新型皮肤摩擦特性测量装置的实验研究

研制出新型皮肤摩擦特性测量装置并用于测量人及动物体内、外皮肤的摩擦特性,在不同试验参数下测定了皮肤与假肢接受腔材料之间的摩擦系数.结果表明:该装置法向加载精度高达99.59%;在相同试验条件下测得猪体外皮肤摩擦系数的重复性较好;在人体上、下肢不同部位,只有手掌部位皮肤与其它部位的摩擦系数有显著性差异(P＜0.005);在控制法向载荷和往复移动频率2种模式下得到兔体内皮肤摩擦系数的试验结果具有可比性,摩擦系数随着法向载荷的增加而降低,随着往复移动频率的增加而增大;用该装置摩擦前后其皮肤组织结构有明显变化.

A New Skin Frictional Property Testing Apparatus

A new skin frictional property testing apparatus has been developed for measuring skin frictional properties of human and animal both in-vivo and in-vitro.The frictional properties between various skins and a prosthetic socket material under the same and different test conditions were measured Results show that the precision of normal loading of the apparatus researches 99.59%.The friction coefficients of pig skin in-vitro under the same test condition exhibited gooe repeatability.The friction coefficients measured at different sites of upper and lower limbs were comparable.There are significant differences(P<0.005) in friction coefficient only on the hands and no differences on the other anatomical regions.The friction coefficients measured at rabbit skins under two modes of imposed load and imposed reciprocating frequency were also comparable.The friction coefficients decreased with increasing normal load and increased with increasing reciprocating frequency.The histological configuration between unworn skin and worn skin by reciprocal sliding friction had significant difference.