Remote Control Physics Experiment System

With the rapid development of technology,there is an increasing demand for diversified teaching methods in higher education experiments in China.The traditional experimental teaching method is limited by time and space,and cannot meet the needs of modern education.At present,online experiments in major universities mainly focus on simulation experiments,but the experimental results are all simulated values,which have relatively poor authenticity,making the experimental teaching effect unsatisfactory.In addition,how to leverage the advantages of online experiments and provide users with a good interactive experience is also a practical issue that needs to be discussed.This article takes the scarcity of online remote control experimental teaching resources and the lack of authenticity in virtual simulation experiments as the starting point,and designs a remote control experimental system based on Lab VIEW.By analyzing the advantages and disadvantages of Browser/Server and Client/server architectures,an overall design was carried out based on the former as the basic architecture.The remote control system is divided into three parts: server,experimental platform,and user interface.The server is divided into a Web server and a video streaming server.The Lab VIEW Web server includes HTTP method resources,ACCESS database operation,and instrument control functions to realize the system’s response and control.The video streaming server is developed based on Qt and uses TCP protocol for data transmission to achieve video monitoring function.Three classic university physics experiments,including light polarization,equal thickness interference,and measurement of sound speed,were selected as experimental objects.Instrument control was achieved through STM32 series products.For different functional requirements,device selection was completed,and PIN photodiodes,DDS chips AD9854,and high-speed AD9220 were chosen to replace the functions of optical power meter.After the development was completed,various tests were conducted.Users with different identities tested the system’s management function modules and conducted repeated tests on the three experimental modules.Among them,the test results of the light polarization experiment showed a high fitting degree with the expected curve of Mariotte’s law formula;the test results of the equal thickness interference experiment showed that the error between the measured Newton ring radius and the true value was within 2.5%;the sound speed measurement experiment was conducted using two methods of resonance interference and phase comparison,and the measured results were not more than 1% different from the standard sound speed at the current room temperature.These test results also proved the feasibility and superiority of this design.