The fiberoptic gyroscope, second edition, lefevre, herve. Light beams propagating in opposite directions in a rotating frame experience. On the basis of sensing axis, market is fragmented into 3axis, 2 axis, 1 axis. This platform can be anything that moves, including a car, boat, airplane or spacecraft. Fiber optics gyroscope market is ruled by asia pacific excluding japan in the near future due to the rise in industrial areas in developing countries, fiber optics gyroscope market driven by increase in demand in defense sector. Jin, laser frequency noise limited sensitivity in a resonator optic gyroscope, in proceedings to the 15th optoelectronics and communications conference, 706 707 ieee, sapporo, 2010. Fiberoptic gyroscopes fogs represent an important development in the field of inertial sensors and are now considered an alternative technology to mechanical and ring laser gyroscopes for inertial navigation and control applications.
The interferometric fiberoptic gyro is to date a mature technology and. A novel design of fiber optic gyroscope based ins system. The fiberoptic gyroscope, second edition kindle edition by lefevre, herve c download it once and read it on your kindle device, pc, phones or tablets. Yoshiaki hayakawa and akihiro kurokawa outlook of fiberoptic. A fiber optic gyroscope different from the standard concept is. Zhengyi zhang 0 0 department two, rocket force university of engineering, xian, 710025, china in view of the problems such as the lower automation level and the insufficient precision of the traditional fiber optic gyroscope fog static north. Fibre optic gyroscopes b culshaw and i p giles department of electronic and electrical engineering, university college london, torrington place, london wc 1e 7je, uk abstract. A fibre optic gyroscope fog senses changes in orientation using the sagnac effect, thus performing the function of a mechanical gyroscope. An overview of optical gyroscopes theory, practical. Global fiber optic gyroscope market is growing at a significant rate in the forecast period 20182025 fiber optic gyroscope market is expected to reach usd 1,675. Realizing the potential of the fiber optic gyro, like the ring laser gyro, has been a long and expensive process. The fibre optic gyroscope fog offers the potential of a low cost, high performance strap down inertial navigational instrument.
Barriers absence of laser lack of experience working with optical fibers machine shop 7. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. Saabs fiber optic gyros, fog, are designed to provide maximum stabilisation in tough environments. A fibreoptic gyroscope fog senses changes in orientation using the sagnac effect, thus performing the function of a mechanical gyroscope. Fiber optics gyroscope market size, share, growth, trends.
It is of interest to consider alternative approaches to the. Take fringe areas such as the caribbean, where reception can be so bad that stabilized antennas using traditional technology must be at least 42 inches in diameter and housed in a 50inch dome. If this instrument consists of optical and solid state material, its defined by fiber optic gyroscope fog. With a 7 year legacy of winding all types of precision optical fiber coils, idealphotonics has the coil winding business unit with a team of highly experienced scientists, engineers, and winders, together capable of winding the best in optical fiber coils in accordance with customers requirements. The interferometer includes a beam splitter and a single length of fiber formed into a loop. This paper is a short analysis of key technological advantages of fiberoptic gyroscope fog technology for high performance applications over competing. Yjunction and pair of pushpull lowvoltage phase modulators. This effect shows that the propagation time of light. Interference fiber optic gyroscope semantic scholar. Theoretical design of a depolarized interferometric fiber. Largearea fiberoptic gyroscope on a multiplexed fiber network c. The fiber optic gyroscope fog is based on the sagnac effect.
Unlike in an interferometric fiber optic gyroscope ifog, here the counterpropagating waves in the sagnac loop are orthogonally polarized at the loop exit and. They feature solidstate, lowdrift, high shock usability, small size and short startup time and are available as basic single axis fog sensor, 1, 2. Fiber optic gyro 8088 000112 the fiber optic gyro fog is a compact, solid state, single axis rate sensor. The extremely small size of the togs unit allows the system to be used in many underwater applications where space is at a premium. The anomalous gyroscope signal is about 8 orders of magnitude smaller then the applied angular ring velocity, compensating about one third of the earth rotation. The past 30 years of research and development around the world have established the fog as a critical sensor for highaccuracy inertial. The implementation of the fiber optic gyroscope is mainly based on the segnik theory. The rotation sensing part of a fog consists of a very simple interferometer. Fiber optic gyroscope dynamic northfinder algorithm. Technical meeting of the institute of navi gation, san mateo, calif.
Use features like bookmarks, note taking and highlighting while reading the fiberoptic gyroscope, second edition. The compass comprises a fibre optic gyroscope sensor, which links to a computer and then locates north. Thanks to the ultralow propagation loss in optic fibers, ifogs was able to achieve extremely high sensitivity and has become a mature technology for inertial navigation systems 1. A fibre optic gyrocompass is a compass and instrument of navigation. Fiber optic gyroscope market size, share, growth, trends. Levi1 1istituto nazionale di ricerca metrologica inrim, strada delle cacce 91, torino 105, italy 2politecnico di torino, corso duca degli abruzzi 24, torino 10129, italy corresponding author. Other articles where fiberoptic gyroscope is discussed. Scope of the presentation 4 the fiber optic gyroscope shall be described within this presentation, at first focusing on the interferometric roots according to sagnacs effect.
