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Abstract

A simple resistance-based method was used to study the epoxy-carbon composite material. Measurement of changes of the resistance between contacts, located on the composite specimens, allows detecting the damage process in quasi-static and fatigue tests. The method can be useful to determine the margin of safety of composite elements.

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Authors and Affiliations

Paweł Pyrzanowski
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Abstract

The wide variety of electrode shapes and their arrangement relative to each other, as well as the possibility of corona discharge in the ambient air, have created prerequisites for the development of a number of new methods and corona discharge transducers designed to measure microwire parameters and linear dimensions of various objects. The principally new noncontact control method is based on the dependence of the corona discharge current value on the diameter of the corona wire placed inside the discharge chamber. This paper provides an overview of this method.
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Bibliography

[1] Sh.A.Bahtaev, A.A.Bokanova, G.V.Bochkareva, G.K.Sydykova. Fizika i tehnika koronnorazrjadnyh priborov. Almaty 2007.
[2] Sh.A.Bahtaev, G.K.Sydykova, A.Zh. Tojgozhinova, K.Kodzhabergenova. Koronnyj razrjad na mikrojelektrodah. Almaty 2017 – 78p.
[3] Sh.A.Bakhtaev, G.V Bochkareva., G.D.Musapirova, “The pulsed current mode of the negative corona,” Vestnik Kaz NTU, no. 3, pp. 212-217, 2010.
[4] T. Abiru, F. Mitsugi, T. Ikegami, K. Ebihara, S.-ichi Aoqui, K. Nagahama, “Environmental application of electrical discharge for ozone treatment of soil,” Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, vol. 5, no. 4, pp. 42-44, 2015, https://doi.org/10.5604 /20830157.1176573.
[5] Z. Lv, S. Rowland, S.Chen, H. Zheng, K.Wu, “Modelling of partial discharge characteristics in electrical tree channels: Estimating the PD inception and extinction voltages,” IEEE Transactions on Dielectrics and Electrical Insulation, no. 25, pp. 1999-2010, 2018. doi: 10.1109/TDEI.2018.007175.
[6] M. Szadkowski, “New method of analysis of partial discharges,” Przegląd Elektrotechniczny, vol. 90 no. 3, 103-106, 2014. doi: 10.12915/pe.2014.03.21
[7] Sh.A. Bahtaev, G.V.Bochkarjova, G.I. Bokova, “Sposob kontrolja diametra mikroprovoloki,” Republic of Kazakhstan Patent no. 5070, Ofic.bjull., Prom.sobstv., no. 10, 1998.
[8] Sh.A.Bahtaev, G.D. Musapirova et al., “Ustrojstvo dlja izmerenija diametra mikroprovoloki,” Republic of Kazakhstan Patent no. 96543, Ofic.bjull., Prom.sobstv., no. 2, 30.01.2017.
[9] Predpatent RK №12038.Sposob izmerenija skorosti protjazhki mikroprovoloki // Bahtaev Sh.A. i dr.Opubl. Bjull.№9, 16.09.2002.
[10] G.V.Bochkareva, G.D.Musapirova, “The frequency characteristics of the differential conductivity of the corona in the high-frequency region,” in proc. The main problems of modern science: international materials. scientific-practical conf. - Bulgaria, pp. 92-94, 2010.
[11] Sh.A.Bakhtaev, G.V.Bochkareva, G.D. Musapirova, “Areas of existence of anomalies in the high-frequency conductivity of the positive corona,” Tomsk State University Journal. AIPP no. 2, pp. 18-23, 2010.

