Journal of Engineering Studies and Research最新文献_第7页

DESIGN ANALYSIS OF AN AUTOMATIC PHASE SELECTOR 自动选相器的设计分析

Journal of Engineering Studies and Research Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.288

Adedotun O. Owojori, Abiodun M. Akinbolade, K. Akingbade

{"title":"DESIGN ANALYSIS OF AN AUTOMATIC PHASE SELECTOR","authors":"Adedotun O. Owojori, Abiodun M. Akinbolade, K. Akingbade","doi":"10.29081/jesr.v27i3.288","DOIUrl":"https://doi.org/10.29081/jesr.v27i3.288","url":null,"abstract":"Power instability in Nigeria caused by overbearing demand of power by consumers and lack of proper maintenance of the power system devices among others has brought about the need for alternative power sources such as generators, solar, typical inverters and other alternative supplies which requires one form of switching or the other to achieve phase selection during power failure. This paper gives a design analysis of an automatic phase selector linking available power supplies, that is; switching between a three-phase public utility supply, as a result of total power outage in the public supply to an alternative secondary supply (in this case a Generator and an Inverter system) and back when power is restored. The design adopts the use of a microcontroller-based system interconnected with other hardware components for proper isolation, switching and visualization of switching conditions. The system design is divided into two major part: the hardware which consists of the power supply, sensing circuit, controller or control logic circuit, display and the power electronics switching unit and the software instruction code on the microcontroller unit. The design analysis was first carried out accompanied with computer simulation on a software tool (Proteus 8 Professional, version 8.4) to carry out performance evaluation of the sub-circuits, thereafter, a practical implementation of the design was carried out and tested with the utility power supply using five (5) switches, three of which represents the three-phase primary supply and the other two represents the secondary supply.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44069605","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}

引用次数: 0

ENVIRONMENTAL TEMPERATURE AND HUMIDITY MONITORING SYSTEM USING RASPBERRY PI 4 AND THINGSPEACK 环境温湿度监测系统采用树莓PI 4和thingspeak

Journal of Engineering Studies and Research Pub Date : 2022-01-10 DOI: 10.29081/jesr.v27i3.283

Dragoș Andrioaia, George Culea, Petru Puiu

引用次数: 0

SOCIAL AND ERGONOMIC EVALUATION OF MOTORCYCLE PROTECTIVE ISOLATION SHIELD FOR REDUCING COMMUNITY SPREAD OF COVID-19 摩托车防护隔离罩减少COVID-19社区传播的社会与工效学评价

Journal of Engineering Studies and Research Pub Date : 2021-12-15 DOI: 10.29081/jesr.v27i4.301

O. Oyesiku, O. O. Akinyemi, B. Odufuwa, B. O. Adetifa

{"title":"SOCIAL AND ERGONOMIC EVALUATION OF MOTORCYCLE PROTECTIVE ISOLATION SHIELD FOR REDUCING COMMUNITY SPREAD OF COVID-19","authors":"O. Oyesiku, O. O. Akinyemi, B. Odufuwa, B. O. Adetifa","doi":"10.29081/jesr.v27i4.301","DOIUrl":"https://doi.org/10.29081/jesr.v27i4.301","url":null,"abstract":"Coronavirus (COVID-19) pandemic have rapidly evolved into a situation with profound effects on lifestyle and travel worldwide, ranging from a dramatic decrease in the patronage of formal public transport modes to an unprecedented increase in the usage of informal public transport modes. It is the main goal of this study to adapt a Motorcycle Protective Isolation Shield (MPIS) on a motorcycle for the reduction of community spread of COVID-19. MPIS was designed according to the anthropometry data obtained from motorcycle riders and passengers; and was fabricated using locally available materials. Anthropometry data used for the MPIS frame were sitting height (SH) and popliteal height (PH) of both motorcycle riders and passengers while seat depth (SD) of motorcycle riders and buttock knee length (BKL) of motorcycle passengers were used to locate the position of the MPIS mounted on the motorcycle. The 50% of the anthropometry data used for the design of MPIS is SH=800.00 mm, PH=500.00 mm, SD=300.00 mm and BKL=550.00 mm. The uncertainty modelling of motorcycle accident occurrence reveals the effect of higher speeds and the adapted MPIS during riding. The probability of occurrence of fatal crash, major crash and minor crash of motorcycle accident was 36.3%, 35.3% and 28.4%, respectively. The MPIS showed satisfactory post-riding assessment in terms of riding stability; riding, steering, and sitting convenience; and riding comfort for both the riders and passengers. It will be a good protection for motorcycle riders against the risk of COVID-19 and other air-borne infections.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42165771","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}

