2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)最新文献
Pub Date : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704806
H.M.B Sibanyoni, J.J. Walker, J. S. Djeumen
The corona phenomenon is one of the key elements that should be considered when designing High Voltage transmission lines. This phenomenon is known to compromise the efficiency of the transmission lines and may cause electromagnetic interference (EMI) in telecommunication lines. This paper presents a comparable analysis of the sensitivity response of the electrical method and the ultraviolet (UV) imaging method to detect corona discharges under HVDC application. This comparable analysis was done by measuring the corona inception voltage for positive and negative DC voltage in a high voltage laboratory using a corona cage. The results show that the electrical method is more sensitive as compared to the UV imaging method.
{"title":"Sensitivity of The Electrical and UV Imaging Methods for Corona Detection Under HVDC Application","authors":"H.M.B Sibanyoni, J.J. Walker, J. S. Djeumen","doi":"10.1109/ROBOMECH.2019.8704806","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704806","url":null,"abstract":"The corona phenomenon is one of the key elements that should be considered when designing High Voltage transmission lines. This phenomenon is known to compromise the efficiency of the transmission lines and may cause electromagnetic interference (EMI) in telecommunication lines. This paper presents a comparable analysis of the sensitivity response of the electrical method and the ultraviolet (UV) imaging method to detect corona discharges under HVDC application. This comparable analysis was done by measuring the corona inception voltage for positive and negative DC voltage in a high voltage laboratory using a corona cage. The results show that the electrical method is more sensitive as compared to the UV imaging method.","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129588206","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704781
Beatrice van Eden, Benjamin Rosman
Robot vision is an interdisciplinary field that deals with how robots can be made to gain high-level understanding from digital images or videos. Understanding an image at the pixel level often does not provide enough information for decision making and action taking. In this case, higher level semantic information that describes the image is required. This helps the robot to accomplish complex tasks that require visual understanding.For robots to add value they need to be sufficiently effective at executing tasks in different settings. Despite many impressive advances in robot vision, robots still lack the ability to function as humans do in complex environments. Importantly, this includes being able to interpret and understand the perceptual complexities of the world.Robot vision is dependant on ideas from both computer vision and machine learning. In this paper we provide a overview of the advances in these disciplines and how they contribute to robot vision.
{"title":"An overview of robot vision","authors":"Beatrice van Eden, Benjamin Rosman","doi":"10.1109/ROBOMECH.2019.8704781","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704781","url":null,"abstract":"Robot vision is an interdisciplinary field that deals with how robots can be made to gain high-level understanding from digital images or videos. Understanding an image at the pixel level often does not provide enough information for decision making and action taking. In this case, higher level semantic information that describes the image is required. This helps the robot to accomplish complex tasks that require visual understanding.For robots to add value they need to be sufficiently effective at executing tasks in different settings. Despite many impressive advances in robot vision, robots still lack the ability to function as humans do in complex environments. Importantly, this includes being able to interpret and understand the perceptual complexities of the world.Robot vision is dependant on ideas from both computer vision and machine learning. In this paper we provide a overview of the advances in these disciplines and how they contribute to robot vision.","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"189 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134051532","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704789
B. Matebese, D. Withey, M. Banda
This paper deals with finding optimal paths for a mobile manipulator in the presence of obstacles. The motion planning of the robot kinematic system is formulated as an optimal control problem. Applying Pontryagin’s minimum principle, indirect conditions of optimality are derived for the optimal motion planning problem and solved numerically using the Leapfrog method. Simulation results for the mobile manipulator are presented to demonstrate the effectiveness of the proposed method.
{"title":"Optimal Paths for a Mobile Manipulator using the Leapfrog Method","authors":"B. Matebese, D. Withey, M. Banda","doi":"10.1109/ROBOMECH.2019.8704789","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704789","url":null,"abstract":"This paper deals with finding optimal paths for a mobile manipulator in the presence of obstacles. The motion planning of the robot kinematic system is formulated as an optimal control problem. Applying Pontryagin’s minimum principle, indirect conditions of optimality are derived for the optimal motion planning problem and solved numerically using the Leapfrog method. Simulation results for the mobile manipulator are presented to demonstrate the effectiveness of the proposed method.","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"39 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120906549","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704794
F. Fernandes, J. Van Coller, N. Mahatho
The proposed research aims to optically monitor the dry pollution level on transformer bushings and determine the possible leakage current should the dry polluted surface be critically wetted. The research involves the implementation of an image capturing system with appropriate image processing. Preliminary image capture of four artificial levels of salt deposit pollution: clean, light, medium and heavy is successfully achieved. The percentage level of surface pollution is found using image binary thresholding. For light pollution, the pollution surface coverage is found to be 8%, with each consecutive level increasing by 3%. These serve as part of the input to a neural network that will output the predicted dry pollution level and type in the image. The leakage current must be measured at various known pollution levels under wetted conditions. These values are stored as a reference that the neural network must then use to correlate the predicted dry pollution level to leakage current under wetted conditions. The standard methods used to classify pollution types and severity is presented. The dynamics governing bushing flashover under polluted conditions is discussed. The actual pollution level and type is quantified using Equivalent Salt Deposit Density (ESDD) and Non-Soluble Deposit Density (NSDD). Image segmentation and border extraction are illustrated to output four variables related to surface pollutants: area ratio, coverage, shape factor and eccentricity. The first two parameters are proposed as measures of surface pollution density, while the latter two may assist in pollution type identification. For more accurate pollution type identification, reflectance transformation imaging (RTI) is proposed. With a saliency mapping resolution of approximately 100 μm, the feature recognition between salt deposits and dust and dust deposits is more readily attained.
