Road surface water depth calculation device

Patent metadata

Field	Value
Publication number	US-2021018317-A1
Application number	US-202016841729-A
Country	US
Kind code	A1
Filing date	Apr 7, 2020
Priority date	Jul 19, 2019
Publication date	Jan 21, 2021
Grant date	—

Abstract

A road surface water depth calculation device includes: an acquisition unit configured to acquire flooding locations at which a vehicle travels and water depth candidates of the flooding locations; an extraction unit configured to extract a plurality of continuous flooding locations from the acquired flooding locations; an altitude acquisition unit configured to acquire altitudes of the extracted flooding locations; an estimation unit configured to calculate a sum of the water depth candidate and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations, and estimate the sum as a water surface altitude which is an altitude of a water surface of each of the extracted flooding locations; and a calculation unit configured to calculate a water depth of the extracted flooding location based on the water surface altitude and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations.

First claim

What is claimed is:

1 . A road surface water depth calculation device, comprising:
an acquisition unit configured to acquire flooding locations at which a vehicle travels and water depth candidates of the flooding locations; an extraction unit configured to extract a plurality of continuous flooding locations from the acquired flooding locations; an altitude acquisition unit configured to acquire altitudes of the extracted flooding locations; an estimation unit configured to calculate a sum of the water depth candidate and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations, and estimate the sum as a water surface altitude which is an altitude of a water surface of each of the extracted flooding locations; and a calculation unit configured to calculate a water depth of the extracted flooding location based on the water surface altitude and the altitude, acquired by the altitude acquisition unit, of each of the extracted flooding locations.

2 . The road surface water depth calculation device according to claim 1 , wherein
the calculation unit is configured to calculate, as the water depth of the flooding location, a value which is obtained by subtracting the altitude acquired by the altitude acquisition unit from an average of the plurality of the water surface altitudes, a mode value among the plurality of the water surface altitudes, or a median value of the plurality of water surface altitudes.

3 . The road surface water depth calculation device according to claim 1 , wherein
the calculation unit further calculates a maximum water depth among a flooding region including the extracted respective flooding locations and a flooding location thereof, based on a calculation result of the water depth of the flooding location and terrain of the flooding location.

Assignees

• Aisin Seiki

Inventors

• Noma Hiroshi
• Mori Yuhei
• Niwa Eiji

Classifications

• B60W2556/45

  External transmission of data to or from the vehicle · CPC title

• G01C21/3841

  Data obtained from two or more sources, e.g. probe vehicles · CPC title

• G01C21/3822

  Road feature data, e.g. slope data · CPC title

• H04W4/44

  for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H] · CPC title

• B60W40/06 Primary

  Road conditions · CPC title