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1)  LDDM(Laser Doppler Displacement Measurement)
激光多普勒测量仪
2)  laser Doppler displacement meter
激光多普勒位移测量仪
1.
It is difficult to align and time-consuming to get squareness errors with conventional laser interferometer, described here is a new laser measurement technique based on a single-aperture laser Doppler displacement meter with a flat mirror.
提出利用单头激光多普勒位移测量仪及平面反射镜,通过测量机床的4条体对角线的位移误差实现对机床三轴间的垂直度误差测量。
3)  laser Doppler measurement
激光多普勒测量
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4)  laser Doppler velocimeter
激光多普勒测速仪;激光多普勒速度计
5)  laser Doppler anemometer
激光多普勒测速仪
1.
In a φ300 column,the flow fields of gas on rotating stream tray were investigated with DANTEC 55X laser doppler anemometer.
在φ３００ｍｍ塔内，实现了用二维激光多普勒测速仪对旋流板上气体速度场的测定，获得了不同高度剖面的切向、轴向及径向速度分布的数据，探明了板上气流场的基本特点；还采用气－固流模拟湿板操作，测定了模拟液滴的流场。
2.
The flow fields of gas and simulating droplet are investigated with the DANTEC 55X laser doppler anemometer on 300mm rotating stream tray (RST).
在直径300mm塔内,用激光多普勒测速仪对旋流塔板上的流场进行了实验研究,探明其主要特征,进一步证实了过去对不同用途板型的设计思想。
3.
The flow field in the tip region has been studied by laser Doppler anemometer (LDA) and flow visualization technique.
介绍了利用激光多普勒测速仪 ( LDA)和激光片光流场显示技术在一轴流风扇转子叶尖附近流场测量得到的结果。
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6)  laser doppler velocimeter
激光多普勒测速仪
1.
Aiming at the dynamic performance of frequency tracker designed specifically for laser Doppler velocimeter, the analysis was accomplished and some results of the experiments are presented.
针对激光多普勒测速仪常用信号处理设备———频率跟踪器 ,采用实验方法分析了其动态响应特性及影响因素 ,发现其动态响应参数并不能全面反映其在实际测试中的动态响应能力 ,实际测试中的动态响应能力明显低于通常的估计 。
2.
Based on the experimental data obtained from 3 D laser Doppler velocimeter to measure the flowfield of a coaxial rotor and a single rotor in hovering their axial, radial and circumferential velocity are comparared their characteristics and differences presented.
以三维激光多普勒测速仪测得的数据为基础，全面比较了共轴式双旋翼与单旋翼尾迹流场中轴向、径向和周向速度的特点与差异。
3.
In order to detect the hidden structures and the pattern of turbulence in fluid flow,the liquid velocity field was measured with 3D laser Doppler velocimeter(LDV) during the single bubble seriate rising process in non-Newtonian fluid,and wavelet method was adopted to analyze the time series of instantaneous velocity.
为了揭示流体流动中的隐含结构及湍流运动规律,利用三维激光多普勒测速仪对非牛顿流体中气泡上升过程液相速度场进行了测量,并借助小波方法对瞬时速度时间序列进行分析。
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补充资料：超声多普勒诊断仪


超声多普勒诊断仪


　　此为利用多普勒效应的原理对运动的脏器和血流进行探测的仪器。常用的超声多普勒诊断仪是由双片插头接受连续超声回声，转成电信号，经低频放大后作监听用；亦可外接示波器，供波型观察及摄影；接心电图记录仪，则可描记下信号的包络曲线。此外，还可用以探测胎动、胎盘杂音和脐带杂音。
　　
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条