Articles

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

Promising Frontiers for Distributed Acoustic Sensing

on May 15, 2018

Distributed Acoustic Sensing (DAS), the rapidly evolving optical fiber sensor technology for permanent geophysical monitoring uses fiber optic products to allow acoustic frequency strain signals to be detected over large distances and in a harsh environment. The principle of Distributed acoustic sensing is based on changes in the intensity of light reflections caused by sound waves radiating against a single-mode fiber optic cable. These changes can be detected and used to obtain a valuable information. The last decade is marked by growth in the distributed acoustic sensing market. The growth is stimulated by drivers such as the ability of the systems to operate in harsh working environments. Furthermore, Das systems based on the fiber optic equipment are not susceptible to electromagnetic interference and resistant to corrosion in humid conditions. Another driver for the DAS market is the ability of DAS technology to provide key data which helps to optimize oil and gas operations. DAS system is so sensitive that it can detect even a low-flying drone passing overhead, vandals damaging a railway line or someone probing the ground trying to find a pipeline from which to steal oil.

Walk-away data, which can be obtained with the help of the distributed acoustic sensing system, yield images that are nearly equivalent to images from traditional borehole geophones in terms of signal to noise ratio and resolution. Distributed acoustic sensing system can be used to monitor all sorts of sensitive locations, from oil and gas pipelines to railway tracks, military bases, and international borders because such system allows underground fiber optic devices to be converted into a giant string of microphones. Nowadays DAS capabilities are in use in the oil, gas, and border protection businesses. Permanently installed fiber optic infrastructure based on fiber optic devices will enable low-cost non-intrusive geophysical monitoring. Also, it should be noted, any single-mode fiber can quickly be turned into a series of listening fiber optic devices using distributed acoustic sensing with minimal fiber work at either and of the monitored fiber section. In addition to this, distributed acoustic sensing system is capable of creating a hydraulic fracturing or “fracking” that is very effective at releasing natural gas and oil trapped in rocks. This system works by sending sharply defined pulses of laser light down the cable: high-speed signal-processing techniques are used to analyze instantly what the sound is likely to be. Various seismic sensors can be used to monitor the fracking process, from test bores drilled nearby, but it is a costly and tricky process. Also, the Distributed acoustic sensing system can be used to monitor sounds coming from below ground, in particular, those produced by the water, sand, and chemicals pumped under high pressure to fracture rock during fracking.

Promising Frontiers for Distributed Acoustic SensingThe DAS technique relies on a phenomenon known as Rayleigh scattering, named after 19th-century British Lord Rayleigh, who discovered it. The first DAS operation was performed by Shell in 2009. Since then, this technique has been improved and widely tested in various field situations including the VSP (Vertical Seismic Profiling), microseismic measurements, well and reservoir surveillance, hydraulic fracturing monitoring and diagnostics. In addition, Shell and other oil companies are using the DAS system to monitor their fracking. It uses fiber optic devices inserted into a wellbore to build up an acoustic picture of the fracking fluid going into the rock at multiple levels. The fracking process can be constantly adjusted so that it runs in the most efficient way by having a clearer idea of how much fluid is going where. The DAS system is the ideal solution for the detection of this fluid and its pathways.

The DAS market is expected to be worth USD 440,2 Million by 2020. The major vertical in this market is oil and gas industry, followed by infrastructure and fire detection. In oilfield services, DAS is used in evaluation, completion, and production activities, and helps in cost optimization. The geographic analysis means America’s DTS manufacturers as leaders on the market. Asia Pacific (APAC) region is expected to grow the fastest during the forecast period.

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.

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

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ЕлизаветаPromising Frontiers for Distributed Acoustic Sensing

Fiber Optic Products for Aircraft Structural Health Monitoring

on May 8, 2018

Aircraft structures require regular, scheduled inspections and monitoring of all possible hazards due to their special conditions and the principles of their design. Therefore, structural health monitoring is conducted through fiber optic devices and has a great potential to reduce the costs related to these operations. 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:Fiber Optic Products for Aircraft Structural Health Monitoring

  • 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 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 monitoring of various facilities all over the world.

