Electrooptical behaviour and control of a suspended particle device

2007 ◽  
Vol 15 (3) ◽  
Author(s):  
R. Vergaz ◽  
J. Pena ◽  
D. Barrios ◽  
I. Pérez ◽  
J. Torres
Keyword(s):  
Response Times ◽  
Suspended Particle ◽  
Electrical Model ◽  
Quick Method ◽  
Colour Changes ◽  
On Line ◽  
Series Configuration ◽  
Commercial Device ◽  
And Control

AbstractA suspended particle device is made by electrophoretic rod-shape particles suspended in an organic gel. These particles can twist and order with an applied voltage. The light crossing the material suffers more or less scattering according to that voltage. A commercial device is analyzed in this work. Several electrical models are tested, being the best one a series configuration including a shunt double layer capacitance and a Warburg element. Main parameter errors are below 2%, showing the quality of this new electrical model for this kind of devices. A quick method to improve the manufacturing process on-line is also proposed. Impedance measurements will be fitted to the selected electrical model, in order to check physical aspects such as charge diffusion lengths and response times. An electronic driver to obtain several levels of device transmission has been also developed, being its linearity demonstrated too. Colour changes are negligible for the main part of the bleaching process. All these features allow the use of this set in domotics application.

scholarly journals WSN and IoT Based Monitoring of Various Macronutrient Parameters and Disease Control of Banana Crop

2020 ◽  
Vol 9 (5) ◽  
pp. 1290-1296
Keyword(s):  
Internet Of Things ◽  
Early Detection ◽  
Precision Agriculture ◽  
Banana Fruit ◽  
Complete Control ◽  
On Line ◽  
Manual Tasks ◽  
And Control ◽  
Banana Crop

In India, banana is an important fruit. In this research, we designed and develop a precision agriculture system to monitor the various macronutrients and various crucial parameters to control and early detection of various diseases of banana crop using Wireless Sensor Networks (WSN) and Internet of Things (IoT). Developed precision agriculture system is used various sensors to sense and measure various micronutrients like Magnesium (Mg), Calcium (Ca), Sulfur (S), nitrite content in soil, ground water quality, crop growth, pest detection, crop on line monitoring, animal intrusion into the field and so on. It also measures the different parameters like change in weather, temperature, humidity, moisture changes in soil, quality and fertility of soil, various weeds, and level of water. Precision agriculture system implemented using advance sensors and improved technologies like WSN, IoT. Research experimental results show significant improvement in quality of banana fruit and overall production of banana crop. Before design and implementation we have carried out a detailed literature review on various approaches of precision monitoring system using Internet of Things (IoT). Proposed precision agriculture system can be used to automate and complete control of all farming processes. Our major focused is on monitoring macronutrients like Magnesium (Mg), Calcium (Ca) and Sulfur (S) parameters, to supply balance macronutrients using automatic action and early detection of diseases and control of Banana Crops System which will result to increase the productivity and quality of Banana products. This precision agriculture system keep farmers/users updated and empowers with minimum manual tasks.

Research of the On-Line Capacitor Measurement and Protection Device Based on STM32

2014 ◽  
Vol 945-949 ◽  
pp. 2641-2645
Author(s):  
Mao Fa Gong ◽  
Feng Qiu ◽  
Kai Li Song
Keyword(s):  
Reactive Power ◽  
Reactive Power Compensation ◽  
Control Device ◽  
Programming Algorithm ◽  
On Line ◽  
Line Loss ◽  
Compensation Device ◽  
And Control ◽  
Measurement And Control

It has great significance for the capacitor reactive power compensation device to improve the quality of the power system voltage and reduce the line loss. This paper proposes a reactive power compensation measurement and control device scheme that integrates reactive power compensation with microcomputer protection function, it also can cover the shortage of the microcomputer relay protection of parallel capacitor reactive power compensation system, the whole system is linked by the RS485 bus. The paper mainly introduces the hardware design around the STM32 series micro controller. And then introduce the design of the software on main programming algorithm of parameter measurement, communication protocol and capacitor protection configuration and the criterion of the major programming algorithm.

