Fiber-optic rotation sensing with low drift

1980 ◽  
Vol 5 (5) ◽  
pp. 173 ◽  
Author(s):  
R. Ulrich
Keyword(s):  
Fiber Optic ◽  
Rotation Sensing ◽  
Low Drift

scholarly journals Fiber-Optic Multipoint Sensor System with Low Drift for the Long-Term Monitoring of High-Temperature Distributions in Chemical Reactors

Sensors ◽  
2019 ◽  
Vol 19 (24) ◽  
pp. 5476 ◽  
Author(s):  
Franz J. Dutz ◽  
Andreas Heinrich ◽  
Rolf Bank ◽  
Alexander W. Koch ◽  
Johannes Roths
Keyword(s):  
Temperature Profile ◽  
Fiber Optic ◽  
Single Point ◽  
Industrial Applications ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Fast Time ◽  
Chemical Reactors ◽  
Optic Sensor ◽  
Low Drift

A low-drift fiber-optic sensor system, consisting of 24 regenerated fiber Bragg gratings (RFBG), equally distributed over a length of 2.3 m, is presented here. The sensor system can monitor spatially extended temperature profiles with a time resolution of 1 Hz at temperatures of up to 500 °C. The system is intended to be used in chemical reactors for both the control of the production ramp-up, where a fast time response is needed, as well as for production surveillance, where low sensor drifts over several years are required. The fiber-optic sensor system was installed in a pilot test reactor and was exposed to a constant temperature profile, with temperatures in the range of 150–500 °C for more than two years. During this period, the temperature profile was measured every three to five months and the fiber-optic temperature data were compared with data from a three-point thermocouple array and a calibrated single-point thermocouple. A very good agreement between all temperature measurements was found. The drift rates of the 24 RFBG sensor elements were determined by comparing the Bragg wavelengths at a precisely defined reference temperature near room temperature before and after the two-year deployment. They were found to be in the range of 0.0 K/a to 2.3 K/a, with an average value of 1.0 K/a. These low drift rates were achieved by a dedicated temperature treatment of the RFBGs during fabrication. Here, the demonstrated robustness, accuracy, and low drift characteristics show the potential of fiber-optic sensors for future industrial applications.

Low-noise fiber-optic rotation sensing

1981 ◽  
Vol 6 (2) ◽  
pp. 64 ◽  
Author(s):  
K. Böhm ◽  
R. Ulrich ◽  
P. Russer ◽  
E. Weidel
Keyword(s):  
Fiber Optic ◽  
Low Noise ◽  
Rotation Sensing

Low-drift fiber-optic gyro for earth-rate applications

1991 ◽  
Author(s):  
Richard B. Dyott ◽  
Yung Y. Huang ◽  
D. A. Jannush ◽  
Steve A. Morrison
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Gyro ◽  
Low Drift

Optical Compensation for Compressing Polarization Nonreciprocity Induced Errors in Interferometric Fiber-Optic Gyroscopes

2013 ◽  
Vol 303-306 ◽  
pp. 82-85 ◽  
Author(s):  
Zi Nan Wang ◽  
Yi Yang ◽  
Ping Lu ◽  
Yong Xiao Li ◽  
Chao Peng ◽  
...  
Keyword(s):  
Fiber Optic ◽  
New Approach ◽  
Simulation And Experiment ◽  
Low Drift ◽  
The Way

Optical compensation is studied for suppressing polarization nonreciprocity (PN) induced errors in interferometric fiber-optic gyroscopes (IFOG). In convention IFOGs, a polarizer is necessarily used, and only one polarization is used for interference in order to achieve low PN error. Differently, we propose a new approach for using two polarizations simultaneously in the IFOG. PN error can be effectively suppressing by optical compensation between the two detected signals. Both simulation and experiment are presented, which shows that PN errors are effectively reduced by optical compensation. This new approach paves the way for low drift IFOGs with no polarizer.

Passive fiber-optic ring resonator for rotation sensing

1983 ◽  
Vol 8 (12) ◽  
pp. 644 ◽  
Author(s):  
R. E. Meyer ◽  
S. Ezekiel ◽  
D. W. Stowe ◽  
V. J. Tekippe
Keyword(s):  
Ring Resonator ◽  
Fiber Optic ◽  
Rotation Sensing ◽  
Passive Fiber

Highly sensitive rotation sensing based on orthogonal fiber-optic structures

2011 ◽  
Author(s):  
Yi Yang ◽  
Zi-nan Wang ◽  
Lian-yu Xu ◽  
Cui-yun Wang ◽  
Lei Jia ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Rotation Sensing ◽  
Highly Sensitive

Ultra-low-drift, sub-microvolt low-frequency fiber optic voltage sensor

1994 ◽  
Author(s):  
Larry Fabiny ◽  
Sandeep T. Vohra ◽  
Frank Bucholtz
Keyword(s):  
Fiber Optic ◽  
Low Frequency ◽  
Voltage Sensor ◽  
Low Drift
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