Anti-reflux devices for preventing intraluminal reflux through double-J stents using elastomer casting process

Kim, Junho; So, Byeongchan; Jo, Jung Ki; So, Hongyun

doi:10.1016/j.sna.2023.114267

Cited by 2 publications

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We also investigated the feasibility of using Peltier devices as a solution to the low bandwidth problem of thermo-active soft actuators. We conducted four sets of experiments using an elastomeric sample made of a mixture of Ecoflex 00-50 [45]- [48] and Novec 7000 phase-change fluid [49]. The sample was placed inside a cylinder beneath a piston, and the entire system was placed on either a Peltier device or a flexible heater strip.…”

Section: Cycles and Peltier Comparisonmentioning

confidence: 99%

Novel Phase-Chance Soft Actuators Controlled via Peltier

Johnson

View full text Add to dashboard Cite

Soft actuation methods are a developing field of robotics deemed suitable for physical human-robot interactions due to the adaptability of materials and compliant structures. Thermo-active soft actuators are a subset of these which convert thermal energy to mechanical work in the form of elongation, bending, or twisting to conform to the environment. This study is divided into three major studies that all use actuators with a working principle of phase-change fluid vaporizing for expansion with applied heat from a Peltier. The first study evaluates the bandwidth and efficiency between (i) traditional Joule heating, and (ii) Peltier heating, finding that Peltier heating can considerably improve the operational bandwidth of the actuator. The second study uses a thin membrane actuator placed in a braided mesh to form a McKibben muscle capable of lifting 5N, and formed into a gripper capable of manipulating objects within the environment. The third study uses actuators of a solid, hollow and flexible Peltier embedded silicone structure and are evaluated and optimized in order to increase actuation speed, finding that the embedded flexible Peltier design was able to elongate over 50% of its original height in 20 seconds. The overall aim of all of these studies was to improve bandwidth, efficiency, actuator lifetime, and create more symmetrical actuation and deactuation cycles.

show abstract

Section: Cycles and Peltier Comparisonmentioning

confidence: 99%