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Authors and Affiliations

Aliya S. Tergeussizova
1
Shabden A. Bakhtaev
2
Waldemar Wójcik
3
Bekmurza H. Aitchanov
4
Gulzada D. Mussapirova
2
Aynur Zh. Toygozhinova
5

  1. Kazakh National University named after al-Farabi, Almaty, Kazakhstan
  2. Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
  3. Lublin University of Technology, Lublin
  4. Suleyman Demirel University, Almaty, Kazakhstan
  5. Kazakh Academy of Transport and Communications named after M.Tynyshpayev, Almaty, Kazakhstan
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Abstract

The paper presents a simple method of measuring the luminous flux value dedicated to LED light sources. This method uses information about a spatial radiation pattern of the lighting source under test and the results of illuminance measurements at the axis of this source. The method is described and the results of the measurements obtained using this method and the classical method are compared and discussed. Tests have been carried out for LED modules of different geometries. The measurement error of the considered method is analysed.
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Authors and Affiliations

Krzysztof Górecki
1
ORCID: ORCID
Aleksandra Kalinowska
2
Przemysław Ptak
1
ORCID: ORCID

  1. Department of Marine Electronics, Gdynia Maritime University, ul. Morska 81-87, 81-225 Gdynia, Poland
  2. Faculty of Electrical Engineering, Gdynia Maritime University, ul. Morska 81-87, 81-225 Gdynia, Poland
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Abstract

This paper presents a method of using a sensor with uniform Bragg grating with appropriately generated zone chirp. The presented method can be used for measuring two physical quantities, namely strain and temperature. By providing the same temperature sensitivity and different sensitivity to strain of two parts of a sensor, and experimental measurement of qualities of the proposed system and its calibration (experimental determination of sensitivity), verification of the results obtained from laboratory tests and the possibility of its practical implementation has been confirmed. The sensor grating was placed in such a way that its half was in the zone of a variable value of axial strain caused by changes of the cross-section of the sample. The other half, however, was in the zone of a constant cross-section of the sample and of constant value of strain, caused by the force stretching the sample. The obtained errors of non-linearity of processing characteristics for measuring strain and temperature of the proposed system were 2.7% and 1.5% respectively, while coefficients of sensitivity to strain and temperature were 0.77 x 10-6 m/e and 4.13 x 10-12 m/K respectively. The maximum differences between the values obtained from the indirect measurement and the set values were 110 μe for strain and 3.8°C for temperature, for a strain of 2500 μe and a temperature of 40°C.

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Authors and Affiliations

Piotr Kisała
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Abstract

This article shows that the most sensitive indicator of local and regional karst activity in territories of apparent karst processes is the behaviour of karst lakes. The authors propose a hydrogeological monitoring methodology for the karst pro-cess based on the phase-measuring geoelectric control method in the coastal zone of karst lakes. The geoelectric current control of hydrogeological changes in the medium at local levels uses a multi-frequency vertical electric sounding com-bined with a phase-measuring method of registering the geoelectric signal. These proven methods permit to distinguish var-iations of spatial parameters and the electric conductivity of several layers at a time. Moreover, they significantly increase the noise resistance and sensitivity of the measuring system. An adaptive algorithm function of the measuring complex for geoelectric monitoring of karst lakes’ coastal zones was developed to control the operation of facilities and data collection systems. Based on an example of a lake where karst processes are active, the key zones of hydrogeological control were identified depending on karst manifestations. The research confirmed the possibility of local and regional monitoring of the development and forecasting of destructive karst-suffosion processes based on hydrogeological regime observations of karst lakes.
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Bibliography

