Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (G01N27)

G   Physics(388509)
G01   easuring; testing(231465)
G01N27                 Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (g01n0003000000-g01n0025000000; take precedence;measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials g01r)(10915)
G01N27/02 - By investigating impedance(1071)
G01N27/04 - By investigating resistance(144)
G01N27/22 - By investigating capacitance(1080)
G01N27/28 - Electrolytic cell components(119)
G01N27/32 - Calomel electrodes(24)
G01N27/327 - (16)
G01N27/333 - (94)
G01N27/34 - Dropping-mercury electrodes(11)
G01N27/36 - Glass electrodes(28)
G01N27/38 - Cleaning of electrodes(23)
G01N27/401 - (1)
G01N27/403 - (11)
G01N27/404 - (2)
G01N27/406 - (27)
G01N27/407 - (56)
G01N27/409 - (12)
G01N27/41 - Oxygen pumping cells(362)
G01N27/411 - (11)
G01N27/413 - (5)
G01N27/414 - (9)
G01N27/416 - (281)
G01N27/417 - (50)
G01N27/419 - (4)
G01N27/447 - (21)
G01N27/453 - (16)
G01N27/85 - Using magnetographic methods(180)
G01N27/87 - Using probes(121)
G01N27/90 - Using eddy currents(1365)

Atmosphere parameters monitoring device // 2614831
FIELD: measurement equipment.SUBSTANCE: atmosphere parameters monitoring device, comprising a housing, a display, an information collection and processing module, containing a database of dangerous gas concentration limits, a gas composition measuring module with dangerous gas sensors, sound and light alarm. The housing is made explosion-proof, and the device further comprises an information transmission module, a module to measure temperature, pressure, humidity, and the gas composition measuremen module is provided with a sampling pump, a measuring chamber and the gas mixture flowrate sensor, transmitting signals to the information collection and processing module and controlling the work of the sampling pump; dangerous gas sensors are built into the measuring chamber. The second device embodiment comprises a remote measuring unit with a gas composition measuring module and the module to measure temperature, pressure, humidity, and operates without sampling pump.EFFECT: increased efficiency of atmosphere parameters monitoring by increasing the measured values number and reducing their error.5 cl, 4 dwg

ethod for express assessment of dry baking yeast quality // 2614667
FIELD: food industry.SUBSTANCE: method involves the use of the detecting device "electronic nose" based on an array of 8 piezosensors with the basic oscillation frequency of 10-15 MHz, whose electrodes are modified with coatings sensitive to alcohols and carbon dioxide, for which purpose films made from acetone and toluene solutions, as well as from chloroform suspensions of carbon nanotubes, are applied to the electrodes, with the total weight of each coating after the solvent removal of 4-10 mcg; the signals of an array of piezosensors are registered in the real-time mode in the form of the "visual imprint"area (S(τ)); to do this, 2 samples of dry baking yeast are weighed, the samples are transferred into the samplers, distilled water pre-heated to 37°C is added, and the resulting solutions are stirred; the further measurements are performed as follows: after 5 min, the equilibrium gas fraction above one sample of yeast water suspension is taken with a gas syringe, injected into the detection cell, and the signals of the piezosensors and S1(5)are recorded during 1 min; after cleaning the detection cell and the piezosensors, the equilibrium gas fraction (EGF) is taken in an amount of 1 cm3 for 1-2 min and repeatedly after 5, 10 and 15 min, and S1(10), S1(15), S1(20)are recorded; 10 minutes after the time of the samples mixing, the solution of sucrose is introduced into the second sampler with the yeast water suspension; 5 and 10 min after, 1 cm3 of EGF is taken above the sample, the signals of the sensors array and S2(15), S2(20) are recorded, and the changes of the areas of "visual marks" of the sensor array signals for the 15th and 20th minute of measurement (∆S(15)=S2(15)-S1(15), ∆S(20)=S2(20)-S1(20)) are calculated, reflecting the differences in the total content of volatile substances in the EGF over the samples while activating dry yeast with water and sucrose; to assess the dry yeast quality, the yeast quality indicator (YQI) is calculated as the difference of areas of "visual marks" on the 20th and 15th minutes of measurement (YQI = ∆S(20)-∆S(15)), reflecting a change in the content of volatile substances in the EGF over the yeast sample during the process of their aactivation with sucrose; if YQI is less than 0±50, the conclusion about the low quality of the yeast is made.EFFECT: simplification of determining the dry yeast quality in comparison with known techniques, along with significantly reducing the time and material costs.1 ex, 2 tbl, 1 dwg
Polarographic oxygen sensor // 2614348
FIELD: measuring equipment.SUBSTANCE: invention relates to measurement of values of hydro-chemical-physical parameters of water medium and can be used separately or in multi-channel converter of hydro-chemical-physical parameters of water medium, for measurement of content of dissolved oxygen in water medium, in particular in fresh and sea water during ecological research. According to invention polarographic oxygen sensor comprises body filled with electrolyte with hole in upper part, membrane made of at least two layers of gas-permeable material, tightly closing said hole, two electrodes – cathode adjacent to membrane, and anode placed in volume of electrolyte, lower support layer of membrane made of material allowing unobstructed passage of oxygen molecules dissolved in water to cathode with strength characteristics, providing strength at dynamic and static loads, occurring during operation, and upper selective layer is made in form of polymer coating deposited on support layer.EFFECT: technical result is reduction of time constant with provision of required service life of sensor.1 cl, 1 dwg

