Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238244
S. Sotirov, S. Zhelyazkov, M. Marudova, G. Zsivanovits, Dimitar M. Tokamkov
In the present study, a computer visual system based on image processing was developed. Its application in the analysis of the quality of cherries stored for 3 weeks was shown. The developed color filtering of the images and the presentation of the object color as a RGB histogram allow detection of spoiled zones and monitoring of color changes.
{"title":"Embedded system for fruit image processing","authors":"S. Sotirov, S. Zhelyazkov, M. Marudova, G. Zsivanovits, Dimitar M. Tokamkov","doi":"10.1109/ET50336.2020.9238244","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238244","url":null,"abstract":"In the present study, a computer visual system based on image processing was developed. Its application in the analysis of the quality of cherries stored for 3 weeks was shown. The developed color filtering of the images and the presentation of the object color as a RGB histogram allow detection of spoiled zones and monitoring of color changes.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124540038","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238184
Nikolay Karnobatev
A low cost DC power data logger was designed. It could log data about generated solar energy from two solar systems. The power was measured indirectly. Calculation of power and energy was made every 255 ms. They were averaged and logged with interval one minute. The data logger was made in order to analyze the operation of different solar systems types: fixed mount vs. single axis, single axis vs. double axis, solar system with PWM vs. system with MPPT controller.
{"title":"Develop Test and Implementation of Low Cost DC Power Data Logger","authors":"Nikolay Karnobatev","doi":"10.1109/ET50336.2020.9238184","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238184","url":null,"abstract":"A low cost DC power data logger was designed. It could log data about generated solar energy from two solar systems. The power was measured indirectly. Calculation of power and energy was made every 255 ms. They were averaged and logged with interval one minute. The data logger was made in order to analyze the operation of different solar systems types: fixed mount vs. single axis, single axis vs. double axis, solar system with PWM vs. system with MPPT controller.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114312537","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238198
S. Yaryshev, I. Konyakhin, A. Timofeev, V. Korotaev, T. Djamiykov
Large or long objects require measuring systems as a combination of more than one measuring instrument. In this case, the combination of instruments is a network system consists of several measuring modules and one central module. Measuring modules make the preliminary computation of measuring information and translate it to the central module for the final computation of measuring parameters. The central module also makes statistics of measuring and archive of information. Some tasks require the noncontact methods of measuring angular and linear coordinates of objects or places. The Central module can perform two-stage processing of measurement information. In the first stage, the Central measuring module performs a preliminary configuration of the distributed measuring system based on the information received from GPS sensors. The second stage is to use the measuring information received from the peripheral modules based on optical-electronic measurement methods. Using two-stage processing can significantly improve the efficiency of a distributed measurement system. The optoelectronic measuring devices (OEMD) are ideal for these purposes. These devices also have other advantages like great precision, calibration, and adaptation. In this article variants of the distributed measuring systems are described. The basic attention is given to the description of the unified optoelectronic modules for the measurement of angular and linear coordinates.
{"title":"Universal Optoelectronic Measuring Modules in Advanced Distributed Measuring Systems","authors":"S. Yaryshev, I. Konyakhin, A. Timofeev, V. Korotaev, T. Djamiykov","doi":"10.1109/ET50336.2020.9238198","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238198","url":null,"abstract":"Large or long objects require measuring systems as a combination of more than one measuring instrument. In this case, the combination of instruments is a network system consists of several measuring modules and one central module. Measuring modules make the preliminary computation of measuring information and translate it to the central module for the final computation of measuring parameters. The central module also makes statistics of measuring and archive of information. Some tasks require the noncontact methods of measuring angular and linear coordinates of objects or places. The Central module can perform two-stage processing of measurement information. In the first stage, the Central measuring module performs a preliminary configuration of the distributed measuring system based on the information received from GPS sensors. The second stage is to use the measuring information received from the peripheral modules based on optical-electronic measurement methods. Using two-stage processing can significantly improve the efficiency of a distributed measurement system. The optoelectronic measuring devices (OEMD) are ideal for these purposes. These devices also have other advantages like great precision, calibration, and adaptation. In this article variants of the distributed measuring systems are described. The basic attention is given to the description of the unified optoelectronic modules for the measurement of angular and linear coordinates.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116989784","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238328
D. Chikurtev, S. Bogdanov, N. Spasova, Vladimir Ivaniv
The article defines criteria, conditions and requirements for the development and existence of an embedded system. A concept of an algorithm for intelligent behavior of an embedded system, which will be able to recompile software modules and components by itself and by the software core, is presented. The aim is to achieve sustainability, expand the functions of embedded systems and adapting the system to work in different environments.
