Design of White LED Energy-saving Street Lamp

An energy-saving light-emitting-diode(LED) street lamp was conducted. Based on the simulation by optical software TracePro,a physical street lamp system including 600 white LEDs was achieved. This system was operated under a constant current of 20 mA for each unit,and the electric power consumption of the whole lamp was only 42 W. Experimental results demonstrated that the total average illuminance reached 8.8 lx and the overall uniformity was 0.370 for a 30-m-long and 10-m-wide test area at a height of 8 m,which is fully acceptable for the current standard for sub-main road.

Research on the Application of Green Lighting Technology in Sports Lighting

With China’s continued development of society and economy, the importance of ecological environmental protection is growing. This protection has become an indispensable part of social development. The use of various green environmental protection equipment can effectively promote ecological environmental protection and reduce the adverse effects of human activities on the environment. In the field of sports lighting equipment in China, traditional lighting methods constitute an inherent danger to the environment, leading to a waste of valuable resources and environmental pollution. This study involves a multi-tile-multifunctional-function controller, which effectively solves the control problem of the control light. In the sports lighting group, the high and low-level lighting of the sports lighting group, and adjust the light from the height highly effectively to adjust each height. The low-shot mode reduces the power consumption of the system by about 33% to 60%, which significantly helps energy saving. By optimizing the performance of the lighting system, promoting the preservation of power resources, reducing the adverse effects of pollution caused by equipment utilization and energy waste, and promoting the harmonious cohabitation of human and natural environment. .

Radiation of lamp and optimized experiment using artificial light in the Arctic Ocean

A winter optical experiment by an artificial lamp was conducted in the Amundsen Bay of Arctic Ocean from November of 2007 to January of 2008. The radiation field emitted from an artificial lamp was measured and is introduced in this paper, and the optimized experiment project is discussed. It is demonstrated that the minimum size allowed of the lamp is determined by both the field of view （ FOV ） of optical instrument and the measuring distance from the lamp. Some problems that might influence on the experiment result often occur for a simple fluorescent lamp, such as instability, spatial nonuniformity, light divergence, effect of lamp temperature, etc. By the analysis of the light radiation, three kind of measures are proposed to control the quality of the experiment, i.e. keeping consistency of lamp size with FOV of instrument, calibrating in situ downwind, and conducting measurement in effective range. Among them, the downwind calibration is the key step to overcome most problems arose by the lamp. The experiment indicated that the reliable results can be obtained only when the optical measurement is coordinated with the radiation field of artificial lamp. The measured radiation property of the lamp was used to advise the field experiment to minimize measuring error. As the experiment by artificial lamp was the first attempt in the Arctic Ocean, the experience given by this paper is a valuable reference to the correlative studies.

Study on Segmented Reflector Lamp Design Based on Error Analysis

This paper discusses the basic principle and design m ethod for light distribution of car lamp, introduces an important development: h igh efficient and flexible car lamp with reflecting light distribution-segmente d reflector (multi-patch) car lamp, and puts out a design method for segmented reflector based on error analysis. Unlike classical car lamp with refractive lig ht distribution, the method of reflecting light distribution gives car lamp desi gn more flexibility. In the case of guarantying the lightness of car lamp and sa tisfying the standard demand for the light distribution, the design of the exter ior of the car lamp has more freedom. The high gradient of car lamp is more suit able for the demand of streamline of the car exterior. The shape of segmented re flector obtained by theory calculating of car lamp reflecting light distribution is only an ideal shape, which usually has considerable differences with the fin al shape and will influences light distribution. There exist difference between the calculated reflector and manufactured reflector. Owing to light reflecting c haracter, the small diversification of the reflector will reduce the big diver sification of the light distribution shape on light distribution screen in 25 -meter place, so light distribution quality can’t be ensured. To ensure the re flector by light distribution calculation accordance to reflector by practical m anufacture, the error effect of surface shape must be reasonably considered name ly the error effect of manufacture tache. The paper establishes error-analyzing model for segmented reflector according to the analysis of error of making proc ess for segmented reflector. Based on this error-analyzing model and by use of the analyzing software developed for segmented reflector light distribution, it could reasonably consider reflector errors made by manufacturing, such as reflec tor surface spray-painting and plating aluminum, which could give out shapes of reflector patches for segmented reflector well and truly, and direct the plan o f making process efficiently. The method put by the paper has successfully appli ed to develop segmented reflector lamp for several type cars and obtained good e ffect for the factory.

