Real-time fuzzy monitoring of sitting posture: Development of a new prototype and a new posture classification algorithm to detect postural transitions

Leonardo Martins, Bruno Ribeiro, Hugo Pereira, Rui Almeida, Jéssica Costa, Cláudia Regina Pereira Quaresma, Maria Adelaide de Almeida Pedro de Jesus, Pedro Vieira

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

In a previous work, a chair prototype was used to detect 11 standardized siting postures of users, using just 8 air bladders (4 in the chair’s seat and 4 in the backrest) and one pressure sensor for each bladder. In this paper we describe the development of a new prototype, which is able to classify 12 standard postures with an overall score of 80.9% (using a Neural Network Algorithm). We tested how this Algorithm worked during postural transitions (frontal and lateral flexion) and in intermediate postures, identifying some limitation of this Algorithm. This prompted the development of a Posture Classification Algorithm based on Fuzzy Logic and is able to determine if the user is adopting a good or a bad posture for specific time periods, using as input the Centre of Pressure, the Posture Adoption Time and the Posture Output from the existing Neural Network Algorithm. This newly developed Classification Algorithms is advancing the development of new Posture Correction Algorithms based on Fuzzy Actuators.

Original languageEnglish
Title of host publicationBiomedical Engineering Systems and Technologies - 8th International Joint Conference, BIOSTEC 2015, Revised Selected Papers
PublisherSpringer-Verlag
Pages424-439
Number of pages16
Volume574
ISBN (Print)978-3-319-27706-6, 978-3-319-27707-3
DOIs
Publication statusPublished - 2015
Event8th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2015 - Lisbon, Portugal
Duration: 12 Jan 201515 Jan 2015

Publication series

NameCommunications in Computer and Information Science
Volume574
ISSN (Print)18650929

Conference

Conference8th International Joint Conference on Biomedical Engineering Systems and Technologies, BIOSTEC 2015
CountryPortugal
CityLisbon
Period12/01/1515/01/15

Keywords

  • Fuzzy logic
  • Intelligent chair
  • Neural Networks
  • Pressure-distribution sensors
  • Sitting posture Posture classification

Fingerprint Dive into the research topics of 'Real-time fuzzy monitoring of sitting posture: Development of a new prototype and a new posture classification algorithm to detect postural transitions'. Together they form a unique fingerprint.

Cite this