A Menciassi et al 2005 J. Micromech. Microeng. 15 2045 doi:10.1088/0960-1317/15/11/008
A Menciassi, A Moglia, S Gorini, G Pernorio, C Stefanini and P Dario
Show affiliationsThis paper describes the development of an active clamping mechanism to be integrated into a swallowable pill for the diagnosis of the gastrointestinal (GI) tract. The clamping system allows us to stop the pill at desired sites of the GI tract for long monitoring purposes. After discussing the major technical constraints, the design of the core component, i.e. the gripper, based on FEA (finite element analysis), is illustrated as well as its fabrication process. Symmetric and asymmetric gripper designs are described. The actuation is provided by shape memory alloys (SMA), and it is driven by a dedicated electrical interface. Then the working prototypes have been tested in vitro: for both kinds of grippers a pull-back force up to 0.6 N has been measured. A preliminary theoretical model for the gripper has been derived and compared to the experimental results.
85.85.+j Micro- and nano-electromechanical systems (MEMS/NEMS) and devices
Issue 11 (November 2005)
Received 8 June 2005, in final form 24 August 2005
Published 20 September 2005
A Menciassi et al 2005 J. Micromech. Microeng. 15 2045
Y Hatsugai 1997 J. Phys.: Condens. Matter 9 2507
S Bietti et al 2009 IOP Conf. Ser.: Mater. Sci. Eng. 6 012009
J H Hannay 1998 J. Phys. A: Math. Gen. 31 L53
R Beals et al 1999 Inverse Problems 15 L1
R Haydock et al 1972 J. Phys. C: Solid State Phys. 5 2845
R Haydock et al 1975 J. Phys. C: Solid State Phys. 8 2591
E Saeedi et al 2008 J. Micromech. Microeng. 18 075019
Benjamin C. Allanach et al JHEP03(2003)016
Neil Anderson et al 2006 J. Opt. A: Pure Appl. Opt. 8 S227