Geometric Design of Capacitive Sensor for Liquid Membrane Detection

2014 ◽  
Vol 687-691 ◽  
pp. 906-909
Author(s):  
Jing Xue ◽  
Nan Li ◽  
Xiang Dong Yang
Keyword(s):  
Liquid Membrane ◽  
Complex Structure ◽  
Signal Strength ◽  
Capacitive Sensor ◽  
Effective Area ◽  
Design Parameters ◽  
Measurement Sensitivity ◽  
Electrical Field ◽  
Sensor Performance ◽  
Structure Sensor

A multi-spiral capacitive sensor is proposed to improve the sensor performance, and the relation between the geometric parameters design of the sensor and the sensor performance is discussed. Compared to traditional sensors, under the same measurement conditions, the electrical field distribution of the multi-spiral-shaped sensor is presented. The detail effects of the sensor design parameters, such as gaps between the sensor electrodes, the effective area and the geometry of the sensor plates are qualitative analyzed. The experimental results prove that the complex structure sensor can improve the measurement linearity, signal strength and measurement sensitivity.

Influence of different design parameters on a coplanar capacitive sensor performance

2021 ◽  
pp. 102588
Author(s):  
Farima Abdollahi-Mamoudan ◽  
Sebastien Savard ◽  
Clemente Ibarra-Castanedo ◽  
Tobin Filleter ◽  
Xavier Maldague
Keyword(s):  
Capacitive Sensor ◽  
Design Parameters ◽  
Sensor Performance

Capacitive Sensor Design for an Automatic Car-Wiper System

2011 ◽  
Vol 211-212 ◽  
pp. 798-802 ◽  
Author(s):  
Nan Li ◽  
Cun Fu He
Keyword(s):  
Low Cost ◽  
Excitation Frequency ◽  
High Sensitivity ◽  
Signal Strength ◽  
Capacitive Sensor ◽  
Piezoelectric Sensors ◽  
Sensor Signal ◽  
Measurement Sensitivity ◽  
Capacitance Sensor ◽  
Different Shapes

A structure of capacitance sensor used for an automatic car-wiper system is presented. It aims to develop a low-cost sensor with high sensitivity and robustness. Firstly, two kinds of sensing technique based on optical and piezoelectric sensors for an automatic car-wiper system are introduced respectively. Then, three types of capacitance sensors of different shapes are designed. The parameters which affecting the sensor signal strength and measurement sensitivity are discussed. Thirdly, the electric field distributions of the sensors are simulated, and the fringe capacitance of the sensors are measured and analyzed. Finally, the optimum excitation frequency of designed sensor is determined, and the sensor noise is discussed in this paper. The experimental results indicate the validity and importance of the capacitance-based sensing technique which can be used for liquid detection on windshield of vehicles.

Research on Coplanar Capacitive Sensor Design for Film Thickness Measurement

2014 ◽  
Vol 945-949 ◽  
pp. 2030-2036
Author(s):  
Yu Gong ◽  
Hai Ye Zhu ◽  
Nan Li
Keyword(s):  
Film Thickness ◽  
Complex Structure ◽  
Capacitive Sensor ◽  
Fast Response ◽  
Thickness Measurement ◽  
Capacitive Sensors ◽  
Sensor Performance ◽  
Different Shapes ◽  
Film Thickness Measurement ◽  
Spiral Type

Coplanar capacitive sensors have been widely applied in many fields with its characterstics of non-invasion, lowcost and fast response. A complex structure of coplanar capacitive sensor is designed to be used for the film thickness measurement. Firstly, three types of coplanar capacitive sensors with different shapes are designed, and according to the experimental reuslts, the parameters affecting the sensor signal strength and sensitivities are discussed, the electric field distributions of sensors are simulated by COMSOL.Then the fringe capacitance of a series of spiral-type sensors are measured and analyzed. The experimental results indicate the rational geometrical parameter design about the coplanar capacitive sensor can improve the sensor performance obviously.

