Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means (G01N27)
G01N Investigating or analysing materials by determining their chemical or physical properties (separating components of materials in general b01d, b01j, b03, b07; apparatus fully provided for in a single other subclass, see the relevant subclass, e.g. b01l; measuring or testing processes other than immunoassay, involving enzymes or micro-organisms c12m, c12q; investigation of foundation soil in situe02d0001000000; monitoring or diagnostic devices for exhaust-gas treatment apparatus f01n0011000000; sensing humidity changes for compensating measurements of other variables or for compensating readings of instruments for variations in humidity, seeg01d; or the relevant subclass for the variable measuredtesting or determining the properties of structures g01m; measuring or investigating electric or magnetic properties of materials g01r; systems in general for determining distance, velocity or presence by use of propagation effects, e.g. doppler effect, propagation time, of reflected or reradiated radio waves, analogous arrangements using other waves g01s; determining sensitivity, graininess, or density of photographic materials g03c0005020000; testing component parts of nuclear reactors g21c0017000000)(84129)
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)
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
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
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
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
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
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
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
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
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
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
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
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
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
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
FIELD: measurement technology.SUBSTANCE: invention can be used in methods for analysis of gaseous media and devices for measuring parameters of gaseous media, for control and determination of physical and chemical parameters of said media. Method of measuring temperature, moisture content and rate of change thereof in sealed container with gaseous medium involves installation in container of analysed objects with time-variable physical and chemical parameters and temperature and humidity sensors, dynamic measurement of parameters of gas medium using said temperature and humidity sensors, conversion of measured analogue signals of sensors into final data type. Before measurement of parameters of gas medium, method includes installing in each difficult to access area of container with analysed objects as measuring instruments combined temperature and humidity sensors and subsequent sealing of compact container with analysed objects and measuring instruments, which is then further placed in protective dismountable container, space of which is filled with additional measuring instruments, and protective container is placed in a restricted climatic zone with specified temperature and humidity conditions. Then, measuring instruments are turned on and dynamic measurement of gas medium is performed both in sealed container with analysed objects, and in protective container, from which measured signals are transmitted to corresponding sockets of an independent measurement-conversion unit (AIPB), and converted signals are transmitted to a PC, where they are compared with critical values. Unlike existing device for measuring temperature and moisture content and rate of change thereof in a sealed container with gaseous medium with analysed objects placed therein, characterised by time-variable physical and chemical parameters, and equipped with measuring instruments, according to invention a sealed container with analysed objects is placed in protective container with measuring instruments, installed in a climatic zone with specified temperature and humidity conditions, each of measuring instruments is equipped with individual switching elements, wherein all switching elements, conducting measured signals from measuring equipment, are assembled into a single line of switching elements and are connected to common connectors (sealed adapters) installed in series in a sealed container with analysed objects and in a protective container, and are connected to corresponding connectors of independent measurement-conversion unit (AIPB).EFFECT: technical result is possibility of insulation against external factors, providing dynamic control of time-varying gas medium of sealed containers with analysed objects, in which there are difficult to access zones for installing measuring equipment, minimising operational process and reduction of labour resources of operators, optimising measurement and control process.2 cl, 1 ex, 1 dwg
FIELD: measuring equipment.SUBSTANCE: invention relates to detection devices used for detection and measurement of content of trace impurities of oxygen and can be used for environmental monitoring. Sensor according to invention comprises a semiconductor base and a substrate. Semiconductor base is made from a polycrystalline film of zinc telluride, doped with gallium antimonide ((ZnTe)0.85(GaSb)0.15), and substrate is an electrode platform of a piezo crystal resonator.EFFECT: invention provides with considerable simplification of manufacturing technology determination of content of oxygen with sensitivity, several times higher than that of existing sensors.1 cl, 3 dwg
