Compact single lens laser system for object/vehicle presence and speed determination
US7323987B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2005 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Jan 14, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/052
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A compact system for determining the presence and speed of an object/vehicle, and its application for Red Light Camera photo-enforcement is disclosed. The disclosed system uses accurate timing, laser radiation in the form of optical pulses, and the scattering effect of optical pulses from the road or vehicle surface to determine the presence of a vehicle, and estimate its speed. The system can determine whether an object/vehicle is present at a specific location, estimate its height, and in the case that the object/vehicle is moving, the system can estimate its speed. Combining the disclosed technology with commercially available digital recording techniques and equipment, a traffic photo-enforcement system can be constructed. The system is capable of monitoring traffic in an intersection/highway, measure vehicle speed, identify potential traffic violations, and trigger a visual recording device such as a camera or video system for documenting a violation. The system can serve as a tool by law enforcement agencies and research groups for other applications, such as measurement of traffic density, monitor vehicle speed, and the study of traffic patterns. Other important information …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.