| 摘要 |
The invention concerns a method, and relevant device, for remote sensing objects, characterised in that said objects are in a condition of thermal emission that is variable during time, and in that it comprises the following phases: A. acquisition of a map of the radiation coming from the surface of the portion of space within or behind which the object to be sensed is supposed to be, at least at a first time t1 and a second time t2, such times being successive to each other; B. acquisition of map of the radiation coming from the surface of said portion of space, considered at a third instant t* different from said at least two times t1 and t2 ; C. summation of he maps of said at least two times t1 and t2 as obtained from the phase A; D. subtraction of the map at said time t* as resulting from the phase B, from the sum as resulting from the phase C, E. comparison between the values of each portion of map area as resulting from the phase D and a threshold value of the radiation intensity for the material of the sought objects; F. identification of the material of the object under investigation with the sought material, when the result of the comparison of the phase E has provided the presence of at least a certain number n of area portions of said space portion, with n >= 1, whose value for said radiation is larger than said threshold value.
|
