Pressure Sensing Fabric

2006 ◽  
Vol 920 ◽  
Author(s):  
Zhang Hui ◽  
Tao Xiao Ming ◽  
Yu Tong Xi ◽  
Li Xin Sheng
Keyword(s):  
Pressure Sensor ◽  
Fabrication Process ◽  
Sensing Element ◽  
Large Area ◽  
Pressure Sensing ◽  
Conductive Yarns ◽  
Flexible Pressure Sensor ◽  
Fabric Surface ◽  
The Cost ◽  
Resistive Grids

AbstractThis paper presents an approach for decoding the pressure information exerted over a piece of fabric by means of resistive sensing. The proposed sensor includes a distributed resistive grids constructed by two systems of orthogonally contacted electrical conductive yarns, with no external sensing element to be attached on the fabric. Since the conductive yarns serve as the sensing and wiring elements simultaneously, this design simplifies the fabrication process, reduces the cost and makes the production of large area flexible pressure sensor possible. The location of the pressure applied on the fabric can be identified by detecting the position where the change of the resistances occurs between two embroidered yarns. Meanwhile, the magnitude of the pressure can be acquired by measuring the variations of the resistance. In order to eliminate the “crosstalk” effect between adjoining fibers, the yarns were separately wired on the fabric surface.

scholarly journals A Flexible and Highly Sensitive Piezoresistive Pressure Sensor Based on Micropatterned Films Coated with Carbon Nanotubes

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Jia-lin Yao ◽  
Xing Yang ◽  
Na Shao ◽  
Hui Luo ◽  
Ting Zhang ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Gas Sensing ◽  
Fluid Pressure ◽  
High Sensitivity ◽  
Sensing Element ◽  
Pressure Sensing ◽  
Piezoresistive Pressure Sensor ◽  
Highly Sensitive ◽  
Flexible Pressure Sensor ◽  
Low Consumption

Excellent flexibility, high sensitivity, and low consumption are essential characteristics in flexible microtube pressure sensing occasion, for example, implantable medical devices, industrial pipeline, and microfluidic chip. This paper reports a flexible, highly sensitive, and ultrathin piezoresistive pressure sensor for fluid pressure sensing, whose sensing element is micropatterned films with conductive carbon nanotube layer. The flexible pressure sensor, the thickness of which is 40 ± 10 μm, could be economically fabricated by using biocompatible polydimethylsiloxane (PDMS). Experimental results show that the flexible pressure sensor has high sensitivity (0.047 kPa−1in gas sensing and 5.6 × 10−3 kPa−1in liquid sensing) and low consumption (<180 μW), and the sensor could be used to measure the pressure in curved microtubes.

CMOS-MEMS Based Current Mirror MOSFET Embedded Pressure Sensor for Healthcare and Biomedical Applications

2013 ◽  
Vol 647 ◽  
pp. 315-320 ◽  
Author(s):  
Pradeep Kumar Rathore ◽  
Brishbhan Singh Panwar
Keyword(s):  
Pressure Sensor ◽  
Biomedical Applications ◽  
Circuit Simulation ◽  
Applied Pressure ◽  
Pressure Sensors ◽  
Cmos Technology ◽  
Current Mirror ◽  
Sensing Element ◽  
Pressure Sensing ◽  
Cmos Mems

This paper reports on the design and optimization of current mirror MOSFET embedded pressure sensor. A current mirror circuit with an output current of 1 mA integrated with a pressure sensing n-channel MOSFET has been designed using standard 5 µm CMOS technology. The channel region of the pressure sensing MOSFET forms the flexible diaphragm as well as the strain sensing element. The piezoresistive effect in MOSFET has been exploited for the calculation of strain induced carrier mobility variation. The output transistor of the current mirror forms the active pressure sensing MOSFET which produces a change in its drain current as a result of altered channel mobility under externally applied pressure. COMSOL Multiphysics is utilized for the simulation of pressure sensing structure and Tspice is employed to evaluate the characteristics of the current mirror pressure sensing circuit. Simulation results show that the pressure sensor has a sensitivity of 10.01 mV/MPa. The sensing structure has been optimized through simulation for enhancing the sensor sensitivity to 276.65 mV/MPa. These CMOS-MEMS based pressure sensors integrated with signal processing circuitry on the same chip can be used for healthcare and biomedical applications.

A Design of Amplifying Circuit Based on Pt Resistance Strain Pressure Sensor

2011 ◽  
Vol 217-218 ◽  
pp. 824-829
Author(s):  
Yao Hong Shi ◽  
Zhan Zhao ◽  
Zhen Fang ◽  
Dao Qu Geng ◽  
Yun Dong Xuan
Keyword(s):  
Pressure Sensor ◽  
Atmospheric Pressure ◽  
Bridge Circuit ◽  
Low Cost ◽  
Resistance Strain ◽  
Sensing Element ◽  
Digital Potentiometer ◽  
Chinese Academy Of Sciences ◽  
The Cost ◽  
Academy Of Sciences

