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The response signal trends of ordinary ionization and photoelectric detectors under high altitude area were predicted using a simple model. The analysis results showed that the response trend varied with the pressure at 2nd power law for ionization detector, and 4th power law for photoelectric detector, which indicates that the signal performance of point-type smoke detector decreased with increasing...
Smoke is emitted from biomass burning every year. It affects regional air quality and long-term climate and is an important factor for fire detection of remote Sensing. An improved smoke plume detection method based on Kmeans clustering and multi-spectral threshold analysis is described in this paper. The threshold method has been developed with moderate-resolution imaging spectroradiometer (MODIS)...
A technique for characterization of smoke particles is described. The technique was established through measurements using a polarization modulated angular scanning scatterometer to completely characterize the intensity and polarization of the scattered light. The physical and optical properties of the particles were extracted from the measured data by combining light scattering modeling. Preliminary...
Burn scar identification is usually made in order to appraise injury degree of the forest after obtaining the fire spots. The most effective remote sensing methods for burn scar identification rely upon analysis of two MODIS near-infrared (NIR) channels centered near 1.24 and 2.13 um data. Due to burned-unburned separability and apparent reflectance of the two channels, the Global Environment Monitoring...
This paper presents a new smoke concentration measurement system, which is designed based on the theory of light extinction. To implement the technique we developed, the hardware system, including a reflecting light path, balanced circuit design, and reasonable data acquisition and processing system, is constructed. In particular, a set of photodiode and preamplifier is specially applied and adjusted...
The system uses nRF2401 for short-range wireless communications, GPRS for long-distance wireless communications, ARM9 for center console, Wireless Multi-sensor Fire Detector for node, and BP algorithm is used for judging the probability of fire. Wireless Multi-sensor Fire Detector is formed of the low-power electrochemical carbon monoxide sensor, photoelectric smoke detector and semiconductor temperature...
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