Abstract
Method for evaluating mechanical response of human skin against micro impact force is proposed. The method is a variation of the levitation mass method, which has been proposed and developed by the author. In the method, a mass that is levitated with a pneumatic linear bearing, and hence encounters negligible friction, is made to collide with an object under test, such as a skin of human hand. During the collision the Doppler frequency shift of the laser beam reflecting from the mass is accurately measured using an optical interferometer. The velocity, the position, the acceleration and the inertial force of the mass are calculated from the measured time-varying Doppler frequency shift. The method is characterized by the fact that preparation of the test is very easy and the testing time is very short.
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