In view of the research status that most of the current studies in the field of soft robots only focus on the actuating function of soft active materials but ignore the sensing function
an actuating/sensing integrated flexible gripper robot is developed. Exploring the structural design and fabrication process of polyvinyl chloride gel actuator
a manufacturing process of CNT/PDMS flexible sensing structure is then investigated. An actuating/sensing integrated functional structure is designed and manufactured
where the PVC gel actuators are taken as the actuating units and the CNT/PDMS 3D structures as the sensing units. The results show that the bending angle of single finger can reach 32.5 degrees under 800 V DC voltage. Driven by 400 V DC voltage
the gripper consisting of two flexible fingers can grasp deformable silicone rubber cylinders with a diameter of 15 mm and shore hardness of 10 - 20
30 - 50 respectively. As grasping the cylinders with different hardness
the resistance change rates of CNT/PDMS demonstrate differently
indicating that the CNT/PDMS flexible sensing structure can sense the softness and hardness of the grasped object
thus verifying the feasibility of the design of actuating/sensing integrated structure proposed in this approach. The results may offer reference for following design and fabrication of the soft robots.
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references
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