RU1770763C - Method and device for determining liquid quantity in reservoir - Google Patents

Abstract

Usage: isobregen / e refers to the measuring technique and can be used in various industries for measuring the amount of aggressive and non-aggressive liquids contained in different containers. SUMMARY OF THE INVENTION: vertical oscillations are excited in the tank body with a central direct impact of a rubber mallet, directional vibrations are generated using a hollow cone with a truncated apex, vibration parameters are recorded by the change in light intensity at the output of a fiber optic sensor installed inside an equilateral pyramid, the received signal is amplified, converted into indicator readings and are compared with a reference signal obtained in the same way on an empty tank. The device for implementing the method comprises a rubber mallet, a receiving sensor made in the form of a loop of a fiber optic fiber, one end of which is connected to a source, and the other to a light receiver, electrically connected to the indicator through an amplifier and a converter. The receiving sensor is attached to it by a membrane made of thin elastic material is installed in the middle part of the hollow cone with a cut off top having, on the basis of the damper device 2 with p, 1 zp crystals, 2 tablets, 2 ill. (L C

Description

The invention relates to measuring technique and can be applied in various sectors of the national economy for measuring the amount of various containers of aggressive and non-aggressive liquids.

A known method for measuring the amount of liquid in the liquid is to measure qig in that they measure the height of the liquid columns using ultrasonic level gauges according to the principle of lapping. In accordance with this principle, uropn is measured by time of grogging by ultrasonic vibrations of frequency rf and from the emitter to the boundary of two cps and back to the radiation receiver

The disadvantage of this method is the measurement of the amount of liquid in a vessel in volumetric units, the complexity and high cost of the device for its implementation, and the large error of the method when measuring the amount of liquid in small containers.

The closest in terms of its essence is a method for determining the amount of liquid in a tank, which is used as a prototype, and the device w is implemented in full.

In the implementation of the method oud; rum of a rubber mallet on the back excite vertical vibrations in it with a piezo / register their frequency with a probe npeof

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ABOUT

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filtered, compared with a reference signal obtained in the same way on an empty tank.

A device for determining the amount of liquid in a container consists of a rubber mallet, a piezoelectric sensor electrically connected to the indicator through an amplifier and a transducer.

The device operates as follows.

A piezosensor is mounted on the container, a blow is struck against the non-rubber hammer. The resulting directed vertical oscillations, in particular the frequency of the oscillation of the capacitance, are detected by the piezoelectric transducer and transmitted to the amplifier-converter, which amplifies the first harmonic of the oscillation frequency of the capacitance and cuts off all other harmonics. The amplified first harmonic is converted into rectangular unipolar pulses of calibrated duration and stable amplitude. The converted parameters of the oscillations of the container with the liquid are compared with the parameters of the oscillations of a completely empty container and the comparison results are sent to an indicator, the scale of which is placed taking into account the results of the calibration of the physical phenomenon, which establishes the relationship between the volume of liquid in the container and the frequency of oscillation of the container. An analog frequency meter is used as an indicator.

The disadvantage of this method and device, selected as a prototype, is the high error due to the use of a piezo sensor as a receiving sensor.

The purpose of the invention is to improve the accuracy of measuring the amount of liquid in a tank.

This goal is achieved in that direct vertical vibrations are excited by a central direct impact of a rubber hammer on a container and concentrate them in the measurement zone.

In FIG. 1 shows a diagram of an apparatus for implementing a method for determining the amount of liquid in a container; figure 2 is a section aa in figure 1.

A device for determining the amount of liquid with a cog / tiz acoustic concentrator in the form of a hollow cone 1 having, on the basis, a damper device 2 mounted on a container 3 with liquid. In the near zone of the generatrix of the concentrator, a receiving sensor is installed, made in the form of a loop of a fiber optic fiber 4. one end of which

connected to a source 5, and the other to a light receiver b, the latter being electrically connected to an indicator 7 through an amplifier 8 and a converter 9. To a loop of

fiber optic fiber 4 is attached to the membrane 10 of a thin elastic material.

A method for determining the amount of liquid in a container is carried out on the proposed device as follows.

With a central direct impact of a rubber mallet on a container 3, vertical vibrations are excited in it, directional vibrations are generated using an acoustic concentrator 1, and their parameters are recorded by a light detector 6 by a change in the light intensity at the output of the optical fiber 4. The received signal is amplified by an amplifier 8, amplified

0, the signal enters the transducer 9 in which it is converted into the readings of the indicator 7, which are then compared with the readings obtained on an empty tank.

5 The proposed method and device for its implementation in comparison with the prototype allows to increase the accuracy of the measurement by reducing the instrumental and methodical measurement error.

Claims (2)

1. A method for determining the amount of liquid in a tank, which consists in initiating vibrations by striking the wall of the tank, transforming it, and then recording the vibration parameters and comparing them with the standard ones obtained in a similar way in an empty tank, characterized in that, for the purpose of to increase accuracy, vibrations stimulate a central impact and concentrate them in the measurement zone. 2. A device for determining the amount of fluid in a tank containing 5 a shock mechanism and a receiving sensor electrically connected through an amplifier with an indicator, characterized in that that, in order to increase accuracy, an acoustic concentrator, made in 0 in the form of a hollow cone, the base of which is damped, and the casing sensor is made in the form of a loop of a fiber optic fiber mounted cantilever on the membrane in a plane perpendicular 5 to suppress the propagation of vibrations within the concentrator, with one end of the optical fiber being connected to a source and the other to a receiver from zeta radiation. Fig. I AA