scholarly journals Design a System for Multifunctional Reconfigurable Intelligent Sensors

2020 ◽  
Vol 9 (1) ◽  
pp. 12-20
Author(s):  
Ezekiel Oluwadamilare Akintona ◽  
Keyword(s):  
Rotation Speed ◽  
Experimental Studies ◽  
Electrical Signal ◽  
Time Parameter ◽  
Main Function ◽  
Measuring Systems ◽  
Intelligent Sensors ◽  
Vibration Rotation ◽  
Physical Quantities ◽  
Operation Characteristics

Experimental studies of some object or phenomenon testing of industrial products control of mechanisms or processes is inconceivable without measurements of physical quantities that characterize the state of the object. Therefore, the composition of any measuring, testing or control system as the most important components includes primary measuring transducers - sensors. The main function of the sensors is to convert the values of various physical quantities into electrical voltage. Strength time parameter of the electrical signal. In the list of tasks that need to be solved in the development and application of measuring systems, one of the most important is that it is necessary to measure not one, but different physical quantities for example, pressure, vibration, rotation speed, deformations, use different in principle of operation, characteristics and sensor design.

INFLUENCE OF TECHNOLOGICAL FACTORS ON THE EFFICIENCY OF REMOVAL OF SCALE FROM FLATS FOR HOLLOW BALLS

2021 ◽  
pp. 143-147
Author(s):  
А.В. Панфилова ◽  
А.В. Королев ◽  
О.П. Решетникова ◽  
Б.М. Изнаиров ◽  
А.Н. Васин
Keyword(s):  
Rotation Speed ◽  
Experimental Studies ◽  
Surface Cleaning ◽  
Point Of View ◽  
Design Parameters ◽  
Technological Factors ◽  
Proportional Relationship ◽  
Sheet Products ◽  
Process Factors ◽  
Rolled Surface

Рассматриваются результаты проведения экспериментальных исследований способа удаления окалины с поверхности стального листового проката. Предложен новый способ и устройство для очистки поверхности листового проката от окалины режущими пластинами, вращающимися вокруг оси, перемещающейся поступательно вдоль обрабатываемой поверхности. Пластины наклонены в направлении вектора вращения на угол до 10 градусов и упруго поджимаются к обрабатываемой поверхности. Это обеспечивает возможность в процессе очистки поверхности воспроизводить макронеровности листового проката. Приведены результаты экспериментальных исследований, построены математические и графические зависимости, описывающие влияние факторов процесса на эффективность очистки поверхности проката. Показано, что наиболее значимое влияние на параметр оптимизации оказывает сила воздействия инструмента на поверхность заготовки. Причем это влияние реализуется в прямо пропорциональной зависимости. Другие исследованные факторы, а именно: угол наклона пластины, скорость ее вращения и подача, оказывают значительно меньшее влияние на степень очистки проката. Эти исследования были необходимы с точки зрения определения конструктивных параметров силовых элементов как технологической оснастки, реализующей указанный способ, так и технологической установки в целом. План эксперимента был принят, исходя из реальных производственных возможностей индустриального партнера, и соответствовал классическим представлениям теории резания. Описанные результаты дают возможность планировать дальнейшие эксперименты по изучению направлений использования данного способа Here we consider the results of experimental studies of the method of removing scale from the surface of steel sheet products. We propose a new method and device for cleaning the surface of rolled sheets from scale by cutting plates rotating around an axis moving translationally along the treated surface. The plates are tilted in the direction of the rotation vector at an angle of up to 10 degrees and are elastically pressed to the treated surface. This makes it possible to reproduce the macro-dimensions of sheet metal during the surface cleaning process. We present the results of experimental studies. We constructed mathematical and graphical dependences describing the influence of process factors on the efficiency of cleaning the rolled surface. We show that the most significant influence on the optimization parameter is exerted by the force of the tool's impact on the surface of the workpiece. Moreover, this influence is realized in a directly proportional relationship. Other factors studied, namely the angle of inclination of the plate, its rotation speed and feed, have a much smaller impact on the degree of cleaning of rolled products. These studies were necessary from the point of view of determining the design parameters of the power elements of both the technological equipment implementing this method and the technological installation as a whole. We adopted the experimental plan based on the real production capabilities of the industrial partner and corresponded to the classical concepts of the cutting theory. The described results make it possible to plan further experiments to study the directions of using the method

scholarly journals The design of electric drives with electronic protection devices

2018 ◽  
Vol 226 ◽  
pp. 04012
Author(s):  
Boris D. Khastsaev ◽  
Larisa M. Dedegkaeva ◽  
Maksim P. Maslakov
Keyword(s):  
Physical Quantity ◽  
Linear Dependence ◽  
Electronic Device ◽  
Measuring Circuit ◽  
Structural Scheme ◽  
Electric Drives ◽  
Intelligent Sensors ◽  
Protection Devices ◽  
Physical Quantities ◽  
Improved Characteristics

