Traffic sensor and method for providing a stabilized signal
US7474259B2 · kind B2 · utility
7Cited by
23References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 13, 2005 |
| Grant date | Jan 6, 2009 |
| Priority date | — |
| Expiry date | Feb 2, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03L7/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A traffic sensor is mounted at a fixed location to monitor multiple lanes of traffic. The traffic sensor (a) generates a programmable time-varying modulating signal; (b) generates a modulated microwave signal based on the programmable time-varying modulating signal; (c) radiates the modulated microwave signal in a radiation beam at an object; (d) provides a proportional calibration signal based on the modulated microwave signal; (e) measures parameters of the calibration signal, and (f) corrects the programmable time-varying modulating signal based on the parameters of the calibration signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.