Traffic event recording method and apparatus
US5717391A · kind A · utility
53Cited by
5References
7Claims
0Family size
Inventor
Key dates
| Filing date | Feb 13, 1997 |
| Grant date | Feb 10, 1998 |
| Priority date | — |
| Expiry date | Feb 13, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08G1/0104
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for determining the condition of a traffic controlling semaphore has an audio sensor mounted in the vicinity of an intersection so the sound level is monitored at all times. A computer is placed into the semaphore controller, and the computer receives the audio signal, a time signal, and a signal representing the status of the semaphore. When a sound is detected above a certain minimum level, which is above the usual traffic noise, a record is generated by the computer, and recorded in permanent form, perhaps printed on paper. The record includes the date, time, and status of the semaphore.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.