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about Fiber Bragg Gratings (FBG), FBG Sensors and Monitoring Systems

Magnetic Sensors Based on Fiber Optic Products Detect Very Weak Magnetic Fields

on October 9, 2018

A light-based technique for measuring very weak magnetic fields was recently developed by the researchers at the University of Arizona. A portable, low-cost brain imaging system based on fiber optic products can operate at room temperature in unshielded environments. This fiber optic system would allow real-time brain activity mapping after potential concussions on the sports field and in conflict zones where the effect of explosives on the brain can be catastrophic.

Speaking specifically, scientists and engineers fabricated the magnetic sensors using optical fibers and a polymer-nanoparticle composite that is sensitive to magnetic fields. The researchers selected for their project nanoparticles based on magnetite and cobalt. These materials exhibit very high magnetic sensitivity. The aforementioned magnetic sensors can detect the brain’s magnetic field, which is 100 million times weaker than the magnetic field of Earth. Also, the researchers showed that new magnetic sensors can catch the weak magnetic pattern of a human heartbeat and has the capability to detect magnetic fluctuations that change every microsecond from an area as small as 100 square microns. Multiple seasons could then be used together to provide high spatial resolution brain mapping.

During work, the polarization rotation using an optical interferometer was detected. This works by splitting laser light into two paths, one of which passes through the highly-sensitive material while the other does not.

Indeed, further development of the researchers will be aimed at the long-term stability of magnetic sensors. Scientists plan to study how well sensors withstand environmental changes. Plus they want to fabricate several hundred sensors to make a special fiber optic system for evaluating and imaging the entire magnetic field of a human brain.

Magnetic Sensors Based on Fiber Optic Products Detect Very Weak Magnetic FieldsThe newly developed magnetic sensors could help scientists better understand the activity of the brain and diseases of the brain such as dementia and Alzheimer’s. They might also be used to predict volcanic eruptions and earthquakes, identify oil and minerals for excavation and detect military submarines. In addition to this, such magnetic sensors could offer an alternative to the magnetic reasonable imaging (MRI) systems currently used to map brain activity without the expensive cooling or electromagnetic shielding required by MRI machines.

Optromix is a fast-growing seller of such products from the fiber Bragg grating (FBG) line of products: fiber Bragg grating sensors, FBG interrogators, and multiplexers and, of course, Distributed Temperature, Acoustic, and Strain Sensing systems (DTS). Our major goal is to deliver the best quality of fiber optic sensors to our clients. Optromix creates and supplies a broad variety of excellent fiber-optic solutions for monitoring of various facilities all over the world.

If you are interested in Optromix fiber optic products, please contact us at info@optromix.com

 

 

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ЕлизаветаMagnetic Sensors Based on Fiber Optic Products Detect Very Weak Magnetic Fields

Fiber Optics in Avionics: Optical Fiber vs. Copper Cable

on October 3, 2018

Fiber optic technology is revolutionizing the avionics systems and is lightly to be the ideal solution to future aircraft requirements. Fiber optic products are revolutionizing the avionics systems and ideally to be the perfect solution to future requirements. A modern jet has enormous amounts of data flowing through it to support the latest technologies in the cockpit and the cabin. All that data has to be delivered at lightning speed. This necessity has led aircraft manufacturers and airlines to turn to the optical fiber. The copper cables co-existed with fiber optic applications for decades. Currently, designers and engineers find fiber optic products make better sense technically and economically in the overwhelming majority of cases.

The ability of the optical fiber to transmit much more information in less time over longer distances than traditional copper wire has become the reason that fiber optic equipment is being deployed on aircraft. There are fiber optic bundles of copper cables in an aircraft and the signals which they carry are fully replaceable by fiber optic products to allow an improvement of the system in various different ways.

