Supply Voltage Compensation of Hot Wire Flow Measurement Device

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Wang Haitao 1,* Lang Xiaohua 1 Yang Haiping 1 Li Ye 2 Yu Mengsun 2

1. School of Control Science and Engineering Shandong University, Jinan, China

2. Aviation Medical Institution, Beijing, China

* Corresponding author.


Received: 15 Aug. 2011 / Revised: 15 Sep. 2011 / Accepted: 27 Oct. 2011 / Published: 5 Dec. 2011

Index Terms

Two step curve fitting, supply voltage compensation, hot wire, flow sensor


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„ÄĀsensor 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


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