3、liquidfoodunderSquarewave pulse voltage AbstractInthefoodindustry,food sterilization isanimportant operatingunit.Non-heat sterilization technologyis a focus of food researchareas.High-voltage pulsedelectricfieldsterilization techniques is playing an increasinglyimportant role in
4、the sterilization of liquidfoodbecauseof the sterilizationtimeisshort,highefficiencyandless energyconsumption.Commonlyused pulsewaveformaresquarewave, single-exponentialdecay waveand Sasser.Squarewavepulseisthebestfrom the bactericidaleffect.Inthispaper,555timer,74LS14inverterand
5、IR2110areusedtoproduceasquarewavepulsevoltagesource.Impedanceparameters measurement hasan important positioninmodernscientific research andproduction life.For liquid materials,the measuringelectrode shouldbe a good conductiveproperties,andtheelectrodesdonotinteractwiththesample.I
6、n addition, impedance measurements ontheliquid isverysensitiveto impurities, alsorequires the electrode shouldbe easytoinstall and takeapartandwash.Electrodeselectionisgoodorbadimpactgreatlyonthemeasurementresults.Thefirstchaptersummarizesthe technicalprogress of pulsedelectricfi
7、eldsterilization of liquidfoodathomeandabroad;Inthesecondchapter,puttingforwardatechnical program of the voltagesourcedependingsquarewavepulse tomeasure the impedance parametersof the liquid in a squarewave pulse,andtheprogram conducteda simulationanalysis, designandproduction.Fi
