US 11,654,945 B2
Safe and reliable method, device, and system for real-time speed measurement and continuous positioning
Gaohua Chen, Hunan (CN); Jianghua Feng, Hunan (CN); Shu Cheng, Hunan (CN); Rongjun Ding, Hunan (CN); Chaoqun Xiang, Hunan (CN); Yijing Xu, Hunan (CN); and Liang Han, Hunan (CN)
Assigned to CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO., LTD., Hunan (CN)
Appl. No. 16/488,162
Filed by CRRC ZHUZHOU ELECTRIC LOCOMOTIVE RESEARCH INSTITUTE CO., LTD., Hunan (CN)
PCT Filed Mar. 16, 2017, PCT No. PCT/CN2017/076926
§ 371(c)(1), (2) Date Aug. 22, 2019,
PCT Pub. No. WO2018/152899, PCT Pub. Date Aug. 30, 2018.
Claims priority of application No. 201710096583.6 (CN), filed on Feb. 22, 2017.
Prior Publication US 2021/0129880 A1, May 6, 2021
Int. Cl. B61L 25/02 (2006.01); B60L 13/06 (2006.01); G01C 21/16 (2006.01)
CPC B61L 25/021 (2013.01) [B60L 13/06 (2013.01); B61L 25/025 (2013.01); G01C 21/165 (2013.01); B61L 2205/04 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method for safely and reliably performing real-time speed measurement and continuous positioning, comprising:
detecting inertial navigation data from an inertial navigation signal source arranged in a train, and detecting correction data from a correction signal source, wherein the correction signal source comprises a satellite signal source arranged in the train, and the correction data comprises satellite data; and
determining, in a case that no correction data is detected, a current speed and a current position of the train based on the inertial navigation data, and correcting, in a case that the correction data is detected, the inertial navigation data by using the correction data and determining a current speed and a current position of the train based on the corrected inertial navigation data,
wherein the correction data further comprises: speed data from a stator pole signal source arranged on a rail for the train; and/or position data from an induction encoder arranged on the rail for the train, and wherein
in the case that no satellite data is detected, the correcting the inertial navigation data by using the correction data comprises:
correcting speed data in the inertial navigation data by using the speed data from the stator pole signal source; and/or correcting position data in the inertial navigation data by using the position data from the induction encoder, and
in the case that the satellite data is detected, the correcting the inertial navigation data by using the correction data comprises:
correcting speed data in the inertial navigation data by using the speed data from the stator pole signal source and the satellite data; and/or correcting position data in the inertial navigation data by using the position data from the induction encoder and the satellite data.