Results 31 to 40 of about 50,246 (312)

Polymer Waveguide Sensor Based on Evanescent Bragg Grating for Lab-on-a-Chip Applications

open access: yesSensors
In this work, an evanescent Bragg grating sensor inscribed in a few-mode planar polymer waveguide was integrated into microchannel structures and characterized by various chemical applications.
Zhenyu Zhang   +4 more
doaj   +1 more source

Optical Fiber Probe Microcantilever Sensor Based on Fabry–Perot Interferometer

open access: yesSensors, 2022
Optical fiber Fabry–Perot sensors have long been the focus of researchers in sensing applications because of their unique advantages, including highly effective, simple light path, low cost, compact size, and easy fabrication.
Yongzhang Chen   +7 more
doaj   +1 more source

Optical Sensors Based on Plastic Fibers [PDF]

open access: yesSensors, 2012
The recent advances of polymer technology allowed the introduction of plastic optical fiber in sensor design. The advantages of optical metrology with plastic optical fiber have attracted the attention of the scientific community, as they allow the development of low-cost or cost competitive systems compared with conventional technologies.
Lúcia Bilro   +3 more
openaire   +3 more sources

Assessment of a Dual-Wavelength Compensation Technique for Displacement Sensors Using Plastic Optical Fibers [PDF]

open access: yes, 2012
The paper analyzes the performance of a dual-wavelength technique devised to compensate power fluctuations in intensity-modulated plastic optical fiber sensors, which were specifically conceived for the measurement of displacements in industrial and ...
Massimo Olivero   +7 more
core   +1 more source

Classification of Human Motions Using Micro-Doppler Radar in the Environments with Micro-Motion Interference

open access: yesSensors, 2019
Human motion classification based on micro-Doppler effect has been widely used in various fields. However, the motion classification performance would be greatly degraded if the wireless environment has non-target micro-motion interference. In this case,
Xiaolin Ma   +4 more
doaj   +1 more source

A Wearable Sandwich Heterostructure Multimode Fiber Optic Microbend Sensor for Vital Signal Monitoring

open access: yesSensors
This work proposes a highly sensitive sandwich heterostructure multimode optical fiber microbend sensor for heart rate (HR), respiratory rate (RR), and ballistocardiography (BCG) monitoring, which is fabricated by combining a sandwich heterostructure ...
Fumin Zhou   +7 more
doaj   +1 more source

Multi-Sensor System For Level Measurements With Optical Fibres [PDF]

open access: yes, 2002
A system for measuring liquid level in multiple tanks using optical fibre technology has been developed. The oil field service industry can benefit from this intrinsically safe technology.
Sánchez-Pena, José Manuel   +3 more
core   +1 more source

Self‐Powered Stretchable Mechanoluminescent Optical Fiber Strain Sensor

open access: yesAdvanced Intelligent Systems, 2021
Strain sensors that can work sustainably and continuously without any external power supply are highly desirable for future wearable and implantable devices.
Haohua Liang   +10 more
doaj   +1 more source

Research on the estimation method of the point-of-interest (POI) displacement for ultra-precision flexible motion system based on functional optical fiber sensor

open access: yesMechanics & Industry, 2021
This paper proposes a POI displacement estimation method based on the functional optical fiber sensor and the phase modulation principle to improve the POI displacement estimation accuracy. First, the relation between the object deformation and the optic
Li Yujie, Zhang Ming, Zhu Yu
doaj   +1 more source

Deciphering transcriptional plasticity in pancreatic ductal adenocarcinoma reveals alterations in sensory neuron innervation

open access: yesMolecular Oncology, EarlyView.
Pancreatic sensory neurons innervating healthy and PDAC tissue were retrogradely labeled and profiled by single‐cell RNA sequencing. Tumor‐associated innervation showed a dominant neurofilament‐positive subtype, altered mitochondrial gene signatures, and reduced non‐peptidergic neurons.
Elena Genova   +14 more
wiley   +1 more source

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