Design And Implementation Of A Data Acquisition System For DC Active Cloaking Device

In recent years,the research on invisibility cloaks has attracted the attention of domestic and foreign scientific researchers.First,passive cloaks based on the theory of transform optics has been developed rapidly.Subsequently,active cloaks have been quickly proposed with there own unique advantages.In the case of direct current,the two cloaking methods need to obtain the potential distribution of the entire material during the experimental verification,which is often realized by hand.For this reason,we design a data acquisition system to achieve experimental verification of active cloaking in this thesis,which is based on the Laplace's equation and active cloaking theory.The main content of this work is as follows.According to the principle of active cloaking and experimental device,a feasible scheme of data acquisition system is proposed.For the hardware part,we realize the control of data acquisition module by Single-Chip Microcomputer(SCM),which can automatically read the voltage of the node on the entire experimental device,and send data to the computer using UART serial communication for later processing.For the software part,the design is divided into two parts: the control program of the data acquisition circuit and the visual operation interface of the data processing.The design of the operation interface is accomplished by Matlab software,which mainly realizes the receiving of data and drawing the two-dimensional potential distribution diagram.Through testing,the correctness and practicability of the design are confirmed.Finally,the software and hardware of the data acquisition system are combined to perform the overall test and demonstrate the invisible effect in three different situations.Test results show that the data acquisition system based on dc active cloaking device can effectively collect each node voltage,use the serial port to upload data to the computer,and then map the distribution of electric potential through the interface.The whole measurement process is fully automated,which solves the problem that manual measurement is time-consuming and laborious and error prone.Through the design of the data acquisition system for the DC active cloaking experimental device,the principle of active cloaking and the design method of the experimental device was mastered,and from the testing process,we found the deficiencies in the design,clarified the direction of improvement,and provided rich experience for subsequent design work.