Monitoring and Control of Workpiece Vibrations Using Proportional Hydraulic Clamping Mechanism

2018 ◽  
Author(s):  
Manisha Yadav ◽  
Suhas Mohite
Keyword(s):  
Numerical Simulations ◽  
Monitoring And Control ◽  
Machining Errors ◽  
Dynamic Forces ◽  
Machined Parts ◽  
On Line ◽  
And Control ◽  
Clamping Pressure ◽  
Ansys Workbench

Machining thin-walled components involves continuous decrease in mass and stiffness of the parts being machined, causing increase in vibrations and instability. This leads to undesirable machining errors in dimensional and form tolerances as well as surface finish which adversely affects the quality of machined parts. To track and quantify the changing dynamic behaviour of Aluminum 6061-T6 workpiece, first, numerical simulations are carried out in ANSYS Workbench 18.2 to extract its modal properties. To validate this, off-line modal hammer tests are carried out on a number of semi-machined fixtured components, representing intermediate stages of machining. The results of the numerical simulations match well with the experimental measurements. With thinning of the walls from 6mm to 4.5mm the natural frequencies and damping ratios are found to drop by a factor of 1.5 and the magnification factor is found to rise by 25% signifying rise in the vibration levels. This obviously would reflect in enhanced vibrations of the workpiece when subjected to dynamic forces during machining. In this paper, this problem is addressed by deploying strain gauge bridge in the feedback and thereby regulating clamping pressure by proportional hydraulic clamping mechanism in an on-line mode. The method is found to compensate the vibration level by 40% and can be integrated in the design of a smart fixtures.

Standard signal processing using enriched sensor information for WWTP monitoring and control

2008 ◽  
Vol 57 (7) ◽  
pp. 1053-1060 ◽  
Author(s):  
I. Irizar ◽  
J. Alferes ◽  
L. Larrea ◽  
E. Ayesa
Keyword(s):  
Signal Processing ◽  
Wastewater Treatment Plants ◽  
Monitoring And Control ◽  
Standard Signal ◽  
Regression Parameters ◽  
Processing Module ◽  
On Line ◽  
Sensor Information ◽  
And Control

Important indicators for monitoring and control of wastewater treatment plants (WWTP) often have to be obtained from the processing of on-line signal trajectories. Therefore, the quality of sensor instantaneous measurements can be improved significantly if they are complemented with valuable information about the geometric features of their trajectories. The present paper describes the design and implementation of a Standard Signal Processing Architecture (SSPA) from which enriched sensor information is generated automatically. The SSPA has been made up of three complementary modules: the pre-processing module, the storage module and the post-processing module. Moreover, the SSPA has been parameterised so as to allow its adaptation to the specifications of every signal. By performing basic calculations on pre-processed signal trajectories, the storage module produces enriched vectors which collect information of the first and second time derivatives, average and variance values, peak values, linear regression parameters, curvature, etc. Then, the enriched information vectors can be exploited to implement customised monitoring and control tools. In this respect, the effectiveness of the SSPA has been demonstrated in three different practical cases: (1) OUR and KLa identification algorithms; (2) processing of measurements for real-time controllers; and, (3) detection of bend-points in on-line signals of SBR processes.

The Design of Bending Force Shape Control System Based on Fuzzy Adaptive Control

2014 ◽  
Vol 945-949 ◽  
pp. 2794-2798
Author(s):  
Jun Shuang Ma
Keyword(s):  
Control System ◽  
Pid Controller ◽  
Shape Control ◽  
Fuzzy Controller ◽  
Control Performance ◽  
Steel Shape ◽  
On Line ◽  
And Control ◽  
Fuzzy Adaptive

This paper presents a fuzzy adaptive shape control system, which overcomes the shortcoming of simple PID controller and simple fuzzy controller. The PID parameters can be adjusted on-line in this system. The simulation result shows that the control system can improve the control performance and control quality of steel shape control.

Resistance Monitor and Control for Vacuum Evaporation of Metals and Carbon

1976 ◽  
Vol 34 ◽  
pp. 572-573
Author(s):  
Russell L. Steere ◽  
Eric F. Erbe ◽  
J. Michael Moseley
Keyword(s):  
Electronic Device ◽  
Point Sources ◽  
High Contrast ◽  
Variable Resistor ◽  
Quality Of Results ◽  
Low Contrast ◽  
Evaporation Source ◽  
And Control ◽  
At Will

We have designed and built an electronic device which compares the resistance of a defined area of vacuum evaporated material with a variable resistor. When the two resistances are matched, the device automatically disconnects the primary side of the substrate transformer and stops further evaporation.This approach to controlled evaporation in conjunction with the modified guns and evaporation source permits reliably reproducible multiple Pt shadow films from a single Pt wrapped carbon point source. The reproducibility from consecutive C point sources is also reliable. Furthermore, the device we have developed permits us to select a predetermined resistance so that low contrast high-resolution shadows, heavy high contrast shadows, or any grade in between can be selected at will. The reproducibility and quality of results are demonstrated in Figures 1-4 which represent evaporations at various settings of the variable resistor.

