Download or read book Fiber Optic Microbend Pressure Sensor Evaluated in a High Temperature Environment written by David Robert Rosander and published by . This book was released on 1993 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fiber Optic Microbend Pressure Sensor Evaluated in a High Temperature Environment written by David C. Majercak and published by . This book was released on 1991 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fiber Optic Microbend Pressure Sensor Designed for High temperature Applications written by Robert J. Ferina and published by . This book was released on 1990 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fiber Optic and Laser Sensors VII written by Eric Udd and published by SPIE-International Society for Optical Engineering. This book was released on 1990 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of a MEMS Fiber optic Pressure Sensor Based on Optical Interferometry written by Pedro Cordero Meza and published by . This book was released on 2017 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main focus of this thesis is the development of a MEMS optical pressure sensor capable of giving real-time, accurate measurements to a mid-high pressure range. Some traditional devices for acquisition of parameters such as pressure or temperature have proven to be insufficient to the demands of the markets of research and manufacturing. State-of-the-art sensing technology has led to the construction of more reliable configurations that push the limits of traditional devices. Using micro-machined components is a suitable approach for applications that show restrictions just as limited space, noise measurement or interference created by the inaccuracy of electronic components that are not suited to be in close contact with the sensing medium. A study of the current optical based technologies revealed the current use of extrinsic Fabry - Perot interferometers in the fields of medical, biotechnological and industrial applications. Each field presents a general specific limitation, given the nature of its environment. These mostly include low pressure and temperature ranges, non-protected sensors or super sensitive, expensive devices., The operation of this sensor comprises a non-emissive, optically powered device that shows precision measurements and immunity to electromagnetic interference. Tested over a mid-high pressure range that shows a 20% improvement over the devices found in literature. This sensor is the result of the coupling of a multimode silica optical fiber, a MEMS pressure sensor with a thin silicon film and a stainless steel housing for packaging. A theoretical analysis and response simulations were used previous and along the process of construction and testing of the device. This analysis was followed by an assessment on the materials that were suitable for the assembling of the device, plus the pertinent modifications for each component that allowed a proper coupling. Several tests were done previous to the final assembly of the device, where calibration, alignment and limitations of the device were studied previous to determine the sensor's response. The experiments were done at the SimsLab of the University of Waterloo, using a pressure chamber with direct connection to the housing of the sensor to avoid pressure leaks. The sensor's properties include a silicon thin film with a thickness of 34 micrometers, an optical fiber with a core diameter of 125 micrometers, protected by a ceramic ferrule to provide stability and rigidity to the fiber. The fiber is part of a coupler that splits the optical signal between the input and output beams. The output leg of the coupler then sends the information to an OSI (Optical Sensor Interrogator) which is a set of electronics that use a photo detector to break the light into its spectral components, analyzing fringes and converting the photons into electrons which are digitized as a function of the wavelength and read out via a USB port into a host computer. A LabView program then converts the optical response to a value in millivolts that can be directly related to the changes in pressure that are detected by the deflective silicon membrane. A complete characterization of the sensor's response was carried out. An averaged sensitivity of 1.3768 mV / psi over a range of 0 - 100 psi was found. An accuracy of 1.25 psi per 0.1 mV was established. The Noise Equivalent Pressure measurement could to be neglected over the accuracy that is limited by the capacity of the electronics. In summary, an Optical MEMS pressure sensor was developed. This device is capable of being tested in laboratory and manufacturing-like simulated environments. The pressure measurements acquired during this project assisted the base for a future prototype to be developed in enhancing the pressure range in a harsh environment, with elevated temperature. Proof-of-concept data was gathered and analyzed so further advances can be reached on micro-fabrication and optical techniques.
