12 results about "Array coil" patented technology

The invention discloses an array coil excitation coupling eddy current detection probe, system and method and a related device, and relates to the technical field of nondestructive testing. The probe comprises a double-coil excitation module and a sensing module; the double-coil excitation module comprises two semicircular Helmholtz coils; the two semicircular Helmholtz coils are symmetrically arranged, are parallel and coaxial, and are electrified with alternating-current excitation current with the same direction, the same frequency and the same phase; the distance between the two semicircular Helmholtz coils is adjustable; and the sensing module is arranged in the central area of the two semicircular Helmholtz coils and is used for detecting the magnetic field change caused by the eddy current field at the defect. According to the invention, the detection precision of pipeline corrosion, cracks and composite defects can be improved.

The present application relates to the technical field of nondestructive testing, and provides a kind of dynamic characteristic eddy current detection system and method of scraper chain to solve the problems of low detection efficiency, unable to measure tension and speed synchronously, and probe is easily damaged in harsh environment and inconvenient to maintain, etc.The technical scheme of the system mainly includes: probe detection unit, adopts built-in iron core array coil layout, synchronously induces dynamic eddy current determined by chain speed and induced eddy current caused by tension change;Detection protection unit is provided with upper and lower open and close maintenance opening for quick maintenance;And detection lift-off regulation unit can accurately adjust the distance between probe and chain.The present application can realize the online synchronization, high-precision monitoring of scraper chain tension and speed, significantly improve the detection efficiency and reliability, and at the same time enhance the environmental adaptability and maintenance convenience of the system, and provide effective support for intelligent operation and maintenance of scraper conveyor.

The invention discloses an extensible three-layer decoupling array coil structure, an extensible array coil and a wireless electric energy transmission system, and relates to the technical field of wireless electric energy transmission, a partial element equivalent method is introduced to extract inductance parameters of regular hexagonal coils, the relation between the overlapping size and mutual inductance of adjacent coils is constructed, and model calculation shows that the inductance parameters of the regular hexagonal coils are calculated to be larger than the inductance parameters of the regular hexagonal coils. And when the overlapping size between the adjacent coils is 32.42 mm, the coils are decoupled. In addition, for load position detection, a flexible film pressure sensor detects a load pressure value to realize position positioning, and single-coil, double-coil and three-coil local intelligent charging modes of the array system are switched according to different load positions, so that reasonable utilization of energy is realized.

The application discloses an underwater robot detection method and system based on arrayed coils, belongs to the technical field of wireless power transmission system detection, and combines multiple detection coils to form an arrayed detection coil group, at least two arrayed detection coil groups are arranged at predetermined positions along a preset motion track of an underwater robot, an impedance change detection circuit is connected to each detection coil, the position of the underwater robot relative to the coils can be determined by using the double arrayed detection coils, different diameters of different models of the underwater robot can be distinguished, whether the underwater robot deviates can be monitored, the speed of the underwater robot at the moment can be determined, the pose of the underwater robot can be better adjusted, the measurement error can be better reduced by uniform arrangement and symmetrical distribution, the underwater robot can safely and stably enter the charging device, and the charging device and the underwater robot are prevented from being damaged.

The embodiment of the invention provides a cerebral blood flow synchronous array coil system and a cerebral blood flow detection method, and belongs to the technical field of magnetic resonance imaging. The device comprises a controller, a radio frequency power amplifier, a neck coil, a signal source and a coil connector, the controller is used for receiving a first enable signal generated by the MRI equipment cabinet, generating a second enable signal and triggering the neck coil and the matched radio frequency power amplifier to synchronously enter a working state; the signal source is used for providing a second radio frequency pulse; after receiving the second enable signal, the radio frequency power amplifier enters a working state, amplifies a second radio frequency pulse and sends the amplified second radio frequency pulse to the neck coil; the neck coil receives the second radio frequency pulse and is used for applying a pulse signal to a neck area and receiving a second enable signal to enter a working state; the coil connector is used for signal transmission between execution components. According to the embodiment, the accuracy and efficiency of cerebral blood flow detection of the experimental subject can be improved.

The utility model relates to the technical field of magnetic resonance imaging, in particular to a receiving and transmitting integrated array coil and magnetic resonance equipment. The receiving and transmitting integrated array coil comprises N coil unit groups arranged along a first direction, each coil unit group comprises M coil units arranged along a second direction, the first direction is perpendicular to the second direction, and both M and N are integers not less than 2; the M * N preamplifiers are connected to the M * N coil units in a one-to-one correspondence manner; the N power dividers are respectively connected to the M coil units in different coil unit groups in a manner of being in one-to-one correspondence with the N coil unit groups; wherein the M * N preamplifiers are used for being connected to a receiver of magnetic resonance equipment, and the N power dividers are used for being connected to the N radio frequency power amplifiers in a one-to-one correspondence mode.

