{"title":"Automatic Common Mode Electrode-Amplifier Impedance Balance: Implementation and Results","authors":"D. Dobrev, T. Neycheva","doi":"10.1109/ET.2019.8878610","DOIUrl":"https://doi.org/10.1109/ET.2019.8878610","url":null,"abstract":"Power-line interference (PLI) is the major disturbing factor in all ground-free biosignal acquisition applications. The PLI currents picked up by the body must flow through the sensing electrodes, then the electrode cables and finally via the amplifier input impedances they reach the amplifier ground. The electrode impedances and the amplifier input impedances form Wheatstone bridge. Because the electrode impedances vary with time, the bridge tends to be imbalanced and produces differential PLI which is amplified together with the useful signal. An automatic impedance balancing approach, using software PLL for line synchronization, was published. This paper validates the approach through practical results from its implementation.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131063891","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":"Development of Intelligent Electronic Systems Maintenance Strategy whose Volume and Content Depend on the Technical Resource Spent Part","authors":"A. Georgiev, J. Garipova, T. Papanchev","doi":"10.1109/ET.2019.8878493","DOIUrl":"https://doi.org/10.1109/ET.2019.8878493","url":null,"abstract":"In this paper is discussed some important issues regarding the electronic systems maintenance. The ability to decide on maintenance based on the technical resource spent part or the operational shelf-life spend is analyzed. The block diagrams illustrating the algorithm for making ether prevention or emergency recovery decisions are presented.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114758979","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":"Computer Simulation and Experimental Investigation of Used Digital Development Environments for PWM DC Motor Control in Engineering Teaching","authors":"T. Grigorova, B. Pachedjieva","doi":"10.1109/ET.2019.8878596","DOIUrl":"https://doi.org/10.1109/ET.2019.8878596","url":null,"abstract":"The paper presents a computer simulation and an experimental investigation of used low voltage digital development environments for PWM DC motor control in engineering teaching. This training is aimed at mastering the knowledge of power system operation conditions and obtaining skills for computer simulation and software development of various PWM methods for speed control of DC motors.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133774470","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":"Modeling of a Tree-Phase 12/8 Pole Switched Reluctance Motor in MATLAB","authors":"D. Yankov, T. Grigorova, E. Dinkov","doi":"10.1109/ET.2019.8878654","DOIUrl":"https://doi.org/10.1109/ET.2019.8878654","url":null,"abstract":"The paper presents a MATLAB model of a 3 phase 12/8 SRM using equations, which define the dynamic behavior of the linear inductance profile of the motor. The model is simulated and validated through the voltage control strategy and the hysteresis current control method. The accuracy of the model is proved with simulation results.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132901328","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":"Enhanced Simulation Framework for Realisation of Mobility in 6LoWPAN Wireless Sensor Networks","authors":"R. Vasilev, A. Haka","doi":"10.1109/ET.2019.8878669","DOIUrl":"https://doi.org/10.1109/ET.2019.8878669","url":null,"abstract":"The intense incursion of the Internet of Things (IoT) into all areas of modern life has led to a need for a more detailed study of these technologies and their mechanisms of work. It is necessary to study mechanisms in order to improve QoS, security, identifying shortest routes, mobility, etc. This paper proposes an enhanced simulation framework that implements an improved mechanism for prioritising traffic on 6LoWPAN networks and the realisation of micro-mobility.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"11 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129200992","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":"A Wi-Fi to UART Bridge for Firmware Updates of Microcontrollers","authors":"Lubomir Bogdanov","doi":"10.1109/ET.2019.8878578","DOIUrl":"https://doi.org/10.1109/ET.2019.8878578","url":null,"abstract":"An implementation of an adapter that bridges the Wi-Fi network to a standard UART interface is shown in this paper. A network processor could be attached to any existing microcontroller and could expose any UART-based bootloader to the rest of the world. The motivation behind this research is the Internet-of-Things (IoT) trend and targets firmware development.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127902419","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":"Temperature Sensing with Inkjet Printed Structures","authors":"E. Gieva, G. Nikolov, B. Nikolova, I. Ruskova","doi":"10.1109/ET.2019.8878639","DOIUrl":"https://doi.org/10.1109/ET.2019.8878639","url":null,"abstract":"In the present publication we have investigated the temperature dependence of a resistive structure printed with Inkjet technology. We have also investigated the change of impedance with heating in a thermo-chamber and its change at cooling. The results obtained are described and analysed to determine the influence of temperature sintering on the properties of the printed layers as well as to find application of the structures as sensing elements.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123021263","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}
Ivelina Asenova Mladenova, P. Petkov, B. Bonev, S. Patil, Yuliyan Velchev
{"title":"EMC sensor for monitoring of EM field safety of mobile networks","authors":"Ivelina Asenova Mladenova, P. Petkov, B. Bonev, S. Patil, Yuliyan Velchev","doi":"10.1109/ET.2019.8878666","DOIUrl":"https://doi.org/10.1109/ET.2019.8878666","url":null,"abstract":"This paper describes an electromagnetic compatibility sensor for mobile networks monitoring. It consists of wideband fractal dipole antenna, band pass hairpin filter and radio frequency power measurement unit. The antenna is designed as two identical dipoles with fractal geometry. These fractal structures are located on both sides of the substrate. The proposed antenna design with three hexagons for each fractals has good characteristics in wide frequency range from 0,8GHz to 3,6GHz. The presented work is intended to be a key node in a sensor network for radio frequency monitoring.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117304529","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":"System For Early Warning And Monitoring Of Wildfires","authors":"Stefan M. Rizanov, A. Stoynova, D. Todorov","doi":"10.1109/ET.2019.8878653","DOIUrl":"https://doi.org/10.1109/ET.2019.8878653","url":null,"abstract":"Due to the high rate of forest fire occurrences and the inflicted damages, methods for their early detection, monitoring and behavioral modeling have been created. Within this article these methods are shown as well as their deficiencies. Proposed is a LoRa-based autonomous system for early warning and monitoring, whose objectives are to overcome these shortcomings and aid the process of software behavioral modeling, providing real time local measurements of a group of parameters for applying corrections to the simulation models.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115826727","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":"Investigation of an LLC resonant DC/DC converter with a capacitive output filter, Part II-Design Considerations","authors":"T. Grigorova, A. Vuchev, I. Maradzhiev","doi":"10.1109/ET.2019.8878657","DOIUrl":"https://doi.org/10.1109/ET.2019.8878657","url":null,"abstract":"The paper presents design consideration for the LLC resonant DC/DC converter with a capacitive output filter. Different conditions for receiving ZVS commutation are discussed, as well as the possibility of using ZVS drivers, allowing operation with soft switching within wide load range. The design procedure was verified through simulation and experimental results.","PeriodicalId":306452,"journal":{"name":"2019 IEEE XXVIII International Scientific Conference Electronics (ET)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126731047","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}