为了保存无人机在飞行过程中的影像数据,一般采用SD卡作为存储设备,但在实际应用中只能在无人机作业任务结束后手动取出SD卡进行数据拷贝,无法实时获取、查看或预览SD卡中的数据。本文采用多路复用器芯片设计了一个SD卡分时复用电路,实现了SD卡数据的共享,然后通过树莓派和4G通信模块实现SD卡的远程读取。实验结果表明,该方案有效避免了无人机设备频繁插拔SD卡读取数据的问题,提升了数据获取的便利性和实时性,具有一定的工程应用价值。

In order to save the image data of UAV during flight,SD card is generally used as the storage device.However,in practical application,SD card can only be manually removed for data copy after the UAV operation task,and the data in SD card cannot be obtained,viewed or previewed in real time.In this paper,an SD card time-sharing multiplexing circuit is designed using multiplexer chip to realize the SHARING of SD data,and then the remote reading of SD card is realized through Raspberry PI and 4G communication module.The experiment results show that the scheme effectively avoids the problem of frequently inserting and removing SD cards to read data,improves the convenience and real-time of data acquisition,and has important engineering application value.