The fiber optic gyroscope fog is a solid state rotation sensor with no moving parts. In the references 6, 8, 19, iae method was examined. A fibreoptic gyroscope fog senses changes in orientation using the sagnac effect, thus. Interference fiber optic gyroscope ifog is a novel optical rotation sensor based on sagnac effect. Data from the fiber optic gyroscope was collected and logged at 10 hz via digital computer while volunteer participants performed a number of standard driving maneuvers and invehicle tasks. Fiberoptic gyroscope technology and ringlaser gyroscope technology. Since then, the level of performance of the fog has been increased by about 3 orders of magnitude, reaching now a bias. The past 30 years of research and development around the world have established the fog as a critical sensor for highaccuracy inertial navigation systems. The device is very different from traditional optical. The relative phase difference is the sagnac phase shift the sagnac effect in vacuum.
A fiber optic gyroscope different from the standard concept is. Yjunction and pair of pushpull lowvoltage phase modulators. 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. S 55 avenue auguste renoir, marlyleroi, france yves. Each filter has a different model and each filter makes its own state prediction and then the system calculates the weighted state variables 6, 20, 21. Emcore fiber optic gyroscopes fog components emcore. This paper describes an inertial navigation system ins for autonomous quad copter application, based on fiber optic gyroscopes fog. These fogs, as theyre known, use light instead of spinning metal to provide more precise stabilization than older gyro schemes.
The fiber optic gyroscope is a direct application of the sagnac interferom eter. As mentioned in the introduction to this thesis, all optical gyroscopes are based on the principles of the sagnac e. Compensation of excess noise in a fiberoptic gyroscope with. The rotation sensing part of a fog consists of a very simple interferometer. This noise is one of the main factors limiting the precision of a fiberoptic gyroscope. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Precision fiber optical gyroscope with linear digital output. 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 very low levels 0.
Evidence is provided with reference to published documents available on demand. Introducti on optical fiber gyroscope the basis for the optical fiber gyroscope is the sagnac effect sagnac, 19. The fiber optic gyroscope market is segmented on the basis of sensing axis, device, application and. Fiber optic sensors fundamentals and applications, fourth edition, 2014 available at. The interference on a sagnac interferometer is proportional to the enclosed area. The fiberoptic gyroscope started to be investigated in the mid 70s, opening the way for a fully solidstate rotation sensor. Fiberopticgyroscope measurements close to rotating liquid. Pdf fiber optical gyroscope for space applications researchgate. Optical gyroscopes of optical gyroscope is the fibreoptic gyroscope, which dispenses with hollow tubes and mirrors in favour of routing the light through thin fibres wound tightly around a small spool. Emcores stateoftheart fiber optic gyroscope fog technology achieves higher performance with lower cswap cost, size, weight and power than competing units and legacy designs.
With the development of socalled laser gyroscopes and fiber optic. The extremely small size of the togs unit allows the system to be used in many underwater applications where space is at a premium. If this instrument consists of optical and solid state material, its defined by fiber optic gyroscope fog. Levi1 1istituto nazionale di ricerca metrologica inrim, strada delle cacce 91, torino 105, italy. 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. Miniaturizable high performance fiber optic gyroscopes for small satellites nasa gsfc sttr nnxcg43c cotr kenneth hall 2011 t4. Alldigital processing electronics invented by ixblue. Pdf the presented method, based on the theory and equations of fiber optic gyroscope, gives a possibility to select appropriate interferometric fiber.
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. Fiberoptic gyroscope accuracy improvement by suppressing the. Mar 10, 2020 a fiber optic gyroscope is a device that measures rotational movement of the platform or object it is on through the use of fiber optic technology. It is sometimes part of a ships set of compasses, which also include a conventional gyrocompass and a magnetic compass. What links here related changes upload file special pages permanent link page.
The global fiber optics gyroscope market is highly competitive and dominated by few major players in the global market. Nov 09, 2015 3d printed fiber optic gyroscope sagnac interferometer duration. Global fiber optics gyroscope market is expected to witness a steady growth during the forecast period from 2017 to 2025. Interference fiber optic gyroscope semantic scholar. The sagnac effect, also called sagnac interference, named after french physicist georges. Theoretical design of a depolarized interferometric fiberoptic gyroscope ifog on smf28 singlemode standard optical fiber based on closedloop sinusoidal phase modulation with serrodyne feedback phase modulation using simulation tools for tactical and industrial grade applications. We report the first proofofprinciple demonstration of the resonant optical gyroscope with reflector that we have recently proposed.
