公开(公告)号：US20240203185A1

公开(公告)日：2024-06-20

申请号：US18541408

申请日：2023-12-15

Applicant: ALPS ALPINE CO., LTD.

Inventor： Taiki IGARASHI ,  Daisuke TAKAI

IPC: G07C9/28 ,  G01S5/02 ,  G07C9/22

CPC classification number: G07C9/28 ,  G01S5/0295 ,  G07C9/22 ,  G07C2209/08

Abstract: A positioning system includes: a transmitting and receiving part having multiple antennas and positioned overhead in a positioning target area with a side entrance; a distance calculation part configured to calculate a distance between a communication device that can move in the positioning target area, and the transmitting and receiving part, based on results gained from signals of multiple frequencies transmitted bidirectionally between the communication device and the transmitting and receiving part; an angle calculation part configured to calculate an angle that indicates a position of the communication device with respect to the transmitting and receiving part, based on a phase difference between the signals received by the antennas of the transmitting and receiving part; and a determining part configured to determine whether or not the communication device is approaching the side entrance based on the distance and angle calculated by the distance calculation part and the angle calculation part.

公开(公告)号：US20240133990A1

公开(公告)日：2024-04-25

申请号：US18484757

申请日：2023-10-10

Applicant: ALPS ALPINE CO., LTD.

Inventor： Taiki IGARASHI ,  Daisuke TAKAI

IPC: G01S3/46 ,  G05D1/04

CPC classification number: G01S3/46 ,  G05D1/042

Abstract: A positioning system includes an elevation angle calculator that determines, as a second elevation angle, an inverse cosine of a first value, upon occurrence of a condition in which an absolute value of a first elevation angle is greater than or equal to a second predetermined angle, the second predetermined angle being greater than a first predetermined angle, the first value being obtained by dividing a second value that is obtained by correcting, with a correction value, an altitude measured by an altitude measurement unit, by a distance measured by a distance measurement unit. The elevation angle calculator selects any one of the first elevation angle and the second elevation angle, based on a value of the first elevation angle.

公开(公告)号：US20240230818A9

公开(公告)日：2024-07-11

申请号：US18484757

申请日：2023-10-11

Applicant: ALPS ALPINE CO., LTD.

Inventor： Taiki IGARASHI ,  Daisuke TAKAI

IPC: G01S3/46 ,  G05D1/04

CPC classification number: G01S3/46 ,  G05D1/042

Abstract: A positioning system includes an elevation angle calculator that determines, as a second elevation angle, an inverse cosine of a first value, upon occurrence of a condition in which an absolute value of a first elevation angle is greater than or equal to a second predetermined angle, the second predetermined angle being greater than a first predetermined angle, the first value being obtained by dividing a second value that is obtained by correcting, with a correction value, an altitude measured by an altitude measurement unit, by a distance measured by a distance measurement unit. The elevation angle calculator selects any one of the first elevation angle and the second elevation angle, based on a value of the first elevation angle.

公开(公告)号：US20230072262A1

公开(公告)日：2023-03-09

申请号：US17818494

申请日：2022-08-09

Applicant: ALPS ALPINE CO., LTD.

Inventor： Taiki IGARASHI ,  Mitsunobu INOUE ,  Naoya SHIMADA ,  Daisuke TAKAI

IPC: G01S13/42 ,  G01S7/40

Abstract: An angle measuring device includes an antenna device having antenna elements equally spaced along a first axis and a second axis, respectively, a selecting unit that selects phase differences with which a variance thereof becomes a predetermined value or less, from a plurality of phase differences of signals received from a transmission device by the antenna elements, an azimuth angle computing unit that computes an azimuth angle of the transmission device from a ratio of a first phase difference between signals received by two antenna elements spaced by a predetermined distance along the first axis and a second phase difference between signals received by two antenna elements space by the predetermined distance along the second axis, and an elevation angle computing unit that computes an elevation angle of the transmission device, based on the computed azimuth angle and the first or second phase difference.