If you are interested in Optromix FBG sensors, please contact us at info@optromix.com

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ЕлизаветаFiber Optic Products for Aircraft Structural Health Monitoring

The Growth and Development Prospects of Worldwide Fiber Optic Sensor Market

on April 26, 2018

Optical fiber sensors have seen increased acceptance and widespread use in the scientific world in the last few decades. Against the background of other sensor types, fiber Bragg grating sensors have become widely known and popular. Such FBG sensors are able to measure the various parameters of the substances studied in the research of scientists and engineers. These are such parameters as chemical and biological agent, temperature, strain, pressure and many others. In addition to this, the optical fiber sensor technology and fiber Bragg grating sensors, in general, have the increased flexibility of design to be used as a single point or multipoint arrays. Also, fiber optic systems and devices based on them have their own relative low cost that makes them available for use in the different fields and industries. However, it is necessary to actively engage with the problems of increasing the FBG sensors attractiveness for business.The Growth and Development Prospects of Worldwide Fiber Optic Sensor Market

Nowadays fiber optic sensors markets are in a relatively early development stage so it is difficult to access and forecast with accuracy. Furthermore, the market segments are fragmented due to the variety of sensing applications and industries where they are applied. The global market of the fiber Bragg grating products is primarily composed of three key segments:

  1. sensing devices (bare FBGs for sensing applications, packed FBG sensors, and FBG arrays)
  2. instrumentation (fiber Bragg grating interrogating instruments and related components: multiplexers, switches, data acquisition systems, software and graphical user interfaces)
  3. system integration and installation (implementation tools for the fiber optic solutions and fiber optic system installations like a design, planning, system integration, customer training, service, etc.)

According to the latest data, the worldwide demand for bare and packaged FBGs is more than 10, 000 pieces per year. And besides that, the worldwide demand for FBG arrays is estimated to be between 100s to 1, 000 arrays per year. The combined present global market size of this segment is between $15M to $35M USD a year with an annual growth rate of 15% to 25%. The total market size of all products in the FBGs product line is estimated to be in excess of $50M USD.The Growth and Development Prospects of Worldwide Fiber Optic Sensor Market

Future applications of FBG sensors will possibly develop over time depending on cost reduction and development of specialized and application-specific packaging. It is expected that more conventional and popular applications such as discrete strain and temperature sensing will continue to evolve and acquire greater market shares. Newer applications in chemical, biological and medical sensing will lead to the creation of a new generation of fiber optic product that will perform specific agent or parameter sensing functions.

In order for fiber optic products to penetrate into mainstream industrial processes,  appropriate transducers must be developed. FBGs must meet such criteria as ecological strength, appropriate sensitivity, and the correct dynamic range. Also, they need to be early replaceable without description the FBGs network and adhere to engineering standards, either existing now. One of the most important conditions for the development of the global market of the fiber optic products is a seamless integration with existing control system architectures.

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. 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 monitoring of various facilities all over the world. If you would like to purchase FBG sensors, please contact us at info@optromix.com

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ЕлизаветаThe Growth and Development Prospects of Worldwide Fiber Optic Sensor Market

Ubiquitous optical fiber strain sensors against a background of large-scale urbanization

on April 19, 2018

Fiber Bragg gratings are often used in strain sensing especially in such places where environment is harsh (for instance, high-EMI, high-temperature or highly corrosive). Strain measurement is imperative during prototype design and testing. Strain measurements ensure that materials perform as they should and that the equipment is safe and durable. Measuring strain is crucial for testing complex structures, like aircrafts, turbines, etc. There various ways in which stress can be measured, but  it is widely accepted that FBG sensors are the most efficient way of strain measurement.

There are two types of applications of the fiber Bragg grating strain sensors:

  • Long-term Static Strain Sensing. The main issue in the long-term static strain test is an interest in measuring the long-term static strain of the component in question. In order to carry out the above operation, it is necessary to set up the grating on the structure, find out what the initial wavelength is, and then within a set period of time to detect and record the changes that have occurred. Also, it is possible to return to the structure, reattach and refer back to the initial wavelength. As a result, it becomes possible to obtain the determination of what this strain is from the initial condition at that time. The ability to disconnect your monitoring instrumentation and return for results after a large amount of time such as months or even years is a very great advantage of fiber Bragg grating sensors. For instance, in the case of bridges, it is common for engineers to visit the bridge and conduct the impact testing using am impact hammer on the different parts of the bridge. This is time-consuming and even hazardous because of the height of some bridge structures. The distribution of a number of FBG sensors throughout the bridge and the attachment the instrumentation to this bridge on a periodic basis are much more efficient solution. This is only one of the good examples to demonstrate the effectiveness of the fiber Bragg grating strain sensors. Besides bridges, other examples of using FBG for long-term static strain testing are buildings, piers, and structures in high earthquake prone areas.Ubiquitous optical fiber strain sensors against a background of large-scale urbanization
  • Dynamic Strain Sensing. The different structures may have the very low-frequency modes, and they may also have higher modes due to the effects of wind and tide. Most earthquakes and other earth tremors are low frequency events.  Fiber Bragg gratings can be attached to the structures and monitored for the vibrations during the earth tremors and earthquakes. The low frequency dynamic strain testing can help in determining the reaction of high-rise buildings to wind. In addition to this, FBG sensors create connections with piers and other shore structures to determine their vibrations during the ebb and flow of tides. Dynamic strain testing can also be performed on transportation vehicles like automobiles, trains and airplanes. In addition to civil structures and vehicles, there are a number of other applications for dynamic strain testing and vibration stress testing using fiber Bragg gratings. FBG sensors can be attached to industrial machinery to determine the frequency and amplitude of the stress vibrations.  

