1 edition of Design and fabrication of a fiber-optic interferometric accelerometer system found in the catalog.
Design and fabrication of a fiber-optic interferometric accelerometer system
Mary Beth A. Chipkevich
by Naval Postgraduate School, Available from the National Technical Information Service in Monterey, Calif, Springfield, Va
|Contributions||Gardner, David L., Brown, David Alan|
|The Physical Object|
|Pagination||77 p. ;|
|Number of Pages||77|
Pipeline Distributed Fiber Optic Monitoring System Source: Sabeus Interferometric and DAS systems can monitor 25 km or longer DTS and DTSS systems have been used to monitor leaks which cause a local temperature drop •Fiber optic interferometric array monitors about 25 Km •Multiple arrays cover hundreds of km •Data transferred through. Advanced Search >. Home > Proceedings > Volume > Article Translator Disclaimer.
Robust solid state design with manual focusing function is ideal for field use or as a cost-effective solution on the production floor. FiBO ® Autofocus system is optimized for fast and easy pass/fail testing of all standard fiber optic connectors and termini. A plurality of Fabry-Perot interferometric sensors are optically coupled in series with each other to form an ordered optical series. Each Fabry-Perot interferometric sensor has a unique signalband and a passband. Each Fabry-Perot interferometric sensor has its unique signalband within the passbands of all of the next higher ordered Fabry-Perot interferometric sensors in .
A push‐pull fiber‐optic accelerometer, using an all‐fiber Michelson interferometer will be described. The accelerometer consists of two “clamped” disks ( cm in diameter, mm thick, aluminum ‐T6) that are joined at the outer boundary to a rigid cylinder and at the disk center by a rigid “spindle” that acts as a seismic mass.. Flat spiral‐wound coils attached . J. Cole, , C. Kirkendall, and A. Dandridge, "The origin, history and future of fiber-optic interferometric acoustic sensors for US Navy applications", in 21st International Conference on Optical Fiber Sensors, held in Ottawa, ON, 15 May , ().
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Design and fabrication of a fiber-optic interferometric accelerometer system Chipkevich, Mary Beth A. iiTitle(includesecurityclassification)DESIGNANDFABRICATIONOFAFIBER-OPTICINTERFEROMETRIC ACCEEEROMFTFRSYSTEM 2PersonalAuthor!vich 13aTypeofReport. DESIGN AND FABRICATION OF A FIBER-OPTIC INTERFEROMETRIC ACCELEROMETER SYSTEM by Mary Beth A.
Chipkevich March Thesis Advisor David L. Gardner Co-Advisor David A. Brown Appo~s Im pubuW mow*. [.'. Design and fabrication of a fiber-optic interferometric accelerometer system. Approved for public release; distribution is unlimitedTwo fiber-optic accelerometer designs are presented.
The first accelerometer was constructed using two flexural disks between which is a center spindle. The second accelerometer design described exploits Author: Mary Beth A. Chipkevich. Experimental results show that the sensitivity of the fiber optic interferometric accelerometer is 57 dB re rad/g; and the noise levels of the three orthogonal components are μg, μg.
Two fiber-optic accelerometer designs are presented. The first accelerometer was constructed using two flexural disks between which is a center spindle. Six uniformly spaced screws fasten the disk assembly to a circular, hollow base housing fiber-optic couplers and splices and providing fiber access.
The disk edge is elastically restrained. A flat spirally wound Cited by: 1. The interferometric fiber optic accelerometer is viewed as a mass-spring transducer housed in a sensor case. The design of the accelerometer housing is such that it is highly immune to.
A detection method based on coherence modulation allows remote acceleration sensing through a fiber-optic link without any electrical link between the measurement region and the signal output.
The sensitivity of the demonstrated system is V g −1 for a measurement range of ±10g and a resolution of less than 1mg. Moreover, the fabrication. This paper presents an extrinsic Mach-Zehnder type accelerometer which utilizes a gap between a fiber cantilever and a fixed fiber.
The problem of light insertion to the single mode fiber across the gap is eased with the use of quarter pitch GRIN lenses. The experimental setup of vibration test system is firstly built up to measure the phase sensitivity of the fiber optic seismic accelerometer, and the diagram is presented in Fig.
2.A commercial piezoelectric accelerometer (Lance, LCT, charge sensitivity pC/g) is used to calibrate the sensitivity, and both accelerometers are placed on the electrodynamics. Recent progress on the development of flexural disk based fiber optic acceleration sensors is reported. Appropriate geometric considerations have resulted in fiber optic accelerometers with many desirable features including (i) high sensitivity (≳20 dB re rad/g), (ii) flat frequency response ( Hz to ≳10 kHz), and (iii) low pressure.
Push–pull fiber‐optic accelerometer/geophone designs employing an all‐fiber Mach–Zehnder interferometer, a 3×3 coupler, and a demodulator system will be described. [Work supported by the Naval Postgraduate School Direct Funded Research Program. Mechanical principles of fibre-optic disc accelerometers (FODA) different from those assumed in previous calculation methods are presented.
An FODA with a high sensitivity of 82 rad/g and a resonance frequency of Hz is designed and tested. In this system, the minimum measurable demodulation phase of the phase-generated carrier (PGC) is 10 −5 rad.
Demonstration of Fiber Bragg Grating (FBG) as sensor by D.J Hill et al. in , was a breakthrough in the field of fiber optic sensors. Optical interferometry as a precision metrology has been widely employed in many aspects for accurate measurements of various physical quantities.
As an important branch of measurement technology, now the fiber-optic interferometry technology, based on fiber-optic and laser technologies, has been developed and widely applied in sensor fields for detections. Fiber optic interferometers to sense various physical parameters including temperature, strain, pressure, and refractive index have been widely investigated.
They can be categorized into four types: Fabry-Perot, Mach-Zehnder, Michelson, and Sagnac. In this paper, each type of interferometric sensor is reviewed in terms of operating principles, fabrication methods, and.
Technical Papers and Presentations. Quick Search. American Institute of Aeronautics and Astronautics Sunrise Valley Drive, Suite Reston, VA The present invention is directed toward an interferometric sensor that permits the simultaneous measurement of a change in more than one environmental condition.
The interferometric sensor comprises an optical fiber and a plurality of sensing regions positioned in an operable relationship to the optical fiber.
Each sensing region has partially reflective boundaries and produces an. A non-contact all-fiber optic acceleration measurement system has been proposed in this work.
Using a fiber delay line in the fiber-optic path, the difference between two Doppler shifted frequencies of a laser beam corresponding to two different velocities of a moving object with a fixed time delay was measured and used for acceleration extraction.
between DTGs, this system has larger capacity than traditional fiber optic geophone system. 2. DTG array fabrication The fabrication technique presented here is based on a near-contact exposure through a phase mask during the fiber drawing process. The draw tower grating fabrication setup is shown in Fig.
1.Abstract: A fiber-optic interferometric sensor has been developed which consists of a seismic mass of gm supported by two rubber mandrels, each wound with a single layer of single-mode optical fiber m long.
One end of each fiber is cleaved to enhance reflection. The other ends are interconnected via a fiber-to-fiber 3-dB coupler, forming a Michelson interferometer.The experimental results show that the thin-core fiber-based fiber-optic accelerometer has a minimum detectable acceleration of Ã—g (g - gravitational acceleration), and a wide frequency response range from 10 to Hz.
Moreover, the proposed accelerometer exhibits the advantages of low cost, simple structure and easy fabrication.