SU385170A1 - DEVICE FOR MEASURING A LEVEL OF LIQUID - Google Patents

Description

one

The invention relates to a device for extracting: measuring and measuring the liquid level in hydrostatic levels.

Known devices for. measuring the level of liquid in hydrostatic leveling systems containing 1 root, the stem moves in the form of a cylindrical optical fiber, sharpened at the end of the underwire light reflection, a light source and a photodetector.

However, the known devices do not provide fast response times, since the angle of total internal reflection, under which the end of the rod is sharpened, is equal to 90 °, its solid angle is 0.59 -, and at rod speeds from 10 to 30 mm / A droplet forms at its end, distorting the measurement results by 10,100 microns, which is unacceptable for high-precision hydrostatic measurements.

Thus, the speed of the system depends on the magnitude of the solid angle under which the rod is sharpened, and the viscosity of the liquid.

The proposed device allows for faster measurements without sacrificing accuracy. It is characterized in that the rod at the end is made as a part of a solid angle, for example 0.59, i.e. a triangular fiber is used, whose faces converge at the apex, and one

Of these, is the lateral surface of the cone, sharpened by an iodine angle of the floor | HUT of its internal reflection of light, and the other two are vertical boards. Total solid angle

,, 0.59

(angle of view: n) viewer: smaller

i.e., smaller than the pin (but vertical section) of the stem sharpened at the angle of total internal reflection of light. In such a figurum the fiber conduit Prn any vertical comparing, the passage of the ball through its top, the angle at the vertex is less than 90 °. Its movement is accelerated due to the accelerated removal of a drop of liquid by surface tension forces due to a sharper sharpening angle while maintaining one of the faces, sharpened at an angle of total internal reflection of light.

The drawing shows the principle of the device.

The light guide / is a part of a rod sharpened at the angle of a full inner otlin and. Solid angle with

0.59 less -; g-.

Above the top of the diff. R, the optical fiber is located. Illuminator 2, under the liquid level -

30 photodetection 3.

When the light guide 1 is above the surface of the liquid, the light from the illuminator, reflected from the conical part of the optical fiber, is set parallel to the level of the liquid. When the light guide touches the liquid level, it forms a light, part of the light passes inside the liquid and points to the photodetector 3. Because the solid angle of sharpening of the light guide as a result of the cut has been drastically reduced, the accelerated supply of the light guide upwards and the liquid at the end of it does not hold. as it snakes away to be removed by superficial patching. The speed of the mu-zyo system can be reduced without degrading and accuracy. The smaller the part of the fiber that makes up its conical surface, the more accurately the device operates. In this case, it is general, and vel1I1chi, the slice of the regulation is controlled only by the dark level (light level) and the photo receiver, and the speed of the light guide is shifted to and by the non-receiver of the photo-receiver.

Subject and d o rn

A device for measuring the level of a liquid, for example, in hydrostatic leveling systems, containing a cornus filled with a liquid, a vertically disposed rod in the form of a light guide, sharpened at the end of the node by an angle of zero internal reflection, the purpose of acceleration of measurements, the end of the rod is made in the form of a solid angle, for example

0.59

-"- or less.