نتایج جستجو برای: laser doppler velocimeter

تعداد نتایج: 224815  

2015
Yongzheng Li Hongfang Ma Qiwen Sun Haitao Zhang Weiyong Ying

Radial profiles of particle velocities were investigated in a 6.1m high methanol-to-olefins cold model experimental device using a TSI laser Doppler velocimeter. The effect of axial height on flow development was not obvious in fully developed region under the same operating condition. Superficial gas velocity and solid circulating rate had significant influence on particle velocity in the cent...

1997
James F. Meyers Hiroshi Komine

A new laser velocimetry technique, Doppler global velocimetry, is described. This technique is capable of simultaneously measuring in real time the three components of velocity of an entire particle field i l luminated by a laser l ight sheet . A prototype one-component velocimeter is described along with the signal processing electronics. The system was tested by measuring the velocity field f...

2016
Shuang Wu Dehui Wang Rong Xiang Junfeng Zhou Yangcheng Ma Huaqiao Gui Jianguo Liu Huanqin Wang Liang Lu Benli Yu

In this paper, a novel velocimeter based on laser self-mixing Doppler technology has been developed for speed measurement. The laser employed in our experiment is a distributed feedback (DFB) fiber laser, which is an all-fiber structure using only one Fiber Bragg Grating to realize optical feedback and wavelength selection. Self-mixing interference for optical velocity sensing is experimentally...

2010
Günther Philipp

In this article we present a novel optical sensor allowing simultaneous measurements of axial position and tangential velocity of moving solid state objects. An extended laser Doppler velocimeter setup is used where two interference fringe systems are superposed slightly tilted. The axial position of moving solid state surfaces is determined via a phase evaluation. The phase laser Doppler dista...

Journal: :Applied optics 1984
B E Truax F C Demarest G E Sommargren

An industrial laser Doppler velocimeter has been developed for accurately measuring the velocity and length of moving surfaces. The instrument's advanced optical and electronic design provides a large depth of field, high SNR, and large dynamic range making it very suitable to industrial process control applications.

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