Download or read book Fiber Optic and Laser Sensors written by and published by . This book was released on 1991 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monitoring and Safety Evaluation of Existing Concrete Structures written by fib Fédération internationale du béton and published by fib Fédération internationale du béton. This book was released on 2003 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: The condition assessment of aged structures is becoming a more and more important issue for civil infrastructure management systems. The continued use of existing systems is, due to environmental, economical and socio-political assets, of great significance and is growing larger every year. Thus the extent of necessary repair of damaged reinforced concrete structures is of major concern in most countries today. Monitoring techniques may have a decisive input to limit expenditures for maintenance and repair of existing structures. Modern test and measurement methods as well as computational mechanics open the door for a wide variety of monitoring applications. The need for quantitative and qualitative knowledge has led to the development and improvement of surveillance techniques, which have already found successful application in other disciplines such as medicine, physics and chemistry. The design of experimental test and measurement systems is inherently an interdisciplinary activity. The specification of the instrumentation to measure the structural response will involve the skills of civil, electrical and computer engineers. The main aim of fib Commission 5, Structural servicer life aspects, is to provide a rational procedure to obtain an optimal technical-economic performance of concrete structures in service and to ensure a feedback of experience gained to design, execution, maintenance and rehabilitation. Against this background fib Task Group 5.1 Monitoring and Safety Evaluation of Existing Concrete Structures had been established to evaluate the existing practice worldwide. The objective of this state-of-art report is to summarize the most important inspection and measuring methods, to describe the working process and to evaluate the applicability to structural monitoring. Particular emphasis is placed upon non-destructive systems, lifetime monitoring, data evaluation and safety aspects.
Download or read book High Temperature Fiber optic Pressure Sensor with Built in Temperature Sensor written by Satoshi Hachiya and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elastic and Geometric Effects on Microbend Fiber Optic Pressure Sensors written by Perdita Bianca Lloyd and published by . This book was released on 2002 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book Tenth International Conference on Optical Fibre Sensors written by Julian D. C. Jones and published by SPIE-International Society for Optical Engineering. This book was released on 1994 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Optical Acoustic Magnetic and Mechanical Sensor Technologies written by Krzysztof Iniewski and published by CRC Press. This book was released on 2017-12-19 with total page 357 pages. Available in PDF, EPUB and Kindle. Book excerpt: Light on physics and math, with a heavy focus on practical applications, Optical, Acoustic, Magnetic, and Mechanical Sensor Technologies discusses the developments necessary to realize the growth of truly integrated sensors for use in physical, biological, optical, and chemical sensing, as well as future micro- and nanotechnologies. Used to pick up sound, movement, and optical or magnetic signals, portable and lightweight sensors are perpetually in demand in consumer electronics, biomedical engineering, military applications, and a wide range of other sectors. However, despite extensive existing developments in computing and communications for integrated microsystems, we are only just now seeing real transformational changes in sensors, which are critical to conducting so many advanced, integrated tasks. This book is designed in two sections—Optical and Acoustic Sensors and Magnetic and Mechanical Sensors—that address the latest developments in sensors. The first part covers: Optical and acoustic sensors, particularly those based on polymer optical fibers Potential of integrated optical biosensors and silicon photonics Luminescent thermometry and solar cell analyses Description of research from United States Army Research Laboratory on sensing applications using photoacoustic spectroscopy Advances in the design of underwater acoustic modems The second discusses: Magnetic and mechanical sensors, starting with coverage of magnetic field scanning Some contributors’ personal accomplishments in combining MEMS and CMOS technologies for artificial microsystems used to sense airflow, temperature, and humidity MEMS-based micro hot-plate devices Vibration energy harvesting with piezoelectric MEMS Self-powered wireless sensing As sensors inevitably become omnipresent elements in most aspects of everyday life, this book assesses their massive potential in the development of interfacing applications for various areas of product design and sciences—including electronics, photonics, mechanics, chemistry, and biology, to name just a few.
Download or read book Fiber Optic Sensors written by Eric Udd and published by John Wiley & Sons. This book was released on 2024-03-28 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Expanding the Vision of Sensor Materials written by Committee on New Sensor Technologies: Materials and Applications and published by National Academies Press. This book was released on 1995-07-06 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in materials science and engineering have paved the way for the development of new and more capable sensors. Drawing upon case studies from manufacturing and structural monitoring and involving chemical and long wave-length infrared sensors, this book suggests an approach that frames the relevant technical issues in such a way as to expedite the consideration of new and novel sensor materials. It enables a multidisciplinary approach for identifying opportunities and making realistic assessments of technical risk and could be used to guide relevant research and development in sensor technologies.
Download or read book Development of a Fiber Optic High Temperature Strain Sensor written by National Aeronautics and Space Adm Nasa and published by . This book was released on 2018-11-07 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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...
Download or read book Chemical Biochemical and Environmental Fiber Sensors written by and published by . This book was released on 1991 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diaphragm Optimization for a Fiber Optic High Frequency High Temperature Micro pressure Sensor written by Jared Dolatowski and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