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.

If you would like to purchase Optromix FBG Strain Sensors, please contact us: info@optromix.com or +1 617 558 98 58

 

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ЕлизаветаUbiquitous optical fiber strain sensors against a background of large-scale urbanization

Distributed Temperature Sensing systems: Benefits and Applications

on April 11, 2018

One of the most promising directions in the development of systems for controlling of temperature of high-voltage power lines, fire alarm systems, oil and gas fields and others are DTS systems. Distributed Temperature Sensing systems is a rising technology which will be further actively developed in the near future. According to the forecasts, the price of such fiber-optic DTS systems will continue to decline while productivity of them will continue to increase. Distributed Temperature Sensing technology becomes more applicable and more popular for many applications in a wide range of industries.

DTS systems were actively involved in various areas of scientific and engineering developments since the 1980s as temperature systems which can measure temperature with a high degree of accuracy over significant distances. In addition to this, such optoelectronic systems were able to provide a continuous profile of the temperature distribution along the fiber-optic cable or other device. The main measuring principles were based on detecting the back-scattering of light using the Rayleigh, Raman and Brillouin principles.

Distributed Temperature Sensing systems: Benefits and Applications

Distributed Temperature Sensing systems: Benefits and Applications

The key to understanding of fiber-optic Distributed Temperature Sensing systems is awareness of the fact that the optical fiber itself is the sensor and the instrumentation provides measurements on every 1m along the length of the fiber. What does this mean? This means that the operator is able to receive temperature information at all points from the moment of cable installation. Real advantages of DTS systems become apparent when a temperature profile of the installation is required or when a large number of sensing points is crucial. DTS systems are much more convenient than any conventional temperature sensing technology.

Distributed Temperature Sensing technology becomes practical for many applications. For instance, one of the most promising technologies based on DTS principle is linear optical fire detection. Such fire detection allows to detect fire and localize the seat of the fire within a building with 1m resolution. Also DTS systems are applied, for instance, in the oil and gas industry. Systems in question are used to monitor the temperature log of the well. In addition to this, fiber-optic DTS systems provide an opportunity to upscale the measurements to large spatial extents and monitor the temporal dynamics of the hydrological processes. Recent enhancements of this technology based on distributed sensing system have allowed the balance of energy and fluid mass at watershed scale. However, it is difficult to say that about all cases of DTS application. These systems are involved in the power systems, in cables for better ampacity judgment and in safety applications like the mines are reviewed. So it is not surprising that the number of companies providing DTS systems is growing ever so much.

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 Sensing systems (DTS). Our major goal is to deliver the best quality of fiber-optic sensors to our clients. Optromix create and supply a broad variety of excellent fiber-optic solutions for monitoring of various facilities all over the world.

If you would like to purchase DTS (Distributed Temperature System), please contact us: info@optromix.com

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ЕлизаветаDistributed Temperature Sensing systems: Benefits and Applications

Fiber-optic sensors in biomedical applications

on April 4, 2018

The scientific experience of the last few decades was marked by major achievements in the field of fiber-optic sensors. Optical fiber sensors have certain advantages like immunity to electromagnetic interference and high sensitivity, small size and small weight, large bandwidth and ease of use and distribution. Over the years, fiber-optic sensors have fastly grown in quality and functionality and have found widespread use in many areas such as defence, automotive, manufacturing and among various other industries. A wide range of applications was defined for fiber sensors in general and in particular for medical and biomedical applications. Also these technologies have become more commercially available.

The medical and biomedical industry provides many challenging requirements, for which optical fiber sensors can provide original and reliable solutions. In the coming years, scientists and engineers in the medical and biomedical areas will use fiber-optic sensor turnkey systems for sensing and measuring of any type of physical quantity. Such fiber-optic turnkey systems are a combination of four basic components: a light source, an optical fiber, a sensor element and a light detector. In such systems the fiber-optical sensor acts as a light modulator to change a property of light (phase, polarization etc.).

