SU74770A1 - Angle Measuring Device - Google Patents

Description

Device With electrical capacitive sensors to measure the level of fluidity, in which, depending on: the oscillation of the level between the plates of a capacitor, the capacitance of the last one varies is known.

The subject of the invention is a device for measuring tilt angles by an electrical capacitive method.

The proposed device differs from the known by priming a partially filled conical current with a cone-shaped plastic with a metal bottom of the vessel and two insulated metal plates. These plates are positioned inside the vessel at an angle to each other and form two identical differential capacitors with the bottom of the vessel.

These capacitors are intended to determine the angle of inclination by the mutual change in the capacitance of capacitors depending on the location of the filling liquid.

On fpg. 1 and 2 are schematic diagrams of the proposed device.

In the vessel K, made of plastics of plastic, three plates C |, C2 and O of nz of silver-plated brass and insulated from each other by means of gaskets B. are reinforced.

These three plates comprise a system of two capacitors with a common gasket.

A non-conductive liquid is poured into a vessel whose bottom is plate O, its level is such that it fills only a small part of the gap between the plates of the capacitors.

When the vessel is horizontal, the capacitors C and Cz are equal to each other. When the vessel is tilted in one direction or another relative to the horizontal axis, the non-conducting current releases the gap between one pair of plates and fills the gap between the other pair, as a result of which the capacitance of one capacitor increases and the other decreases.

The circuit diagram of the device is shown in fit. 2. The operation of the circuit proceeds as follows: Winding / transformer (Mathor is connected to an alternating current source. At the terminals of the // and / I windings, voltages appear that are equal in magnitude but are out of phase by 180 ° relative to each other.

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Obm-otka // through capacitance Ci is connected to winding IV, and winding III via capacitance € 2 - to winding VI.

With the vessel in horizontal position, when capacitances C and C are equal, the currents / 1 and / 2 in windings IV and VI are equal in magnitude and opposite in phase, resulting in the voltage between the terminals of windings V and VII being zero. When the vessel is tilted and takes the position indicated in FIG. 2 by the dotted line HH, the capacitance Ci is increased, e, the capacitance Cz is decreased. As a result, the current / increases and the current / 2 decreases. The voltage U Ui - t / a arises at the terminals of the measuring device. When the vessel is tilted to the other side, the capacitance of € 2 increases and the capacitance Ci decreases, resulting in a voltage Lf f / 2-fJi, where the phase has changed by 180 °. Thus, the magnitude and phase of the voltage at the terminals determines the angle and direction of the inclination of the vessel relative to the horizontal axis, the magnitude of the voltage being proportional to the angle of inclination, and the phase indicating the direction of inclination.

Subject invention

A device for measuring tilt angles by an electrical capacitive method, characterized by the use of a cone-shaped metal vessel, partially filled with a non-conductive fluid, and two insulated metal plates symmetrically installed inside the vessel at an angle to each other and forming with the bottom two identical differentially connected capacitors designed to determine the angle of inclination of the mutual change in the capacitance of the capacitors, depending on the location of the level of the liquid filling the vessel.

FIG. one

Chi

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No. 74-770