SU1758510A1 - Meter of pipe flow density - Google Patents

Description

Isobretenis OIHOC tg k measuring te / nick

The faithful device for measuring the density of the sweat5 contains in the pipeline in the pipeline or in a pumping zone and a generator

The disadvantage of this is that the mouth of the device is that it cannot be used for a multiphase environment, which limits the scope of its application.

The device closest to that of the preampler / / contains a closed zigzag conductor placed on a dielectric cylinder, connected through elements of a registering resonant frequency and a generator, the output of which is a signal that is connected to pressure control 5.

The disadvantages of this procedure are the measurement accuracy when controlling coaxial flows. The latter, in the case of controlling coaxial flows (e.g., passing through a tur- / inny flowmeter), is subjected to hydrodynamic influence. In turn, this causes a change in propey

1 Oopsgei, sarzanyh / m ff zelichi rom, p o dp s, -; 1aev this is a mozhet g pichol, lt i go to v iv kvittsatchonnyh wickedness „1, makes L dimension a long lhlno error

The purpose of the invention is to increase the point-CIH determination of the density of the co-hygliphy streams.

The drawing is a diagram of the haemophus orifs for.

The device consists of cnnju orc p. The cylinder's cylinder is filled with guns, E hOCH is rotated tubing, boos, e 2 HP cylinders are looser. sabaz11, conductor 3, soy nominal i 4 and 5 correlates -twkcho with p. Meth 6 of the resonant frequency and the georant-ori of electromagnetic oscillations Gene sztor 7 is connected to the plots of the machining 8 is connected to the CCD / KA | about 9 o 1 PyyubsobotststskostogGsyug .po - T0.

Regisgos (cf. rcpcfs ss:, turn consists of (s. I.-ippitug. - l vector 11, coeot ent rt) vnpct a tel 12 and trlmgr V3 s eegpt, LV 14

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the output of which is connected to the input of the generator 7 and two comparators 15 and 16 included between the output of the ingress pump 14 and the inputs of the trigger 13,

The device works as follows.

When the flow passes through conduit 2, the dielectric cylinder 1 flows around a controlled flow, which stabilizes in front of the measuring section with flow stabilizers 10. The resonant frequency of the long line formed by the closed zigzag conductor 3 changes in accordance with the dielectric constant of the flow and, accordingly, its density . However, the electric field for each type of oscillation has a non-uniform character, which can lead to inaccuracies in measuring the density of non-uniform flows. Therefore, in the proposed device, the difference between the frequencies of oscillations of the first and second types can also be used as an informative parameter, since it weakly depends on the structure of the controlled flow, since the difference of the corresponding electric fields in the controlled volume is close to const. The resonant frequencies of the electromagnetic oscillations of the closed zigzag conductor 3 are excited through the coupling element 5 and through the coupling element 4 are fed to the recorder 6, which, controlling the operation of the generator 7, maintains its frequency equal to the resonant frequency.

Registrar 6 works as follows.

When the device is turned on, the integrator 14 begins to increase or decrease the signal (depending on the initial conditions), which is fed to the input of the generator 7 and changes its frequency. When a certain level is reached, the corresponding comparator (14 or 15) issues a trigger signal

13, SWITCHING THE LATEST. whereupon the sign of the change in signal at the comparator output is reversed. When the oscillator generation frequency 7 enters the region of the resonant frequency of the sensing element, a signal is recorded from the amplitude detector 11, the extremum of which causes the trigger 12 to trigger, which triggers the trigger 13. This

leads to a change in the sign of the increase in cm at the output of the integrator And which, in turn, leads to a change in the oscillator frequency from the opposite side and the passage of the resonant frequency in a different direction. This process is repeated, with the result that the frequency of the generator 7 is maintained equal to the resonant frequency. After a corresponding recalculation of the frequency in the processing unit 8, the measurement result is displayed on the indicator 9.

Claims (1)

Apparatus of the Invention A device for determining the flux density in a pipeline, comprising a sensitive element in the form of a closed zigzag conductor deposited on the outer surface of a dielectric cylinder, wherein the sensitive element is connected to the generator and the recorder of the resonance frequency, s the generator output through the signal processing block is connected to the detector, which is, with the hope of determining the density in coaxial streams , the dielectric cylinder is solid, provided with a .v.um stabilizer on the ska and installed coaxially to the pipeline, and a recorder of the resonant frequency made in the form of an amplitude degregor, connected in series with the integrator through a shaper trigger, and d – r / x comparators connected to the integrator output and three Gere inputs. 3 L