scholarly journals Fiber Optic Sensors: A Review for Glucose Measurement

Biosensors ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 61
Author(s):  
José Luis Cano Cano Perez ◽  
Jaime Gutiérrez-Gutiérrez ◽  
Christian Perezcampos Perezcampos Mayoral ◽  
Eduardo L. Pérez-Campos ◽  
Maria del Socorro Pina del Socorro Pina Canseco ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Glucose Sensing ◽  
Fiber Optic Sensors ◽  
Glucose Measurement ◽  
Risk Of Infection ◽  
Glucose Levels ◽  
Advantages And Disadvantages ◽  
Non Invasive ◽  
Different Types ◽  
Patient Fiber

Diabetes mellitus is a chronic metabolic disorder, being globally one of the most deadly diseases. This disease requires continually monitoring of the body’s glucose levels. There are different types of sensors for measuring glucose, most of them invasive to the patient. Fiber optic sensors have been proven to have advantages compared to conventional sensors and they have great potential for various applications, especially in the biomedical area. Compared to other sensors, they are smaller, easy to handle, mostly non-invasive, thus leading to a lower risk of infection, high precision, well correlated and inexpensive. The objective of this review article is to compare different types of fiber optic sensors made with different experimental techniques applied to biomedicine, especially for glucose sensing. Observations are made on the way of elaboration, as well as the advantages and disadvantages that each one could have in real applications.

scholarly journals A Review of Non-Invasive Optical Systems for Continuous Blood Glucose Monitoring

Sensors ◽  
2021 ◽  
Vol 21 (20) ◽  
pp. 6820
Author(s):  
Bushra Alsunaidi ◽  
Murad Althobaiti ◽  
Mahbubunnabi Tamal ◽  
Waleed Albaker ◽  
Ibraheem Al-Naib
Keyword(s):  
Blood Glucose ◽  
Glucose Monitoring ◽  
Daily Basis ◽  
Glucose Sensing ◽  
Blood Glucose Monitoring ◽  
Optical Systems ◽  
Glucose Levels ◽  
Non Invasive ◽  
Blood Glucose Levels ◽  
Continuous Blood Glucose Monitoring

The prevalence of diabetes is increasing globally. More than 690 million cases of diabetes are expected worldwide by 2045. Continuous blood glucose monitoring is essential to control the disease and avoid long-term complications. Diabetics suffer on a daily basis with the traditional glucose monitors currently in use, which are invasive, painful, and cost-intensive. Therefore, the demand for non-invasive, painless, economical, and reliable approaches to monitor glucose levels is increasing. Since the last decades, many glucose sensing technologies have been developed. Researchers and scientists have been working on the enhancement of these technologies to achieve better results. This paper provides an updated review of some of the pioneering non-invasive optical techniques for monitoring blood glucose levels that have been proposed in the last six years, including a summary of state-of-the-art error analysis and validation techniques.

scholarly journals Design and Dimensional Measurement of Interdigital Sensor for Blood Glucose Measurement through Non-Invasive Method

2019 ◽  
Vol 8 (4) ◽  
pp. 6437-6441
Keyword(s):  
Glucose Monitoring ◽  
Blood Glucose Measurement ◽  
World Health ◽  
Glucose Measurement ◽  
Noninvasive Technique ◽  
Glucose Levels ◽  
Non Invasive ◽  
Reduced Physical Activity ◽  
Invasive Method ◽  
Health Organization

Diabetes has shown to be a chronic disease world over, mainly caused due to reduced physical activity and increased obesity. World health organization statistics show diabetes as a leading cause of disability universally. To avoid extreme medical conditions of subjects, regular monitoring of their glucose levels has been suggested. The most common method that has been in use is the pinprick method for glucose monitoring which carries the risk of contamination as well as irritation. One possible approach called noninvasive technique can be adopted to avoid this major concern. This paper presents designing Inter-Digital-Sensor (IDS) for non-invasive sensing of the glucose level. The sensor-based chip once mounted onto the upper arm or pinkie finger of diabetes subject, is able to sense different glucose levels concentration as impedance plots. A set of several simulation results has been obtained using COMSOL for getting optimized dimensions of the sensor digits. This research has presented the generation of an electric field and intensity by using electrode of known length with element spacing varying from 250µm to 600µm developed over 15mm x 20mm sensor area. An ID of 475µm width spacing with ten (10) digits producing 2.33 pF of capacitance value with impedance resonating at 13 GHz of frequency is reported in this paper

scholarly journals Recent Progress and Perspectives on Non-Invasive Glucose Sensors

