scholarly journals Development and Characterization of Fiber-Based Pressure Sensors

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 746
Author(s):  
Justus Landsiedel ◽  
Tung Pham ◽  
Thomas Bechtold
Keyword(s):  
Low Cost ◽  
Pressure Sensors ◽  
The Body ◽  
Capacitive Sensors ◽  
Pressure Sensitive ◽  
Promising Strategy ◽  
Alternative Approaches ◽  
Easy Integration ◽  
Sensitive Variable

The integration of strand-based pressure sensors directly into woven textiles is a promising strategy to maintain textile properties, such as the flexibility, and to functionalize fabrics. The development of capacitive sensing elements is often based on the construction of laminates, which adversely affect the flexibility and thickness of textiles. In this paper, we present two alternative approaches by manufacturing cylindrical, pressure-sensitive, variable capacitors and twisted strand-based capacitive sensors. They lead to an easy integration method, where sensors can either be embedded or used to construct the body of textiles. In the cause of these studies, SBR/gelatin has been found to be a very useful pressure sensitive insulation system for the production of low cost capacitive sensors.

scholarly journals Temperature measurement performance of silicon piezoresistive MEMS pressure sensors for industrial applications

2015 ◽  
Vol 28 (1) ◽  
pp. 123-131 ◽  
Author(s):  
Milos Frantlovic ◽  
Ivana Jokic ◽  
Zarko Lazic ◽  
Branko Vukelic ◽  
Marko Obradov ◽  
...  
Keyword(s):  
Temperature Measurement ◽  
Low Cost ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Correction Method ◽  
Industrial Applications ◽  
Sensor Applications ◽  
Piezoresistive Pressure Sensors ◽  
Mems Pressure Sensors

Temperature and pressure are the most common parameters to be measured and monitored not only in industrial processes but in many other fields from vehicles and healthcare to household appliances. Silicon microelectromechanical (MEMS) piezoresistive pressure sensors are the first and the most successful MEMS sensors, offering high sensitivity, solid-state reliability and small dimensions at a low cost achieved by mass production. The inherent temperature dependence of the output signal of such sensors adversely affects their pressure measurement performance, necessitating the use of correction methods in a majority of cases. However, the same effect can be utilized for temperature measurement, thus enabling new sensor applications. In this paper we perform characterization of MEMS piezoresistive pressure sensors for temperature measurement, propose a sensor correction method, and demonstrate that the measurement error as low as ? 0.3?C can be achieved.

scholarly journals Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

2018 ◽  
Vol 63 (8) ◽  
pp. 754 ◽  
Author(s):  
A. Hashim ◽  
A. Hadi
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Properties ◽  
Low Cost ◽  
Metal Oxide Nanoparticles ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Oxide Nanoparticles ◽  
Ac Electrical Conductivity ◽  
Dc Electrical Conductivity ◽  
Pressure Sensitive

This paper aims to the preparation of novel pressure-sensitive nanocomposites with low cost, light weight, and good sensitivity. The nanocomposites of polyvinyl alcohol, polyacrylic acid, and lead oxide nanoparticles have been investigated. The dielectric properties and dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites have been studied. The dielectric properties of nanocomposites were measured in the frequency range (100 Hz–5 MHz). The experimental results showed that the dielectric constant and dielectric loss of (PVA–PAA–PbO2) nanocomposites decrease, as the frequency increases, and they increase with the concentrations of PbO2 nanoparticles. The ac electrical conductivity of (PVA–PAA–PbO2) nanocomposites increases with the frequency and the concentrations of PbO2 nanoparticles. The dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites also increases with the concentrations of PbO2 nanoparticles. The application of pressure-sensitive nanocomposites has been examined in the pressure interval (60–200) bar. The results showed that the electrical resistance of (PVA–PAA–PbO2) pressure-sensitive nanocomposites decreases, as the compressive stress increases. The (PVA–PAA–PbO2) nanocomposites have high sensitivity to pressure.

