Title :
Active endoscope with SMA (Shape Memory Alloy) coil springs
Author :
Maeda, Shigeo ; Abe, Kazuhiro ; Yamamoto, Keisuke ; Tohyama, Osamu ; ItO, Hirotaka
Author_Institution :
Dept. Fundamental Res., Mitsubishi Cable Ind. Ltd., Hyogo, Japan
Abstract :
This paper describes the development of an active endoscope which allows a large bending angle for practical application and has a simple structure for miniaturization. An active endoscope (image fiber with 4200 pixels and light guide fiber) 2 mm in outer diameter with a shape memory alloy (SMA) actuator was designed and fabricated. The practical specifications of the SMA coil spring were determined based on a design chart and equation. The active endoscope consists of a bending part, the SMA actuator, and an endoscope. The mechanical properties of the bending part were investigated. The shear modulus of the SMA at room temperature and in the parent phase were determined in designing the actuators
Keywords :
bending; biomedical equipment; biomedical imaging; coils; elastic moduli; fibre optic sensors; intelligent actuators; intelligent sensors; microactuators; shape memory effects; shear modulus; surgery; 2 mm; 4200 pixel; active endoscope; design chart; flexural rigidity; image fiber; large bending angle; light guide fiber; mechanical properties; microactuators; miniaturization; room temperature; shape memory alloy actuator; shape memory alloy coil springs; shear modulus; smart actuators; Actuators; Coils; Endoscopes; Mechanical factors; Minimally invasive surgery; Optical fiber cables; Shape memory alloys; Springs; Temperature; Wire;
Conference_Titel :
Micro Electro Mechanical Systems, 1996, MEMS '96, Proceedings. An Investigation of Micro Structures, Sensors, Actuators, Machines and Systems. IEEE, The Ninth Annual International Workshop on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-2985-6
DOI :
10.1109/MEMSYS.1996.493996