ANGEL M.L., JOHNSTON S., O’STEEN K., BROWN C., SANDO T. 2015. Groundwater control issues in transportation engineering: A short review of dewatering methods and lessons learned. Journal of Engineering Science & Technology Review. Vol. 8(3) p. 8–13.
ANIKEEV A., ANISIMOVA N., KOZHEVNIKOVA I., KOZLYAKOVA I. 2015. Assessment of karst-suffosion hazard along the routes of designed metro lines in Moscow. In: Engineering geology for society and territory. Vol. 5. Eds. G. Lollino, A. Manconi, F. Guzzetti, M. Culshaw, P. Bobrowsky, F. Luino. Springer International Publishing, Cham p. 913–917. DOI 10.1007/ 978-3-319-09048-1_177.
BOHACHENKO L.D. 2012. Preparation and implementation of monitoring Geological and hydrogeological conditions during construction and operation multifunctional complex. Dnipropetrovsk University bulletin. Geology, Geography. Vol. 20(3/2) p. 77–81.
BONACCI O., JURAČIĆ M. 2010. Sustainability of the karst environment-Dinnaric karst and other karst regions. Geologia Croatica. Vol. 63(2) p. 127–127.
BYKOV A.A., KUZICHKIN R.O. 2014. Regression prediction algorithm of suffusion processes development during geoelectric monitoring. Advances in Environmental Biology. Vol. 8(5) p. 1404–1409.
BYKOV A., KUZICHKIN O., DOROFEEV N., KOSKIN A. 2017. Information-hardware support of systems of the automated electromagnetic monitoring of geodynamic objects. December 2017 Procedia Computer Science. Vol. 103 p. 253–259. DOI 10.1016/j.procs.2017.01.098.
CHEN H.-J., CHEN C.-C., OUILLON G., SORNETTE D. 2017. Using geoelectric field skewness and kurtosis to forecast the 2016/2/6, ML 6.6 Meinong, Taiwan Earthquake. Terrestrial, Atmospheric and Oceanic Sciences. Vol. 28(5) p. 745–761.
DOLOGLOU E. 2011. Possible interrelation between the lead time of precursory seismic electric signals (SES) and geodynamics in Aegean Sea. Natural Hazards and Earth System Sciences. Vol. 11(6) p. 1599–1603. DOI 10.5194/nhess-11-1599-2011.
DONG B., DANSKIN D.W., PIRJOLA R.J., BOTELER D.H., WANG Z.Z. 2013. Evaluating the applicability of the finite element method for modelling of geoelectric fields. Annales Geophysicae. Vol. 31 p. 1689–1698. DOI 10.5194/angeo-31-1689-2013
DOROFEEV N., KUZICHKIN O., EREMENKO V. 2016. The method of selection of key objects and the construction of forecast function of the destructive geodynamic processes. International Multidisciplinary Scientific GeoConference: SGEM 1 p. 883–890.
EPURE L., BORDA D.R. 2014. Groundwater contamination and the relationship between water chemistry and biotic components in a karst system (Bihor Mountains, Romania). Travaux de lInstitut de Spéologie Emil Racovita. Vol. 53 p. 69–84.
GOLDSCHEIDER N., DREW D. (eds.) 2014. Methods in karst hydrogeology. IAH: International Contributions to Hydrogeology. No. 26. CRC Press. ISBN 9780367388980 pp. 264.
GRBIĆ M., SALAMON D., PAVLOVIĆ A. 2013. Interpretation of the results of geoelectric sounding based on a mathematical model of double-layered soil. Zbornik radova, Elektrotehnički institut “Nikola Tesla”. Vol. (23) p. 189–198.