There are two common trends regarding data transmission in the avionics market: constantly growing transmission speeds and the need to reduce weight. Fiber optic systems are an ideal response to these two trends in providing for high-speed data and immunity to electromagnetic interference that eliminates the need for any type of screening which can often be very expensive due to their weight and complexity. Fiber optic equipment offers lower wastage, weight, size, etc. These advantages make fiber optic equipment suitable for application in aircraft where space restrictions and electromagnetic interferences could be detrimental.

Nowadays fiber optic systems have been implemented in different aircraft systems such as sensory systems, distributed opening systems, and the fiber optic aircraft monitoring.Fiber Optics in Avionics: Optical Fiber vs. Copper Cable

In addition to this, fiber optic devices applied to the monitoring of aircraft structures provide some advantages over traditional devices. Fiber Bragg grating sensors have proved to constitute the most promising technology in this field. In order to prolong the operation period of all kinds of complex engineering systems and avoid catastrophic failures, so it is necessary to achieve the highest levels of damage detection. The automation of the inspection process is a point of major importance to reduce inspection efforts. The structural health monitoring system on the basis of fiber optic products can be defined as a set of devices that provides information that allows to locate, evaluate, and predict the loading and damage conditions of a structure. The structural health monitoring of aircraft structures can conduct real-time checks, reducing costs and improving the reliability and performance of the structures. A wide range of potential structural health monitoring technologies is being developed to meet these needs, and the most promising options are:

  • electrical strain gauges and crack wires;
  • acoustic emissions methods;
  • optical-based technologies;
  • comparative vacuum monitoring;
  • microelectromechanical systems (MEMS).

Fiber optic products and fiber optic devices, in general, are very appropriate to perform structural health monitoring due to the fact that they have their intrinsic capabilities, such as sensitivity to electromagnetic radiation, low weight, compact size, great sensitivity and resolution, and their suitability to be embedded into structures. Fiber optic devices for monitoring the strain in aircraft structures can be classified into the following categories: intensity-based, interferometric, distributed and grating-based fiber optic devices.

Among grating-based sensors, FBGs and probably the most mature and widely employed optical sensors for structural health monitoring of engineering structures due to their fast development achieved in recent years. Fiber Bragg grating sensors have important advantages over conventional strain sensors:

  • high sensitivity and resolution, low weight and small size, the absence of the electromagnetic interference;
  • suitability for being attached to a structure or embedded in composite materials
  • high multiplexing capability;
  • wavelength-encoded sensing in a way that is totally independent of the optical intensity;
  • different magnitudes can be measured using FBGs, such as strain, temperature, vibration or humidity.

Optromix, Inc. is a U.S. manufacturer of innovative fiber optic products for the global market, based in Cambridge, MA. Our team always strives to provide the most technologically advanced fiber optic solutions for our clients. Our main goal is to deliver the best quality fiber optic products to our clients. We produce a wide range of fiber optic devices, including our cutting-edge customized fiber optic Bragg grating product line and fiber Bragg grating sensor systems. Optromix, Inc. is a top choice among the manufacturers of fiber Bragg grating monitoring systems. If you have any questions, please contact us at info@optromix.com

 

 

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ЕлизаветаFiber Optics in Avionics: Optical Fiber vs. Copper Cable

Fiber Optic Equipment Goes Biocompatible and Implantable thanks to Hydrogel Fibers

on September 24, 2018

A biocompatible and highly stretchable optical fiber made from hydrogel may be implanted in the body to deliver therapeutic pulses of light or light up at the first sign of disease. This hydrogel fiber was developed by researchers from MIT (Massachusetts Institute of Technology) and Harvard Medical School. Hydrogels have already shown significant potential in everything from wound dressings to soft robots, but until now their fiber optic applications have been limited from their lack of toughness. Hydrogels are made of hydrophilic polymer chains that absorb up to 90 percent water. Such fiber optic products aren’t very strong or durable, but by adding glass tiny fibers the researchers created a tough, bendable, stretchable material.

