Results 21 to 30 of about 5,524 (234)

Low-Cost Electronics for Automatic Classification and Permittivity Estimation of Glycerin Solutions Using a Dielectric Resonator Sensor and Machine Learning Techniques

Sensors, 2023
Glycerin is a versatile organic molecule widely used in the pharmaceutical, food, and cosmetic industries, but it also has a central role in biodiesel refining.
Miguel Monteagudo Honrubia, Javier Matanza Domingo, Francisco Javier Herraiz-Martínez, Romano Giannetti   +3 more
doaj   +1 more source

Highly Sensitive Quartz-Based Sensing System for the Detection of Subpercentage Changes in the Relative Permittivity of Liquids Flowing in Microchannels

Chemosensors, 2021
We describe a highly sensitive quartz sensor for measuring changes in the relative permittivity of liquids flowing in microchannels. The proposed method uses a highly stable oscillator and capacitance-dependent quartz crystal together with a capacitance ...
Vojko Matko, Miro Milanovič
doaj   +1 more source

Complementary Metamaterial Sensor for Nondestructive Evaluation of Dielectric Substrates

Sensors, 2019
In this paper, complementary metamaterial sensor is designed for nondestructive evaluation of dielectric substrates. The design concept is based on electromagnetic stored energy in the complementary circular spiral resonator (CCSR), which is concentrated
Tanveer ul Haq, Cunjun Ruan, Xingyun Zhang, Shahid Ullah   +3 more
doaj   +1 more source

CSRR-Based Microwave Sensor for Dielectric Materials Characterization Applied to Soil Water Content Determination

Sensors, 2020
A new and compact sensor based on the complementary split-ring resonator (CSRR) structure is proposed to characterize the relative permittivity of various dielectric materials, enabling the determination of soil water content (SWC).
João G. D. Oliveira, Erica N. M. G. Pinto, Valdemir P. Silva Neto, Adaildo G. D’Assunção   +3 more
doaj   +1 more source

High-Sensitivity Slot-Loaded Microstrip Patch Antenna for Sensing Microliter-Volume Liquid Chemicals with High Relative Permittivity and High Loss Tangent

Sensors, 2022
This paper proposes a microwave sensor based on a high-sensitivity slot-loaded rectangular microstrip patch antenna (MPA) for measuring microliter-volume liquid chemicals with high relative permittivity and high loss tangent.
Junho Yeo, Jong-Ig Lee
doaj   +1 more source

Dual Notch Microwave Sensors Based on Complementary Metamaterial Resonators

IEEE Access, 2019
In this paper, three dual notch microwave sensors are presented based on a microstrip transmission line and complementary metamaterial resonators. The main aim of this paper is to compare the constitutive parameters and sensitivity of all three dual ...
Tanveerul Haq, Cunjun Ruan, Shahid Ullah, Ayesha Kosar Fahad   +3 more
doaj   +1 more source

Quantifying Tree Hydration Using Electromagnetic Sensors

Horticulturae, 2020
An automated method of determining tree water status would enable tree fruit growers, foresters and arborists to reduce water consumption, reduce orchard maintenance costs and improve fruit quality.
Lance V. Stott, Brent Black, Bruce Bugbee   +2 more
doaj   +1 more source

Design of a High Sensitivity Microwave Sensor for Liquid Dielectric Constant Measurement

Sensors, 2020
In order to improve the sensitivity of liquid dielectric constant measurements, a liquid dielectric constant sensor based on a cubic container structure is proposed for the first time.
Honggang Hao, Dexu Wang, Zhu Wang, Bo Yin, Wei Ruan   +4 more
doaj   +1 more source

Flow-through microfluidic relative permittivity sensor using highly-doped silicon sidewall electrodes

Journal of Micromechanics and Microengineering
Abstract This paper reports a flow-through sensor for the real-time measurement of the relative permittivity of a flowing fluid. The proposed sensor contains multiple parallel microchannels. Each channel acts as a parallel plate capacitor in which the electrodes are isolated from the fluid.
M J S Bonnema, H-W Veltkamp, D Alveringh, R J Wiegerink, J C Lötters   +4 more
openaire   +1 more source

Enhanced Strength and Corrosion Resistance of Ti‐13Nb‐12Ta‐10Zr‐4Sn Alloy by Aging Treatment

Advanced Engineering Materials, EarlyView.
This work systematically investigates the effect of aging treatment on mechanical properties and corrosion behavior of vacuum arc‐melted Ti‐13Nb‐12Ta‐10Zr‐4Sn alloy. Owing to the increased α″ martensite, strength and corrosion resistance were significantly enhanced by aging treatment.
Yuhua Li, Rong Zhao, Qian Zhang, Haojie Wang, Yujing Liu, Lai‐Chang Zhang   +5 more
wiley   +1 more source