FIELD: gas industry.SUBSTANCE: invention relates to the sensor for determination of gas content in two-phase fluid medium flowing in a flow line. Said sensor comprises a cartridge (10) designed to be placed in a flow line, in flow (F) of fluid medium. Cartridge (10) contains multiple measuring electrodes (1-5), which is set in pairs multiple zones (A-D) separating the flow passage of cartridge (10). Sensor additionally contains members (50) and measurement, which are connected to the measuring electrodes (1-5) to control switching of each zone (A-D) of the cartridge (10) between the measurement status and condition of absence of measurement. Members (50) and measuring have the possibility of selective switching state of each of the zones (A-D) independently from each other.EFFECT: present invention enables to accurately determine the local percentage of gas bubbles within specifically preset section.15 cl, 6 dwg
FIELD: measuring equipment.SUBSTANCE: device relates to measurement equipment and can be used in power engineering, metallurgy, chemical industry for determining of hydrogen concentration in gaseous media in wide range of temperatures and pressures. Hydrogen sensor in gaseous media comprises working element, tightly adjacent to sensor housing upper part through the seal. Additional air-tightness is provided with nut. Sensor housing lower part is outlined by insulation, providing close contact with heater, providing working medium temperature conditions supplied to steam-water chamber watertight membrane. Through measuring platinum electrode, tightly adjacent to ceramic sensor lower part, tightly connected with glass ceramic to sensitive element metal housing, disturbance, introduced by measuring flow is transmitted to potential measuring device central core. Reference electrode is located in ceramic sensor inner cavity. Ceramic sensor bottom external part is coated with layer of porous platinum electrode. End of potential measuring device central core extends into reference electrode volume.EFFECT: higher accuracy of hydrogen sensor readings due to enabling ceramic sensor inner cavity tightness and maintaining stable operating temperature on working element sensitive part due to presence of constant reliable heating by means of heater and heat insulation.4 cl, 3 dwg
FIELD: pipes.SUBSTANCE: used for nondestructive inspection of reformer pipes from austenitic steel. Summary of invention is, that reformer pipe from austenitic steel testing method, comprising steps, at which: providing reformer pipe sample from austenitic steel, which must be inspected; selecting one or more testing points on said reformer pipe from austenitic steel; sending two sinusoidal electromagnetic signals having different frequencies F1 and F2, into testing points on reformer pipe from austenitic steel; receiving response signal from said testing point; and analyzing main frequency and intermodulation frequencies of said received response signal, to determine reformer pipe from austenitic steel condition in said testing point.EFFECT: technical result is possibility of detection of very early changes in pipe alloy.20 cl, 6 dwg
FIELD: measuring equipment.SUBSTANCE: invention relates to gas ionization multi-wire chambers, in particular, to drift chambers with thin-walled drift tubes. Device for measuring the location of wires in gas wire chambers in the coordinate system associated with the bearing structure of the chamber includes a radiator of downward radiation and a detector of wire scattered radiation configured to move perpendicular to the wire plane. At that, the radiator is a light source and the light detecting device is a device directly recording coordinates of the wire image in the transmitted or reflected light, for example, a microscope with an electronic eye lens installed on an optical bench and configured to automatically read coordinates.EFFECT: possibility of measuring the location of wires in a transparent or semi-transparent medium.3 cl, 4 dwg
FIELD: measuring equipment.SUBSTANCE: invention relates to gases moisture content measuring equipment. Capacitive humidity sensor has sensitive capacitor-type element consisting of dielectric substrate, lower electrode from corrosion-resistant metal or alloy, upper nano-structured electrode from corrosion-resistant metal or alloy, permeable for moisture vapors, and moisture-sensitive layer having dielectric constant, changing depending on water vapors amount in environment. At that, invention uses preset thickness upper electrode from nano-structured corrosion-resistant metal, permeable for moisture vapors and formed by laser electro-dispersion method, as well as moisture-sensitive layer is high-heat-resistant photosensitive polymer composition based on poly(o-hydroxy amide) - product of 4,4′-diamino-3,3′-dihydroxy diphenylmethane polycondensation with isophthalic acid bichloride, light-sensitive component - naphthoquinone diazide derivative and amide type solvent at following ratio of components, wt%: poly(o-hydroxy amide) 12-15; light-sensitive component 2.4-3; amide solvent - the rest. Obtained textured microporous moisture-sensitive layer is highly hydrophobic and withstands heating to 400 °C in air and 450 °C in inert atmosphere.EFFECT: upper electrode structure ensures unobstructed moisture access to dielectric and has high adhesion to located below dielectric.1 cl, 1 tbl, 4 dwg, 6 ex
FIELD: chemistry.SUBSTANCE: invention relates to detection of substances in a sample, in particular, to ion mobility spectrometers. Detection device comprising an ionisation region, an ion gate comprising two electrodes, an ion modifier comprising two electrodes, a drift chamber and a collector. Ion gate and ion modifier are combined whereby ion gate comprises one of ion modifier electrodes.EFFECT: technical result is minimisation of analysis time.15 cl, 2 dwg
