20 results about "Magnetic testing" patented technology

A high and low temperature test device used in a non-magnetic environment comprises an intelligent temperature controller and is characterized in that the intelligent temperature controller is connected with a liquid inlet and a liquid outlet of a non-magnetic test box through non-magnetic rubber pipes; a temperature sensor is arranged in the non-magnetic test box; the temperature sensor is in signal connection with the intelligent temperature controller; a heat-conducting medium circulates in a closed circulating system, and heating / cooling is performed in a heat conduction manner, so that accurate temperature control on a tested product in a non-magnetic environment is realized, a temperature change rule in an atmospheric environment or other specific scenes is accurately simulated, and uniformity, stability and quick response of temperature control are ensured; and the high and low temperature test device has the advantages of fast temperature change response speed and high temperature zone uniformity, does not generate an interference magnetic field in a working area in the working process, and ensures the normal work of a magnetic test instrument.

The invention relates to a radial shimming coil of a hollow cylindrical working area, which is characterized in that decoupling is carried out through a coupling effect of a magnetic shielding barrel and a coil magnetic field, a radial magnetic field component analytic function of the coil at any point in space is obtained through derivation based on a magnetic field superposition principle, and iterative solution is carried out by adopting a particle swarm optimization algorithm; the optimal coil design parameters meeting the target magnetic field distribution are obtained; a magnetic field with magnetic lines in a radial diverging shape and uniform size is formed in a hollow cylindrical working area and is used for magnetic compensation and probe calibration of magnetometers distributed in an annular array in the muscle magnetism and leg magnetism testing process, and the matching degree of the shimming effect and the sensitive direction of a sensor is improved.

The application discloses a kind of based on bevel gear's non-magnetic testing device and testing method, including driving mechanism, first rotating shaft, first bevel gear, second bevel gear, second rotating shaft, first bevel gear is fixedly connected with first rotating shaft, driving mechanism drives first rotating shaft to drive first bevel gear rotation, first bevel gear is rotated to second bevel gear, so that second bevel gear rotates around second rotating shaft;Second bevel gear is used as object platform, for carrying measured object, by setting the tooth engagement angle of first bevel gear, second bevel gear, in the case where first rotating shaft is fixed, so that measured object carried on second rotating shaft obtains the measurement angle of space arbitrary direction.The application uses a bevel gear to carry measured object, so that the rotating shaft of rotary table and the rotating shaft of driving mechanism are at any angle, and the structure is compact, improves use flexibility, and is suitable for only a small amount of opening exists closed magnetic shielding space use.

This invention relates to the technical field of magnetic testing and analysis of boiler water-cooled tube sidewalls, specifically providing a boiler water-cooled tube sidewall inspection device. The device includes a housing assembly, a magnetic module, an image acquisition module, a magnetic powder circulation mechanism, and a drive mechanism. The magnetic powder circulation mechanism includes an upper pulley, a lower pulley, and a rear guide pulley, each mounted on a wire-threading tube. An annular magnetic tape is mounted on the outer side, and the tape circulates. An internal upper powder-removing mechanism is located inside, and a lower front powder-applying mechanism is located at the bottom. The bottom of the powder-removing mechanism and the top of the powder-applying mechanism are connected by a powder-guiding tube. The upper part of the annular magnetic tape passes through the powder-removing mechanism for powder removal, and the front part of the tape adheres to the front of the powder-applying mechanism for powder application. The image acquisition module faces the inner surface of the annular magnetic tape. This invention can adaptively adjust the machine's movement speed, quickly inspecting non-critical areas and repeatedly testing at low speeds in critical areas, improving work efficiency and inspection accuracy.

The utility model relates to the technical field of unsaturated soil strength and deformation characteristic testing, and discloses a soil triaxial nuclear magnetic combined testing device which comprises a base frame, a pressure chamber structure, a pressurizing structure and a nuclear magnetic tester, the pressure chamber structure is installed on the base frame, and a pressure chamber used for containing a soil sample to be detected is formed in the pressure chamber structure; the pressurizing structure is mounted on the base frame, and the output end of the pressurizing structure is inserted into the pressure chamber to apply axial pressure to the to-be-detected soil sample; the pressure chamber structure is sleeved with the nuclear magnetic tester, and the detection end of the nuclear magnetic tester right faces the pressure chamber. According to the structure, the nuclear magnetic tester, the pressure chamber structure, the pressurization structure and the nuclear magnetic tester are integrated, the sealing performance is better, real-time online detection is facilitated, and the influence of the pressurization structure on nuclear magnetic detection is reduced. And the diameter of the pressure chamber structure is reduced, so that the pressure chamber structure can be placed in a nuclear magnetism tester, and both nuclear magnetism test and triaxial experiment are met.