In other words, a hydrogel is an extremely absorbent type of gel, a network of simple polymers that can contain up to 99,9% water, by weight. As the walls of this hydrogel, the material lining the interior of an optical fiber is clear but tuned to produce a phenomenon called total internal reflection. This means that light which moves at certain angles from the cable’s core material to its lining will be entirely reflected. By tuning hydrogel to create the same effect, scientists and engineers from MIT created a form of biocompatible optical cable. Getting light into the body is important: in the most basic sense, pulses of light are information, and having a hard-wired line of communication to implanted technology will be essential for development. However, it should be noted, such wireless technique is still too unreliable for most people to bet their lives on, and it’s also notoriously hard on power consumption.

Fiber Optic Equipment Goes Biocompatible and Implantable thanks to Hydrogel Fibers The researchers say that fiber optic products may serve as a long-lasting implant that would bend and twist with the body without breaking down. The researchers also have devised multiple recipes for making tough but pliable hydrogels out of various biopolymers. Plus the team has come up with ways to bend hydrogels with various surfaces such as metallic sensors and LEDs. Each optical fiber transmitted light without significant attention or fading. These fiber optic devices also found that fibers could be stretched over seven times their original length without breaking. Such modern fiber optic products can be used for long-term diagnostics, to optically monitor tumors or inflammation.

In other words, hydrogel fibers are interesting and provide a compelling direction for embedding light within the human body. Only considerable efforts in optimizing and managing the physical and mechanical properties of fibers will enable practical applications of medical relevance.

Optromix is a fast-growing vendor of fiber Bragg grating (FBG) products line: fiber Bragg grating sensors, FBG interrogators, and multiplexers, Distributed Temperature Sensing (DTS) systems. We create and supply a broad variety of top-notch fiber optic solutions for the monitoring of various facilities all over the world.

If you are interested in Optromix fiber optic products, please contact us at info@optromix.com

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ЕлизаветаFiber Optic Equipment Goes Biocompatible and Implantable thanks to Hydrogel Fibers

Fiber Optic Products Key to Optimised Fully Implantable Hearing Aids

on September 17, 2018

Modern research allows creating more and more biocompatible and highly stretchable fiber optic products. The optical fiber may one day be implanted in the body to deliver therapeutic pulses of light up at the first sign of disease. The world’s healthcare providers are increasingly looking to advanced biomedical instrumentation to enable more efficient patient diagnosis, monitoring, and treatment. Fiber optic equipment can be used in humans (clinical), in animals (veterinary), or other living organisms (life sciences), and, depending on the intended use, can be for diagnostic, therapeutic, or intensive care uses in clinical applications, research, and preclinical development, or laboratory testing.

Fiber Optic Products Key to Optimised Fully Implantable Hearing AidsThe joint Austrian-Serbian team is moving closer to developing a fully implantable hearing aid. The technology is based on completely contact-free fiber optic equipment that senses the tiniest ossicle movements and use them to stimulate the acoustic nerves. The weak spot of the fully surgically implantable hearing devices is the microphones, which receive sounds and use a sophisticated process to transform them into impulses for the acoustic nerves. It is important that such microphones can function error-free inside the human body for many years. Nowadays this is only possible to a limited extent, so now solutions are urgently needed.

New fully implantable hearing aids can overcome a wide range of the patient’s problems. Even state-of-the-art hearing aids often require parts outside the ear. This has many disadvantages for people who wearing hearing aids. For example, parts of the ear often become inflamed and the wearer’s own voice sounds distorted. Plus traditional hearing aids can be stigmatized if the device is visible.

The use of contact-free fiber optics measuring devices to detect sounds is the one highly important advance. Such fiber optic products would allow the microphone to be positioned inside the ear. This technology is based on low-coherence interferometry, a method which picks up superimposed sound waves. The ability to pick up sound from the ossicles is a huge advantage because it fully preserves the natural amplification function distortion and feedback.

