DEVICES FOR MEASURING TIME VARIATIONS OF PRESSURE OF LIQUID OR GAS Russian patent published in 2019 - IPC G01L13/00 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment, namely to devices for measuring time variations of pressure of liquid or gas, and can be used in oil and gas production, petrochemical, chemical, food and other industries, in municipal services. Proposed device comprises differential pressure transducer with two inputs, controlled valve communicated via tubes with controlled object nozzle and differential pressure transducer input. Second controlled valve is connected by tubes to the second nozzle of the monitored object and to the second input of the differential pressure sensor, to the output of which the amplification-converting device is connected in series, an inverter, an automatic switch, an analogue-to-digital converter whose output is connected to an automatic system for processing, storing and/or using measurement results. Output of the amplifying-converting device is connected to the second input of the automatic switch. Automatic control device by its outputs is connected to control inputs of the first and second controlled valves, as well as to the third input of automatic switch. First and second controlled valves, amplifying-converting device, differential pressure sensor, inverter, automatic switch, analogue-to-digital converter are connected to power supply.

EFFECT: increased frequency of measuring the time difference of pressure of liquid or gas in a closed vessel or in a controlled section of a pipeline and formation at the output of the device of information which reflects values of these changes at each operating cycle of the device.

1 cl, 2 dwg