Automated extraction of nucleic acids by size // 2614255
FIELD: biochemistry.SUBSTANCE: invention relates to biochemistry. Invention is described, which includes method for selection of nucleic acids by size. Method involves stages of movement of nucleic acids from sample via channel by means of electrophoresis, automatic tracking of movement of reference fraction of nucleic acids via channel, assessment of estimated time of arrival of target fraction of nucleic acids in hole for extraction in channel, extraction of fluid medium containing target fraction from hole to extract at estimated time of arrival.EFFECT: invention extends range of products for selection of nucleic molecules by size.44 cl, 15 dwg

ethod for quantitative determination of triazavirin by voltammetry (versions) // 2614022
FIELD: chemistry.SUBSTANCE: invention relates to analytical chemistry, in particular, to voltametric method for determining drug triazavirin. Method can be used for quantitative determination of said compound in powder and its medicinal forms. Invention can be used in pharmaceutical industry for controlling technological processes and quality of pharmaceutical drugs, waste water and air zone of chemical-pharmaceutical enterprises, in pharmaceutical control laboratories for determination of active substances of medicinal agents. Invention is based on capacity of triazavirin to be recovered at various types of graphite electrodes and comprises converting triazavirin from a sample into an aqueous solution and direct (without preliminary accumulation on an electrode) voltammetric determination of triazavirin in it on a background of 0.1 mol/l nitric acid with registration of cathode peaks in square-wave mode capturing voltametric curves in range from 0.2 to (-0.6) V at a rate of potential sweep 160 mV/s. Concentration of triazavirin is determined by peak height in potential range from 0.10 to (-0.40) V relative to a silver chloride electrode by triazavirin standard addition method.EFFECT: invention enables design a sensitive and rapid method for quantitative determination of triazavirin by voltammetry in substance and dosage form for controlling quality of drug.2 cl, 1 dwg, 3 tbl, 2 ex

Volt-ammetric method for determination of coenzyme q10 in cosmetic creams // 2613897
FIELD: chemistry.SUBSTANCE: method refers to the field of chemical industry and allows to determine coenzyme Q10 content in cosmetic creams using the method of differential pulse cathodic voltammetry. The essence of the method consists in the fact that volt-ammetric measurement is carried out in the background electrolyte methanol : Britton-Robinson solution in ratio 9:1 with potential sweep rate of 0.1 V/s using an indicator diamond electrode. Cathode peak is recorded in the potential range from -0.5 V to 0 V. Coenzyme Q10 concentration in cosmetic creams is calculated with the help of calibrating curve by standard coenzyme Q10 solution at potential of -0.40 V.EFFECT: use of this method allows to quantify coenzyme Q in creams with high accuracy for quality control at all production stages.1 tbl, 2 dwg, 1 ex

Device for determining the oxygen concentration // 2613596
FIELD: measurement equipment.SUBSTANCE: device for determining the oxygen concentration, comprising a sensor disposed in the measuring chamber, and a power supply. The device according to the invention further comprises a cymometer, wherein the sensor element is designed as a microwave generator, and the power supply output coupled to an input microwave power generator, the power output of the microwave generator is connected to the cymometer input.EFFECT: improved accuracy of measurement of oxygen concentration.1 dwg

ethod of producing gas sensor based on thermovoltaic effect in zinc oxide // 2613488
FIELD: nanotechnologies.SUBSTANCE: invention relates to nanotechnology and can be used in making gas sensors. Disclosed is a method of making gas sensors, comprising a housing, a two-layer nanostructure of ZnO-ZnO:Cu installed therein on a base, point contacts connected to terminals of the housing placed in an insulator and a nozzle providing contact of detected gas with a sensitive element. Two-layer nanostructure of ZnO-ZnO:Cu, in which a thermovoltaic effect is observed, is synthesised via sol-gel technology from sol by dissolving an inorganic zinc salt in alcohol and adding a surfactant, followed by stirring with subsequent ageing of sol. Lower layer of nanostructure is formed from pure zinc oxide by immersing substrate at ⅔ length in sol and drying. Upper layer of zinc oxide is doped with copper, formed by two or three times dipping of other end of substrate at ⅔ length with subsequent drying and annealing.EFFECT: invention enables to make a gas sensor based on thermovoltaic effect in zinc oxide, which has high sensitivity to reducing gases.3 cl, 4 dwg

Ammonia semiconductor sensor // 2613482
FIELD: chemistry.SUBSTANCE: invention relates to gas analysis and specifically to the detection devices used to detect and measure trace elements of ammonia and can be used for environmental monitoring. The sensor comprises a semiconductor base and a substrate. The semiconductor base is made of solid solution polycrystalline film with composition of (CdTe)0,5(CdS)0,5, and the electrode area of a piezoelectric crystal resonator serves as the substrate.EFFECT: invention enables to determine content of ammonia with sensitivity which is several times higher than that of existing sensors.3 dwg

Electrochemical method of methane concentration measurement in nitrogen // 2613328
FIELD: chemistry.SUBSTANCE: into a sample gas stream at the temperature from 450 to° 700C an electrochemical cell is placed with the cavity formed by the two discs of the oxygen-permeable solid electrolyte, on the opposite surfaces of the discs pairs of electrodes are located, DC voltage in the range of 600-1500 mV is supplied to the electrodes of one of the discs, with supplying the positive pole to an inner electrode, whereby the electrolysis of water vapour and pumping the oxygen resulting from electrolysis from the sample gas stream into the cell cavity is carried out by the electrochemical circuit: an outer electrode - solid electrolyte - an inner electrode; in the process of achieving a steady state, when the diffusive flux of methane oxidation products from the cell cavity becomes equal to the incoming flow of sample gas entering the cell, the limit current flowing through the cell is measured, and the methane concentration in nitrogen is determined by the limit current value corresponding to the content of oxygen spent for methane oxidation.EFFECT: provision of possibility to simply and reliably measure the methane content in nitrogen.4 dwg

Sensor for fluid-soluble gas // 2613199
FIELD: measuring equipment.SUBSTANCE: sensor for measuring concentration of fluid-soluble gas includes: housing (100), which is coated with selectively permeable membrane (60) and is filled with fluid medium (30) of sensor; at least two electrodes (10, 20) located inside housing (100), wherein said electrodes (10, 20) are coated with fluid medium (30) of sensor in at least one detection site (40); and ion-balancing means (50) located inside housing (100) and at a distance from detection site (40) of electrodes (10, 20), and which is in contact with fluid medium (30) of sensor, to remove contaminating ions from fluid medium (30) of sensor.EFFECT: invention enables formation of a device for measuring concentration of fluid-soluble gas with improved resistance to drift and low production costs.15 cl, 7 dwg