The team of Austrian-Serbian scientists needed to address a number of fundamental requirements. For instance, they had to develop the operative procedure for the implantation, as well as the means of “targeting” the laser used for sensing. In the process of research scientists used artificial and animal models, which allowed them to optimize the quality of the ossicle vibration sensing system. The recently published findings confirm the effectiveness of the technology and that, in principle, could be used inside the ear for long periods. Aspects such as system miniaturization and electricity consumption will also be addressed by the team.

Optromix is a fast-growing seller of such products from the fiber Bragg grating (FBG) line of products: fiber Bragg grating sensors, FBG interrogators, and multiplexers and, of course, Distributed Temperature, Acoustic, and Strain Sensing systems (DTS). Our major goal is to deliver the best quality of fiber optic sensors to our clients. Optromix creates and supplies a broad variety of excellent fiber-optic solutions for monitoring of various facilities all over the world.

If you are interested in Optromix fiber optic products, please contact us at info@optromix.com

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ЕлизаветаFiber Optic Products Key to Optimised Fully Implantable Hearing Aids

New Types of In-Body Fiber Bragg Grating Sensors for Biomedical Research and Treatments

on September 10, 2018

New Types of In-Body Fiber Bragg Grating Sensors for Biomedical Research and TreatmentsThis year, for the first time ever, scientists have fabricated sensing elements known as fiber Bragg gratings (FBGs) inside fiber optic products designed to dissolve completely inside the body. Such bioresorbable fiber Bragg gratings could be used for in-body monitoring of bone fracture healing and for safer exploration of sensitive organs such as the brain. FBGs are optical elements which inscribed in optical fibers. Fiber Bragg gratings are commonly used for applications such as structural health monitoring of bridges or tracking the integrity of airplane wings. FBGs didn’t exhibit characteristics preferred for use in the body until now. According to the researchers, such new fibers should be safe for patient’s health even if they accidentally break, because these fibers have a design that allows them to break down similarly to dissolvable stitches. These fiber Bragg grating sensors don’t need to be removed after use and would enable new ways to perform efficient treatments and diagnoses in the body. New fibers have a diameter twice as that a human hair. They have the ability to dissolve into solutions with temperature and pH resembling those of the human body, within typical times that span between several hours and few days.

The new bioresorbable optical fiber Bragg gratings could be used to sense pressure at joints or act as tiny probes that can safely reach and assess the heart and other delicate organs. In addition to this, these fiber Bragg grating sensors could simultaneously deliver the laser beam and provide the accurate real-time temperature sensing necessary to monitor the laser ablation process. In other words, this new ability can be used for improving the laser-based techniques for removing tumors. On the basis of the new aforementioned applications of fiber Bragg gratings, a variety of types of interconnected structures in or on bioresorbable optical fibers can be created over the next years. It will allow a wide range of sensing and biochemical analysis techniques to be performed inside the body.

The researchers developed a special type of glass made of phosphorous oxide combined with oxides of calcium, magnesium, sodium, and silicon to create optical fiber Bragg grating sensors that could be safely used in the body. Such glass combines excellent optical properties with biocompatibility and water solubility. The properties of the optical fibers can be tuned by properly changing the glass composition.

A type of grating known as tilted optical fiber Bragg grating allows some of the reflected light to escape from the fiber core and enter into the surrounding cladding. Tilted gratings are often used for sensing because changes on the fiber cylindrical surface modify the back-reflected light in a way that can be monitored. Scientists and engineers created both tilted and standard optical fiber Bragg gratings to understand how the parameters used for inscription affected the grating sensing characteristics. Nowadays the researchers are performing systematic experiments to better understand how the fiber composition and ultraviolet laser irradiation conditions affect the speed at which the fiber Bragg grating dissolves. The dissolving and sensing properties of the fiber Bragg gratings will need to be studied in animals before being used in people.

