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  • Features of error model construction of MEMS sensors for navigation task solution

    The paper describes the development and research of MEMS sensors error model using experimental data approximation of fourth degree polynomial with coefficients computed by least square method and written using of graphical programming language LabVIEW

    Keywords: Navigation, MEMS sensors, error model.

  • Criteria equality modal frequencies sensitive elements micromechanical gyroscopes-accelerometers

    Developed criteria for matching the oscillation frequencies of sensitive elements biaxial functionally integrated micromechanical gyroscopes-accelerometers LL-type. Review the results of modeling.

    Keywords: microsystm technology, element base, model, modeling, gyroscope, accelerometer, sensor

  • Long-term monitoring of human respiratory activity

    This article reviews systems of respiratory activity registration in relation to sports medicine. Attention is devoted to the use of miniature accelerometers that record the movement of the chest, as the optimal method for the diagnosis of the respiratory parameters. Other methods are based on piezo-resistive sensors, pressure and airflow sensors, and airways resistance sensors. The authors' developed device based on three-axis accelerometer is proposed. It recognizes episodes of apnea with sufficient accuracy for long-term monitoring. The algorithm of the accelerometer data processing is described. In order to minimize noise impact on the useful signal it is necessary to transform the three-dimensional cloud of accelerometer data into a flat sector. Then the relation of gravity vector deviation angle and the nominal position in time is determined. This presented device due to its ability to transmit data via Bluetooth technology, after appropriate software development for mobile phone and the receiving terminal of medical professional, will be able to organize a simple ergonomic long-term remote monitoring of respiratory activity.

    Keywords: systems of respiratory activity registration, long-term remote monitoring, three-axis accelerometer

  • The parametric method of determining a phase difference of quasi-harmonic signals

    The method of digital parametric measurement of the phase shift of signals with slowly varying amplitudes of the same slowly varying instantaneous frequencies was proposed. The numerical simulations and experiments on the developed hardware and software system were carried out. The error of measurement the phase difference of harmonic signals in the experiments were not more than  0,00001 radian. The method can be used in applications where the measured value is expressed in terms of the phase difference of quasi-harmonic signals.

    Keywords: quasi-harmonic signal, phase shift, real time measurements, hardware and software system

  • The method of functionally integrated laser-modulators design

    The proposed method of designing hardware components optical switching systems simplifies prototyping and development of systems of optical switching and multi-core VLSI. This method allows to automatically set parameters of the optical system at the design stage, depending on the requirements. This method may be cost-effective at the stage of technical specifications of the project, as will reduce the time required for its coordination between the customer and the design engineer.
    At the heart of developing a method of designing systems, optical switching elements is a comprehensive analysis of the equations and functions describing the electrical and optical properties of laser heterostructures, as well as electro-optic modulators and Fabry-Perrot resonators. Fundamental static and dynamic characteristics of semiconductor diode lasers can be calculated by using a set of kinetic equations describing the interaction of electrons, holes and photons in the active layer of the laser structure. At various stages of this method is processing, evaluation and calculation of the main characteristics of the elements of integrated optical switching systems.  

    Keywords: optical switching, integrated injection laser, quantum-scale heterostructure, amplitude modulation, terahertz range

  • Model of micromechanical mirrors mobile elements balance with internal suspension

    The model of micromechanical mirrors mobile elements balance is developed. The received results of modelling of a micromechanical mirror are considered. 

    Keywords: microsystm technology, element base, model, modeling, mirror

  • Investigation of the modes formation of the hybrid carbon nanostructures based on nanotubes for creation nanostructured materials

      The experimental studies of technological modes of formation of hybrid carbon nanostructures based on the nanotubes by multifunctional ultrahigh vacuum nanotechnological complex NANOFAB NTK-9 are performed. The parameters of the impact on hybrid nanostructures formation were found, established and studied experimental samples modified and Y-shaped hybrid carbon nanostructures . The results can be used as elements of nanoelectronics and nanosystem technology, composite fillings compounds and hydrogen storage.

    Keywords: Nanotechnology, carbon nanotubes, hybrid carbon nanostructures, nanostructured materials

  • Development of technology of receiving high-sensitivity gas sensors on the basis of zirconium oxide for hybrid sensor systems

      In this work the technology of receiving high-sensitivity gas sensors on the basis of zirconium oxide is developed for hybrid sensor systems. Laboratory samples of sensors of gas on the basis of zirconium oxide are made with use sol-gel method. Gas-sensitive characteristics of samples of sensors in relation to nitrogen dioxide are defined: limit of detection and factor of gas sensitivity. The received gas sensors will help to determine approach of an attack of bronchial asthma some hours prior to its beginning by level of an oxide of nitrogen in exhaled air of the person.

    Keywords: hybrid sensor systems, zirconium oxide, bronchial asthma, nitrogen dioxide

  • Modeling a micromechanical gyroscope-accelerometer LR-type

    The received results of modelling of a micromechanical sensor of angular speeds and linear accelerations are considered. 

    Keywords: microsystm technology, element base, modeling, sensor, gyroscope, accelerometer