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Author:

Chu, Zhongyi (Chu, Zhongyi.) | Su, Lin (Su, Lin.) | Chen, Gen (Chen, Gen.) | Cui, Jing (Cui, Jing.) (Scholars:崔晶) | Sun, Fuchun (Sun, Fuchun.)

Indexed by:

EI Scopus SCIE

Abstract:

Miniaturized multi-axis (force & torque) tactile sensors are paramount for the robot system to interact safely with the external environment, especially for the controlled adhesive robots. However, there exists a drawback-measurement anisotropy, which prevents sensors from performing equally well in all the directions and the high degree of integration. Based on the plate capacitive mechanism, this paper introduces a miniaturized 5-axis tactile sensing method with a novel double-layer sensitive structure. Practically, shear force is detected by measuring the change of overlap area in the upper-layer-sensing cell, while the normal force and moment can be obtained by the variable space between two plates arranged in a 2 x 2-grid in the lower-layer-sensing cell. Moreover, in order to achieve the measurement isotropy, the relationship between the force/torque and the capacitance is clarified to facilitate the independent adjustment of the sensitivity of each axis. Based on the methodology, a miniature 5-axis flat tactile sensor is manufactured. The experimental results show that the shear sensitivity of the prepared sensor is over 0.2557pF/N within 7 N, reaching the same magnitude as normal force (0.2859pF/N over 3N range). The sensitivities of torque are over 1.8406 (N.m)(-1) with a full-scale range of 0.04 N.m. The results demonstrate that the miniaturized tactile sensor is capable of isotropic measurement among 5-axis for robotic manipulation.

Keyword:

tactile sensors measurement isotropy Multi-axis robotic manipulation double-layer capacitors

Author Community:

  • [ 1 ] [Chu, Zhongyi]Beihang Univ, Sch Instrument Sci & Optoelect Engn, Beijing 100191, Peoples R China
  • [ 2 ] [Su, Lin]Beihang Univ, Sch Instrument Sci & Optoelect Engn, Beijing 100191, Peoples R China
  • [ 3 ] [Chen, Gen]Beihang Univ, Sch Instrument Sci & Optoelect Engn, Beijing 100191, Peoples R China
  • [ 4 ] [Cui, Jing]Beijing Univ Technol, Sch Mech Engn & Appl Elect, Beijing 101100, Peoples R China
  • [ 5 ] [Sun, Fuchun]Tsinghua Univ, Dept Comp Sci & Technol, Beijing 101101, Peoples R China

Reprint Author's Address:

  • [Chu, Zhongyi]Beihang Univ, Sch Instrument Sci & Optoelect Engn, Beijing 100191, Peoples R China

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Source :

IEEE SENSORS JOURNAL

ISSN: 1530-437X

Year: 2019

Issue: 22

Volume: 19

Page: 10243-10252

4 . 3 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:136

JCR Journal Grade:2

Cited Count:

WoS CC Cited Count: 9

SCOPUS Cited Count: 8

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 8

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