Magnetic Materials for New Sensors — Sensor Magnetics —

1991 ◽  
Vol 232 ◽  
Author(s):  
K. Mohri
Keyword(s):  
Magnetic Materials ◽  
High Performance ◽  
High Temperature Superconductors ◽  
High Sensitivity ◽  
High Level ◽  
New Sensors ◽  
And Control ◽  
Measurement And Control ◽  
New Magnetic Materials ◽  
Soft Ferrites

ABSTRACT”Magnetics sensors” are the key devices to establish intelligent electronics measurement and control systems for development of high level factory automations ( FA ). Various magnetics sensors having quick response, high sensitivity and robustness have been widely developed in these years using amorphous magnetic alloys, magnetoresistive ( MR ) elements, soft ferrites, and high temperature superconductors. These high-performance sensors are spreading in use in the fields of Power-Electronics ( Power Magnetics ), Mechatronics, Medical Electronics ( Medical Magnetics), Information Apparatus, Security Electronics ( Security Magnetics ) etc..Relations between new magnetic materials and high-performance sensors are summarized and a principle for constitution of these sensors is proposed.

Real-Time Validation and Control Environment for Parallel Robot Control Design

2011 ◽  
Author(s):  
A. Zubizarreta ◽  
E. Portillo ◽  
I. Cabanes ◽  
M. Marcos ◽  
Ch. Pinto
Keyword(s):  
High Speed ◽  
High Performance ◽  
Experimental Testing ◽  
Control Design ◽  
Parallel Robot ◽  
Parallel Robots ◽  
Full Potential ◽  
Control Environment ◽  
High Level ◽  
And Control

Due to their high performance when executing high-speed and accurate tasks, parallel robots have became the focus of many researchers and companies. However, exploiting the full potential of these robots requires a correct mechatronic design, in which the designed mechanism has to be controlled by a suitable control law in order to achieve the maximum performance. In this paper a novel Validation and Control Environment (VALIDBOT) is proposed as a support for the control design and experimental testing stages of these robots. The proposed open and flexible environment is designed to meet rapid prototyping requirements, offering a high level framework for both students and researchers. The capabilities of the environment are illustrated with an application case based on a 5R parallel robot prototype in which a modified CTC controller is tested.

scholarly journals Polyaniline Nanocomposites for Hydrogen Sulfide Detection at ppb Level

2021 ◽  
Vol 6 (1) ◽  
pp. 69
Author(s):  
Caroline Duc ◽  
Mohamed-Lamine Boukhenane ◽  
Thomas Fagniez ◽  
Nathalie Redon ◽  
Jean-Luc Wojkiewicz
Keyword(s):  
Hydrogen Sulfide ◽  
Tin Oxide ◽  
High Performance ◽  
Limit Of Detection ◽  
Anthropogenic Sources ◽  
Hazardous Substance ◽  
Repeatability And Reproducibility ◽  
New Sensors ◽  
And Control ◽  
Ppm Level

Coming from natural and anthropogenic sources, hydrogen sulfide gas (H2S) is a smelly hazardous substance at the sub-ppm level, which can lead to poisoning deaths at higher concentrations. New sensors with high metrological properties (detection limit lower than 1 ppm) and good stability are still needed to monitor and control the risk associated with this gas. The properties of a high-performance hydrogen sulfide gas sensor based on tin oxide and conductive polymers (polyaniline and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) are investigated. The principle of detection of this resistive sensor consists of a two steps reaction. H2S reacts with tin oxide producing hydrochloride acid, which dopes polyaniline, leading to the increase of its conductivity. Those systems present high repeatability and reproducibility, with sensitivities around 10%/ppm and a limit of detection close to 30 ppb. Moreover, the effect of interfering species such as humidity and oxidative gases (ammonia) is addressed. Those species have a limited impact, corrigible by data treatment. Finally, the sensors present an increase of sensitivity with time, apparently due to the modification of the interface between the electrodes and the sensitive materials.

