METHOD FOR GRAVIMETRIC MEASUREMENTS AND STRING GRAVIMETER Russian patent published in 2008 - IPC G01V7/02 

FIELD: physics; measurement.

SUBSTANCE: inventions of group are related to instrument making and may be used for creation of gravimeters. Substance of method for gravimetric measurements consists in measurement of gravity acceleration by change of inertial body suspension oscillation frequency in the field of gravitation. Specific feature of method - in case of vibrational agitations that exceed microvibrations that accompany process of gravity acceleration measurement, mass of inertial body is reduced by value that satisfies the condition of mathematical expression given in description, and in case vibrational agitations disappear, mass of inertial body is increased by value specified in description. Method is realised with string gravimeter that contains string bound with its top end to casing and with its bottom end - to weight, flat springs, electronic circuit for excitation and removal of string oscillations. Weight is arranged in the form of rod and piston that embraces it. Support is provided in casing, installed with clearance in respect to piston. Support may be arranged in the form of cantilever on the bottom side of piston bottom with plate on free end and cuvette with liquid fixed to casing, and plate is parallel to plane of springs and is installed in liquid with gaps in respect to cuvette and casing walls. Owing to this, accuracy of gravimetric measurements may be increased, as well as reliability of string gravimeter during its operation under condition of vibrational agitations.

EFFECT: higher accuracy of gravimetric measurements and reliability of string gravimeter during its operation under conditions of vibrational agitations.

3 cl, 2 dwg