Solvent diffusion coefficient determining method in capillary porous material massive items // 2613191
FIELD: physics, measurement equipment.SUBSTANCE: invention relates to measurement equipment and can be used to examine mass transfer processes in capillary porous materials for solvent diffusion coefficient determination in building materials and structures, as well as in food, chemical and other industries. The solvent diffusion coefficient determining method in capillary porous material massive items consists in creating, in the tested specimen, of uniform initial content of substances distributed in the solid phase, bringing the specimen flat surface in contact with the solvent dose pulse point source, waterproofing of this surface and determination of time to achieve maximum in the curve of EMF variation of the galvanic converter with electrodes arranged on the surface in a concentric circle relative to the solvent impact point and calculation of the desired diffusion coefficient. Note here that in addition, the specimen is handled in the solvent saturated steam atmosphere at the specified control temperature, and the solvent equilibrium concentration in the tested specimen solid phase is determined. Then the specimen is dried, and the tested specimen density in dry condition is determined. Then the speciman is exposed to pulse by a solvent dose from the range calculated using the formula: , where ρ0 is the tested specimen density in the dry state, Us is the tested specimen solvent equilibrium concentration when contacting with the solvent saturated steam at the specified temperature,r0 is the distance between the electrodes and the point of solvent dose impact on the monitored item.EFFECT: invention provides for improved monitoring accuracy and reduction of time consumption and costs for studies.2 cl, 1 dwg

ethod of determining thiols // 2613053
FIELD: chemistry.SUBSTANCE: invention relates to the analytical chemistry and can be used in medicine, agriculture, environmental monitoring. According to the invention, method of determining the thiols is carried out using stripping voltammetry in 3M NaOH solution in the presence of silver ions in a solution with 4⋅10-5…8⋅10-5 M concentration in the solution, test portion is injected containing from 3⋅10-8 to n⋅10-5 M thiols, the solution is being stirred for 10-30 s, +0.05 V electrolysis potential is being applied on a silver electrode for 60 s. Thiols are concentrated on the surface of the silver electrode as a partially soluble complex compound, then voltammogram is recorded at a linear potential sweep of 5 mV / s. Dissolving of the silver thiolates peak is observed at a potential of -0.98 V and linearly depends on the thiols concentration in aqueous solutions.EFFECT: invention enables to reduce the lower bound of determined content and use ecologically clean silver electrode.4 dwg

Working electrode printed on substrate // 2612954
FIELD: chemistry.SUBSTANCE: invention can be used for analysis of electrochemical solutions. Electrode for electrochemical cell comprises substrate (1), electrode (2), conducting track (4) and recess (3), wherein substrate extends over a first thickness, between a first face and a second face, wherein electrode is printed on first face, wherein conducting track is printed on second face, wherein substrate is electrically insulated, wherein electrode is conductive to electricity essentially through graphite particles, wherein conducting track is conductive to electricity and contains particles of silver, wherein recess is conductive to electricity and is made of an ink which comprises a binary mixture of graphite and silver in proportions where quantity of silver divided by sum of quantities of graphite and silver present in binary mixture is comprised within an interval from 0 to 1, wherein recess extends within substrate from first face to the second face, wherein recess is in electrical contact with electrode at level of a first junction located on first face, wherein recess is in electrical contact with conducting track at level of a second junction located on second face, and wherein linear density of silver particles in recess at level of first junction, perpendicularly to current lines, when a current passes through first junction, is lower than linear density of silver particles in conducting track at level of second junction, perpendicularly to current lines when a current passes through second junction. By using such binary mixture of carbon and silver in recess (3), silver contamination in electrochemical cells using silver tracks is reduced.EFFECT: disclosed is a working electrode, printed on a substrate.10 cl, 4 dwg

Circuit for determination of distribution in phases in multiphase medium comprising at least one highly conducting phase // 2612855
FIELD: electricity.SUBSTANCE: application: for the determination of distribution in phases in a multiphase medium. The invention consists in that the circuit comprises three stacked planes of the wire electrodes, which are stretched in the sensor body, wherein the electrodes are arranged in each plane at a small distance from each other; two planes of the electrodes are isolated from investigated medium using the insulating layer, and one of the two planes of the electrodes functions as a radiation plane, and another plane functions as a receiving plane, at the same time both of these planes are rotated at an angle relative to each other and arranged in parallel; the third opposite plane of electrodes is not isolated and has a ground, and thus highly conductive phase parts which are in contact with it are similarly grounded, and wherein the circuit is connected to an electronic measuring device to measure the capacitance or permittivity of the medium in the individual crossing points which are formed by emitting and receiving electrodes, while the electronic measuring device sequentially loads corresponding emitting electrodes with alternating voltage, whereas the other emission electrodes are switched to ground, and electronic measuring device simultaneously performs the function of instantaneous current signal response in parallel on all the receiving electrodes.EFFECT: invention enables the rapid determination of the phases or components distribution in the flow section.10 cl, 3 dwg
ethod for controlling mine shafts surface roughness in salt rocks // 2612755
FIELD: mining.SUBSTANCE: in several places of the test surface, using measurement instruments, average depth of the depressions is determined, then in the same areas the electrical capacitance value of the air gap formed between the surface of the mine shaft built of salt rocks and the surface of the instrument for measuring the electrical capacitance when placing it on the test surface is determined. Thereafter, based on the data obtained, the dependence of the electrical capacitance of the air gap in some areas of the controlled surface on the depth of the depressions in the same areas is determined, then the electrical capacitance on the entire lateral surface of the rock wall in the picotage sealing area is determined. Thereinafter its roughness is calculated.EFFECT: providing opportunities to reduce the complexity by using electrical capacitance as a controlled parameter for determining the roughness degree of the mine shaft sections in salt rocks.

