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2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)最新文献

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Zero Voltage Switch DC/DC Resonant Converter for LED Lighting Applications 零电压开关DC/DC谐振变换器用于LED照明应用
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883625
Nikolay Hinov, G. Kraev, Gergana Vacheva
{"title":"Zero Voltage Switch DC/DC Resonant Converter for LED Lighting Applications","authors":"Nikolay Hinov, G. Kraev, Gergana Vacheva","doi":"10.1109/BLJ.2019.8883625","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883625","url":null,"abstract":"In the current paper a zero voltage switch DC/DC resonant converter for LED application is proposed. The mathematical model is described with differential equations.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"2022 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114701343","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
Annual use of luminaire groups for the entrance area according to the orientation of the road tunnel 根据道路隧道的朝向，每年对入口区域使用灯具组
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883580
A. Pachamanov, Borislav Pregyov, K. Kassev
{"title":"Annual use of luminaire groups for the entrance area according to the orientation of the road tunnel","authors":"A. Pachamanov, Borislav Pregyov, K. Kassev","doi":"10.1109/BLJ.2019.8883580","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883580","url":null,"abstract":"Annual use of luminaire groups for the entrance area according to the orientation of the road tunnel; Angel Pachamanov, Borislav Pregyov, Kiril Kassev. Adaptation tunnel lighting is performed with three or four groups of luminaires switched on or off when increasing or decreasing the adaptation brightness. The dependence between the operating power of the lighting and the duration of turning on the individual groups of luminaires varies with the different orientation of the tunnel portal. It is nonlinear, therefore the modes of operation and dimming of the groups of luminaires are determined by the so-called orderly schedule of adaptation brightness. It gives the frequency of occurrence of set values of adaptation brightness in the annual plan. For each orientation at the tunnel entrance, the ordered schedule is different, which is why the dimming mode of the luminaires from the available groups is different.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125183227","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: 5
Measurement systems used in measuring the illuminance of the road 测量道路照度的测量系统
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883667
P. Jaśkowski, P. Tomczuk
{"title":"Measurement systems used in measuring the illuminance of the road","authors":"P. Jaśkowski, P. Tomczuk","doi":"10.1109/BLJ.2019.8883667","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883667","url":null,"abstract":"Street lighting is one of the elements of road infrastructure that affects safety. Therefore, the important issue is the verification of the street lighting condition in the context of fulfilling the normative requirements. The currently used method of measuring road illumination with the use of handheld meter is labour-intense and time-consuming, as a result of which the street lighting audit is neglected. An alternative method of measurement is the measurement systems located on the vehicle. The publication presents the methods used in the measuring of the illuminance of road. Attention is paid to the disadvantages of the commonly used static method and an alternative is presented by using mobile systems to measure the lighting condition on the road. Authors presented a change in the concept of measuring systems built over the years, including own concept implemented with the results of pilot studies.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129624597","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: 2
Influence of the Position of LED Luminaires on their Thermal Regimes in Photometrical Measurements with a Telecentric Photometer 远心光度计光度测量中LED灯具位置对其热状态的影响
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883660
Iva Petrinska, Dilyan Ivanov
{"title":"Influence of the Position of LED Luminaires on their Thermal Regimes in Photometrical Measurements with a Telecentric Photometer","authors":"Iva Petrinska, Dilyan Ivanov","doi":"10.1109/BLJ.2019.8883660","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883660","url":null,"abstract":"The current paper shows experimentally obtained results for the heating of a LED luminaire put in different burning positions during photometric measurements. Two different goniophotometers are considered – telecentric, where the light distribution of the luminaire is measured while the luminaire is positioned with the light sources facing up (this is not its prescribed burning position) and mirror distributive gonio photometer (MDGP), where the light distribution is measured while the luminaire is in its prescribed burning position. The first equipment has the advantage, that although the luminaire is not in its burning position, the measurement is much faster than when MDGP is used, so the thermal regime of the luminaire under consideration remains normal.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122008975","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
LED Luminaire Optical Lens Optimization for Road Lighting Designed According to Luminance Requirement 根据照度要求设计道路照明LED灯具光学透镜优化
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883670
Plamen Tsenkov Tsankov, M. Yovchev, Hristo Ibrishimov