{"title":"A Case for Optical Pollution Monitoring of Bushings","authors":"F. Fernandes, J. Van Coller, N. Mahatho","doi":"10.1109/ROBOMECH.2019.8704794","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704794","url":null,"abstract":"The proposed research aims to optically monitor the dry pollution level on transformer bushings and determine the possible leakage current should the dry polluted surface be critically wetted. The research involves the implementation of an image capturing system with appropriate image processing. Preliminary image capture of four artificial levels of salt deposit pollution: clean, light, medium and heavy is successfully achieved. The percentage level of surface pollution is found using image binary thresholding. For light pollution, the pollution surface coverage is found to be 8%, with each consecutive level increasing by 3%. These serve as part of the input to a neural network that will output the predicted dry pollution level and type in the image. The leakage current must be measured at various known pollution levels under wetted conditions. These values are stored as a reference that the neural network must then use to correlate the predicted dry pollution level to leakage current under wetted conditions. The standard methods used to classify pollution types and severity is presented. The dynamics governing bushing flashover under polluted conditions is discussed. The actual pollution level and type is quantified using Equivalent Salt Deposit Density (ESDD) and Non-Soluble Deposit Density (NSDD). Image segmentation and border extraction are illustrated to output four variables related to surface pollutants: area ratio, coverage, shape factor and eccentricity. The first two parameters are proposed as measures of surface pollution density, while the latter two may assist in pollution type identification. For more accurate pollution type identification, reflectance transformation imaging (RTI) is proposed. With a saliency mapping resolution of approximately 100 μm, the feature recognition between salt deposits and dust and dust deposits is more readily attained.","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117053413","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704801
Ian Jannasch, D. Sabatta
This paper proposes a control system for a tilt-rotor tricopter. This vehicle has 3 sets of propellers with one mounted on a servo to control the yaw movement. This results in asymmetry which requires a more complex control system to achieve stability. This paper proposes a gain scheduling PID control system designed for and implemented in such a tricopter. Flight stability was achieved by using decoupled control systems for positive and negative offsets of pitch and roll, and a separate controller for yaw. We present the step response of these controllers and show that the proposed system is able to stabilise the tricopter in flight
{"title":"Design and construction of a self-levelling tricopter using gain scheduling and PID controllers","authors":"Ian Jannasch, D. Sabatta","doi":"10.1109/ROBOMECH.2019.8704801","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704801","url":null,"abstract":"This paper proposes a control system for a tilt-rotor tricopter. This vehicle has 3 sets of propellers with one mounted on a servo to control the yaw movement. This results in asymmetry which requires a more complex control system to achieve stability. This paper proposes a gain scheduling PID control system designed for and implemented in such a tricopter. Flight stability was achieved by using decoupled control systems for positive and negative offsets of pitch and roll, and a separate controller for yaw. We present the step response of these controllers and show that the proposed system is able to stabilise the tricopter in flight","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117056499","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704796
B. Mangara
This study examines the effects of gender on class attendance, the performance in laboratory experiments and the overall course performance of undergraduate engineering students in an Electronic Fundamentals 1 course during semester 1 of 2018 at a public university in South Africa. Data was collected through documentation of: class attendance (for each student at each class lesson); the performance scores in four (4) laboratory experiments and a laboratory experiment test; and the overall course performance score. The overall course performance score constitutes of 50 % from a summative assessment and the other 50 % formed of formative components as follows: 25 % of class test 1, 40 % of class test 2 and 35 % of the overall laboratory experiment performance score. The independent samples t-test results revealed that there is no statistically significant effect of gender on: class attendance (t(174.46) = −0.958, p (= 0.339) > 0.05); overall laboratory experiments performance (t(229) = 0.565, p (= 0.573) > 0.05) and overall course performance (t(229) = −1.805, p (= 0.072) > 0.05).
