Development of a Highly Miniaturized PQT-Sensor for Monitoring and Diagnosing of Pneumatic Systems

2007 ◽  
Author(s):  
Christoph Sosna ◽  
Rainer Buchner ◽  
Walter Lang ◽  
Wolfgang Benecke ◽  
Christian Boehm ◽  
...  
Keyword(s):  
High Resolution ◽  
First Principles ◽  
High Performance ◽  
Low Cost ◽  
Fast Response ◽  
High Accuracy ◽  
Measuring Range ◽  
Micro Electro Mechanical Systems ◽  
Diagnostic Applications ◽  
Design Proposal

In this paper a feasibility study of a micromachined PQT-sensor for measurement of pressure (P), flow rate (Q), and temperature (T) for diagnostic applications in pneumatic systems is presented. As a low cost device this innovative PQT-sensor has to fulfill different kinds of criteria such as wide measuring range, fast response time, high resolution and high accuracy for diagnosing the health status of a pneumatic system. By using micro electro mechanical systems (MEMS) technologies small high-performance sensors were fabricated which fulfill all these criteria. At first, principles will be described that have been chosen for measurement of pressure, flow and temperature that will be used for the PQT-sensor. A design proposal for the sensor will be presented and verified with analytical calculations to show its applicability.

Novel ionic bioartificial muscles based on ionically crosslinked multi-walled carbon nanotubes-mediated bacterial cellulose membranes and PEDOT:PSS electrodes

2021 ◽  
Author(s):  
Yaofeng Wang ◽  
Fan Wang ◽  
Yang Kong ◽  
Lei Wang ◽  
Qinchuan Li
Keyword(s):  
Carbon Nanotubes ◽  
Bacterial Cellulose ◽  
Specific Capacitance ◽  
High Performance ◽  
Low Cost ◽  
Actuation Voltage ◽  
Fast Response ◽  
Bending Deformation ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Abstract High-performance bioartificial muscles with low-cost, large bending deformation, low actuation voltage, and fast response time have drawn extensive attention as the development of human-friendly electronics in recent years. Here, we report a high-performance ionic bioartificial muscle based on the bacterial cellulose (BC)/ionic liquid (IL)/multi-walled carbon nanotubes (MWCNT) nanocomposite membrane and PEDOT:PSS electrode. The developed ionic actuator exhibits excellent electro-chemo-mechanical properties, which are ascribed to its high ionic conductivity, large specific capacitance, and ionically crosslinked structure resulting from the strong ionic interaction and physical crosslinking among BC, IL, and MWCNT. In particular, the proposed BC-IL-MWCNT (0.10 wt%) nanocomposite exhibited significant increments of Young's modulus up to 75% and specific capacitance up to 77%, leading to 2.5 times larger bending deformation than that of the BC-IL actuator. More interestingly, bioinspired applications containing artificial soft robotic finger and grapple robot were successfully demonstrated based on high-performance BC-IL-MWCNT actuator with excellent sensitivity and controllability. Thus, the newly proposed BC-IL-MWCNT bioartificial muscle will offer a viable pathway for developing next-generation artificial muscles, soft robotics, wearable electronic products, flexible tactile devices, and biomedical instruments.

Low-Cost Receiver and Network Real-Time Kinematic Positioning for use in Connected and Autonomous Vehicles

2019 ◽  
Vol 72 (04) ◽  
pp. 917-930
Author(s):  
Fang-Shii Ning ◽  
Xiaolin Meng ◽  
Yi-Ting Wang
Keyword(s):  
Real Time ◽  
Autonomous Vehicles ◽  
High Performance ◽  
Low Cost ◽  
Satellite System ◽  
High Accuracy ◽  
Future Trend ◽  
Intelligent Transport System ◽  
Positioning System ◽  
Gnss Receiver

Connected and Autonomous Vehicles (CAVs) have been researched extensively for solving traffic issues and for realising the concept of an intelligent transport system. A well-developed positioning system is critical for CAVs to achieve these aims. The system should provide high accuracy, mobility, continuity, flexibility and scalability. However, high-performance equipment is too expensive for the commercial use of CAVs; therefore, the use of a low-cost Global Navigation Satellite System (GNSS) receiver to achieve real-time, high-accuracy and ubiquitous positioning performance will be a future trend. This research used RTKLIB software to develop a low-cost GNSS receiver positioning system and assessed the developed positioning system according to the requirements of CAV applications. Kinematic tests were conducted to evaluate the positioning performance of the low-cost receiver in a CAV driving environment based on the accuracy requirements of CAVs. The results showed that the low-cost receiver satisfied the “Where in Lane” accuracy level (0·5 m) and achieved a similar positioning performance in rural, interurban, urban and motorway areas.

scholarly journals Integrated High-Performance Platform for Fast Query Response in Big Data with Hive, Impala, and SparkSQL: A Performance Evaluation

