Infrared and Laser Engineering, Volume. 50, Issue 4, 20200239(2021)
Research on method of improving magnetic field adaptability of high-precision IFOG
Figures & Tables(10)
Fig. 3. Shielding equivalent circuit diagram of the geomagnetic field
Fig. 4. Relationship between the distance of the axial connection gap and the attenuation of the strength of internal magnetic field
Fig. 5. Diagrammatic cross-section of the fiber coils in three different states
Fig. 6. Bias (
Fig. 7. Bias of the IFOG in different temperatures.
Table 1. Magnetic field sensitivity of the fiber coil
View tableView in ArticleTable 1. Magnetic field sensitivity of the fiber coil
No. Magnetic field sensitivity of the fiber coil /(°)·h−1·Gs−1 - Fiber without de-twist Fiber with de-twist 1 16.235 2 1.810 6 2 11.383 9 1.052 3 3 13.802 5 1.528 4 Average 13.807 2 1.463 8
Table 2. Magnetic field sensitivities of the coil in different states
View tableView in ArticleTable 2. Magnetic field sensitivities of the coil in different states
Axial Magnetic field sensitivity of state 1 /(°)·h−1·Gs−1 Magnetic field sensitivity of state 2 /(°)·h−1·Gs−1 Shielding effectiveness of state 2 Magnetic field sensitivity of state 3 /(°)·h−1·Gs−1 Shielding effectiveness of state 3 Notes: The fiber coil in state 1 was un-shielding; The fiber coil in state 2 was shielded by permalloy material, but the connection gap was not welded; The fiber coil in state 3 is shielded by permalloy material, and the connection gap was welded by laser. X 1.052 3 0.026 5 31.98 0.000 40 68.40 Y 0.584 4 0.018 1 34.83 0.000 31 64.70 Z 0.395 4 0.008 0 33.88 0.000 23 64.71
Table 3. Bias stability of the IFOG in the temperature of −40−60 ℃
View tableView in ArticleTable 3. Bias stability of the IFOG in the temperature of −40−60 ℃
States Uncompensated bias stability Compensated bias stability Connection gap unwelded 0.041 0 (°)/h 0.003 18 (°)/h Connection gap welded 0.036 5 (°)/h 0.002 94 (°)/h Performance improvements 11.0% 7.5%
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Baoxiang Xu, Zhi Xiong, Jixun Huang, Haicheng Yu. Research on method of improving magnetic field adaptability of high-precision IFOG[J]. Infrared and Laser Engineering, 2021, 50(4): 20200239
Paper Information
Category: Photoelectric measurement
Received: Jun. 18, 2020
Accepted: --
Published Online: Jul. 30, 2021
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