International Journal of Engineering and Manufacturing (IJEM)
IJEM Vol. 1, No. 6, 5 Dec. 2011
Cover page and Table of Contents: PDF (size: 128KB)
Supply Voltage Compensation of Hot Wire Flow Measurement Device
Full Text (PDF, 128KB), PP.52-56
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Author(s)
Wang Haitao
1,*
Lang Xiaohua
1
Yang Haiping
1
Li Ye
2
Yu Mengsun
2
Index Terms
Two step curve fitting, supply voltage compensation, hot wire, flow sensor
Abstract
Supply voltage compensation is important to keep the accuracy for hot wire/hot film gas flow sensors. A compensation experiment device is established, the two steps curve fitting is presented to determine the functional relations among flow、sensor output and supply voltage, the coefficient of fitting polynomial is determined by Least Square method, thus eliminating the influence of supply voltage variations. After compensation, the error is reduced to 2%. The algorithm is stabilized, easily to be fullfilled in microcontroller unit.
Cite This Paper
Wang Haitao,Lang Xiaohua,Yang Haiping,Li Ye,Yu Mengsun,"Supply Voltage Compensation of Hot Wire Flow Measurement Device", IJEM, vol.1, no.6, pp.52-56, 2011. DOI: 10.5815/ijem.2011.06.08
Reference
[1] Y.X. Su, J. Sheng, and G. W. Lang, "Flow measurement and testing," China Measurement Press,1992.(in Chinese)
[2] K.G.WU, "Frequency response of hot-film air mass flow sensors," Jouranl of Chang'an University,2005,25(5):pp.99-102.(in Chinese)
[3] J. P.Liu and G. L. Shi, "Hot wire mass flowmeter with an environment temperature compensation circuit," Chinese Journal of Sensors and Acurators,2006, 19(4):pp.1110-1116. (in Chinese)
[4] W. G.Zhao, Z.H.Song, and Z.W.Huang, "Thermal gas flow measurement based on single sensors," Chinese Journal of Sensors and Acurators,2009,22(3):pp.442-446. (in Chinese)
[5] X.J.Zhang, M.L.Zhang, and X.H.Li, "Temperature compensation of the CO electrochemical gas sensor based on RBF neural network," Chinese Journal of Sensors and Acurators, 2009,22(1):pp.11-14. (in Chinese)
[6] G.Y.L, Y.C.Sun,and G.F.Pan, "Information fussion of pressure sensor based on BP network," Chinese Journal of Science Instrument,2005,26(2):pp.168-171. (in Chinese)
[7] W.F.Liang, X.D.Wang, and P.E.Liang, "Pressure sensor temperature compensation based on least squares support vector machine," Chinese Journal of Science Instrument,2007,28(12):pp.2235-2238. (in Chinese)
[8] M.Gao, W.K.Lu, and R.T.Sun, "Temperature compensation of hall current sensor based on two-dimensional regression analysis," Journal of Electronic Measurement and Instrument, 2009,23(2):pp.100-104. (in Chinese)
[9] Q.Li, L.Liang, and ZH.Liu, "Intelligent pressure sensor system with temperature compensation," Chinese Journal of Science Instrument, 2008, 29(9):pp.1934-1938. (in Chinese)