Diabetology ◽  
2022 ◽  
Vol 3 (1) ◽  
pp. 56-71
Author(s):  
Nicholas B. Davison ◽  
Christopher J. Gaffney ◽  
Jemma G. Kerns ◽  
Qiandong D. Zhuang
Keyword(s):  
Optical Sensors ◽  
Technology Development ◽  
Optical Sensing ◽  
Glucose Monitoring ◽  
Glucose Sensing ◽  
Glucose Sensors ◽  
Monitoring Methods ◽  
Glucose Levels ◽  
Non Invasive ◽  
Wide Range

Self-monitoring of blood glucose forms an important part of the management of diabetes and the prevention of hyperglycaemia and hypoglycaemia. Current glucose monitoring methods either use needle-prick enzymatic glucose-meters or subcutaneous continuous glucose sensors (CGM) and thus, non-invasive glucose measurements could greatly improve the self-management of diabetes. A wide range of non-invasive sensing techniques have been reported, though achieving a level of precision comparable to invasive meters remains a challenge. Optical sensors, which utilise the interactions between glucose and light, offer the potential for non-invasive continuous sensing, allowing real-time monitoring of glucose levels, and a range of different optical sensing technologies have been proposed. These are primarily based upon optical absorption and scattering effects and include infrared spectroscopy, Raman spectroscopy and optical coherence tomography (OCT), with other optical techniques such as photoacoustic spectroscopy (PAS) and polarimetry also reported. This review aims to discuss the current progress behind the most reported optical glucose sensing methods, theory and current limitations of optical sensing methods and the future technology development required to achieve an accurate optical-based glucose monitoring device.

scholarly journals Versions of Fiber-Optic Sensors for Monitoring the Technical Condition of Aircraft Structures

2018 ◽  
Vol 4 (12) ◽  
pp. 2895 ◽  
Author(s):  
Nikolai Lvov ◽  
Stanislav Khabarov ◽  
Aleksander Todorov ◽  
Aleksander Barabanov
Keyword(s):  
Fiber Optic ◽  
Technical Condition ◽  
Fiber Optic Sensors ◽  
Strain Sensors ◽  
Fiber Optic Sensor ◽  
Temperature Deformation ◽  
Experimental Comparison ◽  
Polymeric Composite Material ◽  
Advantages And Disadvantages ◽  
Fiber Optic Strain Sensors

It is necessary to monitor the technical condition of various equipment due to the increased requirements for the safe operation of complex technical objects, such as bridges, structures, aircraft, cars and others. Monitoring systems based on the use of fiber-optic sensors measuring various physical quantities (temperature, deformation, pressure, vibration, etc.) are increasingly used for these purposes, since they have significant advantages over electrical sensors. The aim of the study is to compare the various options for the implementation of fiber-optic strain sensors to monitor the stress-strain state of the monitored object. A theoretical and experimental comparison of three types of fiber-optic sensors was carried out: on a mechanical fastener, sensors glued to the surface of a monitored design, and sensors embedded in a polymeric composite material at the stage of its manufacture. The requirements for the elements of the onboard systems of the aircraft according to the document “Environmental conditions and test procedures for airborne equipment QR-160D” are selected as comparison parameters. To assess the characteristics of various types of fiber-optic strain sensors, comparative bench mechanical and environmental tests were carried out. According to the test results, it was concluded that each type of sensor has its own advantages and disadvantages in comparison with each other, and in general, each of them can be used to create new standard systems for structural health monitoring of various units and structures of the aircraft (SHM systems). Also, the article proposed a new method of gluing a fiber-optic sensor to a controlled structure. This method - the use of specialized equipment, providing convenience and stability of gluing.

scholarly journals Review of Non-Invasive Glucose Sensing Techniques: Optical, Electrical and Breath Acetone

