Miniaturized Sensors Employing Micro- and Nanotechnologies

2008 ◽  
Author(s):  
Kenneth J. Loh ◽  
Jerome P. Lynch
Keyword(s):  
Miniaturized Sensors

Use of Miniaturized Sensors to Optimize Cleaning Operations for In-Line Inspection of a Subsea Pipeline

2018 ◽  
Author(s):  
Alberto G. Di Lullo ◽  
Claudio Passucci ◽  
Keith C. Hester ◽  
Raffaele Zaffaroni ◽  
Robert Reinhart
Keyword(s):  
Subsea Pipeline ◽  
Miniaturized Sensors

MODELING AND NUMERICAL SIMULATION OF AN ALGORITHM FOR THE INERTIAL SENSORS ERRORS REDUCTION AND FOR THE INCREASE OF THE STRAP-DOWN NAVIGATOR REDUNDANCY DEGREE IN A LOW COST ARCHITECTURE

2010 ◽  
Vol 34 (1) ◽  
pp. 1-16 ◽  
Author(s):  
Lucian T. Grigorie ◽  
Ruxandra M. Botez
Keyword(s):  
Navigation System ◽  
Inertial Navigation System ◽  
Lower Cost ◽  
Inertial Sensors ◽  
Low Cost ◽  
Inertial Navigation ◽  
Noise Power ◽  
Integration Algorithm ◽  
The Cost ◽  
Miniaturized Sensors

In this paper, an algorithm for the inertial sensors errors reduction in a strap-down inertial navigation system, using several miniaturized inertial sensors for each axis of the vehicle frame, is conceived. The algorithm is based on the idea of the maximum ratio-combined telecommunications method. We consider that it would be much more advantageous to set a high number of miniaturized sensors on each input axis of the strap-down inertial system instead of a single one, more accurate but expensive and with larger dimensions. Moreover, a redundant system, which would isolate any of the sensors in case of its malfunctioning, is obtained. In order to test the algorithm, Simulink code is used for algorithm and for the acceleration inertial sensors modeling. The Simulink resulted sensors models include their real errors, based on the data sheets parameters, and were conceived based on the IEEE analytical standardized accelerometers model. An integration algorithm is obtained, in which the signal noise power delivered to the navigation processor, is reduced, proportionally with the number of the integrated sensors. At the same time, the bias of the resulted signal is reduced, and provides a high redundancy degree for the strap-down inertial navigation system at a lower cost than at the cost of more accurate and expensive sensors.

Miniaturized sensors for the viscosity and density of liquids-performance and issues

2010 ◽  
Vol 57 (1) ◽  
pp. 111-120 ◽  
Author(s):  
B. Jakoby ◽  
R. Beigelbeck ◽  
F. Keplinger ◽  
F. Lucklum ◽  
A. Niedermayer ◽  
...  
Keyword(s):  
Miniaturized Sensors

Gly-Gly-His Immobilized On Monolayer Modified Back-Side Contact Miniaturized Sensors for Complexation of Copper Ions

2013 ◽  
Vol 25 (6) ◽  
pp. 1461-1471 ◽  
Author(s):  
Urszula E. Wawrzyniak ◽  
Patrycja Ciosek ◽  
Michał Zaborowski ◽  
Guozhen Liu ◽  
J. Justin Gooding
Keyword(s):  
Copper Ions ◽  
Back Side ◽  
Miniaturized Sensors

scholarly journals Design of Miniaturized Sensors for a Mission-Oriented UAV Application: A New Pathway for Early Warning

2021 ◽  
Vol 11 (4) ◽  
pp. 435-444
Author(s):  
Daniele Di Giovanni ◽  
Francesca Fumian ◽  
Andrea Chierici ◽  
Mattia Bianchelli ◽  
Luca Martellucci ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Critical Infrastructures ◽  
Dual Use ◽  
Industrial Accidents ◽  
Manual Operation ◽  
Experimental Campaign ◽  
Technological Developments ◽  
Sampling Systems ◽  
Military Teams ◽  
Miniaturized Sensors

