Finger friction test device

Abstract

A finger friction test device is mainly structured as follows: a servo motor on a rectangular pedestal drives a sliding table through a leading screw and nut mechanism to slide side to side; the upper surface of the sliding table is connected with a sample stage through a strain-type two-direction force sensor; a three-dimensional acceleration sensor is installed on the sample stage; a sound sensor is arranged; a left connecting rod and a right connecting rod which can rotate and can be fastened are mounted on the pedestal; a finger support block is fixed on the right connecting rod, and the left connecting rod is connected with a finger press block, which can move up and down and can be fastened, through an installation block and a loading plate; and the servo motor, the strain-type two-direction force sensor, the three-dimensional acceleration sensor and the sound sensor are all electrically connected to a control and signal acquisition and processing system. The device of the invention can reliably and accurately analyze and study the relations of test parameters and friction coefficients including friction angle, friction normal force, relative sliding speed, etc., vibration acceleration and acoustical signals when the finger is in contact friction with a substance, thus providing the basis for surface design of relevant products and touch simulation design of an intelligent robot.

Description

Technical field [0001] The invention relates to a finger friction test device. Background technique [0002] Finger tribology is an important research topic of body surface in biotribology. Finger contact and friction behavior can be seen everywhere in human activities, such as the operation of buttons, joysticks, etc., touch operations on the touch screen, unscrewing the bottle cap, using the keyboard, and the mouse. In these behaviors, the fingers will rub against various materials due to touch and sliding, which will affect the fingers and cause the skin of the fingers to deform, such as: fingers and labor production tools, sports goods, etc. ; The comfort of friction between fingers and touch screen and other materials. Therefore, it is necessary to test and study the laws of friction force vector and vibration acceleration vector when the finger is in contact and friction, that is, the friction mechanics characteristics of the finger. Thus, according to the measured frict...

AI Technical Summary

Problems solved by technology

In addition, when the friction angle changes, the contact area between the finger and the object changes greatly, which has a great impact on the tribological properties such as friction force, resulting in inaccurate test results and large errors, which cannot be used for the design of related products. and manufacturing to provide reliable and accurate test basis

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