Abstract:The national standard GB/T 30117.4-2023,"Photobiological safety of lamps and lamp systems-Part 4:Measuring methods"is equivalent to IEC TR 62471-4:2022 and specifies two measurement methods for evaluating the photobiological safety of lamps and lamp systems(Class A high-precision laboratory method and Class B portable instrument estimation method),as well as practical methods for radiance and spectral radiance measurements.The article introduces the background and scope of application of the standard,and provides an in-depth analysis of the principles,operational steps,and instrument requirements of the measurement methods,combined with the core tables of the standard.It also discusses the impact of the standard on related industries and implementation suggestions,aiming to help relevant personnel better understand and apply the standard and enhance the photobiological safety level of lamps and lamp systems.
Abstract:This paper focuses on smart grid adaptation for integrating power equipment and lighting systems.It develops multi-dimensional collaborative control logic,a dynamic load response scheduling model,and a heterogeneous equipment interaction protocol system,and proposes energy efficiency collaborative optimization algorithms,hierarchical safety protection,and modular elastic expansion paths.The research provides theoretical support for improving grid resource utilization,system security and scalability,and is practically significant for promoting smart grid integration and application.
Abstract:In the process of continuous upgrading and transformation of modern manufacturing,the lighting environment,as a fundamental physical condition for industrial production,its scientific design level affects operational efficiency and occupational health.Traditional industrial lighting systems often focus more on ensuring basic visibility,neglecting the combined influence mechanism of light source characteristics on human physiological rhythms,visual recognition ability,and long-term operation tolerance.This can easily lead to systemic risks such as accumulated visual fatigue,increased operational error rates,and hidden labor depletion.The in-depth application of ergonomics theory in industrial scenarios requires the construction of lighting intervention models that are precisely adapted to human perception characteristics,task requirements,and environmental elements,in order to achieve effective collaboration among the human-machine-environment system.Therefore,this article conducts a scientific discussion on the lighting science and ergonomics analysis in industrial production,hoping to provide guidance for the construction of a high-quality,efficient and human-oriented modern industrial lighting system.
Abstract:With the maturation of the Internet of Things technology,the field of smart home has gradually become a hot topic.As an important part of the home environment,the intelligent transformation of lighting system has become an important direction to promote the development of home.For this purpose,this paper designs and implements a hierarchical distributed intelligent lighting control system.The system collects environmental information through the lighting in the perception layer and dual-technology sensors.The control layer with the ARM Cortex-M4 core operates PID and fuzzy algorithms to drive the dimming module and the sunshade louver of the stepping motor in the execution layer,achieving precise on-demand control of lighting.The study combines a 50-square-meter office area case to compare the energy consumption performance of three solutions:traditional,induction,and this system.Compared with the traditional long-burning lamp mode,it effectively improves the lighting quality and efficiently utilizes energy.
Abstract:With the continuous improvement of venue lighting requirements for large-scale sports events,the renovation of existing venue lighting has become a key link to meet the needs of events and enhance the comprehensive functions of venues.This article takes the gymnasium of South China Agricultural University as the research object,combined with the lighting requirements of the 15th National Games and the Paralympic Volleyball Tournament in 2025.By analyzing the current lighting situation before the venue renovation,comparing the renovation design plan with the actual inspection results,the core strategy of lighting renovation for existing venues is systematically studied.Research has shown that the renovation needs to focus on the lighting standards for sports events,and promote it from four dimensions:optimization of lighting parameters,equipment selection and adaptation,construction of intelligent control systems,and meeting the special needs of disabled and special Olympic events.At the same time,it should also take into account the multifunctional utilization and energy-saving benefits after the renovation.After the renovation,all lighting indicators of the venue have met the requirements of Grade V(TV broadcasting of major international competitions)in JGJ 153-2016"Design and Testing Standards for Sports Venue Lighting"and relevant specifications for the construction of National Games venues,providing reference for the lighting renovation of similar existing venues serving large-scale events.
Abstract:Aiming at the operation and maintenance problems of industrial lighting system in complex light environment of high-end manufacturing workshop,this paper proposes a fault prediction and health management method based on digital twin technology.By constructing a digital twin model containing electrical parameters and light environment characteristics,the real-time perception and health assessment of luminaire status are realized,and a health score-driven active maintenance strategy is developed.The case application shows that the fault prediction accuracy of this method is significantly higher than that of the traditional method,the residual life prediction error is less than 5%,the downtime is reduced by about 50%,the lamp life is prolonged by about 15%,and the system stability is significantly improved.
