Experimental Evaluation and Characterization of Piezo-film Force Sensors in Graspers

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Veyseh, Mohamad Ali | 2014

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Type of Document: M.Sc. Thesis
Language: English
Document No: 45899 (58)
University: Sharif University of Technology, International Campus, Kish Island
Department: Science and Engineering
Advisor(s): Farahmand, Farzam
Abstract:
Minimally invasive surgery (MIS) is a new surgical technique in which surgery is performed using smart instruments and viewing apparatus inserted through a very small incision rather than by making a large incision to expose, and afford access to the operation site. Piezo film force sensor can be used in MIS graspers for providing tactile data to overcome problems such as lack of sense of touch or to find hidden arteries.This thesis, investigates fundamental understanding of piezo film sensor especially when we want to connect these sensors to measurement units.Two different approaches for signal conditioning the sensor have been proposed and circuits have been fabricated. Several experiments have been performed to evaluate the ability of proposed circuits and piezo film sensor for measuring static,ramp,low frequency forces and localizing hidden arteries .Both techniques showed good ability in measuring static and low frequency forces but only voltage mode proved to have the ability for finding hidden arteries and detecting human heart pulses
Keywords:
Force Sensor ; Arteries ; Heart Beat ; Piezo-Film ; Surgical Grasper

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