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1、时光荏苒，岁月如白驹过隙，不经意间，我们即将从多彩的大学毕业，完成一个从大学生到社会人的转变。四年的大学生涯，让我明白了许许多多的科学知识和人生哲理，以及数不尽的感悟和成长。然只有将所学的理论知识付诸于社会的实践，才能检验和实现理论自身的价值，也只有将理论付诸于实践才能使理论得以检验。同样，一个人的价值也是通过实践活动来实现的，也只有通过实践才能锻炼人的品质，彰显人的时代风貌。而毕业实习作为大学的最后一课，也是最后一刻，我倍加珍惜，从而可以较深层次的理解社会，以便为将来能更好的胜任工作打下坚实的基础。附录CLiquidLevelMe
2、asurementChemicalindustrywiththeprogressofscienceandtechnologygotrapiddevelopment,inordertomaketheequipmentsafeandreliableoperation,andcanbeutmosttoimproveproductquantityandquality,toeffectivelyoperateautomaticallyandprocessadjustment,realizethescientificmanagementfort
3、heenterprisetoprovidethenecessarymaterialandenergyofaccuratedata,mustbeinproductionintheprocessofpressure,flow,level,temperature,chemicalcompositionofvariousparameterssuchastimely,accuratemeasurement.Generallytheprocessofcontainers,tanks,towers,tankofliquidsurfaceposit
4、ionlevel,slotbucket,cans,andwarehouseChuFasolidblock,theaccumulationofparticles,powderheightandsurfacepositioniscalledamateriallevel;Twonotfluidboundarybetweentheheightandtheliquidandsolidseparationheightiscalledinterfaceposition,thepositionofassemblylevel,materialleve
5、l,liquidlevelinterface.Materiallevelmeasurementtocorrectlymeasurethecontainerstoragecapacityorquality,knowcontainerlevelofhighandlowandadjustatanytime,inthematerialleveltomaintaintherequiredheight.Materiallevelmeasurementinchemicalprocess,notonlyundernormaltemperature,
6、atmosphericpressureandordinarymedium,materiallevel,liquidlevelmeasurementoftheinterface,butalsooftenmeethightemperature,lowtemperature,highpressure,inflammableandexplosive(negativetemperature).Viscosityandfoam,boilingdielectricmateriallevelmeasurementproblems.Inorderto
7、adapttothecharacteristicsofchemicalobjects,tomeettherequirementsofthechemicalprocessmateriallevelmeasurement,therearemanymateriallevelmeasurementandinstrumentation.1.Ultrasonicliquidlevelmeterandradarmateriallevelmeter(1)ultrasonicliquidlevelmeterMateriallevelmeasureme
8、ntprocess,theultrasonicsignal,issuedbytheultrasonicprobe,theliquidorsolidmaterialsurfaceafterlaunchback,bythesamesens
