Method for remote control of level and density of liquid in tank

FIELD: measuring equipment.

SUBSTANCE: method relates to measurement equipment and can be used for monitoring level and density of liquid in tanks of tank farm in real-time, that is relevant for enterprises of oil-extracting, oil processing, aircraft, medical, food industry. Method consists in fact, that pulse acoustic signal is generated for measuring level and density of liquid in tank, then reflected from the liquid acoustic signal is recieved and transformed into electric signal which is subjected to analogue-to-digital conversion, digitized reflected signal and probing signal undergo Fourier transformation, obtained complex amplitude spectra of probing and reflected signals are submitted in exponential form, their amplitude and phase components are separated, desired level HX and density ρX of liquid is determined as solving the mathematical expressions.

EFFECT: invention is aimed at expansion of functional capabilities of method, related to complex determination of two parameters at the same time: level and density of liquid in the tank of tank farm.

1 cl, 1 dwg



Same patents:

FIELD: measurement equipment.

SUBSTANCE: inventions relate to measurement equipment, namely to methods and devices for determining different parameters of liquids, namely oil products, stored or transported in tanks, and can be used in systems for determining volume and weight of liquids. A sensor of medium characteristics with a vibration sensitive element and a built-in temperature transducer is moved in test liquid on different levels of submersion, and density and viscosity of liquid is measured, thus controlling variation of vibration frequency of the sensitive element of the sensor, thus measuring liquid temperature at the same time. Level measurement is made by calculating the number of signals per certain length of movement of the sensor. By processing density, viscosity and temperature data, such liquid parameters, as levels of its delamination and levels of boundary lines of liquid/air media and oil product/produced water are determined. The device for the method's implementation includes sensor 1 consisting of vibration detector 1.1 and temperature transducer 1.2. Sensor 1 is attached to tape cable 2 wound on drum 3 that is rotated by stepper motor 4. Cable 2 at its being drawn rotates measurement wheel 5 with encoder 6. Cable 2 is provided with inductive sensor 7 of tension and sensor 8 of upper position. The other end of cable 2 is connected to electronic unit 9.

EFFECT: enlargement of functional capabilities and scope of application.

3 cl, 2 dwg

FIELD: measurement equipment.

SUBSTANCE: density control device includes a metering tank with a cover plate, to which a pressure meter is connected, a bottom made in the form of a membrane separating the metering tank from a pneumatic chamber with a nozzle arranged in it, which is connected to atmosphere and connected through a throttle to a feed line. The metering tank with a piston and a spring inside is connected to a variable volume chamber; the control inlet of the variable volume chamber is connected to the nozzle of the first pneumatic valve and to the outlet of the pneumatic adder. The nozzle of the second pneumatic valve is connected to the metering tank and to the variable volume chamber. Nozzle chambers of pneumatic valves are connected to atmosphere, and control inlets of the first and the second valves are connected to the outlet of the first pneumatic toggle switch. The metering tank is connected to the nozzle of the third pneumatic valve and to the first inlet of the pneumatic adder, the second inlet of which is connected to the nozzle chamber of the third pneumatic valve, to the control chamber of which the outlet of the second pneumatic toggle switch is connected.

EFFECT: higher measurement accuracy.

1 dwg

FIELD: chemistry.

SUBSTANCE: method of determining surface tension and/or density of molten metal, which employs photometry of a resting large droplet, wherein during analysis, solid samples are loaded into the heating area of a horizontal-type electric furnace, after which each of the loaded solid samples is analysed. Each solid sample is placed on a separate substrate. Said substrates with the solid samples are loaded into the heating area of the horizontal-type electric furnace simultaneously, followed by simultaneous analysis of all the samples. An apparatus for determining surface tension and/or density of molten metal comprises a horizontal-type electric furnace with an area for heating solid samples under analysis, a device for simultaneously placing multiple solid samples thereon and a rod for moving the solid samples into the heating area. The device is configured to move into the heating area of said electric furnace and the rod is configured to move into the heating area of said device, which is designed to simultaneously place multiple samples thereon.

EFFECT: high efficiency of analysis, broader functional capabilities of determining surface tension or density by simultaneously obtaining and synchronously comparing parameters of the samples under analysis, shorter experiments and low power consumption.

2 cl, 4 dwg

FIELD: measurement equipment.

