Shape Memory Alloy (SMA)
Robotics probes, laparoscopic medical probes, micro-lenses positioning
Require alternatives to traditional actuators for applications where space and weight are limited.
This invention proposes actuators that are based on Shape Memory Alloy (SMA) sheets and are built by combining a basic actuation unit. Depending on the combination of these cells the direction of actuation, the force generated and the expansion of the actuator can be controlled. This design reduces the power required and makes mounting the cell simple since the support points are not heated. The force to weight ratio is 160 for comparable power consumption to commercial electromagnetic motors.
US Patent application 12/896184 filed on October 1, 2010
Last revised:February 16, 2011
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