RU94045637A - Knolin quasioptimal method for obtaining image of dynamic object and determination of its orientation - Google Patents

Abstract

FIELD: radio-, laser- and hydraulic detection and ranging of objects. SUBSTANCE: Knolin quasioptimal method for obtaining image of dynamic object and determination of its orientation consists in detection of field dissipated by the object in two points, measurement of velocity vectorof shift of amplitude-phase distribution of field, location of detection points along vector, formation at each detection point of complex distance-doppler image of object, but in point located along vector, with some delay for τ= a/v, where a is distance between the points; calculation of mutual correlation of complex envelops in corresponding members of resolution of two images; calculation of the sizes of resolution members in range and frequency in length units to obtain unknown equal-scale image by placing the found values of correlation factors in compliance with each member of resolution; orientation of the image plane so that direction of frequency axis is straight-opposite to vector, and orientation of the object is determined by obtained oriented image. EFFECT: extended range of technical facilities for obtaining the image of remote objects, higher signal/noise ratio, provision of obtaining equal-scale image and orientation of the object. 1 cl

Claims (1)

Choline's quasi-optimal method of acquiring an image of a dynamic object and determining its orientation relates to radio, laser, and sonar, and consists in the fact that with the aim of expanding the arsenal of technical means for obtaining images of distant objects, as well as increasing the signal-to-noise ratio, obtaining a uniform image, and determining the orientation object, carry out the reception of the field scattered by the object at two points, measure the displacement velocity vector of the amplitude-phase field distribution, place the receiving points in along it, at each point a complex range-Doppler image of the object is formed, the cross-correlation of the complex envelopes in the corresponding resolution elements of the two images is calculated, the sizes of the resolution elements in range and frequency in units of length are calculated, the desired uniform image is obtained, matching each resolution element found the values of the correlation coefficients orient the image plane so that the direction of the frequency axis is directly opposite to the velocity vector I amplitude-phase distribution of the field, after which the resulting image to orient judge the orientation of the object.