scholarly journals Recent Progress of Miniature MEMS Pressure Sensors

Micromachines ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 56 ◽  
Author(s):  
Peishuai Song ◽  
Zhe Ma ◽  
Jing Ma ◽  
Liangliang Yang ◽  
Jiangtao Wei ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Microelectromechanical Systems ◽  
Low Cost ◽  
Pressure Sensors ◽  
Consumer Electronics ◽  
Limited Region ◽  
Pressure Sensitive ◽  
Inner Diameter ◽  
Implantable Pressure Sensor ◽  
Mems Pressure Sensors

Miniature Microelectromechanical Systems (MEMS) pressure sensors possess various merits, such as low power consumption, being lightweight, having a small volume, accurate measurement in a space-limited region, low cost, little influence on the objects being detected. Accurate blood pressure has been frequently required for medical diagnosis. Miniature pressure sensors could directly measure the blood pressure and fluctuation in blood vessels with an inner diameter from 200 to 1000 μm. Glaucoma is a group of eye diseases usually resulting from abnormal intraocular pressure. The implantable pressure sensor for real-time inspection would keep the disease from worsening; meanwhile, these small devices could alleviate the discomfort of patients. In addition to medical applications, miniature pressure sensors have also been used in the aerospace, industrial, and consumer electronics fields. To clearly illustrate the “miniature size”, this paper focuses on miniature pressure sensors with an overall size of less than 2 mm × 2 mm or a pressure sensitive diaphragm area of less than 1 mm × 1 mm. In this paper, firstly, the working principles of several types of pressure sensors are briefly introduced. Secondly, the miniaturization with the development of the semiconductor processing technology is discussed. Thirdly, the sizes, performances, manufacturing processes, structures, and materials of small pressure sensors used in the different fields are explained in detail, especially in the medical field. Fourthly, problems encountered in the miniaturization of miniature pressure sensors are analyzed and possible solutions proposed. Finally, the probable development directions of miniature pressure sensors in the future are discussed.

scholarly journals Characterization of organic solar cells using semiconducting polymers with different bandgaps

2019 ◽  
Vol 39 (7) ◽  
pp. 636-641 ◽  
Author(s):  
Ismail Borazan ◽  
Yasin Altin ◽  
Ali Demir ◽  
Ayse Celik Bedeloglu
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
Low Cost ◽  
Wide Bandgap ◽  
Semiconducting Polymers ◽  
Morphological Properties ◽  
Low Bandgap ◽  
Absorbing Layer ◽  
Easy Integration

Abstract Polymer-based organic solar cells are of great interest as they can be produced with low-cost techniques and also have many interesting features such as flexibility, graded transparency, easy integration, and lightness. However, conventional wide bandgap polymers used for the light-absorbing layer significantly affect the power conversion efficiency of organic solar cells because they collect sunlight in a given spectrum range and due to their limited stability. Therefore, in this study, polymers with different bandgaps were used, which could allow for the production of more stable and efficient organic solar cells: P3HT as the wide bandgap polymer, and PTB7 and PCDTBT as low bandgap polymers. These polymers with different bandgaps were combined with PCBM to obtain increased efficiency and optimum photoactive layer in the organic solar cell. The obtained devices were characterized by measuring optical, photoelectrical, and morphological properties. Solar cells using the PTB7 and PCDTBT polymers had more rough surfaces than the reference cell using P3HT. The use of low-bandgap polymers improved Isc significantly, and when combined with P3HT, a higher Voc was obtained.

scholarly journals Development and Characterization of a Low-Cost Sensors System for an Acoustic Test Bench

Sensors ◽  
2020 ◽  
Vol 20 (22) ◽  
pp. 6663
Author(s):  
Ciro Moreno-Ramírez ◽  
Carmen Iniesta ◽  
Alejandro González ◽  
José Luis Olazagoitia
Keyword(s):  
Test Bench ◽  
Mechanical Design ◽  
Dynamic Pressure ◽  
Low Cost ◽  
Pressure Sensors ◽  
Acquisition System ◽  
Sampling System ◽  
Thermoacoustic Engines ◽  
And Control