Optromix, Inc. is a U.S. manufacturer of innovative fiber optic products for global market, based in Cambridge, MA. Our team always strives to provide the most technologically advanced fiber optic solutions for our clients. Our main goal is to deliver the best quality fiber optic products to our clients. We produce a wide range of fiber optic devices, including our cutting-edge customized fiber optic Bragg grating product line and fiber Bragg grating sensor systems. Optromix, Inc. is a top choice among the manufacturers of fiber optic devices.

If you have any questions, please contact us at info@optromix.com

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ЕлизаветаNew Types of In-Body Fiber Bragg Grating Sensors for Biomedical Research and Treatments

Advanced Fiber Optic Solutions Further Biomedicine

on September 3, 2018

Nowadays the production of optical fibers is robust and flexible enough to address an exciting now range of biomedical applications. Fiber optic applications in general and their in biomedicine have gained momentum in recent years. The optical fiber has been used primarily for endoscopy and laser power delivery, but now a wide base of academic and corporate-funded studies is exploring both in vivo and in vitro areas, with a number of new applications entering full-scale manufacturing. This growth has been fueled by a list of capabilities, including entering fuel-scale manufacturing. This growth has been fueled by a list of capabilities, including:

  • electromagnetic interference (EMI)-free transmission of energy and signals
  • small diameter
  • biocompatible coating
  • high mechanical flexibility
  • image transmission
  • the ability to sense pressure, temperature, chemicals, and strain.

The great capabilities suggest the introduction of fiber optic products in a wide range of applications. Such a broad range of applications requires a wide selection of fiber optic products with designs ranging from large-core, large-diameter multimode (MM) optical fibers for high-power laser light delivery to small-core, reduced-diameter single-mode (SM) optical fiber for in vivo sensing. Additional requirements demand advanced coatings because special coatings enable reduced thickness and greater tolerances: polyimide, for instance, in contradistinction to an acrylate, can withstand temperatures up to 300ºC as well as autoclave sterilization.

Device miniaturization is required for in vivo applications: fiber optic products and based on them fiber optic systems typically need to localize within a catheter tube where typical sizes for surgical procedures, such as coronary angioplasty, range from 5F to 8F (1473-2286 μn diameter). A standard optical fiber with a 245 μm coating diameter can fit within this catheters space, but it will need to accommodate other devices as well, including guide wires and manipulation tools. Beyond dimensions, an optical fibers stiffness must be considered as it can impact the flexibility of the overall catheter assembly, affecting the ability to guide the catheter correctly.

Advanced Fiber Optic Solutions Further BiomedicineIt is important to note that fiber optic products do not contain any electrically conductive or magnetic materials. Any fiber optic equipment can be considered free from electromagnetic interference (EMI). In other words, fiber optic products can be used in magnetic resonance imaging (MRI) devices and in close proximity to radio frequency (RF) electrosurgery tools used for cutting, coagulating, desiccating, and fulgurating tissue. Alternative techniques require an electrical sensor element, making them not only unsuitable for MRI and RF use but also require a separate signal line for each sensor element, which adds to the cross-sectional area. Fiber optic solutions, in contrast, imply thousands of uniquely identifiable sensor elements and still require only the single line of fiber, without additional sacrifice to the diameter. This characteristic enables transmission of multiple messages along one channel of communication. Such transmission often uses specially modified regions of the core called fiber Bragg gratings (FBGs).

In addition to this, one of the most impressive up-and-coming biomedical applications of fiber optic products is that of 3D shape sensing to facilitate procedures such as coronary angioplasty with minimal use of x-ray-assisted guidance. 3D shape sensing and distributed in vivo pressure sensing were not feasible, but optical fibers have made them possible.

Additionally, fiber optic devices have traditionally been developed and sold primarily for high-power laser applications. But their new generation and exactly a new generation of fiber optic probes allow both outputs of light in a particular format and collection of reflected light back into the optical fiber.

