KEYWORDS: Sensors, Fiber Bragg gratings, Temperature sensors, Fiber optics, Transformers, Temperature metrology, Control systems, Air temperature, Temperature control, Fiber optics sensors
In the course of work, a fiber optical system for the temperature of high-voltage busbars, conflicts and other loaded nodes of electrical networks was developed based on the control of fiber Bragg gratings. The system has a temperature determination error of ±1 °C and a resolution of 0.1 °C. Observed temperature changes for high voltage applications have also been considered and observed. The main advantage of the developed system is the ability to quickly use export-optical deliveries as an increase in the level of the system, which in turn is associated with a significant cost of one channel measurement and use per system deployment. In the course of study, the sensor part of the system was developed in the form of two temperature sensors, a sensor interrogation device and its software. Further, a number of experiments on detection of sensors calibration curves was carried out, studies of sensors were carried out for the occurrence of a breakdown between phases, trial operation was carried out at the operating object for selecting electrical networks for one month. The results of the studies show that the system can perform its functions in various operating conditions, the ways of developing the system functions were outlined, which consist in the number of measurements and the use of the system to control the wear of superconducting radiation on contact groups.
The paper presents the concept of liquid media level control systems based on the use of fiber-optic technologies, in particular, addressable fiber Bragg structures. The paper presents methods for the formation of address structures and the principles of retrieving and processing information. The use of addressable fiber Bragg structures makes it possible to abandon the elements of bulk optics in the interrogation scheme, which increases the operational reliability, and simplifies the identification of the sensor in their common array in the measuring system.
The article is about gas air stream modeling at a nozzle cross section of a turbomachine for steady and unsteady operating mode, the mathematical model is assigned, which describes acoustic processes in a turbomachine flow path and the ways of their improvement. The principles of aero-acoustic cartography complex systems creation are defined by means of acouto-electronic and they are accompanied by methods and means of gas dynamic stream parameter measurement in the flow path and at nozzle cross section of a turbomachine. The principles described make the control more informative and ease the algorithm creation for nondestructive method of rotor blade condition monitoring. Altogether it provides reliable data in conditions of gas air stream parametric and structural uncertainty both in controlled inside section of the flow path and in outlet section at a turbomachine cut. The tasks of monitoring point placement and the tasks of a field spatial distribution reconstruction are reviewed according to measurements in a discrete set of points separately. In complex approach the turbomachine acoustic field reconstruction is realized according to measurement data of optical fiber sensor outlet using the statistical approach only. The field reconstruction in 1D, 2D and 3D formats is presented as continuous functions of spatial coordinates according to measurements in a discrete set of points where a priori information about the field features is available.
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