GRECHENEVA A.V., DOROFEEV N.V., KUZICHKIN O.R., EREMENKO V.T. 2016. Organization of geodynamic monitoring on the basis of the geoelectric method. In: GeoBaikal. Conference Proceedings. European Association of Geoscientists & Engineers p. 1–5. DOI 10.3997/2214-4609.201601691.
HAMDAN H., KRITIKAKIS G., ANDRONIKIDIS N., ECONOMOU N., MANOUTSOGLOU E., VAFIDIS A. 2010. Integrated geophysical methods for imaging saline karst aquifers: A case study of Stylos, Chania, Greece. Journal of the Balkan Geophysical Society. Vol. 13 (1) p. 1–8.
IRAWAN D., GRANDIS H., SUMINTADIREDJA P. 2015. Quasi-2D resistivity model from inversion of vertical electrical sounding (VES) data using guided random search algorithm. Journal of Mathematical and Fundamental Sciences. Vol. 47 (3) p. 269–280. DOI 10.5614/j.math.fund.sci.2015.47.3.5.
KAZEEV A., POSTOEV G. 2017. Landslide investigations in Russia and the former USSR. Natural Hazards. Vol. 88(1) p. 81–101.
KHOMENKO V.P., ALESHINA L.A. 2008. Estimation of sinkhole danger at a one-building’s site in Moscow, Russia. In: Sinkholes and the engineering and environmental impacts of karst. 11th Multidisciplinary Conference on Sinkholes p. 269–277. DOI 10.1061/41003(327)26.
KOLYUSHKO D.G., RUDENKO S.S. 2017. Prohrama dlya interpretatsiyi rezul'tativ vertykal'noho elektrychnoho zonduvan¬nya «VEZ-4A» [A computer program for interpretation of the data of vertical electrical sounding VEZ-4a]. Elektrotekhnika i elektromekhanika. No. 3 p. 63–66. DOI 10.20998/2074-272X.2017.3.09.
KUZMIN Y.O. 2015. Recent geodynamics of fault zones: Faulting in real time scale. Geodynamics & Tectonophysics. Vol. 5 (2) p. 401–443.
LA VIGNA F. 2016. Idrogeologia e protezione civile, cosa dovrebbe voler dire “rischio idrogeologico” [Groundwater and civil protection, what the Italian for “hydrogeological risk” should mean]. Acque Sotterranee – Italian Journal of Groundwater. Vol. 5(4) p. 55–57. DOI 10.7343/as-2016-242.
LARSEN P. 2003. Scientific accounts of a vanishing lake: Janez Valvasor. Lake Cerknica and the new philosophy [online]. [Access 03.06.2020]. Available at: https://pavellarsen.files.wordpress.com/2012/11/u-cerknica.pdf
MILANOVIĆ P.T. 2000. Geological engineering in karst: Dams, reservoirs, grouting, groundwater protection, water tapping, tunneling. Belgrade. Zebra. ISBN 867489125X pp. 347.
MOLEK H. 2003. Engineering-geological and geomechanical analysis for the fracture origin of sinkholes in the realm of a high velocity railway line. In: Sinkholes and the engineering and environmental impacts of karst. 11th Multidisciplinary Conference on Sinkholes p. 551–558.
OLADUNJOYE M., JEKAYINFA S. 2015. Efficacy of Hummel (modified Schlumberger) arrays of vertical electrical sounding in groundwater exploration: Case study of parts of Ibadan Metropolis, Southwestern Nigeria. International Journal of Geophysics. Art. ID 612303. DOI 10.1155/2015/ 612303.
OLAWUYI A.K., ABOLARIN S.B. 2013. Evaluation of vertical electrical sounding method for groundwater development in basement complex terrain of west-central Nigeria. Nigerian Journal of Technological Development. Vol. 10(2) p. 22–28.
