Supervisory camera system
US5874990A · kind A · utility
36Cited by
7References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Mar 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/1963
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A supervisory system in which a plurality of supervisory points (1) to (N) are monitored one after another by a monitor camera. The supervisory points are switched at random based on random numbers. A period of monitoring each supervisory point is set at random based on the random numbers. When random monitoring is carried out, it is controlled in order not to select the same supervisory point in succession.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.