Poemysl Svoboda, M. Novák, Viktor Bubla, P. Pokorný
A new device for measuring the electrospinning process was developed. The device is suitable for measuring an electrospinning process of various setups, meaning different electrodes, voltages and solutions. The device can be used as an oscillograph to show the present signal or as an autonomous control device. The device is robust to damage by high voltage.
{"title":"Apparatus for feedback control of electrospinning process","authors":"Poemysl Svoboda, M. Novák, Viktor Bubla, P. Pokorný","doi":"10.1109/AE.2014.7011722","DOIUrl":"https://doi.org/10.1109/AE.2014.7011722","url":null,"abstract":"A new device for measuring the electrospinning process was developed. The device is suitable for measuring an electrospinning process of various setups, meaning different electrodes, voltages and solutions. The device can be used as an oscillograph to show the present signal or as an autonomous control device. The device is robust to damage by high voltage.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117222864","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}
The HART protocol is a specification designed for industrial process automation and control. In this paper we provide the design and implementation of the communication module with HART protocol. The primary objective of the designed hardware is to minimize current consumption so that the module is powered by a 4-20 mA current loop. The employed parts have also been selected with regard to the minimum current consumption. Another requirement for the proposed module was its galvanic isolation from the measuring device. Communication between the HART communication module and the measuring device is implemented as shared access to the I2C EEPROM and FRAM. The basic idea for the software development was to use real-time operating system and divide the program into separate processes with mutual communication. As an operating system we choose FreeRTOS, which is able to perform processes (tasks) on the basis of events as well as to use preemptive scheduling. By a suitable proposal of hardware and software we managed to present a flexible solution that meets the former requirements.
{"title":"Development of a HART compatible HART line powered communication module","authors":"K. Dudácek, J. Ledvina, V. Vavricka","doi":"10.1109/AE.2014.7011672","DOIUrl":"https://doi.org/10.1109/AE.2014.7011672","url":null,"abstract":"The HART protocol is a specification designed for industrial process automation and control. In this paper we provide the design and implementation of the communication module with HART protocol. The primary objective of the designed hardware is to minimize current consumption so that the module is powered by a 4-20 mA current loop. The employed parts have also been selected with regard to the minimum current consumption. Another requirement for the proposed module was its galvanic isolation from the measuring device. Communication between the HART communication module and the measuring device is implemented as shared access to the I2C EEPROM and FRAM. The basic idea for the software development was to use real-time operating system and divide the program into separate processes with mutual communication. As an operating system we choose FreeRTOS, which is able to perform processes (tasks) on the basis of events as well as to use preemptive scheduling. By a suitable proposal of hardware and software we managed to present a flexible solution that meets the former requirements.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127169672","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}
The purpose of this paper is to analyze the theoretical feasibility of several classes of iterated maps with specified, desired properties, to help design the feasible ones, and further investigate some of their properties. As the main theoretical result, we establish some feasibility conditions for iterated maps suitable for the implementation on microsystems. The topic intimately relates to exponential Diophantine equations, namely to the new type represented by equation, with variables tk and xk.
{"title":"Iterated maps with exponential slopes for nonlinear dynamics generation","authors":"H. Teodorescu","doi":"10.1109/AE.2014.7011723","DOIUrl":"https://doi.org/10.1109/AE.2014.7011723","url":null,"abstract":"The purpose of this paper is to analyze the theoretical feasibility of several classes of iterated maps with specified, desired properties, to help design the feasible ones, and further investigate some of their properties. As the main theoretical result, we establish some feasibility conditions for iterated maps suitable for the implementation on microsystems. The topic intimately relates to exponential Diophantine equations, namely to the new type represented by equation, with variables tk and xk.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123874096","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}
Controller area network (CAN) is deployed in wide scale of applications at present. Many of these applications are sensitive to faults in terms of quality of communication. The article describes a novel online diagnostic method which aim is to recognize progressively degrading nodes on the data bus. The method uses existing network equipment and requires no additional/specialized network nodes. Standard components for CAN bus faults management like node error counters are used instead.
{"title":"New method of CAN nodes health monitoring","authors":"Tomas Pospisil, J. Novák","doi":"10.1109/AE.2014.7011713","DOIUrl":"https://doi.org/10.1109/AE.2014.7011713","url":null,"abstract":"Controller area network (CAN) is deployed in wide scale of applications at present. Many of these applications are sensitive to faults in terms of quality of communication. The article describes a novel online diagnostic method which aim is to recognize progressively degrading nodes on the data bus. The method uses existing network equipment and requires no additional/specialized network nodes. Standard components for CAN bus faults management like node error counters are used instead.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116499151","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}
This paper investigates topologically independent vector modulation for multilevel converters. The investigate vector modulation is Space Vector PWM (SVPWM) which was implemented in FPGA and also tested in development board MLC interface with low-voltage prototype of three-level Neutral Point Clamped (3L-NPC) converter. The main advantages and disadvantages which were found out during implementation and hardware tests are also described in this paper.