Drop-to-drop microextraction across a supported liquid membrane by an electrical field under stagnant conditions

2009 ◽  
Vol 1216 (9) ◽  
pp. 1496-1502 ◽  
Author(s):  
Nickolaj Jacob Petersen ◽  
Henrik Jensen ◽  
Steen Honoré Hansen ◽  
Knut Einar Rasmussen ◽  
Stig Pedersen-Bjergaard
Keyword(s):  
Liquid Membrane ◽  
Supported Liquid Membrane ◽  
Electrical Field

scholarly journals Особенности разрушения ударников из пористого сплава на основе вольфрама с упрочняющим наполнителем при взаимодействии с бронепреградами

2020 ◽  
Vol 90 (3) ◽  
pp. 434
Author(s):  
А.Н. Ищенко ◽  
С.А. Афанасьева ◽  
Н.Н. Белов ◽  
В.В. Буркин ◽  
С.В. Галсанов ◽  
...  
Keyword(s):  
High Speed ◽  
Complex Structure ◽  
Experimental Studies ◽  
Effective Area ◽  
Depth Of Penetration ◽  
Iron Cobalt ◽  
Nickel Iron ◽  
High Speed Collision ◽  
Localization Of Plastic Deformation ◽  
Crater Morphology

In this work, computational and experimental studies of the process of destruction of composite firing pin of porous alloy tungsten+nickel+iron+cobalt with 10 % content of titanium tungsten carbide at high-speed collision with steel barriers. It is shown that at ballistic tests with the broad range of speeds, significant exceeding of penetration of these firing pins in steel barriers in comparison with a mass-dimensional analog of the W-Ni-Fe-90 alloy. Based on the analysis of the crater morphology and structure of the striker fragments after penetration into the barrier, the assumption of implementation of the self-sharpenings mode of the firing pin, by means of localization of plastic deformation is made that leads to decrease in the effective area of interaction and increase in depth of penetration. Modification of a mathematical model of a porous ideal elasto-plastic solid with complex structure for the description of destruction with a possibility of accounting of the adiabatic shift mechanism in the course of interaction of the firing pin and a barrier is carried out.

scholarly journals Demulsification of Liquid Membrane Emulsion using High Voltage Glass Coated Electrode in Batch System

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
N. Othman ◽  
A. Ahmad ◽  
M. A. Piramali
Keyword(s):  
High Voltage ◽  
Liquid Membrane ◽  
Alternate Current ◽  
Cost Effective ◽  
Electrical Field ◽  
Electrical Field Strength ◽  
Oil Emulsion ◽  
Internal Phase ◽  
The Stability ◽  
Time Required

Demulsification is one of the key processes in emulsion liquid membrane application. This study involved the effect of electrical field on demulsification of water in oil using batch high voltage demulsifier system. This technique widely used because of its advantages of easy manipulation of applied field direction and strength, offers cost–effective separation and minimal environmental impact combined with mechanical simplicity. Influence of various values of frequency (400–1500 Hz) and voltage was studied experimentally using Alternate Current (AC) High Voltage Demulsifier with insulated electrode. The emulsion consists of kerosene as organic phase, sulfuric acid as internal phase and span 80 (3 and 5 w/v %) as a surfactant. The effect of emulsion preparation such as homogenizer speed, internal phase and surfactant concentrations on the stability of water–in–oil emulsion was also investigated. The results showed that the attractive forces between the water droplets under an electrical field increase by raising the applied electrical field strength. Meanwhile, the time required for the emulsion to separate and coalescence under electrical field increased when the stability of emulsion increased.

scholarly journals Modified Multi Input Multilevel DC-DC Boost Converter for Hybrid Energy Systems

