scholarly journals Research and Preparation Method of Flexible Tactile Sensor Material

10.5772/6630 ◽  
2008 ◽  
Author(s):  
Ying Huang ◽  
Min Wang ◽  
Huaili Qiu ◽  
Bei Xiang ◽  
Yugang Zhang
Keyword(s):  
Preparation Method ◽  
Tactile Sensor ◽  
Sensor Material

scholarly journals A large-area flexible tactile sensor for multi-touch and force detection using electrical impedance tomography

2021 ◽  
Author(s):  
Xiaojie Wang ◽  
Haofeng Chen ◽  
Gang Ma ◽  
xuanxuan yang ◽  
jialu geng
Keyword(s):  
Single Point ◽  
Tactile Sensor ◽  
Porous Structures ◽  
Large Area ◽  
Force Detection ◽  
Impedance Tomography ◽  
Sensor Material ◽  
Position Detection ◽  
Novel Design ◽  
Elastic Polymer

In this paper, a large-area flexible tactile sensor for multi-touch and force detection based on EIT technology was developed. A novel design of a sensor material made of a porous elastic polymer and ionic liquid was proposed. The proposed conductive flexible materials combining elastic porous structures and conductive liquids provide continuous, linear changes in impedance with respect to touch forces. A deep learning scheme PSPNet based on MobileNet was adopted to postprocess the originally reconstructed images to improve the performance of tactile perception. By using this data-driven method, we can improve the spatial resolution of the tactile sensor to achieve a single-point position detection error of 7.5±4.5 mm without using internal electrodes.

MEASUREMENT OF QUANTUM TUNNELING COMPOSITE RESISTIVITY CHARACTERISTICS FOR TACTILE SENSING APPLICATIONS

2015 ◽  
Vol 76 (4) ◽  
Author(s):  
Ahsana Aqilah Ahmad ◽  
Cheng Yee Low ◽  
Nurul Muthmainnah ◽  
Ahmed Jaffar
Keyword(s):  
Quantum Tunneling ◽  
Supply Voltage ◽  
Tactile Sensor ◽  
Tactile Sensing ◽  
Robotic Hand ◽  
Force Load ◽  
Sensor Material ◽  
Sensing Applications ◽  
Two Parameters ◽  
Repeated Experiment

This paper presents the work of investigating the used of Quantum Tunneling Composites (QTC) Pills as a tactile sensor material. The QTC Pills was tested for their resistivity characteristics to determine the sensor sensitivity, time of response and its allowable working range. The experiments were conducted base on the two parameters; the voltage, and the separation gap against the force/ load that exerted onto the QTC Pills. The results show that with a 5 V supply voltage and 0.5 mm separation gap of a side-by-side sensor construction, the usage of the QTC Pills as a tactile sensor can be optimized. Besides that the resistivity values established from the repeated experiment using QTC Pills produce the similar value and result. This makes the material suitable to be used as a tactile sensor material for the robotic hand.

Tactile Sensing Using Contact Resistance in MWNT/PDMS Composites

2012 ◽  
Vol 1410 ◽  
Author(s):  
J. Ian McKelvey ◽  
Arpad Kormendy ◽  
L.P. Felipe Chibante
Keyword(s):  
Contact Resistance ◽  
Single Layer ◽  
Tactile Sensor ◽  
Force Sensor ◽  
Fast Response ◽  
Tactile Sensing ◽  
Polydimethyl Siloxane ◽  
Sensor Material ◽  
Sensing Systems ◽  
Finger Pressure

ABSTRACTA carbon nanotube polymer composite has been used to develop a flexible multi-touch tactile sensor device. Rather than employing the inherent bulk piezoresistive properties of the composite, the contact resistance between polymer and electrode was exploited to achieve finger pressure measurement with fast response. We have synthesized a series of multi-walled nanotube (MWNT) silicone composites to test the feasibility of a force sensor based on the change in surface contact resistance as a function of applied force. A single layer MWNT/polydimethyl-siloxane (PDMS) composite in the range of 1.5-3.0 % w/w nanotubes was employed as a force sensor material in an array of electrodes. It was determined that sensors based on these materials are viable as tactile sensing systems for finger-touch forces in the range of 1-100 N.

scholarly journals A large-area flexible tactile sensor for multi-touch and force detection using electrical impedance tomography

2021 ◽  
Author(s):  
Xiaojie Wang ◽  
Haofeng Chen ◽  
Gang Ma ◽  
xuanxuan yang ◽  
jialu geng
Keyword(s):  
Single Point ◽  
Tactile Sensor ◽  
Porous Structures ◽  
Large Area ◽  
Force Detection ◽  
Impedance Tomography ◽  
Sensor Material ◽  
Position Detection ◽  
Novel Design ◽  
Elastic Polymer

In this paper, a large-area flexible tactile sensor for multi-touch and force detection based on EIT technology was developed. A novel design of a sensor material made of a porous elastic polymer and ionic liquid was proposed. The proposed conductive flexible materials combining elastic porous structures and conductive liquids provide continuous, linear changes in impedance with respect to touch forces. A deep learning scheme PSPNet based on MobileNet was adopted to postprocess the originally reconstructed images to improve the performance of tactile perception. By using this data-driven method, we can improve the spatial resolution of the tactile sensor to achieve a single-point position detection error of 7.5±4.5 mm without using internal electrodes.

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

Scanning electron microscopy of human iliac bone by a simple preparation method

1990 ◽  
Vol 48 (3) ◽  
pp. 226-227
Author(s):  
Toshihiko Takita ◽  
Tomonori Naguro ◽  
Toshio Kameie ◽  
Akihiro Iino ◽  
Kichizo Yamamoto
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Real Surface ◽  
Public Attention ◽  
Preparation Methods ◽  
The Real ◽  
Simple Preparation ◽  
Scanning Electron

Recently with the increase in advanced age population, the osteoporosis becomes the object of public attention in the field of orthopedics. The surface topography of the bone by scanning electron microscopy (SEM) is one of the most useful means to study the bone metabolism, that is considered to make clear the mechanism of the osteoporosis. Until today many specimen preparation methods for SEM have been reported. They are roughly classified into two; the anorganic preparation and the simple preparation. The former is suitable for observing mineralization, but has the demerit that the real surface of the bone can not be observed and, moreover, the samples prepared by this method are extremely fragile especially in the case of osteoporosis. On the other hand, the latter has the merit that the real information of the bone surface can be obtained, though it is difficult to recognize the functional situation of the bone.

To Eliminate Curtain Effect of FIB TEM Samples by a Combination of Sample Dicing and Backside Milling

2014 ◽  
Author(s):  
Jian-Shing Luo ◽  
Hsiu Ting Lee
Keyword(s):  
Sample Preparation ◽  
Focused Ion Beam ◽  
Preparation Method ◽  
Low Cost ◽  
Ion Beam ◽  
Sample Preparation Method ◽  
Site Specific ◽  
Dual Beam ◽  
Transmission Electron

Abstract Several methods are used to invert samples 180 deg in a dual beam focused ion beam (FIB) system for backside milling by a specific in-situ lift out system or stages. However, most of those methods occupied too much time on FIB systems or requires a specific in-situ lift out system. This paper provides a novel transmission electron microscopy (TEM) sample preparation method to eliminate the curtain effect completely by a combination of backside milling and sample dicing with low cost and less FIB time. The procedures of the TEM pre-thinned sample preparation method using a combination of sample dicing and backside milling are described step by step. From the analysis results, the method has applied successfully to eliminate the curtain effect of dual beam FIB TEM samples for both random and site specific addresses.

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