基于PDV技术的惯性滑块式振动位移传感器设计  

Design of Vibration Displacement Sensor with Inertial Sliding Block Based on PDV Technology

作　　者：彭映成[1] 郭弦[1] 陈荣[2] 邢园丁[1] 黎小毛[1] PENG Ying-cheng;GUO Xian;CHEN Rong;XING Yuan-ding;LI Xiao-mao(Northwest Institute of Nuclear Technology,Xi'an 710024,China;College of Science,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]西北核技术研究所,陕西西安710024 [2]国防科技大学理学院,湖南长沙410073

出　　处：《仪表技术与传感器》2019年第9期5-9,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金项目(11672328)

摘　　要：为了研究在爆炸冲击作用下,防护结构体防护作用的效果,需要测量其内部位移。基于光子多普勒测速(PDV)技术,设计了一种惯性滑块式水平位移传感器,PDV系统采用了长景深的测量探头,保证了较大的位移测量范围,传感器结构采用了一种极低摩擦系数的滑动套衬与光轴滑块,减小了位移测量误差。冲击实验的测量结果证明,该传感器测量范围达±2 cm,实现了较长时间的振动测量。To study the protective effect of protective structure under blast loading,inner displacement measurement of the structure was needed.A horizontal displacement sensor with inertial slide block was designed,which is based on photonic doppler velocimetry(PDV)technology.Probe with large depth of field was adopted in the PDV system,providing large displacement measuring range.Sliding sleeve and sliding block with extremely low friction coefficient was adopted in the sensor structure,which can decrease the displacement measurement error.It is proved from the measurement results of the impact experiment that the measurement range of the sensor is±2 cm.Vibration measurement with long time can be achieved.

关 键 词：光子多普勒测速 惯性滑块式水平位移传感器 相干 时频分析 模极大值法 

分 类 号：TH825[机械工程—仪器科学与技术]