Supply Voltage Compensation of Hot Wire Flow Measurement Device | Zendy

Haitao Wang | Zendy; Xiaohua Lang | Zendy; Haiping Yang | Zendy; Li Ye | Zendy; Mengsun Yu | Zendy

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Supply Voltage Compensation of Hot Wire Flow Measurement Device

Author(s) -

Haitao Wang,

Xiaohua Lang,

Haiping Yang,

Li Ye,

Mengsun Yu

Publication year - 2011

Publication title -

international journal of engineering and manufacturing

Language(s) - English

Resource type - Journals

eISSN - 2306-5982

pISSN - 2305-3631

DOI - 10.5815/ijem.2011.06.08

Subject(s) - compensation (psychology) , voltage , microcontroller , flow (mathematics) , polynomial , electrical engineering , voltage compensation , current (fluid) , control theory (sociology) , engineering , computer science , mechanics , mathematics , physics , psychology , psychoanalysis , mathematical analysis , control (management) , artificial intelligence

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.

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