This invention provides an air-ground combined ultrasonic
pest control system, belonging to the field of
pest control technology. It includes a
balloon, an ultrasonic
transmitter, an installation box, an
air pump, a containment box, a
rope, and a rotating shaft. The containment box and installation box are installed in the middle of crops in a field. The containment box is installed on the ground, and the rotating shaft is rotatably installed inside the installation box, which is installed below
ground level. The
air pump is installed inside the installation box and is connected to the
balloon. When the ultrasonic
transmitter needs to be used to repel pests from the crops, the
air pump fills the
balloon with a gas with a density lower than air. The balloon then carries the ultrasonic
transmitter into the air, where it activates and directs downwards to repel pests from the crops. After the pests are repelled, the
rope, rotating on the shaft, winds around it, pulling the ultrasonic transmitter into the containment box, thus retrieving both the balloon and the ultrasonic transmitter.