SU1624261A1 - Device for measuring liquid level - Google Patents

Abstract

The invention relates to a measurement technique and can be used to control the level of a liquid medium. The purpose of the invention is improving the accuracy of controlling the level of a liquid medium. Measure the ionizing radiation flux of the ionizing radiation source 1 intersects at a sharp angle the flat surface level of the liquid medium in the tank 3 and enters the measuring ionizing radiation receiver 2, and the ionizing radiation flux of the additional ionizing radiation source 10 passes through the liquid medium in the tank 3 to the additional ionizing radiation receiver 11 radiation. The measuring and additional ionizing radiation receivers 2 and 11 form signals, the difference of which from the output of the subtraction unit 9 is fed to the low frequency display unit 7, displaying the position of the level of the liquid medium in the tank 3. 2 Il. 4 (LSF.1

Description

The invention relates to a measurement technique, namely, devices for monitoring the level of a liquid medium.

The purpose of the invention is to improve the accuracy of controlling the level of a liquid medium,

Fig. 1 shows one of the possible variants of a device for monitoring the level of a liquid medium; Fig. 2 shows a section A-A in Fig. 1 (the location of the measuring source and receiver of ionizing radiation).

The device comprises a measuring ionizing radiation source 1 and a measuring ionizing radiation receiver 2 located on opposite sides of the tank 3. fixed on the housing 4 and made with a stirrer 5 placed in a liquid medium 6 having a variable density, and the display unit 7. At the same time, the measuring ionizing radiation source 1 is mounted with the possibility of directing the ionizing radiation flux 8 through the level of the liquid medium 6 in the tank 3 at an acute angle to its flat surface.

The device also contains a subtraction unit 9 connected by an output to the input of the display unit 7 and connected by a primary input to the output of the measuring receiver 2 of ionizing radiation rigidly fixed on the housing 4 with which the measuring source of ionizing radiation 1 is rigidly connected, and additional source 10 and receiver 11 ionizing radiation located on opposite sides of the liquid medium. 6 in the reservoir 3. An additional ionizing radiation source 10 is rigidly mounted on the housing 4 with the possibility of forming a flow of ionizing radiation in a plane perpendicular to the plane of the ionizing radiation flux 8 of the measuring ionizing radiation source 1. In this case, the additional ionizing radiation receiver 11 is rigidly fixed on the housing 4 and connected by an output to the second input of the subtraction unit 9.

The device for controlling the level of the liquid medium works as follows.

The ionizing radiation flux 8 of the measuring ionizing radiation source 1 intersects at an acute angle the flat surface level of the liquid medium 6 in the reservoir 3 and enters the measuring ionizing radiation receiver 2. In this case, the measuring receiver 2 of ionizing radiation generates an electrical signal containing a component. which characterizes the change in the level of the liquid medium, and the component determined by the change in the density of the liquid medium B and the influence of the stirrer 5.

The ionizing radiation flux of the additional ionizing radiation source 10 passes through the liquid medium 6 in the tank 3 to the additional ionizing radiation receiver 11, which generates an electrical signal characterizing the change in the level of the liquid medium

0 6 and the effect of the stirrer 5.

The signals of the measuring receiver 2 of ionizing radiation and the additional receiver 11 of ionizing radiation are fed to the first and second inputs

5 of the subtraction block-9, which produces a signal characterizing the change in the level of the liquid medium 6 in the tank 3. The signal of the subtraction block b is fed to the block 7 of indications, the transposition position of the level

0 liquid medium 6

The use of the invention improves the accuracy of controlling the level of a liquid medium. allows to provide high reliability of the device for controlling the level of liquid

5 Wednesday. The invention can be used to measure the level of the melt popimer, nlpzimer in polymerization reactors and condensation o 1, in technology obtained. imiches fibers

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An iCTBO device for controlling the level of a liquid medium containing measuring source and receiver of ionizing radiation located on opposite sides

5 tank mounted on the body and made with a mixer placed in a liquid medium having a variable density, and the display unit, and the measuring source of ionizing radiation is mounted with the ability to direct the flow of ionizing radiation through the level of the liquid medium in the tank at an acute angle to its flat surface, characterized in that

5 in order to improve the accuracy of liquid level control, a subtraction unit is inserted into it, connected by an exit to the input of the display unit and connected by a first input to the output of the measuring receiver of ionizing radiation rigidly fixed on the body, to which the measuring source of ionizing radiation is rigidly connected, and an additional source and ionizing receiver

5 radiation located on opposite sides of the liquid medium, with an additional source of ionizing radiation mounted on the body with the possibility of forming a stream of ionizing radiation in a plane perpendicular to

the plane of the ionizing radiation flux of the measuring ionizing radiation source, and the output of the additional ionizing radiation receiver is connected to the second input of the subtraction unit.

R

FIG. 2

Claims (1)

Claim A device for controlling the level of a liquid medium containing a measuring source and receiver of ionizing radiation located on opposite sides of a tank mounted on a housing and made with an agitator placed in a liquid medium having a variable density, and an indication unit, wherein the measuring source of ionizing radiation is mounted with the possibility of the direction of the flow of ionizing radiation through the level of the liquid medium in the tank at an acute angle to its flat surface, characterized in that, with the aim of higher In order to control the level of the liquid medium accurately, a subtraction unit is introduced into it, connected to the output of the display unit by an output and connected by the first input to the output of the measuring ionizing radiation receiver - rigidly mounted on the housing to which the measuring ionizing radiation source is rigidly connected, and an additional source and an ionizing radiation receiver located on opposite sides of the liquid medium, and an additional ionizing radiation source mounted on the housing with the possibility of forming current ionizing radiation in a plane perpendicular to the plane of the flow measuring ionizing radiation source of ionizing radiation, and the output on the auxiliary receiver ionizing radiation is connected to a second input of the subtraction unit. Aa Figure 2