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1251 ◽  
Author(s):  
Maryamsadat Shokrekhodaei ◽  
Stella Quinones
Keyword(s):  
Glucose Monitoring ◽  
Glucose Sensing ◽  
Glucose Measurement ◽  
Tissue Properties ◽  
Non Invasive ◽  
Public Health Challenges ◽  
Clinical Accuracy ◽  
Measurement Devices ◽  
Breath Acetone ◽  
The Many

Annual deaths in the U.S. attributed to diabetes are expected to increase from 280,210 in 2015 to 385,840 in 2030. The increase in the number of people affected by diabetes has made it one of the major public health challenges around the world. Better management of diabetes has the potential to decrease yearly medical costs and deaths associated with the disease. Non-invasive methods are in high demand to take the place of the traditional finger prick method as they can facilitate continuous glucose monitoring. Research groups have been trying for decades to develop functional commercial non-invasive glucose measurement devices. The challenges associated with non-invasive glucose monitoring are the many factors that contribute to inaccurate readings. We identify and address the experimental and physiological challenges and provide recommendations to pave the way for a systematic pathway to a solution. We have reviewed and categorized non-invasive glucose measurement methods based on: (1) the intrinsic properties of glucose, (2) blood/tissue properties and (3) breath acetone analysis. This approach highlights potential critical commonalities among the challenges that act as barriers to future progress. The focus here is on the pertinent physiological aspects, remaining challenges, recent advancements and the sensors that have reached acceptable clinical accuracy.

scholarly journals Study of Intra-Chamber Processes in Solid Rocket Motors by Fiber Optic Sensors

Sensors ◽  
2021 ◽  
Vol 21 (23) ◽  
pp. 7836
Author(s):  
Andrey A. Zhirnov ◽  
Konstantin V. Stepanov ◽  
Stanislav G. Sazonkin ◽  
Tatyana V. Choban ◽  
Kirill I. Koshelev ◽  
...  
Keyword(s):  
Solid Fuel ◽  
Combustion Front ◽  
Fiber Optic ◽  
Control Method ◽  
Fiber Optic Sensors ◽  
Time Of Arrival ◽  
Main Mode ◽  
Longitudinal Modes ◽  
Non Invasive ◽  
Invasive Control

In this study, an experimental study of the burning rate of solid fuel in a model solid propellant rocket motor (SRM) E-5-0 was conducted using a non-invasive control method with fiber-optic sensors (FOSs). Three sensors based on the Mach–Zehnder interferometer (MZI), fixed on the SRM E-5-0, recorded the vibration signal during the entire cycle of solid fuel burning. The results showed that, when using MZI sensors, the non-invasive control of solid fuel burnout is made possible both by recording the time of arrival of the combustion front to the sensor and by analyzing the peaks on the spectrogram of the recorded FOS signal. The main mode of acoustic vibrations of the chamber of the model SRM is longitudinal, and it changes with time, depending on the chamber length. Longitudinal modes of the combustion chamber were detected by MZI only after the combustion front passed its fixing point, and the microphone was unable to register them at all. The results showed that the combustion rate was practically constant after the first second, which was confirmed by the graph of the pressure versus time at the nozzle exit.

Demodulation features of different types of signals for fiber-optic sensors

2010 ◽  
Author(s):  
Yabin Zhang ◽  
Xintong Sun ◽  
Jianian Cao ◽  
Chao Zhang
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Different Types

scholarly journals Overview of hardware for registering an impact on the surface of a space-craft

2021 ◽  
Vol 9 (3) ◽  
pp. 245-265
Author(s):  
Konstantin Voronov ◽  
Daniil Grigoriev ◽  
Alekcey Telegin
Keyword(s):  
Fiber Optic ◽  
Bragg Gratings ◽  
Fiber Optic Sensors ◽  
Experimental Results ◽  
Piezoelectric Sensors ◽  
Space Craft ◽  
Solar Panels ◽  
Advantages And Disadvantages

A review of devices that allow detecting micrometeoroid impacts on the spacecraft body is given, namely: piezoelectric sensors, fiber-optic sensors based on Bragg gratings, resistive sensors, sensors based on solar panels, robots, video surveil-lance cameras and thermography. The advantages and disadvantages of the devic-es presented in this article, their schemes and experimental results are presented

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