Abstract:This study aims to clarify the current state of research,key topics,and developmental trajectory within China's lighting design field.Using China National Knowledge Infrastructure(CNKI)as the data source,a search strategy targeting papers titled"lighting design"yielded 811 relevant documents.Bibliometric methods and VOSviewer software were employed to construct a knowledge map of this domain,analyzing trends across four dimensions:publication patterns,thematic distribution,keyword co-occurrence relationships,and the evolution of research hotspots.Results indicate that domestic lighting design research has exhibited phased development since 1992,entering a rapid growth phase after 2010.Research themes remain highly concentrated on core directions such as lighting system design,intelligent lighting,and energy-saving technologies.Keyword co-occurrence networks form three major clusters:"Technological Foundations-Application Scenarios-Performance Optimization."Recent research hotspots have progressively shifted toward intelligent control systems,in-depth applications of LED technology,and green energy-saving approaches.Finally,based on the network characteristics,this study proposes future research directions for China's lighting design field,providing reference for both academic research and practical applications in this domain.
Abstract:With the continuous expansion of urban and industrial production scale,it is difficult to find the slow aging problem of lights in real time by relying on the traditional manual inspection mode,nor can it be perceived immediately when the fault occurs,which not only has public safety hazards,but also leads to energy waste.Therefore,this paper mainly discusses how to extract brightness and color temperature parameters through image processing algorithms,and how to train the model to identify brightness attenuation,color temperature deviation,flicker,lamp damage and other faults;At the same time,aiming at the environmental interference and other problems encountered in practical application,the optimization strategy is put forward to promote the long-period,unmanned and refined intelligent operation and maintenance of lighting facilities.
Abstract:Focusing on the energy-saving goals of high-performance building lighting systems,this paper systematically analyzes the composition and dynamic characteristics of lighting loads.It establishes an optimized design model based on illuminance standards and functional zoning,and proposes a multi-strategy collaborative control approach incorporating time scheduling,light-sensing dimming,and occupancy detection.Field experiments confirm that these strategies effectively reduce per-unit-area energy consumption and unnecessary operating time,providing technical support for the intelligent upgrading of building lighting systems.
Abstract:Frequency fluctuations during primary frequency regulation of thermal power units significantly impact the reliability of on-site lighting systems.Through an analytical study of the lighting system in a 660MW ultra-supercritical unit,a frequency-lighting coupling mechanism model was established,and a comprehensive regulation scheme based on adaptive parameter optimization was designed.Test data indicate that when frequency deviation exceeds±0.1Hz,voltage fluctuations in the lighting system increase by 15%,and the failure probability of LED drive devices rises by 8%.After implementing the optimization scheme,lighting system reliability improved by 12%,equipment failure rates decreased by 18%,and annual operational and maintenance costs were reduced by 250,000 yuan.This research provides technical references for enhancing the operational reliability of lighting systems in thermal power plants.
Abstract:With the acceleration of urban informatization,the large-scale deployment of outdoor LED displays has exposed two major challenges in traditional manual operation and maintenance(O&M)and offline playback control models:low management efficiency and significant security risks.To address these issues,this paper designs and implements a system comprising an integrated management platform for remote maintenance and content updates of LED displays.The system employs a cloud-edge-device collaborative technical architecture.It utilizes an intelligent terminal controller with ARM+FPGA heterogeneous computing capabilities to achieve real-time sensing of display microenvironment parameters and deep-level control of underlying hardware.A lightweight MQTT communication protocol was designed to address high-concurrency access from numerous terminals in weak network environments.Software-wise,a comprehensive management system was established,incorporating intelligent fault diagnosis,multimedia content orchestration,and multi-level security review.
Abstract:The proposal of China's"dual carbon"goals has determined the sustainable development direction of China's construction and building use.As an important component of total building energy consumption,lighting energy consumption directly affects the progress of achieving the"dual carbon"goals.Based on practical engineering experience and combining computer technology with intelligent control methods,this paper conducts multiple sets of lighting energy-saving retrofitting practice verification by investigating the current status of lighting energy consumption and energy-saving needs in typical scenarios such as commercial buildings and public buildings.Three typical scenarios were selected for retrofitting:a 150000 m2 large commercial complex,a 92000 m2 office building,and an urban underground parking lot.The results show that the comprehensive application of LED high-efficiency lighting and intelligent control system energy-saving technologies can reduce building lighting energy consumption by 35%to 60%,corresponding to a 28%to 45%reduction in carbon emissions.The research findings provide actionable practical paths and data support for the construction industry to achieve the"dual carbon"goals through lighting energy-saving technologies.
