SU1688166A1 - Device for measuring velocity and direction of flow of fluid medium - Google Patents

Abstract

The invention relates to measuring technique and can be used to measure the flow parameters of a flowing medium, in particular oils. The purpose of the invention is to simplify and increase sensitivity - achieved by installing a diaphragm 5 between the shells 6 and 7, on the side surfaces of which screw grooves are cut, the diameter and pitch of which is equal to the diameter and pitch of the spring 3, the ends of which are connected to the current generator 8. 1 il.

Description

The invention relates to a measurement technique and can be used to measure the flow parameters of the current medium, in particular oils.

The purpose of the invention is to simplify and increase sensitivity.

Fig. 1 shows a device for measuring the speed and direction of molasses in a current medium .; general form; on | ftzg. 2 - node I in FIG. 1.

The device includes a housing 1 made of diamagnetic material, induction | exchange channels 2, a coil spring 3 with 15 ends 4 rigidly fixed in the housing and a synoptic in the middle, a perforated diaphragm 5, which is held in a predetermined position of the shell 6 and 7. Coiled, ud spring connected to a current ’8 generator, Induction windings 2 connected to a measuring circuit consisting of amplitude detectors 9, subtractor 10 and amplifier 11. 25

U with t Roy with. TV / τ τ / 1 as follows

The current from the generator flows through the coil spring 3 and creates a

FILM FLOW, which induces EMF in induction 30 windings 2) P) when material passes through housing 1, the source velocity of which needs to be measured, this material acts on perforated diaphragm 5, stretching part of spring 3, placed in the direction the movement of the material to the perforated diaphragm 5, and the compression of the part of the spring 3 'located on the barely perforated di a-, θ of the fragment 5. This leads to the fact that one of the induction windings 2 covers a smaller one and the other larger number of plugged suppers 3 and in willow

T y

pion windings 2 induce unequal EMF. At the output of the induction windings, a signal appears, which is fed to the amplitude detectors 9, where the conversion of alternating voltage to constant takes place. Then the signal goes to the subtractor 10, at the output of which the signal at each moment of time is proportional to the flow rate of the material passing through the housing 1

When the movement of the material through the housing 1 ceases, the perforated diaphragm 5 is in the neutral (middle) position and the pitch of the coils of the spiral spring 3 is uniform along its length, as a result of which equal emfs are induced in the induction windings 2, there is no signal at the device output.

Claims (1)

Claim A device for measuring the speed and direction of flow of the current medium, comprising a housing, nozzles for supplying and discharging a fluid flow, a diaphragm and a signal pick-up unit are installed on the elastic element inside the housing, which, in order to simplify and increase sensitivity, elastic the element is made in the form of a spring, the diaphragm is installed between two shells, on the lateral surfaces of which helical grooves are cut, the diameter and pitch of which are equal to the diameter and pitch of the spring, while the ends of the spring are alternately connected to the generator of current and node s.ema signal is in the form of induction coils mounted coaxially on the outer surface of the housing.