Title :
Vortex signal processing method based on flow momentum
Author :
Chen, Jie ; Li, Bin ; Dai, Guangyu
Author_Institution :
Dept. of Mech. Eng. & Autom., Shanghai Univ., Shanghai, China
Abstract :
The amplitude of vortex signal is proportional to the square of the flow rate. It is difficult to track the accurate flow signal from noises at low flow rate. A signal processing method based on flow momentum is introduced in this paper. A group of nonlinear filters with -40 dB/dec characteristics are designed to capture the slim vortex signal. This method is realized in combination with another simple comparator channel to process the signal over the whole dynamic range, which is tested to have high accuracy and fast response.
Keywords :
flow measurement; vortices; flow momentum; nonlinear filters; simple comparator channel; slim vortex signal; vortex signal processing; Adaptive signal processing; Band pass filters; Cutoff frequency; Dynamic range; Fluid flow; Fluid flow measurement; Low-frequency noise; Mechanical variables measurement; Signal processing; Vibrations; Vortex flowmeter; non-linear filter; signal processing;
Conference_Titel :
Electronic Measurement & Instruments, 2009. ICEMI '09. 9th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3863-1
Electronic_ISBN :
978-1-4244-3864-8
DOI :
10.1109/ICEMI.2009.5274046
