Жарияланымдар / Публикации

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  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    Development and Design of an Optical-Electronic System of Fiber-Optic Sensors Based on Inclined Fiber Bragg Gratings
    (2023-06-07)
    Aliya Kalizhanova
    ;
    Айнур Козбакова
    ;
    Waldemar Wójcik
    ;
    ;
    The object of research is an optical-electronic system for recording and processing signals from fiber-optic sensors. Due to the use of optical fibers as sensitive elements, there is no influence on the measurement result of electromagnetic fields, spurious electromagnetic radiation, channel crosstalk, there are no problems, electrical safety is significantly increased, there are no problems of arcing and sparking. A scheme of a receiving-transmitting module has been developed, which is additionally equipped with a preliminary protection and filtering system. Further, measuring tracks, microcontroller software and functional tests were ordered to determine the metrological properties of the proposed system.Signal integrity analysis is presented, which allows you to check whether the signals present in the device are correctly transmitted between their sources and receivers. The analysis of signal integrity is investigated, which is performed in two stages of the device design process. Modeling of the studied module in the specialized program Altium Designer. With the help of this program, potential problems were found, such as the occurrence of crosstalk between paths, the exact values of some elements, accurate analytical calculation. Learned an impedance analysis trace for a given connection's parameters, where the value affects the shape of the given path, its physical dimensions, distance from other paths, and other physical properties of the board. Optoelectronic system for recording and processing signals from fiber optic sensors based on Bragg fiber gratings resistant to electromagnetic interference and temperature, for use in modern systems for monitoring building structures, bridges, tunnels, dams, high-rise buildings, railways, oil platforms, buildings, pipelines.
    Цитирования (OpenAlex) 1
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    Mathematical Modeling to Optimize Sensor Performance for Enhanced Sensitivity and Measurement Accuracy in a Biogas Plant
    (2026-01-13) ;
    Айнур Козбакова
    ;
    ;
    Timur Merembayev
    ;
    Kuanyshbek Igibayev
    The paper states that biogas plants are of particular importance in the development of renewable energy sources, and their efficiency is largely determined by the accuracy and reliability of parameter measurements during the production process. Sensors that determine temperature, pressure, pH, humidity, methane (CH₄) and hydrogen sulfide (H₂S) concentrations, gas flow, and oxidation-reduction potential (ORP) form the basis of the monitoring system. However, during operation, they are affected by nonlinear dependence, noise, drift, and errors that reduce the reliability of measurements. To solve this problem, mathematical modeling and sensor optimization methods are proposed. The study proposes a mathematical model that describes the correlations between the physicochemical characteristics of the environment and the output signals of the sensors. Based on this model, an analysis of the sensitivity of the measurement channels was carried out, critical areas where accuracy is significantly reduced were identified, and methods for compensating for errors were proposed. To improve the reliability of the results, intelligent data processing was used, including artificial neural networks, which allow adaptive adjustment of output data and calibration in real-time monitoring mode. The proposed approach improves measurement accuracy and the stability of the sensor system to external influences, which is also of practical importance for monitoring and controlling biogas plants. A mathematical model was proposed that takes into account the physicochemical dependence on environmental parameters (temperature, pressure, pH, Ch₄ and H₂S concentrations, humidity, gas flow, and redox potential) and sensor response. Based on this, a sensitivity analysis of the measurements was performed to identify areas of maximum error. Intelligent data processing using artificial neural networks was used to compensate for systematic errors and sensor drifts, which allowed for real-time calibration and correction of sensor readings.
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    Development of an IoT System for Monitoring the Operation of a Biogas Plant
    (2025-07-04) ;
    Айнур Козбакова
    ;
    Kuanyshbek Igibayev
    ;
    It is well known that the quality of biogas directly affects its energy value and efficiency of use in power plants, as well as determines the profitability of production. However, it can be difficult to identify deviations in the quality of biogas at early stages, especially in industrial conditions, as this requires in-depth knowledge of the physico-chemical characteristics of the gas. As part of this project, an intelligent biogas quality management system was developed using Internet of Things technologies designed to monitor key parameters such as temperature, methane levels and gas humidity. The ESP32 microcontroller, programmed in C, was used as the control module, which collected data from sensors and transferred them to cloud storage. A web application has also been created that provides the user with the ability to remotely monitor and control the system in real time from any device connected to the Internet. Notifications and alarms could be transmitted via WhatsApp messenger. The system has demonstrated high efficiency in increasing the stability and productivity of biogas production.
