Test apparatus and method for security system
US5164702A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1990 |
| Grant date | Nov 17, 1992 |
| Priority date | — |
| Expiry date | Dec 24, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/014
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A security system provides for bidirectional communication between a controller and a plurality of addressable transponders. At least one transponder includes a sensor circuit for detecting motion, which motion is indicated by the transponder signalling back to the controller. During a walk test the controller sends a signal back to the transponder, completing the circuit for the visible output indicator so that subsequent motions during the walk test sequence will be immediately displayed at the transponder, without necessitating successive communication through the loop including the controller. In systems where the controller itself reports upwardly in a hierarchy of units, the walk test can confirm operability of the entire system, including other condition-indicating signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.