This topic takes the miniature Pt resistance strain pressure sensor made by Institute of Electronics, Chinese Academy of Sciences, as the core sensing element, and designs corresponding high-precision, low cost, low power amplifying circuit so as to realize accurate detection of atmospheric pressure in time. In this topic, a new design of amplifying circuit is taken, which first connects the digital potentiometer to the bridge circuit to adjust its balance, and then amplifies the output signal of the bridge circuit once to ideal value. This design not only meets the requirement of measurement, but also is feasible and reduces the cost. At the same time, in order to improve the precision of the potentiometer adjusting the bridge balancing, paralleled resistances are creatively used beside the digital potentiometer and its influence to the bridge balance adjustment and the accuracy of the bridge measurement is analyzed in detail.

scholarly journals A silver nanowire-based flexible pressure sensor to measure the non-nutritive sucking power of neonates

2020 ◽  
Vol 8 (1) ◽  
Author(s):  
Jean G. de Oliveira ◽  
Tausif Muhammad ◽  
Sohee Kim
Keyword(s):  
Preterm Infants ◽  
Pressure Sensor ◽  
Mechanical Stability ◽  
Resistance To Change ◽  
Silver Nanowires ◽  
Silver Nanowire ◽  
Sensing Element ◽  
Term Infants ◽  
Nutritive Sucking ◽  
Flexible Pressure Sensor

Abstract Preterm infants are prone to have higher risks of morbidity, disability and developmental delay compared to term infants. The primitive reflexes, inborn behaviors found in early life development, are shown to be a good tool to assess the integrity of the central nervous system of infants and to predict potential malfunctions. Among these reflexes, the non-nutritive sucking reflex plays an important role in indicating congenital abnormalities in brain development and feeding readiness, especially for premature infants. Conventionally, pediatricians evaluate the oral sucking power qualitatively based on their experiences, by using a gloved finger put inside the infant’s mouth. Thus, more quantitative solutions to assess the sucking power of preterm infants are necessary to support healthcare professionals in their evaluation procedures. Here, we developed a silver nanowire (AgNW)-based flexible pressure sensor to measure the non-nutritive sucking power of infants. The flexible sensor was fabricated using silver nanowires deposited on polydimethylsiloxane (PDMS) in a sandwich-like structure. The sensor based on the principle of strain gauge was attached to a ring-shaped connecting module, and then to a pacifier. The negative sucking pressure exerted by the infant deformed the sensor membrane, causing its electrical resistance to change without any contact between the infant’s mouth and the sensing element. The fabricated sensor was characterized and optimized to achieve both the suitable sensitivity and stability. Thanks to the excellent long-term electro-mechanical stability and high sensitivity, the developed sensor is expected to provide the means to quantitatively assess the non-nutritive sucking of infants, with a portable, low-cost, non-invasive and light-weight solution.

A do-it-yourself approach to achieving a flexible pressure sensor using daily available materials

2021 ◽  
Author(s):  
Zaihua Duan ◽  
Yadong Jiang ◽  
Qi Huang ◽  
Zhen Yuan ◽  
Qiuni Zhao ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Manufacturing Process ◽  
Pressure Sensing ◽  
Do It Yourself ◽  
Flexible Pressure Sensor ◽  
Sensing Performance

The pressure sensing performance of flexible pressure sensor has been developed rapidly in recent years, but it still suffers from the disadvantages of complex manufacturing process and high cost. Here,...

scholarly journals Combined Pressure Sensor With Enhanced Dynamic Range Based on Thin Films of Nanotubes and Graphite Nanobelts

2021 ◽  
Vol 1 ◽  
Author(s):  
Andrei Alaferdov ◽  
Ilya Vilkov ◽  
Boris Kaverin ◽  
Anatoly Ob´edkov ◽  
Stanislav Moshkalev
Keyword(s):  
Pressure Sensor ◽  
Carbon Nanostructures ◽  
Dynamic Range ◽  
Multiwall Carbon Nanotubes ◽  
Low Power Consumption ◽  
Pressure Sensing ◽  
Langmuir Blodgett ◽  
Healthcare Monitoring ◽  
Flexible Pressure Sensor ◽  
Multiwall Carbon

Herein, we demonstrate the prototype of a combined flexible pressure sensor based on ultrathin multiwall carbon nanotubes (MWCNTs) and graphite nanobelts (GNBs) films embedded in polydimethylsiloxane (PDMS). A simple and scalable modified Langmuir–Blodgett method was used for deposition of both MWCNT and GNB films. The use of two types of carbon nanostructures (nanotubes and GNBs) with distinctly different mechanical properties allowed obtaining enhanced dynamic range for pressure sensing. Short response time, good sensibility and flexibility, and low power consumption for enhanced pressure range make possible applications of the sensor for healthcare monitoring and as a component in the human–machine interfaces application.

scholarly journals A Carbon Flower Based Flexible Pressure Sensor Made from Large‐Area Coating

2020 ◽  
Vol 7 (18) ◽  
pp. 2000875
Author(s):  
Stephen JK O'Neill ◽  
Huaxin Gong ◽  
Naoji Matsuhisa ◽  
Shucheng Chen ◽  
Hanul Moon ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Large Area ◽  
Flexible Pressure Sensor
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