Pietro Chirio
Design and implementation of a robotic pressure-sensing hand for an autonomous grape harvesting system.
Rel. Marco Vacca, Massimo Ruo Roch. Politecnico di Torino, Corso di laurea magistrale in Mechatronic Engineering (Ingegneria Meccatronica), 2024
Abstract
This master’s thesis presents the mechanical and electrical design of a hand-like end-effector integrated into an innovative autonomous grape harvesting system. To interact safely and effectively with delicate, irregularly shaped fruit such as grapes, the end-effector, and its control system were designed to replicate the movements and approach typically employed by human harvesters. A core aspect of this design is the skin-like pressure sensor network embedded within the robotic hand, enabling the end-effector to continuously monitor and regulate the applied force during interactions with the fruit, ensuring optimal handling. This sensor network was intentionally built with scalability in mind, allowing future system iterations to enhance the “resolution” of pressure sensing capabilities, thus facilitating more refined control during harvesting tasks.
The development of the robotic hand commenced with the creation of a custom printed circuit board capable of controlling the finger motors, gathering and preprocessing sensor data, and communicating with the system’s central computational unit and other peripherals via a low-energy Bluetooth protocol
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