Four-dimensional atmospheric electric field instrument based on unmanned aerial vehicle

The four-dimensional atmospheric electric field instrument based on the unmanned aerial vehicle comprises the unmanned aerial vehicle and an aerial electric field instrument, a connecting piece detachably connected with the aerial electric field instrument is arranged at the bottom of the unmanned aerial vehicle, and the connecting piece comprises a connecting shaft and a fastening sleeve arranged at the lower end of the connecting shaft in a sleeving mode; a connecting groove is formed in the connecting shaft, at least two mounting grooves communicated with the connecting groove are formed in the side wall of the connecting groove, positioning blocks are arranged in the mounting grooves, reset springs are arranged between the positioning blocks and the bottoms of the mounting grooves, and a connecting rod is arranged on the aerial electric field instrument. And positioning grooves matched with the positioning blocks are formed in the outer sides of the connecting rods. According to the four-dimensional atmos