Optromix, Inc. is a U.S. manufacturer of innovative fiber optic products for global market, based in Cambridge, MA. Our team always strives to provide the most technologically advanced fiber optic solutions for our clients. Our main goal is to deliver the best quality fiber optic products to our clients. We produce a wide range of fiber optic devices, including our cutting-edge customized fiber optic Bragg grating product line and fiber Bragg grating sensor systems. Optromix, Inc. is a top choice among the manufacturers of fiber Bragg grating monitoring systems. If you have any questions, please contact us at info@optromix.com

 

 

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ЕлизаветаAdvanced Fiber Optic Solutions Further Biomedicine

Benefits and Risks of Real Time Thermal Rating Systems

on September 1, 2018

A real time thermal rating system has been developed initially for overhead transmission lines using actual meteorological data and real-time conductor temperatures and line loadings. Such real time thermal rating system provides much higher ampacity ratings than other conventional methods. A natural convective heat equation is developed for stranded conductors. The temperature of the conductor is solved directly without resorting to an iterative solution.

Benefits and Risks of Real Time Thermal Rating SystemsThe temperature of an asset itself, such as a power cable, is a key for real time thermal rating system. This can be measured continuously if equipment utilizes a distributed temperature sensing (DTS) system. Distributed temperature sensing optical fibers are installed along of the fiber cable. The fiber cable can also be utilized for telecoms purposes as DTS systems typically utilize standard telecoms fiber optics.

Thermal headroom typically is determined using static ratings which are based upon probabilistic methods and are representative of worst-case scenarios. The “static” design calculation methods provide simple and conservative estimates of network capacity. In reality, networks can be complex and operational rating can be influenced by multiple factors including weather conditions and loading. Soil condition, buried depth, burial configuration, cable size and type must be considered for underground equipment.

The real time thermal rating system works with such assets as:

 

  • Underground and subsea cables

 

Experience has shown that cable depth, soil type, and the shape of load curve have a material impact on ratings. The real time thermal rating system can determine actual thermal headroom indicating whether some unused network capacity can be released or locations where networks are constrained.

 

  • Overhead lines

 

  • Sag-based
  • Tension-based
  • Temperature-based
  • Current rating-based

 

  • Transformers

 

The real time thermal rating systems for transformers utilize measurements including transformer load, ambient and transformer temperatures based on the equations set out in IEC 6007. With the exception of emergency ratings, P15 recommends using an average ambient temperature and a weighted average that products the same aging if the temperature varies over a load cycle.

Optromix is a fast-growing vendor of fiber Bragg grating (FBG) products line: fiber Bragg grating sensors, FBG interrogators and multiplexers, distributed temperature sensing (DTS) systems. We create and supply a broad variety of top-notch fiber optic solutions for the monitoring of various facilities all over the world. Our main goal is to deliver the best quality fiber optic products to our clients. We produce a wide range of fiber optic devices, including our cutting-edge customized fiber optic Bragg grating product line and fiber Bragg grating sensor systems.

If you are interested in Optromix distributed temperature sensing systems, please contact us at info@optromix.com

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ЕлизаветаBenefits and Risks of Real Time Thermal Rating Systems

How to Make Surgery Less Invasive with the Fiber Optic Products Help?

on August 24, 2018

How to Make Surgery Less Invasive with the Fiber Optic Products Help?Optical fibers have the potential to be used in many biomedical applications. Such fibers have been used in medical devices since the 1960s, when fiber optic bundles were successfully pioneered for both illumination and imaging through endoscopes. Optical fiber imaging tools were widely accepted for invasive surgery since the 1980s. The minimally invasive surgery promises decreased pain and trauma during operations, faster recovery, and a reduced risk of infection. Nowadays special fiber optic products also are used as intelligent sensors to monitor physiology parameters such as temperature, pressure, oxygen concentration, and applied force.

