Real-time predicting the thermal state of the electronic unit by analyzing trends in the built-in sensors readings

2019 ◽  
Author(s):  
E. Karepova ◽  
Yu. Shan’ko ◽  
V. Derevyanko ◽  
D. Nesterov
Keyword(s):  
Real Time ◽  
Thermal State ◽  
Electronic Unit

scholarly journals MODULE OF PROCESSING EXPERIMENTAL THERMAL CHARACTERISTICS OF MACHINE TOOLS IN REAL-TIME MODE USING HIGH ORDER DERIVATIVES

2019 ◽  
Vol 4 (5) ◽  
pp. 155-164
Author(s):  
В. Позевалкин ◽  
Vladimir Pozevalkin ◽  
И. Парфёнов ◽  
Igor' Parfenov ◽  
А. Поляков ◽  
...  
Keyword(s):  
Real Time ◽  
Machine Tools ◽  
Thermal State ◽  
Thermal Characteristics ◽  
High Order ◽  
Automated System ◽  
Software Module ◽  
Computer Data ◽  
Characteristic Points ◽  
High Level

The article presents processing module of experimental thermal characteristics of machine tools in real time using high order derivatives. It is developed in a high level programming language. This module is a part of automated system of tests and diagnostics of machines thermal state. The module is equipped with a graphical user interface; it works in real time, allows performing procedures for smoothing experimental thermal characteristics and determining their prognostic values. This allows building curves of speed, acceleration and sharpness of temperature change over the time. The developed software module implements a new algorithm based on the Horner’s method. The practice of developing algorithmic software shows that the chosen method is very convenient and effective for machine implementation, due to the absence of a division operation at each computational step. It is experimentally confirmed that the total costs of performing the calculations of high order derivatives of an arbitrary degree polynomial using the Horner’s method according to the described algorithm are acceptable for real-time calculations on a standard personal computer. Data temperature and temperature movements of the machine working bodies can be processed using the developed algorithms. In addition, this algorithm allows calculating the value of the approximating polynomial and simultaneously obtaining the values of all its derivatives at a given point. This allows to solve the problem of "shift in time by step" of the position of characteristic points.

The restoration of temperature distribution in a two-dimensional domain by a tomographic method by using the results of measurements for electric resistance of oriented conductors

2018 ◽  
Author(s):  
В.А. Деревянко ◽  
А.Ф. Латыпов
Keyword(s):  
Mathematical Model ◽  
Temperature Distribution ◽  
Real Time ◽  
Printed Circuit Board ◽  
Circuit Board ◽  
Two Dimensional ◽  
Electronic Unit ◽  
Resistance Thermometer ◽  
Printed Circuit ◽  
Radio Electronic

Рассмотрена возможность использования “термометра сопротивления” для измерения распределения температуры в двумерной области. Создана математическая модель датчика, сводящаяся к решению томографической задачи. Важной особенностью модели является то, что число уравнений в системе линейных алгебраических уравнений (СЛАУ) больше числа переменных. Это позволяет уменьшить ошибки в исходных данных. Создана программа для определения решения СЛАУ с плохо обусловленной матрицей, позволяющая обрабатывать результаты измерений в реальном масштабе времени. Выполнен тестовый расчет. При малом числе ракурсов измерений получена удовлетворительная точность восстановления температуры. Purpose. To ensure a long period of active lifetime of space vehicles, it is necessary to use effective methods and means to control physical processes leading to premature failure of on-board radio electronic equipment both at the stage of ground testing and during active operation of the spacecraft in space. Long-term testing experience for electronic equipment shows that monitoring compliance with necessary temperature conditions of onboard equipment plays the main role in ensuring reliability. Ideally, the thermal control should be performed for all elements of radio electronic units in real time. Method. The possibility of using a “two-dimensional resistance thermometer” for recording the thermal field of a printed circuit board of an electronic unit is considered. The principle of operation of the thermometer is based on the measurement of integral resistances of extended mutually intersecting conductors in a medium with inhomogeneous temperature distribution. The registration of the integral resistances of individual conductors is possible with the help of an automated measuring system by solving the tomographic problem aimed to obtain the temperature distribution on the surface of the printed circuit board. Result. The design of the “two-dimensional temperature sensor” is considered. The sensor is technologically compatible with the design of the printed circuit board of the radio electronic unit. A mathematical model of the sensor is developed. It is reduced to the solution of a tomographic problem. A program for solving a system of linear equations with an ill-conditioned matrix is developed that provides the real-time processing for measurement results. The test calculation is performed. A satisfactory accuracy of the temperature restoration is achieved. Conclusion. A “two-dimensional resistance thermometer” can be used to measure a two-dimensional temperature field for a printed circuit board of a radio electronic unit in real time. The mathematical model allows adapting the thermometer design to a specific radio electronic unit and selecting the required accuracy of the temperature field restoration.

