SU1300299A2 - Gauge of level indicator - Google Patents

Abstract

The invention can be used for remote measurement in tanks of great height. To expand the range of controlled media, the space between the outer 8 and 9 and the inner 6 and 7 shells of spheres 2 and 3, separated from each other by bridges 10 of a dielectric material, is filled with electric fluid. When placing the sensor in, 7 «10 /// JV /)) (f rj f Vl-.L r« (L С to with CD N)

Description

to the test medium, the external hydrostatic pressure compresses the spheres of the sealed capsule 1, as a result of which the ferromagnetic fluid of sphere 2 is squeezed out into channel 4, changing the magnetic permeability of the coil 5. Its inductance value, proportional to the measured level, is fixed

The invention relates to instrument engineering and can be used for remote measurement in high-altitude reserves and is an improvement of the known sensor gauge according to the author. St. No. 1113679.

The aim of the invention is to expand the range of controlled media.

FIG. 1 shows a level sensor, constructive view, in FIG. 2 a section A-A in FIG. one.

The gauge contains an elastic sensing element in the form of a vertically mounted hermetic capsule 1, the lower and upper parts of which are spheres 2 and 3 of elastic elastic material (for example, rubber) communicating with each other by means of channel 4 in the middle part of the capsule 1, and coaxially The last measuring winding is of the toroidal coil type 5. The lower part of the capsule 1 (sphere 2) is filled with ferromagnetic liquid, and the upper part (sphere 3) is filled with gas (for example, air). Katutaka 5 imeeT outside hydrophobic coating

Spheres 2 and 3 each have two shells — inner 6 and 7 and outer 8 and 9, which are separated from each other by bridges 10 of a dielectric material that are evenly spaced along the surfaces of the spheres and serve to provide them with the necessary rigidity. On the outer surfaces of the inner shells 6 and 7 and on the inner surfaces of the outer shells 8 and 9 there are metallized coatings, respectively, 11-14, i.e. thin film electrodes applied, for example, by vacuum deposition. Space 15 and 16 between the inner 6 and 7 and outer 8 and 9 sheaths of the device 20. The elasticity of the walls of the spheres 2 and 3 is required by changing the viscosity of the fluid between them by changing the voltage applied to the electrodes 11, 13 and 12, 14. Invention additional to auth. St. No. 1113679. 2 Il.

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Kami is filled with electrofusion fluid.

All sensor elements are housed in a closed cylindrical body 17 made of a dielectric material and having holes 18 and 19 at the top and bottom for equalizing pressure inside and outside the body, the base of which is provided with a mounting flange.

The coil 5 of the measuring winding is connected to the corresponding measuring device 20 (for example, with a good quality meter of type E9-4), a. Metallized coatings are connected in parallel to a regulated constant voltage source 21.

The sensor of the gage works as follows.

The sensor is located at the bottom of the tank, the fluid level in which is measured. In this case, under the action of external hydrostatic pressure, compression of the spheres 2 and 3 of the sealed capsule 1 occurs, as a result of which the gas in the cavity of the sphere 3, which is a compressible medium, is squeezed, and the ferromagnetic fluid that is practically incompressible medium is squeezed out of the cavity of the sphere 2 into channel 4. This leads to an increase in the magnetic permeability of the coil 5, respectively, to an increase in the value of its inductance, fixed by the device 20.

As the measured liquid level decreases, the hydrostatic pressure on the walls of spheres 2 and 3, which due to their elasticity increases in volume, decreases due to which the ferromagnetic bone column in channel 4 decreases, which causes a proportional decrease in the value of coil 5 inductance.

these cases, taking into account the optimal elasticity of the sensing element for each of them.

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With the help of an adjustable source 21, the value of a constant voltage applied to pairs 11-13 and 12-14 of mutually facing metallized coatings (electrodes) is changed, the level of the electrostatic field between them, i.e. in spaces 15 and 16, which leads to a corresponding change in the viscosity value of the special fluid located here and to the installation of the required elasticity of the three-layer walls of spheres 2 and 3 of the sensor element.

The readout device of the measuring device 20, taking into account these preliminaries, is filled with electric liquid-liquid calibration of the sensitive sensor, and on the narzgzhny surfaces inside the element, based on the values of the tight shells and on the internal cavities outer shells are applied — liquids, as well as possible differential metal coatings, of height, are directly calibrated to the regulated source in units of liquid level for all constant voltages.

Claims (1)

5 claims Gage sensor on the bus. St. No. 1113679, differing in the fact that, in order to expand the range of controlled media, the spheres of the sealed chamber are provided with inner shells separated from external bridges of dielectric material, the space between these cases, taking into account the optimum elasticity of the sensing element for each of them. The cells are filled with electrically viscous liquid, and on the arousal surfaces of the inner shells and on the inner surfaces of the outer shells there are metallized coatings connected to an adjustable source of constant voltage. Invention Formula Gage sensor on the bus. St. No. 1113679, differing in the fact that, in order to expand the range of controlled media, the spheres of the sealed chamber are provided with inner shells separated from the outer bridges of dielectric material, the space between 17 eleven Editor K. Voloshchuk Compiled by I.Marahovska Tehred N.Glushchenko Proofreader A.T. Order 1140/39 Circulation 694 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod Project Project, 4 FIG. 2