Intelligent Lighting Control System For Large Indoor Space Based On LoRa Wireless Sensor Network

Building lighting energy consumption has grown to be a significant portion of building energy consumption as industrialization and urbanization continue to accelerate.The corresponding energy demand is also rising year over year,which causes environmental pollution and energy consumption issues that need to be addressed more and more.Making the most of natural light and enhancing the visual comfort of the indoor lighting environment has become an important path for the development of intelligent and energy-saving lighting systems since lighting systems are directly tied to people’s lives.Traditional lighting systems do not utilize daylight to its full potential,indoor lighting is typically wholly artificial,when combined with consumers’ lack of energy-saving awareness,it is difficult to turn off the lights,resulting in a significant energy loss.Additionally,the majority of lighting systems require wired connections,which have certain management and maintenance issues.Due to limitations on transmission distance,laying expenses,and other factors,the standard wireless transmission technologies like Bluetooth,Zig Bee,and others are not well suited for use in lighting systems.Therefore,this thesis investigates and builds an intelligent lighting control system based on LoRa(Long Range Radio)wireless sensor network to address the issues with traditional lighting control system such as single function,complex maintenance and management,and minimal energy-saving impact.The following are the primary research findings:(1)The limitations and issues of the current technologies and methods for intelligent lighting are discussed,along with an overview of domestic and international research methodologies and the current state of the field.The overall design plan is finished after the functional needs and construction principles of the system are examined in light of the features of big indoor space lighting systems.(2)The packet structure,working mode for terminal devices,and network topology of LoRa wireless transmission technology are introduced.Based on the technical properties and common topology of LoRa,three distinct networking schemes are designed in this paper for various usage scenarios to meet the needs of the actual application.The network comprises of terminal nodes and centralized nodes with modules.The terminal nodes primarily gather and forward data,whereas the centralized nodes set up and manage the network and provide control orders.(3)The software program and hardware circuit for the intelligent lighting control system have been created.The hardware element of the lighting system is based on the functional requirements,and processor,sensor,dimming driver,Wi Fi,and storage modules are created together with the LoRa wireless communication,centralized node,and terminal node hardware circuits.Each module’s device selection,circuit design,and operating principle are described in depth in accordance with the criteria for the system design.The software component uses a modular design approach to make future debugging and customization easier.The centralized node and terminal node programs,which include the LoRa module program,Wi Fi module program,light acquisition program,and terminal lighting control program,are built in accordance with the hardware design to create a comprehensive software architecture.In finality,the system administration module is made so that the administrator may administer and maintain the lighting and sensor nodes in a unified way.(4)The intelligent lighting control algorithm based on fuzzy control is proposed,and the design process of the controller is elaborated,including determining the input and output,fuzzification,establishing fuzzy rules,fuzzy inference,and defuzzification.This is combined with the indoor intelligent lighting control strategy of natural lighting.In order to simulate the system and empirically validate it,a lighting simulation model is created.The findings demonstrate that the lighting system is capable of being dimmed in real time in response to variations in external daylight,demonstrating the system’s intelligence and energy efficiency,which is of considerable popularization and application value in public buildings like educational facilities.