RAVBAR N., GOLDSCHEIDER N. 2009. Comparative application of four methods of groundwater vulnerability mapping in a Slovene karst catchment. Hydrogeology Journal. Vol. 17(3) p. 725–733. DOI 10.1007/978-3-642-12486-0_51.
ROMANOV R.V., KUZICHKIN O.R., TSAPLEV A.V. 2015. Geoecological control of the aquifer in the decentralized water supply systems of the local level. 8th International Conference on Intelligent Data Acquisition and Advanced Computing Systems: Technology and Applications (IDAACS). Piscataway Township. IEEE p. 42–46. DOI 10.1109/IDAACS.2015.7340698.
SANTOSA L.W. 2007. The investigation of groundwater potential by Vertical Electrical Sounding (VES) approach in Arguni Bay Region, Kaimana Regency, West Papua. Forum Geografi. Vol. 21. No. 1 p. 43–56. DOI 10.23917/forgeo. v21i1.1820.
SCAIONI M., FENG T., BARAZZETTI L., PREVITALI M., LU P., QIAO G., WU H., CHEN W., TONG X., WANG W., LI R. 2015. Some applications of 2-D and 3-D photogrammetry during laboratory experiments for hydrogeological risk assessment. Geomatics, Natural Hazards and Risk. Vol. 6 (5–7) p. 473–496. DOI: 10.1080/19475705.2014.885090.
SHARAPOV R.V., KUZICHKIN O.R. 2014. Geodynamic monitoring in area of nuclear power plant. Applied Mechanics and Materials. Vol. 492 p. 556–560.
SOBEIH M.M., EL-ARABI N.E., ESAM EL DEEN Y.H., AWAD B.S. 2017. Management of water resources to control groundwater levels in the southern area of the western Nile delta, Egypt. Water Science. Vol. 31 (2) p. 137–150.
SOKOLOV S.Y., ABRAMOVA A.S., MOROZ E.A., ZARAISKAYA Y.A. 2017. Amplitudes of disjunctive dislocations in the knipovich ridge flanks (northern Atlantic) as an indicator of modern regional geodynamics. Geodynamics & Tectono-physics. Vol. 8(4) p. 769–789.
ŠOLAR S., SHIELDS D., LANGER W., ANCIAUX P. 2007. Trajnostni razvoj in mineralne surovine za gradbeništvo: izbrana (evropska) vprašanja in primeri prakse [Sustainability and aggregates: selected (European) issues and cases]. RMZ-Materials and Geoenvironment. Vol. 54(3) p. 345–359. DOI 10.1016/j.jeca.2014.10.002.
SOMARATNE N. 2015. Karst aquifer recharge: A case history of over simplification from the Uley South basin, South Australia. Water. Vol. 7(2) p. 464–479.
SONG T., LIU Y., WANG Y. 2017. Finite element method for modeling 3D resistivity sounding on anisotropic geoelectric media. Mathematical Problems in Engineering. Art. ID 8027616. DOI 10.1155/2017/8027616. SZYDLARSKI M., MODRZYŃSKI J., STOPIŃSKI M., MAJEWSKI M., MARAS K. 2017. Comparing natural regeneration of Norway spruce Picea abies (L.) Karst. in the Kaszuby Lake District and in the other regions of northern Poland. Leśne Prace Badawcze / Forest Research Papers. Vol. 78(4) p. 303–314. DOI 10.1515/frp-2017-0034.
WANG X., ZHANG G., XU Y.J. 2016. Groundwater and surface water availability via a joint simulation with a double control of water quantity and ecologically ideal shallow groundwater depth: a case study on the Sanjiang Plain, northeast China. Water. Vol. 8(9), 396 pp. 23. DOI 10.3390/w8090396.

