System Architecture

The soil processing hardware consists of two primary subsystems:

1. Vibration-Motor-Driven Sieve

The sieving subsystem uses a compact eccentric rotating mass vibration motor to create vibration in the sieve assembly. As the motor spins, the off-center mass generates vibration that promotes soil separation, allowing fine soil to pass through the mesh while oversize particles are rejected to waste. This approach enables effective soil separation with minimal mechanical complexity. Moreover, the subsystem is equipped with a passive hopper which guides the fine soil to dispenser's volumetric pockets. 

2. Sized-Well Dispenser

The sized-well dispenser uses a servo-driven rack-and-pinion mechanism to translate rotational motion into linear motion. Besides that, the dispenser has four volumetric pockets and leveling feature which distributes soil to all pockets and rejects excess fine soil. Moreover, each pocket releases a measured quantity of soil into individual cuvettes as the servo actuates.