The Development Of A Smart Classroom System Based On The Internet Of Things

At present,the classroom in our country still have problems such as low intelligence level and inconsistent environmental standards.In order to solve this problem and improve the level of China's education modernization,the thesis has developed a set of smart classroom systems by summarizing the development experience of smart classrooms at home and abroad and combining China's national conditions.The paper first analyzed the development status of smart classroom systems at home and abroad.Discusses the significance of developing a smart classroom system in China.Then combining the national conditions of our country,we have formulated a practical and feasible plan.The smart classroom system includes hardware equipment and monitoring platform.The hardware part adopts a modular design concept and is divided into five parts: main control unit,wireless communication unit,infrared remote control unit,lighting control unit and power unit.Each unit cooperates with each other to realize the functions of the system.The main control unit realizes the detection and processing of classroom environment,control of curtains,exhaust fans,and communication with wireless communication units,human body infrared detection units,and light control units.The wireless communication unit uses the SIM900 a module to implement the SMS alarm function and the GPRS Internet access function,upload the environmental information detected by the main control unit to the database in POST mode and receive the control instructions sent by the monitoring platform and transmit the control instructions to the main control unit.The infrared remote control unit can realize the learning,storage and restoration of the infrared remote control code of the air conditioner.The infrared remote control unit uses the USART serial port to communicate with the main control unit.In order to realize the goal of “people enter the lights and people turn off lights,” this paper also proposes a new intelligent lighting control strategy:when the lighting control unit detects a student entering the classroom,the lighting control unit turns on a part of the classroom lighting.Then use classroom monitoring cameras to capture images in the classroom and switch lights on and off automatically according to the student's location.The lighting control unit can keep the light intensity within a reasonable range.In order to reduce the energy consumption,the light intensity control adopts the fuzzy control method.The monitoring platform is developed in PHP language and mainly includes the display of classroom environment information,air conditioning,lighting,curtains,and online remote control of the fresh air system.Database development using My SQL database platform.Database can store various collected environmental monitoring information inthe background.After the user logs in to the system,the user can realize real-time online viewing of the classroom environment information and video surveillance,and can realize the control and management of the device,thereby realizing the remote monitoring function of the classroom.The system realizes real-time monitoring and remote control of environmental information in classrooms.It can reduce the intensity of the teacher's work,provide an excellent environment for student learning,and meet the needs of school administrators to view the actual teaching situation.The system is installed and used at a certain school in Rizhao,which is stable in operation and meets the predetermined design goals.This smart classroom system is worth promoting across the country.