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1. (WO2018121361) SMART VEHICLE BACKTRACKING METHOD

Pub. No.:    WO/2018/121361    International Application No.:    PCT/CN2017/117276
Publication Date: Fri Jul 06 01:59:59 CEST 2018 International Filing Date: Wed Dec 20 00:59:59 CET 2017
IPC: G08G 1/14
G01S 11/06
Applicants: NIO CO., LTD.
上海蔚来汽车有限公司
Inventors: LAI, Jianwen
赖建文
Title: SMART VEHICLE BACKTRACKING METHOD
Abstract:
A smart vehicle backtracking method comprises: broadcasting, by a radio signal broadcast apparatus arranged at a vehicle to be found, and at a fixed time interval, a broadcast frame; upon a vehicle tracking device receiving the broadcast frame, correcting, according to accelerations of a gyroscope along x, y, and z axes, a received signal strength indicator (RSSI) of the broadcast frame, and performing three-point smoothing; in order to reduce fluctuation of RSSI, performing, repeatedly and according to the accelerations of the gyroscope, operations of the acceleration correction and three-point smoothing processes; and computing, according the corrected received signal strength indicator RSSInew, a distance between the vehicle tracking device and the vehicle to be found. As a result, the smart reverse vehicle tracking method is employed to increase precision of vehicle positioning.