15 results about "Saddle coil" patented technology

Techniques and apparatus for determining quadrant-based locations of casing defects based on multi-frequency, non-collocated, induction measurements are described. An electromagnetic (EM) inspection tool is operated inside of a well including multiple casings. The EM inspection tool includes a triaxial transmitter and multiple triaxial receivers, each being located at a different spacing from the triaxial transmitter. The triaxial transmitter is configured to emit primary time-varying magnetic field signals in a radial direction, a tangential direction, and an axial direction. Each respective primary time-varying magnetic field signal induces corresponding secondary time-varying magnetic field signal(s) in the radial direction, the tangential direction, and the axial direction that are detected by one or more of the triaxial receivers. Induction measurements of the casings are obtained using the EM inspection tool, and a quadrant of a casing in which a defect of the casing is located is determined based on the induction measurements.

The invention discloses aerospace-grade vanadium-aluminum intermediate alloy material smelting equipment and a using method thereof.The aerospace-grade vanadium-aluminum intermediate alloy material smelting equipment comprises a hot melting furnace body, the top port of the hot melting furnace body is fixedly in butt joint with a deslagging assembly, the top port of the deslagging assembly is covered with a sealing cover, a magnetic pole array rotor assembly is installed below the sealing cover, and the bottom of the hot melting furnace body is a hemispherical shell; a plurality of saddle-shaped coils which are arranged in an annular array are embedded in the hemispherical shell; and a liftable liquid level adjusting block is mounted below the magnetic pole array rotor assembly. The invention relates to the technical field of smelting equipment. According to the method, the problems that in an existing vanadium-aluminum smelting technology, stirring dead angles are generated due to insufficient stirring capacity, so that macroscopic segregation and microcosmic segregation of alloy components are caused, and the requirement of aerospace-level materials for extreme uniformity cannot be met are solved.

The invention consists of a magnetic-inductive flowmeter (1) for determining a flow velocity-dependent measured quantity of a flowable medium, comprising: - a measuring tube (2) for guiding the medium; - two measuring electrodes (11, 12), - a coil system (3) for generating a magnetic field penetrating the measuring tube (2) at least section by section, wherein the coil system comprises at least one saddle coil (4a), wherein the at least one saddle coil (4a) has a saddle coil interior (5a), - a magnetic field guide (6) for guiding magnetic field lines outside the measuring tube (2), wherein the magnetic field guide (6) consists of a first field guide part (7a) and a second field guide part (7b) arranged opposite the first field guide part (7a), wherein the first field guidance part (7a) extends at least section by section into the saddle coil interior (5a), wherein the first field guidance part (7a) has an end section (EA) which is located in the saddle coil interior (5a) and which rests on the outer surface (MF) of the measuring tube (2), in particular directly, wherein in a cross-section (QS) through the at least one saddle coil (4a), the first field guidance part (7a) and the at least two measuring electrodes (11, 12) each point P located on a cross-sectional area (QS1) of the first field guidance part (7a) in the end section (EA) and each point Q located on a cross-sectional area (QS2) of the saddle coil (4a) spans a central angle δ which is greater than 12°, in particular greater than 17° and preferably greater than 22°, and less than 35°, in particular less than 32° and preferably less than 27°.

The application relates to a radio frequency coil design method for transmit array spatial encoding imaging, and belongs to the technical field of magnetic resonance imaging. In view of the problems of low single-dimension coding efficiency, strong coupling interference between coils and nonlinear phase gradient of a traditional TRASE technology, axial and radial coding coils are designed based on a target field method and a magnetic dipole method, two-dimensional radio frequency phase coding is realized through reverse current solenoid decoupling combination, and excitation and signal receiving are realized in combination with a saddle coil. Through optimization of the coil structure and decoupling design, the technical scheme achieves multi-dimensional efficient coding, high-precision phase gradient, strong anti-interference and system light weight, and is suitable for the portability and dynamic monitoring scene of low-field magnetic resonance.