Fiber optic sensors offer many advantages in comparison with conventional electronic sensors in medical sensing: small size, immunity to the electromagnetic interference (EMI), enhanced sensitivity, robustness, and geometrical versatility. Additionally, they are free from electrical parts or conductors in the sensor area. The unique properties of fiber optic products and based on the fiber optic equipment have enabled complicated procedures in cardiovascular examiners, angiology, gastroenterology, ophthalmology, oncology. neurology. dermatology, and dentistry. Novel specialty fiber types are also opening up entirely new sensing concepts. In addition to this, endoscopes represent the largest end-use market for medical fiber optics, supported by the growing popularity of minimally invasive surgeries. Minimization of medical instruments is a key trend encouraging the use of small and efficient optical fibers.

The integration of fiber optic applications in medical devices is a difficult task because it involves solving such problems as design and selection of fiber, packaging material, cost-effective manufacturing, quality control, and traceable record keeping.

In the last two decades, a variety of fiber optic products have been developed. However, it should be noted, point sensors based on Fabry-Perot interferometers and fiber Bragg gratings (FBGs) are probably the most deployed sensors in medical applications.

Fiber optic products and based on the fiber optic sensors are safe, valuable, highly stable, biocompatible tools for health-monitoring systems and they are amenable to sterilization and autoclaving. By modifying properties such as numerical aperture, care and cladding diameters, and coating material, the fibers can be adapted to different applications.

Why do fiber optic products find so many biomedical uses? Firstly, optical fibers, which used in medical sensors, have a thin polyimide coating to provide a small section and suitability for different kinds of sterilization processes. The temperature resistance of polyimide is difficult to match with other polymer materials. Secondly, the highly desirable parameter of the optical fiber for invasive surgery is tolerance to tight bonds. This allows for movement of the catheter, which winds through veins and arteries, and around organs and bones, on its way to an application area.

Summing up all of the above, the biomedical sensing market represents a lucrative and growing opportunity for fiber optic sensors, particularly for large volumes of disposable probes. The demand for move patient monitoring devices combines with a trend toward minimally invasive surgery, which itself requires a variety of small size that can be incorporated into catheters and endoscopes. There is also an opportunity for fiber optic sensors as EMI-compatible sensors to monitor vital signs during the use of MRI (and related techniques), as well as RF treatments.

Optromix is a fast-growing vendor of fiber Bragg grating (FBG) products line: fiber Bragg grating sensors, FBG interrogators, and multiplexers, Distributed Temperature Sensing (DTS) systems. We create and supply a broad variety of top-notch fiber optic solutions for the monitoring of various facilities all over the world.

If you are interested in Optromix FBG sensors or other fiber optic products, please contact us at info@optromix.com

 

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ЕлизаветаHow to Make Surgery Less Invasive with the Fiber Optic Products Help?

Distributed Sensing Technology for Different Types of Power Cable Monitoring

on August 14, 2018

Distributed Sensing Technology for Different Types of Power Cable Monitoring Distributed sensing technology includes distributed temperature sensing, distributed acoustic sensing, and to a lesser degree distributed strain monitoring. Distributed sensing technology has been prevalent in the power and utility sector since the 1980s and the largest area where this technology is commonly used is in the power cabling monitoring. Due to the evaluation of the technology most power cable condition monitoring applications have historically been associated with distributed temperature sensing, but nowadays engineers and scientists are increasingly using distributed acoustic sensing in different applications.

The applications for distributed temperature sensing in power cable monitoring includes:

  • Real-time thermal rating of cables (also known as dynamic cable rating). This has primarily been for buried cables, subsea cables, and cable tunnels, but there also has been applications for overhead cables;
  • Hotspot detection;
  • Fire detection for cables.

One of the key factors in the configuration of the distributed temperature sensing systems has been the position of the fiber optic sensing cable in relation to the power cable. At its best, DTS fiber optic sensing element would be located within the construction of the power cable itself. However, in many cases, the DTS fiber sensing element is attached to the surface of the power cable configuration (or in the vicinity), because of cable construction design or installation issues around splice joints.

There are various areas, types of cables and applications covered by distributed sensing technology including:

  1. Buried (underground) cable monitoring;
  2. Tunnel cable monitoring;

 

  1. Subsea power cable monitoring (subsea cables are difficult to access and expensive to repair);
  2. Overhead cable monitoring.

