Traffic monitoring
US10198946B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2014 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Apr 25, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/015
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The present application relates to road traffic monitoring to detect the number, speed and/or type of vehicles travelling on a road. Noise features (104) are deployed on, or formed in, the surface of a road (101). The noise feature (104) is arranged to generate a characteristic acoustic signature when traversed by the wheels of a vehicle (105) travelling within a lane of the road. A distributed acoustic sensor (102, 103) is deployed to detect occurrences of the characteristic acoustic signature. In some embodiments the noise element may comprise at least two distinct elements (104a, 104b), for instance rumble strips arranged transversely to the road, which are a known distance apart along the road. The acoustic signals from a wheel crossing both elements can be detected and used to determine the vehicle speed. The number of vehicle axles and axle separation can also be determined to categorize the type of vehicle. A plurality of noise features may be located in different lanes of a multi-lane road with noise features in different lanes arranged to generate different characteristic acoustic signatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.