scholarly journals PROSPECTIVE ELASTO-PLASTIC PRESSURE SENSORS - All-Elasto-Plastic Polyisoprene/Nanostructured Carbon Pressure Sensing Element

2009 ◽  
Keyword(s):  
Pressure Sensors ◽  
Nanostructured Carbon ◽  
Sensing Element ◽  
Pressure Sensing

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.

Thermal Stress Analysis for Differential Pressure Sensors

2005 ◽  
Author(s):  
J. Albert Chiou ◽  
Steven Chen
Keyword(s):  
Thermal Stress ◽  
Thermal Stresses ◽  
Thermal Hysteresis ◽  
Pressure Sensors ◽  
Experimental Tests ◽  
Temperature Cycling ◽  
Finite Element Analyses ◽  
Sensing Element ◽  
Pressure Sensing ◽  
Temperature Environment

Pressure sensors should be capable of measuring pressure accurately and consistently without being disturbed by the temperature environment. With silicon’s better thermal material properties, silicon micormachined pressure sensors are mass-produced and widely used. However, a silicon pressure sensing element has to be packaged and protected. The thermal mismatching between the sensing element and packaging may generate stresses on the transducer of a sensing element and create thermal hysteresis and voltage shift during temperature cycling. The induced thermal stresses can easily deteriorate performance reliability. In this paper, finite element analyses and experimental tests were conducted to reduce the thermal stress and thermal hysteresis. With the glass substrate to isolate the stress from plastic housing, the thermal hysteresis can be significantly improved. The die placement and dispense pattern can be also optimized to further improve the thermal hysteresis.

Ultrasensitive, flexible, and low-cost nanoporous piezoresistive composites for tactile pressure sensing

Nanoscale ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 2779-2786 ◽  
Author(s):  
Jing Li ◽  
Santiago Orrego ◽  
Junjie Pan ◽  
Peisheng He ◽  
Sung Hoon Kang
Keyword(s):  
Carbon Nanotube ◽  
Polymer Composites ◽  
Low Cost ◽  
Pressure Sensors ◽  
Nanoporous Carbon ◽  
Pressure Sensing ◽  
Etching Method ◽  
Piezoresistive Pressure Sensors

We report a facile sacrificial casting–etching method to synthesize nanoporous carbon nanotube/polymer composites for ultra-sensitive and low-cost piezoresistive pressure sensors.

Flexible pressure sensing film based on ultra-sensitive SWCNT/PDMS spheres for monitoring human pulse signals

2015 ◽  
Vol 3 (27) ◽  
pp. 5436-5441 ◽  
Author(s):  
Yan-Long Tai ◽  
Zhen-Guo Yang
Keyword(s):  
Pressure Sensors ◽  
Pressure Sensing ◽  
Prosthetic Limbs ◽  
Electronic Skin ◽  
Essential Components ◽  
Biomedical Diagnostics ◽  
Healthcare Monitoring ◽  
Flexible Pressure Sensors ◽  
Human Healthcare

Flexible pressure sensors are essential components of an electronic skin for future attractive applications ranging from human healthcare monitoring to biomedical diagnostics to robotic skins to prosthetic limbs.

Multi length scale hierarchical architecture overcoming pressure sensing range-speed tradeoff for flexible pressure sensors

2021 ◽  
Author(s):  
Qiong Tian ◽  
Wenrong Yan ◽  
Tianding CHEN ◽  
Derek Ho
Keyword(s):  
Biomedical Applications ◽  
Pressure Sensors ◽  
Human Machine Interface ◽  
Hierarchical Architecture ◽  
Soft Robotics ◽  
Length Scale ◽  
Pressure Sensing ◽  
Sensing Range ◽  
Machine Interface ◽  
Flexible Pressure Sensors

Pressure sensing electronics have gained great attention in human-machine interface, soft robotics, and wearable biomedical applications. However, existing sensor architectures are inadequate in overcoming the classic tradeoff between sensing range,...

scholarly journals Effect of Weft Yarn on the Pressure Sensing Properties of Textile Pressure Sensors

2016 ◽  
Vol 72 (5) ◽  
pp. 120-125 ◽  
Author(s):  
Tetsuhiko Murakami ◽  
Atsuji Masuda ◽  
Mika Hirakue ◽  
Yoshiyuki Iemoto ◽  
Hideyuki Uematsu ◽  
...  
Keyword(s):  
Pressure Sensors ◽  
Weft Yarn ◽  
Pressure Sensing ◽  
Sensing Properties

scholarly journals B3.1 - Novel Silicon High Pressure Sensing Element

2009 ◽  
Author(s):  
Patrik Heinickel ◽  
Roland Werthschuetzky
Keyword(s):  
High Pressure ◽  
Sensing Element ◽  
Pressure Sensing

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.

Flexible hemispheric microarrays of highly pressure-sensitive sensors based on breath figure method

Nanoscale ◽  
2018 ◽  
Vol 10 (22) ◽  
pp. 10691-10698 ◽  
Author(s):  
Zhihui Wang ◽  
Ling Zhang ◽  
Jin Liu ◽  
Hao Jiang ◽  
Chunzhong Li
Keyword(s):  
Pressure Sensor ◽  
Pressure Sensors ◽  
Pressure Sensing ◽  
Sensing Range ◽  
Pressure Sensitive ◽  
Breath Figure ◽  
Breath Figure Method ◽  
Flexible Pressure Sensors

Flexible pressure sensors with interlocked hemispheric microstructures are prepared by a novel breath figure strategy. The subtle microstructure remarkably improves the sensitivity and pressure sensing range of the pressure sensor.

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