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Authors and Affiliations

Oleg R. Kuzichkin
1
ORCID: ORCID
Roman V. Romanov
2
ORCID: ORCID
Nikolay V. Dorofeev
2
ORCID: ORCID
Gleb S. Vasilyev
1
ORCID: ORCID
Anastasia V. Grecheneva
1
ORCID: ORCID

  1. Belgorod National Research University, 85 Pobedy St., 308015 Belgorod, Russia
  2. Vladimir State University, Vladimir, Russia
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Abstract

On the basis of a unipolar corona discharge, a method of non-contact and continuous measurement of linear parameters of thin and ultra-thin dielectric fibres and optical fibres (10 to 125 microns) in the process of their manufacture was developed. The measurement method differs from the commonly known methods by high accuracy and reliability of measurement and resistance to changes in the electrical characteristics of the discharge gap and the state of ambient air.
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Authors and Affiliations

Aliya S. Tergeussizova
1
Shabden A. Bakhtaev
2
Waldemar Wojcik
3
Ryszard Romaniuk
4
Bekmurza H. Aitchanov
5
Gulzada D. Mussapirova
2
Aynur Zh. Toygozhinova
6

  1. Kazakh National University named after al-Farabi, Almaty, Kazakhstan
  2. Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
  3. Lublin Technical University, Poland
  4. Warsaw University of Technology, Poland
  5. Suleyman Demirel University, Almaty, Kazakhstan
  6. Kazakh Academy of Transport and Communications named after M.Tynyshpayev, Almaty, Kazakhstan
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Abstract

Quality evaluation is very important for haptic rendering. In this paper, an objective evaluation method for a haptic rendering system based on haptic perception features is proposed. In the method, the haptic rendering process is compared to the real world perception process in a simple standardized procedure based on feature extraction and data analysis. A complete evaluation process for a simple haptic rendering task of pressing a virtual spring is presented as an example to explain the method in detail. Compared with the traditional objective method based on error statistics, the method is more concerned about the consistency of human subjective feelings rather than physical parameters, which makes the evaluation process more consistent with the haptic perception mechanism. The results of comparative analysis show that the method presented in this paper is simple, gives reliable results reflecting the consistency with subjective feeling and has a better discrimination ability for different kinds of devices and algorithms compared with the traditional evaluation methods.

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Authors and Affiliations

Zhiyu Shao
Juan Wu
Qiangqiang Ouyang
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Abstract

The aim of this paper is to compare three different methods of analysis of results of lightning impulse breakdown voltage measurements of solid materials such as insulating pressboard. These three methods are the series method, the step method and the up-and-down method which are applied to withstand voltage estimation commonly in high voltage engineering. To obtain the data needed for the analysis a series of experimental studies was carried out. It included studies of mineral oil and natural ester impregnating 1 mm of thick cellulose-based pressboard. In order to show the distribution of breakdown voltage the Weibull distribution was additionally applied in data analysis. The results were also assessed from the viewpoint of dielectric liquid used for impregnation. The studies carried out showed that series and step methods give comparable results opposite to the up-and-down method. The latest overstates the results for mineral oil impregnated pressboard and understates for natural ester impregnated pressboard when juxtaposing them with the rest of the methods applied. In addition, there is lack of possibility to assess the withstand voltage for the up-and-down method directly from the vector of random variable. It is possible only as a result of a specially developed equation which always arouses doubt. From the methods applied it seems that the step method can be a great substitution for the series method as intuitive, fast in application and limiting the number of samples in solid insulation material testing.
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Bibliography