{"title":"Implementation of SVPWM algorithm without trigonometric functions","authors":"D. Janik, T. Kosan, Jaroslav Sadsky, Z. Peroutka","doi":"10.1109/AE.2014.7011684","DOIUrl":"https://doi.org/10.1109/AE.2014.7011684","url":null,"abstract":"This paper investigates topologically independent vector modulation for multilevel converters. The investigate vector modulation is Space Vector PWM (SVPWM) which was implemented in FPGA and also tested in development board MLC interface with low-voltage prototype of three-level Neutral Point Clamped (3L-NPC) converter. The main advantages and disadvantages which were found out during implementation and hardware tests are also described in this paper.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126411812","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}
This paper deals with the symbolic solution of the switched current circuits. As is described, the general principle of the transformation graph method can be used for finding admittance matrix of medium size networks and/or sub-networks. The admittance matrix is assembled from four submatrices after reduction each submatrix by partial reduction formula. There is described principle for decomposition general reduction formula into partial reduction formula. Thus solving is more clearly than reduction matrices after composition from submatrices.
{"title":"Matrix method derived from graph method of SI circuit solution","authors":"D. Matousek, Bohumil Brtnik","doi":"10.1109/AE.2014.7011700","DOIUrl":"https://doi.org/10.1109/AE.2014.7011700","url":null,"abstract":"This paper deals with the symbolic solution of the switched current circuits. As is described, the general principle of the transformation graph method can be used for finding admittance matrix of medium size networks and/or sub-networks. The admittance matrix is assembled from four submatrices after reduction each submatrix by partial reduction formula. There is described principle for decomposition general reduction formula into partial reduction formula. Thus solving is more clearly than reduction matrices after composition from submatrices.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131206524","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}
Martin Jara, V. Blahnik, Z. Peroutka, J. Talla, I. Matuljak
This paper describes control algorithm for the controlled single-phase H-bridge power inverter with LCL filter. The LCL type of the filter provides significant reduction of the current ripple. On the other hand the stability of the circuit is reduced as well, especially the current control stability which is the reason for double current control implementation. This solution provides direct current control of both the converter input and output side currents while the main control requirement is to provide the precise sinusoidal output current waveform. The proposed control was verified on a laboratory prototype of H-bridge power inverter with medium switching frequency (over thousands of Hertz) and with inconsiderable (3.3 μs) dead-times.
{"title":"Control of H-bridge power inverter with LCL filter","authors":"Martin Jara, V. Blahnik, Z. Peroutka, J. Talla, I. Matuljak","doi":"10.1109/AE.2014.7011685","DOIUrl":"https://doi.org/10.1109/AE.2014.7011685","url":null,"abstract":"This paper describes control algorithm for the controlled single-phase H-bridge power inverter with LCL filter. The LCL type of the filter provides significant reduction of the current ripple. On the other hand the stability of the circuit is reduced as well, especially the current control stability which is the reason for double current control implementation. This solution provides direct current control of both the converter input and output side currents while the main control requirement is to provide the precise sinusoidal output current waveform. The proposed control was verified on a laboratory prototype of H-bridge power inverter with medium switching frequency (over thousands of Hertz) and with inconsiderable (3.3 μs) dead-times.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124580895","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}
Electric conductivity is one of dominant parameters for improving electromagnetic shielding resistivity, reducing electrostatic charge accumulation and creating intelligent textile structures containing conductive tracks. Conductive fabrics have obtained increased attention mainly due to their desirable flexibility and lightweight. Knowledge of electrical properties of textile material (for example in fiber or yarn form) is very important especially for conductivity prediction of whole system “fiber - yarn - fabric” and subsequent design of product for specific application. Variety methods of measurement (ammeter and voltmeter, Wheatstone-bridge method) and many different arrangements of the material to be tested can be used. Bulldog clips are used most often to hold the yarn between electrodes. The contact resistance generated at measured material/metal bulldog clip interface creates measurement errors. This phenomenon leads to lower accuracy and reproducibility of measurements. The main aim of this work is introduction of innovated method eliminating contact resistance problem. This method is based on measurement of two and more sections of yarns and then electrical resistance calculation which is not loaded with measurement errors.