2018 ◽  
Vol 8 (9) ◽  
pp. 1514 ◽  
Author(s):  
Bao Chang ◽  
Hsiu-Fen Tsai ◽  
Yun-Da Lee
Keyword(s):  
Big Data ◽  
Open Source Software ◽  
High Performance ◽  
Low Cost ◽  
Data Retrieval ◽  
Fast Response ◽  
Disk Cache ◽  
Memory Cache ◽  
Medium Enterprise ◽  
Effectiveness And Efficiency

This paper first integrates big data tools—Hive, Impala, and SparkSQL—which support SQL-like queries for rapid data retrieval in big data. The three introduced tools are not only suitable for operating in business intelligence to serve high-performance data retrieval, but they are also an open-source software solution with low cost for small-to-medium enterprise use. In practice, the proposed approach provides an in-memory cache and an in-disk cache to achieve a very fast response to a query if a cache hit occurs. Moreover, this paper develops so-called platform selection that is able to select the appropriate tool dealing with input query with effectiveness and efficiency. As a result, the speed of job execution of proposed approach using platform selection is 2.63 times faster than Hive in the Case 1 experiment, and 4.57 times faster in the Case 2 experiment.

scholarly journals Joule Heating-Induced Carbon Fibers for Flexible Fiber Supercapacitor Electrodes

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5255
Author(s):  
Jin Gu Kang ◽  
Gang Wang ◽  
Sung-Kon Kim
Keyword(s):  
Carbon Nanotubes ◽  
Joule Heating ◽  
High Performance ◽  
Electrochemical Impedance ◽  
High Current Density ◽  
Low Cost ◽  
Fast Response ◽  
Extrusion Process ◽  
Composite Fiber ◽  
Flexible Fiber

Microscale fiber-based supercapacitors have become increasingly important for the needs of flexible, wearable, and lightweight portable electronics. Fiber electrodes without pre-existing cores enable a wider selection of materials and geometries than is possible through core-containing electrodes. The carbonization of fibrous precursors using an electrically driven route, different from a conventional high-temperature process, is particularly promising for achieving this structure. Here, we present a facile and low-cost process for producing high-performance microfiber supercapacitor electrodes based on carbonaceous materials without cores. Fibrous carbon nanotubes-agarose composite hydrogels, formed by an extrusion process, are converted to a composite fiber consisting of carbon nanotubes (CNTs) surrounded by an amorphous carbon (aC) matrix via Joule heating. When assembled into symmetrical two-electrode cells, the composite fiber (aC-CNTs) supercapacitor electrodes deliver a volumetric capacitance of 5.1 F cm−3 even at a high current density of 118 mA cm−3. Based on electrochemical impedance spectroscopy analysis, it is revealed that high electrochemical properties are attributed to fast response kinetics with a characteristic time constant of 2.5 s. The aC-CNTs fiber electrodes exhibit a 94% capacitance retention at 14 mA cm−3 for at least 10,000 charge-discharge cycles even when deformed (90° bend), which is essentially the same as that (96%) when not deformed. The aC-CNTs fiber electrodes also demonstrate excellent storage performance under mechanical deformation—for example, 1000 bending-straightening cycles.

scholarly journals Review on Pressure Sensors: A Perspective from Mechanical to Micro-electro-mechanical systems

2021 ◽  
Author(s):  
Ankur Gupta
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Pressure Sensors ◽  
Micro Electro Mechanical System ◽  
Single Chip ◽  
Micro Electro Mechanical Systems ◽  
Compact Size ◽  
Wide Range ◽  
Fabrication Procedure ◽  
Application Requirements

Swiftly emerging research prospects in the Micro-Electro-Mechanical System (MEMS) enable to build of complex and sophisticated microstructures on a substrate containing moving masses, cantilevers, flexures, levers, linkages, dampers, gears, detectors, actuators, and many more on a single chip. One of the MEMS initial products that emerged into the micro-system technology is the MEMS pressure sensor. Because of their high performance, low cost, and compact size, these sensors are extensively being adopted in numerous applications viz., aerospace, automobile, and bio-medical domain, etc. These application requirements drive and impose tremendous conditions on sensor design to overcome the tedious design and fabrication procedure before its reality. MEMS-based pressure sensors enable a wide range of pressure measurements as per the application requirements. Considering its vast utility in industries, this paper presents a detailed review of MEMS-based pressure sensors and their wide area of applications, their design aspects, and challenges, to provide state of an art gist to the researchers of a similar domain in one place.

