公开(公告)号：US20200339171A1

公开(公告)日：2020-10-29

申请号：US16764901

申请日：2018-10-23

Applicant: HITACHI, LTD.

Inventor： Takayoshi NISHINO ,  Yuhi TSUTSUMI ,  Atsushi ODA ,  Kentaroh MAKI ,  Takenori WAJIMA ,  Kazuo TOKUYAMA

IPC: B61L25/02 ,  B60L3/00 ,  B61L3/00

Abstract: The present invention is provided with: a sensing unit which is provided in a vehicle and measures the three-dimensional shape of an object; a matching unit for performing matching between multiple sets of structure information, in which are associated a data group indicating the three-dimensional shapes of structures provided beforehand near a path the vehicle will travel along and positional information indicating the posit ions of the structures, and a data group indicating the three-dimensional shape of the object measured by the sensing unit, and for specifying the position of the object; and an estimated position determination unit for determining, with the position specified by the matching unit as a reference position, the estimated position of the vehicle on the basis of the reference position.

公开(公告)号：US20210001902A1

公开(公告)日：2021-01-07

申请号：US16977542

申请日：2019-01-28

Applicant: HITACHI, LTD.

Inventor： Yuhi TSUTSUMI ,  Atsushi ODA ,  Keiichi KATSUTA ,  Kazuo TOKUYAMA

IPC: B61L25/02 ,  G01S17/89

Abstract: A train position estimation device which calculates the position of a vehicle traveling on a predetermined path and comprises a surroundings shape measurement unit that is installed in the vehicle and measures the shape of the surroundings of the current location of the vehicle and a map storage unit for storing surroundings shape data at positions measured in advance, the train position estimation device being characterized by comprising a start position estimation unit for storing the probability of presence of the vehicle at each position; a map retrieval section determination device for outputting surroundings shape data for each position in descending order of presence probability; and a matching processing device that compares the surroundings shape data for the current location with the retrieved surroundings shape data and outputs the position for which the difference therebetween is equal to or less than a predetermined threshold value.