Device for controlling steam turbine rotors along the axial channel // 2612729
FIELD: machine engineering.SUBSTANCE: device for control of steam turbine rotors for axial channel includes a mechanism for moving the module to detect defects according to the invention the apparatus body are three channels with sleeves through the first channel is fed by couplant, the second - sensor in the third channel is sponge collecting liquid contact, wherein the housing is mounted either longitudinal wave sensor, or a surface acoustic wave sensor.EFFECT: provision of opportunities detection and prediction of defects and resource estimation of the steam turbine rotor.2 cl, 5 dwg
Semiconductor sensor element for determination of lead ions in aqueous solutions and preparation method thereof // 2612358
FIELD: electricity.SUBSTANCE: semiconductor sensor element for determination of lead ions in an aqueous solution contains as the sensitive material a thin film of lead sulphide doped with iodine and applied onto a dielectric substrate. Forming the film is carried out by its deposition from a reaction mixture containing a lead salt, thiocarbamide, triple-substituted sodium citrate, ammonium hydroxide, ammonium iodide.EFFECT: invention enables to obtain a semiconductor sensor element based on a lead sulphide film doped with iodine for selective determination of lead ions in aqueous solutions characterized by high sensitivity and dynamism of response, good results reproducibility, as well as availability of production.2 cl, 1 dwg, 1 tbl
ethod for potentiometric determination of speed of generation of peroxyl radicals // 2612132
FIELD: measurement technology.SUBSTANCE: invention relates to a novel method of determining speed of generating peroxyl radicals.EFFECT: developed is a novel method of determining speed of generating peroxyl radicals, which provides higher accuracy, reliability and reproducibility of results, as well as extends the range of analyzed substances and reagents.1 cl, 4 dwg, 1 ex
Amperometric detection of lactic acid on platinum electrode // 2612000
FIELD: chemistry.SUBSTANCE: determination of lactic acid on platinum electrode in borate buffer as a background electrolyte (pH 9.18), maximum reduction current potential E=-0.7 V, using silver-silver-chloride reference electrode. Determination of lactic acid involves preparing lactic acid sample solution, followed by base titration (0.01-0.1M KOH) with simultaneous recording of maximum lactic acid reduction current, and plotting amperometric titration graph for determination of the equivalence point and alkali volume, used for the lactic acid titration. The disclosed method may be used for lactic acid determination within a concentration range of 3.0⋅10-5-1⋅10-1 mol/dm3.EFFECT: improved determination accuracy.6 dwg, 3 tbl, 3 ex

Amperometric method of measuring carbon dioxide concentration in nitrogen // 2611578
FIELD: physics, measurement technology.SUBSTANCE: invention relates to the field of gas analysis. The method for measuring carbon dioxide content in nitrogen, according to the invention, is that an electrochemical cell is placed into the sample gas stream, having the cavity formed by two discs of the solid proton conducting electrolyte of the composition La0,9Sr0,1XO3-s; on the opposite surfaces of one disk the electrodes are located, to which DC voltage in the limits of 400-500 mV is fed, with feeding the negative pole to the internal electrode, whereby the electrolysis of water vapours in the sample gas and pumping the hydrogen obtained by the electrolysis from the sample gas stream into the cell cavity by the electrochemical circuit of the disk with the electrodes: the outer electrode - solid electrolyte - the inner electrode in the process is carried out; in the process of reaching the stationary state where the diffusion stream of recovery carbon dioxide products from the cell cavity will be equal to the incoming stream of the sample gas, the limit current flowing through the cell is measured, and by the value of the current limit corresponding to the content of the hydrogen spent on the carbon dioxide recovery, the concentration of carbon dioxide in nitrogen is determined.EFFECT: invention enables simple and reliable measurement of carbon dioxide in nitrogen.3 dwg

icroelectrodes in ophthalmic electrochemical sensor // 2611557
FIELD: ophthalmology.SUBSTANCE: eye mounted device includes electrochemical sensor, which is embedded inside polymer material made with possibility of being installed on eye surface. Electrochemical sensor includes working electrode, comparison electrode and reagent, which selectively reacts with analyte to generate measurements associated with concentration of analyte in fluid medium, which affects eye mounted device. Working electrode may have at least one size less than 25 mcm. Comparison electrode may have at least five times larger area, than area of working electrode. Part of polymer material can enclose working electrode and comparison electrode so, that electric current, transmitted between working electrode and comparison electrode, passes through this at least partially enclosing part of transparent polymer material.EFFECT: microelectrodes for ophthalmic electrochemical sensor are disclosed.22 cl, 7 dwg
ethod for determination of organic impurities in water and aqueous solutions // 2611390
FIELD: chemistry.SUBSTANCE: invention relates to analytical chemistry and may be used for monitoring of natural and waste water as part of general environmental monitoring. The method involves determination of ethyl benzene, decane, nicotinic acid and nicotinamide in water by taking water samples directly into cartridges filled with a polymer adsorbent material. Cross-linked copolymer of acrylamide is used as a polymer adsorbent and has water adsorption ability of 10 to 200 g/g. Its macromolecules contain 5 to 100 mol.% of units of dimethylaminoethylmethacrylate, or 2-acrylamido-propanesulphonic acid, or 1-10% of chitosan units. Known test methods are used for analysis of the solutions extracted from the adsorbent.EFFECT: invented method achieves 10-fold reduction of water sampling time at various ambient temperatures and allows for sample analysis for paraffins, benzene hydrocarbons, organic amides and their acids.1 tbl, 5 ex

Combustible gas sensors including composite support structures and combustible gas sensors with multiple active elements // 2611074
FIELD: physics, instrument engineering.SUBSTANCE: claimed group of inventions relates to the combustible gas sensor. The claimed group of inventions includes sensors for combustible gases and the operation method of the combustible gas sensors. Moreover, the combustible gas sensor comprises at least the first sensing element containing the first conductive element with an average diameter of less than 20 microns, and electrically connected to the electronic circuit, the combustible gas sensor further comprises the first support element having the first and the second fixed end and an intermediate portion extending between the first fixed end and the second one, and the intermediate portion provides support to the first conductive element, wherein the first support element is characterised by the coefficient value calculated as a ratio of its tensile strength, expressed in pound-forces per square inch (psi), to the heat conductivity expressed in watts / (cm⋅°C) more or equal to 250,000.EFFECT: invention provides the reduction of the energy consumption requirements for the element operation in a certain temperature range, and also its increase to the maximum strength / bearing capacity at the simultaneousl reduction of the heat loss.36 cl, 5 dwg, 3 tbl

ethod of eddy current testing of electrically conductive objects and device for its implementation // 2610931
FIELD: electricity.SUBSTANCE: eddy current is excited in an electrically conductive object with a static magnetic field, and the electrically conductive object is scanned with eddy current converter, comprising at least one static field inductor and at least one sensor of changing electromagnetic field at the moving of eddy current converter and a conductive object, signals corresponding to the change in the electromagnetic field are recorded, and measurement results are used to determine the presence of defects. At the same, the excitation of eddy currents in the electrically conductive object is performed by an attachable-type eddy current transducer where sensors of changes in the electromagnetic field are mounted on the pole of the static field inductor, and the excitation of eddy currents is carried out by the magnetic field changing sensor. Eddy current transducer consists of at least one static field inductor and at least one electromagnetic field changes sensor, and the analysis and processing unit having an input coupled to the output of the electromagnetic field changes sensor. An attachable-type eddy current transducer is used as converter for eddy currents. Electromagnetic field change sensor is attached to the pole of static field inductor. Electromagnetic field change sensor and static field inductor are made as a single unit.EFFECT: possibility to provide one-way access control.18 cl, 7 dwg

