Development of a magnetic composite material for measurement of residual limb displacements in prosthetic sockets:

Journal of Rehabilitation and Assistive Technologies Engineering

Ethan JWeathersby¹ 

关键词: Amputees;    biomechanical testing/analysis;    limb prosthetics;    rehabilitation;    sensor design;   

DOI  :  10.1177/2055668318763481

学科分类：工程和技术（综合）

来源: Sage Journals

【 摘 要 】

IntroductionWearable limb–socket displacement sensors may help patients and prosthetists identify a deteriorating socket fit and justify the need for repair or replacement.MethodsA novel sensor using an inductive sensing modality was developed to detect limb-to-socket distances. Key detection elements were a coil antenna placed in the socket wall and a magnetic composite sheath worn over the outside of the prosthesis user's elastomeric liner. The sheath was a nylon or cotton prosthetic stocking coated with a polyurethane composite. The polyurethane composite contained embedded iron particles (75 wt%).ResultsBrushing γ-glycidoxypropyltriethoxysilane onto the sheath fabric, coating it first with unfilled polyurethane and then iron-filled polyurethane, enhanced bonding between the sheath and the composite and overcame mechanical degradation problems. A γ-glycidoxypropyltriethoxysilane-rich fumed silica layer applied to the outside of the sheath reduced friction and improved durability. Field testing demonstr...

【 授权许可】

CC BY