Contribution au développement de méthodes innovantes pour la mesure et l'analyse de la force de préhension palmaire
Auteur / Autrice : | Ke Li |
Direction : | David Hewson, Jean-Yves Hogrel |
Type : | Thèse de doctorat |
Discipline(s) : | Optimisation et sûreté des systèmes |
Date : | Soutenance en 2009 |
Etablissement(s) : | Troyes |
Ecole(s) doctorale(s) : | Ecole doctorale Sciences pour l'Ingénieur (Troyes, Aube) |
Mots clés
Mots clés contrôlés
Résumé
Grip strength is a valuable indicator that can be used to describe not only hand function, but also the overall functional status of the upper-limb strength or even of the entire body. A number of improvements could be made. The aim of this thesis is to contribute to the development of new methods of measurement and analysis of grip-strength. After an in-depth literature review of the most relevant aspects of grip-strength testing, an intelligent dynamometer for home-based testing, the Grip-Ball, is presented. This dynamometer consists of a pressure sensor and a wireless communication system, which are inserted in-side a supple, air-tight ball, in order to measure the pressure inside the ball when it is squeezed. In addition to the Grip-Ball, another innovative dynamometer, the Myogrip, which is well-suited to the measurement of very weak grip strength, was compared to two of the most widely-used dynamometers (Jamar and Martin Vigorimeter). Furthermore the investigation was performed to evaluate the effects of elbow position and of the handle sizes when using these three dynamometers. The development of simple predictive model for the maximal grip strength based solely on hand circumference is presented in a third study, with this simple model suitable for routine use. The last three chapters are devoted to the presentation of advanced methods of signal processing obtained from sustained grip-strength contractions: Hilbert-Huang transform, fractal analysis, and recurrence analysis. These methods are able to characterise the effects of fatigue, tremor, disease or age during these sustained contractions