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《Chinese Journal of Sensors and Actuators》 2007-01
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Development and Experiment of Crosscorrelation-Based Virtual Dynamic Flowmeter

JIANG Wan-lu~(1*),SUN Hong-mei~2,NIU Hui-feng~1,WANG Yiqun~11.College of Mechanical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China;2.Mechatronic Department,Beijing Second Light Industrial School,Beijing 100176,China  
A new method for measuring dynamic flow is researched.An innovated method is put forward.The dynamic laminar flow is selected as the research object.Basing on the principle of pressure pulse containing the flow information,the transit time is gained by means of sampling and cross-correlation calculating pressure signals at two points away from distance L.Then the average flow can be obtained.This process gets on continuously according to a certain time step length.When time step length tends towards 0,the average flow will approximate to the instantaneous flow.The unloaded servo cylinder is used in the contrasting experiment.The accuracy and validity of cross-correlation method has been proved.The experiment results of cross-correlation method have been calibrated.
【Fund】: 国家自然科学基金资助项目(60374042)
【CateGory Index】: TH814
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