1、廈門(mén)大學(xué)碩士學(xué)位論文基于汽車(chē)應(yīng)用的電容式觸摸開(kāi)關(guān)姓名：郭建寧申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：測(cè)試計(jì)量技術(shù)與儀器指導(dǎo)教師：陳文薌馮勇建20080520AbstractAbstractComparedwitholdmodelsmodemautomobilehasmuchmoreswithesandbuttonsNotonlyitsquantityisincreasinggreatlyitalsoneedtobeinstalledeasilyonth

2、econtrolpanelofautomobileInadditionitmusthavecostbenefitinordertotakeplaceofairproofswitchesOnepopularmethodistouseCapSensetechnologyCapSensechipintergrates4mainblocks：capacitivesensorinterface，relaxationoscillatorPWMand

3、counterCapacitivesensorteStStheexistenceofhumanfingerRelaxationoscillatorteststhecapacitancevariationofcapacitivesensorPWMandcountermeasuretheperiodofrelaxationoscillatoroutput，bywhichthecapacitancevariationofsensorCanbe

4、calculatedCounteroutputisconnected、析tllhostcomputerthroughserialports，transferthedataoffingerpositiontoallkindsofsystemcontrolfunctionTheprimaryworkinthisthesisislistedasfollow：1Consideringbonlcostandperformancedemand，we

5、selectcapacitivesensetechnologyRealizethelowcost，easyoperationandgoodenduranceofswitchs2TheworkprincipleanddesignofPWMisanalyzeddetaillyTheuseofA∑modulationmakesthecircuithavetheinvariableoperationfrequencyrn圮designoffol

6、dedoperationalamplifiers，highspeedcomparatornonoverlapcontrolclockandCMOSswithsmakesthePWMhavegoodsamplespeed，slewrateandaccuracy3Digitalfunctionblockisbuiltinthechip，realizingthedesignofmixsignalICItwillimplementtheharm

7、onychipandhostcomputerinteractionAccordingtothesimulationandtestresult，CapSencehasagoodlinearityandaccuracyfrom24Vto55Vand40“Cto120℃Thecostanddesigndifficuiltyismuchlowerwhichisabeneficialforboththemanufacturerandcustome