1)Laser velocimetry激光测速
1.A new technique of laserbeam diagnostics with the electronical image method is introduced and used to the laser velocimetry.并将其应用于激光测速的光束诊断和监控。
2.The error of laser velocimetry system for single beam is analyzed as vehicle\'s pitching and rolling,and a system based on Janus configuration which is composed of a couple of reference beam system is presented.分析了车辆颠簸摇摆时单光束测速系统的测量误差,提出了一种基于Janus配置的激光测速系统。
英文短句/例句
1.vector velocity laser velocimeter向量速度激光测速仪
2.confocal backscatter laser velocimeter共焦反向散射激光测速仪
3.An analysis of properties and error of impulse LD speedometer;脉冲式激光测速仪的性能及误差分析
4.Pulsed Laser Velocimeter System Based on TDC-GP2基于TDC-GP2的脉冲激光测速系统设计
5.Development and Applications of Laser Velocity Measuring System for Hypervelocity Particle超高速微小碎片激光测速系统研制及应用
6.The Design of Laser Screens for Velocity Measurement System with Photoelectric DC Compensation带光电直流补偿的激光测速靶系统设计
7.Research on Laser Velocity Measurement System Based on Correlation Measurement Technology;基于相关测量技术的激光测速系统研究
8.Application of Laser Doppler Velocimetric Technology in DCR多普勒激光测速技术在二次冷轧机组的应用
9.laser Doppler anemometry激光多普勒风速测量法
10.Research of the reference-beam laser Doppler velocimeter参考光束型激光多普勒测速仪的研究
11.Measuring the precision of laser Doppler velocimeter based on counting基于计数法测量激光多普勒测速仪的测速精度
12.Fast deformation velocity measurement using laser Doppler velocity interferometer应用激光多普勒速度干涉仪测量快速形变速度
13.backscatter laser Doppler velocimeter反向散射激光多普勒测速仪
14.Study on Laser Doppler Velocimeter Based on CO_2 Lasers;基于CO_2激光器的多普勒测速研究
15.Research on the Quick Measurement Technique of Fresh Milk Protein with the Method of Laser;激光鲜乳蛋白质快速测定技术的研究
16.Research on the Measurement of Burning Velocity by a Laser-doppler Anemometer (LDA)用激光多普勒流速仪测量燃烧速度的研究
17.On the supersonic impinging jet by Laser Doppler Velocimetry激光多普勒测速方法研究超声速冲击射流
18.The Realization of Fast Fourier Transform Based on FPGA in Laser Spectrum Detection;激光光谱探测中快速傅里叶变换的FPGA实现
相关短句/例句
laser velocimeter激光测速
1.As an advanced un-intrusive flow measurement technology, the laser velocimeters have been widely employed to investigate the internal flow fields in Turbomachinery, in particular for the rotating flow fields. 激光测速作为一种先进的非接触式测量技术,在叶轮机械的研究中得到了越来越多的应用和发展。
3)LDA激光测速
1.Based on Doppler Frequency-Shift Effect,three typical techniques as LDA,PDPA,PIV are reviewed and their applications in measuring flow fields in stirred vessels with one or multistage impellers are summarized.介绍了激光测速技术基本原理 ,比较分析LDA、PDPA、PIV 3种代表性激光测速技术的技术进展和应用范围 ,针对它们在化工搅拌流场测量应用进行了综述 ,并介绍了激光测速技术在搅拌系统计算流体力学(CFD)模拟中的应用。
4)Laser doppler velocimetry激光测速
5)Laser Speed Measurement激光测速
1.This paper puts forward a new method for laser speed measurement with half polarity correlation.提出了一种激光测速的新方法——半极性相关法，它既具有极性相关法中数字信号便于延迟的优点，又保留了经典相关法中不丢失幅度信息的长处。
6)laser speedometer激光测速仪
1.Laser speedometer is the pivotal equipment in the process of setting up stream AGC control system,but the principle of laser speedometer based on double velocity of light and double scattering doppler technology has never been reported.介绍了基于双光速-双散射多谱勒技术的激光测速仪工作原理,对该类非接触式直接测量线速度的仪表进行了数学解析,并在与其他测速仪比较的基础上,对激光测速仪应用对象、仪表扫描周期和采样周期与滤波的关系、测量精度主要影响因素、安装及日常使用等实际问题提出了解决办法。
2.Existing calibration methods of laser speedometer are summed up and one new calibration method and instrument with simulant target is put forward in this paper.综述了激光测速仪的现有校准方法,提出了采用模拟目标进行激光测速仪校准的新方法,并根据该原理研建了校准装置。
延伸阅读
半导体激光泵浦的激光晶体半导体激光泵浦的激光晶体LD pumped laser crystal 半导体激光泵浦的激光晶体LD PumPed lasercrystal适用于半导体二极管作泵浦源的激光晶体。传统的固体激光器一般用闪光灯泵浦，由于闪光灯的发光区域宽，只有一部分能量被吸收后转换成激光，大部分转换成热量，使工作物质温度上升，恶化了输出激光束的质量。半导体激光器输出的激光谱线窄(一般为几纳米)，选择合适的半导体激光器，使其激光光谱与某种固体激光材料的吸收光谱匹配，即可达到高效泵浦，大大减轻固体工作物质的热负荷。 因为半导体激光器光泵区域小，需用的晶体尺寸也小，因此要求基质晶体内可掺入的激活离子浓度要高，且不产生浓度碎灭。此外，要求与光泵的半导体激光波长相匹配的晶体的吸收带要宽，吸收系数要大;要有低的阑值功率;Q开关运转时，荧光寿命要长。当泵浦光源从闪光灯改变为半导体激光二极管时，对被泵浦的激光晶体产生了不同的要求。用闪光灯泵浦时，对材料的热性能和机械性能有严格要求，而半导体泵浦则更注重材料的光谱性能。 在已使用的激光晶体中，掺钱石榴石(Nd:YAG)晶体的阑值功率低，光学质量高，是应用于半导体激光光泵的固体激光器的主要材料。由于Nd3+离子在基质晶体中受分凝系数的限制，Nd3+离子浓度不能太高，所以一些氟化物和钨、钥酸盐晶体等掺杂浓度高，激光效率高，荧光寿命长，有可能成为半导体激光泵浦的后选晶体。 用半导体泵浦可制成效率高、功率和频率稳定、激光束质量好、寿命长的全固化激光器，并经各种频率转换技术，可发展成各种波长、各种模式、各种运转方式的激光器，这种激光器将在很大范围内取代已有的各类固体、液体和气体激光器。 (沈鸿元)