{"title":"LED Luminaire Optical Lens Optimization for Road Lighting Designed According to Luminance Requirement","authors":"Plamen Tsenkov Tsankov, M. Yovchev, Hristo Ibrishimov","doi":"10.1109/BLJ.2019.8883670","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883670","url":null,"abstract":"A methodology for iterative optimization of optical systems for street LED luminaires intended for roads designed according to luminance requirement is proposed in the paper. The methodology comprises the following stages: iterative change of the shape of secondary lens of a computer model of the optical system, photometric analysis using the Monte Carlo raytracing method of the modelled three-dimensional optical systems to calculate their photometric characteristics, optimal road lighting calculations with an optimum criterion – maximum luminaire spacing meeting the requirements of standard for the selected M6 lighting class of the road, through the analysis of which the optimal solution is found.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125603287","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: 3
Three-Dimensional Computer Modeling of Secondary Lens for Street LED Luminaire in AutoCAD 路灯二次透镜在AutoCAD中的三维计算机建模
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883639
Plamen Tsenkov Tsankov, M. Yovchev, Hristo Ibrishimov
{"title":"Three-Dimensional Computer Modeling of Secondary Lens for Street LED Luminaire in AutoCAD","authors":"Plamen Tsenkov Tsankov, M. Yovchev, Hristo Ibrishimov","doi":"10.1109/BLJ.2019.8883639","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883639","url":null,"abstract":"In the paper is proposed methodology for iterative three-dimensional computer modeling of secondary optical lenses for street LED luminaires by using of Photopia and AutoCAD software. The methodology allows achieving of various desired light distributions of the luminaires by iteratively modifying the three-dimensional shape of the secondary lens. The created three-dimensional models of optical lenses shown are tested by Monte Carlo raytracing photometric analysis. The results confirm the performance and the possibilities for application of the proposed methodology.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124883158","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: 3
Estimation of the uncertainty in measurement of light distribution of luminaires by means of telecentric photometer 用远心光度计测量灯具光分布不确定度的估计
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883663
Iva Petrinska, K. Nikolova, Dilyan Ivanov, K. Georgiev
{"title":"Estimation of the uncertainty in measurement of light distribution of luminaires by means of telecentric photometer","authors":"Iva Petrinska, K. Nikolova, Dilyan Ivanov, K. Georgiev","doi":"10.1109/BLJ.2019.8883663","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883663","url":null,"abstract":"The paper shows the methodology for estimation of the calibration uncertainty of a telecentric photometer. It shows in details all the possible sources of uncertainty that should be considered in a photometrical measurement, according to the construction of the equipment. In order to verify the experimental results, a verification has also been carried out – the light distribution of the test luminaire has also been measured with a previously calibrated mirror distributive gonio photometer","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125173560","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: 1
Training stand with control systems for street, tunnel and industrial lighting 训练台与控制系统的街道，隧道和工业照明
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883664
K. Georgiev, Konstantin Hristov, M. Dimitrov, A. Pachamanov
{"title":"Training stand with control systems for street, tunnel and industrial lighting","authors":"K. Georgiev, Konstantin Hristov, M. Dimitrov, A. Pachamanov","doi":"10.1109/BLJ.2019.8883664","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883664","url":null,"abstract":"The report examines the real-world lighting systems of the TU-Sofia lighting laboratory, which will demonstrate to future lighting designers three types of special lighting systems and their management. In street lighting, an option for remote control of rehabilitated street systems is shown. With the tunnelighting system implemented, the two gates are not connected to each other and are monitored directly via the global network. The same system, with minor modifications, is also used to control the lighting of industrial halls on the luminance of the windows.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125056390","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: 2
Balkan Light Junior 2019 Title Page Balkan Light Junior 2019标题页
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/blj.2019.8883432
{"title":"Balkan Light Junior 2019 Title Page","authors":"","doi":"10.1109/blj.2019.8883432","DOIUrl":"https://doi.org/10.1109/blj.2019.8883432","url":null,"abstract":"","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130358451","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
Optimizing the levels of group dimming of luminaires for adaptation tunnel lighting 优化适应隧道照明的灯具组调光水平
2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior) Pub Date : 2019-09-01 DOI: 10.1109/BLJ.2019.8883631
A. Pachamanov, K. Georgiev, M. Dimitrov
{"title":"Optimizing the levels of group dimming of luminaires for adaptation tunnel lighting","authors":"A. Pachamanov, K. Georgiev, M. Dimitrov","doi":"10.1109/BLJ.2019.8883631","DOIUrl":"https://doi.org/10.1109/BLJ.2019.8883631","url":null,"abstract":"When dimming tunnel LED luminaires, the efficiency of the drivers decreases as the dimming depth increases - the relative losses in the power driver are greatest at the lowest flow rate (36% loss at 10% F/Fnom, 17% at 20% F/Fnom, 11% at 40% F/Fnom, 8% at 70% F/Fnom, 6.5% at 100% F/Fnom). Obviously, with the presence of several groups of luminaires, the number of luminaires in the group and the dimming levels of the luminaires of each group are obtained by solving an optimization task. In the report, an optimization task has been formulated and solved for specific tunnel entrance exposures with corresponding ordered luminance schedules L20. The target function is a minimum power loss in the drivers used at a given time flow schedule of the luminance L20.","PeriodicalId":241572,"journal":{"name":"2019 Second Balkan Junior Conference on Lighting (Balkan Light Junior)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116634002","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: 2
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