Measuring Equipment and Metrology最新文献

{"title":"THEORETICAL-EXPERIMENTAL METHOD OF CALCULATION OF WEIGHT COEFFICIENTS OF THE ARTIFICIAL NEURAL-LIKE NETWORK IN DIAGNOSTIC SYSTEMS OF HYDROAGREGATES","authors":"V. Hraniak, S. Katsyv, V. Kukharchuk","doi":"10.23939/ISTCMTM2019.01.005","DOIUrl":"https://doi.org/10.23939/ISTCMTM2019.01.005","url":null,"abstract":"In the article was proposed a new theoretical-experimental method for determining the weight coefficients of an artificial neural-like network. The authors propose using coefficients of correlation between the spatially distributed points of the hydro unit as these coefficients, The article contains theoretical substantiation of the dependence nature of the correction factors on the load of the hydro unit and the water pressure in the reservoir. These theoretical positions are confirmed by experimental research. This research was carried out at the industrial equipment of the Hydro power station. A serious problem in frequency analysis of vibration signals of hydro units consists in the non-periodical character of the signals. Therefore, is proposed an original method for determining the coefficients of correlation between the spatially distributed points of the hydro unit. It involves the prior use of a wavelet transformation. In the course of an experimental research it was found that that the dependence of the coefficients of correlation between the pressures of water in the reservoir at low frequencies is due to the dependence of the lapidary flow from the pressure of water in the reservoir. The reason for the change in the coefficients of inter-correlation in the thirteenth frequency band is the cavitations phenomenon. As a result of the research, it has been proved that in the indicated frequency bands, the coefficients of the correlation of vibration signals in the spatially distributed quasi-symmetric points of the hydro aggregate change significantly when the water pressure in the reservoir changes. This makes it possible to consider them as an additional sign of the presence of the hydrodynamic component of the vibration.","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123961602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SENSITIVE ELEMENTS OF TEMPERATURE CONVERTERS BASED ON HfNi1-xCuxSn THERMOMETRICAL MATERIAL","authors":"V. Krayovskyy, M. Rokomanyuk, Nataliya Luzhetska, V. Pashkevych, V. Romaka, Y. Stadnyk, L. Romaka, A. Horyn","doi":"10.23939/istcmtm2023.01.011","DOIUrl":"https://doi.org/10.23939/istcmtm2023.01.011","url":null,"abstract":"The results of experimental studies of sensitive elements of temperature transducers based on semiconductor thermometric material HfNi1-xCuxSn are presented. Thermometric materials HfNi1-xCuxSn, x=0.01–0.10, were produced by fusing a charge of components in an electric arc furnace with a tungsten electrode (cathode) in an atmosphere of purified argon under a pressure of 0.1 kPa on a copper water-cooled base (anode). Heat treatment of the alloys consisted of homogenizing annealing at a temperature of 1073 K. The samples were annealed for 720 hours. in quartz glass ampoules vacuumed to 1.0 Pa in muffle electric furnaces with temperature control with an accuracy of ±10 K. Diffraction data arrays were obtained on a STOE STADI-P powder diffractometer (Cu Kα1 radiation), and the structural characteristics of HfNi1-xCuxSn were calculated using the Fullprof program. The chemical and phase compositions of the samples were monitored using metallographic analysis (scanning electron microscope Tescan Vega 3 LMU). The thermoelectric pair platinum-thermometric material Pt-HfNi0.99Cu0.01Sn was the basis of the thermoelectric converter. Modeling of thermometric characteristics of sensitive elements of thermotransducers in the temperature range of 4.2–1000 K was carried out by the full potential linearized plane wave method (Full Potential Linearized Augmented Plane Waves, Elk software package). The results of experimental measurements served as reference currents for modeling characteristics. X-ray phase analysis showed the absence of traces of extraneous phases in the diffractograms of the studied samples of HfNi1-xCuxSn thermometric materials, and the microprobe analysis of the concentration of atoms on their surface established the correspondence to the original composition of the charge. Refinement of the crystal structure of HfNi1-xCuxSn showed that the introduction of Cu atoms orders the structure, which makes it stable, and the kinetic characteristics are reproducible during thermocycling at temperatures T=4.2–1000 K. Ordering the structure of the thermometric material HfNi1-xCuxSn leads to changes in the electronic structure. At the same time, the number of donors decreases – Ni leaves the Hf position, and the substitution of Ni atoms for Cu leads to the generation of structural defects of the donor nature (Cu atoms contain more 3d-electrons), and another donor band εD Cu will appear in the band gap εg. For the sensitive elements of thermoconverters at Cu impurity concentrations x=0.005 and