Pressure Insensitive Strain Sensor with Facile Solution-Based Process for Tactile Sensing Applications

ACS Nano ◽  
2018 ◽  
Vol 12 (8) ◽  
pp. 7546-7553 ◽  
Author(s):  
Jinwon Oh ◽  
Jun Chang Yang ◽  
Jin-Oh Kim ◽  
Hyunkyu Park ◽  
Se Young Kwon ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Tactile Sensing ◽  
Sensing Applications

scholarly journals A Transparent Strain Sensor Based on PDMS-Embedded Conductive Fabric for Wearable Sensing Applications

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 71020-71027 ◽  
Author(s):  
Anindya Nag ◽  
Roy B. V. B. Simorangkir ◽  
Elizabeth Valentin ◽  
Toni Bjorninen ◽  
Leena Ukkonen ◽  
...  
Keyword(s):  
Strain Sensor ◽  
Conductive Fabric ◽  
Wearable Sensing ◽  
Sensing Applications

Optimization of 3D Printed Elastomeric Nanocomposites for Flexible Strain Sensing Applications

2019 ◽  
Author(s):  
Mohammad Abshirini ◽  
Mohammad Charara ◽  
Mrinal C. Saha ◽  
M. Cengiz Altan ◽  
Yingtao Liu
Keyword(s):  
3D Printing ◽  
Strain Sensor ◽  
Sensitive Strain ◽  
Curing Temperature ◽  
Gauge Factor ◽  
Strain Sensing ◽  
Sensing Applications ◽  
Wide Range ◽  
Load Rate ◽  
3D Printed

Abstract Flexible and sensitive strain sensors can be utilized as wearable sensors and electronic devices in a wide range of applications, such as personal health monitoring, sports performance, and electronic skin. This paper presents the fabrication of a highly flexible and sensitive strain sensor by 3D printing an electrically conductive polydimethylsiloxane (PDMS)/multi-wall carbon nanotube (MWNT) nanocomposite on a PDMS substrate. To maximize the sensor’s gauge factor, the effects of MWNT concentration on the strain sensing function in nanocomposites are evaluated. Critical 3D printing and curing parameters, such as 3D printing nozzle diameter and nanocomposites curing temperature, are explored to achieve the highest piezoresistive response, showing that utilizing a smaller deposition nozzle size and higher curing temperature can result in a higher gauge factor. The optimized 3D printed nanocomposite sensor’s sensitivity is characterized under cyclic tensile loads at different maximum strains and loading rates. A linear piezoresistive response is observed up to 70% strain with an average gauge factor of 12, pointing to the sensor’s potential as a flexible strain sensor. In addition, the sensing function is almost independent of the applied load rate. The fabricated sensors are attached to a glove and used as a wearable sensor by detecting human finger and wrist motion. The results indicate that this 3D printed functional nanocomposite shows promise in a broad range of applications, including wearable and skin mounted sensors.

scholarly journals Tactile Sensing and Control of Robotic Manipulator Integrating Fiber Bragg Grating Strain-Sensor

2019 ◽  
Vol 13 ◽  
Author(s):  
Luca Massari ◽  
Calogero M. Oddo ◽  
Edoardo Sinibaldi ◽  
Renaud Detry ◽  
Joseph Bowkett ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Sensor ◽  
Robotic Manipulator ◽  
Bragg Grating ◽  
Tactile Sensing ◽  
And Control

scholarly journals Fabrication of Pressure Sensor Using Electrospinning Method for Robotic Tactile Sensing Application

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1320
Author(s):  
Tamil Selvan Ramadoss ◽  
Yuya Ishii ◽  
Amutha Chinnappan ◽  
Marcelo H. Ang ◽  
Seeram Ramakrishna
Keyword(s):  
Pressure Sensor ◽  
Applied Pressure ◽  
Pressure Sensors ◽  
Open Circuit ◽  
Tactile Sensing ◽  
Base Materials ◽  
Sensing Applications ◽  
Electrospinning Method ◽  
Base Polymer ◽  
External Stimuli

Tactile sensors are widely used by the robotics industries over decades to measure force or pressure produced by external stimuli. Piezoelectric-based pressure sensors have intensively been investigated as promising candidates for tactile sensing applications. In contrast, piezoelectric-based pressure sensors are expensive due to their high cost of manufacturing and expensive base materials. Recently, an effect similar to the piezoelectric effect has been identified in non-piezoelectric polymers such as poly(d,l-lactic acid (PDLLA), poly(methyl methacrylate) (PMMA) and polystyrene. Hence investigations were conducted on alternative materials to find their suitability. In this article, we used inexpensive atactic polystyrene (aPS) as the base polymer and fabricated functional fibers using an electrospinning method. Fiber morphologies were studied using a field-emission scanning electron microscope and proposed a unique pressure sensor fabrication method. A fabricated pressure sensor was subjected to different pressures and corresponding electrical and mechanical characteristics were analyzed. An open circuit voltage of 3.1 V was generated at 19.9 kPa applied pressure, followed by an integral output charge (ΔQ), which was measured to calculate the average apparent piezoelectric constant dapp and was found to be 12.9 ± 1.8 pC N−1. A fabricated pressure sensor was attached to a commercially available robotic arm to mimic the tactile sensing.