[1] Liu, Q.,Wang, Z. D., & Perrot, F. (2009). Impulse breakdown voltages of ester-based transformer oils determined by using different test methods. IEEE Conference on Electrical Insulation and Dielectric Phenomena, 608–612. https://doi.org/10.1109/CEIDP.2009.5377741
[2] Rozga, P. (2016). Streamer propagation in a non-uniform electric field under lightning impulse in short gaps insulated with natural ester and mineral oil. Bulletin of the Polish Academy of Sciences: Technical Science, 64(1), 171–179. https://doi.org/10.1515/bpasts-2016-0019
[3] Rozga, P. (2016). Using the three-parameter Weibull distribution in assessment of threshold strength of pressboard impregnated by different liquid dielectrics. IET Science, Measurement & Technology, 10(6), 665–670. https://doi.org/10.1049/iet-smt.2016.0061
[4] Aniserowicz, K. (2019). Analytical calculations of surges caused by direct lightning strike to underground intrusion detection system. Bulletin of the Polish Academy of Sciences: Technical Science, 67(2), 263–269. https://doi.org/10.24425/bpas.2019.128118
[5] Mosinski, F. (1995). Metody statystyczne w technice wysokich napięć. Wydawnictwo Politechniki Łódzkiej. (in Polish)
[6] Vibholm, S., & Thyregod, P. (1988). A study of the up-and-down method for non-normal distribution functions. IEEE Transactions on Electrical Insulation, 23(3), 357–364. https://doi.org/10.1109/14.2375
[7] Rozga, P. (2019). Lightning strength of gas, liquid and solid insulation – experience formthe laboratory tests. The International Conference on Power Transformers “Transformer’19”, 199–212.
[8] Khaled, U., & Beroual, A. (2020). Lightning impulse breakdown voltage of synthetic and natural ester liquids-based Fe3O4, Al2O3 and SiO2 nanofluids. Alexandria Engineering Journal, 59(5), 3709–3713. https://doi.org/10.1016/j.aej.2020.06.025
[9] Zhang, Q., You, H., Guo, C., Qin, Y., Ma, J., &Wen, T. (2016) Experimental research of dispersion of SF6 discharge breakdown voltage under lighting impulse. High Voltage Engineering, 42(11), 3415– 3420.
[10] Zhang, Y., Xie, S., Jiang, X., Ye, L., Zhang, Ch., Sun, P., Mu, Z., & Sima, W. (2019). Study on consistency of failure probability characteristics of oil-paper insulation under different impulse voltages. Proceedings of the 21st International Symposium on High Voltage Engineering, 1192–1206. https://doi.org/10.1007/978-3-030-31676-1_111
[11] Cousineau, D. (2009). Fitting the three-parameter Weibull distribution: review and evaluation of existing and new methods. IEEE Transactions on Dielectrics and Electrical Insulation, 16(1), 281– 288. https://doi.org/10.1109/TDEI.2009.4784578
[12] European Standards. (2014). Electric strength of insulating materials – Test methods – Part 3: Additional requirements for 1,2/50 μs impulse tests (IEC 60243-3: 2014).
[13] Witos, F., Opilski, Z., Szerszen, G., & Setkiewicz, M. (2019). The 8AE-PD computer measurement system for registration and analysis of acoustic emission signals generated by partial discharges in oil power transformers. Metrology and Measurement Systems, 26(2), 403–418. https://doi.org/10.24425/mms.2019.128355
[14] Shen, Z., Wang, F., Wang, Z., Li, J. (2021). A critical review of plant-based insulating fluids for transformer: 30 years of development. Renewable and Sustainable Energy Reviews, 41, 110783. https://doi.org/10.1016/j.rser.2021.110783
[15] Liu, Q., & Wang, Z. D. (2013) Breakdown and withstand strengths of ester transformer liquids in a quasi-uniform field under impulse voltages. IEEE Transactions on Dielectrics and Electrical Insulation, 20(2), 571–579. https://doi.org/10.1109/TDEI.2013.6508761
[16] Mohan Rao, U., Fofana, I., Beroual, A., Rozga, P., Pompili, M., Calcara, L., & Rapp, K. J. (2020). A review on pre-breakdown phenomena in ester fluids: Prepared by the international study group of IEEE DEIS liquid dielectrics technical committee. IEEE Transactions on Dielectrics and Electrical Insulation, 27(5), 1546–1560. https://doi.org/10.1109/TDEI.2020.008765
[17] Dixon,W. J. (1965). The Up-and-Down method for small samples. Journal of the American Statistical Association, 60, 967–978.
[18] Malska,W., & Mazur, D. (2017). Analiza wpływu prędkosci wiatru na generację mocy na przykładzie farmy wiatrowej. Przegląd Elektrotechniczny, 93(4), 54–57 https://doi.org/10.15199/48.2017.04.14
[19] Kalbfleisch, J. D., & Prentice, R. L. (2002). The statistical analysis of failure time data (2nd ed.). J. Wiley. https://doi.org/10.1002/9781118032985
[20] De Haan, L., & Ferreira, A. (2007). Extreme value theory: an introduction. Springer Science & Business Media. https://doi.org/10.1007/0-387-34471-3
[21] Chmura, L., Morshuis, P. H. F., Smit, J. J., & Janssen, A. (2015). Life-data analysis for condition assessment of high-voltage assets. IEEE Electrical Insulation Magazine, 31(5), 20–25. https://doi.org/10.1109/MEI.2015.7214443
[22] Cargill. (2018). https://www.cargill.com/bioindustrial/fr3-fluid/fr3-fluid-technical-details [23] Nynas. (20210). Nytro Taurus (IEC 60296) Ed. 5 – Standard Grade. https://www.nynas.com/en/product-areas/transformer-oils/oils/nytro-taurus/
[24] Rozga P., Beroual A., Przybylek P., Jaroszewski M., & Strzelecki K. (2020). A review on synthetic ester liquids for transformer applications. Energies, 13(23), 6429. https://doi.org/10.3390/en13236429
[25] European Standards. (2011). Power transformers – Part 1: General (IEC 60076-1:2011)
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Authors and Affiliations

