| 摘要 |
This invention relates to pulse simulation units for use in patient simulators, where the device comprises a base body, an upper actuator body located in parallel above the base body, one leaver body at each longitudinal end of the base body, which in their lower portion is pivotally attached to the base body and in their upper portion is pivotally attached to the actuator body, and at least one shape memory alloy wire attached in one end to the lower portion of each leaver body below the pivotally attachment to the base body and in the other end to the base body, and where the length of the shape memory alloy actuator wire is adjusted such that when no electric pulse is delivered, the length of the wire(s) allow the leaver bodies to be more or less folded in towards the base body and hold the actuator body to form a compressed position at a first distance above the base body, and such that when the actuator wire(s) contract due to exposure to an electric pulse they will rotate the lever bodies some degrees and thus cause the actuator body to be lifted to an expanded position at a second distance > the first distance above the base body. |
