Selection and research of two-factor model for conversion function of vortex sonic flowmeters
Keywords:
vortex sonic flowmeters, convertion functions, weighted least squares method, all-possible regressions methodAbstract
The paper presents a method of searching the two-factor mathematical model conversion functions of vortex sonic flowmeters based on the results of special tests. In the proposed model resulting flow depends on the frequency of vortex shedding behind bluff body and the temperature of the liquid. Model selection was done using the method of all possible regression, coefficients was calculation made based on the weighted least squares method.We propose a method for adapting a two-factor conversion functions for use in flowmeter series production. The results of the proposed functions usage are shown on the example data from the production of vortex sonic flowmeters.
References
Ghaoud, T. Modelling and tracking a vortex flow-meter signal / T. Ghaoud, D.W. Clarke // Flow Measurement and Instrumentation. – 2002. – No. 13. – P. 103–117.
On measurement uncertainty of a vortex flowmeter / J.J. Miau, C.F. Yeh, C.C. Hu, J.H. Chou // Flow Measurement and Instrumentation. – 2005. – No. 16. – P. 397–404.
Improvement of the HHT method and application in weak vortex signal detection / Dandan Zheng, Tao Zhang, Juan Xing, Jianqiang Mei // Measurement science and technology. – 2007. – No. 18 – P. 2769–2776.
De-ming, H. A Vortex Flowmeter Based on Multiprocessor Technique / Huang De-ming, Li Wen-jun, Zheng Yong-jun // International Conference on Networking and Information Technology. – 2010. – P. 322–325.
Volker, H. Comparison of pressure and ultrasound measurements in vortex flow meters / Hans Volker, Harald Windorferb // Measurement – 2003. – No. 33. – P. 121–133.
Кремлевский, П.П. Расходомеры и счетчики количества: справ. / П.П. Кремлевский. – Л.: Машиностроение, 1989. – 701 с.
Лапин, А.П. Выбор модели функции преобразования вихреакустических расходомеров / А.П. Лапин, А.М. Дружков // Вестник ЮУрГУ. Серия «Компьютерные технологии, управление, радиоэлектроника». – 2012. – Вып. 17. – № 35 (294). – С. 161–164.
Дрейпер, Н. Прикладной регрессионный анализ: в 2 ч. / Н. Дрейпер, Г. Смит. – М.: Финансы и статистика, 1986. – Ч. 2, кн. 2. – 351 с.
Лапин, А.П. Применение взвешенного метода наименьших квадратов при исследовании функции преобразования вихреакустических расходомеров / А.П. Лапин, А.М. Дружков // Вестник ЮУрГУ. Серия «Компьютерные технологии, управление, радиоэлектроника». – 2013. – Т. 12, № 2. – С. 109–113.
