Multi-Temporal Remote Sensing Technology And Dynamic Information Extract Of Debris Flow Along Railway Line

In the course to monitor the railway debris flow evolution process with remote sensing technique in southwest region of China, the keys are the ability to obtain the multi-temporal remote sensing information and the extract method of characteristic information of the debris flow dynamic state evolution from multi-temporal remote sensing. Comparing domestic and international relative research work and its result, research method and present condition, in the cloudy foggy southwest region the urgent problem to solve is : (1)studying the technology to obtain multi-temporal remote sensing image with bigger scale below cloud at low altitude, to complement existing aviation and aerospace remote sensing system technology each other; (2)researching the method to extract the characteristic information of the debris flow dynamic state evolution from multi-temporal remote sensing image.The remote sensing image with big scale is important essential data to research debris flow. The low altitude remote sensing technology for the sake of monitoring the railway debris flow and the similar engineering geology disaster and abrupt incidents , remedy the limitation of present aviation and aerospace remote sensing system to obtain multi-temporal remote sensing image with bigger scale. Using system engineering method, it analyze the system function, the Certain technique index include: (1) the low altitude remote sensing neans that the flying true height is at tens to hundreds meter; (2) The valid radius is not smaller than ten kilometer; (3) It can carry general photograph sensor and numerals imaging sensor, and it is able to record and transmit the video frequency picture. Comparing domestic and international low altitude remote sensing technique, its application and real examples completely, make optimization and combination follow indexes: system safety, rapid response, multi-purpose, performance cost ratio, modularization, etc. Choose unmanned remote control nonrigid airship as fly platform. During the process of system design, made use of reliability analysis...