Softness sensor system for simultaneously measuring the mechanical properties of superficial skin layer and whole skin
Softness sensor system for simultaneously measuring the mechanical properties of superficial skin layer and whole skin
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DOI：
10.1111/j.1600-0846.2012.00648.x
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发表时间：
2013-02-01
影响因子：
2.2
通讯作者：
Omata, Sadao
中科院分区：
文献类型：
--
作者：
Nakatani, Masashi;Fukuda, Toru;Omata, Sadao
背景/目的：对不同皮肤层的柔软度进行区分的尝试很少，但对表层的具体测量将有助于评估化妆品的润肤效果和皮肤疾病的诊断。材料和方法：我们研制了一种由压电式触觉传感器和载荷传感器组成的传感器探头。为了对其进行评价，我们首先测量了不同柔软度的硅橡胶样品。然后，将其应用于人体前臂皮肤剥离前后。使用血压计和皮肤表面湿度计来确认角质层是否被移除。结果与结论：压电式触觉传感器和称重传感器都可以测量硅橡胶样品的柔软度，但当被测样品的反作用力小于100mN时，压电式触觉传感器比称重传感器对2 mm压痕的反应更为灵敏。对于活体人皮肤，剥离胶带后，经皮失水和皮肤电导率显著变化，证实角质层被去除。压电式触觉传感器在剥离胶带后检测到明显的变化，而称重传感器没有检测到。因此，该压电式触觉传感器可以检测皮肤表面的机械性能的变化。测力传感器的数据与角度计的测量结果一致，显示剥离胶带后代表性皮肤弹性参数没有变化。这些结果表明，我们的传感器可以同时测量浅层皮肤和整个皮肤的力学性能。
Background/Aims: Few attempts have been made to distinguish the softness of different skin layers, though specific measurement of the superficial layer would be useful for evaluating the emollient effect of cosmetics and for diagnosis of skin diseases.Materials and methods: We developed a sensor probe consisting of a piezoelectric tactile sensor and a load cell. To evaluate it, we firstly measured silicone rubber samples with different softness. Then, it was applied to human forearm skin before and after tape-stripping. A VapoMeter and skin-surface hygrometer were used to confirm removal of the stratum corneum. A Cutometer was used to obtain conventional softness data for comparison.Results and conclusions: Both the piezoelectric tactile sensor and the load cell could measure the softness of silicone rubber samples, but the piezoelectric tactile sensor was more sensitive than the load cell when the reaction force of the measured sample was under 100 mN in response to a 2-mm indentation. For human skin in vivo, transepidermal water loss and skin conductance were significantly changed after tape-stripping, confirming removal of the stratum corneum. The piezoelectric tactile sensor detected a significant change after tape-stripping, whereas the load cell did not. Thus, the piezoelectric tactile sensor can detect changes of mechanical properties at the skin surface. The load cell data were in agreement with Cutometer measurements, which showed no change in representative skin elasticity parameters after tape-stripping. These results indicate that our sensor can simultaneously measure the mechanical properties of the superficial skin layer and whole skin.