2020 ◽  
Vol 9 (4) ◽  
pp. 1067-1072
Keyword(s):  
Output Voltage ◽  
Low Voltage ◽  
Complex Structure ◽  
Energy Systems ◽  
Input Voltage ◽  
Boost Converter ◽  
Design Parameters ◽  
Hybrid Energy ◽  
Hybrid Energy Systems ◽  
Constant Output

DC-DC converters are playing an important role in designing of Electric Vehicles, integration of solar cells and other DC applications. Contemporary high power applications use multilevel converters that have multi stage outputs for integrating low voltage sources. Conventional DC-DC converters use single source and have complex structure while using for Hybrid Energy Systems. This paper proposes a multi-input, multi-output DC-DC converter to produce constant output voltage at different input voltage conditions. This topology is best suitable for hybrid power systems where the output voltage is variable due to environmental conditions. It reduces the requirement of magnetic components in the circuit and also reduces the switching losses. The proposed topology has two parts namely multi-input boost converter and level-balancing circuit. Boost converter increases the input voltage and Level Balancing Circuit produce Multi output. Equal values of capacitors are used in Level Balancing Circuit to ensure the constant output voltage at all output stages. The operating modes of each part are given and the design parameters of each part are calculated. Performance of the proposed topology is verified using MATLAB/Simulink simulation which shows the correctness of the analytical approach. Hardware is also presented to evaluate the simulation results.

Organic solvents in electromembrane extraction: recent insights

2016 ◽  
Vol 35 (4) ◽  
pp. 169-183 ◽  
Author(s):  
Chuixiu Huang ◽  
Astrid Gjelstad ◽  
Stig Pedersen-Bjergaard
Keyword(s):  
Organic Solvents ◽  
Liquid Membrane ◽  
Polymeric Membrane ◽  
Personal Perspective ◽  
Preparation Technique ◽  
Aqueous Samples ◽  
Electrical Field ◽  
Sample Preparation Technique ◽  
Current Review ◽  
Electromembrane Extraction

AbstractElectromembrane extraction (EME) was invented in 2006 as a miniaturized sample preparation technique for the separation of ionized species from aqueous samples. This concept has been investigated in different areas of analytical chemistry by different research groups worldwide since the introduction. Under the influence of an electrical field, EME is based on electrokinetic migration of the analytes through a supported liquid membrane (SLM), which is an organic solvent immobilized in the pores of the polymeric membrane, and into the acceptor solution. Up to date, close to 150 research articles with focus on EME have been published. The current review summarizes the performance of EME with different organic solvents and discusses several criteria for efficient solvents in EME. In addition, the authors highlight their personal perspective about the most promising organic solvents for EME and have indicated that more fundamental work is required to investigate and discover new organic solvents for EME.

Analysis of Bio-Inspired Structures for 3D Force Sensing Using Virtual Prototyping

2019 ◽  
Author(s):  
Ahmed M. Alotaibi ◽  
Sohel Anwar
Keyword(s):  
Physical Therapy ◽  
Structural Integrity ◽  
Force Sensor ◽  
Design Parameters ◽  
Force Sensors ◽  
Element Analysis ◽  
Sensor Performance ◽  
Development Cycle ◽  
Tissue Manipulation ◽  
Sensor Configuration

Abstract 3D force sensors have been proven its effectiveness and appropriateness for robotics applications. It has been used in medical and physical therapy applications such as surgical robot and Instrument Assisted Soft Tissue Manipulation (IASTM) in the recent times. The 3D force sensors have been utilized in robot assisted surgeries and modern physical therapy devices to monitor the 3D forces for improved performances. The 3D force sensor performance and specifications depend on different design parameters, such as structural configuration, sensing elements placements, and load criterion. In this paper, different bioinspired structure configurations have been investigated and analyzed to obtain the optimal 3D force sensor configuration in terms of structural integrity, compactness, safety factor, and strain sensitivity. Finite Element Analysis (FEA) simulation was used for the analysis to minimize the time of the development cycle.

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