Characterization of Circumference and Internal Pressure of a Penis by Using Stretchable Capacitive Sensors and a Penis Dummy for Diagnosing Erectile Dysfunction

This work presents an innovative application of carbon dots (Cdots) nanoparticles as sensing layer for relative humidity detection. The developed sensor is based on interdigitated capacitive electrodes screen printed on a flexible transparent polyethylene terephthalate (PET) film. Cdots are deposited on top of these electrodes. An exhaustive characterization of the nanoparticles has been conducted along with the fabrication of the sensor structure. The accompanied experiments give all the sensibility to the Cdots, showing its dependence with temperature and exciting frequency. To the best of our knowledge, this work paves the path to the use of these kind of nanoparticles in printed flexible capacitive sensors aimed to be employed in the continuously expanding Internet of Things ecosystem.

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Experimental Characterization of the Structural Deformation of Type IV Pressure Vessels Subjected to Internal Pressure

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.809.47 ◽

2019 ◽

Vol 809 ◽

pp. 47-52 ◽

Cited By ~ 1

Author(s):

Martin Nebe ◽

Daniel Maraite ◽

Clemens Braun ◽

Daniel Hülsbusch ◽

Frank Walther

Keyword(s):

Internal Pressure ◽

Test Chamber ◽

Simulation Models ◽

Cost Effective ◽

Pressure Vessels ◽

Structural Deformation ◽

Experimental Characterization ◽

Type Iv ◽

Structural Mass

The investigations deal with the experimental characterization of the structural deformation of type IV pressure vessels subjected to internal pressure. For the widespread use of hydrogen technology in transport industries, the development of cost-effective storage systems is a crucial step. State of the art in the field of hydrogen storage are type IV pressure vessels, which consist of a polymeric liner and an enforcing winding of carbon fiber-reinforced plastic (CFRP). For the development of material-optimized and high-safety pressure vessels, the acquisition of reliable experimental data in order to validate numerical simulations is a necessity. In a specially designed test chamber subscale vessels are clamped and subjected to internal pressure. At defined pressure stages the vessel’s deformation is recorded and analyzed. Consequently, the overall structural deformation is assessed with regard to the used structural mass, the burst pressure and the resulting failure. The results can be used for structure optimization purposes as well as for the optimization of numerical simulation models.

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Characterization of Sealing Behavior of Gaskets for the Leak Rate Based Design of Gasketed Bolted Flanged Connections

Volume 2: Computer Applications/Technology and Bolted Joints ◽

10.1115/pvp2008-61465 ◽

2008 ◽

Author(s):

Takashi Kobayashi

Keyword(s):

Internal Pressure ◽

Testing Procedure ◽

Test Method ◽

Leak Rate ◽

Test Results ◽

Japanese Industrial Standard ◽

Sealing Performance ◽

Stress Levels ◽

Spiral Wound

This paper discusses the sealing behavior of gaskets according to the gasket testing procedure HPIS Z104 established in Japan. The testing procedure consists of eleven gasket stress levels while the internal pressure is constant. It takes about 3 hours to complete one test, which is acceptable for gasket manufacturers. The test method is going to be effective as the Japanese Industrial Standard (JIS) soon. Several sheet gaskets and spiral wound gaskets were tested based on the test method HPIS Z104 and test results are compared and discussed in this paper. Based on the test results, experimental formulas are proposed to approximate the sealing behavior of gaskets. It is shown that the sealing behavior of gaskets can be well characterized using the proposed testing procedure and the experimental formulas. The formulas have the possibility of application to the design of gasketed bolted flanged connections. It is also shown that the sealing performance of spiral wound gaskets with graphite and PTFE fillers is as good as that of sheet gaskets under an equal gasket load.

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Characterization of Large Area 4H-SiC and 6H-SiC Capacitive Devices at 600 °C

Materials Science Forum ◽

10.4028/www.scientific.net/msf.717-720.1187 ◽

2012 ◽

Vol 717-720 ◽

pp. 1187-1189

Author(s):

Ruby N. Ghosh ◽

Reza Loloee

Keyword(s):

High Temperature ◽

Field Effect ◽

Gate Oxide ◽

Voltage Characteristic ◽

Capacitive Sensors ◽

Large Area ◽

Signal Noise ◽

Capacitance Voltage ◽

Corrosive Environments

SiC based capacitive devices have the potential to operate in high temperature, chemically corrosive environments provided that the electrical integrity of the gate oxide and metallization can be maintained in these environments. We report on the performance of large area, up to 8 x 10-3 cm2, field-effect capacitive sensors fabricated on both the 4H and 6H polytypes at 600°C. Large area capacitors improve the signal/noise (S/N) ratio which is proportional to the slope of the capacitance-voltage characteristic. At 600 °C we obtain a S/N ~ 20. The device response is independent of polytype, either 4H or 6H-SiC. These results demonstrate the reliability of our field-effect structure, operating as a simple potentiometer at high temperature.

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A high-precision instrument for mapping of rotational errors in rotary stages

Journal of Synchrotron Radiation ◽

10.1107/s160057751401618x ◽

2014 ◽

Vol 21 (6) ◽

pp. 1367-1369 ◽

Cited By ~ 8

Author(s):

Weihe Xu ◽

Kenneth Lauer ◽

Yong Chu ◽

Evgeny Nazaretski

Keyword(s):

High Precision ◽

High Stability ◽

Three Dimensional ◽

Capacitive Sensors ◽

Precision Instrument ◽

X Ray ◽

Full Characterization ◽

Simultaneous Measurements ◽

Radial And Axial Displacements

A rotational stage is a key component of every X-ray instrument capable of providing tomographic or diffraction measurements. To perform accurate three-dimensional reconstructions, runout errors due to imperfect rotation (e.g.circle of confusion) must be quantified and corrected. A dedicated instrument capable of full characterization and circle of confusion mapping in rotary stages down to the sub-10 nm level has been developed. A high-stability design, with an array of five capacitive sensors, allows simultaneous measurements of wobble, radial and axial displacements. The developed instrument has been used for characterization of two mechanical stages which are part of an X-ray microscope.

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