PROCEDURE MEASURING FLOW VELOCITY OF LIQUID OR GAS

FIELD: measurement of physical quantities. SUBSTANCE: salient feature of proposed procedure measuring flow velocity of liquid or gas based on registration of difference frequency of two coherent light waves propagating in opposite directions and passed through liquid or gas flow mentioned above is t...

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Bibliographische Detailangaben
Hauptverfasser:	ATNASHEV P.V, BOJARCHENKOV A.S, ATNASHEV V.B, ATNASHEV A.V
Format:	Patent
Sprache:	eng ; rus
Schlagworte:	COLORIMETRY INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT,POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRA-RED,VISIBLE OR ULTRA-VIOLET LIGHT MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL METERING BY VOLUME PHYSICS RADIATION PYROMETRY TESTING
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Beschreibung
Zusammenfassung:	FIELD: measurement of physical quantities. SUBSTANCE: salient feature of proposed procedure measuring flow velocity of liquid or gas based on registration of difference frequency of two coherent light waves propagating in opposite directions and passed through liquid or gas flow mentioned above is that this liquid or gas flow fills flow- type dish which opposite edges carry thin partially transmitting layer with thickness under lambda/2 and reflection mirror. Angle included between plane of thin partially transmitting layer and plane of reflection mirror is found from relation sin = lambda/2dn where lambda is length of light wave; d is period of interference bands; n is refractive index of liquid or gas filling flow-type dish. Difference frequency of two coherent light waves is recorded by means of periodic system containing photocells. Technical result lies in possibility of measurement of flow velocity of liquid or gas with registration of difference frequency under 0.1 Hz which can find use in measurement of low flow velocities of pure liquids or gases. EFFECT: measurement of low flow velocities of pure liquids or gases. 1 dwg