This invention provides a magnetic testing device. The device includes: a mounting frame; and a sample fixing structure mounted on the mounting frame. The sample fixing structure includes a sample rod and a sample holder, connected to the sample rod. The sample holder includes a main body and a clamping structure mounted on the main body. The clamping structure includes at least two clamping members arranged opposite each other along a first direction, forming a sample clamping space between the at least two clamping members. This invention solves the problem that when using existing sample fixing structures for magnetic testing, the sample easily slips off the glass slide when the sample holder resonates with the sample fixing structure.

The invention discloses a CO2 flooding asphaltene blocking degree quantitative calculation method, and relates to the technical field of oil and gas field development. According to the technical scheme, the method comprises the following steps: executing on-line core in-situ condition nuclear magnetic testing: preparing a solution for saturating a core, preparing a saturated rock sample, determining a static pore throat nuclear magnetic T2 spectrum, determining a CO2 displacement process nuclear magnetic T2 spectrum, and determining a CO2 displacement post-nuclear magnetic T2 spectrum; the permeability damage rate and the porosity damage rate of the rock core are calculated by respectively obtaining static pore throat nuclear magnetic T2 spectrums and CO2 displacement process nuclear magnetic T2 spectrums of different rock cores, so that the CO2 displacement asphaltene blockage index is obtained. The method has the beneficial effects that the core in-situ condition on-line nuclear magnetic experiment is adopted, the micro-pore structure characteristics of the reservoir core are classified and researched, the CO2 displacement micro-dynamic process is observed by using the representative real core, the asphaltene and wax blocking degree of each stage can be quantitatively analyzed, the observation and operation are simple, the cost is low, and the method is suitable for large-scale popularization and application. And the support is provided for improving the recovery efficiency and reducing the residual oil distribution in the later-stage work of the oil field.

The invention provides a method and a device for quantitatively calculating the total organic carbon content of an oil reservoir and identifying a dessert section of the oil reservoir. The method comprises the following steps: taking a plunger rock sample and parallel samples with the same depth; carrying out T1-T2 two-dimensional nuclear magnetic testing on the sample feeding state and different drying states of the plunger rock sample; determining a distribution range of the organic holes in the target block in the T1-T2 two-dimensional spectrum and a corresponding identification standard; according to the standard, the organic pore volume of all plunger samples in the optimal state two-dimensional nuclear magnetic experiment data is counted, and an empirical equation between the two is determined by combining TOC experiment results of parallel samples; and for two-dimensional nuclear magnetic logging of a new well in a target block, calculating the organic pore volume by adopting the standard, and further calculating the total organic carbon content TOC of the shale oil reservoir by adopting the empirical equation. The curve and a geometric mean curve of a transverse relaxation T2 spectrum of two-dimensional nuclear magnetic logging are comprehensively analyzed, sweet spot sections which are good in oiliness and beneficial to output can be rapidly recognized, and a decision basis is provided for optimization of an oil testing scheme.

The application provides a satellite dynamic magnetic compensation method and system, which comprises the following steps: performing magnetic test on the satellite to obtain the magnetic moment of the satellite under each working condition; determining the dynamic magnetic compensation magnetic moment required by the working condition of the load, so that the magnetic moment of the working condition of the load after compensation is within the interval formed by the magnetic moments under other working conditions; calculating the dynamic magnetic compensation loop area according to the dynamic magnetic compensation magnetic moment and the load power supply current under the working condition of the load, and determining the loop current direction; winding the current loop according to the loop area and the current direction requirement according to the positive line or the negative line of the load power supply cable to form the dynamic magnetic compensation loop; performing magnetic test on the satellite to confirm the dynamic magnetic compensation effect. The application solves the problem that the dynamic magnetic moment of the satellite during the intermittent work of the load cannot be effectively compensated when the satellite is statically compensated by using permanent magnetic material. The application does not need to additionally configure active magnetic compensation equipment on the satellite, and has the advantages of simplicity, economy and effective dynamic compensation of the magnetic moment during the work of the load.

The invention provides a three-dimensional magnetic field coil design method suitable for magnetic compensation of a brain magnetic test area. The method comprises the following steps: S1, constructing an analytical model cylindrical coordinate system in the brain magnetic test area; s2, constructing a magnetic field analytical equation; s3, linearly superposing the barrel bottom fan-shaped coil pair and the barrel side saddle-shaped coil to form a radial coil based on a magnetic field analytical equation, and superposing the barrel side annular coil pair to form an axial coil, then optimizing the structural parameters of the radial coil and the axial coil based on an intelligent optimization algorithm, and constructing to obtain three groups of shimming coils and five groups of mutually independent linear gradient coils; and S4, describing interference magnetic field distribution in the brain magnetic test area through a vector spherical harmonic function, and adjusting the magnitude of current flowing in the coil so as to be matched with the interference magnetic field distribution. The method has the beneficial effects that the compensation coil capable of being highly matched with the magnetic field distribution trend of the brain magnetic test area under the interference condition can be designed, and the residual magnetic field in the single-end-opened cylindrical alloy barrel is accurately compensated.

