Development Of A Fiber Optic High Temperature Strain Sensor
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Author | : National Aeronautics and Space Adm Nasa |
Publisher | : |
Total Pages | : 106 |
Release | : 2018-11-07 |
Genre | : |
ISBN | : 9781730992179 |
From 1 Apr. 1991 to 31 Aug. 1992, the Georgia Tech Research Institute conducted a research program to develop a high temperature fiber optic strain sensor as part of a measurement program for the space shuttle booster rocket motor. The major objectives of this program were divided into four tasks. Under Task 1, the literature on high-temperature fiber optic strain sensors was reviewed. Task 2 addressed the design and fabrication of the strain sensor. Tests and calibration were conducted under Task 3, and Task 4 was to generate recommendations for a follow-on study of a distributed strain sensor. Task 4 was submitted to NASA as a separate proposal. Rausch, E. O. and Murphy, K. E. and Brookshire, S. P. Unspecified Center FIBER OPTICS; HIGH TEMPERATURE RESEARCH; HIGH TEMPERATURE TESTS; OPTICAL FIBERS; SENSORS; STRAIN GAGES; STRAIN MEASUREMENT; CALIBRATING; FABRICATION; HIGH TEMPERATURE; SILICON DIOXIDE...
Author | : Ekkehart Otto Rausch |
Publisher | : |
Total Pages | : |
Release | : 1991 |
Genre | : Fiber optics |
ISBN | : |
Author | : Luc Thevenaz |
Publisher | : Wiley |
Total Pages | : 250 |
Release | : 2012-03 |
Genre | : Technology & Engineering |
ISBN | : 9781118331507 |
Serving as a unique, efficient solution to modern demands for security and safety sensing, distributed optical fiber sensing are critical components in areas such as natural disaster prevention and civil engineering. The unique book provides detailed explanations on how to install early warning systems for the prevention of natural disasters, flaws in civil engineering structures (dams, bridges, tunnels), and issues in the oil industry (pipeline leakage detection, off-shore platform anchoring.) Addressing the principles and specificities of distributed fiber sensing, this resource shows different possible implementations, their potential, and their limitations.
Author | : National Aeronautics and Space Administration (NASA) |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 38 |
Release | : 2018-06-19 |
Genre | : |
ISBN | : 9781721297450 |
The objective of the program is the development and laboratory demonstration of sensors based on silica optical fibers for measurement of high temperature strain for aerospace materials evaluations. A complete fiber strain sensor system based on white-light interferometry was designed and implemented. An experiment set-up was constructed to permit testing of strain measurement up to 850 C. The strain is created by bending an alumina cantilever beam to which is the fiber sensor is attached. The strain calibration is provided by the application of known beam deflections. To ensure the high temperature operation capability of the sensor, gold-coated single-mode fiber is used. Moreover, a new method of sensor surface attachment which permits accurate sensor gage length determination is also developed. Excellent results were obtained at temperatures up to 800-850 C. Wang, A. Langley Research Center
Author | : Eric Udd |
Publisher | : John Wiley & Sons |
Total Pages | : 628 |
Release | : 2024-03-28 |
Genre | : Science |
ISBN | : 1119678862 |
FIBER OPTIC SENSORS Discover the latest in fiber optic sensors and their applications in this new edition Fiber-optic sensors are a powerful class of sensor that uses high-bandwidth optical fibers to convey a large amount of measured information through a single fiber. The advantages of such a mode of measurement are clear: they are intrinsically safe in explosive environments (no sparks), lightweight, compact, robust, and potentially inexpensive. As a result, their uses are manifold for a wide range of physical and chemical phenomena including temperature, strain, pressure, acoustic fields, position, velocity, rotation, acceleration, electrical current, liquid level, biochemical composition, and chemical concentration. Fiber Optic Sensors introduces and familiarizes the reader with a broad range of fiber optic sensor techniques and applications. The latest edition of this popular text builds upon the sound introductions to the fundamentals of the topic provided by earlier editions by introducing the latest technologies that have been developed in recent years. Gathering the latest research and publications on the subject in one place, the book provides a comprehensive look at fiber optic sensors with an eye to what’s new in the field. Readers of Fiber Optic Sensors’ third edition will also find: An exploration of the technology within new applications in areas such as aerospace, defense, oil and gas, medical, electric power, manufacturing, environmental, and robotics Updated chapters on the emergency of interferometric sensors, distributed sensing, and critical components A new and fully-updated comprehensive index Fiber Optic Sensors is a useful reference for engineers, scientists, technical managers, as well as advanced undergraduate and graduate students.
Author | : Regis J. Van Steenkiste |
Publisher | : CRC Press |
Total Pages | : 336 |
Release | : 1996-12-02 |
Genre | : Technology & Engineering |
ISBN | : 9781566764803 |
FROM THE AUTHORS' PREFACE Sensors operating on interferometric principles and mounted inside optical fibers have recently been considered for measuring strain and temperature. Indeed, such sensors have successfully been employed for measuring pressure or temperature in fluids. Fiber optics sensors are especially adept for such measurements because sensors immersed in fluids can easily be calibrated by tests. Unfortunately, the use of fiber optic sensors inside solids is not as straightforward. Owing to the complex interactions between the sensor and the surrounding material, the relationship between the sensor output and the parameters of interest, namely the strain and temperature inside the material, cannot be determined by simple tests. And without the appropriate relationships, fiber optic sensors do not provide meaningful information. In general, the relationship providing the bridge between the sensor output and the engineering values of strain and temperature must be established via analytical models. The major aim of this book is to present such models for extrinsic and intrinsic Fabry-Perot sensors and for Bragg grating sensors embedded in or mounted on the surface of isotropic or anisotropic solids or immersed in fluids. The scope of the book is limited to the theory of fiber optic strain and temperature sensors. Accordingly, we have taken as our starting point the demodulated sensor signals. The hardware needed to produce these signals is not discussed. It is presumed that the reader is familiar with and has access to the sensor, light source, light detector and demodulator required for generating signals which can then be analyzed and interpreted by the methods presented in the book. The problem necessitates complex analytical developments. To assist the reader, the significant results are summarized in tables, and numerical examples are given illustrating the calculation procedures.
