FACILITY TO DETECT AND IDENTIFY PLASTIC MINES Russian patent published in 2003 - IPC

FIELD: electromagnetic equipment of passive detection of foreign formations hidden in ground, namely mines, searching for plastic mines with simultaneous identification of type of explosive with which mines are fitted. SUBSTANCE: technical result of invention consists in expanded functional capabilities of facility thanks to realization of potential for search and detection of plastic mines not carrying metal parts, in reliable identification of type of explosive with which mines are fitted, in enhanced noise immunity of facility, in diminished dependence of its operational stability of ambient and weather conditions ( type and density of ground, its degree of anisotropy, humidity of air and ground, temperature and so on ), in rise of its operational characteristics, in maximum reduction of its mass, dimensions and energy indices, in raised resolution with potential for detection of small-sized objects ( any types of mines ) with simultaneous increase of maximum possible depth of search. Received noise signal of charge of antenna capacitance is converted to voltage of charge amplifier and goes to input of phase spectrum analyzer across which outputs signals proportional to values of phase shift of frequency components of frequency spectrum in range 1.0-10.0 kHz of input signal are observed. These signals are subtracted from calibration signals generated before start of movement of facility above initial point of ground containing no mines and stored in unit of analog storage. Difference signal is fed into comparators, only comparators which input signal exceeds operational threshold are activated. Signals of units from outputs of activated comparators go to inputs of decoder which convert code of numbers of inputs to which signal of units were fed to signal across this or that input of decoder. This results in ignition of proper light-emitting diode which corresponds to determination of this or that type of explosive charge. EFFECT: expanded functional capabilities of facility. 10 cl, 6 dwg