| 摘要 |
There is provided a smoke detecting system having self-monitoring function in which working status of a smoke detector, non-polarized wire cables and a signal receiving station are self-tested. The smoke detecting system comprises a smoke detector which detects the presence of a smoke accompanied with a fire, a signal receiving station which generates an alert signal, non-polarized wire cables which physically connect the smoke detector to the signal receiving station, and a detector circuitry which monitors the working status of the smoke detector, the signal receiving station and the non-polarized wire cables, wherein the detector circuitry is branched at a middle of one of the non-polarized wire cables. There is no change in the internal circuitry of the smoke detector. And, the working status of the smoke detecting system can be monitored by visual inspection.
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