Thesis

Novel design for foot pressure measurement using opto-electronics in rehabilitation

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Awarding institution
  • University of Strathclyde
Date of award
  • 2012
Thesis identifier
  • T13230
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Department, School or Faculty
Abstract
  • The purpose of this research has been to explore the application of a new technology to design a new uniaxial transducer for measuring the plantar pressure of the foot. The measurement approach used here is an optical system that could be incorporated between the foot and the shoe via an in sole. The information obtained can be used to assess the pressure and the kinetic variables that will help the physician to understand the patients' locomotor system better. For this project, a mechanical arrangement has been designed for substantiating the concept of the project. An optoelectronic circuit consisting of an infra-red emitting diode and a photo-detector is placed inside the mechanical device. The emitter diode emits 940 nm infra-red rays and strikes on a reflective surface where the compressive loading changes the refractive angle and the path length of the transmitted light, thereby varying the intensity of light reaching the detector. The change in intensity of light detected will be proportional to the change in voltage and the recorded voltage is observed in a voltmeter or an oscilloscope. Static compressive loading using load plates and an INSTRON is performed here to initially validate the proof of concept. Primary results show that the electronic circuitry has responded to the compressive loading. The rubber used instilled a non-linear response of the transducer, but nevertheless the concept is validated for miniaturisation and incorporated into applications.
Resource Type
DOI
Date Created
  • 2012
Former identifier
  • 947895

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