x=0.01, the temperature dependences of the specific electrical resistance ln(ρ(1/T)) contain activation areas, which is consistent with the results of electronic structure modeling. This indicates the location of the Fermi level εF in the band gap εg, and the negative value of the thermopower coefficient α(T) at these temperatures specifies its position – near the conduction band εC. The value of the activation energy from the Fermi level εF to the bottom of the condu","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122401889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RSA ALGORITHM IN FRACTIONAL-RATIONAL N-ARY FORMS WHILE ENCRYPTION-DECRYPTION OF MONOCHROME IMAGES","authors":"A. Kovalchuk, Nataliia Kustra, S. Yatsyshyn","doi":"10.23939/istcmtm2022.03.011","DOIUrl":"https://doi.org/10.23939/istcmtm2022.03.011","url":null,"abstract":"The basis for image protection is the assumption that the image is a stochastic signal. But the image is a specific signal that possesses, in addition to typical informativeness (informativeness of data), also visual informativeness, which brings new challenges to the issue of protection. Therefore, the urgent task is to implement such application of the RSA algorithm that when encrypting an image: – the cryptographic stability of the RSA algorithm did not deteriorate; – achieves full image noise to prevent the use of visual image processing methods. An algorithm for encryption-decryption of monochrome images in fractional-rational forms of order n using the elements of the RSA algorithm is proposed, as the most resistant to unauthorized decryption of signals. The proposed algorithm is applied to images with strictly separated contours. Elements of the RSA algorithm are applied to construct the coefficients of fractional-rational affine transformations. The developed algorithm is inherent in the higher cryptographic stability compared to the ordinary RSA algorithm. The possibilities of using the elements of the RSA algorithm in affine transformations while encrypting and decrypting images are described. The results of encryption modeling for cryptographic transformations of monochrome images of a given dimension are given. Modified models and algorithmic procedures of key formation processes, direct and inverse cryptographic transformations, reduced to mathematical element-by-element operations, have been developed.","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"93 25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125019961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"INTELLIGENT SYSTEM OF TEMPERATURE MONITORING IN REFRIGERATED CONTAINERS","authors":"H. Vlakh-Vyhrynovska, U. Dzelendzyak, O. Ivanyuk, Mishel Vyhrynovskiy","doi":"10.23939/istcmtm2023.02.017","DOIUrl":"https://doi.org/10.23939/istcmtm2023.02.017","url":null,"abstract":"The work emphasizes the importance of maintaining a consistent temperature while transporting temperature-sensitive goods in the logistics cold chain. Refrigerated transportation plays a critical role in this chain, and the safe and efficient transport of perishable goods, such as food or pharmaceuticals, heavily relies on maintaining appropriate temperature levels. Real-time temperature monitoring and timely response to deviations are vital to prevent spoilage and financial losses. This paper presents an intelligent temperature monitoring system that employs a WiFi-enabled IoT platform NodeMCU-ESP32 to collect real-time temperature data, which is then transmitted to the AWS cloud platform. The system uses machine learning algorithms to predict temperature deviations and sends alerts to relevant stakeholders via the Telegram messaging service. The system architecture comprises AWS services, including API Gateway, IAM, Lambda, DynamoDB, and SNS, offering a scalable, secure, and cost-effective temperature monitoring solution.","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127859530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RISK MANAGEMENT IN THE CLINIC - DIAGNOSTIC LABORATORIES","authors":"I. Sydorko, R. Baitsar","doi":"10.23939/istcmtm2020.02.030","DOIUrl":"https://doi.org/10.23939/istcmtm2020.02.030","url":null,"abstract":". Adopting socially responsible management practices of the organization promotes greater awareness in decision-making, based on a better understanding of society’s expectations, anticipation of risks, and opportunities. Responsible management of an organization can improve its relationships with stakeholders. Encouraging compliance with regulatory obligations leads to decisions that are more likely to gain the support and trust of those who implement them and who they influence. The result can be improved risk management practices and improved reputation. The concept of “risk” today has a fairly broad meaning and is used in completely different contexts. Synonyms of risk can be such concepts as “danger”, “threat”, “trouble”, etc. However, in many definitions of risk in the scientific literature, this term is used in a special sense, where risk is associated primarily with the concept