Author | : Neil J. Guillermo |
Publisher | : |
Total Pages | : 0 |
Release | : 1999 |
Genre | : |
ISBN | : |
The development of temperature compensated fiber optic strain sensors based on fiber Bragg gratings is reported. The various sensors manufactured and tested include a stainless steel capillary tube-encased Bragg grating, a partially-bonded Bragg grating, and a fully embedded Bragg grating. Strain and temperature resolution is accomplished by measuring the characteristic Bragg wavelength shift of each Bragg grating sensor relative to its initial wavelength. Another measurement technique used involves calculating the differential strain measurement between two dissimilar resistive strain gauges to determine strain and temperature. Testing is done using both a self-made convection and industrial oven to regulate the temperature, as well as applying strain to the specimen via bending or tension. The performance of the sensors in tracking the strain and temperature in variable strain and variable temperature environments is reported and evaluated. The development of an in-lab convection oven and a stress machine specifically designed for this thesis is also described. Suggestions are made for improvements to the sensors in addition to further developmental research and possible practical temperature compensated fiber optic strain sensor applications.
Author | : Markus G. R. Sause |
Publisher | : Springer Nature |
Total Pages | : 292 |
Release | : 2021 |
Genre | : Aerospace engineering |
ISBN | : 3030721922 |
This open access book presents established methods of structural health monitoring (SHM) and discusses their technological merit in the current aerospace environment. While the aerospace industry aims for weight reduction to improve fuel efficiency, reduce environmental impact, and to decrease maintenance time and operating costs, aircraft structures are often designed and built heavier than required in order to accommodate unpredictable failure. A way to overcome this approach is the use of SHM systems to detect the presence of defects. This book covers all major contemporary aerospace-relevant SHM methods, from the basics of each method to the various defect types that SHM is required to detect to discussion of signal processing developments alongside considerations of aerospace safety requirements. It will be of interest to professionals in industry and academic researchers alike, as well as engineering students. This article/publication is based upon work from COST Action CA18203 (ODIN - http://odin-cost.com/), supported by COST (European Cooperation in Science and Technology). COST (European Cooperation in Science and Technology) is a funding agency for research and innovation networks. Our Actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their peers. This boosts their research, career and innovation.
Author | : Vistasp M. Karbhari |
Publisher | : Elsevier |
Total Pages | : 553 |
Release | : 2009-08-25 |
Genre | : Technology & Engineering |
ISBN | : 1845696824 |
Structural health monitoring is an extremely important methodology in evaluating the ‘health’ of a structure by assessing the level of deterioration and remaining service life of civil infrastructure systems. This book reviews key developments in research, technologies and applications in this area of civil engineering. It discusses ways of obtaining and analysing data, sensor technologies and methods of sensing changes in structural performance characteristics. It also discusses data transmission and the application of both individual technologies and entire systems to bridges and buildings. With its distinguished editors and international team of contributors, Structural health monitoring of civil infrastructure systems is a valuable reference for students in civil and structural engineering programs as well as those studying sensors, data analysis and transmission at universities. It will also be an important source for practicing civil engineers and designers, engineers and researchers developing sensors, network systems and methods of data transmission and analysis, policy makers, inspectors and those responsible for the safety and service life of civil infrastructure. Reviews key developments in research, technologies and applications Discusses systems used to obtain and analyse data and sensor technologies Assesses methods of sensing changes in structural performance
Author | : W. Dan Williams |
Publisher | : |
Total Pages | : 246 |
Release | : 1996 |
Genre | : Strain gages |
ISBN | : |
This report describes Government Work Package Task 29 (GWP29), whose purpose was to develop advanced strain gage technology in support of the National Aerospace Plane (NASP) Program. The focus was on advanced resistance strain gages with a temperature range from room temperature to 2000 F (1095 C) and on methods for reliably attaching these gages to the various materials anticipated for use in the NASP program. Because the NASP program required first-cycle data, the installed gages were not prestabilized or heat treated on the test coupons before first-cycle data were recorded. NASA Lewis Research Center, the lead center for GWP29, continued its development of the palladium-chromium gage; NASA Langley Research Center investigated a new concept gage using Kanthal A1; and the NASA Dryden Flight Research Center chose the well-known BCL-3 iron-chromium-aluminum gage. Each center then tested all three gages. The parameters investigated were apparent strain, drift strain, and gage factor as a function of temperature, plus gage size and survival rate over the test period. Although a significant effort was made to minimize the differences in test equipment between the three test sites (e.g., the same hardware and software were used for final data processing), the center employed different data acquisition systems and furnace configurations so that some inherent differences may be evident in the final results.