Results 11 to 20 of about 137,818 (293)

Wireless Capacitive Liquid-Level Detection Sensor Based on Zero-Power RFID-Sensing Architecture

Sensors, 2022
In this paper, a new method for the wireless detection of liquid level is proposed by integrating a capacitive IDC-sensing element with a passive three-port RFID-sensing architecture.
Shaheen Ahmad, Ramin Khosravi, Ashwin K. Iyer, Rashid Mirzavand   +3 more
doaj   +2 more sources

Reflective-Mode Phase-Variation Permittivity Sensor Based on a Step-Impedance Microstrip Line Terminated With a Slot Resonator for Solid and Liquid Characterization

IEEE Transactions on Microwave Theory and Techniques
This article proposes a highly sensitive single-frequency microwave sensor for dielectric characterization of solids and liquids. The sensor is a reflective-mode one-port device consisting of a step-impedance microstrip line terminated with a slot resonator (the sensing element) transversely etched on the ground plane.
Jonathan Muñoz-Enano, Paris Velez, Pau Casacuberta   +2 more
exaly   +3 more sources

A Versatile Reflective-Mode Phase-Variation Microwave Sensor Based on a Dumbbell Defect-Ground-Structure (DB-DGS) Resonator for Solid and Liquid Characterization

IEEE Sensors Journal
This article presents a single-frequency planar microwave sensor designed for characterizing solid and liquid samples. The sensor operates in reflective-mode one-port configuration utilizing a microstrip line with a series inductive strip terminated with a transversely oriented dumbbell defect-ground-structure (DB-DGS) resonator (etched in the ground ...
Nazmia Kurniawati, Paris Velez, Pau Casacuberta   +2 more
exaly   +3 more sources

Circuit Analysis of a Coplanar Waveguide (CPW) Terminated With a Step-Impedance Resonator (SIR) for Highly Sensitive One-Port Permittivity Sensing

IEEE Access, 2022
This paper presents a single-frequency reflective-mode phase-variation microwave sensor devoted to the dielectric characterization of materials. The device is implemented in coplanar waveguide (CPW) technology and consists of two parts: (i) the sensing ...
Pau Casacuberta, Paris Velez, Jonathan Munoz-Enano, Lijuan Su, Marta Gil Barba, Amir Ebrahimi, Ferran Martin   +6 more
doaj   +1 more source

Enzymatic Glucose Fiber Sensor for Glucose Concentration Measurement with a Heterodyne Interferometry

Sensors, 2023
In this study, we developed a glucose fiber sensor incorporating heterodyne interferometry to measure the phase difference produced by the chemical reaction between glucose and glucose oxidase (GOx).
Cheng-Chih Hsu, Wan-Yu Chung, Chun-Yi Chang, Chyan-Chyi Wu, Cheng-Ling Lee   +4 more
doaj   +1 more source

Salinity Independent Flow Measurement of Vertical Upward Gas-Liquid Flows in a Small Pipe Using Conductance Method

Sensors, 2020
Flow measurement in gas-liquid two-phase flow is always a challenging work, because of the non-uniform phase distribution, severe slippage effect between phases, and different flow structures.
Dayang Wang, Ningde Jin, Lusheng Zhai, Yingyu Ren   +3 more
doaj   +1 more source

Co-simulation of human digital twins and wearable inertial sensors to analyse gait event estimation

Frontiers in Bioengineering and Biotechnology, 2023
We propose a co-simulation framework comprising biomechanical human body models and wearable inertial sensor models to analyse gait events dynamically, depending on inertial sensor type, sensor positioning, and processing algorithms.
Lena Uhlenberg, Lena Uhlenberg, Adrian Derungs, Oliver Amft, Oliver Amft   +4 more
doaj   +1 more source

Low-Cost Polyethylene Terephthalate Fluidic Sensor for Ultrahigh Accuracy Measurement of Liquid Concentration Variation

Sensors, 2021
A low-cost polyethylene terephthalate fluidic sensor (PET-FS) is demonstrated for the concentration variation measurement on fluidic solutions. The PET-FS consisted of a triangular fluidic container attached with a birefringent PET thin layer. The PET-FS
Ruey-Ching Twu, Kai-Hsuan Li, Bo-Lin Lin
doaj   +1 more source

High Sensitivity and High Stability Dual Fabry-Perot Interferometric Fiber-Optic Acoustic Sensor Based on Sandwich-Structure Composite Diaphragm

IEEE Photonics Journal, 2021
A dual Fabry-Perot (FP) interferometric fiber-optic acoustic sensor based on sandwich-structure composite diaphragm is proposed, where fixed phase difference is generated by two FP interferometers (FPIs) with different cavity length.
Wanjin Zhang, Ping Lu, Zhiyuan Qu, Pingjie Fan, Chaotan Sima, Deming Liu, Jiangshan Zhang   +6 more
doaj   +1 more source

A New Capacitance Sensor for Measuring the Void Fraction of Two-Phase Flow Through Tube Bundles

Sensors, 2020
Evaluating the two-phase flow parameters across tube bundles is crucial to the analysis of vibration excitation mechanisms. These parameters include the temporal and local variation of void fraction and phase redistribution. Understanding these two-phase
Wael Ahmed, Adib Fatayerji, Ahmed Elsaftawy, Marwan Hassan, David Weaver, Jovica Riznic   +5 more
doaj   +1 more source