Eddy current testing method // 2610350
FIELD: power industry.SUBSTANCE: eddy current testing method consists in that eddy current signal connected to the electronic unit of detachable eddy current transducer is being compensated, eddy current transducer is mounted above a crack, the change of eddy current signal is being registered relative to compensated eddy current signal and the resulting change is being used to determine the depth of the crack in the controlled area. Compensation of eddy current signal is being performed during the installation of the eddy current transducer on the controlled area, before compensation and before the eddy current signal changes registration relative to the compensated eddy current signal under the working end of the eddy current transducer non-magnetic electrically conductive plate with holes is being installed, the holes are set alternately on the eddy current transducer axis, and the diameters of the holes must be different during the compensation and the registration of the change of the eddy current signal.EFFECT: higher reliability of defect characterization assesment of depth of a crack.2 cl, 6 dwg

Semiconductor gas sensor for oxygen trace substances // 2610349
FIELD: physics, measurement equipment.SUBSTANCE: invention relates to gas analysis and namely to detection devices used to record and measure oxygen traces content. The invention can be used for environmental monitoring. The technical result of the invention is to improve sensitivity and adaptability of sensor manufacturing. The sensor includes a semiconductor base and a substrate. The semiconductor base is made of polycrystalline film of a solid solution of cadmium telluride, reinforced by cadmium selenide with composition (CdSe)0.5(CdTe)0.5, a piezoelectric resonator electrode pad serves as a substrate.EFFECT: invention with significantly simpler manufacturing techniqe provides several times higher oxygen sensitivity than that of existing sensors.3 dwg

agnetic propriety detection device // 2610341
FIELD: materials.SUBSTANCE: invention can be used for contained in sheet of paper magnetic material magnetic properties detection. Summary of invention is, that device comprises magnetic module, which generates magnetic field perpendicular to paper sheet transportation direction on transportation path and paper sheet transportation parallel surfaces, where magnetic field intensity decreases according to paper sheet transportation in transportation direction, and after achieving 0 (zero) magnetic field intensity increases, wherein magnetic field direction is opposite direction; and plurality of magnetic sensors, located in magnetic field, generated by magnetic module in places, in which magnetic field intensity mutually differs and which detect paper sheet magnetic properties, transported along transportation path, wherein magnetic material magnetic properties, contained in sheet of paper, are detected based on said plurality of magnetic sensors output signals, obtained at magnetic material detection.EFFECT: technical result is enabling possibility of magnetic property detecting device creation with small dimensions, made with possibility of multiple types of magnetic materials with different value of coercitive force differentiation and detection.14 cl, 28 dwg
ethod for determining ascorbic acid and dopamine in water at joint presence using modified electrodes // 2610220
FIELD: chemistry.SUBSTANCE: invention relates to electrochemical analysis and is intended for the qualitative and quantitative determination of ascorbic acid and dopamine using voltammetric method in a wide range of objects (food, pharmaceuticals, environmental objects, biological objects, et al.) A method for determining ascorbic acid and dopamine content at their joint presence using modified carbon-contained electrodes, wherein refined nanoparticles of Au, Pt, Ni, Cu metals are used as modificators injected by depositing (not less than 5 minutes) from their dispersions (with a concentration not less than 0.05 g / l), produced by laser ablation of metal targets in pure solvents.EFFECT: invention provides solution to the problem of complexity and labour intensity of the electrode modification process for the simultaneous determination of ascorbic acid and dopamine, as well as the need for polymers and graphene with its derivatives which is expensive and difficult to handle and store.9 dwg, 8 ex

Use of electrical capacity for analysis of polycrystalline diamond // 2610041
FIELD: chemistry.SUBSTANCE: device includes a capacitance measuring device having positive and negative terminals, a leached component comprising a polycrystalline structure, the first wire and the second wire, the leached component includes the first surface and the opposing second surface, the first conductor electrically connects the positive terminal of one of the surfaces of the leached component, and the second conductor electrically connects the negative terminal of the other surface of the leached component.EFFECT: provision of opportunities for non-destructive measurement of the leaching depth within the polycrystalline structure.24 cl, 9 dwg
Gas analyzer // 2608979
FIELD: measuring equipment.SUBSTANCE: invention relates to measurement equipment and can be used in gas analyzers when monitoring inert gases by oxygen. Proposed is to introduce a additional thermocouple in the gas analyzer using a potentiometric solid electrolyte cell (PSEC) for measuring oxygen concentration in inert gases and nitrogen. Additional thermocouple with its junction is installed near the rounded part of the PSEC test tube and electrically is connected in series with the thermocouple arranged in the center near the PSEC external electrode.EFFECT: technical result is elimination of thermal EMF of the PSEC.1 cl, 1 dwg

Analysis and quantitative determination of glycated hemoglobins by capillary electrophoresis, buffer compositions and kits for capillary electrophoresis // 2608911
FIELD: medicine.SUBSTANCE: invention relates to medicine and concerns analysis of one or more glycated hemoglobins in biological sample. Method of analysis is performed by capillary electrophoresis of one or several glycated hemoglobins in biological sample, wherein said glycated hemoglobin or hemoglobins include at least one beta-globin chain, including glucose residue, attached to amino acid in N-end position of said beta-globin chain. Said method involves use of buffer composition, containing at least one compound, which specifically forms complex with residue or residues of glucose, attached to amino acid in N-end position of glycated hemoglobins in biological sample, and provides formation of several negative electric charges at alkali pH values on said glycated hemoglobin or hemoglobins, where said compound is selected from 3-carboxyphenylboronic acid, 3,4-dicarboxyphenylboronic acid, and 3,5-dicarboxyphenylboronic acid. Invention involves application of method for diagnosing diabetes in human or other mammal and/or monitoring of glycemic balance. Invention concerns kit for analysis and its application. Invention also concerns use of compounds: 3-carboxyphenylboronic acid. 3,4-dicarboxyphenylboronic acid, and 3,5-dicarboxyphenylboronic acid for separation of one or more of said glycated hemoglobins.EFFECT: present invention enables reliable separation of glycated hemoglobins, HbA1c in particular, from other hemoglobins of abnormal types, mixed types (labile, acetylated, carbamylated types) and other minor fractions (especially from HbA1a and HbA1b), present in biological samples.22 cl, 18 dwg, 15 ex