SUBSTANCE: in method of measurement of liquid parameters the difference between the gravity and the floating force of partially submerged buoy is measured, the angular movement is formed by means of action of forces on arms of the angular hinge having orthogonal load, the conversion of angular movement into an electric signal is performed the value of which is used for determination of integrated density, the signal proportional to liquid level from the tank bottom, is measured separately, the liquid volume in the tank is determined, which being multiplying by integrated density gives the mass of liquid in the tank. Into the device for measurement of liquid parameters in the tank, containing the buoy and the microcontroller, the angular hinge, which fitted with a hinge rotation angle sensor and orthogonal load, and also the level gage are added. The buoy is fixed on the angular hinge, and outputs of the rotation angle sensor and the level gage are connected to the microcontroller.

EFFECT: minimising errors of measurement of integrated density and liquid level in the tank.

2 cl, 2 dwg

FIELD: machine building.

SUBSTANCE: device contains explosive charge enclosing the metal enclosure with cavity for gas inlet by means of the pipeline passing through the specified charge and enclosure. From the cavity side the pipeline is made branching at specified angle to the pipeline axis with holes creation in the enclosure. Along the pipeline axis a metal rod is installed. Thermocouple is installed in the metal rod to measure initial temperature of the studied gas.

EFFECT: device ensures high cleanness of the compressed gas due to gas-metal jet exclusion in the pipeline.

2 cl, 4 dwg

FIELD: measurement technology.

SUBSTANCE: present invention relates to the systems and methods for non-invasive measuring of mechanical properties of non-gaseous, free-flowing materials in a vessel and, in particular, for measurement of density and parameters, related to shear resistance of non-gaseous, free-flowing matter. The method for non-invasive simultaneous determination of density and variable, related to shear resistance of non-gaseous free-flowing matter, consists in that it is located in a vessel at a known or constant level. According to the example the method and device use the configurable mathematical model for determination of density and variable, related to shear resistance on the basis of measurements in the system containing fill material, vessel wall and dynamic instrument interacting with the wall.

EFFECT: possibility for expansion of measurement range, improvement of accuracy of measurements and ensuring of greater usability of ultrasonic methods for measuring of physical properties of non-gaseous materials.

28 cl, 15 dwg, 5 tbl

FIELD: instrumentation.

SUBSTANCE: proposed device is composed by measuring vessel with cover whereto pressure gage is connected. Bottom is composed of membrane separating measuring vessel from air chamber accommodating nozzle communicated with atmosphere and connected via orifice to feed line. Variable-volume chamber is connected to measuring vessel and accommodating piston and spring communicated with said air chamber and air valve first nozzle, second nozzle of the latter is connected to measuring vessel. Note here that nozzle chamber with first nozzle is communicated directly with atmosphere. Throttle is connected to nozzle chamber with second nozzle, throttle outlet being communicated with atmosphere while control chamber is connected to pneumatic toggle switch.

EFFECT: control automated by simple and cheap means, simplified measurements, higher accuracy of results.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to measurement equipment, and namely to hydrostatic devices for liquid density measurement, and can be used in different branches of industry. A hydrostatic liquid density meter made in the form of two U-shaped tubes, the first one of which is filled with liquid with known density and equipped with a level meter with a scale. The first elbow of the second U-shaped tube is connected to the second elbow of the first tube, and the second elbow is made in the form of a bell submerged into test liquid.

EFFECT: improving accuracy (error does not exceed 0,5% at H=1 m), providing flexibility of test of liquids contained in tanks without any sampling under conditions of acting production works.

1 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to facilities of analytical laboratory equipment, namely, to gas density analysers. A laboratory gas density analyser comprises a miniature turbulent narrowing device, the inlet of which is connected via a tee with a chamber for compression of analysed gas, made in the form of a spiral from a thin-walled metal tube, and the outlet of a measurement chamber of a pressure indicator, one of walls of which is made in the form of an elastic membrane, and its inlet is connected via a valve with a line of analysed gas. Also the analyser comprises a pneumatic tumbler connected to the outlet of the turbulent narrowing device, a syringe, the inlet channel of which is connected with the outlet channel of the chamber for compression of analysed gas, and the body is equipped with a nozzle, location of which is provided by the possibility to create a through chamber from the syringe as the piston is advanced to the maximum, a metre of time intervals with connecting and disconnecting inlets. At the same time the analyser additionally comprises a piezoresistive converter of force into an electric signal arising on an elastic membrane, electronic comparators of maximum and minimum signals of the piezoresistive converter and a reservoir with cooling liquid, where the chamber is located for compression of analysed gas. Besides, the outlet of the piezoresistive converter is connected with inlets of comparators, the outlet of the comparator of the maximum signal of the piezoresistive converter is connected to the connecting inlet of the metre of time intervals, and the outlet of the comparator of the minimum signal of the piezoresistive converter is connected to the disconnecting inlet of this metre.

