scholarly journals SMART SHIELD PANEL AC VOLTMETER CELL

Author(s):  
B.A. Kromplyas ◽  
◽  
A.S. Levytskyi ◽  
Ie.O. Zaitsev ◽  
◽  
...  

In this paper smart shield panel electrical operating parameters meters of energy generating facilities functionality is analysis. The list of functions of measuring instruments supplemented, which allowed increasing their operational characteristics. Methods and results of realization of these functions given for the panel board intellectualized voltage meter of alternating current. The structural scheme of the developed panel board intellectualized meter is described and its main technical characteristics are given.A method of mobile calibration of the device is proposed, in which a calibration signal source with a separate fixed value is used, and the calibration process itself is controlled from the device keyboard. A modernized detailed and simplified calibration algorithm is present. Ref. 12, fig. 5, tabl. 2.

Sensor Review ◽  
2019 ◽  
Vol 39 (5) ◽  
pp. 665-669
Author(s):  
Igor S. Nadezhdin ◽  
Aleksey G. Goryunov ◽  
Yuri G. Svinolupov ◽  
Olga J. Zadorozhnaya

Purpose The purpose of this paper is to develop a digital hydrostatic pressure sensor with the required metrological and operational characteristics. The developed sensor is designed to control hydrostatic pressure in wells during various geophysical works and studies. Design/methodology/approach To obtain the required metrological and operational characteristics of the sensor, a method was developed and applied to reduce the measurement error based on the calibration algorithm and the sensor model. Findings By using the developed calibration algorithm and the mathematical model of the sensor, it was possible to compensate for the measurement errors of the hydrostatic pressure sensor. Originality/value In the course of this research, tests of the developed sensor were carried and the maximum/minimum of measurement result errors was determined.


2017 ◽  
pp. 43-47
Author(s):  
D. A. Bakin ◽  
S. .. Srinivasa Pai ◽  
D. S. Leontiev

Currently, metrology is an important element of any industry. Under these conditions, the accuracy of testing and calibration of measuring devices becomes critical. Due to the high accuracy of modern measuring instruments, human factor can play a significant negative role in the calibration process. Therefore, the use of modern tools, such as a data logger, can significantly improve the quality of the process, reducing staff functions to process control.


Author(s):  
S.D. Polischuk ◽  
Y.A. Stekolnikov ◽  
D.G. Churilov ◽  
N.Yu. Stekolnikova ◽  
I.S. Arapov

В процессе ремонта изношенных деталей сельскохозяйственных машин необходимо обеспечить требуемый комплекс физикомеханических и эксплуатационных характеристик восстановленных поверхностных слоев. Износ деталей можно значительно уменьшить, используя для восстановления геометрических размеров гальванические покрытия, легированные металлами или неметаллами. Такие покрытия имеют большую износостойкость, коррозионную стойкость и высокие антифрикционные свойства. В работе рассмотрено использование Ni и Cr в качестве легирующих добавок в железные покрытия для упрочнения поверхностных слоев изношенных деталей, т.к. они повышают прочностные характеристики покрытий из электроосажденного железа. Хром имеет низкий коэффициент трения в паре с контролем, высокую тепло и коррозионную стойкость, что позволяет прогнозировать повышение эксплуатационных свойств в условиях использования сельскохозяйственных машин (окружающей среды, абразивномеханического износа и т.п.). Использование асимметричного переменного тока позволяет повысить скорость осаждения, увеличить твердость железных покрытий с легирующими компонентами (Ni и Cr) и применить их для восстановления деталей с высокими износами, эксплуатируемыми в жестких условиях. На асимметричном переменном токе значительно повышается производительность, технологичность, экономичность технологического процесса восстановления деталей, в частности, гальваническими покрытиями. Покрытия FeNiCr оказались эффективными при повышении долговечности восстановленных лемехов почвообрабатывающих машин и самотечных зернопроводов, поскольку обладают более высокой абразивномеханической, коррозионной стойкостью в сравнении с серийными лемехами, упрочненными сормайтом, и зернопроводов, изготовленных из листовой стали.During the repair of worn parts of agricultural machines it is necessary to provide the required complex of physical, mechanical and operational characteristics of the restored surface layers. Wear parts can be significantly reduced, using to restore the geometric dimensions of the galvanic coating, alloyed metals or nonmetals. Such coatings have high wear resistance, corrosion resistance and high antifriction properties. The paper considers the use of Ni and Cr as alloying additives in iron coatings to strengthen the surface layers of worn parts, as they increase the strength characteristics of coatings of electrodeposited iron. Chromium has a low coefficient of friction in conjunction with the counterbody, high heat and corrosion resistance, which makes it possible to predict an increase in operational properties in the conditions of use of agricultural machines (the environment, abrasive and mechanical wear, etc.). The use of asymmetric alternating current can increase the deposition rate, increase the hardness of iron coatings with alloying components (Ni and Cr) and apply them to restore parts with high wear, operated in harsh conditions. The asymmetric alternating current significantly increases the productivity, processability, and costeffectiveness of the process of restoring parts, in particular, galvanic coatings. Coating FeNiCr was effective in increasing the longevity of the restored plowshares tillage machines and gravitational grain pipelines because they have a higher abrasivemechanical, corrosion resistance in comparison with the serial shares, reinforced sorbitol and grain pipelines made of sheet steel.