Power cable links can be critical assets in project commercial liabilities. Power links, for example, are used to energize offshore installation in the oil and gas pipeline monitoring market. Outages have tangible commercial implications, so that project risks are managed more effectively through better asset life management.

Optromix is a fast-growing seller of such products from the fiber Bragg grating (FBG) line of products: fiber Bragg grating sensors, FBG interrogators, and multiplexers and, of course, Distributed Temperature, Acoustic, and Strain Sensing systems (DTS). Our major goal is to deliver the best quality of fiber optic sensors to our clients. Optromix creates and supplies a broad variety of excellent fiber-optic solutions for monitoring of various facilities all over the world.

If you would like to purchase Distributed Temperature (DTS), Distributed Acoustic (DAS), or Distributed Strain systems, please contact us: info@optromix.com

 

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ЕлизаветаDistributed Sensing Technology for Different Types of Power Cable Monitoring

Distributed Acoustic Sensing (DAS) and Its Future Opportunities for Pipeline Monitoring

on August 9, 2018

Distributed Acoustic Sensing (DAS) and Its Future Opportunities for Pipeline MonitoringFiber optic products are progressively being deployed in many upstream and midstream applications. Nowadays fiber optic equipment is regularly used to provide high bandwidth telecommunications and infrastructure for SCADA (Supervisory Control and Data Acquisition) and is being used more and more to sense pressure, temperature, and strain along buried onshore and subsea pipelines and downhole. Pipeline leakage and intrusion detection continue to be a difficult issue because existing leak detection methods and the traditional methods of guarding pipelines have proven inadequate in the prevention of leaks and deferring third-party intrusion into pipelines and plant facilities.

Distributed Acoustic Sensing (DAS) systems based on fiber optic products are actively used for both sensing and telemetry. Each of the 4,000 independent, simultaneously sampled channels, of which the above systems consist, can be used to detect and locate activity within the vicinity of the pipeline. Also, that channels can be used to classify the type of activity through sophisticated acoustic signal processing.

Distributed Acoustic Sensing systems are very simple systems for providing total monitoring protection over large distances. DAS utilizes sensing cables, that are based on standard fiber optic cables, to obtain a measurement profile along the entire length of the sensing cable at intervals ranging from 3-10 m, depending on the physical size of the system. There is no specialized sensing point required.

There are three basic types of DAS systems utilized for fiber optic measurements:

  • Rayleigh-based systems
  • Raman-based systems
  • Brillouin-based systems

Depending on the frequency of the signal that is derived, this nomenclature is analyzed. DAS systems are ideally suited to monitoring pipelines for the third-party intrusion. Recent developments in the fiber optic products field have also highlighted the ability of the system to track pig runs, provide seismic data during earthquakes and detect gas leaks in buried pipelines.

Optromix is a fast-growing seller of such products from the fiber Bragg grating (FBG) line of products: fiber Bragg grating sensors, FBG interrogators and multiplexers and, of course, Distributed Acoustic Sensing systems (DAS). Our major goal is to deliver the best quality of fiber-optic sensors to our clients. Optromix creates and supplies a broad variety of excellent fiber-optic solutions for monitoring of various facilities all over the world. The use of Distributed Acoustic Sensing technology in downhole applications (all using the same optical fiber cable) gives a continuum of benefits that are distributed to the flow profiling and the condition monitoring. Distributed acoustic sensing systems can be retrofitted to existing installations of permanent in-well fiber optics based monitoring systems with the addition of surface equipment. New installations of DAS systems are also possible and have already been performed.Distributed Acoustic Sensing (DAS) and Its Future Opportunities for Pipeline Monitoring

If you are interested in DAS systems and want to learn more, please contact us at info@optromix.com

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ЕлизаветаDistributed Acoustic Sensing (DAS) and Its Future Opportunities for Pipeline Monitoring