A Newly Developed Experimental Device for Friction Analysis of Finger Touch

The study on friction behavior of finger touch is significant for the human life and production. The properties of finger friction has not been recognized deeply due to the fact that the process of finger touch is influenced by a lot of factors. A newly developed experimental device was used to solve the phenomenon of un-control parameters occurred and improve the poor reliability in the current experiments, and repeated tests of finger friction were conducted by using this new-developed device. It is found that the stability of normal force and contact angle can be ensured, which made the test results of good comparability and reliability. Furthermore, the newly-developed device was also validated to accurately investigate the influence of different factors, e.g. surface roughness and contact angle, on friction behavior of finger touch. The development of this experimental device is important to further investigate and understand the friction behavior of finger touch.