3、进行了分析。关键词 方波脉冲;脉冲电场灭菌;液体食品;阻抗测量-III-哈尔滨理工大学学士学位论文MeasurementofimpedanceparametersofliquidfoodunderSquarewave pulse voltage AbstractInthefoodindustry,food sterilization isanimportant operatingunit.Non-heat sterilization technologyis a focus of food resear
4、chareas.High-voltage pulsedelectricfieldsterilization techniques is playing an increasinglyimportant role in the sterilization of liquidfoodbecauseof the sterilizationtimeisshort,highefficiencyandless energyconsumption.Commonlyused pulsewaveformaresquare
5、wave, single-exponentialdecay waveand Sasser.Squarewavepulseisthebestfrom the bactericidaleffect.Inthispaper,555timer,74LS14inverterandIR2110areusedtoproduceasquarewavepulsevoltagesource.Impedanceparameters measurement hasan important positioninmodernsci
6、entific research andproduction life.For liquid materials,the measuringelectrode shouldbe a good conductiveproperties,andtheelectrodesdonotinteractwiththesample.In addition, impedance measurements ontheliquid isverysensitiveto impurities, alsorequires the
7、 electrode shouldbe easytoinstall and takeapartandwash.Electrodeselectionisgoodorbadimpactgreatlyonthemeasurementresults.Thefirstchaptersummarizesthe technicalprogress of pulsedelectricfieldsterilization of liquidfoodathomeandabroad;Inthesecondchapter,pu
8、ttingforwardatechnical program of the voltagesourcedependingsquarewavepulse tomeasure the impedance parametersof the liquid in a squarewave pulse,andtheprogram conducteda simulationanalysis, designandproduction.Finally-III