Design, Manufacturing ＆ Evaluationof Solar Tubular Lamps Using Optical Reflectors

The aim of this research is to find the best way to take advantage of solar radiation in the lighting of sites to reduce reliance on electric power So In this paper, design and implementation of a pipe lamps contain optical reflectors where three types of adoption of the lamps are different diameters and lengths with reflectors visual reflect solar radiation by 84% and tested practicable ＂in the laboratory room dimensions using Lux Meter device and enter the data in the program （surfer） the fee distribution of the intensity of radiation in the room laboratory ratios has been found that the intensity distribution of light inside the room are adversely affected＂ with the decrease in diameter of lamp At less intensity in half at reducing the tube diameter by 25% and increases with tube diameter, and vice versa for the impact of length where the intensity is light distribution higher when the lamp is tubular Short at the intensity of the radiation increases by 20% when you reduce the length of the tube in half, as well as show that weather factors such as dust and clouds adversely affected to the efficient functioning of the lamps and the intensity distribution of light in the room.

Sidelights of Mr.Rong's Great World:An Exhibition on Rong Geng's Donations

Mr.Rong's Great World:An Exhibition on Rong Geng's Donations opened at the National Art Museum of China on November 3,2020.The works on display included about 300 pieces of calligraphies,seal cutting works,stone and bronze rubbings,manuscripts,letters,seals and documents donated by Rong Geng and his family.

The design of Landscape lighting Based on wind, light, water and other green energy

Taking the ecological, environmental protection as the starting point, in view of our country road lighting with excessive power consumption problems, the paper proposes design scheme of S type spiral lamp that is suitable the coastal city, highway zone by solar energy combined with wind energy generation. This design uses class of S spiral with the highest wind energy utilization rate, and the surface has materials that can absorb solar energy, its structure built in simple and the design fit standard proportion lamp. This design has the advantages of beautiful apnearance, easv to produce, has the very big use value.

Development of the Operating Circuit for a LED Lamp Based on the Cockcroft-Walton Circuit

The operating circuits for LED （light emitting diode） lamp composed of diodes and DC capacitors only are proposed. The proposed circuit is based on a double-voltage rectifier circuit and a Cockcroft-Walton circuit. The circuit can operate LED without flicker, and is free from switching noise since high frequency switching circuit is not used. To replace an AC capacitor by a DC capacitor for the ballast, a diode is connected across the capacitor in parallel, and the operating voltage of LED unit is kept at the value greater than the peak voltage of the input power source. The circuit realizes high efficiency and high input power factor compared with the operating circuits on the market. Cockcroft-Walton-type circuit can operate many LED devices in series connection. Series connection is preferable for fabricating LED unit of a constant voltage characteristic. Moreover, fairly flat waveform of LED operating current is realized by Cockcrofl-Walton-type circuit, even though capacitor ballast is used.

Reliable Energy Strategy Based on Incandescent Lighting

The artificial lighting used today in home and workplace have confirmed capability to induce skin problems, DNA damage, tumor formation as well as worsening arthritis, migraine and visual fatigue by longer exposure of ultraviolet radiation from discharge lighting sources. In this paper an ignition-angle controller (IAC) is used to demonstrate the reliability of incandescent lamps (ILs) in comparison with discharge lighting feed by switching-mode supplies. Analysis of harmonic of the line-current flow consumed by the ignition-angle controller (IAC) circuit has shown that production of distorted rms currents does not produce hazard, because single harmonic distortion (SHD) values are keeping lower to 50%. As energy policy, the modern artificial lighting must be replaced by economical, stable and nonhazardous incandescent lamps (ILs).

Application of LED Type Lamps in Domestic and Public Utilities and Gain Capability to Run New Small Investments in Rwanda

The Rwandan State-run Energy Water and Sanitation Authority Company (EWSA) is rapidly increasing the number of population having access to electrical power energy. 30% of electrical energy is used in lighting. The incandescent bulbs, compact fluorescent lamp bulbs as well as fluorescent tubes are mostly used to convert electrical energy into light. The said light sources have many disadvantages such as excessive power consumption leading to giant bills of electricity, short life span leading to continuous replacement of lamps, and emission of CO2. Application of light-emitting diode (LED) lamps in lighting in long term suppresses the aforementioned problems resulting into saving of money that will be used for running new small investments.

