| 摘要 |
FIELD: physics, measurement. ^ SUBSTANCE: invention is related to the field of materials analysis by determination of their density and may be used in thermal power plants and other industrial enterprises as instrument for monitoring of quality characteristics of fuel gas. According to invention density meter is available in two versions accordingly with two and one measuring vessels. In the last case reference gas used is atmosphere air. Every of vessels from the side of its upper end has throttle that communicates to atmosphere, density meter sensitive element is arranged in the form of elastic membrane, and device of measuring signal generation is arranged in the form of chamber that is separated by partition into two compartments, at that at least part of partition is specified membrane, and vessels from the side of their lower ends are connected each to one of specified compartments. Membrane may represent round frame with polymer film stretched on it, which is fixed in central part with displacement marker arranged in the form of plate, having shape of central symmetrical flat figure, and radial elastic threads that are evenly stretched between edges of plate and frame. ^ EFFECT: increase of measurements accuracy and simplification of density meter design, which works according to principle of investigated and reference gases densities comparison. ^ 4 cl, 3 dwg |