Possible future applications of fiber-optic sensors in biomedical research include simultaneous collection and analysis of samples for drug safety evaluation for instance. Also optical fiber sensors help in identification of drug molecules and in the sensing of biomolecules, effluent monitoring and overall pharmaceutical quality control of the product. In that context, it’s important to note that light-carrying fibers are potentially useful as physical sensors of temperature, pressure and rapidation and  as chemical sensors of pH, partial pressure of blood and glucose.

Fiber-optic sensors in biomedical applications

Optromix is a manufacturer of laser technologies, fiber-optic sensors and optical monitoring systems. Optromix provides innovative world-class fiber-optic products to the global market. We provide optical fiber sensors using our own developments based on the research work and patents of an international R&D team. We try to understand and satisfy all the individual and specific needs of our clients in very advanced fields.

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

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ЕлизаветаFiber-optic sensors in biomedical applications

Distributed Acoustic Sensing (DAS) for Gas and Oil Well Monitoring

on February 20, 2018

A new generation of in-well monitoring technologies that are being characterized under the Acoustic Energy sensing banner has been recently developed. There are multiple monitoring techniques that may be classified under the same umbrella, like disturbance or vibration event monitoring; however, distributed acoustic monitoring (DAS) technique has become popular for in-well monitoring applications.

Since the development of fiber optic technology, the fiber optic-based monitoring systems have been used in applications with extreme operating conditions, i.e. extremely high or low temperatures, physical space limitations, unique measurement requirements, etc. The electrical/quartz sensing technology has always has temperature limitation of 150°C, which is does not allow the use of these systems in industries and applications where high temperatures are often present. DAS systems, on the other hand, are based on the fiber optic technology, which allows the systems to be used under much higher temperatures.

Distributed acoustic sensing system allows its user to listen to the acoustic field at every point along the standard telecom single-mode fiber optic cable, which can be several kilometers in length. The fiber optic cable is deployed in a well, where the system monitors its condition and registers production-relevant events. The optic fiber cable used in such a system can be loaded with many sensors, e.g. with a spatial resolution of 1 meter there will be 10.000 synchronized sensors along a 10.000 meter fiber optic cable. Distributed acoustic sensing systems utilize a a novel digital optical detection technique to catch the full acoustic field with great precision: amplitude, frequency and phase over a wide dynamic range. The main advantage of a DAS system is its ability to catch the acoustic field at every point simultaneously.

DAS systems use the combination of backscattered light and and advanced signal processing to segregate the fiber into an array of individual microphones.

Traditionally, distributed acoustic sensing systems have been used in the defence and security industries; however, DAS systems are quickly becoming one of the most effective and cost-efficient ways of in-well monitoring, for example, oil and gas leakages. Another promising field of application of the DAS systems is in the area of hydraulic fracturing of tight-sand and shale-gas reservoirs. The first downhole field trial of a DAS system was conducted in 2009. The technology is sufficiently reliable and sensitive to be used during the fracture-stimulation treatment to monitor the in-well activities.

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.

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) for Gas and Oil Well Monitoring

Fiber Bragg grating sensors for bolt force status monitoring

on February 6, 2018

Over the past decades, bolts support have become a widely used method of roadway roof failure control due to the easy construction and its efficient reinforcement. Moreover, bolts support improve surrounding rock structure stability. Underground coal mining has been extending to deeper levels where high-stress conditions are present; high stress causes roof subsidence and floor heaving in coal mine roadways. This can have a negative effect on the safety of the miners and the construction integrity. Therefore, real-time monitoring of bolts in coal mine roadways is vital for the long-term safety and stability of the surrounding rock structures.

The systems that are used currently for real-time status monitoring of the bolts support structures are easily affected by the harsh environments and high levels of stress. Fiber Bragg grating sensing technology provides a new and effective way of real-time measurements. FBG sensors have become one of the most promising optical fiber passive device applications. Fiber Bragg grating sensors have a variety of applications and are widely used for temperature sensing (FBG temperature sensors), pressure sensing (FBG pressure sensors), acceleration sensing (FBG accelerometers), deformation sensing (FBG displacement sensors), etc.

FBG sensors have multiple advantages over traditionally used measurement equipment: FBG sensors are immune to electromagnetic interference, have a strong multiplexing ability, high reliability and sensitivity. Fiber Bragg grating sensing technology is already used in a variety of applications, like geotechnical engineering, structural engineering, civil engineering, tunnel construction engineering.

The use of FBG sensors in engineering applications shows that fiber optic sensors can automatically acquire, and monitoring results are of great significance in roadway anchorage engineering safety and bolt support quality evaluation.

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.