{"title":"Class attendance and performance of undergraduate electronic engineering students: exploring the effects of gender","authors":"B. Mangara","doi":"10.1109/ROBOMECH.2019.8704796","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704796","url":null,"abstract":"This study examines the effects of gender on class attendance, the performance in laboratory experiments and the overall course performance of undergraduate engineering students in an Electronic Fundamentals 1 course during semester 1 of 2018 at a public university in South Africa. Data was collected through documentation of: class attendance (for each student at each class lesson); the performance scores in four (4) laboratory experiments and a laboratory experiment test; and the overall course performance score. The overall course performance score constitutes of 50 % from a summative assessment and the other 50 % formed of formative components as follows: 25 % of class test 1, 40 % of class test 2 and 35 % of the overall laboratory experiment performance score. The independent samples t-test results revealed that there is no statistically significant effect of gender on: class attendance (t(174.46) = −0.958, p (= 0.339) > 0.05); overall laboratory experiments performance (t(229) = 0.565, p (= 0.573) > 0.05) and overall course performance (t(229) = −1.805, p (= 0.072) > 0.05).","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129066323","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704740
M. Gaffoor, A. Jarvis, J. Archer, S. Perumal
Bulk high temperature superconductors (HTS) in their non-textured form consists of a network of weak-links at its grain boundaries. The weak-links are a result of an incorrect stoichiometric ratio or misaligned grain planes, and greatly reduce the critical current density. High temperature bulk superconductor, in our case Y1 Ba2 Cu3 O7-δ (YBCO), was doped with graphene oxide in the following weight percentages: 0, 0.5 and 0.7 wt. %. Resistance vs Temperature measurements were taken in zero field cooling (ZFC) and field cooling (FC) conditions in order to determine critical transition temperature (Tc) and to study the effect on the weak-links. It is observed that Tc in doped samples increased and there is an improvement in the weak-link effect in doped samples.
{"title":"Effect of Graphene Oxide Doping on Bulk High Temperature Superconductors For Power Applications","authors":"M. Gaffoor, A. Jarvis, J. Archer, S. Perumal","doi":"10.1109/ROBOMECH.2019.8704740","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704740","url":null,"abstract":"Bulk high temperature superconductors (HTS) in their non-textured form consists of a network of weak-links at its grain boundaries. The weak-links are a result of an incorrect stoichiometric ratio or misaligned grain planes, and greatly reduce the critical current density. High temperature bulk superconductor, in our case Y1 Ba2 Cu3 O7-δ (YBCO), was doped with graphene oxide in the following weight percentages: 0, 0.5 and 0.7 wt. %. Resistance vs Temperature measurements were taken in zero field cooling (ZFC) and field cooling (FC) conditions in order to determine critical transition temperature (Tc) and to study the effect on the weak-links. It is observed that Tc in doped samples increased and there is an improvement in the weak-link effect in doped samples.","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129815046","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704792
E. Sithole, A. Akumu, G. Irungu
Partial discharge (PD) in power transformer occurs due to high electric field strength in voids resulting in degradation of insulation. PD test is one of the pass criteria of power transformers after completion of repairs in transformer workshop. In order to facilitate quick repair of the defected area the localisation of the PD source is important. This research paper presents the result of the investigation of the effect of insulation barrier board on the acoustic wave propagation and detection. A couple of experiments carried out in the model transformer tank considering the case with transformer insulation barrier board with different thicknesses and being placed between PD source and the sensor at the different positions. From the results of the experiment, after thorough analysis, it was concluded that the barrier board influences the PD wave propagation, and this points to the fact that it can affect the PD localisation.
{"title":"Effects of insulation barrier board on power transformer PD detection using acoustics","authors":"E. Sithole, A. Akumu, G. Irungu","doi":"10.1109/ROBOMECH.2019.8704792","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704792","url":null,"abstract":"Partial discharge (PD) in power transformer occurs due to high electric field strength in voids resulting in degradation of insulation. PD test is one of the pass criteria of power transformers after completion of repairs in transformer workshop. In order to facilitate quick repair of the defected area the localisation of the PD source is important. This research paper presents the result of the investigation of the effect of insulation barrier board on the acoustic wave propagation and detection. A couple of experiments carried out in the model transformer tank considering the case with transformer insulation barrier board with different thicknesses and being placed between PD source and the sensor at the different positions. From the results of the experiment, after thorough analysis, it was concluded that the barrier board influences the PD wave propagation, and this points to the fact that it can affect the PD localisation.","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129830812","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704744
Gareth Oregan Hoskins, J. Padayachee, G. Bright
This research paper aims to investigate the possibilities of safe, cost efficient human-robot interaction. Robotic systems possess the ability to perform tasks at high repetition rates. However, unlike humans, robots are limited in terms of adaption and creativity. Human-robot interaction aims to combine these characteristics to achieve a highly efficient operation with the safety of the human being the main concern. Studies show that most robot accidents involve the operator. Current safety methods employed on robotic systems, such as safety cages and light curtains, reduce potential hazards to humans, but compromise human-robot interaction. The methods are also costly and require a large floor space. This proposed system is aimed at replacing these current safety methods, and employs a new method that involves hazard reduction as well as promoting human-robot interaction. The system can be installed directly onto a robot that is Arduino-driven. By combining various proximity sensors, the safety system can create its own operationally-flexible virtual zone. The main focus of this study is to test the capabilities of a mobile application into robotic safety. The application enforces a hierarchy system that gives each individual person a personal form of identification, as well as granting certain robotic privileges to certain individuals. An experiment will be performed by installing the system on to an Arduino-driven parallel robotic system. Various safety proof tests will be performed to evaluate the performance of the system. By introducing a flexible robotic safety system, manufacturers of the future will be able to perform operations involving collaboration between humans and robots, in a safe, constantly monitored environment.