scholarly journals Findings on Real-Time Location Tracking by Implanting Different Mechanisms

2020 ◽  
Vol 9 (4S2) ◽  
pp. 40-44
Keyword(s):  
Real Time ◽  
Communication Technology ◽  
Tracking System ◽  
Appropriate Technology ◽  
Advanced Technology ◽  
Location Tracking ◽  
Electronic Unit ◽  
Time Position ◽  
Tracking Device ◽  
Tracking Technology

Monitoring individuals or important things has never been simpler, thanks to advances in communication technology. A tracking device is an electronic unit intended to communicate its area, either in light of a sign or at set interims.Tracking devices can permit you to screen stock, find imperiled creatures, or help salvage laborers discover you in a crisis.So Real-time location tracking consistently takes on a vital job in the life of the person. Growth in advanced technology advancements such as 2 G, 3 G, 4 G, LoRa, and ZigBee has gained progressive changes in realtime location tracking. Technology only works when it reaches the user's every standard. This study explored the appropriate technology to track the real-time position amidst the technologies listed above.This paper proposed a model for real-time location tracking through a device that offers the ability to track the location in case of emergency. The tracking system involves the GSM-based GPRS activated unit that continuously transmits the moving object's GPS location to a mobile device that has activated the specified software and sends the SMS in an emergency to the registered mobile number.

scholarly journals A laboratory study of environment and voltage effects on the thermal state of resistive voltage divider

Vestnik IGEU ◽  
2019 ◽  
pp. 5-16
Author(s):  
E.E. Gotovkina ◽  
V.D. Lebedev ◽  
G.I. Parfenov ◽  
N.N. Smirnov ◽  
V.V. Tyutikov
Keyword(s):  
Real Time ◽  
Physical Simulation ◽  
Low Voltage ◽  
Thermal State ◽  
Thermal Conditions ◽  
Ambient Air ◽  
Electrical Equipment ◽  
Voltage Transformer ◽  
Electric Voltage ◽  
Diagnostics System

There are currently no thermal self-diagnostics systems of instrument transformers operating in real time, as opposed to power ones, and thermal inspections are often carried out according to a maintenance schedule, which affects the reliability of electrical equipment. Therefore, an important task is to create such systems for digital instrument combined current and voltage transformers based on resistive dividers, which determine temperature values at several points, including the most heated element. The aim of this study is to obtain experimental data on the thermal state of a resistive divider exposed to environmental factors and voltage for developing a self-diagnostics system. The results are obtained by physical simulation of thermal conditions of the transformer and its elements in high- and low-voltage climatic chambers. The effects of the following factors of critical importance have been simulated: electric voltage, insolation, temperature and speed of the ambient air. Data processing was performed using the methods of probability theory and mathematical statistics. The time needed for the thermodynamic system to move to a steady heat exchange mode, and also the temperatures on the lower resistors and on the surface of the voltage transformer insulation cover have been determined. It has been established that thermal conditions are more significantly affected by the simulated voltage than by insolation. The study has shown that even in the most severe emergency operating modes, heating in the lower resistor does not exceed the critical value. It has been found that the thermal state of the transformer is significantly influenced by the simulated factors including directional insolation, which is not taken into account in the existing methods of calculating the thermal state of the instrument electrical equipment. The reliability of the obtained results is ensured by the fact that the simulation took into account significant factors. The results of the experiment will be used to develop a thermal self-diagnostics system for the digital transformer, which will improve the reliability of operation of such instrument equipment by allowing the personnel’s to give a rapid response to real-time information about the transformer thermal state.

Luminescence thermometry using sprayed films of metal complexes

2022 ◽  
Author(s):  
Riccardo Marin ◽  
Natalie Catherine Millan ◽  
Laura Kelly ◽  
Nan Liu ◽  
Emille Martinazzo Rodrigues ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Real Time ◽  
Thermal State ◽  
Industrial Applications ◽  
Luminescence Thermometry

Monitoring the thermal state of surfaces in real-time and in a contactless fashion is pivotal in several industrial applications and whenever the temperature of a device determines its functionality. The...

Some Recent Results in Quiescent Prominence Spectrometry

1979 ◽  
Vol 44 ◽  
pp. 41-47
Author(s):  
Donald A. Landman
Keyword(s):  
Real Time ◽  
Computer System ◽  
Spectral Response ◽  
Absolute Intensity ◽  
Solar Observatory ◽  
Target Size ◽  
Small Target ◽  
Signal Averaging ◽  
Quiescent Prominence

This paper describes some recent results of our quiescent prominence spectrometry program at the Mees Solar Observatory on Haleakala. The observations were made with the 25 cm coronagraph/coudé spectrograph system using a silicon vidicon detector. This detector consists of 500 contiguous channels covering approximately 6 or 80 Å, depending on the grating used. The instrument is interfaced to the Observatory’s PDP 11/45 computer system, and has the important advantages of wide spectral response, linearity and signal-averaging with real-time display. Its principal drawback is the relatively small target size. For the present work, the aperture was about 3″ × 5″. Absolute intensity calibrations were made by measuring quiet regions near sun center.

