Journal
JOURNAL OF AGRICULTURAL ENGINEERING
Volume 52, Issue 1, Pages -Publisher
PAGEPRESS PUBL
DOI: 10.4081/jae.2021.1090
Keywords
Tomatoes harvesting; soft gripper; force-controlled gripper; smart farming
Categories
Funding
- National Research Council of Thailand (NRCT)
- Department of Mechanical Engineering at KMUTT
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In smart farming, artificial intelligence and robotic systems are utilized to enhance efficiency in tasks like seeding, monitoring, and harvesting. A soft robotic three-fingered gripper, made of silicone rubber and designed using the finite element method, can handle spherical objects such as tomatoes or oranges. The gripper, actuated pneumatically with controlled force, can grasp tomatoes without exceeding the bio-yield force of 2.57 N.
In smart farming, both artificial intelligence and robotic systems are applied in order to improve efficiency. In agriculture, for jobs such as seeding, monitoring, and harvesting, robots are widely used. When using robots to harvest fruit and vegetables, it is essential not to apply excessive force, as it may damage the harvest. In this paper, a soft robotic three-fingered gripper is presented. It was designed and analysed using the finite element method. Each finger is made of silicone rubber. The shape of the finger is designed so that it is capable of handling spherical shaped objects, such as tomatoes or oranges. When holding a tomato, the fingers apply the contact force. The fingers are actuated pneumatically and the force applied is also controlled by a micro controller. The pressure inside the air chamber of the finger is in the range of 095 kPa. Force sensors are attached to the end of each finger to provide force feedback. Then, the holding force is adjusted and applied to the surface of the tomato. The gripper can successfully grasp tomatoes with a force less than the bio-yield of the tomatoes 2.57 N.
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