Tandem type high-resolution high-precision differential pressure gauge

Abstract

The invention relates to the technical field of differential pressure measurement, in particular to a tandem type high-resolution high-precision differential pressure gauge, which is characterized in that the unit height volume of a thick pipe at the lower part of a vertical pipe at the left side of a differential pressure measurement unit is larger than that of a vertical pipe at the right side of the differential pressure measurement unit; the two working fluid interfaces have small displacement in the thick pipe and large displacement in the vertical pipe on the right side. A capacitive sensor is installed in the vertical pipe on the right side to measure the position of a working fluid interface, and the differential pressure value is converted through the position of the working fluid interface. As the interface displacement length of the working fluid is basically the same as the length of the vertical pipe, the height of the measuring device is utilized to the maximum extent, and the maximum resolution is achieved; through series connection of a plurality of differential pressure measuring units, the differential pressure measuring range can be expanded, so that the differential pressure measuring device realizes high-resolution differential pressure testing, has a large measuring range, can resist very high static pressure, meets the requirement of field measurement, and can resist overpressure and protect the differential pressure gauge from being damaged under overpressure.

Description

technical field [0001] The invention relates to the technical field of differential pressure measurement, in particular to a series-type high-resolution high-precision differential pressure gauge. Background technique [0002] There are many occasions in modern industry that need to measure the differential pressure. For example, the fluid flow rate is measured by means of a tube or orifice plate. The ratio of the tube and the orifice plate produces a pressure difference related to the flow rate. To collect this differential pressure information, a differential pressure gauge is required. It is also possible to measure the density and height of the fluid in some containers by measuring the pressure difference, fluid height × fluid density × gravity acceleration = pressure difference, after accurately measuring the pressure difference, the fluid density can be obtained by knowing the fluid height, and the known fluid density The fluid height can be found. [0003] At present...

AI Technical Summary

Problems solved by technology

But the performance can be improved

For example, the higher the resolution of differential pressure measurement, the lower the static pressure resistance and the lower the measurement range.

In addition, high-precision differential pressure gauges are more expensive

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