EFFECT: increased accuracy of measurement of gas density.

1 dwg

FIELD: measuring instrumentation.

SUBSTANCE: device is intended for measurement of particle sedimentation parameters in a fluid medium, particularly in drilling fluids. Device is a vessel in the form of a hollow cylinder consisting of two coaxial cylindrical parts (1, 2), first part featuring a bottom and second part connected tightly with the first part (1) by plug-in connection. At the end facing the first part (1), the second vessel part (2) features a shifting gate (8), e.g. in the form of iris aperture separating internal space of the first part (1) tightly from internal space of the second part (2) for determination of density difference in top and bottom parts of drilling fluid left to settle down for a definite time.

EFFECT: simple and reliable device for reliable measurement of fluid media parameters regardless of particle size and type in the fluid media.

4 cl, 3 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method includes loading a sample to a given tension value in the material and measuring the propagation time of an acoustic wave in a direction perpendicular to the loading direction, wherein the sample is stretched or compressed to tension σ, which is below the proportionality limit of the material, measuring the time t1 of the propagation of the acoustic wave between two parallel surfaces of the sample, unloading the sample, respectively compressing or stretching the sample to tension σ, measuring the time t2 of the propagation of the acoustic wave between said surfaces of the sample and determining the acoustoelastic communication coefficient using a given mathematical expression.

EFFECT: high accuracy of determining the acoustoelastic communication coefficient of material.

FIELD: physics.

SUBSTANCE: transducer to be calibrated is arranged at calibration unit to excite displacement pulses therein. Received signals are registered and compared. Note here that said displacement pulses are excited with the help of friction emission acoustic source. Obtained friction emission acoustic signals are registered. Then, said signals are used to determine autocorrelation of said signals, hence, to perform the relative calibration of acoustic emission transducer.

EFFECT: higher calibration quality.

2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to system for making of calibration reflectors at the pipe. Portable system comprises bed to be fitted at the pipe, cutting tool, motor connected with cutting tool to drive in compliance with preselected pattern, electrode connected with cutting tool, power source connected with electrode and aforesaid pipe. Note here that said power source can feed voltage from electrode to pipe for material removal therefrom. Dielectric fluid source in contacts with via fluid with pipe for material removal. Note here that motor and power source and/or dielectric fluid source are arranged at the bed.

EFFECT: possibility to make calibration standard from high-pressure vessel pipe by cutting calibration reflectors.

15 cl, 4 dwg

FIELD: physics.

SUBSTANCE: device includes a radiating element, the investigated seismoacoustic transducer, a reference mirror, an optical photodetector, a laser and an optical prism with a semitransparent mirror placed at an angle of 45° to the base. The prism is placed between the radiating element and the investigated seismoacoustic transducer. The radiating and control elements used are a piezoceramic ring with which the optical photodetector is arranged concentrically. The reference mirror and the optical photodetector are acoustically decoupled with the radiating element and the prism.

EFFECT: high sensitivity and simple design of the device.

1 dwg

FIELD: instrumentation.

SUBSTANCE: temperature measurement and ultrasound speed are measured in the measured gas, the speed in pure hydrogen is determined at the same temperature, and the concentration of hydrogen in gas mix is calculated using the mathematical expression considering the ratio of ultrasound speed in pure hydrogen squared to ultrasound speed in the measured mix of gases squared and the ratio of molar mass of admixtures in hydrogen to the molar mass of pure hydrogen are determined.

EFFECT: simplification of hydrogen volume concentration measuring system, increase of its long-term stability and decrease of measurements errors.

2 cl, 1 dwg

FIELD: testing technology.

SUBSTANCE: invention relates to methods of testing and operational ultrasonic product control. To improve the reliability of ultrasonic non-destructive control prior to carrying out the control the product is loaded by load sufficient to disclosure of hypothetical defect such as crack in the place of control to a value that would provide a reflection of the ultrasonic wave from the defect and made it detectable.

EFFECT: improving reliability and quality of the product is achieved.

4 cl, 5 dwg

FIELD: physics.