{"title":"Human-Robot Interaction: The Safety Challenge (An inegrated frame work for human safety)","authors":"Gareth Oregan Hoskins, J. Padayachee, G. Bright","doi":"10.1109/ROBOMECH.2019.8704744","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704744","url":null,"abstract":"This research paper aims to investigate the possibilities of safe, cost efficient human-robot interaction. Robotic systems possess the ability to perform tasks at high repetition rates. However, unlike humans, robots are limited in terms of adaption and creativity. Human-robot interaction aims to combine these characteristics to achieve a highly efficient operation with the safety of the human being the main concern. Studies show that most robot accidents involve the operator. Current safety methods employed on robotic systems, such as safety cages and light curtains, reduce potential hazards to humans, but compromise human-robot interaction. The methods are also costly and require a large floor space. This proposed system is aimed at replacing these current safety methods, and employs a new method that involves hazard reduction as well as promoting human-robot interaction. The system can be installed directly onto a robot that is Arduino-driven. By combining various proximity sensors, the safety system can create its own operationally-flexible virtual zone. The main focus of this study is to test the capabilities of a mobile application into robotic safety. The application enforces a hierarchy system that gives each individual person a personal form of identification, as well as granting certain robotic privileges to certain individuals. An experiment will be performed by installing the system on to an Arduino-driven parallel robotic system. Various safety proof tests will be performed to evaluate the performance of the system. By introducing a flexible robotic safety system, manufacturers of the future will be able to perform operations involving collaboration between humans and robots, in a safe, constantly monitored environment.","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125485693","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 : 2019-01-01DOI: 10.1109/ROBOMECH.2019.8704774
Ashentha Naidoo, M. Tsoeu
Automatic speech recognition is a critical component of human language technologies. It concerns the translation of speech into textual data which can be processed by computers. Thus, it offers the creation of an intimate link allowing humans to interact with machines on a completely natural level. A variety of open-source toolkits exist for the development of these systems. These toolkits have been successfully implemented and tested for use on well-resourced languages. However, the same level of testing has not been performed for South African languages. This investigation sets out to evaluate popular open-source tools for South African languages and identify optimal toolkit configurations for each language and toolkit. The NCHLT corpora were used to set up automatic speech recognition systems for English and isiXhosa using Kaldi, CMU Sphinx, and HTK. The word error rates achieved during this investigation showed that the best configurations from this investigation achieved better performance than those which were reported by the developers of the NCHLT corpus.
{"title":"Evaluating Open-source Toolkits for Automatic Speech Recognition of South African Languages","authors":"Ashentha Naidoo, M. Tsoeu","doi":"10.1109/ROBOMECH.2019.8704774","DOIUrl":"https://doi.org/10.1109/ROBOMECH.2019.8704774","url":null,"abstract":"Automatic speech recognition is a critical component of human language technologies. It concerns the translation of speech into textual data which can be processed by computers. Thus, it offers the creation of an intimate link allowing humans to interact with machines on a completely natural level. A variety of open-source toolkits exist for the development of these systems. These toolkits have been successfully implemented and tested for use on well-resourced languages. However, the same level of testing has not been performed for South African languages. This investigation sets out to evaluate popular open-source tools for South African languages and identify optimal toolkit configurations for each language and toolkit. The NCHLT corpora were used to set up automatic speech recognition systems for English and isiXhosa using Kaldi, CMU Sphinx, and HTK. The word error rates achieved during this investigation showed that the best configurations from this investigation achieved better performance than those which were reported by the developers of the NCHLT corpus.","PeriodicalId":344332,"journal":{"name":"2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121615718","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}
2019 Southern African Universities Power Engineering Conference/Robotics and Mechatronics/Pattern Recognition Association of South Africa (SAUPEC/RobMech/PRASA)
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