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《远端串扰下永磁探测电路相位鉴频特性测量-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2014年9月控制工程Sep.2014第21卷第5期ControlEngineeringofChinaVo1.21,No.5文章编号:1671-7848(2014)0543731434远端串扰下永磁探测电路相位鉴频特性测量何颖子,方庆霞(毕节学院理学院,贵州毕节551700)摘要:压电式永磁探测电路广泛应用在远程目标探测系统中,其在远端串扰下的相位鉴频特性准确分析可提高探测系统的测量精度。传统方法采用红外和声脉冲等探测进行电路相位鉴频特性测量控制,在强磁场中曲线趋于饱和,测量性能不好。提出一种基于
2、引入正弦脉宽调制控制的端串扰下压电式永磁探测电路相位鉴频特性测量方法,并进行系统设计,首先进行压电式永磁探测电路系统设计,采用自适应噪声抵消方式处理远端串扰的干扰,设计远端串扰下压电式永磁探测电路,通过相位鉴频特性测量分析,实现电路的混频、倍频等频率变换,完成远端串扰下电式永磁电路的相位鉴频特性测量控制。系统测试结果表明,该测量方法和系统具有较好的远端串扰抵消性能,准确分析电路系统的相位鉴频特性,远程目标探测准确率提高,性能优越。为远程目标探测系统设计提供了硬件电路系统设计基础。关键词:电路;系统
3、;鉴频特性;探测中图分类号:TM571文献标志码:AFarEndCrosstalkUnderPermanentMagnetDetectionPhaseDiscriminatorCircuitCharacteristicMeasurementHE一Zi,FANGQing—Xia(CollegeofScience,BijieUniversity,Bijie551700,China)Abstract:Thepiezoelectrictypepermanentmagneticdetectioncircui
4、tiswidelyusedintheremotetargetdetectionsystem,atthefarendcrosstalkofphasefrequencycharacteristicofaccurateanalysiscalimprovethemeasurementaccuracyofthedetectionsystem.Tiletraditionalmethodusesinfraredandacousticpulsedetectionfor~equencycontrolcircuitf
5、ormeasuringphase,wheninthestrongmagneticfieldcurvetendstosaturation,themeasuringperformanceisnotgood.AnewFarterminalinterferencesinusoidalpulsewidthmodulationcontrolofpiezo—electrictypepermanentmagneticdetectioncircuitofphasemeasurementmethodispropose
6、dbasedonfrequencycharacteristics,andthesys—temisdesigned,thefirstpiezoelectrictypepermanentmagneticdetectioncircuitsystemdesign,theFarterminalinterferenceisfilteredusingtheadaptivenoisecancellationmethod,designtheFarterminalinterferencepiezoelectricty
7、pepermanentmagnetdetectioncircuit,throughmeasuringthephasefrequencycharacteristicanalysis,mixer,frequencydoublingfrequencytransformcircuitisobtained,thedetectionsystemiscompleted.Accordingtothetestresults.themeasuringmethodandsystemhasgoodfilteringper
8、formance.itcanaccurateanalyzethephasefrequencycharacteristicofcircuitsystem,improvetheaccuracyofremotetargetdetection,ithassuperiorperformance.Itprovidesthebasisforthedesignofthehardwarecircuitsystemofremotetargetdetectionsystem.Keywords:circu
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