ethod for rapid analysis of biochemical consumption of oxygen and device therefor // 2608443
FIELD: biochemistry.SUBSTANCE: group of inventions relates to determination of biochemical consumption of dissolved oxygen in water. Device for rapid analysis of biochemical consumption of dissolved oxygen includes a measuring reservoir, in form of a flow amperometric cell, including a comparison electrode and a working electrode in form of amperometric sensor of dissolved oxygen, switching unit, a computing unit for addition, computing unit for calculation and comparison, computing unit for measurement and indication. Device is equipped with a water treatment unit, amperometric cell is equipped with a membrane placed before working electrode, with immobilised thereon active sludge, and comparison electrode and working electrode are connected by outputs to inputs of computing unit for comparison and computing unit for addition, output of computing unit for addition is connected to input of computing unit for measurement and indication. Also disclosed is a method for rapid analysis of biochemical consumption of dissolved oxygen using described device.EFFECT: group of inventions broadens functional capabilities and provides high accuracy of analysis.3 cl, 4 dwg
ethod of diagnosing technical state of hydraulic system filter element // 2607852
FIELD: measurement technology; equipment for diagnostics.SUBSTANCE: invention is intended to determine the technical state of a hydraulic system filter element in the functional mode. Method of diagnosing the technical state of a hydraulic system filter element involves determining the filter control parameter and its transmission to the memory or the operator during operation of the hydraulic system, herewith measured is dielectric permeability of the filter element, continuously compared is current value of dielectric permeability of the filter element with its maximum tolerable value and determined is expected residual life of the filter element by the proposed formula.EFFECT: invention increases accuracy of estimating the technical state of a hydraulic system filter element, provides predicting its residual life thus increasing efficiency of maintenance of filter elements taking into account their actual technical state.1 cl

Device for determining gas concentration // 2607830
FIELD: gas industry.SUBSTANCE: invention relates to a device for determining gas concentration, which is capable of obtaining accurate concentration of sulphur oxide (SOX) contained in exhaust gases of internal combustion engine. Device for determining gas concentration includes an element for determining gas concentration and electronic control unit. Element for determining gas concentration includes a first electrochemical element. Electronic control unit is configured to determine concentration of sulphur oxide, contained in analysed gas, based on a first determined value, coordinated with current, flowing through first electrochemical element, obtained when first specified voltage is applied to first electrochemical element. First specified voltage is voltage at which water and sulphur oxide, contained in analysed gas, are decomposed at first electrode of first electrochemical element. Invention provides creation of a device for determining gas concentration, which is capable of determining concentration of sulphur oxide contained in exhaust gases, which are analysed gas, high accuracy when using a gas analyser of limit current.EFFECT: invention provides creation of a device for determining gas concentration, which is capable of determining concentration of sulphur oxide contained in exhaust gases, which are analysed gas, high accuracy when using a gas analyser of limit current.18 cl, 6 dwg
Solid-state electrochemical sensor for determining water vapors partial pressures in randomly selected gas mixture // 2607825
FIELD: measuring equipment.SUBSTANCE: invention relates to measurement equipment. Solid-state Electrochemical sensor for determining of water vapors partial pressures in randomly selected gas mixture according to invention represents one of planar structure elements, produced on dielectric plate, such as glass ceramic or polycore, contains silver-chloride electrodes, representing arbitrary topological configuration silver electrodes, with nonuniform layer of AgCl, formed by electrochemical method on their surface, and contact areas for external circuit conductors, free from AgCl, and plasticized solid electrolyte on electrodes surface.EFFECT: invention enables to form sensors, in which in structural version of sensors liquid substances are absent, which makes them safe, accurate, with high reproducibility and repeatability of measurements, as well as compact.7 cl
ethod for evaluation of geometrical dimensions of pipe section wall and weld seams defects according to ultrasonic intra-pipe defectoscope data with the help of related indications search // 2607766
FIELD: measuring equipment.SUBSTANCE: invention can be used: for evaluation of geometrical sizes of a pipe section wall and weld seams defects. Core of the invention is that according to an ultrasonic intra-pipe defectoscope data with the help of related indications search evaluated are the length, the width and the depth of a defect.EFFECT: provided is the possibility of evaluation of geometrical parameters, classification of type of a defect in a pipe section wall and weld seams at reduction of labour costs for processing a separate section of an oil pipeline and at reduced time for detecting hazardous defects.1 cl, 4 dwg

Semiconductor gas sensor of ammonia trace impurities // 2607733
FIELD: measuring equipment.SUBSTANCE: invention relates to gas analysis, in particular, to devices used for recording and measuring the content of ammonia trace impurities. Sensor includes a semiconductor base and a substrate. Semiconductor base is made from a polycrystalline film of indium antimonide doped with cadmium telluride – (InSb)0.98(CdTe)0.02, and the substrate used is an electrode pad of a piezocrystal resonator. Proposed sensor with considerable simplification of its manufacturing technology makes it possible to determine the content of ammonia with a sensitivity several times higher than that of existing sensors.EFFECT: technical result is higher sensitivity and manufacturability of the sensor.1 cl, 3 dwg
ethod of identifying monoethanolamine vapour in gas mixtures, equilibrium vapour above solid, liquid samples // 2607388
FIELD: chemistry.SUBSTANCE: invention relates to analytical chemistry of organic compounds. Method is characterized by that, it uses two sensors based on piezoelectric crystal resonators (PCR) of volume acoustic waves with a base oscillation frequency of 10.0 MHz, on electrodes of which a film is applied from saturated solution of potassium fluoride in acetone, for which electrodes are lowered into a saturated solution of potassium fluoride in acetone and held for 10 and 5 s, after removing free solvent for 10 minutes at temperature t = 100 °C, applying potassium fluoride phase weighing 4.0 and 1.0 mcg, respectively, holding for 2 minutes for establishing stability of initial frequency of oscillation of each sensor F40, F10 (Hz), preliminarily analysed solid phase weighing 1–5 g is ground, liquid phase with volume of 10 cm3 is taken and held in a weighing cup with a polyurethane plug for 20 and 10 minutes respectively, analysed gas mixture or equilibrium vapour above solid, liquid samples with volume of 5 cm3 is extracted with a gas syringe and injected into a detection cell at a rate of 1 cm3/s, wherein substances react with potassium fluoride coatings and change of frequency of oscillation of both sensors, measuring oscillation frequency of sensor with weight of film of 4.0 mcg 30 s after injection of vapour F430 (Hz) and for sensor with weight of film of 1.0 mcg 60 s after injection F160 (Hz), based on obtained data, calculating for each sensor change in oscillation frequencies relative to initial frequency and, if ratio of changes in frequency of sensors with weight of films of 4.0 and 1.0 mcg, respectively, is 1.2 ± 0.3, conclusion on presence in gas mixture of monoethanolamine vapour is made.EFFECT: possibility of determining presence of vapour of monoethanolamine in gas mixtures, equilibrium vapour above solid, liquid samples with high rapidness and selectivity in minimum volume of sample.1 cl, 1 ex

