Particle segregation using localized pneumatic actuation

Overview

This innovative solution combines whole-platform vibration with localized pneumatic actuation to segregate particles in granular materials. The system employs soft robotic pneumatic actuators, which are small balloons that cyclically inflate and deflate, embedded on a plate. These actuators, when synchronized, create traveling waves that induce movement and segregation of particles such as cocoa bean fractions. The method is particularly effective for separating materials with differing densities, sizes, and surface textures, leveraging these physical disparities to drive self-organization and segregation.

Technical specifications

• Actuation Modes:
  • Basic expansion/contraction to agitate and mobilize particles.
  • Expansion with aeration to reduce particle cohesion due to oils.
  • Directional aeration for net movement, aiding in lighter particle mobilization.
• System Components:
  • Soft pneumatic actuators with variable size, inflation rate, and airflow capabilities.
  • Integrated vibrating platform to enhance actuator effectiveness.
• Applications:
  • Effective for cocoa bean segregation, leveraging density and texture differences.
  • Potential applicability in other granular material processing industries.

Technology readiness level

Currently at TRL 5, this technology has been validated in a laboratory setting with preliminary experiments confirming its effectiveness. The ongoing development includes optimizing actuator placements and control systems to maximize separation efficiency, with future testing planned using actual cocoa bean mixtures.