of uncertainty. Therefore, the risk is understood as uncertainty, which can result in one or another adverse event. Clinical risks – risks that arise directly from the provision of medical care. These include clinical errors and negligence, infections in medical care, and non-consent. The principles of risk management and the need to use them are effectively applied in many areas of economic activity and public administration, including health care, as well as institutions that provide regulatory activities in these areas, including clinical diagnostic laboratories. Today, prevention as management of patient quality of health has become a dominant part of medicine, where laboratory diagnostics, which can detect the risks of many diseases, is not the least important. The presence in the health care system of only certain fragments of activity risk necessitates the formation of an overwhelming majority of an effective integrated risk management system, which must comply with certain requirements and principles: determining the characteristics of the system; optimization of the risk management model of medical structures; substantiation of prerequisites for the introduction of a comprehensive medical risk management system and evaluation of the effectiveness of its operation.","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116391410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEPENDENCE OF DISPERSION OF MEASUREMENT RESULTS ON DURATION OF MEASUREMENT","authors":"Z. Kolodiy, M. Yatsiv","doi":"10.23939/ISTCMTM2019.02.005","DOIUrl":"https://doi.org/10.23939/ISTCMTM2019.02.005","url":null,"abstract":"","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121560240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FEATURES OF SIMULATION OF CHARACTERISTICS OF THERMOMETRIC MATERIAL Lu1-xZrxNiSb","authors":"V. Krayovskyy, V. Pashkevych, A. Horpenuk, V. Romaka, Y. Stadnyk, L. Romaka, A. Horyn, V. Romaka","doi":"10.23939/istcmtm2021.04.012","DOIUrl":"https://doi.org/10.23939/istcmtm2021.04.012","url":null,"abstract":"The results of modeling the thermometric characteristics of the semiconductor solid solution Lu1-xZrxNiSb, which is a promising thermometric material for the manufacture of sensitive elements of thermoelectric and electro resistive thermocouples, are presented. Modeling of the electronic structure of Lu1-xZrxNiSb was performed by the Korringa-Kohn-Rostoker (KKR) method in the approximation of coherent potential and local density and by the full-potential method of linearized plane waves (FLAPW). KKR simulations were performed using the AkaiKKR software package in the local density approximation for the exchangecorrelation potential with parameterization Moruzzi, Janak, Williams in the semi-relativistic one taking into account the spin-orbit interaction. The implementation of the method in the Elk software package was used to perform FLAPW calculations. To check the limits of the existence of the thermometric material Lu1-xZrxNiSb, both methods were used to calculate the change in the values of the period of the unit cell a(x) in the range x=0–1.0. It is shown that there is an agreement between the change in the values of a(x) Lu1-xZrxNiSb calculated by the FLAPW method and the results of experimental studies. The obtained result indicates higher accuracy of modeling of structural parameters Lu1-xZrxNiSb by the FLAPW method in comparison with the KKR method. To study the possibility of obtaining thermometric material Lu1-xZrxNiSb and to establish the limits of its existence in the form of a continuous solid solution, modeling of thermodynamic characteristics in the approximation of harmonic oscillations of atoms within the theory of DFT density functional for a hypothetical solid solution Lu1-xZrxNiSb, x=0–1.0. The change in the values of the enthalpy of mixing ΔH and the total energy E Lu1-xZrxNiSb, x=0–1.0, allows us to state that the thermometric material exists in the form of a solid substitution solution in the concentration range x=0–0.20, stratification occurs (spinoidal phase decay) and thermometric material does not exist. To understand the mechanisms of electrical conductivity of the thermometric material Lu1-xZrxNiSb, the methods of entry of impurity Zr atoms into the matrix of the basic semiconductor p-LuNiSb and their occupation of different crystallographic positions, as well as the presence of vacancies in them, were investigated. For this purpose, its electronic structure was modeled for different variants of the spatial arrangement of atoms and the presence of vacancies in crystallographic positions. It is shown that the most acceptable results of experimental studies are the model of the electronic structure of p-LuNiSb, which assumes the presence of vacancies in the crystallographic positions of 4a Lu atoms (~0.005) and 4c Ni atoms (~0.04). In this model of the spatial arrangement of atoms and the presence of vacancies at positions 4a and 4c, the LuNiSb compound is a semiconductor of the hole-type conductivity, in which the