Design and simulation analysis of a magnetic shielding box for ring laser gyroscope

Chui-yu Rong; Shao-min Hu; Xiang Han

doi:10.1117/12.2033520

19 September 2013 Design and simulation analysis of a magnetic shielding box for ring laser gyroscope

Chui-yu Rong, Shao-min Hu, Xiang Han

Proceedings Volume 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications; 890514 (2013) https://doi.org/10.1117/12.2033520
Event: ISPDI 2013 - Fifth International Symposium on Photoelectronic Detection and Imaging, 2013, Beijing, China

Abstract

Magnet outside is one of the main reasons that induce the bias shift of the Ring Laser Gyroscope (RLG), and the most effective way to handle it so far, is to employ a magnetic shielding device. In this paper, we design a new magnetic shielding box for RLG in Fe-Ni soft magnetic alloy. By 3-D modeling and simulation calculation in finite element method, we plot the distribution of magnetic flux density of the box in uniform magnet; Besides, distribution of magnetic shielding effectiveness (SE) on the gaining plane of RLG where is most sensitive to the change of magnet outside, is given out, too. We also discuss the factors that influence the distribution of SE such as permeability of shielding material, the thickness of the box and punching on the surfaces of the box. And by the SE test of the box samples, the result of the simulation analysis was finally proved true. The result shows that, the structure of the box decides the distribution of SE in it and the permeability of the material plays the predominant role in evaluating the average value of SE. Punching on the surfaces of the box makes the distribution of SE severely inhomogeneous, and with increase of the permeability, the influence will be more significant. At last, we put some practical steps forward to enlarge the average value of SE, and these measures are also applicable in other similar magnetic shielding devices.

Citation Download Citation

Chui-yu Rong, Shao-min Hu, and Xiang Han "Design and simulation analysis of a magnetic shielding box for ring laser gyroscope", Proc. SPIE 8905, International Symposium on Photoelectronic Detection and Imaging 2013: Laser Sensing and Imaging and Applications, 890514 (19 September 2013); https://doi.org/10.1117/12.2033520

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