SUBSTANCE: method includes measuring reference analogue signals using first and second microphones of an acoustic interferometer, analogue-to-digital conversion thereof, calculating a transfer function through continuous wavelet transformation of each of the measured reference signals, calculating reflection coefficients and sound absorption coefficients, presenting the calculation results in graphical form in the form of a curve of sound absorption coefficients versus frequency or geometric mean frequencies of 1/n octave bands, where n is an integer. The reference used is a deterministic analogue signal with duration of not less than 13 s with an exponentially rising frequency in the range of 100-400 Hz.

EFFECT: high accuracy of determining sound absorption coefficients of materials in the low-frequency range.

2 dwg

FIELD: measurement equipment.

SUBSTANCE: device to compensate error of measurement of an ultrasonic locator comprises a generator of ultrasonic pulses connected to an emitter, and the following serially connected components: a receiver, an amplifier, a threshold device, a time interval generation unit, a unit of time interval measurement and a unit of control and indication, the output of which is connected to the generator and input of the time interval generation unit, a source of reference voltage, connected to the input of the threshold device, a quartz generator connected to the unit of time interval measurement, at the same time the second generator of ultrasonic pulses is connected to the second emitter, the following components are connected in series: the second receiver, the second amplifier, the second threshold device, the second unit of time interval generation and the second unit of time interval measurement, besides, the source of reference voltage is connected to the second input of the second threshold device, the input of the second unit of time interval measurement is connected to the quartz generator, and the output of the second unit of time interval measurement is connected to the unit of control and indication, outputs of which are connected to the second generator and the second unit of time interval generation.

EFFECT: reduced error and increased stability of measurements in waveguide distribution of ultrasonic oscillations.

2 dwg

FIELD: measurement equipment.

SUBSTANCE: ultrasonic signal is radiated, a response signal is received, the time interval is measured between the radiated and the received signals, and the distance is detected to the reflecting surface by multiplication of the speed of ultrasound propagation in controlled medium by the measured time interval. Radiation, reception of ultrasonic signals and measurement of time intervals between radiated and received ultrasonic signals is carried out on two frequencies with different periods, then these time intervals are compared, and corrected in accordance with the present mathematical expression.

EFFECT: provision of the possibility to reduce error and increase stability of measurements in waveguide distribution of ultrasonic oscillations.

2 dwg

FIELD: electricity.

SUBSTANCE: ultrasound immersion multisection piezoelectric transducer comprises hermetic package filled with damping substance, piezoelectric cells installed inside the package and placed symmetrically in regard to the converter acoustic axis and lens placed from the side of radiation surface of piezoelectric cells, acoustic axes of piezoelectric cells are intercrossed at the longitudinal axis of the converter, polarization vector of all piezoelectric cells is directed to the radiation side or to the damping substance side, at that lens is common for all piezoelectric cells or it consists of separate sections. Piezoelectric cells are placed so that they form convex or concave surface in regard to lens, all piezoelectric cells are made with positive and negative electrodes common for them, which cover gaps between piezoelectric cells filled with polymer compound and connected to sealed electric connector. Lens and damping substance with their surfaces are faced to the formed piezoelectric cells and polymer compound and each of them adjoins electrodes at these surfaces tightly; at that lens is glued to the electrode placed at piezoelectric cells or adjoins the electrode tightly through the layer of acoustically conductive fluid.

EFFECT: potential increase of the operating zone length and expansion of direction pattern for the piezoelectric transducer at simultaneous simplification of its design.

6 cl, 3 dwg

FIELD: instrumentation.

SUBSTANCE: unit for calibration of borehole liquid flowmeters contains the computer-based control panel, the parallel flowing checking system connected through the input pipeline with the block of reception chambers consisting of reference flowmeters with different measurement ranges installed in series with hydraulic resistance regulators and control valves in parallel pipelines, and through the output pipeline, connected through the electric pump and the adjusting gate to the drain tank, the drain tank is connected to the electric pump and through the control valve with the gas separating filter which is connected by the input pipeline of the block of reception chambers to them through control valves, which are mounted with a possibility of connection of any of reference flowmeters into a unified hydraulic circuit with the calibrated borehole flowmeter located in any reception chamber both downstream, and upstream, and the control panel is connected to electric pumps and reference flowmeters.

EFFECT: expansion of functionalities, calibration both for injection, and for operational wells in conditions, maximum closed to real ones in pipes with various diameters at any value of drilling fluid flow rate.

1 dwg