Robust polymer-HfO2 thin film laminar composites for tactile sensing applications

2018 ◽  
Vol 28 (2) ◽  
pp. 025002 ◽  
Author(s):  
Kavin V I Sivaneri ◽  
Ozcan Ozmen ◽  
Mina Aziziha ◽  
Edward M Sabolsky ◽  
Thomas H Evans ◽  
...  
Keyword(s):  
Thin Film ◽  
Tactile Sensing ◽  
Laminar Composites ◽  
Sensing Applications

Tactile sensing for surgical and collaborative robots and robotic grippers

2019 ◽  
Vol 46 (1) ◽  
pp. 1-6
Author(s):  
Robert Bogue
Keyword(s):  
Haptic Feedback ◽  
Research Effort ◽  
Physical Contact ◽  
Tactile Sensing ◽  
Tactile Sensors ◽  
Surgical Robots ◽  
Collaborative Robots ◽  
Content Type ◽  
Sensing Applications ◽  
Contact Sensing

Purpose This paper aims to illustrate the increasingly important role played by tactile sensing in robotics by considering three specific fields of application. Design/methodology/approach Following a short introduction, this paper first provides details of tactile sensing principles, technologies, products and research. The following sections consider tactile sensing applications in robotic surgery, collaborative robots and robotic grippers. Finally, brief conclusions are drawn. Findings Tactile sensors are the topic of an extensive and technologically diverse research effort, with sensing skins attracting particular attention. Many products are now available commercially. New generations of surgical robots are emerging which use tactile sensing to provide haptic feedback, thereby eliminating the surgeon’s total reliance on visual control. Many collaborative robots use tactile and proximity sensing as key safety mechanisms and some use sensing skins. Some skins can detect both human proximity and physical contact. Sensing skins that can be retrofitted have been developed. Commercial tactile sensors have been incorporated into robotic grippers, notably anthropomorphic types, and allow the handling of delicate objects and those with varying shapes and sizes. Tactile sensing uses will inevitably increase because of the ever-growing numbers of robots interacting with humans. Originality/value This study provides a detailed account of the growing use of tactile sensing in robotics in three key areas of application.

Self-Powered Antibacterial Systems in Environmental Purification, Wound Healing and Tactile Sensing Applications

Nano Energy ◽  
2021 ◽  
pp. 106826
Author(s):  
Aiping Li ◽  
Hsin-Hsuan Ho ◽  
Snigdha Roy Barman ◽  
Sangmin Lee ◽  
Fei Gao ◽  
...  
Keyword(s):  
Wound Healing ◽  
Tactile Sensing ◽  
Sensing Applications ◽  
Self Powered

scholarly journals Surface Acoustic Wave-Based Flexible Piezocomposite Strain Sensor

Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1576
Author(s):  
Rishikesh Srinivasaraghavan Govindarajan ◽  
Eduardo Rojas-Nastrucci ◽  
Daewon Kim
Keyword(s):  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Lead Zirconate Titanate ◽  
Polyvinylidene Fluoride ◽  
Strain Sensor ◽  
Fast Response ◽  
Lead Zirconate ◽  
Saw Sensor ◽  
Sensing Applications ◽  
Wide Range

A surface acoustic wave (SAW), device composed of polymer and ceramic fillers, exhibiting high piezoelectricity and flexibility, has a wide range of sensing applications in the aerospace field. The demand for flexible SAW sensors has been gradually increasing due to their small size, wireless capability, low fabrication cost, and fast response time. This paper discusses the structural, thermal, and electrical properties of the developed sensor, based on different micro- and nano-fillers, such as lead zirconate titanate (PZT), calcium copper titanate (CCTO), and carbon nanotubes (CNTs), along with polyvinylidene fluoride (PVDF) as a polymer matrix. The piezocomposite substrate of the SAW sensor is fabricated using a hot press, while interdigital transducers (IDTs) are deposited through 3D printing. The piezoelectric properties are also enhanced using a non-contact corona poling technique under a high electric field to align the dipoles. Results show that the developed passive strain sensor can measure mechanical strains by examining the frequency shifts of the detected wave signals.

Embedded 3D Printing of Highly Flexible Nanocomposites With Piezoresistive Sensing Capabilities

2020 ◽  
Author(s):  
Blake Herren ◽  
Mrinal C. Saha ◽  
M. Cengiz Altan ◽  
Yingtao Liu
Keyword(s):  
3D Printing ◽  
Human Skin ◽  
Strain Sensor ◽  
Strain Range ◽  
High Sensitivity ◽  
Curing Temperature ◽  
Gauge Factor ◽  
Strain Sensing ◽  
Sensing Applications ◽  
Human Joints

Abstract In recent years, highly flexible nanocomposite sensors have been developed for the detection of a variety of human body movements. To precisely detect the bending motions of human joints, the sensors must be able to conform well with the human skin and produce signals that effectively describe the amount of deformation applied to the material during bending. In this paper, a carbon nanotube-based piezoresistive strain sensor is developed via the direct ink writing based embedded 3D printing method. The optimum weight concentration range of carbon nanotubes in the nanocomposite inks, appropriate for embedded 3D printing, is identified. Samples with complex 2D and 3D geometries are printed to demonstrate the manufacturing capabilities of the embedded printing process. The sensitivity of the piezoresistive strain sensor is optimized by determining the ideal nanofiller concentration, curing temperature, and nozzle size to produce the highest gauge factor in a wide strain range. The piezoresistive and mechanical properties of the optimized sensors are fully characterized to verify the suitability for skin-attachable strain sensing applications. The developed sensors have a wide sensing range, high sensitivity, and minimal strain rate dependence. In addition, their low elasticity and high biocompatibility allow them to be comfortably bonded on the human skin.

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