Design of Measurement and Control System for a High-Performance TEM Based on Embedded PC

2011 ◽  
Vol 317-319 ◽  
pp. 1300-1303
Author(s):  
Zhong Ren Chen ◽  
Hui Wang ◽  
Fang Jing Chen
Keyword(s):  
Control System ◽  
High Performance ◽  
Detection Accuracy ◽  
Measurement And Control System ◽  
Transient Electromagnetic ◽  
Early Signal ◽  
Laboratory Test Results ◽  
Embedded Pc ◽  
And Control ◽  
Measurement And Control

For transient electromagnetic meter home-made, there are some disadvantages, for example early signal detection is difficulty, and speed and accuracy of signal acquisition is no high. Therefore a high-performance TEM based on embedded PC is designed to overcome these disadvantages. And its main part is measurement and control system, which design is mainly introduced. The system consists of a transmitter and receiver modules, which hardware block diagram and schematic design are introduced in detail. Laboratory tests for the system developed show that the electromagnetic transmitter module has advantages of short off-time and high transmitting current detection accuracy; the electromagnetic receiver has advantage of high sampling speed, big dynamic range and achieving accurate measurement of early signal. Laboratory test results are satisfactory.

Iron-Oxide Magnetic Materials for Millimeter-Wave Absorption

2021 ◽  
Vol 30 (10) ◽  
pp. 16-21
Author(s):  
Youn-Kyoung BAEK ◽  
Jung-Goo LEE
Keyword(s):  
Electromagnetic Wave ◽  
Iron Oxide ◽  
Magnetic Materials ◽  
Millimeter Wave ◽  
High Performance ◽  
Wave Spectra ◽  
High Frequencies ◽  
Practical Applications ◽  
Absorbing Materials ◽  
Soft Ferrites

High-performance electromagnetic-wave absorbers are required for the control of millimeter-wave spectra, which will play a big role in future 5G and 6G wireless networks. Traditional absorbing materials comprised of metals or soft ferrites have been developed but their lack of ability to absorb at extremely high frequencies continues to hinder their practical applications. Thus, this article briefly introduces several iron-oxide magnetic materials with millimeter-wave absorbing capability.

MEMS Inertial Technology for Aerospace Applications

2006 ◽  
Author(s):  
Eric J. Lautenschlager
Keyword(s):  
High Performance ◽  
Performance Metrics ◽  
Aerospace Industry ◽  
The United States ◽  
Future Goals ◽  
Aerospace Applications ◽  
Wide Range ◽  
Error Terms ◽  
High Level ◽  
And Control

The aerospace industry has guidance, navigation, and control needs which make use of a number of inertial technology systems. MEMS based solutions can offer several advantages over conventional technologies and are being developed for a wide range of applications. This paper will review the broad inertial applications that exist for the aerospace industry, identify some of the current non-MEMS technologies used to meet those needs, and then discuss what advantages MEMS based solutions can provide. This will be followed by a high level explanation of the general operating principles of a MEMS gyroscope, as well as identification of key performance metrics and error terms that are used for sensor evaluation. Finally, there will be a discussion of some basic design considerations, a review of the current state of the art for performance, and future goals and directions for inertial MEMS technologies. NOTICE: High performance inertial technology is subject to restrictions imposed by the International Traffic in Arms Regulations (ITARS), and Export Administration Regulations (EAR). The use of these technologies, or information pertaining to these technologies, may be restricted from foreign nationals of the United States.

scholarly journals RV-Across: An Associative Processing Simulator

2020 ◽  
Author(s):  
Jonathas Silveira ◽  
Isaías Felzmann ◽  
João Fabrício Filho ◽  
Lucas Wanner
Keyword(s):  
High Performance ◽  
Matrix Multiplication ◽  
Parallel Execution ◽  
Parallel Operation ◽  
Content Addressable Memory ◽  
Associative Processing ◽  
Big Data Applications ◽  
Processing Architectures ◽  
High Level ◽  
And Control

Associative Processing provides high-performance and energyefficient parallel computation using a Content-Addressable Memory (CAM). Emerging big data applications can be significantly sped-up by Associative Processing, but validation and evaluation are key challenges. We present RVAcross, a RISC-V Associative Processing Simulator for testing, validation, and modeling associative operations. RV-Across eases the design of associative and near-memory processing architectures by offering interfaces to both building new operations and providing high-level experimentation. Our simulator records memory and registers states of each associative operation pass, giving the user visibility and control over the simulation. The user can employ the simulation statistics provided by RV-Across to compute performance and energy metrics. RV-Across implements common associative operations and provides a framework to allow for easy extension. We show how the simulator works by experimenting with different scenarios for associative operations with three applications that test the functionality of logic and arithmetic computations: matrix multiply, checksum, and bitcount. Our results highlight the direct relation between the data length and potential performance improvement of associative processing in comparison to regular CPU serial and parallel operation. In case of matrix multiplication, the speed-up increases linearly with matrices dimension, achieving 8X for 200x200 bytes matrices and overcoming parallel execution in an 8-core CPU.

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