SU149640A1 - Ultrasonic method for measuring the level of a liquid and a device for its implementation - Google Patents

Description

Ultrasonic methods are known for measuring the level of a liquid, for example, in closed or opaque vessels, using a cathode ray tube with ten-day marker marks and a block of waiting sweeps with a delay.

The proposed method of measuring the level of a liquid provides automatic control of the ultrasound velocity in the liquid. This is achieved by measuring the time TI of ultrasound of a known distance A, for example, from transducer to reflector (reflector) and back, and time T of passing ultrasound distance to the fluid interface and back, and the height of the level of the liquid H is determined from ratio.

A device containing a high-frequency generator, a working chamber with a transducer mounted at the bottom, a cathode ray tube amplifier with ten-day marker marks and a wafer unit, their delays are applied to implement the proposed method.

In the proposed device, in contrast to the known ones, a reflector is fixed in a working chamber at a strictly fixed specific distance.

In order to obtain the required accuracy of measuring the minimum liquid level, the converter is located in the well below the bottom of the working part of the chamber, and the reflector is in the upper part.

The drawing shows a block diagram of a device for carrying out the proposed ultrasonic method for measuring the level of a liquid.

A high-frequency sounding impulse produced by a hc generator is converted into an ultrasonic pulse of piezo 149640 2 by a quartz transducer 2 embedded in the bottom of the working part of chamber 3. The ultrasound propagates in the liquid and, after reflection from the reflector 4 located in the upper part of the chamber and from the liquid-gas interface 5, returns to transducer 2, in which ultrasound is converted to two high frequency electrical impulses. These impulses enter amplifier 6 to amplify and convert them into video pulses, and then enter the vertical deflection of the first plate of the cathode ray tube 7. On the screen of the tube, using the marks of the marker generator 8, intervals 7i and 72 are measured, the first of which corresponds to an ultrasound time of a known distance A from transducer 2 to reflector 4 and back; and the second, an ultrasound time of distance H to the liquid-gas interface 5 and back. Height

liquid level H is determined from the ratio:.

Subject invention

Claims (3)

1. Ultrasonic method of measuring the level of a liquid, for example, B closed or opaque vessels, using a cathode ray tube with ten-day marker marks and a block of standby scans with a delay, characterized in that, in order to automatically control the speed of ultrasound in a liquid, time is measured Tj of ultrasound of a known distance A, for example, from the transducer to the reflector (reflector) and back, and the time T of ultrasound of the distance to the interface of the liquid and back, and the height of the liquid level, I, is determined from the ratio. 2. A device for carrying out the method according to claim 1, comprising a high-frequency generator, a working chamber with a transducer mounted in the bottom, an amplifier, electron beams, a tube with decadal marker marks and a block of pending sweeps with a delay characterized in that in the working chamber a reflector is fixed at a strictly fixed known distance. 3. The device according to claim 2, characterized in that, in order to obtain the required measurement accuracy of the minimum liquid level, the converter is located in the well below the working part of the chamber, and the reflector is located in the upper part of the chamber.