Method and apparatus for detecting vehicle wheels
US8884812B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2012 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Jan 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/0116
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method for detecting wheels of a vehicle that is traveling on a roadway in a travel direction and the wheels of which are at least partially exposed laterally. The method including: emitting an electromagnetic measurement beam lobe with a known temporal progression of frequency from the side of the roadway onto an area of the roadway and at a slant with respect to the travel direction, receiving the measurement beam lobe reflected by a passing vehicle and recording the temporal progression, relative to the known progression, of all of its frequencies, and during the passage of a vehicle, detecting a frequency spread appearing in the recorded progression and exceeding a predetermined spread magnitude, as a wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.