FOXBORO福克斯波罗0303472-SF0620A412望眼欲穿，却蓦然回首，发现真正好的工控品牌都在---《厦门莫格电气自动化有限公司》国外直接采购，***行货，价格优惠，***保修，型号齐全，优势库存，欢迎来电查询！莫格电气做到信誉，信任，信服。一样的产品，不一样的是价格与服务。您的选择，就是我们的前进的动力。上述导波换能器中，PZT压电晶片具有体积小、重量轻、成本低的优点，适用于结构健康状态监测应用，因此目前各国研究团队主要使用PZT压电晶片作为导波激发和接收换能器。3.2导波激发波形优化超声导波具有频散特性，不同频率的波包成分的传播速度不同，成为频散现象。严重的频散现象会造成检测信号混淆、缺陷特征无法提取。为了避免此问题的发生，需要对导波激发频率和波形进行优化。超声导波激发波形通常使用经汉宁窗调制的5周期正弦波。汉宁窗的作用是降低由于波形忽然开始和忽然结束造成的频率旁瓣，使得能量集中于激发频率。通过对激发信号的加窗调制可以减小激发信号的频带宽度，减小频散效应。图4为200kHz正弦波和加窗调制后的波形，以及其对应的频谱。图45周期200kHz正弦波与加窗调制对比:(a)原始信号，(b)原始信号频谱，(c)汉宁窗调制信号，(d)调制信号频谱3.3超声导波检测平台超声导波检测方法不同于常规超声检测，它***突出的优点就是可以实现快速、大范围检测，而不是逐点检测，同时为较******缺陷，必须在试验中确保检测数据的精度。因此在构建检测平台上，针对超声导波的特殊性(如所选激励信号的特殊性，压电陶瓷换能器选取的特殊性等)，建立了超声导波检测平台，如图5所示。AppliedMaterials3300-05006AppliedMaterials/AMAT0010-17798-002M11-097-0949AppliedMaterials0140-08743001MUL-P1TRANSFERI/OCAAppliedMaterialsSST129SPINOLDCPA2XHOERBIGERORIGA/?AppliedMaterials25C-APPLIED-15RodlAppliedMaterials0021-17719REV.00512939900AppliedMaterials/AMAT0021-20788ECShield8"AppliedMaterials/AMAT0200-10073InsulatorQuartz200mAppliedMaterials0040-78341DUCT.2WAYFLOOREXHAUSTAppliedMaterials3300-01639FTGTBGUNTEE3X3/8T31AppliedMaterials3860-01029402244R-X2HeatExchangerAppliedMaterials0240-20300KITPNEUPERMFCORFINALAppliedMaterials/AMAT0200-00218QuarzPlateAppliedMaterials/AMAT0240-76735KITFLOORMOUNTGENAppliedMaterials0040-75904REVBK***-074-8032AppliedMaterials0680-01626CBMAGTHERM1P120/240V10AppliedMaterials0620-01164CABLEASSY332CG6"LG+2AppliedMaterials3300-04432FTGPIPCONN1/2TX1/2-1AppliedMaterials/AMAT0021-15657SHUTTERDISCMDP30AppliedMaterialsPLM201/CLEANER208VAC25AAppliedMaterialsDEUBLIN957-6000190-01272w/VEXTAFBAppliedMaterials0140-06465CableHARNESSASSYAMATKVAppliedMaterials/AMAT0200-02420DepRingAppliedMaterials0150-01027REV001RTRONCable2xAppliedMaterials3860-01003TBGMETAL3/8OD.35WALOTOF6AppliedMaterials3700-01474414122-P4MainfraAppliedMaterials/AMAT0200-00410ECGasdistributionPlAppliedMaterials0020-22453TOOLROBOTCLAMPASSYAppliedMaterials0620-00573CABLEAppliedMaterials0150-36345REV001CABLEAppliedMaterials0150-76760REV002RTRONCABLEAppliedMaterials0020-40412BLANKNON-ENPCERTERFINDERAppliedMaterialsFACTORYINTERFACEDIGITALI/O0190-22AppliedMaterials423960-P4Chamber20040-51790BRACKEAppliedMaterialsAMAT0020-26312Shieldupper8"DurasAppliedMaterials/AMAT0020-24018PinAntennaAppliedMaterials3320-01026J016R08-PJMainframCableAppliedMaterials0242-04262KITCRYOCOMPQDISCCUSTOMAppliedMaterials0020-53581ROLLINGSEAL300MMTITANPLOTOF2AppliedMaterials3320-01390GSKTSHLDRF.103AppliedMaterials0150-00406402244R-X2HeatExchangerAppliedMaterials0040-63584ADAPTERDNETLIGHTTOWER3AppliedMaterials0140-14385CableHARNASSYOPERINTFAppliedMaterials0270-76118ARMLEVELINGTOOLDBR4025AppliedMaterials/***C0040-0379550040-037920021-70415AppliedMaterials0020-28756REV002STUDCRYO/GATEVALAppliedMaterials0040-40833BUSBARPOWERSUPPLYCBLONOVELLUSSYSTEMSINTERFACEFE/LLC3VECTOR26-28396803AppliedMaterials3320-02241GSKT6"CFFOFHCCOPPER41AppliedMaterials0040-40834BUSBARPOWERSUPPLYLOADAppliedMaterials3690-02667413407-P4SCRMACHHEXHDAppliedMaterials0140-76014400432-DCChamberMiscCabAppliedMaterials0140-76016400432-DCChamberMiscCabAppliedMaterials3860-01160AME7873-01ShipalongMiscAppliedMaterials0150-20112MainframeCableEMOGENERAAppliedMaterials/AMAT0020-27123Pedestal8"SNNFAppliedMaterials0190-70106ENDURADOCULINKCDROMMANLOTOF2AppliedMaterialsBRGPILLOWBLOCK1"205SST3AppliedMaterials0190-102703M56039-6AppliedMaterials0040-40832BUSBARPOWERSUPPLYCBLO)