The utility model discloses a saddle-shaped coil winding device which comprises a winding framework, a saddle-shaped wire groove is formed in the peripheral wall of the winding framework, an inner ring framework is arranged in the middle of the saddle-shaped wire groove, the saddle-shaped wire groove comprises a plurality of groove sections which are sequentially connected in the circumferential direction of the saddle-shaped wire groove, and a plurality of pressing assemblies are arranged in the circumferential direction of each groove section. Each pressing assembly can move perpendicular to the peripheral edge of the corresponding groove section and press the superconducting wire entering the groove section to be attached to the groove bottom of the groove section. When the saddle-shaped coil is wound by the device, the compressing assembly arranged in the circumferential direction of the groove section moves and directly presses the superconducting wire in the groove section, so that the superconducting wire is tightly attached to the groove bottom of the groove section, the superconducting wire is fixedly arranged and limited in the groove section to be attached to the groove bottom, and the phenomenon that the superconducting wire rebounds or twists or the like is avoided; the superconducting wire is ensured to be stably located at the preset position in the groove section, and the winding success rate of the saddle-shaped coil is improved.

The invention relates to a method for manufacturing a saddle coil for a gradient coil unit comprising the process steps: - providing a stabilizing pad, a planar and at least partially spiral conductor structure unit and a room temperature curing adhesive, - applying the adhesive to a first side of the conductor structure unit and / or to a first surface of the stabilizing pad according to a defined pattern, - pressing the stabilizing pad with the conductor structure unit, wherein the first side of the conductor structure unit faces the first surface of the stabilizing pad.

The invention relates to a magnetic-inductive flow meter (1) for determining a flow velocity-dependent measured quantity of a flowable medium, comprising: - a measuring tube (2) for guiding the medium, wherein the measuring tube (2) has an outer surface; - at least two measuring electrodes (11, 12, 13, 14), - a measuring electronics (100), wherein the measuring electronics (100) is electrically connected to the at least two measuring electrodes and is configured to determine a measuring voltage; - a coil system (3) for generating a magnetic field that penetrates the measuring tube (2) at least partially, wherein the coil system (3) comprises at least one saddle coil (4), - a magnetic field guide (6) for guiding magnetic field lines outside the measuring tube (2), wherein the magnetic field guide (6) consists of a first field guide part (7a) and a second field guide part (7b) arranged opposite the first field guide part (7a), wherein the first and second field guide parts (7a, 7b) are completely separated by a gap (20), wherein the gap (20) is spanned in a cross-section through the magnetic-inductive flow meter (1) by a central angle α, for which 1° ≤ α ≤ 60°, in particular 5° ≤ α ≤ 40° and preferably less than 15°.

The invention relates to a method for manufacturing a saddle coil for a gradient coil unit comprising the following process steps: - providing a stabilizing layer, a planar and at least partially spiral conductor structure unit, and a powder designed to form a powder coating by heating; - applying the powder over a surface to a first surface of the stabilizing layer and / or applying the powder over a surface to a first side of the conductor structure unit, wherein the powder is exposed to a temperature between 140°C and 220°C and forms a coating film which at least partially wets the first surface and / or the first side; - fixing the conductor structure unit to the stabilizing layer by pressing the stabilizing layer with the conductor structure unit and by curing the coating film to form a powder coating.wherein the first side of the conductor structure unit faces the first surface of the stabilizing pad.

The disclosure relates to a method for producing a saddle coil for a gradient coil unit, comprising providing a stabilizing support, a planar and at least partially spiral-shaped conductor structure unit, and a powder designed to form a powder coating when heated; applying the powder as a surface layer to a first surface of the stabilizing support and / or as a surface layer to a first side of the conductor structure unit, the powder being exposed to a temperature of between 140° C. and 220° C. and forming a lacquer film that at least partially wets the first surface and / or the first side; and fixing the conductor structure unit to the stabilizing support by pressing the stabilizing support together with the conductor structure unit and by curing the lacquer film to form a powder coating, the first side of the conductor structure unit facing the first surface of the stabilizing support.

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.

The invention provides a superconducting saddle-shaped coil framework structure which can be applied to the technical field of superconducting. The superconducting saddle-shaped coil framework structure comprises an inner supporting module which is constructed to be a saddle-shaped structure formed by twisting two opposite end portions of a three-dimensional runway-shaped annular structure, the outer side of the saddle-shaped structure is provided with a groove structure surrounding the saddle-shaped structure by a circle, and the groove bottom of the groove structure is provided with a supporting face matched with the outline of a radial inner layer of a saddle-shaped coil; the outer restraining module comprises at least one clamping block, and the clamping block is provided with a restraining face matched with the outline of the radial outer layer of the saddle-shaped coil; wherein the restraining surface and the supporting surface are oppositely arranged, and the restraining surface and the supporting surface are used for clamping the saddle-shaped coil under the condition that the clamping block is connected with the inner supporting module; the clamping blocks are detachably connected with the inner supporting module. The invention further provides a superconducting magnet and an assembly method thereof.

