Model development for physical processes in sensing device for CAD system of sonic anemometer

The current situation in mine anemometry is described, the present-day methods of air flow velocity measurement are compared and the mathematical models of a sensor for a sonic anemometer of APA-1 type (portable sonic anemometer) are reviewed. This sensor represents a cylindrical wave guide–air tube with piezoelectric ring transducers (sources and receivers of acoustic signals) embedded in the walls. The models of the anemometric channel and its components are analyzed for selecting the most appropriate approximation for CAD design for a sonic anemometer. The basic model of aero-acoustic interaction is selected to be the model of acoustic radio pulse propagation in an infinite cylindrical wave guide with rigid walls and with uniform flow. The solution of the wave equation of motion in fluid in motion is obtained in the form of the complex Fourier series. The properties of the piezoelectric transducers are included in the model using the approximation of an ideal band-pass filter with the present resonance frequency and pass bandwidth. The interface of the program developed for the model computation and test data processing is described. The test data are obtained using workable prototypes. The program provides the model of a signal on a receiving piezo transducer at arbitrary sizes of the sensor and ambient parameters, and allows evaluation of the ranges of the involved values for a transducer to be capable.

Buyanov S. I., Rumyantseva V. A. Model development for physical processes in sensing device for CAD system of sonic anemometer. MIAB. Mining Inf. Anal. Bull. 2021;(5):169178. [In Russ]. DOI: 10.25018/0236_1493_2021_5_0_169.

S.I. Buyanov, Senior Lecturer, National University of Science and Technology «MISiS», 119049, Moscow, Russia,
V.A. Rumyantseva, Cand. Sci. (Eng.), Assistant Professor, Bauman Moscow State Technical University, 105005, Moscow, Russia, e-mail: valar@bmstu.ru.

V.A. Rumyantseva, e-mail: valar@bmstu.ru.

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