PRESSURE CELL FOR MEASURING VOLTAGES IN SOILS Russian patent published in 2018 - IPC E02D1/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment, is intended for measuring stress in soils under dynamic loads, in particular during soil compaction, blasting, earthquake, and can be used in construction, mining, experimental research. Load cell for measuring stress in the soil consists of a body, a protective cover located on top of the body, airspace, hydraulic fluid, working cover, ring gasket, while the working cover is made in the form of a straight thick-walled circular cylindrical glass, the bottom of which is made in the form of an elastic membrane. Body is annular and made of an electrically insulating material, protective cover is made in the form of a straight thick-walled circular cylindrical cup, the bottom of which is made in the form of a rigid membrane, protective cover is located on top of the annular body, and working cover is located at the bottom of the annular body. Ring gasket is installed between the working cover, the bottom of the annular body and the protective cover, the protective and working covers are interconnected. In the inner wall of the annular body, two circular elastic metal membranes rigidly constrained along the contour and arranged parallel to each other are provided, on the inner surfaces of which, from the constraint circuits in the annular body to their centers, ring elastic insulating protective coatings are applied to half their radius. Space between the elastic metal membranes, which act as electrodes, is filled with a liquid electrolyte, and the hydraulic fluid fills the space between the working cover, the lower elastic metal membrane and the annular body.

EFFECT: technical result consists in increasing operational reliability and reliability of voltage measurements.

1 cl, 2 dwg