引用次数: 0

DEVELOPMENT OF AN IMPROVED DATABASE FOR YORUBA HANDWRITTEN CHARACTER 开发改进的约鲁巴手写体字符数据库

Journal of Engineering Studies and Research Pub Date : 2021-12-15 DOI: 10.29081/jesr.v27i4.302

Oluwashina O. Oyeniran, Joshua O. Oyeniyi, L. Omotosho, I. Ogundoyin

引用次数: 0

EFFECT OF SOLUTION pH AND TEMPERATURE ON PHENOL ADSORPTION ONTO CARBONIZED RICE HUSK CHEMICALLY ACTIVATED WITH PHOSPHORIC ACID 溶液pH和温度对磷酸化学活化稻壳对苯酚吸附的影响

Journal of Engineering Studies and Research Pub Date : 2021-12-15 DOI: 10.29081/jesr.v27i4.296

Y. S. Mohammad, M. U. Garba, M. A. Muhammad, Y. Azeh, S. Y. Bagirei

引用次数: 0

TOTAL SUSPENDED PARTICULATES FROM CRUDE OIL SPILL 原油泄漏产生的悬浮微粒总数

Journal of Engineering Studies and Research Pub Date : 2021-12-15 DOI: 10.29081/jesr.v27i4.299

O. Okedere, A. J. Adesanmi, J. Sonibare, O. Adesina, G. Adeniyi

{"title":"TOTAL SUSPENDED PARTICULATES FROM CRUDE OIL SPILL","authors":"O. Okedere, A. J. Adesanmi, J. Sonibare, O. Adesina, G. Adeniyi","doi":"10.29081/jesr.v27i4.299","DOIUrl":"https://doi.org/10.29081/jesr.v27i4.299","url":null,"abstract":"Total suspended particulates emitted during crude oil spill were investigated using laboratory simulation experiments. This was with a view to establishing the toxicity potentials of emitted particulates. Climatic and spill media conditions similar to those obtainable in real life were created in an environmental chamber and the total particulates emitted during spills involving three crude oil samples of Nigerian origin were measured with Quick Take sampler. The toxicity potentials of the emitted particulates were subsequently determined by dividing the 24- hour averaging period concentrations of the particulates by the statutory limit. The statutory limits used were those of Nigeria’s Federal Ministry of Environment (FMENV), World Bank and the World Health Organization (WHO). For temperatures between 15 ºC and 35 ºC and spill media (over fresh water, sea water and soil), the extrapolated 24 – hour averaging period concentrations ranged between 186.79 – 584.28 μgm-3, 186.98 - 584.48 μgm-3 and 247.40- 350.21 μgm-3 for sample A; 183.44 – 571.99 μgm-3, 183.63 -572.19 μgm-3 and 244.05-337.92 μgm-3 for sample B and 178.41 – 566.96 μgm-3, 178.61 - 567.16 μgm-3 and 332.89- 280.60 μgm-3 for sample C. The observed TSP concentrations breached the WHO (lower limit) and World Bank limits at all temperatures and over all spill media and consequently the toxicity potentials exceeded 1.0 which were indications of hazards to human health. The study concluded that particulate emissions during crude oil could be high enough to pose threats and suggested adequate protection for cleaning up workers.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41803551","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}

引用次数: 0

STRETCH FORMING USING HEATED DIE 热模拉伸成形

Journal of Engineering Studies and Research Pub Date : 2021-12-15 DOI: 10.29081/jesr.v27i4.295

