FIELD: physics, instrumentation technology.
SUBSTANCE: method includes polarization of liquid running in a pipeline by strong electromagnetic field, and liquid detection in two successive pipeline sections by measurement of its nuclear magnetization. A signal of nuclear magnetic resonance (NMR) is recorded in one of the sections. Duration of time interval t0 from the detection moment is determined based on the condition of equal amplitudes of NMR signal after detection in the first and the second pipeline sections. Liquid flowrate in pipeline is determined by formula 
where V - is volume of pipeline section in which the NMR signal is recorded. The invention improves flow metering accuracy at changing flow conditions and liquid relaxation time.
EFFECT: increased accuracy of liquid flow metering.
1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF MEASUREMENT OF LIQUID DISCHARGE | 1991 |
|
RU2005995C1 |
| METHOD OF MEASURING LONGITUDINAL RELAXATION TIME T1 OF FLOWING LIQUID BY NUCLEAR MAGNETIC RESONANCE | 2020 |
|
RU2740181C1 |
| METHOD OF MEASURING FLOW RATE OF MULTIPHASE FLUID BY PICKING UP NUCLEAR MAGNETIC RESONANCE (NMR) SIGNAL AND DEVICE FOR REALISING SAID METHOD | 2010 |
|
RU2427828C1 |
| METHOD OF MEASURING LONGITUDINAL RELAXATION TIME IN A CURRENT MEDIUM | 2018 |
|
RU2696370C1 |
| METHOD OF CONCENTRATION MEASUREMENT | 2006 |
|
RU2326369C2 |
| METHOD OF TESTING MOVING BLOOD | 1991 |
|
RU2017144C1 |
| NUCLEAR-MAGNETIC FLOW METER FOR MULTIPHASE MEDIUM | 1998 |
|
RU2152006C1 |
| NMR SPECTROSCOPY ON THE BASE OF NMR IAD WITH GRADIENT FIELD | 2003 |
|
RU2251097C2 |
| METHOD OF INVESTIGATING TURBULENT DIFFUSION IN LIQUID FLOW IN PIPELINE | 0 |
|
SU868504A1 |
| NMR METHOD OF LIQUID CONSUMPTION MEASURING | 0 |
|
SU991173A1 |
