基于ARM的光聲甲烷氣體檢測(cè)硬件系統(tǒng)設(shè)計(jì).pdf

1、西南科技大學(xué)碩士學(xué)位論文基于ARM的光聲甲烷氣體檢測(cè)硬件系統(tǒng)設(shè)計(jì)姓名：郭瀟申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：模式識(shí)別與智能系統(tǒng)指導(dǎo)教師：劉先勇201106西南科技大學(xué)碩士研究生學(xué)位論文第ll頁?！猒—————————————————————一AbstractWiththecommunity’Sincreasingattentiononthesafetyofcoalmi

2、ning，coalminegassensorsbecausetherestrictionontheworkingprinciple，shortcalibrationcycle，shortlifc，wastingalotofresourcesandmanpowerDevelopmentofnewcoalminegasmonitoringsystemhasgreatpracticalvaluePhotoacousticgasdetectio

3、ntechnologyinprinciplehasthecharacteristicsofhighsensitivity，longlife，calibrationfreeandmaintenancefree，isanidealwaytodetectgasAccordingtotheneedofgasdetection，andbasedonthesupportofSichuanCoalIndustryGrouptransverserese

4、archproject，PhotoaeousticSensingLaboratorydevelopgasdetectorbasedonphotoacoustiespectroscopyInthispaperbasedontheoriginalhardwareplatform，usestheARM9familychips3e2440asthecoreprocessingchip，designsall5panshardwareofcorep

5、rocessingmodule，lasercontrolmodule，weaksignaldetectionmodule，frequencytrackingmoduleandpowermoduleandPCBAfteralotofcircuitstestinganddataanalysis，forthemicrophone’Shighdynamicrange，raisemulti1evelenlargingmultipleadaptiv

6、eamplificationForslowresponsetimeofthecurrentfrequencytracking，raisethefrequencytrackingbasedonphasedifferenceVerifytherationlityofmaximumdatasamplingAfteranalyzingthetemperaturefeaturesofthehardwarecircuit，asimplemethod

7、oftemperatureaffectedsoftwarecorrectionhasbeengivenFinally，aperformancetestofthephotoacoustiegasdetectionhasbeengiven，andthecomparisonofthismethodandinfraredmethanesensordirectlyshowstheadvantageofphotoacousticmethanedet