FIELD: machine building.SUBSTANCE: invention can be used for determining softening degree of parts from aluminium alloys. This invention consists in the fact that the method of determining softening degree of parts from aluminium alloys, accompanied by decay of solid solution in aluminium alloys, includes determination of specific electrical conductivity of the controlled material in the softening section, witness samples (steel ingot sections) are additionally subjected to thermal treatment processes, simulating the conditions causing softening of parts with subsequent determining specific electrical conductivity value on steel ingot sections; method also comprises: turning samples of steel ingot sections, which are used for determining mechanical characteristics based on stretching tests results; plotting dependence graphs of samples mechanical properties of specific electrical conductivity; determining approximation equations, which are used for calculating boundary values of specific electrical conductivity, corresponding to allowable lower value of mechanical properties for each specific melting and type of semi-finished product; comparing the value of specific electrical conductivity on parts from aluminium alloy in the section of softening with the obtained calculated values after simulation thermal treatment.EFFECT: technological result is the possibility of determining attenuation of mechanical properties in a dark spot of the aluminium alloy.1 cl, 4 tbl, 3 dwg
FIELD: instrument making.SUBSTANCE: invention relates to a device for detection of solids, in particular explosives or narcotic drugs. Device comprises carrier disc (20), on which multiple screens are disposed with rotation symmetry. Screens in first rotational position (21) are provided with intake channel (42) for ambient air suction through corresponding screen. Screens in second rotational position (22) are provided with first heating element (40) to evaporate solids captured by corresponding screen during intake of particles. First intake channel (43) for drawing of evaporated particles is connected to analyzing device (45). Angular distance between two adjacent screens of carrier disk (20) is even multiple of angle α, which the carrier disk (20) passes through during the transition from one rotational position of the carrier disk (20) to an adjacent rotational position. Carrier disk (20) is structured with rotation symmetry, in such a manner that as the result of rotation of the carrier disk (20) by the angle a, from one rotational position to the next, a switch from a screen to a blind spot (31), or vice versa, so that intake and aspiration channels (42, 43) are closed off by blind spots (31) in every other rotational position. Blind spots (31) of carrier disk (20) between two screens have plug, which is in the shape of the screen, said plugs are made from non-magnetic, preferably austenite, material.EFFECT: higher efficiency of the device, higher degree of loading and efficiency of operation of the used components.13 cl, 5 dwg
FIELD: machine building.SUBSTANCE: test bench comprises an inductor mounted on a portal, a wheel pair rotation drive provided with an interacting with the wheel flanges roll mechanism, a device for application of a magnetic indicator, a teeth recorder, a control unit and a unit of feeding the inductor. Device for application of a magnetic indicator is supplemented with a lifter made as a 3D parallelogram mechanism feeding baths to the controlled wheels. Control unit connected to the teeth recorder output is equipped with pulse counters fixing magnetization cycles of the teeth in parts and the whole wheel and generating signals for complex automation of technological transitions from automatic process of serial magnetization of all teeth by step-by-step turning the wheel pair rotation wire coupled with reciprocating motions of the inductor to automatic lifting of filled with the help of a pump unit with a suspension baths with dipping the rim of rotating controlled gear wheel.EFFECT: provided is higher efficiency and reliability of gear wheels control.10 cl, 4 dwg
FIELD: chemistry.SUBSTANCE: invention can be used to ionize molecules. Invention consists in that an electrical ionization source includes a wire that is looped between electrical contacts. The wire is used to form a corona responsive to application of voltage between the wire and the walls of an ionization chamber. Corona can form when a sufficient voltage is applied between the wire and the walls. Difference in electrical potential between the wire and a wall forming an ionization chamber, in which wire is contained, can be used to draw the ions away from the wire. In embodiments, the wire can be heated to reduce the voltage used to strike the corona.EFFECT: technical result is possibility of ionisation of molecules from the samples of interest to identify molecules on the basis of ions.24 cl, 6 dwg
