Research Of Key Technology Of Firewatcher For Forest Fire

Along with the rapid socio-economic and industrial development, the accelerated process of urbanization and population growth, rapid increase in large space buildings become the future development trend, the large space fire prevention issues following will also become focus. Especially in recent years, the fires prevention is paid more and more attention in our country, a past one by artificial to operate as main fact, low automatic intensity, backward means of monitoring and communication forest fire prevention mode has been already far unable to meet modern forest fire prevention need. Traditional fire survey technology is unable to solve the fire survey problem of large space such as forest, etc. effectively. The remote sensing technology used in some countries extensively can't be prevalent in small area of forest because of its high cost. So the fire survey technology based on images will have broad application prospect and use value as a new and effective survey technology.This paper analyzed the managing process of forest fire. It started with the links of prevention, rescue, disaster relief, rebuilding after forest fire etc., and divided the management of forest fire prevention into 4 cycle stages connecting each other: Relieve, prepare, respond and resume. To study the key to the forest fires prevention in each stage, construct different fire prevention model on this foundation and put forward one complete forest fire prevention system relatively.This paper investigated the fire detection technique based on thermal infrared imagery, and designed the infrared radar forest fire monitor method of passive form. It is possible to offer a method of monitoring the fire in little area early.The quick identification for fire is studied further in the paper. Firstly, the method of feedback adjusting CCD camera's exposure time is proposed according to image's characters of blaze of fire and the operation principle of CCD with average luminosities of local monitor, which can be enhanced fire image's definition. It can be realized quick clippings using the method of difference photography, and in which the background image is a reference in current camera angle. Secondly, the theory of crystal riming is introduced in image segmentation; the algorithm of image segmentation is proposed based on the principle of thermodynamics. The algorithm combined with prior knowledge of blaze of fire can be quickly and accurately to pick-up objective location. Thirdly, the determining algorithm about fire and project are proposed using integrative criterion that are acreage criterion and spire criterion. The acreage criterion can be used to preliminary determination forecast for fire alarm to enhance guard, in the foundation of forecast of fire, the spire criterion can be used for accurately identifying fire to determine whether being fire.It carried on deep research to the technology of fire tracking. Firstly described the general picture tracking theory frame, provided difficult point and countermeasure of flame tracking and realized the flame tracking effectively. On the foundation of tracking flame in suspected area, drew the dynamic characteristic array of flame, carry on dynamic characteristic analysis. To single characteristics amount such as the height, area, luminance, etc., change characteristic into binary value first, get rid of interference effectively, then carry on dispersed Fourier transform and analyzing spectral energy, form the quantization criterion. To the edge characteristic, investigate the greatest change of several frames close, carry on determining the nature and quantitative analysis to the characteristic of changing, form the edge characteristic criterion quantization result. Utilize the function of probability to upgrade and merge the characteristic on the basis that every characteristic criterion is quantized, realize the fire judge's probability.The video orientation based on GIS is investigated; also, the camera controlling system using SCM is devised. The object of the video orientation is discussed, the UML diagram for the orientation is designed, and combining the digital camera with landform and physiognomy, fire spot will be located accurately, at the same time, the located spot will be mapped to a place name qualitatively, the optimal succor path will be found, offering scientific reference evidence for the quick rescue of the fire. Receiving the controlling instructions from the main dominating machine by TCP/IP protocol, using PWM speed adjusting, adopting PID controlling algorithm, the close loop controlling upon the direct current motor in the camera is implemented, spreading the visual angle of the camera, reducing the expense of the system, ensuring the precise location of the camera angle of view.Taishan forest prevent fire system based on GIS is constructed according to the algorithms and practice demand applying microwave monitor technique. It is provided a powerful instrument for urgently finding fire location, quickly dispatching, and quickly perishing fire.