Introduction fog are the latest inertial sensors that have replaced the traditional mechanical gyroscopes 1, owing to promising advantages like no moving parts, substantially nil loss, negligible wear, long life, vibration resistance and shock resistance, flexibility. The proportionality factor that precedes the rotationratio is known as the scalefactor sf of the gyroscope. Since then, the level of performance of the fog has been increased by about 3 orders of magnitude, reaching now a bias. This in turn links to a compass readout to provide a heading. Fiber optic gyro the teledyne cdl togs tiny optical gyro system is a low cost fog fibre optic gyro based north seeking compass for use on vessels and remotely operated vehicles rovs. Introducti on optical fiber gyroscope the basis for the optical fiber gyroscope is the sagnac effect sagnac, 19. In this chapter we show how the basic interferometric fiberoptic gyro ifog, the sagnac interferometer described in chapter 11, is operated at its. Over the last decade, the research and development of a fiber optic gyroscope fog has made remarkable progress, and it is now recognized that this new technology will take the place of a traditional gyroscope during the 1990s.
The fiber optic gyroscope a sagnac interferometer for. The light from the external source s is split by the beamsp1itter bs and travels in. The presented method, based on the theory and equations of fiber optic gyroscope, gives a possibility to select appropriate interferometric fiber optic gyroscope ifog parameters and components. Our mission is to build the smallest and lightest navigationgrade and strategicgrade inertial systems. Ppt optical gyroscope powerpoint presentation free to.
Automatic north sensor using a fiberoptic gyroscope. Largearea fiberoptic gyroscope on a multiplexed fiber. Fiberoptic gyroscope technology and ringlaser gyroscope technology. Fiber optic sensors fundamentals and applications, fourth edition, 2014 available at. Design and construction of a simple sagnac interferometer fiber optic gyroscope fog capable of serving as a rotation detector. Analysis and optimization of dynamic measurement precision. How to build a sagnac interferometer fiber optic gyroscope fog doug marett 2010 our instructional video on youtube. Active, expires 20320322 application number us78,428 inventor ronald t. However its principle of operation is instead based on the interference of light which has passed through a coil of optical fibre, which can be as long as 5 km. Fibernetics is a us manufacturer of fiber optic gyroscope fogbased inertial systems. Many researchers have made important enabling contributions, and many more engineers have worked diligently for many years on solving the problems associated with realizing viable inertial navigation and guidance produce at affordable costs. An interferometric fiber optic gyroscope is formed by three essential components. A fiberoptic gyroscope is a device that measures rotational movement of the platform or object it is on through the use of fiberoptic technology.
Bias errors due to birefringent coupling centers in the fiber coil are avoided by using an unpolarized light source. It was firstly seen as limited to mediumgrade applications, but today, it reaches ultimate theoretical performance and surpasses its wellestablished competitor, the ring laser gyroscope, in terms of bias noise and longterm stability. A fiber optic gyroscope different from the standard concept is presented. In the past, wavelength stability over time was a major drawback of semiconductor based broadband light sources like sleds compared with fiberbased light sources such as erbiumdoped. Ifog coil winding quadrupole wet, dry, flanged, hubbed or freestanding. A fiberoptic gyroscope is most often used for stabilization and navigation. S 55 avenue auguste renoir, marlyleroi, france yves. Journal of the european optical society rapid publications. Inertial rotation is measured in ifog as the phase difference between two lightwaves traveling in opposite direction around fiberoptic sensing loop. It is sometimes part of a ships set of compasses, which also include a conventional gyrocompass and a magnetic compass.
Various categories of fiber optics gyroscope on the basis of device market has been segmented into gyrocompass, inertial measurement unit, attitude. We demonstrate that by driving a fiber optic gyroscope fog with a laser of relatively broad linewidth 10 mhz, both the noise and the bias drift are reduced to. The first integrated optical driver chip for fiber optic. The key requirements for fiber optic gyroscopes are typically low cost, reduced form factor, low power consumption, longterm stability and high reliability. Optical part this part is a fiber optic ring interferometer comprising fiber coil, phase modulator, two fused fiber optic couplers, fiber optic polarizer, super luminescent. An overview of optical gyroscopes theory, practical aspects, applications and future trends by adi shamir 1 may 16, 2006. Protonexchanged linbo 3 integratedoptic circuit very high polarizer rejection manufactured by ixblue. Modulated phase is used to compensate the phase of sagnac effect in digital closed.
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