SU71752A1 - Device for measuring the level of liquids - Google Patents

Description

The present invention relates to a device for measuring the level of liquids.

A distinctive feature of the proposed device is the use of a vertically located core of a synchronous machine as a sensor, along which the float with a magnet moves.

The device consists of a float 2 (see drawing) carrying a permanent magnet /, and an electric sensor 4. A vertically mounted bark of a synchronous machine, the conductors of which are located in the helical grooves (or groove) 5, is used as a sensor 5.

During rotation of the core 4 in a relatively narrow field of magnets 7 in the winding of the core, current pulses will be generated, whose position changes in time in accordance with the movement of the float 2 along the length of the core. This change can be fixed with the help of an i5 electric lamp fixed on the core axis and fed from its winding. The level of liquid 3 in the vessel is determined by the position of the light

25 Summary in. 6

the spot produced by the lamp on the rotating bar 7, fixed to the axis of the core. For this circuit, it may also be envisaged to use remote transmission of current pulses to the selsyn type receiver.

The change in the position of the generated current pulses in time can be achieved either by means of a helical arrangement of the conductors of the core winding with a straight-line movement of the float and magnets /, or through a helical movement of the float and magnets (by using appropriately shaped guides) with a straight-line arrangement of the conductors of the core. To prevent the float from tilting when a magnet is mounted on it, a cardan suspension system can be used.

In order to increase the accuracy of reading with large fluctuations of the measured level in the proposed device, several cores can be used, located on the same axis along the entire depth of measurement.

385