The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2025
Filed:
Sep. 28, 2022
Crrc Qingdao Sifang Co., Ltd., Shandong, CN;
Xiankai Liu, Shandong, CN;
Donghua Wu, Shandong, CN;
Shanqiang Fu, Shandong, CN;
Shi Xiao, Shandong, CN;
Kaiyi Tang, Shandong, CN;
Zhiqiang Zhang, Shandong, CN;
CRRC QINGDAO SIFANG CO., LTD., Shandong, CN;
Abstract
A positioning system and method for a maglev train, the positioning system comprising an onboard magnet mounted at the bottom of a train, two grating arrays laid on train tracks side by side in the traveling direction of the train, an optical pulse generation module and a data processing module. The data processing module performs first-stage train positioning according to drift conditions of the center wavelengths of the marking gratings, performs second-stage train positioning according to drift conditions of the center wavelengths of the first grating array, and performs third-stage train positioning according to drift conditions of the central wavelengths of the second grating array, so as to determine the track positions where the train arrives step by step.