    Цитирования (OpenAlex) 1
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    Modeling and Designing Subsystem of Fiber-Optic Sensors for Diagnostics and Control of Mechanical Structures Health in Differential System
    (2023-09-13)
    Aliya Kalizhanova
    ;
    ;
    Айнур Козбакова
    ;
    ;
    The article examines the modeling and design of a subsystem of fiber-optic sensors for the diagnosis and monitoring of the operability of mechanical structures in a differential system. In this study, the definition of the problem was developed by a mathematical model of the FBG using the transfer matrix method and using this method, a simulation model for the sensor was solved. The transfer matrix method makes it possible to assign spectral characteristics of optical components based on the theory of coupled modes and the matrix description of an electromagnetic wave passing through an optical fiber. The simulation is performed by solving the equations of coupled modes in MatLab (Simulink) using the transfer matrix method, which provides the basis for the relationship between the controlled modes. The method can take into account refractive index profiles of arbitrary shape and be implemented in a tool called MatLab (Simulink). As a result of the study, optimization was carried out, where light is shed on the effectiveness of the proposed scheme for analyzing deformation measurements, obtaining a linear response. It's inventory-friendly, fast, and open-source. The main contribution of the study is the developed simulation model of the subsystem for fiber Bragg sensors, which shows that the power of the side lobes is completely minimized in the Gaussian reflection spectra of FBG, and the results of MatLab (Simulink) are in excellent agreement with the results of the optical lattice. MatLab (Simulink) has a wide range of applications in modeling various optical fibers for various fields such as visualization, communication, material processing and remote sensing.
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    TESTING OF AN OPTOELECTRONIC SYSTEM OF DISTRIBUTED FIBER-OPTIC SENSORS FOR MONITORING AND DIAGNOSING THE STATE OF BUILDING STRUCTURES
    (Mukhametzhan Tynyshbayev ALT University, 2023-04-28)
    Aliya Kalizhanova
    ;
    Айнур Козбакова
    ;
    ; ;
    Shyngys Kenshimov
    This article discusses distributed systems of fiber-optic sensors based on Bragg fiber gratings for monitoring and diagnosing the state of building structures, which allow periodic measurements and monitoring of the state of engineering structures, assess trends in their technical condition and thereby facilitate the identification of possible threats. The paper presents the results of experimental tests of an optoelectronic system of distributed fiber-optic sensors based on fiber Bragg gratings. The distribution of deformations has been estimated. The results of the study show that shape changes can be reliably detected using all installation methods and fiber optic sensors before significant cracking occurs in the cement.
    Цитирования (OpenAlex) 1Цитирования (OpenCitations) 1
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    Research of a Fiber Sensor Based on Fiber Bragg Grating for Road Surface Monitoring
    (Multidisciplinary Digital Publishing Institute, 2023-05-31)
    Гулжан Кашаганова
    ;
    Айнур Козбакова
    ;
    ;
    Гани Сергазин
    ;
    Күлжан Тогжанова
    Road infrastructure is a key public asset because it benefits the social and economic development of any country. It plays an important role for the development of the industrial complex, the production sector and the road surfaces of transport roads should be of high quality, have a long service life. Road infrastructure, as well as all infrastructure, requires preservation, maintenance and repair. There are special requirements for the roadway that must be observed during construction or repair. This article is devoted to a detailed study of the use of fiber optics sensors (FOS) based on the fiber Bragg grating (FBG) for road surface monitoring. Such a fiber sensor consisting of a fiber Bragg grid and a pair of grids can offer the possibility of simultaneous measurement of deformation and temperature for monitoring the pavement. Temperature and deformation measurements were carried out by installing a sensor on the surface of a made asphalt sample. The built-in fiber sensor based on FBG provides important information about how the pavement structure can withstand the load, subsidence of soil, timely implement road safety and stability measures evaluate and predict the service life of the pavement. The results of the study showed that the synchronicity, repeatability and linearity of the characteristics of the fiber sensor are excellent. The difference between the experimental and theoretical results is about 7%. Thus, based on the results of the obtained data, the fiber sensor on the FBG can be used for monitoring, designing road surfaces and in general transport infrastructure.