FIELD: chemistry.SUBSTANCE: invention relates to synthesis of island metallic catalysts and carbon nano-objects and can be used in industry for production of nano-objects and nano-structured films. Method of forming carbon nano-objects on glass-ceramic substrates involves placing glass-ceramic reference sample together with glass-ceramic working substrates in spattering zone, formation on said working substrates and a reference sample of island structure of metal film of a catalyst with monitoring of electrophysical parameters of formed island structure of metal catalyst by measuring capacitance of island structure of catalyst on reference sample, termination of sputtering of said catalyst when peak value of capacitance of formed structure of metal catalyst on glass-ceramic reference sample is achieved, sputtering carbon on island structure of metal catalyst formed on glass-ceramic surfaces of reference sample and working substrates, controlling resistance of nanostructure, consisting of formed carbon nano-objects on glass-ceramic reference sample and termination of sputtering carbon when resistance of formed structure of carbon nano-objects, synthesised on surface of island structure of catalyst, falls to a value where said structure of catalyst is closed by said carbon Insula nano-objects.EFFECT: providing formation of island film catalyst on glass-ceramic substrates for subsequent synthesis of carbon nano-objects on its surface.1 cl, 6 dwg, 2 tbl
FIELD: measurement technology.SUBSTANCE: invention can be used for magnetic flaw detection. Subject of invention is that induction transducer comprises a housing, vibration drive installed therein, a rod mechanically connected thereto with one end and an inductance coil placed at other end of rod, where vibration drive is made in form of bimorph piezoelectric element, having shape of rectangular plate, axis of symmetry of which coincides with axis of rod, one side plate is cantilever-fixed in housing, and its opposite side is mechanically connected with rod.EFFECT: possibility of increasing efficiency of detection of defects.1 cl, 3 dwg
FIELD: electrical engineering.SUBSTANCE: invention relates to a device for application of electric field, a method of its use, as well as a method of its production. Device for application of electric field to a conducting volume comprises an electric field applying assembly, configured to generate an electric field, having a profile of a discrete electric field; conducting volume; electrical interface region provided between conducting volume and electric field applying assembly and arranged so that discrete electric field is applied to electric boundary region by electric field applying assembly in a place, separated from conducting volume. Electric boundary region comprises ion-conducting material, arranged tightly to conducting volume and in contacting with it, and discrete electric field applied by electric field applying assembly is smoothed by electric boundary region so that electric field profile established within conducting volume is substantially continuous.EFFECT: technical result is possibility of smoothing electric fields applied to microfluid devices or "laboratory on chip" (LOC) devices.39 cl, 22 dwg
FIELD: measuring equipment.SUBSTANCE: sensor (100) of exhaust gases is configured to measure oxygen concentration or ratio of components in air-fuel mix in exhaust gases of internal combustion engine. Waste gas sensor comprises sensitive element (10) and glass film coating (20). Sensitive element is configured to measure oxygen concentration or ratio of components in air-fuel mix in waste gas sensor. Glass film coating (20) is formed, at least, on the part of the surface of the sensitive element and is able to absorb a component with Mn contained in exhaust gases at the temperature of 700 °C. Internal combustion engine uses fuel with Mn concentration of more than 20 ppm.EFFECT: invention enables reduction of sensor signal delay by preventing oxygen accumulation mode.5 cl, 9 dwg, 2 tbl
FIELD: medicine.SUBSTANCE: on the third day following an injury, suffered individual's blood is analysed to determine a total index of necrotic DNA-comets and DNA single- and double-strand breaks. If the total index is less than 29%, infectious complications are expected to develop on the day 5-7 following the injury.EFFECT: invention enables the high-accuracy prediction of infectious complications that makes it possible to select an appropriate therapeutic approach and reduce the number of unfavourable outcomes.1 tbl, 2 ex
FIELD: pharmaceutics.SUBSTANCE: invention refers to pharmaceutics, in particular, to methods of quantitative analysis of drugs. Method relates to determination of rifabutin in sample with unknown content of rifabutin and, optionally, other components (analyzed sample), wherein using: (a) device for capillary zone electrophoresis, equipped with thermostatic chamber for capillary, capillary, optical detector, facilities for measurement results recording, sample input facilities; (b) electrolyte; in which capillary is filled with electrolyte (b), analyzed sample is introduced into capillary by means of sample input, electrophoretogram is measured and recorded (absorption value or change depending on electrophoresis performance time) by optical detector, characterized by that content of rifabutin in it and, optionally, other components in analyzed sample is defined by relationship area of rifabutin peaks and, optionally, other components on electrophoretogram obtained under same conditions, using solutions with previously known concentrations of rifabutin and, optionally, other components of analyzed samples.EFFECT: method of capillary zone electrophoresis allows simultaneous quantitative determination of both rifabutin, and components such as albumin and amino acids, in wide range of concentrations of latter, wherein range of linearity of calibration curve is much higher than that of previously used methods based on HPLC, that reduces number of measurements of standard solutions when constructing calibration curve, avoiding application of complex mathematical models when processing measurement results, no need in strong diluted samples.10 cl, 3 dwg, 2 tbl, 5 ex