Existing acoustic test benches are usually costly devices based on proprietary designs, sensors, and acquisition devices. In this paper, a low-cost test bench for acoustic purposes is introduced. The design of the test bench takes into account not only the low-cost mechanical design, but also uses low-cost sensors and control boards. This test bench has been designed for a range of signals compatible with those used by thermoacoustic engines, but it can be useful for applications with similar requirements. Taking advantage of an auxiliary pressure reference, low-cost unidirectional differential pressure sensors can be used to significantly increase the accuracy of the sampling system. The acoustic and mechanical design and development are presented along with the sampling system and the sensors arrangement implemented. Both the sensor and sampling system are evaluated by comparison with a high-fidelity sound acquisition system. An unexpected effect on the time error values distribution of the low-cost acquisition system is found and described. Finally, the errors introduced by the system and the sensors in terms of time and pressure sampling are characterized. As a result, the low-cost system’s accuracy has been satisfactory assessed and validated for the conditions expected in thermoacoustic experiments in terms of frequency and dynamic pressure.

scholarly journals A Low Cost Negative Pressure Wound Therapy Based on Arduino

2020 ◽  
Vol 2 (2) ◽  
pp. 68-73
Author(s):  
Fikri Fahriansyah Pramono ◽  
Sari Luthfiyah ◽  
Triana Rahmawati ◽  
Nur Hasanah Ahniar
Keyword(s):  
Negative Pressure ◽  
Negative Pressure Wound Therapy ◽  
Low Cost ◽  
Healing Process ◽  
Pressure Sensors ◽  
The Body ◽  
Wound Therapy ◽  
Diabetic Ulcers ◽  
Susceptibility To Infection ◽  
Life Patterns

Instant life patterns and eating patterns and inappropriate exercise schedules are thought to be one of the causes of the increasing number of diabetes mellitus. Complications that can be caused by this disease are in the form of excessive susceptibility to infection, so that it develops into diabetic ulcers and can lead to amputations in these parts of the body. The purpose of this study is to design a tool used to treat diabetic ulcers. The contribution of this study is that the system can help remove fluid from the wound with controlled suction pressure so that it can facilitate the healing process faster. This Negative Pressure Wound Therapy (NPWT) tool works based on negative pressure from the vacuum motor by utilizing MPXV4115VC6U and MPXV5050VC6T1 pressure sensors at a pressure limit of 0 to -350 mmHg. Using an Arduino microcontroller for data processing, it will then be displayed on the 2x16 LCD. The MPX4115VC6U sensor produces a pressure of -55.97 mmHg when setting -50 mmHg and the resulting output is 3.32 volts, while the MPXV5050VC6T1 sensor produces a pressure of 51.18 mmHg at a setting of 50 mmHg and the resulting output is 3.18 volts, from the above data it can be seen if the MPX5050VC6TI sensor has a smaller error given

scholarly journals Review on Conductive Polymer/CNTs Nanocomposites Based Flexible and Stretchable Strain and Pressure Sensors

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 341
Author(s):  
Olfa Kanoun ◽  
Ayda Bouhamed ◽  
Rajarajan Ramalingame ◽  
Jose Roberto Bautista-Quijano ◽  
Dhivakar Rajendran ◽  
...  
Keyword(s):  
Low Cost ◽  
Conductive Polymer ◽  
Pressure Sensors ◽  
Strain Sensors ◽  
Special Focus ◽  
Future Developments ◽  
Sensor Properties ◽  
Different Shapes ◽  
Easy Integration ◽  
Review Current

In the last decade, significant developments of flexible and stretchable force sensors have been witnessed in order to satisfy the demand of several applications in robotic, prosthetics, wearables and structural health monitoring bringing decisive advantages due to their manifold customizability, easy integration and outstanding performance in terms of sensor properties and low-cost realization. In this paper, we review current advances in this field with a special focus on polymer/carbon nanotubes (CNTs) based sensors. Based on the electrical properties of polymer/CNTs nanocomposite, we explain underlying principles for pressure and strain sensors. We highlight the influence of the manufacturing processes on the achieved sensing properties and the manifold possibilities to realize sensors using different shapes, dimensions and measurement procedures. After an intensive review of the realized sensor performances in terms of sensitivity, stretchability, stability and durability, we describe perspectives and provide novel trends for future developments in this intriguing field.

