| With the society and economic developing, the lifestyle is changing. The aging population and the urbanization process accelerate. People become more and more care about skin health. And family or home care portable device gradually is needed to introduce into people’s lives.As an important indicator toevaluatethe skin function,the detection of skin elasticity and skin viscosityperformsa significance role. In the current applications, the uniaxial tension or compression plays as a standard method for measuring skin viscoelasticity. However, this method is invasive testing, and can lead to other complications. That makes it difficult to obtain widely used in clinical. In recent years, indentation method plays as a noninvasive method to detect skin viscoelasticity. Because of its accuracy and reliability, it has been widely recognized in clinical and the related equipment is also used in clinical testing.In this study, a detailed analysis that isa principletodetect skin viscoelasticity is introduced.Indentation method is based on a single degree of freedom vibration model and the two-phase porous viscoelastic theory to realize skin viscoelastic noninvasive testing.Based on that theory, the study developsa skin viscoelasticity testing system to obtain the elastic force of the skin- time diagram and deformation- time diagram.This study describes the deformation input methods, deformation measuring design and skin pressure measuring design in details. This study also uses Origin software to process data for making the test results more intuitive.This study also discusses the relationship between the forehead, outer forearm, lower leg and other parts and the elastic through a lot of experiments. And by detecting force and deformationinside of the forearm, this study further explores the relevance of skin elasticity with age to help quantify the degree of skin aging, provides a reference for skin care, meanwhile italso serves as a role to help doctors determine skin lesions. |
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