{"title":"Prerequisites for a Self-sustaining Embedded System with Artificial Intelligence","authors":"D. Chikurtev, S. Bogdanov, N. Spasova, Vladimir Ivaniv","doi":"10.1109/ET50336.2020.9238328","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238328","url":null,"abstract":"The article defines criteria, conditions and requirements for the development and existence of an embedded system. A concept of an algorithm for intelligent behavior of an embedded system, which will be able to recompile software modules and components by itself and by the software core, is presented. The aim is to achieve sustainability, expand the functions of embedded systems and adapting the system to work in different environments.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"266 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116396878","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238217
Devina Manoeva, Vasil Pichurov
This paper presents results from a study about an addressable LED wearable indicator system concept increasing visibility and safe interaction between E-bike users and other participants in urban traffic. To this end, we explore existing solutions for small and energy-efficient signaling devices. Exemplar we select one product as basic model, analyze its characteristics and in search of a more suitable functionality for the scientific project for autonomous cargo E-bikes “AuRa”, we offer new technical and design requirements. The conducted experimental part is based on investigating safety and ergonomics to QC-test some critical timings of selected LEDs. We want to integrate findings from this and upcoming studies to formulate construction indications for a future control hardware and software design as a proposal for the project “AuRa”.
{"title":"Addressable LED/ Buzzer structures for signaling/ reflection for urban E-Bikes","authors":"Devina Manoeva, Vasil Pichurov","doi":"10.1109/ET50336.2020.9238217","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238217","url":null,"abstract":"This paper presents results from a study about an addressable LED wearable indicator system concept increasing visibility and safe interaction between E-bike users and other participants in urban traffic. To this end, we explore existing solutions for small and energy-efficient signaling devices. Exemplar we select one product as basic model, analyze its characteristics and in search of a more suitable functionality for the scientific project for autonomous cargo E-bikes “AuRa”, we offer new technical and design requirements. The conducted experimental part is based on investigating safety and ergonomics to QC-test some critical timings of selected LEDs. We want to integrate findings from this and upcoming studies to formulate construction indications for a future control hardware and software design as a proposal for the project “AuRa”.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117132645","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238182
A. Perçuku, D. Minkovska, L. Stoyanova, Arta Abdullahu
Internet of Things (IoT) and Big Data are one of important and promising technologies that have attracted more attention today in industry. In this work is created a custom electronic circuit which can be used to get sensor's data, using Raspberry Pi IoT device on PV solar panel. Python programming language is used to write and run program in Raspberry Pi, and establish a connection to database for storing data. The main aim of this paper is to model an Apache Cassandra database for processing and storing massive amounts of data that come from sensors. As a case study is used a PV polycrystalline solar module of 250 W.
{"title":"IoT Using Raspberry PI and Apache Cassandra on PV Solar System","authors":"A. Perçuku, D. Minkovska, L. Stoyanova, Arta Abdullahu","doi":"10.1109/ET50336.2020.9238182","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238182","url":null,"abstract":"Internet of Things (IoT) and Big Data are one of important and promising technologies that have attracted more attention today in industry. In this work is created a custom electronic circuit which can be used to get sensor's data, using Raspberry Pi IoT device on PV solar panel. Python programming language is used to write and run program in Raspberry Pi, and establish a connection to database for storing data. The main aim of this paper is to model an Apache Cassandra database for processing and storing massive amounts of data that come from sensors. As a case study is used a PV polycrystalline solar module of 250 W.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"18 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127669231","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238305
Berat Ujkani, D. Minkovska, L. Stoyanova
Recommender systems allow making personalized recommendations for items or products while browsing online, using numerous algorithms and techniques to predict and recommend potentially useful items to a specific user. This paper presents a system built for the purpose of filtering out WordPress themes trough the ratings or reviews of other similar users using item-based collaborative filtering technique and provide user-specific recommendations for the largest online marketplace of web templates called Themeforest, part of Envato marketplaces.
