Affiliation:
1. School of Geology Engineering and Geomatics, Chang’an University, 126 Yanta Road, Xi’an 710054, China
2. School of Natural Resources and Surveying, Nanning Normal University, 175 Mingxiu East Road, Nanning 530001, China
Abstract
The signal measured by the maglev gyro sensor is sensitive to the influence of the instantaneous disturbance torque caused by the instantaneous strong wind or the ground vibration, which reduced the north-seeking accuracy of the instrument. To address this issue, we proposed a novel method combining the heuristic segmentation algorithm (HSA) and the two-sample Kolmogorov-Smirnov (KS) test (named HSA-KS method) to process the gyro signals and improve the north-seeking accuracy of the gyro. There were two key steps in the HSA-KS method: (i) all the potential change points were automatically and accurately detected by HSA, and (ii) the jumps in the signal caused by the instantaneous disturbance torque were quickly located and eliminated by the two-sample KS test. The effectiveness of our method was verified through a field experiment on a high-precision global positioning system (GPS) baseline at the 5th sub-tunnel of the Qinling water conveyance tunnel of the Hanjiang-to-Weihe River Diversion Project in Shaanxi Province, China. Our results from the autocorrelograms indicated that the jumps in the gyro signals can be automatically and accurately eliminated by the HSA-KS method. After processing, the absolute difference between the gyro and high-precision GPS north azimuths was enhanced by 53.5%, which was superior to the optimized wavelet transform and the optimized Hilbert-Huang transform.
Funder
National Natural Science Foundation of China
Natural Science Basic Research Program of Shaanxi
Fundamental Research Funds for the Central Universities, CHD
Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University
Guangxi Young and Middle-aged Teachers’ Basic Scientific Research Ability Improvement Project
Natural Science Foundation of Guangxi
Subject
Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry
Reference40 articles.
1. The Six Methods of Finding North Using a Suspended Gyroscope;Thomas;Surv. Rev. Dir.,1982
2. Yang, Z., Shi, Z., and Yang, J. (2017). North Seeking Principle and Measurement Application of Magnetically Suspended Gyroscope, Surveying and Mapping Press.
3. Filatov, Y.V., Pavlov, P.A., Velikoseltsev, A.A., and Schreiber, K.U. (2020). Precision Angle Measurement Systems on the Basis of Ring Laser Gyro. Sensors, 20.
4. Integrated Geographical Latitude Measurement and North-Seeking Technology and Method of Maglev Gyro Total Station in Confined Space of Mining;Yang;Insights Min. Sci. Technol.,2022
5. Azimuth information processing optimization method for a magnetically suspended gyroscope;Shi;J. Intell. Fuzzy Syst.,2018