This invention discloses a telescopic roller conveyor, relating to the field of conveyor technology, including protective outriggers; a flexible guardrail for protection is rotatably mounted on the top plate of the protective outriggers. By adjusting the on / off state of the electromagnetic coil inside the adsorption sleeve, dynamic rigid constraint of the telescopic boom under heavy load or high-speed conditions and energy-saving control under light load conditions are achieved, significantly improving the stability and positional accuracy of the telescopic process; the relative sliding detection mechanism of the photosensitive plate and the light emitter integrated inside the protective outriggers can automatically cut off the power to the drive motor or issue an alarm when the telescopic range exceeds the limit, effectively preventing damage from overtravel; the supporting roller adopts a radially adaptive steering rod and array sleeve combination structure, which allows the surface to automatically conform to the material contour, avoiding local stress concentration and material damage. At the same time, the equivalent diameter of the roller can be actively adjusted by controlling the array coil.

The application discloses a micro electromagnetic eddy current sensor device and a detection method thereof, and relates to a nondestructive testing technology for crack defects (12) of air holes (11) of an aircraft engine turbine blade (1). The device is connected to a detector (2) through a lead (21), and the sensor device (3) comprises a controller (31) and a detection coil (32). The detection coil (32) is characterized by being an array coil unit (321) vertically arranged in a winding direction. The volume of the detection coil unit does not need to be too small, and the manufacturing difficulty of the detection probe in the detection device is greatly reduced.

The utility model discloses a special radio frequency array coil device for horizontal field magnetic resonance intervention in the technical field of nuclear magnetic resonance, which comprises an instrument main body, a lying bed is arranged on one side of the instrument main body, a disinfection bin is arranged on one side of the instrument main body, an electric push rod is arranged at one end of the disinfection bin, a first groove is formed in the disinfection bin, and a second groove is formed in the other side of the disinfection bin. An ultraviolet disinfection lamp is arranged in the first groove, through the arrangement of the disinfection bin, the ultraviolet disinfection lamp and an ozone generator, the ultraviolet disinfection lamp can kill various pathogenic microorganisms on the surface of the coil device body, and ozone is a rapid and efficient bactericide and can kill pathogenic viruses, germs and microorganisms. According to the coil device disclosed by the invention, the biological structure of bacterial viruses is destroyed by utilizing the extremely strong oxidability of ozone, so that the effect of sterilizing and disinfecting the surface of the coil device body is realized, and the ozone is harmless to a human body, so that the using effect of the device is improved, and the service life of the coil device body is prolonged.

The defect detection device detects a defect of a rotor core, and the rotor core has a cylindrical shape centered on an axis, and has a plurality of slots which are recessed from an outer peripheral surface toward a radial inner side and are arranged at intervals in a circumferential direction. The first surface is formed by a pair of first surfaces which are opened towards the outer peripheral side when observed in the axis direction and extend in the radial direction. A tenon part which is formed by a pair of inclined surfaces which are communicated with the head part and of which the interval in the circumferential direction gradually increases toward the inner circumferential side; and a trunk section formed by a pair of second surfaces that communicate with the tenon section and extend in the radial direction, the defect detection device being provided with: a device body having a first inspection surface that comes into contact with the first surface, an inclined inspection surface that comes into contact with the inclined surface, and a second inspection surface that comes into contact with the second surface; the plurality of array coils are respectively embedded in the inner sides of the first inspection surface, the inclined inspection surface and the second inspection surface; and a plurality of permanent magnets arranged in parallel with the array coil.

The utility model discloses a kind of multi-phase row type inductors, by prefabricated array coil and a group of magnetic core assembly molding, wherein magnetic core main body is shaped as oblong block, and the side wall in three directions of magnetic core is flat, the remaining one long side wall is provided with two-to-one group array slot and penetrates top and bottom two sides, the slot aperture of the protruding post bottom formed between each group of slots is inwardly retracted by one slot, any group of coil has three folded sections of protruding post wrapped from bottom to top and electrode pad folded in opposite direction at both ends, coil is positioned in slot and a group of magnetic core is edge-bonded with protruding post opposite direction, wrap coil into an integral whole. The inductor effectively saves the space occupied by inductive device in PCB circuit, can meet the design requirement of smaller terminal product volume, and reduces the interference influence to periphery, further perfects the operation environment of circuit.

The invention relates to the technical field of magnetic resonance imaging, in particular to a low-field magnetic resonance head imaging radio-frequency coil system, which comprises a flexible array coil sensing module for acquiring head magnetic resonance original radio-frequency signals, coil coupling state data and environment interference parameters; the dynamic field intensity calibration module constructs a dynamic magnetic field distribution model, corrects low-field magnetic field uniformity deviation in real time through a multi-source magnetic field compensation algorithm, and outputs magnetic field calibration data; the intelligent imaging optimization center identifies low-field imaging artifacts by using an improved CNN-Transform model according to the original radio frequency signal and the magnetic field calibration data, locates a distortion source and generates an optimization scheme; the three-dimensional imaging reconstruction unit builds a head three-dimensional imaging model, fuses an anatomical structure and signal distribution, and outputs a preliminary imaging result; the self-adaptive radio frequency regulation and control unit predicts coil performance attenuation and imaging risks and dynamically adjusts radio frequency parameters. Therefore, the problems of unbalanced transceiving efficiency, poor universality and the like in the prior art are solved.