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Advanced Fiber Optic Gyroscopes

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Prof. Dr. Yuanhong Yang

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School of Instrumentation and Optoelectronic Engineering, Beihang University, Beijing 100191, China
Interests: optical fiber sensing and related technologies: fiber optic gyroscope, fiber grating, fiber gas (hydrogen (H₂), etc.); fiber distribution sensing technology, quantum sensing technology, etc.

Special Issue Information

Dear Colleagues,

Fiber-optic gyroscopes (FOGs) are key instruments for rotation measurement in the field of inertial technology. Although they have been under development for more than 40 years, it is still a fascinating research area. The research in the field is focused on further suppressing the drift and noise caused by temperature and its variation, and on improving the performance of interferometric FOG. As resonant fiber-optic gyroscopes have unique advantages, breakthroughs in technical scheme, fiber material and detection technology are urgently required.

This Special Issue therefore aims to gather original research and review articles on recent advances, technologies, solutions, applications, and new challenges in the field of FOG.

Potential topics include, but are not limited to:

High-precision FOG technology and applications;
Drift and noise caused by temperature and its variation as well as error suppression measures;
Resonant FOG scheme and technology;
Special optical fibers and components for FOG;
Novel signal detection techniques and intelligent algorithms;
Special measurement and evaluation technology for FOG optical path and devices.

Prof. Dr. Yuanhong Yang
Guest Editor

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Keywords

fiber-optic gyroscopes
resonant fiber-optic gyroscopes
integrated fiber-optic gyro
temperature drift
shupe effect
rotation sensing

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15 pages, 4270 KiB

Open AccessArticle

The Properties of a Ship’s Compass in the Context of Ship Manoeuvrability

by Andrzej Felski and Krzysztof Jaskólski

Sensors 2023, 23(3), 1254; https://doi.org/10.3390/s23031254 - 21 Jan 2023

Viewed by 1368

Abstract

In evaluating the accuracy of most navigation measuring systems, it is accepted, as a rule, that measurement errors are characterised by a normal distribution. With reference to the compass, the approach of most producers is similar. However, in the case of this measuring device, the dynamics of the ship should also be taken into account. The problem is that any changes in the ship’s heading can be measured exclusively with the use of a compass. Until quite recently, this device was built based on mechanical elements, so it possessed its own dynamic properties. This means the appearance of specific, positive feedback (self-reinforcing feedback) because if the compass did not point to the correct heading, it could lead the ship to stray from the correct heading. On the other hand, it could mean an incorrect compass setup, even though the ship had the correct heading. Any incorrect indications of the compass were then interpreted as a ship’s departure from the correct heading. This problem was not essential in the era of magnetic compasses because the errors in these compasses are relatively constant, unlike the errors in gyrocompasses, which have an oscillatory and random character and, thus, it is not possible to describe them accurately with mathematical relations. This issue was already perceived before WWII, when the Anschutz Company proposed, among other solutions, using the so-called Schuler period in the construction of gyrocompasses. Fibre optic gyrocompasses do not possess mechanical sensors, so the variability of their indications is of a different character. However, computational processes, as well as applied inertial sensors, also cause certain errors of an oscillatory nature. This raises the following questions: what is the spectrum of the error frequency of such compasses, and what is the influence of the ship’s movement on them? The authors attempted to evaluate this phenomenon by performing measurements made on board three hydrographic platforms and comparing them with the headings indicated by other compasses. Full article

(This article belongs to the Special Issue Advanced Fiber Optic Gyroscopes)

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Review

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17 pages, 2592 KiB

Open AccessReview

Application and Development of Fiber Optic Gyroscope Inertial Navigation System in Underground Space

by Hang Xu, Lu Wang, Yutong Zu, Wenchao Gou and Yuanbiao Hu

Sensors 2023, 23(12), 5627; https://doi.org/10.3390/s23125627 - 15 Jun 2023

Cited by 2 | Viewed by 2955

Abstract

Fiber Optic Gyroscope Inertial Navigation System (FOG-INS) is a navigation system using fiber optic gyroscopes and accelerometers, which can offer high-precision position, velocity, and attitude information for carriers. FOG-INS is widely used in aerospace, marine ships, and vehicle navigation. In recent years, it has also played an important role in underground space. For example, in the deep earth, FOG-INS can be used in directional well drilling, which can enhance recovery in resource exploitation. While, in shallow earth, FOG-INS is a high-precision positioning technique that can guide construction in trenchless underground pipelaying. This article extensively reviews the application status and latest progress of FOG-INS in underground space from three aspects—FOG inclinometer, FOG drilling tool attitude measurement while drilling (MWD) unit, and FOG pipe-jacking guidance system. First, measurement principles and product technologies are introduced. Second, the research hot spots are summarized. Finally, the key technical issues and future trends for development are put forward. The findings of this work are useful for further research in the field of FOG-INS in underground space, which not only provides new ideas and directions for scientific research, but also offers guidance for subsequent engineering applications. Full article

(This article belongs to the Special Issue Advanced Fiber Optic Gyroscopes)

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