{"title":"An approach to electrical resistance measurement eliminating contact resistance problem","authors":"V. Safarova, L. Hes, J. Militký","doi":"10.1109/AE.2014.7011715","DOIUrl":"https://doi.org/10.1109/AE.2014.7011715","url":null,"abstract":"Electric conductivity is one of dominant parameters for improving electromagnetic shielding resistivity, reducing electrostatic charge accumulation and creating intelligent textile structures containing conductive tracks. Conductive fabrics have obtained increased attention mainly due to their desirable flexibility and lightweight. Knowledge of electrical properties of textile material (for example in fiber or yarn form) is very important especially for conductivity prediction of whole system “fiber - yarn - fabric” and subsequent design of product for specific application. Variety methods of measurement (ammeter and voltmeter, Wheatstone-bridge method) and many different arrangements of the material to be tested can be used. Bulldog clips are used most often to hold the yarn between electrodes. The contact resistance generated at measured material/metal bulldog clip interface creates measurement errors. This phenomenon leads to lower accuracy and reproducibility of measurements. The main aim of this work is introduction of innovated method eliminating contact resistance problem. This method is based on measurement of two and more sections of yarns and then electrical resistance calculation which is not loaded with measurement errors.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126147761","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}
Mean arterial pressure (MAP) is the pressure in the arteries averaged over time. Oscillometric blood pressure (BP) monitors determine the value of MAP by processing arterial pulses in the cuff. Cuff pressure at the point of largest pulse amplitude is equal to MAP. The oscillometric determination of MAP is subject to errors resulting from wave reflections and stroke volume variability. We developed an experimental system that uses two cuffs in order to improve accuracy of noninvasive BP measurement. The system consists of a compact module with pneumatic and electronic circuits, two detachable cuffs (arm and wrist), and a notebook computer connected to the module via a USB cable. This study concentrated on improvements in the determination of MAP using the wrist cuff pulses. The smallest wrist cuff amplitude in the middle segment of BP test was determined as the point of MAP. The corresponding arm cuff pressure was the value of MAP. Waveforms and cuff pressures from 40 BP tests were used to determine oscillometric, wrist cuff, and calculated MAP values and the values were compared. The results indicated that it is possible to determine MAP from wrist cuff pulse amplitudes and that the wrist cuff method may be more accurate than the oscillometric method.
{"title":"Wrist cuff method determines mean arterial pressure in dual-cuff blood pressure system","authors":"J. Jílek, M. Stork","doi":"10.1109/AE.2014.7011687","DOIUrl":"https://doi.org/10.1109/AE.2014.7011687","url":null,"abstract":"Mean arterial pressure (MAP) is the pressure in the arteries averaged over time. Oscillometric blood pressure (BP) monitors determine the value of MAP by processing arterial pulses in the cuff. Cuff pressure at the point of largest pulse amplitude is equal to MAP. The oscillometric determination of MAP is subject to errors resulting from wave reflections and stroke volume variability. We developed an experimental system that uses two cuffs in order to improve accuracy of noninvasive BP measurement. The system consists of a compact module with pneumatic and electronic circuits, two detachable cuffs (arm and wrist), and a notebook computer connected to the module via a USB cable. This study concentrated on improvements in the determination of MAP using the wrist cuff pulses. The smallest wrist cuff amplitude in the middle segment of BP test was determined as the point of MAP. The corresponding arm cuff pressure was the value of MAP. Waveforms and cuff pressures from 40 BP tests were used to determine oscillometric, wrist cuff, and calculated MAP values and the values were compared. The results indicated that it is possible to determine MAP from wrist cuff pulse amplitudes and that the wrist cuff method may be more accurate than the oscillometric method.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129849705","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}
L. Majer, J. Mihálov, V. Stopjaková, R. Záluský, J. Brenkus, Matej Uram
A new multi-protocol wireless measurement system applicable for smart households is presented in this paper. The system is based on a multi-standard wireless concept that by employing so-called RF network combiner can offer the interoperability of several protocols/networks. The main goal is monitoring several different parameters and processes by utilizing a multiplex oriented management software that might be useful in reduction of the size and the total power consumption for monitoring devices in smart households. Therefore, the measurement module is equipped with a microcontroller with RF module for ZigBee PRO, ANT+ or BlueTooth LE networks. Measured parameters are sent through a wireless network to an acquisition point (the RF combiner), which collects the data and transfers it to a database server. Here, the data is stored and can be accessed remotely via internet. Through this network, user can view live data as well as history of the measurement stored in the database server.
{"title":"An RF network combiner towards a wireless multi-communication system for smart households","authors":"L. Majer, J. Mihálov, V. Stopjaková, R. Záluský, J. Brenkus, Matej Uram","doi":"10.1109/AE.2014.7011699","DOIUrl":"https://doi.org/10.1109/AE.2014.7011699","url":null,"abstract":"A new multi-protocol wireless measurement system applicable for smart households is presented in this paper. The system is based on a multi-standard wireless concept that by employing so-called RF network combiner can offer the interoperability of several protocols/networks. The main goal is monitoring several different parameters and processes by utilizing a multiplex oriented management software that might be useful in reduction of the size and the total power consumption for monitoring devices in smart households. Therefore, the measurement module is equipped with a microcontroller with RF module for ZigBee PRO, ANT+ or BlueTooth LE networks. Measured parameters are sent through a wireless network to an acquisition point (the RF combiner), which collects the data and transfers it to a database server. Here, the data is stored and can be accessed remotely via internet. Through this network, user can view live data as well as history of the measurement stored in the database server.","PeriodicalId":149779,"journal":{"name":"2014 International Conference on Applied Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128974852","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：