MAIN TECHNOLOGICAL FEATURES OF THE FIBER-OPTIC FLUID FLOW VELOCITY SENSOR AND SENSOR’S ADJUSTMENTS 

Shachneva Elena Andreevna, applicant, Penza State University (40 Krasnay street, Penza, Russia); programmer, LLC "NORD-Pak" (7 Ryabova street, Penza, Russia), E-mail: e_shachnva@mail.ru 

681.7.068 

10.21685/2307-5538-2020-4-8 

Background. The means of measuring the speed of fuel on Board the aircraft subject to high demands on intrinsically-explosion-fire safety without harmful electromagnetic interference, ease of installation, accuracy and preservation of health in extreme conditions. Fiber-optic measuring instruments have proven themselves well for use in such conditions. Despite the obvious advantages over existing analogues, fiber-optic sensors are not widely used in the domestic market of communication equipment. In many ways, the main reason for this was the lack of sufficient information about the technological features of the procedure for adjusting and configuring fiber-optic sensors. This article discusses the features of such procedures and their effectiveness.
Materials and methods. To improve the metrological characteristics of the fiber-optic fluid flow velocity sensor, the technology of its alignment and the technology of precise positioning of the optical fiber relative to the radiation source and receiver have been developed.
Results. The main criteria and functions of adjustment of fiber-optic sensors of liquid flow velocity are determined. The main technical and metrological characteristics of fiberoptic liquid flow velocity sensors in severe operating conditions have been improved. Based on the obtained experimental data, the main technical characteristics of the sensor are formed.
Conclusions. The developed technology of alignment and positioning of the optical fiber relative to the source and receivers of the radiation of the fiber-optic fluid flow velocity sensor allows to increase the sensitivity of optical signal conversion by 1.5 times. If the alignment procedure is carried out correctly, the number of additional errors that affect the increase in the bends of the optical fiber is reduced. 

rocket and space technology, fiber-optic fluid flow velocity sensor, alignment, fiber-optic cable, metrological characteristics