FIELD: instrument making.SUBSTANCE: invention relates to analytical instrument-making. Electrochemical (1) oxygen sensor is installed in reaction chamber (3). Selective membrane (4) replaces part of wall of reaction chamber (3). Part of reaction chamber (3) is filled with sorbent (5). Weight of sorbent corresponds to a condition, which takes into account a relationship between volume of reaction chamber (3), density of sorbent (5), service life of sensor, temperature of reaction chamber (3), molar weight of sorbent (5) and molar fraction of water content in it, volume flow rate of water vapour, exiting reaction chamber, partial pressure of water vapour for sorbent (5) at specified temperature in reaction chamber (3) and universal gas constant.EFFECT: invention provides high accuracy of measuring concentration of hydrogen and improvement of ergonomic characteristics of hydrogen sensor.1 cl, 2 dwg
FIELD: measuring equipment.SUBSTANCE: invention relates to express analysis of liquid and solid food and nonfood products, waste, natural and drinking water, loose and amorphous materials, for which it is necessary to quickly and without native state sample preparation, to assess the property of the dominant state, for example, the presence of artificial additives, deviation from normal state during storage, intensity of pathogenic conditions (decay) if contaminated by anthropogenous, including toxic, compounds in equilibrium gas phase over small volume of sample, including in field conditions and “on-site”. Mobile device for rapid assessment of liquid and solid samples, amorphous samples includes a housing accommodating a microprocessor and power supply elements. It can be connected to power supply. There is a power indicator on the front panel of the housing, display for displaying measurement data, including instructions “start, finish”, a detection cell with tightly closing cover on the upper panel of the housing. In the lower part of the cell there is a plate with seats for two detachable measuring elements, and a tightly closing cover with a top branch pipe to feed a gas sample. Near the detection cell there is an operation indicator for measuring elements, which controls the system of measurement and data processing. Two measurement elements are piezosensors are with different coatings on electrodes; wherein the piezosensors have a common algorithm of processing their responses.EFFECT: higher mobility and compactness of device due to minimum sizes of the housing with display and microprocessor, detection cell, rapid receipt of information on content and ratio of content of various volatile components in equilibrium gas phase, high reliability of detecting volatile compounds.1 cl, 2 dwg
FIELD: measuring equipment.SUBSTANCE: invention relates to measurement equipment and is intended mainly for oceanographic tasks. Comparison electrode according to the invention includes a housing with an electrolytic key filled with an electrolyte connected with the analyzed medium through the key, a potential-forming cell positioned in housing, the output of which is the device output, and an elastic electrolytic chamber filled with the electrolyte and connected with the housing electrolyte. Herewith the elastic electrolytic chamber has a given volume and there is a load installed on it. Electrode additionally contains a conditioning capillary, which is installed on the way of the electrolyte flow from the elastic chamber into the analyzed medium.EFFECT: invention provides passive stabilization of consumption of the electrolyte flow through the key of the comparison electrode at a preset speed of the electrolyte.1 cl, 3 dwg
FIELD: medicine.SUBSTANCE: group of inventions refers to medicine in relation to snap analysis. Device for conductometric non-invasive blood sugar measurement includes power supply, connected to the processor equipped with a liquid crystal display, tray for dose of patient's saliva and for reagent, as which used primary conglomerate of mono reagent Glucose-UV-Novo or Glucose-Novo, at that for mixing of a dose of saliva and reagent the fixing platform is entered, and contact tray is executed with possibility of installation in fixing platform at measurement, at that in the contact tray, in its base and on inner opposite walls, there are executed electric contacts, and in the fixing platform, on it opposite inner walls, there are implemented electric contacts providing connection with external electrical leads of contact tray, and electric contacts of the fixing platform are connected to the processor. Also two versions of the conductometric method for non-invasive blood sugar measurement are presented with use of the above device.EFFECT: thus is reached the lack of need of blood sampling, as well as simplification and reliability of analysis.12 cl, 6 dwg
FIELD: electrochemistry.SUBSTANCE: this invention proposes electrochemical modules for determining content of an analyte in a biological fluid sample. Electrochemical module according to the invention comprises a first substrate with the first conducting layer on it, forming the first node, note here that said assy has the first width and the first length, the second substrate with the second conducting layer on it, forming the second assy, wherein said assy has second width smaller than the first width, and the second length, which is the same as the first length, the first and the second separating gaskets, located between the first and second assies and supporting said assemblies; chamber formed between the first and the second assies and configured to receive fluid sample, at that, chamber contains a reagent, capable of reacting with analitom contained in liquid sample; and the third separating gasket, which is adjacent to the first or the second separating gasket, at that the surface of the third separation gasket has a conducting layer in current-conducting contact with the second conducting layer. Also disclosed is the second version of the electrochemical module, in which the first conducting layer comprises the first and the second parts arranged with a gap between them, at that, the third separating gasket is in contact with at least part of the gap and is in the current-conducting contact with the first and the second conducting layers.EFFECT: invention enables to form smaller sensors with reduced cost.14 cl, 6 dwg