Ferm","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127353848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SMART SYSTEM FOR MONITORING WATER QUALITY PARAMETERS","authors":"O. Gonsor","doi":"10.23939/istcmtm2022.04.018","DOIUrl":"https://doi.org/10.23939/istcmtm2022.04.018","url":null,"abstract":"Water is the most crucial factor for all living organisms, so it is essential to protect it. And water quality monitoring is one of the first steps required in the rational development and management of water resources. Smart systems used for real-time quality control and power consumption are rapidly developing. Their implementation in water quality assurance systems is essential and actual. The three-level smart system presented in this article involves the processing of water samples testing results from water supply sources, from the distribution network (consumers), test results of testing laboratories, and data from water consumption accounting systems. Transmission of the obtained results to consumers applying wireless communication technologies is an important system feature.","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131968006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"METROLOGICAL RISKS AND STATE OF THE MONITORED OBJECTS","authors":"S. Yatsyshyn, R. Baitsar, S. Lazarenko, N. Lazarenko, R. Mastylo","doi":"10.23939/istcmtm2022.01.017","DOIUrl":"https://doi.org/10.23939/istcmtm2022.01.017","url":null,"abstract":"The metrological risks of goods production are studied in the work. They are estimated conjugating with the existing technology as well as its metrological support. It is confirmed that in addition to the factors due to the processing of measurement results, the peculiarities of metrological support should be taken into account. One of the characteristic parameters of the metrological instruments is the variance of the measured value. Multiple measurements of the electrical resistance of the mentioned instruments - high-precision resistors designed for indirect measurement of current by measuring the voltage on them, using a DC bridge, were performed. The variance of obtained results is estimated, depending on the number of repeated measurements, the time interval between them, etc.","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127965915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PRIMARY CONVERTERS FOR TEMPERATURE MEASUREMENT IN METALLURGY","authors":"V. Fedynets, Yaroslav Yusyk, I. Vasylkivskyi, N. Huk","doi":"10.23939/ISTCMTM2019.02.041","DOIUrl":"https://doi.org/10.23939/ISTCMTM2019.02.041","url":null,"abstract":"The successful implementation of the systems of automation in metallurgical industry is impossible without the presence of reliable primary information about the parameters of technological process. A temperature is one of basic parameters that determine the quantitative and quality indicators of the final products. Therefore the technological processes of metallurgical industry need the presence of various primary transformers of temperature with high accuracy, sensitivity, stability and resistance to interference. The article gives a review of thermometric and construction materials for creation of primary measuring transducers with the set metrological descriptions, transducers for measuring of temperature in a domain production, gas streams in the technological processes of metallurgy, molten metals and intellectual measuring transducers. Depending on the technologically possible limits of errors of measuring of temperature in different metallurgical processes, this article offers application of existent technical equipment for these measures with providing their features, metrological descriptions, overall dimensions and general view. In this article the basic requirements to the temperature measuring in metallurgy are provided, as well as basic properties of thermometric and construction materials that must be taken into account for providing metrological and operating descriptions of primary measuring transducers are considered. It offers primary measuring transducers for measuring of temperature of entry parameters, parameters of domain process, equipment and gas streams in a domain production, transducers for measuring of temperature of molten metals. The basic requirements to the intellectual measuring transformers for measuring of temperature in metallurgy are considered, as well as their brief review and metrological characteristics. Tools of measuring the temperature are systematized for different technological processes in metallurgy, which gives an opportunity to correctly choose transducers by metrological descriptions and structural parameters. The article attempts to acquaint specialists, researchers, scientists, graduate students and students with new devices for measuring temperatures in different metallurgical processes, which are commercially produced in Ukraine.","PeriodicalId":415989,"journal":{"name":"Measuring Equipment and Metrology","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133936057","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}