公开(公告)号：US10353050B2

公开(公告)日：2019-07-16

申请号：US14895460

申请日：2014-06-03

Applicant: DENSO CORPORATION

Inventor： Hiroto Nakatani ,  Koji Shimizu ,  Chiharu Yamano

IPC: G01S7/40 ,  G01S13/34 ,  G01S13/93

Abstract: A radar apparatus generates a spectrum distribution where frequencies in a beat signal are associated with intensities of respective frequency components. Based on a plurality of spectrum distributions generated over a predetermined number of measurement cycles prescribed in advance, the radar apparatus generates a reflection intensity distribution where frequencies are associated with road surface reflection intensities of the radar wave from a road surface at each frequency. In the reflection intensity distribution, the radar apparatus detects an intensity peak indicating a frequency that maximizes the road surface reflection intensity. Based on the detected intensity peak, the radar apparatus determines at least whether or not the radar apparatus is in an axis deviation state that is taken as a state where a reference axis of the radar apparatus has an inclination of not less than a prescribed angle in a vehicle height direction relative to a horizontal axis prescribed to a vehicle.

公开(公告)号：US20250028040A1

公开(公告)日：2025-01-23

申请号：US18908291

申请日：2024-10-07

Applicant: DENSO CORPORATION

Inventor： Ryosuke KANBAYASHI ,  Kazuhiro Nakashima ,  Chiharu Yamano ,  Hiromitsu Ohba

IPC: G01S13/76 ,  B60R25/24 ,  B60R25/31

Abstract: A position estimation system determines the location of a mobile device relative to a vehicle by wirelessly communicating with the device. The system includes multiple communicators installed at different positions in the vehicle, and a communication controller that manages these communicators. The communication controller collects signal reception strength and a time-of-flight related value from the mobile device. This time-of-flight value indicates the travel time of radio waves between the communicators and the mobile device. A position estimation unit corrects this time-of-flight value using a correction function based on teaching data that includes device positions, signal strengths, and time-of-flight values. The corrected time-of-flight value is used to estimate the mobile device's position. The data volume of the correction function is smaller than that of the teaching data.

公开(公告)号：US11119190B2

公开(公告)日：2021-09-14

申请号：US16335820

申请日：2017-09-25

Applicant: DENSO CORPORATION

Inventor： Mitsutoshi Morinaga ,  Takuya Takayama ,  Chiharu Yamano

IPC: G01S7/40 ,  G01S13/931

Abstract: An acquiring unit acquires, for each of reflection points detected by a radar device, reflection point information including a horizontal angle, a vertical angle, and a relative speed. A converting unit converts each of the reflection points into three-dimensional coordinates. An extracting unit extracts stationary reflection points from the reflection points. An estimating unit uses a relational expression established among unknown parameters including a traveling direction vector and a moving speed of a moving body, three-dimensional coordinates of each of the stationary reflection points, and a relative speed of the stationary reflection point, to estimate the known parameters. A calculating unit determines an axial misalignment angle from the estimated unknown parameters.