FIELD: control equipment.SUBSTANCE: invention can be used for control of electrical conductivity and correlating with it temperature value of sheet inner layers, for example, made of refined copper - copper crystallizer case by measuring electrical conductivity of copper inner layers. According to invention, a method for monitoring electroconductivity changes of non-magnetic metal inner layers consists in using false eddy-current converter, at the exciting coil of which current created by generator circulates, and its measuring coil signal is processed in the processing unit to output of which electroconductivity indicator is connected, at that, periodic pulsed current circulates in exciting coil in the form of meander with period, selected in a way, that during half period electromagnetic transient processes are being ended, the maximum value of ΔsMax differential in relation to an object with constant value of electroconductivity of magnetic flux is determined and the value of time interval tMax of reaching said maximum, by these values using calibration curves on the plane with axes ΔsMax-tMax, the value of electroconductivity change and coordinates of an area are measured, where there are these changes, wherein the calibration curves on the plane of state are pre-builded by modelling for the assumed laws of electrical conductivity variation, and they are stored in memory of the processing unit. Proposed method and device allow to determine electrical conductivity inside the metal sheet and to determine coordinates of electrical conductivity change.EFFECT: invention enables a possibility of control of parameters during industrial production - melting of the metal and process of its cooling, possibility of determining electrical conductivity (temperature) in the area of the metal removed layers (i/e walls of crystallizer contacting with liquid metal), determination of electrical conductivity change area, i/e distribution of electrical conductivity (temperature) along the metal wall (crystallizer case).2 cl, 6 dwg
FIELD: measuring equipment; instrumentation.SUBSTANCE: invention relates to production of means of identifying impurities of gases and determining concentration of gases in air. Method of making sensitive elements of sensors of gas concentration according to invention involves application of dielectric film on face side of silicon substrate, forming a film structure of sensitive elements and creation of thin dielectric membranes by anisotropic etching of silicon substrate on back side, conducted in two steps, first before application of dielectric film, and second after all operations for creating structure of sensitive elements with preliminary protection against etchant front side of substrate, wherein first step of etching is carried out in aqueous solution of a mixture of ethylene diamine with pyrocatechol, and then in aqueous solution of potassium hydroxide, and second step is performed only in aqueous solution of a mixture of ethylene diamine with pyrocatechol.EFFECT: invention enables to obtain thin (1-5 mcm) dielectric membranes throughout substrate area simultaneously and higher yield of sensitive elements in production process thereof.1 cl, 4 dwg
FIELD: mechanisms.SUBSTANCE: invention relates to mechanization and automation of technological procedures during nondestructive inspection of objects of industrial production or transport, for example, welds of railway tanks and fasteners (clamps) thereof. Subject: device has two rod supports, left and right ones. Supports are connected with system of double planks (top and bottom ones), forming rectangle with hinged angles in its initial state. Each support has boot at its bottom in form of electromagnet. Upper part of cylindrical boot is toothed rim. Above each boot, rigidly with support rod, drives are fixed, including therein electric motor, worm gear, and pinion. On upper planks symmetrically to each other there are two traction electromagnets. On lower planks vertical anchor of magnetically soft steel is installed. Upper part of anchor is located between poles of tractive electromagnets with equal gaps on both sides. At bottom of lower plates induction or another sensor is attached, used for scanning controlled object surface.EFFECT: technical result is upgraded running properties of device.1 cl, 2 dwg
FIELD: pipes.SUBSTANCE: invention relates to monitoring the state of pipeline walls without their opening. Essence: alternating current is passed through the pipeline in longitudinal direction. Alternating current generated by magnetic field is measured at constant distance from the inner pipe wall in its inner cavity moving along with stops for the time of full turn around the pipe axis simultaneously at several points arranged on lengthwise pipe sections in turning about its axis. According to measurement of the average arithmetic value of magnetic field induction in each point of interruption of longitudinal movement. Wall thickness variation in points of the cylindrical surface of the pipe is installed as a function of direct proportionality from the ratio of the average value of magnetic field induction inside pipeline each point of interruption of longitudinal movement to its value in the measurement points with coefficient of proportionality equal to the predetermined value of thickness of intact pipe section.EFFECT: technical result is upgraded accuracy, possibility of control from inside the pipe without making disturbances in process of measuring corrosion and sludge deposits and other defects.2 cl, 2 dwg