C. Grigoras, B. Chirita, V. Zichil, E. Herghelegiu, C. Tâmpu, V. Ciubotariu

{"title":"STRETCH FORMING USING HEATED DIE","authors":"C. Grigoras, B. Chirita, V. Zichil, E. Herghelegiu, C. Tâmpu, V. Ciubotariu","doi":"10.29081/jesr.v27i4.295","DOIUrl":"https://doi.org/10.29081/jesr.v27i4.295","url":null,"abstract":"The stretch forming process implies stretching and drawing into shape a sheet of material onto a die. This method is used, among other sectors, in the construction of aeroplane fuselage, as significant, complex parts can be obtained in one piece. In essence, stretch forming implies working with materials that have medium to high spring back effects, such as aluminium or magnesium alloys. Different approaches are used in manufacturing due to this phenomenon, ranging from incremental processes to multipoint dies. Another critical aspect of this process is to know how the material behaves under severe plastic deformation, as different alloys require different approaches that vary from step by step forming to in-process chemical treatments to manual pounding the metal sheet. However, all these alloys have in common that, when heated, their machinability properties improve. In this experimental study, a heated die approach was taken into consideration. 6x60 mm 100W heating elements along with temperature sensors were fitted into the die. The USB/OC326009 metal sheet is in direct contact with the die, thus assuring the heat transfer, as the temperatures reach 200 °C. The die temperature is software controlled so that maximum temperature and thermal inertia could be controlled with ease. The data indicate that this method offers significantly improved results compared to a normal room-temperature process.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46204367","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}

引用次数: 0

ERGONOMICS AND FUNCTIONAL REQUIREMENT IN THE DESIGN OF STUDENTS’ FURNITURE IN MOSHOOD ABIOLA POLYTECHNIC ABEOKUTA NIGERIA 尼日利亚阿贝奥库塔莫苏德阿比奥拉理工学院学生家具设计中的人体工程学和功能要求

Journal of Engineering Studies and Research Pub Date : 2021-12-15 DOI: 10.29081/jesr.v27i4.298

A. I. MUSA-OLOKUTA

引用次数: 0

INFLUENCE OF THE CRANK MECHANISM POSITION IN THE MOTION OF AN OSCILLATING SIEVE 曲柄机构位置对振动筛运动的影响

Journal of Engineering Studies and Research Pub Date : 2021-12-15 DOI: 10.29081/jesr.v27i4.297

E. Moșneguțu, N. Bârsan, Mirela Panainte-Lehăduș, D. Chițimuș, C. Tomozei

{"title":"INFLUENCE OF THE CRANK MECHANISM POSITION IN THE MOTION OF AN OSCILLATING SIEVE","authors":"E. Moșneguțu, N. Bârsan, Mirela Panainte-Lehăduș, D. Chițimuș, C. Tomozei","doi":"10.29081/jesr.v27i4.297","DOIUrl":"https://doi.org/10.29081/jesr.v27i4.297","url":null,"abstract":"This article presents a study that aims to visualize the influence exerted by the position of the crank mechanism on the motion performed by the sieve supports respectively, on the displacement of an oscillating sieve. The study was oriented for a specific constructive case and involves the connecting rod position changing, the drive mechanism in relation to the horizontal, respectively at the angles 0 - 75° and -45 - 0°. Also, were identifying the variation of the angle described by the motion of the sieve support. From the obtained results analysis, it was found that in the case of 12.71° of the connecting rod angle, in relation to the horizontal, the lowest value of the angle described by the motion of the tie rod between the extreme points was obtained. Also, for the value of the connecting rod angle of approximately 6.5° equal angles described by the extreme positions of the sieve support in relation to the vertical were obtained. It is found that the variation of the connecting rod angle directly influences the variation of the angles described by the connecting rod in relation to the horizontal, the measured value being corresponding to the extreme points P1 and P2.","PeriodicalId":15687,"journal":{"name":"Journal of Engineering Studies and Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47997012","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}

引用次数: 0

UTILIZATION OF POLYPROPYLENE IN BITUMINOUS CONCRETE 聚丙烯在沥青混凝土中的应用

Journal of Engineering Studies and Research Pub Date : 2021-12-15 DOI: 10.29081/jesr.v27i4.293

E. Chukwuka, Oladele O. Isiaka, Aderinlewo Olufikayo, Oyedepo Olugbenga

引用次数: 1