Artur Klarecki
1 2
Paweł Rózga
1
Filip Stuchała
1

  1. Lodz University of Technology, Institute of Electrical Power Engineering, Stefanowskiego 18/22, 90-924 Lodz, Poland
  2. Lodz University of Technology, Interdisciplinary Doctoral School, Zeromskiego 116, 90-924 Lodz, Poland
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Abstract

The paper presents a method of structural monitoring using measurement of vertical displacements realized optically by horizontally directed laser beam. A measuring device with an integrated rangefinder and inclinometer sensor was developed. Inclinometer sensor are used to correct measurement results of the rangefinder in order to eliminate errors resulting from spatial position changes of the laser beam. Such a solution was adopted as an alternative to a more complex and demanding method, which is the stabilization of the laser beam orientation. The proposed inclinometric correction method allows in a simple and clear way to eliminate a serious problem of the displacement measurement method with a perpendicularly directed laser beam, which is inevitable in practice the lack of permanent stability of the measuring device position. The developed measuring device is wireless, both in terms of power supply and communication with other elements of the monitoring system. In order to verify the correctness of measurements carried out by the developed device, on site tests were carried out in two industrial-warehouse buildings with functioning monitoring systems using other measurement methods, earlier verified. The tests confirmed compliance with the indications of the existing system at a level completely sufficient for structural monitoring system purposes. The conducted research show that the proposed method of displacements measurement with inclinometric correction of errors, provides accurate and reliable results, allowing also to obtain additional information about the behaviour of the structure in the place of installation of the measuring device.
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Authors and Affiliations

Stanisław Wierzbicki
1
ORCID: ORCID
Zbigniew Pióro
2 3
Marcin Osiniak
3

  1. Warsaw University of Technology, Faculty of Civil Engineering, Al. Armii Ludowej 16, 00-637 Warsaw, Poland
  2. Warsaw University of Technology, Faculty of Electronics and Information Technology, Nowowiejska15/19, 00-665 Warsaw (retired professor)
  3. WiSeNe Sp. z o.o., Taneczna 27, 02-829 Warsaw, Poland
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Abstract

Present paper is a continuation of works on evaluation of red, green, blue (RGB) to hue, saturation, intensity (HSI) colour space transformation in regard to digital image processing application in optical measurements methods. HSI colour space seems to be the most suitable domain for engineering applications due to its immunity to non-uniform lightning. Previous stages referred to the analysis of various RGB to HSI colour space transformations equivalence and programming platform configuration influence on the algorithms execution. The main purpose of this step is to understand the influence of computer processor architecture on the computing time, since analysis of images requires considerable computer resources. The technical development of computer components is very fast and selection of particular processor architecture can be an advantage for fastening the image analysis and then the measurements results. In this paper the colour space transformation algorithms, their complexity and execution time are discussed. The most common algorithms were compared with the authors own one. Computing time was considered as the main criterion taking into account a technical advancement of two computer processor architectures. It was shown that proposed algorithm was characterized by shorter execution time than in reported previously results.

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Authors and Affiliations

Andrzej Ziemba
Elżbieta Fornalik-Wajs

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