FIELD: chemistry.SUBSTANCE: group of inventions relates to detection of analytes in biological fluids. Method of determining capacitance of an electrochemical biosensor test cell of a test strip comprises steps of: depositing a fluid sample in electrochemical test cell; applying an oscillating signal of a predetermined frequency to electrochemical test cell; determining a phase angle between an output signal and oscillating signal from electrochemical test cell; measuring an amplitude of output signal from electrochemical test cell with confirmation of first sampling time interval for measurement of output signal based on predetermined sampling rate at output signal cycle with predetermined frequency and produce output signal sampling from cell with a second time sampling interval, different from first time sampling interval so that amplitude of each selected output signal is measured at end of each of second time sampling interval instead of first time interval; converting measured amplitude into a complex impedance of electrochemical test cell based on oscillating signal, phase angle and electrical resistance between test cell and connectors; and deriving a capacitance of electrochemical test cell based on complex impedance and predetermined frequency of electrochemical test cell, with evaluation of output signal to determine duration of time interval between each step change of output signal and installation of first time sampling interval, which is equal to time duration. Invention also discloses a method and a system for evaluating state of electrochemical test strip.EFFECT: higher accuracy and efficiency of analysis.29 cl, 11 dwg, 1 tbl
FIELD: biology.SUBSTANCE: invention relates to method of determining integral antioxidant/oxidant activity of organic condensed media, including biological ones. Method involves preparation of initial solution containing a mediator system consisting of reagents, including element in the oxidised and reduced form, or compounds, which form reversible redox pair, and evaluation of antioxidant/oxidant activity in electrochemical parameters of analysed object, introduced to initial solution. At that, before introduction into initial solution the analysed object is dispersed in water solution of ethanol in ratio 1:0.8…1.2 volume to particle size of not more than 0.5 mqm. Water-alcohol solution is prepared with ratio of 1:1 by volume. Storage time of prepared sample is not more than 30 minutes. Electrochemical parameter of evaluation of antioxidant/oxidant activity is change in redox potential after introduction of mixture of analysed liquid in aqueous-alcoholic solution in buffer solution containing mediator system.EFFECT: use of present method enables higher reliability and accuracy of obtained information and reduced analysis time, expand number of analysed objects.4 cl, 10 ex, 5 tbl
FIELD: measuring equipment.SUBSTANCE: invention can be used for selectively sensing of concentration of a target gas in polluted ambient air. The invention consists in the fact thatmethod of selective measurement of concentration of a target gas in polluted ambient air comprising the steps of: providing the sensor of the target gas which is sensitive to target gas; providing the first gas flow derived from ambient air, the target gas being substantially removed from the first gas flow; providing a second gas flow derived from the ambient air, substantially, containing the same concentration of target gas that and ambient air; exposing the target gas sensor to the first gas flow, during the first time interval and obtaining from the target gas sensor a first sensor signal (Smf); exposing the target gas sensor to the second gas flow, during the second time interval, not overlapped with the first time interval, and obtain a second output signal (Smu); calculation of difference (SΔ) between first and second output signals; calculation of concentration of target gas from the calculated difference (SΔ) signal.EFFECT: technical result is design of a target sensor with small size, low power requirements, minimal maintenance requirements over an operational period of at least several years, as well a combination of high sensitivity and high selectivity with respect to a particular target gas or target class of gases.15 cl, 14 dwg
FIELD: physics.SUBSTANCE: invention can be used for ultrasound diagnosis quality of crystalline and electric insulating materials and connections. Invention summary consists in fact that in tested material electromagnetic oscillations are excited, tangent of dielectric loss angle tgδ is measured, based on which degree of material readiness is determined, wherein tangent of dielectric loss angle amplitude-frequency characteristic is taken both without action of ultrasonic oscillations and under their impact, when frequency bands of electric and ultrasonic oscillations coincide, as result, in both cases tangent of dielectric loss angle amplitude-frequency characteristic are taken, state of material or adhesive joint is determined from results of comparing amplitude and displacement of tgδ maxima by frequency relative to reference value, wherein displacement by more than 50 kHz indicates unsuitability of crystalline and electric insulating materials or unavailability of adhesive joint.EFFECT: possibility of designing rapid test method of controlling quality of crystalline and electric insulating materials and connections.1 cl, 4 dwg
FIELD: oil industry.