Video real-time imaging of artificial membranes during freeze-drying by cryo-electron microscopy

1988 ◽  
Vol 46 ◽  
pp. 16-17
Author(s):  
Alan S. Rudolph ◽  
Ronald R. Price
Keyword(s):  
Real Time ◽  
Self Assembly ◽  
Freeze Drying ◽  
Video Capture ◽  
Drying Process ◽  
Artificial Membranes ◽  
The Past ◽  
Cryo Electron Microscopy ◽  
Spherical Structures ◽  
Capture Techniques

We have employed cryoelectron microscopy to visualize events that occur during the freeze-drying of artificial membranes by employing real time video capture techniques. Artificial membranes or liposomes which are spherical structures within internal aqueous space are stabilized by water which provides the driving force for spontaneous self-assembly of these structures. Previous assays of damage to these structures which are induced by freeze drying reveal that the two principal deleterious events that occur are 1) fusion of liposomes and 2) leakage of contents trapped within the liposome [1]. In the past the only way to access these events was to examine the liposomes following the dehydration event. This technique allows the event to be monitored in real time as the liposomes destabilize and as water is sublimed at cryo temperatures in the vacuum of the microscope. The method by which liposomes are compromised by freeze-drying are largely unknown. This technique has shown that cryo-protectants such as glycerol and carbohydrates are able to maintain liposomal structure throughout the drying process.

An Interactive Minicomputer Program for the Indexing and Simulation of Electron Diffraction Patterns

1976 ◽  
Vol 34 ◽  
pp. 542-543
Author(s):  
R.P. Goehner ◽  
W.T. Hatfield ◽  
Prakash Rao
Keyword(s):  
Electron Diffraction ◽  
Real Time ◽  
Pattern Analysis ◽  
Flow Diagram ◽  
Hard Copy ◽  
Time Analysis ◽  
Real Time Analysis ◽  
Transmission Electron ◽  
One Step ◽  
Diffraction Patterns

Computer programs are now available in various laboratories for the indexing and simulation of transmission electron diffraction patterns. Although these programs address themselves to the solution of various aspects of the indexing and simulation process, the ultimate goal is to perform real time diffraction pattern analysis directly off of the imaging screen of the transmission electron microscope. The program to be described in this paper represents one step prior to real time analysis. It involves the combination of two programs, described in an earlier paper(l), into a single program for use on an interactive basis with a minicomputer. In our case, the minicomputer is an INTERDATA 70 equipped with a Tektronix 4010-1 graphical display terminal and hard copy unit.A simplified flow diagram of the combined program, written in Fortran IV, is shown in Figure 1. It consists of two programs INDEX and TEDP which index and simulate electron diffraction patterns respectively. The user has the option of choosing either the indexing or simulating aspects of the combined program.

Microstructural investigation of surface roughness in MBE-grown AlAs

1995 ◽  
Vol 53 ◽  
pp. 454-455
Author(s):  
R. Rajesh ◽  
R. Droopad ◽  
C. H. Kuo ◽  
R. W. Carpenter ◽  
G. N. Maracas
Keyword(s):  
Thin Film ◽  
Real Time ◽  
Growth Control ◽  
Native Oxide ◽  
Effusion Cell ◽  
Surface Oxide Layer ◽  
Microstructural Investigation ◽  
Mbe Growth ◽  
Film Substrate ◽  
And Control

Knowledge of material pseudodielectric functions at MBE growth temperatures is essential for achieving in-situ, real time growth control. This allows us to accurately monitor and control thicknesses of the layers during growth. Undesired effusion cell temperature fluctuations during growth can thus be compensated for in real-time by spectroscopic ellipsometry. The accuracy in determining pseudodielectric functions is increased if one does not require applying a structure model to correct for the presence of an unknown surface layer such as a native oxide. Performing these measurements in an MBE reactor on as-grown material gives us this advantage. Thus, a simple three phase model (vacuum/thin film/substrate) can be used to obtain thin film data without uncertainties arising from a surface oxide layer of unknown composition and temperature dependence.In this study, we obtain the pseudodielectric functions of MBE-grown AlAs from growth temperature (650°C) to room temperature (30°C). The profile of the wavelength-dependent function from the ellipsometry data indicated a rough surface after growth of 0.5 μm of AlAs at a substrate temperature of 600°C, which is typical for MBE-growth of GaAs.

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