Adaptive Signal Analysis and Interpretation for Real-time Intelligent Patient Monitoring

1994 ◽  
Vol 33 (01) ◽  
pp. 60-63 ◽  
Author(s):  
E. J. Manders ◽  
D. P. Lindstrom ◽  
B. M. Dawant
Keyword(s):  
Computer Architecture ◽  
Real Time ◽  
Data Abstraction ◽  
Monitoring Strategy ◽  
Intelligent Monitoring ◽  
Patient Status ◽  
On Line ◽  
Main Components ◽  
And Control ◽  
Adaptive Signal

Abstract:On-line intelligent monitoring, diagnosis, and control of dynamic systems such as patients in intensive care units necessitates the context-dependent acquisition, processing, analysis, and interpretation of large amounts of possibly noisy and incomplete data. The dynamic nature of the process also requires a continuous evaluation and adaptation of the monitoring strategy to respond to changes both in the monitored patient and in the monitoring equipment. Moreover, real-time constraints may imply data losses, the importance of which has to be minimized. This paper presents a computer architecture designed to accomplish these tasks. Its main components are a model and a data abstraction module. The model provides the system with a monitoring context related to the patient status. The data abstraction module relies on that information to adapt the monitoring strategy and provide the model with the necessary information. This paper focuses on the data abstraction module and its interaction with the model.

Boilerplate

2012 ◽  
Author(s):  
Margaret Jane Radin
Keyword(s):  
Economic Efficiency ◽  
Analytical Framework ◽  
Daily Basis ◽  
Regulatory Agencies ◽  
Jury Trial ◽  
Comprehensive Treatment ◽  
New Methods ◽  
And Control ◽  
Fine Print

Boilerplate—the fine-print terms and conditions that we become subject to when we click “I agree” online, rent an apartment, or enter an employment contract, for example—pervades all aspects of our modern lives. On a daily basis, most of us accept boilerplate provisions without realizing that should a dispute arise about a purchased good or service, the nonnegotiable boilerplate terms can deprive us of our right to jury trial and relieve providers of responsibility for harm. Boilerplate is the first comprehensive treatment of the problems posed by the increasing use of these terms, demonstrating how their use has degraded traditional notions of consent, agreement, and contract, and sacrificed core rights whose loss threatens the democratic order. This book examines attempts to justify the use of boilerplate provisions by claiming either that recipients freely consent to them or that economic efficiency demands them, and it finds these justifications wanting. It argues that our courts, legislatures, and regulatory agencies have fallen short in their evaluation and oversight of the use of boilerplate clauses. To improve legal evaluation of boilerplate, the book offers a new analytical framework, one that takes into account the nature of the rights affected, the quality of the recipient's consent, and the extent of the use of these terms. It goes on to offer possibilities for new methods of boilerplate evaluation and control, and concludes by discussing positive steps that NGOs, legislators, regulators, courts, and scholars could take to bring about better practices.

Management and engineering solutions to improve processing stock quality and reduce resource-intensity of mining

2018 ◽  
pp. 56-68
Author(s):  
V. V. Agafonov ◽  
V. Yu. Zalyadinov ◽  
M. E. Yusupov ◽  
N. S. Bikteeva
Keyword(s):  
Development Strategy ◽  
Open Pit ◽  
Mining Operations ◽  
High Concern ◽  
General Production ◽  
Resource Intensity ◽  
Product Output ◽  
And Control ◽  
A Company

Sustainability of mining companies is of of high concern. The problem is specifically acute at companies that are monotownor monosettlement-forming. Sustainability of a mine depends in many ways on product quality and production resource-intensity. This article discusses formation of mineral quality indexes in terms of an open pit chrysotile mine. The studies took into account specific features of operation procedures implemented by each structural division of the mine. The analysis has found managerial and technological inconsistencies which affect quality and marketable product output, as well as efficiency of the mine in whole. The background for efficiency enhancement at a company is, by the authors’ opinion, consolidation of personnel subject to the single development strategy, namely: improvement of production and control efficiency, as well as use of available reserves and resources by means of better setup for production. The proposed approaches to planning mining operations and forming mineral quality allow higher quality of processing stock. In addition, a new model proposed for interaction between structural divisions of a mining company ensures improvement of general production indexes.

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