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时间:2020-01-12
《复合式MEMS水听器的设计_王雁.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、第39卷第2期压电与声光Vol.39No.12017年4月PIEZOELECTRICS&ACOUSTOOPTICSApr.2017文章编号:1004-2474(2017)02-0243-05复合式MEMS水听器的设计王雁1,2,刘梦然1,2,张国军1,2(1.中北大学仪器科学与动态测试教育部重点实验室,山西太原030051;2.中北大学电子测试技术重点实验室,山西太原030051)摘要:针对微机电系统(MEMS)仿生矢量水听器工作频带窄,灵敏度低,且存在左、右舷模糊问题,设计了高灵敏宽频带复合式MEMS水听器。矢量部分选择4个不同纤毛长度的仿生矢量水
2、听器组成阵列,各结构间采用并联方式,工作频带拓宽到4800Hz,并分割出4个不同的频率段,在拓宽了频响带宽的同时保证了灵敏度。标量部分采用低频电容水声传感器进行优化设计,空腔注满硅油、振膜开设声学孔,提高振膜承压性的同时保证了良好的动态性能。后续对标量和矢量信息进行声能流联合算法处理,解决了左右舷模糊的难题。该文主要介绍了复合式MEMS水听器的工作原理,结合ANSYSworkbench进行了仿真验证。选用玻璃片及绝缘衬底上的硅(SOI)片键合的单片集成复合结构工艺设计,在玻璃上定义空腔及下电极,在SOI片上定义十字梁和振膜,整体结构一致性好,定位精度
3、高。关键词:频带;复合式微机电系统(MEMS)水听器;声能流联合算法;左右舷模糊;ANSYSworkbench;振膜中图分类号:TN55;TB565.2文献标识码:ATheDesignofCompositeMEMSHydrophone1,2,LIUMengran1,2,ZHANGGuojun1,2WANGYan(1.KeyLab.ofInstrumentationScienceandDynamicMeasurement1,MinistryofEducation,NorthUniversityofChina,Taiyuan030051,China;2.
4、KeyLab.ofScienceandTechnologyonElectronicTestandMeasurement,NorthUniversityofChina,Taiyuan030051,China)Abstract:Aimingatthedisadvantagesofnarrowfrequencyband,lowsensitivity,andambiguitybetweentheporthandandthestarboardexistinginmicro-electro-mechanicalsystem(MEMS)bionicvectorhy
5、drophone,acom-positeMEMShydrophonewasdesignedinthispaper.Anarrayconsistingof4bionicvectorhydrophonewithdiffer-entlengthofciliawasselectedasthevectorpart,ofwhichtheparallelmethodbetweenthestructureswasused.Theoperatingfrequencywasextendedto4800Hz,and4differentfrequencybandsweres
6、egmented,whilebroad-enedthefrequencybandwidthandthesensitivitywasensuredatthesametime.Thescalarpartusedthelowfre-quencycapacitancehydrophonesensorforthedesignoptimization.Thecavitywasfilledwithsiliconeoilandthea-cousticholeswereopenedinthediaphragm,whilethepressurecapacityofthe
7、diaphragmwasenhancedandgooddynamicperformancewasensuredatthesametime.Thescalarandvectorinformationwasprocessedthroughajointalgorithmofacousticenergyflux,thustheambiguitybetweentheporthandandthestarboardwaseffectivelyelimi-nated.TheworkingprincipleofcompositeMEMShydrophonewasint
8、roducedinthispaperandthesimulationveri-ficationwascarr
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