Rolling Sowing
Background
This case shows a device that mimics tumbleweeds to automate seeding in tough environments like deserts. It responds to temperature and humidity, releasing seeds at the optimal moment. As the temperature drops, the branches curl into a ball, rolling with the wind. When humidity rises, the scales on the sides open up to scatter seeds across the landscape.
How it Works
- During the day, the desert heat causes the branches (dispersal structure) of the tumbleweed device to spread out flat, preventing it from rolling while also protecting the seeds from direct sunlight.
- As the temperature decreases, the branches begin to bend, and the entire device slowly curls into a ball shape. This allows it to be easily carried by the wind.
- In the evening, as humidity rises or after rainfall, the scales (release structure) along the sides of the branches open up, releasing seeds into the environment.
- When the wind blows, the device rolls across the terrain, scattering seeds at the right moment, and efficiently spreading them over a larger area in ideal temperature and humidity conditions.
Coordinating Mode
The device design follows the Synergistic Mode.
Result
We tested the device in sandy terrain. Once spherical, it effectively dispersed seeds across uneven sand dunes, with each branch carrying 4-5 seeds (3 mm in length). After rolling for nearly 60 meters, most of the seeds were released, ensuring broad and efficient seed coverage.