Processor architecture for traffic sensor and method for obtaining and processing traffic data using same
US7768427B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 5, 2005 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Jun 3, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/015
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Vehicular traffic data is obtained using a traffic sensor having an antenna/transceiver module, a DSP and a microcomputer. This involves (a) transmitting radiation at a vehicles on a roadway; (b) receiving the radiation reflected back from the vehicles; (c) producing a stream of electrical signals based on the radiation reflected back from the vehicles; (d) processing the stream of electrical signals using the DSP to determine if a vehicle detection threshold is met, and, if the vehicle detection threshold is met, to determine an initial vehicle position; (e) when the vehicle detection threshold is met, generating a first signal representing the initial vehicle position using the DSP; (f) transmitting the first signal to the microcomputer; (g) deriving a first traffic information signal from the first signal using the microcomputer; (h) transmitting the first traffic information signal to an external traffic management system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.