An Optimal Design of Epidermal Ridges to the Tactile Sensor for Sensitivity Enhancement during Shear Force Detection

2011 ◽  
Vol 131 (4) ◽  
pp. 141-147 ◽  
Author(s):  
Yuhua Zhang ◽  
Norihisa Miki
Keyword(s):  
Optimal Design ◽  
Shear Force ◽  
Tactile Sensor ◽  
Sensitivity Enhancement ◽  
Force Detection

A Flexible Tactile Sensor Based on Porous Graphene Sponge for Tiny Force Measurement

2018 ◽  
Author(s):  
Lingfeng Zhu ◽  
Yancheng Wang ◽  
Xin Wu ◽  
Deqing Mei
Keyword(s):  
Force Measurement ◽  
High Sensitivity ◽  
Tactile Sensor ◽  
Tactile Sensors ◽  
Force Detection ◽  
Pressure Sensing ◽  
Porous Graphene ◽  
Graphene Sponge ◽  
Healthcare Monitoring ◽  
Working Principle

Flexible tactile sensors have been utilized for epidermal pressure sensing, motion detecting, and healthcare monitoring in robotic and biomedical applications. This paper develops a novel piezoresistive flexible tactile sensor based on porous graphene sponges. The structural design, working principle, and fabrication method of the tactile sensor are presented. The developed tactile sensor has 3 × 3 sensing units and has a spatial resolution of 3.5 mm. Then, experimental setup and characterization of this tactile sensor are conducted. Results indicated that the developed flexible tactile sensor has good linearity and features two sensitivities of 2.08 V/N and 0.68 V/N. The high sensitivity can be used for tiny force detection. Human body wearing experiments demonstrated that this sensor can be used for distributed force sensing when the hand stretches and clenches. Thus the developed tactile sensor may have great potential in the applications of intelligent robotics and healthcare monitoring.

A Microfluidic-Based Tactile Sensor for 3-DOF Force/Torque Detection

2015 ◽  
Author(s):  
Yichao Yang ◽  
Zhili Hao
Keyword(s):  
Soft Lithography ◽  
Shear Force ◽  
Normal Force ◽  
Three Dimensional ◽  
Tactile Sensor ◽  
Degree Of Freedom ◽  
Experimental Results ◽  
Torque Sensor ◽  
Resistance Increase ◽  
3D Microstructure

This paper reports on a microfluidic-based tactile sensor capable of detecting forces along two directions and torque about one direction. The 3-Degree-Of-Freedom (3-DOF) force/torque sensor encompasses a symmetric three-dimensional (3D) microstructure embedded with two sets of electrolyte-enabled distributed resistive transducers underneath. The 3D microstructure is built into a rectangular block with a loading-bump on its top and two microchannels at its bottom. Together with electrode pairs distributed along the microchannel length, electrolyte in each microchannel functions as a set of three resistive transducers. While a normal force results in a resistance increase in the two sets of transducers, a shear force causes opposite resistance changes in the two sets of transducers. Conversely, a torque leads to the opposite resistance changes in the two side transducers in each set. Soft lithography and CNC molding are combined to fabricate a prototype tactile sensor. The experimental results validate the feasibility of using this microfluidic-based tactile sensor for 3-DOF force/torque detection.

Shear Force Detection Using Single-Tine Oscillating Tuning Fork for Scanning Near-Field Optical Microscopy

2003 ◽  
Vol 20 (3) ◽  
pp. 338-341 ◽  
Author(s):  
Tan Xiao-Jing ◽  
Sun Jia-Lin ◽  
Liu Sheng ◽  
Guo Ji-Hua ◽  
Sun Hong-San
Keyword(s):  
Optical Microscopy ◽  
Shear Force ◽  
Tuning Fork ◽  
Near Field ◽  
Force Detection

1511 Micro-probing system for slit width measurement by using a shear-force detection

2015 ◽  
Vol 2015.8 (0) ◽  
pp. _1511-1_-_1511-4_
Author(s):  
So Ito ◽  
Hirotaka Kikuchi ◽  
Yuan-Liu Chen ◽  
Yuki Shimizu ◽  
Wei Gao
Keyword(s):  
Shear Force ◽  
Slit Width ◽  
Force Detection ◽  
Width Measurement
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