Techniques and apparatus for determining quadrant-based locations of casing defects based on multi-frequency, non-collocated, induction measurements are described. An electromagnetic (EM) inspection tool is operated inside of a well including multiple casings. The EM inspection tool includes a triaxial transmitter and multiple triaxial receivers, each being located at a different spacing from the triaxial transmitter. The triaxial transmitter is configured to emit primary time-varying magnetic field signals in a radial direction, a tangential direction, and an axial direction. Each respective primary time-varying magnetic field signal induces corresponding secondary time-varying magnetic field signal(s) in the radial direction, the tangential direction, and the axial direction that are detected by one or more of the triaxial receivers. Induction measurements of the casings are obtained using the EM inspection tool, and a quadrant of a casing in which a defect of the casing is located is determined based on the induction measurements.

The invention relates to a magnetic-inductive flow meter (1), comprising: a measuring tube (2) for a conducting medium, the measuring tube (2) being divided into a first side and a second side by a longitudinal plane (LE) and having an outer side surface; -a magnetic field generating device (3), the magnetic field generating device (3) comprising: at least one saddle coil (4) arranged on the outer side surface, the coil wires of the saddle coil (4) defining a saddle coil interior (5), and a saddle coil core assembly (6) having at least one saddle coil core (7), the saddle coil core assembly (6) being arranged in the saddle coil interior (5), a minimum circular sector in which the saddle-shaped coil core assembly (6) is arranged is spanned through a central angle in a cross-section of the magnetic inductive flowmeter (1), the following being adapted for the central angle; and-at least four measuring electrodes (11, 12, 13, 14), at least two measuring electrodes (11, 13) of the at least four measuring electrodes (11, 12, 13, 14) being arranged on a first side and likewise at least two measuring electrodes (12, 14) of the at least four measuring electrodes (11, 12, 13, 14) being arranged on a second side, the central angle spans the smallest circular sector in the cross-section of the at least two measuring electrodes (12, 14) in which the first side is arranged, wherein the following are adapted for the central angle.

The invention relates to a magnetic-inductive flow meter (1) for determining a flow-rate-based measurement variable of a flowable medium, comprising: - a measuring tube (2) for guiding the medium, the measuring tube (2) having an outer lateral surface; - at least two measuring electrodes (11, 12, 13, 14), - measuring electronics (100), the measuring electronics (100) being electrically connected to the at least two measuring electrodes and being designed to determine a measurement voltage; - a coil system (3) for generating a magnetic field which at least partly passes through the measuring tube (2), the coil system (3) comprising at least one saddle coil (4), and - a magnetic field guide (6) for guiding magnetic field lines outside the measuring tube (2), the magnetic field guide (6) consisting of a first field guide part (7a) and a second field guide part (7b) lying opposite the first field guide part (7a), the first and second field guide parts (7a, 7b) being completely separated by a gap (20), the gap (20) being spanned, in a cross-section of the magnetic-inductive flow meter (1), by a central angle α, for which the following applies: 1° ≤ α ≤ 60°, in particular 5° ≤ α ≤ 40°, α preferably being less than 15°.

The invention discloses a double-resonance transceiving separation device for magnetic resonance deuterium metabolism imaging, which comprises four supporting cylinders, the supporting cylinders are sequentially connected in a sleeving manner to form a layer structure, a radio frequency shielding layer supporting cylinder is arranged on the outermost layer, and a radio frequency shielding layer is arranged on the radio frequency shielding layer supporting cylinder; the 1H high-pass birdcage coil supporting cylinder is arranged on the second layer, and a 1H high-pass birdcage coil is arranged on the 1H high-pass birdcage coil supporting cylinder; a 2H saddle coil supporting cylinder is arranged on the third layer, and a 2H saddle coil is arranged on the 2H saddle coil supporting cylinder; the 2H double-array receiving coil supporting cylinder is arranged on the innermost layer, and a 2H double-array receiving coil is arranged on the 2H double-array receiving coil supporting cylinder; the 2H saddle coil and the 2H double-array receiving coil are respectively provided with a detuning circuit. According to the device, a double-resonance mode is adopted, and errors caused by replacement of resonance coils in 1H and 2H imaging experiments of traditional nuclear magnetic resonance are eliminated.