Design, Fabrication and Characterization of Ultra Miniature Piezoresistive Pressure Sensors for Medical Implants

2011 ◽  
Vol 254 ◽  
pp. 94-98 ◽  
Author(s):  
Li Shiah Lim ◽  
Woo Tae Park ◽  
Liang Lou ◽  
Han Hua Feng ◽  
Pushpapraj Singh
Keyword(s):  
Pressure Sensor ◽  
Biomedical Applications ◽  
Low Cost ◽  
Silicon Nanowire ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Medical Implants ◽  
Mems Technology ◽  
Piezoresistive Pressure Sensors

Pressure sensors using MEMS technology have been advanced due to their low cost, small size and high sensitivity, which is an advantage for biomedical applications. In this paper,silicon nanowire was proposed to be used as the piezoresistors due to the high sensitivity [1][2].The sensors were designed, and characterized for the use of medical devices for pressure monitoring. The pressure sensor size is 2mm x 2mm with embedded SiNWs of 90nm x150nm been fabricated. Additionally, the sensitivity of 0.0024 Pa-1 pressure sensor has been demonstrated.

Studies on the Characterization of Factor VIII and a Co-factor VIII

1974 ◽  
Vol 31 (02) ◽  
pp. 328-338
Author(s):  
M. M. P Paulssen ◽  
H. L. M. A Vandenbussche-Scheffers ◽  
P. B Spaan ◽  
T de Jong ◽  
M. C Planje
Keyword(s):  
Molecular Weight ◽  
Factor Viii ◽  
The Body ◽  
Haemophilia A ◽  
Von Willebrand's Disease ◽  
Von Willebrand’S Disease ◽  
Polysaccharide Content ◽  
Plasma Factor ◽  
Two Factors

SummaryFactor VIII occurs in the body in two different forms. In lymph factor VIII is bound to chylomicra. In plasma, factor VIII is bound to a protein.After delipidation of chylomicra we obtained a glycoprotein with a high polysaccharide content and a molecular weight of approx. 160,000.In plasma, factor VIII is attached to a protein which is present in normal concentrations in plasma of patients with haemophilia A and in serum (co-factor VIII).This factor is deficient in both the plasma and the serum of patients with von Willebrand’s disease.The binding between factor VIII and co-factor VIII is reversible.Some properties of these two factors are described.

The Sober Bacchae: Dance as Phenomenal Limitation in Nietzsche

2019 ◽  
Vol 37 (1) ◽  
pp. 59-76
Author(s):  
Monique Lyle
Keyword(s):  
World View ◽  
The Body ◽  
Specific Function ◽  
Alain Badiou ◽  
Classical Greece ◽  
Birth Of Tragedy

This essay seeks to dispel entrenched critical opinion regarding dance across Nietzsche's writings as representative of Dionysian intoxication alone. Taking as its prompt the riposte of Alain Badiou, ‘Nietzsche is miles away from any doctrine of dance as a primitive ecstasy’ and ‘dance is in no way the liberated bodily impulse, the wild energy of the body’, the essay uncovers the ties between dance and Apollo in the Nietzschean theory of art while qualifying dance's relation to Dionysus. Primarily through an analysis of The Dionysiac World View and The Birth of Tragedy, the essay seeks to illuminate enigmatic statements about dance in Nietzsche (‘in dance the greatest strength is only potential, although it is betrayed by the suppleness of movement’ and ‘dance is the preservation of orderly measure’). It does this through an elucidation of the specific function of dance in Nietzsche's interpretation of classical Greece; via an assessment of the difficulties associated with the Nietzschean understanding of the bacchanal; and lastly through an analysis of Nietzsche's characterization of dance as a symbol. The essay culminates in a discussion of dance's ties to Nietzschean life affirmation; here the themes of physico-phenomenal existence, joy and illusion in Nietzsche are surveyed.

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