scholarly journals SLIC SUPERPIXELS FOR OBJECT DELINEATION FROM UAV DATA

2017 ◽  
Vol IV-2/W3 ◽  
pp. 9-16 ◽  
Author(s):  
S. Crommelinck ◽  
R. Bennett ◽  
M. Gerke ◽  
M. N. Koeva ◽  
M. Y. Yang ◽  
...  
Keyword(s):  
High Resolution ◽  
Low Cost ◽  
High Accuracy ◽  
Numerous Application ◽  
High Resolution Data ◽  
Cadastral Maps ◽  
Simple Linear Iterative Clustering ◽  
Object Delineation ◽  
Application Fields ◽  
Future Work

Unmanned aerial vehicles (UAV) are increasingly investigated with regard to their potential to create and update (cadastral) maps. UAVs provide a flexible and low-cost platform for high-resolution data, from which object outlines can be accurately delineated. This delineation could be automated with image analysis methods to improve existing mapping procedures that are cost, time and labor intensive and of little reproducibility. This study investigates a superpixel approach, namely simple linear iterative clustering (SLIC), in terms of its applicability to UAV data. The approach is investigated in terms of its applicability to high-resolution UAV orthoimages and in terms of its ability to delineate object outlines of roads and roofs. Results show that the approach is applicable to UAV orthoimages of 0.05 m GSD and extents of 100 million and 400 million pixels. Further, the approach delineates the objects with the high accuracy provided by the UAV orthoimages at completeness rates of up to 64 %. The approach is not suitable as a standalone approach for object delineation. However, it shows high potential for a combination with further methods that delineate objects at higher correctness rates in exchange of a lower localization quality. This study provides a basis for future work that will focus on the incorporation of multiple methods for an interactive, comprehensive and accurate object delineation from UAV data. This aims to support numerous application fields such as topographic and cadastral mapping.

scholarly journals Suppression of Noise to Obtain a High-Performance Low-Cost Optical Encoder

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Sergio Alvarez-Rodríguez ◽  
Noé Alcalá-Ochoa ◽  
Javier Cruz-Salgado ◽  
Francisco Gerardo Peña Lecona
Keyword(s):  
Working Conditions ◽  
High Performance ◽  
Low Cost ◽  
Angular Position ◽  
Response Speed ◽  
High Accuracy ◽  
Optical Encoder ◽  
System Noise ◽  
Research Platform ◽  
Suppress Noise

Currently, commercial encoders endowed with high precision are expensive sensors, and optical low-cost designs to measure the positioning angle have undesirable levels of system noise which reduce the good performance of devices. This research is devoted to the designing of mathematical filters to suppress noise in polarized transducers, in order to obtain high accuracy, precision, and resolution, along with an adaptive maximum response speed for low-cost optical encoders. This design was proved through a prototype inside a research platform, and experimental results show an accuracy of 3.9, a precision of 26, and a resolution of 17 [arc seconds], at least for the specified working conditions, for the sensing of the angular position of a rotary polarizer. From this work has been obtained a high-performance low-cost polyphase optical encoder, which uses filtering mathematical principles potentially generalizable to other inventions.

Parallel Architectures for MEDLINE Search

2008 ◽  
pp. 1048-1055
Author(s):  
Rajendra V. Boppana ◽  
Suresh Chalasani ◽  
Bob Badgett ◽  
Jacqueline A. Pugh
Keyword(s):  
High Performance Computing ◽  
High Performance ◽  
Response Times ◽  
Low Cost ◽  
Parallel Architecture ◽  
Fast Response ◽  
Parallel Architectures ◽  
Medline Search ◽  
Medline Database ◽  
Performance Computing

In this article, we describe a parallel architecture for MEDLINE database integrated with search refinement tools to facilitate accurate and fast response to search requests by users. The proposed architecture, to be developed by the authors, will use low-cost, high-performance computing clusters consisting of Linux based personal computers and workstations (i) to provide subsecond response times for individual searches and (ii) to support several concurrent queries from search refinement programs such as SUMSearch.

Development of Temperature Control System for Large-Scale Pre-Oxidation Furnace

2011 ◽  
Vol 339 ◽  
pp. 43-47 ◽  
Author(s):  
Kuan Yu ◽  
Bo Zhu
Keyword(s):  
Control Systems ◽  
Pid Controller ◽  
High Performance ◽  
Large Scale ◽  
Fast Response ◽  
High Accuracy ◽  
Temperature Control System ◽  
Carbon Fibres ◽  
Fuzzy Logics ◽  
Control Accuracy

For industrial producing of PAN based carbon fibres, the large-scale pre-oxidation furnace is the key equipment. In this paper, we proposed a new architecture of a set of control systems based on programmable computer controller (PCC) and a fuzzy self-adaptive PID controller to improve the precision of temperature controlling. This controller can not only retain the advantages of conventional PID controller but also can tune online PID parameters according to fuzzy logics. The experimental results show that the proposed controller has the advantages of fast response, small overshoot and high accuracy. The control accuracy is between -1 and 1 degree C which meets the requirements of high performance carbon fiber production.

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