In recent decades, the increasing threats associated with Chemical and Radiological (CR) agents prompted the development of new tools to detect and collect samples without putting in danger first responders inside contaminated areas. A particularly promising branch of these technological developments relates to the integration of different detectors and sampling systems with Unmanned Aerial Vehicles (UAV). The adoption of this equipment may bring significant benefits for both military and civilian implementations. For instance, instrumented UAVs could be used in support of specialist military teams such as Sampling and Identification of Biological, Chemical and Radiological Agents (SIBCRA) team, tasked to perform sampling in contaminated areas, detecting the presence of CR substances in field and then confirming, collecting and evaluating the effective threats. Furthermore, instrumented UAVs may find dual-use application in the civil world in support of emergency teams during industrial accidents and in the monitoring activities of critical infrastructures. Small size drones equipped with different instruments for detection and collection of samples may enable, indeed, several applications, becoming a tool versatile and easy to use in different fields, and even featuring equipment normally utilized in manual operation. The authors hereby present the design of miniaturized sensors for a mission-oriented UAV application and the preliminary results from an experimental campaign performed in 2020.

scholarly journals Field Evaluation of Low-Cost Particulate Matter Sensors in Beijing

Sensors ◽  
2020 ◽  
Vol 20 (16) ◽  
pp. 4381 ◽  
Author(s):  
Han Mei ◽  
Pengfei Han ◽  
Yinan Wang ◽  
Ning Zeng ◽  
Di Liu ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Low Cost ◽  
Field Evaluation ◽  
Dust Storms ◽  
Relative Bias ◽  
Miniaturized Sensors ◽  
Beijing China ◽  
Pm2.5 Concentration

Numerous particulate matter (PM) sensors with great development potential have emerged. However, whether the current sensors can be used for reliable long-term field monitoring is unclear. This study describes the research and application prospects of low-cost miniaturized sensors in PM2.5 monitoring. We evaluated five Plantower PMSA003 sensors deployed in Beijing, China, over 7 months (October 2019 to June 2020). The sensors tracked PM2.5 concentrations, which were compared to the measurements at the national control monitoring station of the Ministry of Ecology and Environment (MEE) at the same location. The correlations of the data from the PMSA003 sensors and MEE reference monitors (R2 = 0.83~0.90) and among the five sensors (R2 = 0.91~0.98) indicated a high accuracy and intersensor correlation. However, the sensors tended to underestimate high PM2.5 concentrations. The relative bias reached −24.82% when the PM2.5 concentration was >250 µg/m3. Conversely, overestimation and high errors were observed during periods of high relative humidity (RH > 60%). The relative bias reached 14.71% at RH > 75%. The PMSA003 sensors performed poorly during sand and dust storms, especially for the ambient PM10 concentration measurements. Overall, this study identified good correlations between PMSA003 sensors and reference monitors. Extreme field environments impact the data quality of low-cost sensors, and future corrections remain necessary.

scholarly journals Imprinted Polymeric Beads-Based Screen-Printed Potentiometric Platforms Modified with Multi-Walled Carbon Nanotubes (MWCNTs) for Selective Recognition of Fluoxetine

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 572 ◽  
Author(s):  
Saad S.M. Hassan ◽  
Ayman H. Kamel ◽  
Abd El-Galil E. Amr ◽  
Heba M. Hashem ◽  
E.M. Abdel Bary
Keyword(s):  
Pharmaceutical Preparations ◽  
Pharmaceutical Formulations ◽  
Local Market ◽  
Multi Walled Carbon Nanotube ◽  
Multi Walled Carbon Nanotubes ◽  
Nernstian Slope ◽  
Recovery Percentage ◽  
Walled Carbon Nanotubes ◽  
Miniaturized Sensors ◽  
Screen Printed

Herein, we present a new validated potentiometric method for fluoxetine (FLX) drug monitoring. The method is based on the integration of molecular imprinting polymer (MIP) beads as sensory elements with modified screen-printed solid contact ion-selective electrodes (ISEs). A multi-walled carbon nanotube (MWCNT) was used as a nanomaterial for the ion-to-electron transduction process. The prepared MIP beads depend on the use of acrylamide (AAm) and ethylene glycol dimethacrylic acid (EGDMA) as a functional monomer and cross-linker, respectively. The sensor revealed a stable response with a Nernstian slope of 58.9 ± 0.2 mV/decade and a detection limit of 2.1 × 10−6 mol/L in 10 mmol/L acetate buffer of pH 4.5. The presented miniaturized sensors revealed good selectivity towards FLX over many organic and inorganic cations, as well as some additives encountered in the pharmaceutical preparations. Repeatability, reproducibility and stability have been studied to evaluate the analytical features of the presented sensors. These sensors were successfully applied for FLX assessment in different pharmaceutical formulations collected from the Egyptian local market. The obtained results agreed well with the acceptable recovery percentage and were better than those obtained by other previously reported routine methods.

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