title: A finger-shaped tactile sensor for fabric surfaces evaluation by 2-dimensional active sliding touch.
abstract: Sliding tactile perception is a basic function for human beings to determine the mechanical properties of object surfaces and recognize materials. Imitating this process, this paper proposes a novel finger-shaped tactile sensor based on a thin piezoelectric polyvinylidene fluoride (PVDF) film for surface texture measurement. A parallelogram mechanism is designed to ensure that the sensor applies a constant contact force perpendicular to the object surface, and a 2-dimensional movable mechanical structure is utilized to generate the relative motion at a certain speed between the sensor and the object surface. By controlling the 2-dimensional motion of the finger-shaped sensor along the object surface, small height/depth variation of surface texture changes the output charge of PVDF film then surface texture can be measured. In this paper, the finger-shaped tactile sensor is used to evaluate and classify five different kinds of linen. Fast Fourier Transformation (FFT) is utilized to get original attribute data of surface in the frequency domain, and principal component analysis (PCA) is used to compress the attribute data and extract feature information. Finally, low dimensional features are classified by Support Vector Machine (SVM). The experimental results show that this finger-shaped tactile sensor is effective and high accurate for discriminating the five textures.
authors.affiliation: School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China. huhaihuadongda@hotmail.com.
authors.forename: Haihua
authors.initials: H
authors.lastname: Hu
authors.affiliation: School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China. 220122600@seu.edu.cn.
authors.forename: Yezhen
authors.initials: Y
authors.lastname: Han
authors.affiliation: School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China. a.g.song@seu.edu.cn.
authors.forename: Aiguo
authors.initials: A
authors.lastname: Song
authors.affiliation: Nation Key Laboratory of Human Factors Engineering, Beijing 100094, China. shanguang_chen_hf@163.com.
authors.forename: Shanguang
authors.initials: S
authors.lastname: Chen
authors.affiliation: Nation Key Laboratory of Human Factors Engineering, Beijing 100094, China. Chunhui_wang_hf@126.com.
authors.forename: Chunhui
authors.initials: C
authors.lastname: Wang
authors.affiliation: Nation Key Laboratory of Human Factors Engineering, Beijing 100094, China. zheng_wang_hf@yeah.net.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Wang
mesh_terms: D001512:Bedding and Linens; D032701:Biomimetics; D004867:Equipment Design; D005385:Fingers / Q000502:physiology; D006801:Humans; D011145:Polyvinyls; D025341:Principal Component Analysis; D060388:Support Vector Machine; D013499:Surface Properties; D013784:Textiles; D014110:Touch / Q000502:physiology*; D005465:Fluorocarbon Polymers
chemical_list: D011145:Polyvinyls; C024865:polyvinylidene fluoride; D005465:Fluorocarbon Polymers