{"title":"A recommender system for WordPress themes using item-based collaborative filtering technique","authors":"Berat Ujkani, D. Minkovska, L. Stoyanova","doi":"10.1109/ET50336.2020.9238305","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238305","url":null,"abstract":"Recommender systems allow making personalized recommendations for items or products while browsing online, using numerous algorithms and techniques to predict and recommend potentially useful items to a specific user. This paper presents a system built for the purpose of filtering out WordPress themes trough the ratings or reviews of other similar users using item-based collaborative filtering technique and provide user-specific recommendations for the largest online marketplace of web templates called Themeforest, part of Envato marketplaces.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131860852","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238295
Stefan Hensel, M. Marinov, Max Schmitt
A novel approach for synchronization and calibration of a camera and an inertial measurement unit (IMU) in the research-oriented visual-inertial mapping-and localization-framework maplab is presented. Mapping and localization are based on detecting different features in the environment. In addition to the possibility of creating single-case maps, the included algorithms allow merging maps to increase mapping accuracy and obtain large-scale maps. Furthermore, the algorithms can be used to optimize the collected data. The preliminary results show that after appropriate calibration and synchronization maplab can be used efficiently for mapping, especially in rooms and small building environments.
{"title":"System Setup for Synchronized Visual-Inertial Localization and Mapping","authors":"Stefan Hensel, M. Marinov, Max Schmitt","doi":"10.1109/ET50336.2020.9238295","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238295","url":null,"abstract":"A novel approach for synchronization and calibration of a camera and an inertial measurement unit (IMU) in the research-oriented visual-inertial mapping-and localization-framework maplab is presented. Mapping and localization are based on detecting different features in the environment. In addition to the possibility of creating single-case maps, the included algorithms allow merging maps to increase mapping accuracy and obtain large-scale maps. Furthermore, the algorithms can be used to optimize the collected data. The preliminary results show that after appropriate calibration and synchronization maplab can be used efficiently for mapping, especially in rooms and small building environments.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124326060","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238326
Dimitar D. Arnaudov
The paper presents comparison of a five-phase and a six-phase converter for charging energy storage elements - batteries and supercapacitors. The converters are structured as modules made of five or six units working on a common load. Models of five-phase and six-phase converter are made in LTSpice software. In this research a spectral analysis is performed of the load current when currents amplitude of each source changes. The comparison is made for the same output power.
{"title":"Comparative Analysis of Multiphase Topology for Energy Storage Systems","authors":"Dimitar D. Arnaudov","doi":"10.1109/ET50336.2020.9238326","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238326","url":null,"abstract":"The paper presents comparison of a five-phase and a six-phase converter for charging energy storage elements - batteries and supercapacitors. The converters are structured as modules made of five or six units working on a common load. Models of five-phase and six-phase converter are made in LTSpice software. In this research a spectral analysis is performed of the load current when currents amplitude of each source changes. The comparison is made for the same output power.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134394738","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}
Pub Date : 2020-09-16DOI: 10.1109/ET50336.2020.9238254
S. Biliderov, M. Kambushev, K. Kambushev, A. Marinov, R. Dimitrova
In the proposed development, a modeling of the operation of the NAVSTAR-GPS system, determining the positions of the satellites and the distances to them is made. The information obtained in this way is entered into the computer for control of an autonomous unmanned aerial vehicle, and the data of the satellites that have failed from the working constellation are replaced with those from the model. The main goal is to improve the accuracy and reliability in piloting and navigation of unmanned aerial vehicles.
{"title":"Recovery of GPS Disability to Unmanned Aircrafts by System Modeling","authors":"S. Biliderov, M. Kambushev, K. Kambushev, A. Marinov, R. Dimitrova","doi":"10.1109/ET50336.2020.9238254","DOIUrl":"https://doi.org/10.1109/ET50336.2020.9238254","url":null,"abstract":"In the proposed development, a modeling of the operation of the NAVSTAR-GPS system, determining the positions of the satellites and the distances to them is made. The information obtained in this way is entered into the computer for control of an autonomous unmanned aerial vehicle, and the data of the satellites that have failed from the working constellation are replaced with those from the model. The main goal is to improve the accuracy and reliability in piloting and navigation of unmanned aerial vehicles.","PeriodicalId":178356,"journal":{"name":"2020 XXIX International Scientific Conference Electronics (ET)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133247186","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}
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