The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 2019
Filed:
Apr. 25, 2014
Optasense Holdings Limited, Farnborough, Hampshire, GB;
Roger Crickmore, Farnborough, GB;
David Hill, Farnborough, GB;
Jon Richards, Farnborough, GB;
Richard Martin, Farnborough, GB;
Magnus McEwen-King, Farnborough, GB;
OPTOSENSE HOLDINGS LIMITED, , GB;
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 () are deployed on, or formed in, the surface of a road (). The noise feature () is arranged to generate a characteristic acoustic signature when traversed by the wheels of a vehicle () travelling within a lane of the road. A distributed acoustic sensor () is deployed to detect occurrences of the characteristic acoustic signature. In some embodiments the noise element may comprise at least two distinct elements (), 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.