Road information detection apparatus and road information detection method
US10551494B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 2017 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Jul 9, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/166
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A road information detector acquires road information by emitting a beam via a variable directivity transmission antenna to a road sign having plural flat portions and includes a transceiver that controls the antenna to scan the beam by switching an emission angle including an azimuth angle relative to the front direction of a vehicle and receives, as reflected wave signals, waves reflected by the flat portions, a distance and reflected wave intensity detector that detects a distance between the vehicle and each of the flat portions and a reflected wave intensity of each of the reflected waves, an emission angle detector that detects the emission angle based on the reflected wave signal, and a road information analyzer that acquires the road information by generating a heat map based on the emission angles, distances, and reflected wave intensities and analyzing the heat map using a threshold value of the wave intensity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.