1、哈爾濱理工大學(xué)碩士學(xué)位論文一種高靈敏度金屬探測(cè)器的研究姓名：王海魚申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：電工理論與新技術(shù)指導(dǎo)教師：趙洪20090301哈爾濱理T人學(xué)T學(xué)頌l：學(xué)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