsshowninFig.7.2，asensorisadevicewhichreceivesandrespondstoasignal.Asensor’ssensitivityindicateshowmuchthesensor’soutputchangeswhenthe

8、measuredquantitychanges.Forinstance,ifthemercury7.1Introductiontextinathermometermoves1cmwhenthetemperaturechangesby1℃,thesensitivityis1cm/℃(itisbasicallytheslopeDy/Dxassumingalinearcharacteristic).Sensorsthatmeasureverysmallchangesmusthavever