一種高靈敏度金屬探測器的研究.pdf

1、哈爾濱理工大學碩士學位論文一種高靈敏度金屬探測器的研究姓名：王海魚申請學位級別：碩士專業(yè)：電工理論與新技術指導教師：趙洪20090301哈爾濱理T人學T學頌l：學位論義AHighSensitivityMetalDetectorAbatractTheapplicationofmetaldetectorsiSmoreandmorewidelyinmodemlifeTherewith，improvingandperfectingtotheir

2、functionshavedrawnmoreandmoreattentionofclientsThispapertookmetalimpuritymixedincableinsulativematerials(plasticsmallgrainofdiameter～4mm)asresearchobject，anddesignedametaldetectorusedoncablematerialconveyerbeltbasedonthe

3、propertiesofeddycurrentsensorBasedontheanalysisoftheinfluencingfactorsoneddycurrentsensorsensitivitythisdissertationproposedusingMnZnferriteasthematerialfordetectorscoresofmetaldetectorThispaperrespectivelysimulatedandco

4、mputedmagneticline，magneticinductionvalue，magneticflux，inductanceandimpuritylossofdetectingmagneticcoresofabigmagneticpole，unilateralarraymagneticpolesandsymmetryarraymagneticpolesbyfiniteelementanalysissoftANSYSThenanal

5、ysedtheadvantagesanddisadvantagesofallkindsofmagneticcores，designedthestructureofdetectingmagneticcores，anddeterminedthefrequencyofexcitingSOUrceIndetectingmagneticcoreofsinglebigmagneticpole，itisverylittlethattheeffecto

6、feddycurrenttoexcitingmagneticfield，andthedetectivesensitivityisverylow；Althoughdetectingmagneticcoresofunilateralarraymagneticpoleshasimprovedtheproblemsofdetectingmagneticcoreofsinglebigmagneticpole，buttheliftoffeffect

7、indetectionareaistooobvious，SOthesensitivityofdetectorswillbereduced；TheliftoffeffectmaybereducedalotwhenthesymmetryarraymagneticpolessystemisactedasdetectingcoreThroughanalysisandcomputionusingANSYSsoft，forthestudyprobl

8、em，wefoundthatwhenthespacingbetweendetectingpolesis3mm，themagneticinductionvaluesarealmostequalityonthesamehorizontallineindetectionarea；whentheexcitingfrequencyismorethan1MHz，theenergyconsumptionofmetaliron—impuritychan