Abstract:To enhance the fire safety level of long-distance water diversion project gate stations,this paper explores the feasibility of applying intelligent fire emergency lighting and evacuation indication systems.The article explains the core functions of the system in complex gate station environments and compares it with traditional systems through simulated applications and comprehensive analysis,examining its advantages in response time,evacuation accuracy,and efficiency.It verifies the system's high reliability and practical value,providing a reference for the intelligent fire protection construction of long-distance water diversion project gate stations.
Abstract:Based on urbanization process and the concept of"Dual Carbon",this study,grounded in the specialized field of"landscape lighting"within municipal illumination and guided by the low-carbon concept,thoroughly examines the non-low-carbon issues prevalent in current landscape lighting of urban waterfront spaces.Building on this analysis,a systematic optimization framework for energy-saving technologies in waterfront landscape lighting is developed,encompassing three dimensions:systematic energy-saving strategies,intelligent control technologies,and the application of green materials and energy sources.This integrated system aims to achieve a harmonious balance among artistic appeal,functional performance,and environmental sustainability in waterfront nightscapes,thereby providing both theoretical reference and practical pathways for future low-carbon waterfront lighting projects.
Abstract:A 110 kV substation high-voltage capacitor bank set experienced serious harmonic pollution during operation.Harmonic currents generated by LED lighting equipment caused the device to overheat,produce noise,and reduce the power factor.By analyzing the load characteristics of LED lighting equipment using harmonic source identification detection technology,studying the harmonic propagation mechanism with device harmonic response analysis technology,and designing a mitigation plan using LC filter compensation technology,a systematic harmonic mitigation project was implemented.
Abstract:To optimize energy efficiency management,this paper has developed a substation lighting control system based on AI perception and adaptive algorithms.Through the collection and fusion of multi-source sensor data,a high-precision environmental perception module is constructed.Combined with deep learning and fuzzy control,a lighting hierarchical control strategy is designed.Additionally,a dynamic power regulation and energy efficiency closed-loop control module is also designed to ensure the optimal energy efficiency of the system in complex environments.The system also achieves adaptive regulation through reinforcement learning and fuzzy control.Through simulation platform testing and field application verification,the results show that the system exhibits excellent performance in terms of energy efficiency,power stability,and response speed,providing an effective solution for energy efficiency management in smart grids.
Abstract:Under the background of the implementation of the national"dual carbon"strategy,the construction of green hospitals has become an inevitable trend in the development of the industry,however,at present,the traditional single light management method is often difficult to coordinate the medical environment unique light demand and energy efficiency of the contradiction between the situation,so the long light,ineffective lighting and other electrical energy waste phenomena are common.Long lights,ineffective lighting and other electrical energy waste phenomenon is common,which not only increased the economic burden of the hospital and to some extent limit the logistics operation towards refinement and intelligent direction of the pace of change.Therefore,this paper discusses the specific practice path and optimization strategy of lighting energy-saving control in hospital electricity management,and expects to provide useful theoretical references and applications for the construction of high-efficiency,low-carbon power operation system for medical institutions.
Abstract:In order to solve the driving safety problems caused by the sudden change of light in the entrance and exit of highway tunnels,the risk mechanism of lighting transition defects is analyzed with lighting transition optimization as the core,combined with the dynamic change characteristics of the light environment and the driving visual cognitive law.By constructing a multi-parameter coupled transition segment lighting model,the dynamic light emphasis section control strategy is designed to form a sub-scene lighting transition optimization scheme.The research results can provide theoretical support for the design of tunnel entrance and exit lighting system,which is of practical significance for improving the safety of highway tunnel traffic.
Abstract:For road lighting,we propose an efficiency-decomposition and Tj–efficacy–lifetime derating model for High-voltage GaN-based LEDs,co-optimizing chip terminal design/current spreading,low-thermal-resistance packaging and heat paths,low-ripple electrolytic-free drivers,and multistage surge protection.A/B comparisons and accelerated tests followed IEC and LM-80/TM-21.Under a unified protocol,system luminous efficacy improves by 8%～12%(P50)over baseline;PstLM≤1.0 and SVM≤0.4 across 10%～100%dimming;surge withstand reaches 10 kA(line-to-ground)and 5 kA(line-to-line)with self-recovery;L70/B50 projections increase by 20%～30%;thermal derating is controlled;LCC/TCO decreases by 8%～15% and payback shortens by 10%～20%.
Abstract:This paper presents a hybrid off-grid power system integrating PV,storage,and diesel generation for field operations.It addresses component selection,energy management,an intelligent dimming algorithm,and a PV-storage-diesel coordination strategy,supplemented by a DC microgrid for sensitive loads.Tests confirm enhanced efficiency and reliability,offering a practical green energy solution for remote sites.