METHOD FOR EXCITATION OF VIBRATION OSCILLATIONS FOR PERFORMANCE OF SEISMIC SURVEY AND UNBALANCE VIBRATION EXCITER FOR ITS REALISATION Russian patent published in 2010 - IPC B06B1/16 

FIELD: mining.

SUBSTANCE: group of inventions may be used to perform seismic works with vibration source of elastic oscillations excitation with application of electromechanical unbalance vibration exciters. In method of vibration oscillations excitation to perform seismic survey, according to invention, excitation of elastic oscillations in specified n-octave seismic range of elastic waves is carried out octave by octave with the help of n unbalance vibration exciters, every of which operates in one of specified octaves of specified seismic range of elastic waves, at the same time own resonant frequency of each of n systems "vibration source - ground" in process of elastic oscillations energy transfer is in the area of higher frequency of octave in according unbalance vibration exciter. Unbalance vibration exciter, according to invention, comprises shaft, on which unbalance is installed, made of two unbalance weights, which are installed with the possibility of their angular position adjustment relative to each other with the help of tracking system, including position sensors installed on unbalance weights and connected to inlets of control unit. One of mentioned unbalance weights installed on shaft with the possibility of free rotation is arranged with slots located along half-disk generatrix and is connected to the end of spring, another end of which is fixed on specified shaft. At the same time another unbalance weight, which is rigidly fixed on specified shaft, is equipped with at least one movable cog installed with the possibility of engagement to specified slots in the first unbalance weight and connected to outlet of control unit.

EFFECT: provision of permanent force that affects ground in range of frequencies that is wider than in available technical solutions on the basis of development of frequency range in excited elastic waves octave by octave, applying a separate vibration exciter for each of them, creation of unbalance vibration exciter design with the possibility of efficient control of action force developed by it at investigated medium in process of rotation frequency variation.

7 cl, 4 dwg