The Design And Development Of Energy-saving Power Consumption System In Wisdom Classroom

With the improvement of industrialization level and the vigorous development of education in our country,the number of teaching buildings and new school districts in domestic colleges and universities is increasing constantly.At the same time,the demand for electrical energy such as lighting,air conditioning and other electrical equipments at school is also increasing rapidly,and the outstanding problem that comes with it is that the loss of electrical energy caused by improper use is also getting worse.Under the background of the country’s vigorous promotion of energy conservation and emission reduction,which addresses the problems such as the "Changming lamp" phenomenon currently in the use of classrooms in the school and the unfavorable situation of manual management and even maintenance of electrical equipment in buildings by property managers and so on,this paper studies how to realize the manual and automatic systemic control and management of lighting,air conditioning and other electrical equipments in classrooms,and put forward a set of detailed design plan,in which there are some kinds of terminal equipment that takes STM32F1 series single-chip microcomputer as the core controller,uses high-precision professional metering device to collect the working state of electrical equipment and uses excellent performance sensor to monitor the change of the environmental state parameters,after that all these terminal equipment in the building are networked through RS485 wired communication or radio frequency wireless communication,and then connected to the "cloud" through gateway devices such as local servers or intelligent data terminals,in order to the realization of remote,centralized,systematic and intelligent supervision for lighting,air-conditioning and other electrical equipment in classrooms of several buildings and even entire school district.The design scheme has particularly prominent advantages in reducing costs and energy efficiency.In this paper,the master node and the slave nodes are used to cooperate with each other to form a network.and the real-time monitoring of lighting and air conditioning equipment is realized through the two-way communication between the master node and multiple slave nodes.In the elaboration,the design process is taken as the main line,and the design process of each module in the management system is described from the aspects of hardware circuit design and software program design,that is,from the Construction design of hardware circuit to the writing and simulation debugging of software program code to realize the required design objectives and functions.In the aspect of hardware,the controller of each module in this system is based on STM32F1 series single-chip microcomputers,and according to the application mode set by each module,to realize functions of power parameter measurement,wired communication,wireless data transmission,near-infrared control,monitoring of changes in environmental state parameters,and malignant load judgment respectively.These modules which can be coordinated cooperate easily with the remote server to monitor the local lighting and air conditioning equipment in real-time and unattended.In this paper,the design process of the control circuit is described in detail,including lighting and air-conditioning control circuit,sampling metering circuit,RS485 wired communication circuit,wireless data transmission circuit and environmental data monitoring circuit.And In terms of software,the design mainly focuses on the program design of electric energy metering,wired communication,wireless digital transmission,lighting control,timing control and malignant load judgment and more.While re-selecting the energy acquisition design scheme and optimizing the related design circuits for the electromagnetic compatibility and other problems that may exist in the power frequency environment in the hardware circuit design,In order to coordinate with the application of all-phase data processing,triangular self-convolution window and other methods in the application of professional metering chips,the energy metrology algorithm in software design was adjust-ted to improve the high precision,high stability,strong anti-interference and adaptability to the complex power frequency environment of the designed electronic energy metering products.Relying on the stable and reliable modular products and the booming Internet of Things(IOT)technology,a remote monitoring system is constructed on the cloud server in the form of “database and webpage”,which enables this energy-efficient electricity system for lighting and air-conditioning equipment have the advantages of strong expansibility,high flexibility,remote interoperability and supervision,personalized situational mode application,diversified network architecture,efficient data throughput,etc.,It can meet the requirements of centralized and flexible management and control of classroom lighting and air-conditioning equipment based on the curriculum schedule,and also provide personalized scenario customization and even be reused according to special environment or special requirements put forward by the school,which can achieve the purpose of energy saving to a great extent,and has a very high value of market application and promotion.