Glucose measurement method and system // 2606769
FIELD: measurement technology; electricity.SUBSTANCE: group of inventions relates to determination of concentration of glucose. Method for determining glucose concentration uses the system that includes a test strip with a reference electrode and a working electrode, which is coated with a reagent layer applied on matrix layer containing a mediator, and a meter. Proposed method comprises the following stages: applying a test voltage between the reference and working electrodes; measuring the first, second and third test currents at the working electrode after applying a blood sample containing analyte; determining glucose concentration using the following formula: , where G is the concentration of glucose; I1 – first test current; I2 – second test current; I3 – third test current; p – exponential component, which is equal to the value calculated using the formula: , where a and b – correction parameters; intercept 1 is the length of the intercept determined from linear regression of curve of dependency from the reference glucose concentration; and inclination of 1 is the value of inclination determined from linear regression of curve of dependency from the reference glucose concentration; and displaying the glucose concentration. Also disclosed is a method for determining the test current corrected to hematocrit, as well as a system for measuring the concentration of glucose.EFFECT: higher accuracy of determining the concentration of glucose.15 cl, 11 dwg, 3 tbl

Differential sensor, control system and method for detecting anomalies in electroconductive materials // 2606695
FIELD: electronics.SUBSTANCE: invention relates to nondestructive detection of anomalies in electroconductive materials. Essence of invention consists in that differential sensor for detecting anomalies in electroconductive materials comprises a permanent magnet; first coil with one or more first windings wound around permanent magnet and defining first axis of coils, and second coil with one or more second windings wound around permanent magnet and defining a second axis of coils running across first axis of coils.EFFECT: technical result is high accuracy of detecting anomalies in electroconductive materials.13 cl, 8 dwg

Device for inspecting phase composition of steel // 2606519
FIELD: metallurgy.SUBSTANCE: invention relates to non-destructive inspection of metals and alloys, specifically to methods for inspecting phase composition, and can be used in metallurgy, metal working, machine building, aircraft engineering for controlling quality of products and stability of technological processes. Device for inspecting phase composition of steel includes a sensor (D), which consists of a housing made from nonmagnetic material, and a secondary instrument (VP) with an alphanumeric display for displaying output information. Housing accommodates interconnected instrument transformer (1), consisting of primary excitation winding (OV) and secondary measurement winding (OI), sinusoidal oscillation generator (2), current sensor-converter (3), digital-to-analogue converter (5), analogue-to-digital converter (4). Secondary device additionally comprises microprocessor module (7), connected to instrument transformer (1) through transceiver (10) of secondary instrument, coupled with transceiver (6) of sensor by means of radio signal, and controlling amplitude of output voltage of sinusoidal oscillation generator.EFFECT: technical result of present invention is improvement of reliability and accuracy of automatic measurement of content of ferrite phase in a specimen or sample.3 cl, 2 dwg

Acoustic and calorimetric sensor for enclosed rooms gas composition changes signalling // 2606347
FIELD: gas industry.SUBSTANCE: invention can be used for creation of sensor of atmosphere composition change in enclosed volumes. Summary of invention consists in fact, that gas sensor contains temperature conductive substrate from crystalline material with plane-parallel surfaces, on working surface of which film heater from electrically conducting material is arranged, and on nonworking surface is temperature measuring device based on acoustic delay line, interdigital type electromechanical piezoelectric transducers of which are connected to generator and output signal recorder, heater control unit, film heater is made in form of set of individual elongated elements from gas-sensitive materials, selected under condition of their electrical resistance changing with adsorption of different by composition gases, elements are connected to individual heaters control unit outputs, wherein each said element is restricted at long sides by grooves, filled with heat- and noise-insulating material, temperature measuring device based on acoustic delay line is made multi-channel by number of elongated elements, each channel is placed in direction of surface acoustic waves energy flows propagation and/or plate resilient modes of different orders n in substrate, wherein emission and reception of said waves and/or modes is carried out by individual generation and reception systems at frequencies fn, determined by expression fn=Vn/λ, where Vn is speed of surface acoustic waves or plate resilient modes, λ is period of interdigital transducers, and elongated elements are arranged along projections of said power flows propagation directions onto substrate working surface.EFFECT: technical result is enabling possibility of increasing total number of gases at increased measurement accuracy and reduced threshold of actuation.10 cl, 8 dwg, 1 tbl

ethod and device to determine ph value of solution // 2606190
FIELD: measuring equipment.SUBSTANCE: invention also discloses a device for measuring the value of pH and method of measuring pH of the solution. Device for measuring value of pH may contain: the first electrode and the second electrode, the first electrode and the second electrode shall be immersed in solution; power supply source to supply bipolar rectangular potential pulse signal to the first electrode and the second electrode; the first electrode contains an electrode made of transition metal / transition metal oxide, and the second electrode contains an inert electrode; current measurement devices, connected between the first electrode and the second electrode for measuring current I passing through the first electrode and the second electrode; and a computing unit for calculating pH value of the solution, based on the measured current.EFFECT: invention enables to avoid use of a glass electrode and saturated calomel electrode, which benefits to daily maintenance of the device for measuring pH value and environmental protection, and it also benefits to miniaturization and reduced restrictions for pH-measuring devices, besides, only measuring of current passing through the electrode pair, for calculating the solution pH value simplifies monitoring of variation of the solution pH value in real time.11 cl, 7 dwg

