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How long should a hard wired smoke detector last? 

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In the case of medium and slow fires, smoke detector sensitivity plays a more important role in detection times than with ultra-fast and fast fires.
They can be installed by a homeowner just as they would a normal smoke detector.
These characteristics of smoke detector usage and acquisition should be considered in targeting future intervention strategies.
The exclusive use of the time domain analysis in the design tuning to lower the probability of false alarms is caused by the output signal binary nature prevailing in the optical smoke detector designs.
Proceedings ArticleDOI
Yuan Wei, Yu Chunyu, Zhang Yongming 
02 Oct 2009
20 Citations
So we can judge the smoke or non-smoke by monitoring the power of the edge area.
This paper presents an improved novel dynamic smoke detecting method for automatic forest fire surveillance with long- distance video.
Reasonable interpretation of these estimates, combined with the cost of a smoke detector and the risk of a fire death, places the smoke detector-based value of life saving in a range of $ 1.41 to $ 2.487 million 1986 dollars.
Determination of the presence of an operational smoke detector in 1- and 2-family dwellings may be a useful injury prevention act during such EMS calls.
The SDAA was found to be very accurate in determining detector activation times for both high- and low-velocity smoke flows.
A design provided in this paper, which is based on embedded system, can be used to measure the response time of smoke detector accurately.
It is shown that such a smoke detector is able to operate reliably under low concentration of smoke and high relative humidity conditions.
Efforts to increase protection with smoke alarms should be augmented with programs to insure adequate and timely testing and maintenance of existing smoke alarms.
The results of these experiments show that the smoke detectors, especially the ionization detector, are sensitive to cooking fumes and nuisance alarms are easy to happen.
Alarm algorithms utilizing ionization detector smoke measurements proved to be more effective than measurements from photoelectric detectors.
It was proved that the proposed method is able to reliably detect the long-distance wildfire smoke and simultaneously produce very few false alarms in actual applications.
Experimental results on different video frames show that the proposed smoke detection system has robust performance on detecting the existence of smoke which shows the effectiveness of the proposed smoke detection system.
By conducting tests with live smoke, we show that both FallTime and DriftTestButton perform more effectively than existing fault tolerance techniques and stand to substantially reduce the risk that a smoke detector fails to alarm in the presence of smoke.