Method and apparatus for detecting vehicle wheels
US8937571B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2012 |
| Grant date | Jan 20, 2015 |
| Priority date | — |
| Expiry date | Aug 7, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/50
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for detecting the wheels of a vehicle that is traveling on a roadway in a travel direction and whose wheels project downward from the vehicle body and are at least partially exposed laterally at the level of the vehicle body, with the steps: emitting a concentrated electromagnetic measurement beam with a known temporal progression of frequency from the side of the roadway onto an area a predetermined distance above the roadway and at a slant with respect to the travel direction, receiving the measurement beam reflected by a passing vehicle and recording the temporal progression, relative to the known progression, of its frequency, and detecting a rectangular pulse occurring in the recorded progression within the time period when the vehicle body passes, as a wheel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.