Barriers absence of laser lack of experience working with optical fibers machine shop 7. Theoretical design of a depolarized interferometric fiber. A simplified user interface the master control unit contains the systems memory and supervises all the new technology, but kvhs homegrown fiber optic gyro devices remain at the systems heart. As the fog lack the mechanical components of the age old traditional gyroscopes, they show good performance in terms of weight, size, sensitivity, robustness and resistance to physical forces. It is shown theoretically that the excess noise of the radiation source can be compensated in a fiberoptic gyroscope with a 3. A novel design of fiber optic gyroscope based ins system for. Applications areas for various gyroscope technologies, laser ring gyroscopes, fiber optic gyroscope and mems gyroscopes. Design and construction of a simple sagnac interferometer fiber optic gyroscope fog capable of serving as a rotation detector. This platform can be anything that moves, including a car, boat, airplane or spacecraft. Design of integrated hybrid silicon waveguide optical. A compact fiber optic gyroscope including a first housing. Ifog coil winding quadrupole wet, dry, flanged, hubbed or freestanding. Fiber optic gyroscope pdf theory gyroscope optical fiber scribd. Fiber optic gyroscope market size, share, growth, trends.
Fiber optical solution s fiberoptic strapdown inertial navigation systems sins have complete solidstate design with no rotating or other moving parts. The results illustrate the versatility of the technology, showing its potential. A gimbal mounted mechanical gyroscope remains pointing in the same direction after spinning. Modulated phase is used to compensate the phase of sagnac effect in digital closed. A fibreoptic gyroscope fog senses changes in orientation using the sagnac effect, thus performing the function of a mechanical gyroscope. Fiber optic 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. An overview of optical gyroscopes theory, practical. Why peoples are crying and what is the benefits of the crying. Sagnac interferometer for gravitationalwave detection pdf.
This video is only for educational purpose not for personal profits. We used a militarygrade optolink srs fiber optic gyroscope, which is mounted on a support structure outside the cryostat allowing it to change its position and orientation all around the cryostat. Jul 04, 2018 the implementation of the fiber optic gyroscope is mainly based on the segnik theory. Bias errors due to birefringent coupling centers in the fiber coil are avoided by using an unpolarized light source. The electronic part is a processing pcb that converts the optical module output into rate proportional voltages. Another key application for sled is in navigation systems, primarily those in avionics and aerospace that use fiber optic gyroscopes fogs to make precise rotation measurements 11,12. 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. The phase accumulated by a light wave, which propagates along a slowly rotating circular path, depends linearly on the rotation rateofthepath. Because it has no moving parts, there is nothing to go out of alignment and therefore it never requires recalibrating and is totally maintenance free. A fiber optic gyroscope is most often used for stabilization and navigation. The results of study of a fiberoptic gyroscope prototype with 0. The compass comprises a fibre optic gyroscope sensor, which links to a computer and then locates north. Fogs measure the sagnac phase shift of optical radiation propagating along a fiber optic coil when it rotates around the winding axis.
The cryostat has such a shape, that the gyroscope can be inserted along the middleaxis up to the center of the rotating pot see figure 2. How to build a sagnac interferometer fiber optic gyroscope. Napolitano 102010 fabien napolitano ixsea, an ixblue company chief product development officer 1 introduction this paper is a short analysis of key technological advantages of fiber optic gyroscope fog. Fiber optics gyroscope market by sensing axis 1, 2, and 3, device gyrocompass, inertial measurement unit, inertial navigation system, and attitude heading reference system, application, and geography global forecast to 2022. Automatic north sensor using a fiberoptic gyroscope. A looped fibreoptic coil multiplies the effective area by the number of loops. A fiber optic gyroscope different from the standard concept is presented.
Inertial rotation is measured in ifog as the phase difference between two lightwaves traveling in opposite direction around fiber optic sensing loop. The fibre optic gyroscope fog offers the potential of a low cost, high performance strap down inertial navigational instrument. We propose and analyze a novel highly integrated optical gyroscope. The saab fog sensor is a fiber optic ring interferometer comprising fiber coil, phase modulator, two fused fiber optic couplers, fiber optic polariser, superluminescent light module and photo receiving module with preamplifier. Miniaturizable high performance fiber optic gyroscopes for. The fiber optic gyroscope a sagnac interferometer for. 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. Largearea fiber optic gyroscope on a multiplexed fiber network c. Largearea fiberoptic gyroscope on a multiplexed fiber network. Fiber optic gyroscope pdf theory free download as pdf file.
153 253 1117 1332 200 1267 1014 89 1119 1042 1012 1012 844 1004 305 674 830 1553 1098 1531 862 1436 1352 50 1473 913 1399 123 1062 1250 826 1093 1204 1069 158 1628 104 221 965 1143 628 1465 171 882 197 655 610 521 967