Device (10) for magnetically testing a chain (11) with several chain links (12), wherein the device (10) can be arranged on an axial section (21) of the chain (11) and is movable relative to the chain (11) or conversely the chain (11) is movable relative to the device (10) in the longitudinal direction (45a) of the chain (11), comprising: - a magnet arrangement (20) with several magnets which are configured to form a magnetic field (22) in the axial section (21), preferably in the longitudinal direction (45a) of the chain (11); - a guide device (19) for guiding the chain (11); - a sensor arrangement (24) with a plurality of magnetic field sensors (25) which are arranged in a sensor area (43) in the axial section (21) on a line (26) encircling the chain (11);- a length measuring device (27) configured to determine the relative path length (33) between the sensor arrangement (24) and the chain (11), wherein the length measuring device (27) has several magnetic field sensors (53) arranged longitudinally (45a) to the chain (11), which are configured to detect relative movements between the device (10) and the chain (11); and - an evaluation unit (30) configured to receive measurement data (31) from the magnetic field sensors (25), to assign these data to a circumferential position (32) and the detected path length (33) with spatial resolution, and to detect defects (34) in the chain (11) in the spatially resolved measurement data (31).

A method for identifying indications in an object via non-destructive testing using inspection equipment comprising a probe is described. The method includes: recording test data corresponding to a signal measurement acquired by the probe; processing the test data using a first analysis machine learning algorithm trained to output a list of detected landmarks; processing the list of detected landmarks to identify regions in the object based on the landmarks; processing the test data and the identified regions using a second analysis machine learning algorithm to output a list of detected indications; processing the list of indications to automatically classify each indication according to one of a plurality of predefined indication types; and outputting the classified indications in a report specifying positions of the classified indications in the object. A corresponding system and non-transitory computer-readable medium are also described.

The invention discloses a carbonate rock gas reservoir water invasion simulation evaluation method and device. The water invasion simulation evaluation method comprises the steps that after the two ends of a rock core are plugged, nuclear magnetic testing is carried out under the preset temperature and pressure conditions, and a T2 spectrogram and a one-dimensional frequency coding signal in the initial state are obtained; removing the plugs at the two ends of the rock core, and carrying out nuclear magnetic test under the conditions of preset temperature and pressure to obtain a T2 spectrogram and a one-dimensional frequency coding signal measured in a saturated gas state; setting return pressure as the set core pressure, displacing displacement fluid in a high-pressure container to the core, and performing nuclear magnetic test according to a preset sampling interval to obtain T2 spectrograms and one-dimensional frequency coding signals measured at different water invasion moments until the outlet does not produce gas any more; and determining the intruding water quantity and water invasion proportion of pores with different sizes in the initial saturated gas state and different water invasion moments, the water invasion degrees in the initial saturated gas state and different water invasion moments, and the intruding water quantity and water invasion proportion of different rock core positions.

This invention relates to a satellite magnetic stability control method for on-orbit operating mode switching, belonging to the field of satellite magnetic stability control; it includes the following steps: Step 1, magnetic design of individual equipment; Step 2, measurement of magnetic moment change of individual equipment using the method of measuring the magnetic moment after demagnetization under zero magnetic field; Step 3, magnetic testing and magnetic compensation calibration of each individual equipment under each satellite operating mode; by reducing the magnetic moment change of individual equipment during satellite operating mode switching, the magnetic stability of the entire satellite is ensured during operating mode switching, so that the magnetic moment change of the entire satellite is minimized, thereby reducing the impact of satellite operating mode switching on in-situ magnetic field measurement tasks; this invention has the advantages of good control effect and high control accuracy for satellite magnetic control.

The invention discloses a device, a controller and a method for determining rock breakthrough pressure, and the device comprises a pressure difference generation device which is used for providing injection pressure difference for injection fluid; the core holder is used for placing a to-be-tested core with saturated formation water and heating the to-be-tested core to the formation temperature; the confining pressure pump is used for providing the required confining pressure for the clamping device to serve as formation pressure; the nuclear magnetic resonance testing device is used for performing nuclear magnetic testing on the core of the saturated formation water to obtain the water saturation of the core; and the controller is used for controlling each component to work so as to obtain the water saturation of the rock core when the operation of injecting the non-wetting phase fluid into the rock core to be measured is executed under the injection pressure difference of different periods. The rock breakthrough pressure can be efficiently and accurately determined based on the on-line fluid saturation test.

