Design of miniature parallel manipulators for integration in a self-propelling endoscope

Abstract This paper presents two designs for a miniature robotic manipulator that has to be integrated into a self-propelling endoscope. The endoscope is meant to inspect and intervene in the human colon through which it moves by inchworm locomotion. Both manipulator designs are based on a 3-degree-of-freedom (dof) Stewart platform, either driven by hydraulic pistons or by electromagnetic motors. The hydraulic manipulator is 12 mm in diameter and 30 mm long. It has a stroke of 10 mm and tilts 30–35°. The system is designed to be used at pressures up to 10 bar at which each piston generates a force of 7 N. Piezoelectric and electromagnetic valves are developed that will be integrated into the manipulator. The electrical platform has three telescopic legs driven by a motor-spindle combination. This manipulator has a length and diameter of respectively 50 and 15 mm, and generates speeds up to 5 mm/s and forces up to 1.2 N per leg.

[1]  Takahisa Masuzawa,et al.  Drilling of Deep Microholes by EDM , 1989 .

[2]  Dominiek Reynaerts,et al.  Machining of three-dimensional microstructures in silicon by EDM , 1997 .

[3]  Koji Ikuta,et al.  Shape memory alloy servo actuator system with electric resistance feedback and application for active endoscope , 1988, Proceedings. 1988 IEEE International Conference on Robotics and Automation.

[4]  Koichi Suzumori,et al.  Flexible microactuator for miniature robots , 1991, [1991] Proceedings. IEEE Micro Electro Mechanical Systems.

[5]  Kazuhiro Kosuge,et al.  Micro active catheter system with multi degrees of freedom , 1994, Proceedings of the 1994 IEEE International Conference on Robotics and Automation.

[6]  Maria Chiara Carrozza,et al.  A microrobotic system for colonoscopy , 1997, Proceedings of International Conference on Robotics and Automation.

[7]  Dominiek Reynaerts,et al.  A MICRO ROBOTIC ARM FOR A SELF PROPELLING COLONOSCOPE , 1998 .

[8]  Dominiek Reynaerts,et al.  Design of a shape memory actuated endoscopic tip , 1997 .

[9]  Dominiek Reynaerts,et al.  Machining of three-dimensional microstructures in silicon by electro-discharge machining , 1998 .