全光纤激光多普勒测振仪空气耦合振动检测  

Air coupled vibration detection of all-fiber laser Doppler vibrometer

作　　者：李斐斐[1,2] 吴谨[1] 赵志龙[1,2] 王东蕾[1] 叶征宇[3] 于彦明[3] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049 [3]中国北方电子设备研究所,北京100083

出　　处：《强激光与粒子束》2012年第11期2549-2554,共6页High Power Laser and Particle Beams

摘　　要：采用外差探测方式,建立了全光纤结构的激光多普勒测振仪,用来测量经空气传播耦合引起的散射体振动,以期感知振源振动信息。实验探索了散射体材料、固定方式和相对振源位置等对空气耦合振动的影响,得到了200～2700Hz频率范围内6种散射体振动响应特性曲线。结果表明:通过空气耦合引起的散射体振动,在相同振源振幅下,散射体振动的振幅一般随频率升高而升高;在材料、固定方式和相对振源位置等因素中,散射体材料对振动响应特性的影响是主要的,后两者只影响局部细节。Using optical heterodyne detection, an all-fiber laser Doppler vibrometer （LDV） was set up to investigate the air coupled vibration of scattering objects so as to recover the vibrating information of the source. Influence of the scattering object properties, such as materials, holdings, relative positions to the source, etc. , on the response to the source vibration through air coupling was investigated by the LDV and the vibration frequency response curves ranging from 200 Hz to 2700 Hz for six scatter- ing materials were obtained. Results show that in the case of air coupled vibration of scattering objects, the response vibration amplitude is generally bigger at higher frequency; and the vibration response curve is more affected by the material of the scattering object than by the holdings or relative positions of the scattering object.

关 键 词：激光技术 激光多普勒测振仪 振动响应 光学外差探测 

分 类 号：TN249[电子电信—物理电子学]