The utility model relates to the technical field of winding machines, in particular to a three-hook needle type winding machine suitable for a small-sized annular magnetic ring, and the magnetic performance test of a material is an important means for characterizing the material in different test environments. The method mainly comprises direct-current magnetic performance testing, alternating-current magnetic performance testing, material residual magnetism testing, material magnetic noise testing, material shielding coefficient testing and the like. Before direct-current and alternating-current magnetic performance tests are carried out, copper wires of different specifications need to be wound on a small annular sample. At present, the process is mainly completed manually, that is, an operator manually winds copper wires of two specifications for the front and back of a sample. In order to solve the problems that the consumed time is long, the quality of a wound coil has large randomness, and the consistency and reliability of a test result are difficult to guarantee, the three-crochet-needle type winding machine suitable for the small annular magnetic ring provided by the utility model is characterized in that a three-crochet-needle winding mechanism comprises an upper crochet needle, a right crochet needle and a left crochet needle; after the three crochet hooks act in sequence, a metal wire can be quickly wound on a small annular sample, and the winding machine is simple in mechanism and easy to industrialize.

Disclosed herein is a system for magnetic testing of samples. The system includes: (i) a magnetic field generator configured to, by rotating a magnet(s), which is permanent, produce a temporally modulated magnetic field over a region whereat a sample is positioned; (ii) a waveguide positioned adjacently to the sample; (iii) a first sensor configured to obtain a first signal by directly and / or indirectly measuring a modulation rate of the produced magnetic field; (iv) an electromagnetic signal generator coupled to a first end of the waveguide; (v) a second sensor coupled to a second end of the waveguide and configured to obtain a measured signal by measuring a power of an electromagnetic signal transmitted through the waveguide; and (vi) a heterodyne-based demodulator communicatively associated with the first and second sensors and configured to use a reference signal, constituted by or obtained from the first signal, to demodulate the measured signal.

This invention discloses a multi-aperture magnetic induction testing device and method for use in confined spaces. The device includes a product-carrying unit, an upper probe unit and a lower probe unit correspondingly disposed on both sides of the product, and a magnetic field generating unit integrated on the lower probe unit. The magnetic field generating unit contains multiple permanent magnets. An electric slide can drive the permanent magnets to reciprocate along a direction perpendicular to the surface of the product under test, allowing the permanent magnets to synchronously approach or move away from the product, thereby achieving switching between magnetic and non-magnetic testing environments. This invention solves the problems of large size, complex circuitry, and poor synchronization of multi-aperture magnetic fields in existing technologies. It enables parallel magnetic induction testing of multiple products and multiple acupoints in confined spaces, significantly improving testing efficiency and result stability while reducing equipment costs.

The invention discloses an oil and gas fidelity core under-pressure nuclear magnetism testing system which comprises a transfer assembly, the transfer assembly is communicated with a nuclear magnetism testing assembly, the nuclear magnetism testing assembly is communicated with a high-pressure constant-temperature oil circulation assembly, and the high-pressure constant-temperature oil circulation assembly has a pressure monitoring function; the transfer assembly comprises a transfer pull rod, and the tail end of the transfer pull rod is installed in a hydraulic pull rod cabin communicated with a hydraulic oil control system. The nuclear magnetism testing assembly comprises a sample channel which penetrates through the testing cabin, a nuclear magnetism detecting device is arranged in the testing cabin, and the two ends of the sample channel are communicated with the upstream sealing section and the downstream sealing section respectively. The core can be transferred from a coring tool to a special pressure maintaining cabin under the condition of complete pressure maintaining, drilling fluid left on the surface of an inner cylinder of the core is cleaned in the transferring process, real-time nuclear magnetic resonance scanning testing is carried out, and the pore structure characteristics of the core in the pressure maintaining state are obtained; the oil and gas occurrence state and other key parameters in oil and gas geology comprehensive evaluation.

The invention relates to the technical field of biological analysis and detection, in particular to a magnetic test method for nano magnetic beads. According to the method, the glycerin aqueous solution added with the specific water-soluble polymer and the alkali metal chlorine salt is used as the medium solution to perform magnetic separation on the magnetic beads, so that the stability and the sensitivity of the magnetic bead magnetic test are greatly improved, and particularly, the method has higher distinction degree for magnetic comparison among the magnetic beads with relatively strong magnetism. A magnetic bead performance prediction system in a bionic actual combat environment is constructed, and the core contradiction that laboratory data and actual application are seriously disjointed in a traditional detection method is solved.