温室园艺LED照明研究与应用现状

LED作为设施园艺光环境调控的优选光源和手段,节能、精准、长寿命且光效率高,可通过光质及其光强和光周期等光照属性的控制,调控植物光合作用和光形态建成,调节设施园艺作物生长发育、生物量和果实产量、开花及农产品品质,获得温室补光的效益。而且,基于时空光环境调控带来的显著效益,动态照明和立体照明应运而生,方兴未艾,应用前景广阔。本文总结了温室LED照明产品和应用领域,提出了动态照明和立体照明技术概念,总结了光质、光强和光周期植物调控的研究进展,重点阐述了光质调控植物园艺作物生长发育、产量、开花及农产品品质的研究进展,对未来温室LED补光产业发展前景进行了展望。

ENERGY STAR Lamps V2.0新版标准变化分析及应对措施

简单介绍了能源之星计划,重点阐述灯类产品能源之星标准Lamps V1.1版和V2.0版本的差异。通过分析,帮助企业了解新旧标准的变化及带来的影响,掌握面临的挑战和机遇。

基于绘画观赏视角的展陈光环境研究

为研究基于绘画观赏视角的展陈光环境参数,本文从参观者视觉体验和需求出发,在主观感受层面讨论绘画视觉外观的影响规律并提出分析工具。通过对山水、人物、花鸟类国画的研究发现,3000~5600 K色温展陈光环境更受偏爱,观赏效果与色温高低显著相关;照度50~300 lx时,国画观赏效果与照度显著相关,最佳色温照度组合为5600 K-300 lx。3000 K-50 lx光环境下较低反射率的背景和5600 K-50 lx光环境下较高反射率的背景都能提高观赏效果;3000 K-50 lx光环境下,国画展品的“可见性”和“质感”与展陈背景颜色深浅度相关;5600 K-50 lx光环境下,仅国画展品的“质感”与展陈背景颜色深度相关较强。

PE-LLD散光膜氙灯加速老化行为及机制

农用聚乙烯散光棚膜可在较高透光率条件下提高雾度,将透过膜面的直射光转为散射光,促进膜内植株全维度获取有效光辐射。通过引入散光剂制备线型低密度聚乙烯(PE-LLD)散光膜,实现透光率90.99%、雾度62.29%,较空白对照膜透光率降低0.55%、雾度提高152.60%。耐老化性能是PE-LLD棚膜其他功效性能的基础保证,采用氙灯老化对PE-LLD散光膜进行加速降解,其宏观光学与力学性能变化趋势同空白膜一致,二者断裂伸长率分别在13d时降至初始值40.58%与47.01%(完全老化)。综合考察PE-LLD散光膜加速老化过程化学组成、结晶行为、晶粒尺寸及微观形貌变化规律,其老化过程随降解速度变化分3个阶段:老化前期分子链交联密度上升,二次结晶片段堆砌增大结晶度,降解缓慢;老化中期交联与降解并存,界面处散光剂脱落促使膜面破裂,片晶分布连续性降低,降解速度适中;老化后期分子主链降解加剧,膜面裂纹向纵深延展,力学性能快速降解至完全老化。研究表明,引入散光剂可在不影响PE-LLD棚膜宏观使用功能与老化降解性能的基础上有效提高雾度,实现散射光调控。

一种可调光放大无影观察灯的设计及在病理组织包埋中的应用

为提高病理诊断与临床诊断的符合率,设计一种可调光放大无影观察灯。该观察灯采用高亮度发光二极管(LED)自然光作为光源,运用脉宽调制(PWM)调光器进行电子调光,主要构成包括发光系统、光学放大镜、PWM调光器、电子镇流器、磨砂放散光灯罩、万向鹅颈管等。经实际应用证明,该观察灯设计合理、操作简单、安全性好、无交叉污染,将其应用在病理组织包埋中,可全方位多角度观察且选材准确,有利于提高病理诊断率。

智慧路灯的建设风险研究

智慧城市已经逐渐成为社会生产发展改革的代名词,而智慧路灯也成了当代户外集成化智慧产品,建设内容上融合了网络、AI、智能化、3D等多种元素,专业的融合性较大,建设工程已不再是单纯考虑进度、配电、施工质量等传统风险因素,风险因素不断转变增加,增加了整个工程建设风险。本文将对智慧路灯的建设风险进行识别、评估与应对,应用工作风险分解法(WBS-RBS)、层析分析法(AHP)、模糊分析法(FUZZY)对风险进行识别与评估,最终提出风险应对方案,为今后智慧路灯的建设提供一定的风险管理借鉴。

