Light Distribution Design and Simulation of LED for High Uniformity Illumination of Desk Lamp

针对台灯照明的高均匀性要求,设计一个自由曲面透镜对lEd光源进行二次光学配光。根据非成像光学理论,在已知入射光强分布与所需配光效果的前提下,建立关于透镜自由曲面面型的偏微分方程,并采用相应的数值解法,得到自由曲面面型数据。通过在建模软件rHInOCErOS中建立光学透镜的模型,并在TrACEPrO中进行光学仿真,得出仿真结果,验证此设计方法的可行性。According to high uniformity requirements of desk lamp lighting, a free curved surface lens is de-signed to perform the secondary light distribution of light emitting diode(LED) light source.Based on the theory ofnon-imaging optics, at the condition of known incident light intensity distribution and required light distribution effect,partial differential equations related to the shape of free curved surface are established.And corresponding numericalvalue algorithm is adopted to obtain the data of the shape of free curved surface.The models of optical lens are builtthrough simulation software Rhinoceros.And optical simulation is performed in Tracepro.The simulation results areobtained to verify the feasibility of the design method.福建省重大科技项目资助(2006H0092

LED Lighting Design of Underground Parking Lots Based on DILAUX

目前由于汽车的广泛普及,对城市的地下车库照明提出了更多的要求,但随着新一代照明光源lEd照明技术进一步的发展与完善,使得地下车库照明有了更节能、更环保、更经济的可能。在dIlAuX中建模57x33.3M2的中型地下车库,并利用dIlAuX计算软件对地下车库的lEd照明进行模拟、计算、优化,不断的调整灯具位置以及灯具间隔来到达最佳的照明效果,通过实景分析来探讨lEd在地下车库照明领域应用的可行性及其应用前景,并为地下车库照明提供一种设计上的借鉴。More requirements for the light system of civil underground parking lot lighting are concerned since cars are wildly-used nowadays.And it becomes possible to make the light system of underground parking lot more energy-saving,more environmental friendly and more economic as the new generation of LED technology gets more and more developed and improved.DILAUX is a kind of lighting calculation software,and it is used to model an underground parking lot with a medium 57 × 33.3m2and some simulations,calculations,and optimization on the LED light of the parking lot are also done by DILAUX.Therefore,constantly adjust locations and intervals of the lighting fixtures to achieve the optimal results.Furthermore,the feasibilities and application prospects of LED lighting applications in the underground parking lot field can also be explored through the real analysis.Overall,it shows an example to design the light system for civil underground parking lots.国家自然科学基金(61301009); 福建省重大科技项目资助(2006H0092); 福建省自然科学基金计划资助项目(2013J01252

The Research of Microstrip-Array on Automotive Collision Avoidance Radar Antenna and Planar-Lens Antenna

微带天线因为其工艺简单、价格低廉、易于集成、一致性好的特点，已经应用到越来越多的天线工程领域。本文主要研究了面向车载应用的微带天线，在车载防撞雷达阵列天线、平面贴片透镜天线、车载GSM/3G电子等方面进行了研究，并且进行了相应的加工测试，取得了较好的结果，在一定程度上提高了前人的研究成果。 在车载防撞雷达微带阵列天线的研究上，本文利用阵列理论对所设计的天线进行优化布局和激励综合，实现了波瓣的赋形和优化。仿真设计并加工测试了一款4*14的24G车载防撞微带阵列天线，实现了100°的波束扫描。 同时，本文还对平面贴片透镜天线进行了研究，该天线运用微带技术所设计，采用一种单元结构在|S21|≥-...Microstrip antennas have been applied to more and more fields because of their ease in integration, low price and good stability and consistency. This thesis introduces my research in microstrip antennas, especially in automotive anti-collision radar antennas, lens-array antennas and automotive GSM/3G antennas. I have improved the performance of these antennas. I will introduce a 4*14 automotive...学位：工学硕士院系专业：物理与机电工程学院_电磁场与微波技术学号：1982011115284

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel

JUNO sensitivity on proton decay p → ν K + searches*

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this study, the potential of searching for proton decay in the $p\to \bar{\nu} K^+$ mode with JUNO is investigated. The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits suppression of the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar{\nu} K^+$ is 36.9% ± 4.9% with a background level of $0.2\pm 0.05({\rm syst})\pm$$0.2({\rm stat})$ events after 10 years of data collection. The estimated sensitivity based on 200 kton-years of exposure is $9.6 \times 10^{33}$ years, which is competitive with the current best limits on the proton lifetime in this channel and complements the use of different detection technologies

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors