Flue gas velocity measuring technology based on optical scintillation

被引：0
|
作者：
Yang, Yang [1 ]
Zhang, Zhi-Rong [2 ]
Ni, Zhi-Bo [2 ]
机构：
[1] The 716th Institute of China Shipbuilding Industry Corporation, Lianyungang 222006, China
[2] Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
来源：
Guangdianzi Jiguang/Journal of Optoelectronics Laser | 2014年 / 25卷 / 04期
关键词：
An optical measuring technology and its data processing method for the discharge velocity measurement of industrial flue gas are introduced; using the optical scintillation signals caused by the random fluctuations of particulate concentration field. Under the influence of turbulence; the cross correlation of optical scintillation signals; which is based on the separate double optical path measuring system structure; is analyzed; and the theoretical expression of the correlation function is acquired. The single circular linked list is adopted as the data accessing structure to implement the signal data sliding in time domain; and it can satisfy the requirements of real time and average simultaneously. The value of the optical scintillation cross correlation is calculated by the fast Fourier transform (FFT). An implementation method of parallel one-dimensional FFT using advanced vector extensions (AVX) instructions is proposed; and the FFT calculating speed is doubled on the computing platform which is based on the Intel i7 CPU. Finally; the field test results show that the flow velocity measured by the proposed technique in this paper is consistent well with the value tested by Pitot tube. It verifies the effectivenesses of this optical measuring technology and its data processing method;
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页码：711 / 717
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