基于航班信息的机坪智慧照明监控系统设计方案探讨

随着国家“双碳”战略深入推进和“四型机场”建设广泛开展,各机场持续开展技术创新,传统的民航机场机坪照明监控系统是以RS485通讯总线方式实现高杆灯按照分区分组、光控与时控等模式的单系统照明,其控制方式简单、系统可靠性不高、智慧化程度不足、节能效果有限,已难以适应新时代照明需求。文章立足行业实际,充分借鉴有关机场照明系统建设方面的经验,提出了一种基于航班信息的机坪智慧照明监控系统方案,用数据联动实现机坪与机位按需照明,最大程度地节能减排,助力绿色机场发展。

3种诱捕方式对河南漯河亚洲玉米螟的诱捕效果

为探索农业主要害虫亚洲玉米螟Ostrinia furnacalis(Guenée)的有效监测方法,于2022年和2023年利用测报灯、探照灯和性诱剂诱捕器对河南漯河亚洲玉米螟田间种群进行了监测及种群动态分析。结果表明:测报灯、探照灯和性诱剂诱捕器均能诱捕到亚洲玉米螟成虫。2022年和2023年测报灯诱捕虫量分别为6767头和3854头,探照灯诱捕虫量分别为6019头和9666头,两种灯下亚洲玉米螟成虫种群消长动态均出现2个明显的高峰期,且均在5月中旬至6月上旬和8月上旬至9月中旬,其中,第1个高峰期虫量占当年诱虫总量的6.60%~26.60%;第2个高峰期诱虫数量较多,虫量占当年诱虫总量的64.22%~90.58%,该时期内均出现多个峰值,单日最高诱虫量出现在9月上旬。2023年1个性诱剂诱捕器诱捕虫量为252.67头,明显低于同期灯诱虫量,但在5月中旬至6月上旬可见明显的诱虫高峰。2023年3种诱捕方式下亚洲玉米螟的始见日均在4月中旬,性诱终见日(9月下旬)比灯诱终见日(10月中下旬)早。该研究结果可为亚洲玉米螟的预测预报和绿色防控提供参考。

高功效LED集鱼灯制作工艺流程的分析

光诱渔业具有巨大的市场经济效益,尤其是远洋灯光捕捞业体量巨大,渔船数量众多,集鱼灯作为重要的助渔装备之一,实现快速高效集鱼功能。随着新技术的更新与介入,LED集鱼灯(发光二极管集鱼灯,Light Emitting Diode Fish Lamp)是未来渔业装备与工具中最重要的研究方向。LED集鱼灯相较于金卤灯优势巨大,未来LED集鱼灯逐步取代金卤灯是必然趋势。研究通过前期比较,开展外观设计与基本参数设定,通过SMT(表面贴装技术,Surface Mounted Technology)车间工艺和生产组装车间工艺等设计研究方法,制作出了高功效LED秋刀鱼集鱼灯,并完成对生产成品多层质量检测,高功率和组装式集成模块的设计,使产品更具备发光高效性和容错率。但LED集鱼灯仍在多个交叉学科面临诸多难题,包括散热、安装、集鱼效果等方面需要投入更多的精力去研究。

基于全光谱多通道LED混光控制系统的设计

在设施农业生产中,为提高LED植物光源的混光调整精度和补光效率,该文设计了一种基于多元控制策略的LED植物光源智能控制系统。本系统采用一种基于红、蓝和白3种芯片集成LED灯珠,通过仿真设计获得了线性光源的灯珠阵列最优排列,提高受照面上光照度的均匀度。采用可调恒流和脉冲宽度调制结合的方式设计了一套多元控制的LED植物光源调控模组,实现光质的多通道驱动独立控制。通过实验结果表明,本套智能调控系统的调光精度达到98%以上,且当占空比达到80%时系统驱动效率达到90%。本研究结果可实现按植物生长所需精准调控光质配比、光量子通量密度的同时,也提高了光能利用效率,具有节能降耗的效果,为植物人工光源的精准调控提供了参考,具有广泛的应用价值。