SU808842A1 - Two-coordinate electrolytic transducer of tilt - Google Patents

Description

one

The invention relates to a measurement technique, namely to electrolytic transducers of the angle of inclination of objects, and is intended to determine the position of building structures, machines and mechanisms.

Electrolytic transducers are known that allow measurement in two mutually perpendicular planes. They consist of a hermetic housing, the upper part of which is made along a large radius sphere, a metal base that acts as a power supply electrode, four measuring electrodes isolated from each other, mounted around a circle in the upper part of the converter housing. The case is partially filled with a conductive liquid - electrolyte C,

12.

3 of the indicated design of electrolytic converters, the resistance between the measuring and supply electrodes changes due to an increase or decrease in the area of overlapping of their end surfaces by a conductive fluid, which is why special tenological quality requirements are imposed.

manufacturing of working surfaces of measuring electrodes. In addition, due to partial loading of the measuring electrodes in a liquid, the possibility of electrolyte getting on the unwetted working surface of the electrode with the slightest shaking of the transducer is not excluded, which leads to a decrease in the stability of the measurements and to a limitation of its sensitivity.

Electrolytic tilt angle transducers with electrodes completely immersed in an electrolyte are also known. Such converters are characterized by higher stability and accuracy of 3, 4j.

However, the sensitivity of the transducers over large measuring angles of inclination remains insufficient.

Claims (5)

The closest in technical essence to the present invention is a two-coordinate electrolytic tilt angle transducer, comprising a dielectric body with an upper hemisphere and a lower flat base, partially filled with electrolyte, and five hollow electrodes. The central electrode is introduced through the upper part of the hemisphere, and four measuring electrodes, placed at right angles to each other through the side walls of the housing. The electrical resistance between the electrode Nm depends on the position of the gas bubble, i.e., the angle of inclination, due to the change in the electrolyte cross section over the volume of the inner cavity of level 15. However, due to the fact that the cross section of the electrolyte in the inner cavity is not uniform ( it is in the middle), then when measuring small angular deviations from the equilibrium position, the sensitivity of the transducer will be low. The purpose of the invention is to increase the sensitivity of the two-coordinate electrolytic tilt angle transducer. To achieve this goal, an electrolytic tilt angle transducer, containing a dielectric case with an upper hemisphere and lower M base, filled with an electrolyte with a gas bubble, one central and four lateral measuring electrodes located in mutually perpendicular planes, is equipped with a movable conductive element electrically connected with the central electrode, and the lower base of the body are made as part of a sphere, forming the direction towards the upper hemisphere. FIG. 1 shows schematically the structure of a converter; in fig. Section A-A in FIG. 1. An electrolytic converter consists of a dielectric body 1, the internal cavity of which is formed by an upper spherical surface 2 and a lower spherical surface 3, a base 4, an electrolyte 5, a gas bubble b, a movable conductive element 7 made, for example, of mercury, a central electrode 8 and side measuring electrodes 9. The measuring electrodes are preferably platinum with a well-developed surface. As electrolyte 5, the alcohol solution of lithium chloride is changed. The sealing of the cell is provided by a sealing gasket 10. The converter is included in the measuring circuit, which makes it possible to register changes in resistance between the central 8 and lateral 9 electrodes. ;. Electrolytic converter operates as follows. When the controlled surface of the object is horizontally positioned, the measuring circuit of the electrolytic converter is balanced. With an arbitrary inclination, the gas bubble b moves, striving to occupy the highest position in the internal cavity of the converter. At the same time, by changing the cross section of the electrolyte 5, the resistance values between the electrodes 8 and 9 change along the internal volume of the sealed housing 1. At the same time, the movable conductive element 7, the density of which exceeds the density of the electrolyte 5, is shifted in the opposite direction. be..the lowest position. The change in the distance between the electrodes 8 and 9 due to the movable conductive element 7 electrically connected to the central electrode 8 increases the imbalance of the electrolytic converter introduced by the position of the gas bubble. Thus, the two-coordinate electrolytic converter detects deviations from the horizontal position and converts them into proportional tilt angles corresponding to the change in electrical resistance between the central: B and 9 measuring electrodes. The technical efficiency of the proposed converter is that the presence of a moving conductive element electrically connected to the central electrode provides a significant increase in the sensitivity of the electrolytic converter, which allows measuring circuits with a lower gain to be used as secondary devices. In addition, an increase in the ratio of the useful signal to the drift value will ensure sufficient stability of the device operation when measuring small angles of inclination. DETAILED DESCRIPTION OF THE INVENTION A two-axis electrolytic tilt angle transducer comprising a dielectric body with an upper hemisphere and a lower base, filled with an electrolyte with a gas bubble, one central and four lateral measuring electrodes located in mutually perpendicular planes, characterized in that, in order to increase sensitivity, it is equipped with a movable conductive element electrically connected to the central electrode, and the lower base of the body is made as part of a sphere, the generators of which are directed towards the upper hemisphere. Sources of information taken into account in the examination 1. USSR author's certificate P 201670, cl. G 01. C 9/18, 01.03.65. ; 2. USSR author's certificate i 440552, cl. G 01 C 9/18, 01.31.72. 3. USSR author's certificate  281922, cl. G 01 P 15/08, 25.06.6.9. 4. The UK patent number 993715, cl. GIN, publish. 1963. 5. Bychkov, OD Levels and micronivelles and their application for geodetic adjustment of structures. M., Nelra, 1973, p. 62-63 (prototype). YU