System for measuring at least one parameter of solution (versions) and method of assembling said system (versions) // 2606170
FIELD: chemistry.SUBSTANCE: disclosed is system (100) for measurement of at least one parameter of a solution in container (101). Container (101) contains solution (101a). Protective layer (105) is deposited on top of at least one sensor (103) with an integrated antenna and at least one wall (101b) of container to enable creation of an impermeable joint between container and said at least one sensor (103) with an integrated antenna. Said at least one sensor with an integrated antenna is made to allow presence of an active electromagnetic field, which depends on thickness of container and protective layer. Said at least one sensor with an integrated antenna together with label (102) is located near resistance analyser (108) and reading device (106), which make up measuring device (111). Said at least one sensor (103) with an integrated antenna is configured to determine at least one parameter of solution. Label (102) is configured to provide digital identification associated with said at least one sensor with an integrated antenna, wherein container (101) is located near reading device (106) and resistance analyser (108). Resistance analyser can receive a given frequency range from said at least one sensor (103) with an integrated antenna based on measured complex resistance on a given frequency range.EFFECT: invention is intended for protection of human body from solutions, such as liquid, gaseous and solid solutions, which can be toxic or harmful, due to usage of disposable devices for hazard analysis of solutions.24 cl, 14 dwg

Plant for non-destructive inspection of pipes // 2605391
FIELD: measurement technology.SUBSTANCE: invention can be used for external non-destructive inspection of pipes. Core of invention is that the installation is made in the form of a module for monitoring a pipe wall thickness, a lengthwise defects monitoring module, a transverse defects monitoring module, both equipped with appropriate scanning devices. Wall thickness monitoring module and the lengthwise defects monitoring module are equipped with devices for positioning the scanning devices with sensors relative to the pipe. Device for positioning is made in the form of three housings and fixed in them with the possibility of rotation guide elements in the form of a disc fixed in the housing inclined relative to the pipe axis. Discs are secured in the housings by means of a connecting element, a screw and a spring and are arranged at the inlet and at the outlet of the first two modules. Housings are movably connected to each other with the possibility of simultaneous convergence-divergence relative to the pipe. Discs are made with annular chamfers. One of the annular chamfers are contact surfaces with the pipe and are made with a thermo-hardenable layer. Other annular chamfers provide more compact arrangement of the discs relative to the sensors for reduction of the "dead" zone of scanning. Scanning devices are arranged able to rotate in opposite directions.EFFECT: improving pipes monitoring quality, wider range of monitored pipe diameters without increasing overall dimensions of the plant, as well as higher reliability of the plant operation.1 cl, 7 dwg

Peak offset correction for analyte test strip, used for measuring analyte content // 2605292
FIELD: chemistry.SUBSTANCE: group of inventions relates to determination of concentration of analyte in a biological fluid based on obtained relationships of current with time. Method of determining concentration of analyte in a physiological fluid involves placing a reagent for reaction with analyte in physiological fluid between a first electrode and a second electrode, application of physiological fluid on reagent, transformation of analyte in physiological fluid and excitation of transient current from each of first and second electrodes, determination of peak transient current for each of first and second electrodes, measuring transient current at specified temporal offset from peak of each transient current from each of first and second electrodes, wherein temporal offset for first electrode has a first offset in time from peak of transient current of first electrode, and temporal offset from peak of transient current of second electrode comprises a second offset in time, different from first offset in time, and calculation of concentration of analyte based on measured values of current of first and second electrodes at measurement step. Invention also discloses an additional version of said method and a system for determining analyte concentration in physiological fluid.EFFECT: higher accuracy of analysis.15 cl, 9 dwg

Control device for internal combustion engine // 2603997
FIELD: engines and pumps.SUBSTANCE: present invention relates to a control device for an internal combustion engine. Sensor for determining concentration of oxygen in exhaust gases or in an air-fuel mix with an element of a solid electrolyte, a side electrode of exhaust gases located on one side of the element of a solid electrolyte and being in contact with exhaust gases, an atmospheric side electrode located on the other side of the solid electrolyte element and being in contact with the atmospheric air, and an electric circuit feeding the reference voltage between those electrodes, is located in the outlet pipe of the engine. Sensor for determining concentration of oxygen in exhaust gases or the air-fuel mix has a characteristic, according to which output current (Ip) continues to increase without the field of limit current, when voltage (Vs) applied between the electrodes increases, while the ratio of components in the air-fuel mix is constant. Ratio of components in the air-fuel mix is controlled basing on output current (Ip) of the sensor for determining concentration of oxygen in exhaust gases or the ratio of components in the air-fuel mix.EFFECT: invention provides the possibility of accurate control of components in an air-fuel mix.9 cl, 14 dwg

ethod of determining density of mobile ions in composite media based on liquid crystals // 2603445
FIELD: measuring equipment.SUBSTANCE: invention relates to measurement equipment and can be used for measuring density of mobile ions in composite media based on liquid crystals. Method of determining density of mobile ions is that to an electrically controlled device serially applied are several voltages of an electric field with different amplitude in the form of rectangular pulses. Then, after removing each of the applied voltage waveforms are measured of the charges draining current. Integration results of obtained oscillograms of the current by time are used to calculate by dividing into the volume of medium the density of mobile ions in a LC medium and a dependence of the obtained values of density on the voltage is built. Maximum density, at which the obtained dependence reaches saturation corresponds to the effective value of ions density present in composite media based on liquid crystals.EFFECT: invention provides higher accuracy and a simpler method of determining the effective value of ions density in composite media based on LC.1 cl, 6 dwg

Voltammetric method for quantitative determination of glycyrrhizic acid in pharmaceutical substances // 2603363
FIELD: chemistry.SUBSTANCE: invention relates to analytical chemistry. Method comprises, for 150 s, performing electrochemical concentration of glycyrrhizic acid on surface of a mercury film electrode at electrolysis potential (-1.8) V on a background of 0.01 M potassium chloride with subsequent recording of current-voltage curves with linear potential sweep rate 50 V/s, and glycyrrhizic acid concentration is determined by peak height in range of potentials (-0.2) to (-0.3) V relative to a silver chloride electrode.EFFECT: method is characterised by high sensitivity (1 pg/ml) and rapidness (single-time analysis does not exceed 10-15 minutes).1 cl, 1 ex, 4 tbl
 
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