    Цитирования (OpenAlex) 39Цитирования (OpenCitations) 22
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    RESEARCH AND ANALYSIS OF THE PROPERTIES OF COMPOSITE MATERIALS. DEFINITION AND CLASSIFICATION OF COMPOSITE MATERIALS
    (Mukhametzhan Tynyshbayev ALT University, 2023-10-19)
    Aliya Kalizhanova
    ;
    Айнур Козбакова
    ;
    Бахыт Ералиева
    ;
    ;
    Unlike conventional materials, composites have become a suitable form for a range of current applications in industry, hospital and sports. This is combined with their remarkable physical, thermal, galvanic and mechanical properties, as well as, in addition, their low weight and investment cost in the given cases. This review article attempts to provide a general concept of composite materials, definition and classification of composite materials, most commonly polymer matrix composites and metal matrix composites. Polypropylene polyurethane and aluminum alloy were selected as matrices for this extract given their attractive properties and their use in various applications. All kinds of research are devoted to a variety of building materials, material processing and various properties. The determination of mechanical data appears to be a significant iterative process in the development and design of composite materials and their components. With regard to the mechanical properties of composite materials, this article highlights some of the uncertainties and limitations that affect the evaluation of mechanical properties, ranging from material constituents, industrial process, test characteristics and environmental conditions.
    Цитирования (OpenAlex) 2Цитирования (OpenCitations) 2
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    Development of an Optoelectronic System for Recording and Processing Signals From Fiber-optic Sensors
    (2023-10-24)
    Aliya Kalizhanova
    ;
    Айнур Козбакова
    ;
    ;
    Natural disasters, in particular earthquakes, can damage bridges, tunnels, dams, high-rise buildings, railways, oil platforms, buildings, and pipelines with catastrophic humanitarian, social, economic, and environmental consequences. Thus, automatic assessment of damage to industrial and civil construction structures after an earthquake in real-time or on request is necessary for early emergency response, effective preparation of rescue plans, and mitigation of these catastrophic consequences. The article presents the use of a system of distributed fiber-optic sensors based on Bragg fiber arrays, which will allow periodic measurements and monitoring of the condition of structures, assessing trends in its technical condition and thereby facilitating the identification of possible threats. The given research presents assembling and testing optoelectronic systems to record and process signals from fiber-optic sensors. The main optoelectronic systems to record and process the signals from fiber-optic sensors are light source controllers and optical power detectors. There was an assembled controller diagram, which apart from the light source includes the current source for its adequate operation, as well as the systems necessary for stabilizing its working point. The scheme was modeled for specifying nominal and maximum operation criteria. Construction has been designed in a way, that the light source controller includes structures of the current regulation and stabilization SLED (super luminescent diode) and temperature stabilization. Apart from that, there was assembled the microsystem of the optical power detector additionally to the light detector, which includes the microsystems of intensification and filtration of the signal measured, processing analog data into digital form, and microcontroller, used for preliminary data analysis. Data of optoelectronic systems diagram to record and process the signals from fiber-optic sensors has high response speed, low noise level, and sufficient progress. type your abstract here.
  • Некоторые метрики заблокированы вашими 
    Тип записи:Публикация,
    ПОСТРОЕНИЕ МОДЕЛИ БРЭГГОВСКОЙ СТРУКТУРЫ С ПЕРЕМЕННЫМИ ТЕХНОЛОГИЧЕСКИМИ ПАРАМЕТРАМИ
    (Mukhametzhan Tynyshbayev ALT University, 2024-03-28)
    Aliya Kalizhanova
    ;
    Айнур Козбакова
    ;
    Бахыт Ералиева
    ;
    ;
    Построение модели брэгговской структуры с переменными технологическими параметрами остаётся актуальной задачей в современной науке и инжиниринге. Моделирование брэгговских структур с переменными параметрами может помочь в разработке новых материалов с уникальными свойствами, которые могут быть применены в различных областях, от оптики до электроники. В работе представлены результаты численных расчетов, направленных на построение спектров волоконных брэгговских решеток с различными структурными параметрами. Также представлен метод, используемый для разработки математических моделей изучаемых структур. Для этого использовалась система уравнений, сопряженных модов, которая решалась численно с использованием метода матрицы перехода TMM (Transfer Matrix Method). Результаты моделирования брэгговских структур могут быть использованы в различных технологических инновациях, в создании новых типов оптических устройств или в области фотоники.