2021 ◽  
Vol 1 (2) ◽  
pp. 16-20
Author(s):  
S.A. Plotnikov ◽  
◽  
P.V. Gnevashev ◽  

Alternative motor fuel is a mixture of various hydrocarbons and their compounds. Motor fuel is based on naphthenic, paraffinic and aromatic hydrocarbons. The performance characteristics of the fuel depend on its composition. When developing methods for monitoring the characteristics of fuels, the main problem is their multicomponent nature, since each component contributes to the operational characteristics. The operational characteristics are: cetane number, sulfur content, water-soluble acids and alkalis, lower heat of combustion and some others. To determine them, the combustion of diesel fuel (DF) and the subsequent analysis of the combustion products are carried out. The disadvantage of the existing method is the fact that it is impossible to quickly control the fuel at the place of operation, at a tank farm, a gas station, a process pipe or a vehicle fuel tank. When designing analyzers and measuring instruments the correlation dependences, which link the value of the operational property of the fuel with its physicochemical characteristics, are used. Taking into account the use of various types of alternative fuels (AT) with a wide range of their operational properties, the problem of a quick and accurate preliminary assessment of these proper-ties arises. Along with diesel fuel, it is proposed to use similar physicochemical methods to assess the flammability of alternative fuels.


2020 ◽  
Vol 7 (2) ◽  
pp. 111
Author(s):  
Ernidawati Ernidawati ◽  
Dina Syaflita ◽  
Naila Fauza ◽  
Widodo Budi Kurniawan

 Experimental activities are closely related to measurement activities that require measuring instruments. Skills using measuring instruments affect learning outcomes of the experimental activities carried out. The purpose of this research was to determine the effect of the implementation of the training on the use of electrical measuring instruments on the performance evaluation of physics education students in the basic physics experiments 2 course. This type of research is survey research. The research population was all students of the Physics Education Study Program Universiti of Riau semester 2, who took the Basic Physics Experiment 2 course in 2017, 2018 and 2019. The number of classes was 6 classes and each year a random sample class was taken, so the research sample amounted 3 classes. For 2017 students taking part in the Basic Physics Experiment 2 course, were only given instructions on the use of measuring instruments when conducting experiments, where as in 2018 and 2019, students taking basic physics experiments 2 were provided with special training before conducting experiments. The data collection instrument used was from the results of a three-year student performance assessment sheet on the topic of multiloop and alternating current experiments. The data analysis technique used is descriptive analysis. The results showed that students who were equipped with training in the use of electric measuring instrument before the lecture begins of Basic Physics Experiment 2, gave better performance assessment results compared to students who were not equipped with training in using electric measuring instrument. Therefore, training in the use of measuring instruments before conducting an experiment is very important given the basic physics experiment 2 on the topic of multiloops and alternating current.


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