Rotating source verification device
US5083109A · kind A · utility
Inventors
Key dates
| Filing date | Jul 5, 1990 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Jul 5, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/10
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A device for monitoring and verifying the operation of a rotating source, such as a rotating civil defense-type siren being tested by sounding the siren for a short period of time, employs a sensor mounted near the siren. The signal from the sensor is amplified, filtered and converted to a sinusoidal signal of the same frequency as the rotation of the siren. The sinusoidal signal is processed to sense siren turn-on, to determine whether the siren rotates more than a predetermined minimum number of times, and to sense siren turn-off. This information is stored and displayed by the device until it can be inspected by an individual, and can be relayed to a remote site.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.