SUBSTANCE: invention can be used for control of technical state of oil and gas wells. Present invention consists in that method of determining corrosion of casing strings in producing wells includes measurement of thickness of casing string in well bore by pulse electromagnetic flaw detection, additionally recording amplitude of low-frequency acoustic noise at which are selected intervals of behind-casing flows of liquid, in detected intervals of flows at low values of total EMF of pulses of magnetic permeability and electrical conductivity of casing string determining its thickness and by comparing it with thickness of neighbouring non-overflow interval defined based on absence of acoustic noise, wherein thickness of casing string is lowered only due to corrosion of its inner wall based on difference between said thicknesses corrosion is evaluated on outer side of column.
EFFECT: technological outcome is possibility of determining external corrosion.
1 cl, 2 dwg
FIELD: measuring equipment.
SUBSTANCE: invention relates to measurements for diagnostic purposes. Sensor unit for diagnostic measurements, arranged at body surface, includes base, having a recess in which is mounted a piezoelectric element of pressure sensor. Unit also includes a flexible membrane installed on base and overlapping said recess. To membrane from outer side first and second electrodes are attached. First electrode is placed opposite recess to move together with membrane. Around first electrode there is a second fixed electrode. Between first electrode and piezoelectric element there is a central support. First and second electrodes are installed with possibility of contact with skin body surface, wherein first and second electrodes are connected electric outputs of sensor for measuring impedance. Higher stability of sensors with increase in their sensitivity.
EFFECT: reduced dimensions of sensor unit.
11 cl, 7 dwg
FIELD: measuring equipment.
SUBSTANCE: invention relates to measurement equipment and can be used for monitoring of microstructure of metal target. Embodiments of present invention provide electromagnetic sensor (400) for detecting a microstructure of a metal target, comprising magnetic device (410, 420) for providing an excitation magnetic field; magnetometer (430) for detecting a resultant magnetic field induced in a metal target; and a calibration circuit (450) for generating a calibration magnetic field for calibrating electromagnetic sensor. Calibration magnetic field is generated by an electrical current induced in calibration circuit by excitation magnetic field.
EFFECT: technical result is increased sensitivity of sensor due to elimination of distortion of its readings caused by interference of various nature.
26 cl, 10 dwg
FIELD: gas industry.
SUBSTANCE: invention can be used for gas analysis of combustible gases and vapors. This invention consists in the fact that microchip of planar thermo catalytic sensor of combustible gases and vapours consists of common, for operating and comparative sensitive elements, porous substrate from anodic aluminium oxide with platinum thin-film configured coating, parts of which are located on opposite sides of substrate and are made in form of meander, serve as micro heaters-meters and heating of microchip to operating temperature and differential measurement of output signal. At that, sizes of micro heaters-measuring devices are restricted to values, whereat film heat removal mode is ensured.
EFFECT: technical effect: improved parameters of sensitive elements and characteristics of sensor.
13 cl, 1 tbl, 5 dwg
FIELD: metal processing.
SUBSTANCE: invention can be used for control of steel sheet. Present invention consists in that device for controlling steel sheet contains magnetooptical element capable of determining optical characteristics of magnetic domain structure of steel sheet, light source for irradiating the magnetooptical element with linearly polarised light, detector for detecting linearly polarised light with polarisation plane, rotating in accordance with magnetic domain structure of steel sheet, which is transmitted magnetooptical element, and drive mechanism for triggering at least magnetooptical element to actuate contact of steel sheet and magnetooptical element, as well as separating them from each other.
EFFECT: technical result is higher output of product by visual observation and checking magnetic domain structure of steel sheet directly after grinding process of magnetic domain.
15 cl, 10 dwg