If you are interested in Optromix FBG sensors, please contact us at info@optromix.com

 

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ЕлизаветаFiber Bragg grating sensors for bolt force status monitoring

Fiber Bragg gratings sensors for extreme environment sensing

on December 21, 2017

Over the past couple of decades, fiber Bragg gratings have been used effectively as sensors for a wide variety of applications. A rapid increase in the popularity of FBG sensors is explained by numerous advantages that they provide. FBG sensors are superior to other traditional means of environment measurement. FBG sensors are immune to electromagnetic interference and are resistant to harsh environments and corrosion. FBG sensors can be multiplexed; this ability was originally developed for optical network applications, however, it can be exploited in order to create sensor geometries that are quasi-distributed. This technology can be used for real-time measurements of temperature, strain, deformation, etc. Some popular and promising applications of fiber optic sensors include structural health monitoring of civil structures, for haptic sensing for robot appendages and ‘smart skins’ for ships or aerospace vehicles.

Distributed FBG sensors are utilized in the oil and gas sector by oil field servicing companies for temperature and pressure monitoring of oil well downholes and reservoirs. Harsh environments of  20 kpsi and 185◦C are common there; the use of FBG sensors provides an accurate measurement and collection of all the data parameters important for the field.

FBG sensors can also be utilized in environments where high temperatures are prevalent. Such environments are often found in within power plants, gas or aerospace turbines, combustion systems, etc. Most FBG temperature sensors are thermally stable at least up to 1000 ◦C in standard telecom fibers.

Another area of application for FBG temperature sensors is gas turbine monitoring. The FBG sensor arrays facilitate measurements of hot gas working temperatures within a turbine; this data is critical for safe, reliable, efficient, and cost-effective operation. Accurate measurements of the blades and vanes inside the turbines will allow preventing overheating of the turbine blades due to inhomogeneous combustions.

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.

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ЕлизаветаFiber Bragg gratings sensors for extreme environment sensing

Fiber Bragg grating sensors for biomechanics and rehabilitation applications

on December 13, 2017

Fiber Bragg grating sensors are becoming increasingly popular and attractive for biomechanics and rehabilitation applications due to their advantageous properties like small size, light weight, biocompatibility, chemical inertness, multiplexing capability and immunity to electromagnetic interference. FBG sensors have been utilized in a variety of different applications, such as aeronautics, automotive, civil engineering structure monitoring and undersea oil exploration. The use of fiber optic sensors for biomechanics and rehabilitation applications is very recent. The full-scale implementation has not been done yet.

FBG strain sensors can be used to measure strain in bones, stresses in intervertebral discs, pressure distribution in Human Machine Interfaces (HMIs), forces induced by tendons and ligaments,  shrinkage stresses in bone cement during polymerization. FBG displacement sensors could be used to measure chest wall deformations, angles between body segments during gait. FBG sensors are especially useful in dental biomechanics.

Applications of fiber Bragg grating sensors in biomechanics and rehabilitation engineering:

  1. Monitoring of biomechanical behavior of the musculoskeletal system;

The measurement of strain on the bones is crucial for understanding bone diseases and in designing medical devices. The measurement of bone strain is conducted using an FBG strain sensors, which helps to study the effects of fracture fixation plates. FBG strain sensors can also be used to understand to what extent the bone calcium loss affects strain response of bone

  1. Strain measurement of bone cement;

Damage to bone cement caused by dynamic loading is one of the main causes of hip replacement failures. The studies of human bone models using FBG strain sensors could be useful to verify the action of the cement, both during the curing process and after consolidation.

  1. Pressure mapping and the measurement of contact forces and stresses of orthopedic joints;

The understanding of contact stress at orthopedic joints is necessary for prostheses research and biomechanics studies. Due to the flexibility and multiplexing capability, FBG sensors are suitable for irregular-shaped interface surfaces, like a knee joint.

  1. Measurement of pressure distribution at the intervertebral disc;

FBG pressure sensors have outperformed other means of measuring pressure distribution at the intervertebral disc due to the small size and biocompatibility.

  1. Dental biomechanics;

FBG sensors are already used in dental applications, for example, monitoring the force and temperature as a function of time in dental splints worn by patients suffering from sleep apnoea.

  1. Monitoring of chest wall movement during respiration.

The studies of biomechanics have benefited greatly from the implementation of FBG sensors to measure chest displacement during respiration. The FBG sensors are embedded into a chest deformable strap which is strained in accordance with the deformation of the chest.

If you are interested in Optromix FBG sensors, please contact us at info@optromix.com

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ЕлизаветаFiber Bragg grating sensors for biomechanics and rehabilitation applications