The possibility of designing an electronic device for protection and diagnostics of electric drives with improved characteristics is considered. The technique and algorithm of design of similar devices, the structural scheme of the device constructed on their basis are offered. To improve the characteristics of the device of protection and diagnostics of electric drives in the work it is proposed to provide for the use of measuring transducers with linear dependencies of the output values on the controlled ones. The latter is possible as a result of the use of measuring circuits in measuring transducers with linearized dependencies of the output values on the input and the use of intelligent sensors. As a measuring circuit for the construction of measuring transducers is considered the measuring circuit of Kenigsberg, which is characterized by a linear dependence of the output active value of the passive measured (controlled physical quantities). At the same time, the intelligent sensors are additionally assigned the function of linearization of the output dependence of a «simple» sensor on the controlled physical quantity.

Effects of Labyrinth Fin Wear on Aerodynamic Performance of Turbine Stages: Part II — Mushrooming Damages

2019 ◽  
Author(s):  
Xinbo Dai ◽  
Xin Yan
Keyword(s):  
Experimental Studies ◽  
Axial Direction ◽  
Labyrinth Seal ◽  
Aerodynamic Performance ◽  
Leakage Rate ◽  
Secondary Flows ◽  
Main Function ◽  
Aerodynamic Loss ◽  
Solution Methods ◽  
Isentropic Efficiency

Abstract The main function of labyrinth seal is to control leakage flow in clearance that involves with rotating and stationary parts. Therefore, the effective of clearance gap in labyrinth seal is critical to sealing, heat transfer and vibration characteristics. However, due to the mechanical expansions, vibrations, thermal stress, misalignment of seal components in transient periods of startup, shutdown and hot restart, the stationary and rotating parts of the labyrinth seal are likely to contact each other, causing wear damages in labyrinth fin. Mushrooming damages are often occurred in the rubbing events when labyrinth fin is made of soft material compared with the opposite component. To investigate how mushrooming damage affects the leakage performance of labyrinth seal, many numerical and experimental studies have been carried out in last decades. However, little attention has been paid on the influence of labyrinth fin mushrooming on aerodynamic performance of turbine stages. In this study, using the RANS equations solution methods, the effect of labyrinth fin mushrooming on isentropic efficiency, leakage rates, outlet flow angles, reaction degrees, profile static pressure distributions and flow fields in turbine stages were investigated at three different mushrooming radii and three effective clearances. It shows the leakage rate is increased with increasing the mushroom radius and effective clearance. At the same effective clearance, as the mushrooming radius increases from 0.2mm to 0.4mm, the leakage rate is increased by about 0.19–0.32%, and the overall isentropic efficiency is decreased by 0.78%. At the same mushrooming radius, as the effective clearance increases from 1mm to 1.4mm, the leakage rate is increased by 0.21–0.31%, and the overall isentropic efficiency is decreased by 0.65%. As mushroom radius and effective clearance increase, the secondary flows near hub and shroud are intensified and developed along axial direction, causing pronounced aerodynamic loss in turbine stages.

ACCURACY OF MEASURING SYSTEMS BASED ON LASER MODULES

2020 ◽  
pp. 44-53 ◽  
Author(s):  
V. E. Makhov ◽  
A. V. Emelyanov ◽  
A. I. Potapov ◽  
V. M. Petrushenko
Keyword(s):  
High Precision ◽  
Experimental Studies ◽  
Adaptive Algorithms ◽  
Measuring Systems ◽  
Precision Measuring ◽  
Relative Coordinates ◽  
Laser Module ◽  
Absolute Coordinates ◽  
Preliminary Selection

Measuring systems using the design of laser module beams on the surface of the object under study are considered. A technique is proposed for experimental studies of the brightness structure of the study of laser modules for their subsequent testing. Adaptive algorithms for determining the type of module and distance have been developed for determining the coordinates of light marks on the surface of controlled products, ensuring the accuracy and reliability of the measurement. The need for high-precision measuring systems to carry out their preliminary selection and calibration of laser modules according to the proposed method, taking into account the range of design of light marks, is shown. It is shown in the work that the accuracy of determining the relative coordinates in the trajectory of the light marks of laser modules at a distance of 5 m for plain surfaces of the observed objects can be several times higher (0,2…0,3 mm) of the accuracy of determining their absolute coordinates (»1 mm).

scholarly journals Nanoscale Schottky diodes for studying the activity of aluminum nanoparticles in reaction with water

2021 ◽  
Vol 2094 (2) ◽  
pp. 022051
Author(s):  
I Nedrygailov ◽  
N I Chernova ◽  
I V Osliakova
Keyword(s):  
Reaction Rate ◽  
Schottky Diodes ◽  
Experimental Studies ◽  
Characteristic Size ◽  
Electrical Signal ◽  
Aluminum Surface ◽  
Aluminum Nanoparticles ◽  
Production And Consumption ◽  
Reaction With Water ◽  
Kinetics Of

Abstract Hydrogen is a promising fuel for energy storage, transportation, production and consumption. At the same time, hydrogen in its pure form is not found on Earth in large quantities and therefore it is necessary to develop a technology for its production. One of the promising technologies for hydrogen production is the reaction of aluminum nanoparticles with water. At the same time, experimental studies of the elementary mechanisms of this reaction are difficult due to the aggressive properties of a concentrated alkaline solution, which is used to activate the aluminum surface. Here we show that the kinetics of the aluminum-water reaction can be monitored in real time using a Schottky nanodiode sensor, provided that the characteristic size of the nanodiode electrodes does not exceed 10 nm. The investigated nanoparticles are applied to the sensor surface by means of nanofabrication. The charge generated in the aluminum nanoparticles as a result of the reaction creates an electrical signal that is proportional to the rate of the chemical process. This makes it possible to use this technology to study the activity even of small groups of nanoparticles, when the volume of released hydrogen is insufficient to measure the reaction rate.

scholarly journals Application of the Hurst index to evaluate the testing of information gathering system components

2019 ◽  
Vol 30 ◽  
pp. 04002
Author(s):  
Sergei Klevtsov
Keyword(s):  
Electrical Signal ◽  
Sensor Calibration ◽  
Measured Parameter ◽  
Hurst Index ◽  
Technical Object ◽  
Conversion Characteristic ◽  
Additional Processing ◽  
The Relationship ◽  
Physical Quantities

The performance of the technical object is determined based on the evaluation of its parameters. Sensors of physical quantities are used to collect data on the values of the parameters of the controlled object. The performance evaluation of an object depends on the accuracy of the parameter measurement. The measurement accuracy is determined by the sensor conversion characteristic. If the sensor calibration tests are performed correctly, the conversion characteristic will accurately reflect the relationship between the measured parameter and the output electrical signal. A method for assessing the quality of the conversion characteristics of the microprocessor sensor, which is based on the use of Hurst index. The sensor of slowly changing physical quantities is considered. Based on the results of several test cycles obtained at a fixed ambient temperature, a series similar to the time series is formed. The initial series is subjected to additional processing before evaluation. The Hurst exponent is determined for the obtained series. The value of the Hurst index determines the quality of the test results. The possibility of using fractality index to assess the quality of tests is also considered.

Recent Patents for Thermistor Temperature Sensor

2020 ◽  
Vol 13 ◽  
Author(s):  
Guangbin Yu ◽  
Mingxin Yu ◽  
Bing Dai
Keyword(s):  
Structural Design ◽  
Development Trend ◽  
Temperature Sensors ◽  
Electrical Signal ◽  
Advantages And Disadvantages ◽  
Intelligent Sensors ◽  
Technical Requirements ◽  
Temperature Signal ◽  
Thermistor Temperature ◽  
Application Fields

Background: The collection of temperature is very important in life. Thermistor temperature sensors are an important part of the temperature acquisition system. Thermistor temperature sensors can convert the temperature signal into an electrical signal for output. Due to the different application fields and technical requirements, the shape, function and structure of thermistor temperature sensors are very different. Objective: The purpose of this study is to summarize and analyze the advantages and disadvantages of various devices from a large number of documents and patents. Methods: In this paper, the patents and the latest research of thermistor temperature sensors are reviewed. Results: By summarizing the characteristics of a large number of thermistor temperature sensors and analyzing the problems, the development of thermistor temperature sensors are prospected. Conclusion: Thermistor temperature sensors are widely used. Therefore, it is necessary to carry out special structural design and technical research for thermistor temperature sensors in different application fields. At the same time, with the development of technology, intelligent sensors and multi-functional sensors are an inevitable development trend.

Problems of Terminology in the Field of Intelligent Sensors and Systems

2010 ◽  
Vol 437 ◽  
pp. 434-438 ◽  
Author(s):  
Roald E. Taymanov ◽  
Ksenia Sapozhnikova
Keyword(s):  
Artificial Intelligence ◽  
State Standard ◽  
Measuring Systems ◽  
Intelligent Sensor ◽  
Intelligent Sensors

Terms and definitions in the field of sensors and measuring systems with the elements of artificial intelligence are not well-established. Nowadays, in Russia a draft of state standard “Intelligent Sensors and Intelligent Measuring Systems. Basic Terms and Definitions” is being under development. In accordance with the draft of the standard, the paper deals both with definitions and grounds of a number of terms such as “adaptive sensor”, “metrological self-check of sensors”, “metrological diagnostic check”, “intelligent sensor”, etc.

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